阅读说明：本技术 一种便于校验误差的流量测量系统和误差校验方法 (Flow measurement system convenient for error checking and error checking method ) 是由 侯飞 侯铁信 汪毅 金鹏 于 2019-09-26 设计创作，主要内容包括：本发明公开了一种便于校验误差的流量测量系统和误差校验方法,该流量测量系统包括：至少两级1进n出的流量阵列,每一级1进n出的流量阵列包括一个位于进线侧的流量传感器总表和n个位于出线侧的流量传感器分表,一个位于进线侧的流量传感器总表和n个位于出线侧的流量传感器分表构成相对能量守恒关系；针对相邻两级1进n出的流量阵列,在上一级1进n出的流量阵列中位于出线侧的流量传感器分表,为下一级1进n出的流量阵列位于进线侧的流量传感器总表。在本发明中,通过1进n出的流量可以减小数据计算规模,减弱用户使用流量的习惯相似造成流量数据计算面临的多重共线性影响,提高计算的效率以及计算的精度。(The invention discloses a flow measuring system and an error checking method convenient for error checking, wherein the flow measuring system comprises: the flow array of at least two stages of 1 in and n out, the flow array of each stage of 1 in and n out comprises a flow sensor general table positioned at an incoming line side and n flow sensor branch tables positioned at an outgoing line side, and the flow sensor general table positioned at the incoming line side and the n flow sensor branch tables positioned at the outgoing line side form a relative energy conservation relation; for the flow arrays of the two adjacent stages of 1 in and n out, the flow sensor branch table positioned on the outlet side in the flow array of the previous stage 1 in and n out is a flow sensor general table positioned on the inlet side of the flow array of the next stage 1 in and n out. In the invention, the data calculation scale can be reduced through the 1-in/n-out flow, the multiple collinearity influence on the flow data calculation caused by the similar habits of using the flow of the user is weakened, and the calculation efficiency and the calculation precision are improved.)

1. A flow measurement system that facilitates error verification, wherein the flow measurement system of a pipeline with a flow sensor is configured as an aggregate of a plurality of subsystems that facilitate error calculation, comprising: the flow array comprises at least two stages of 1 in-out flow arrays, wherein each stage of 1 in-out flow array comprises a flow sensor total table positioned on an incoming line side and n flow sensor sub tables positioned on an outgoing line side, and the flow sensor total table positioned on the incoming line side and the n flow sensor sub tables positioned on the outgoing line side form a relative energy conservation relation;

the flow sensor sub-meter positioned on the outlet side in the flow array of the inlet n and the outlet n of the previous stage 1 is a flow sensor general meter positioned on the inlet side in the flow array of the inlet n and the outlet n of the next stage 1.

2. The flow measurement system of claim 1, wherein the flow sensor comprises any one of an electrical energy sensor, an electrical current sensor, an electrical power sensor, a water meter, a natural gas meter, or a pipeline flow sensor.

3. The flow measuring system of claim 1, wherein the 1 in n out flow array is a 1 in 2 out flow array, and each stage of the 1 in 2 out flow array comprises a total flow sensor meter on the incoming line side and 2 branch flow sensor meters on the outgoing line side, and a total flow sensor meter on the incoming line side and 2 branch flow sensor meters on the outgoing line side form a relative energy conservation relationship.

4. The flow measuring system of claim 1, further comprising an error reference standard device connected in series on a branch of any flow sensor;

when the error reference standard device is arranged on a branch of the flow array which is at the last stage 1, the flow array enters and exits from n, an error reference value is transmitted in a mode of calculation from the lower level to the upper level, so that a flow measurement system is calibrated to obtain error-free data or equal error data;

when the error reference standard device is arranged on a branch of the flow array which is at the top level 1 and enters or exits, transmitting an error reference value in a mode of progressively calculating from the upper level to the lower level so as to calibrate the flow measurement system and obtain error-free data or equal error data;

when the error reference standard device is arranged on a branch of the flow array which is input into and output from the middle stage 1, an error reference value is transmitted in a mode of progressive calculation from the middle stage to the upper stage and in a mode of progressive calculation from the middle stage to the lower stage, so that the flow measurement system is calibrated to obtain error-free data or equal error data.

5. The flow measurement system of claim 1, comprising a first 1 in n out flow array and a second 1 in n out flow array, wherein the first 1 in n out flow array and the second 1 in n out flow array are independent of each other;

the flow measuring system also comprises an error reference standard device, the error reference standard device is arranged on a pipeline branch of the first 1 in n out flow array, the error reference standard device is also arranged on a pipeline branch of the second 1 in n out flow array, and a switch is arranged on the selected pipeline branch;

wherein a pipeline branch into which the error reference standard device is connected in series is switched by setting a state of a switch to selectively connect the error reference standard device in series to the first 1 in n out flow array or the second 1 in n out flow array.

6. The flow measuring system of claim 1, comprising a microprocessor coupled to each flow sensor and a data transfer module coupled to the microprocessor for sending flow data collected by the microprocessor from each flow sensor to a cloud server.

7. A method of error checking a flow measurement system, the flow measurement system comprising: the flow array comprises at least two stages of 1 in-out flow arrays, wherein each stage of 1 in-out flow array comprises a flow sensor total table positioned on an incoming line side and n flow sensor sub tables positioned on an outgoing line side, and the flow sensor total table positioned on the incoming line side and the n flow sensor sub tables positioned on the outgoing line side form a relative energy conservation relation;

the flow sensor sub-meter positioned on the outlet side in the flow array of the inlet n and the outlet n of the previous stage 1 is a flow sensor general meter positioned on the inlet side in the flow array of the inlet n and the outlet n of the next stage 1 aiming at the flow arrays of the inlet n and the outlet n of the two adjacent stages 1;

the error checking method comprises the following steps:

specifying or establishing an error reference standard device in the flow measurement system and giving a reference error value to the error reference standard device;

acquiring original measurement data of flow sensors on all input branches and all output branches in the flow measurement system and original measurement data of the error reference standard device;

calculating a reference measurement error value of a flow sensor in a 1 in n out flow array where the error reference standard device is located by utilizing a relative energy conservation relation aiming at the 1 in n out flow array where the error reference standard device is located;

acquiring a flow array which has a relation of the flow sensor which is calculated to obtain a reference measurement error value and is in an in-n-out relation with the previous or next 1, and calculating the reference measurement error value of the flow sensor in the corresponding flow array which is in the in-n-out relation with the previous or next 1 by utilizing a relative energy conservation relation;

and calculating the reference measurement error value process of the flow sensors in the flow array with 1 inlet and n outlets by one or more times through the previous stage or the next stage, thereby obtaining the reference measurement error values of all the flow sensors in the flow measurement system, and compensating the original measurement data according to the reference measurement error value of each flow sensor to obtain equal error data or error-free data.

8. The error-checking method of claim 7, wherein the compensating the raw measurement data based on the reference measurement error value of each flow sensor to obtain equal error data or error-free data comprises:

compensating the corresponding original measurement data by using the reference measurement error value to obtain equal error data of the reference error value of each flow sensor relative to the error reference standard device; when delta X deviation exists between a real error value and a reference error value of the error reference standard device, compensating equal error data of each corresponding flow sensor by utilizing the delta X deviation to obtain error-free data; alternatively, the first and second electrodes may be,

and directly calculating to obtain error-free data corresponding to each flow sensor according to the real error value of the error reference standard device.

9. The error checking method according to claim 8, wherein obtaining Δ X deviation between a true error value and a reference error value of the error reference standard device specifically comprises:

taking down the flow sensor selected as the error reference standard device, and measuring the real error value of the taken down flow sensor; the reference error value of the selected flow sensor is subtracted from the true error value of the removed flow sensor to obtain the Δ X offset.

10. The error-checking method according to claim 8, characterized in that the error reference standard means and the assigned reference error value are determined, in particular:

a first flow sensor with a known real error value is connected in series on a branch of any flow sensor of the flow measuring system;

in the running process of the flow measuring system, respectively reading the flow data of the first flow sensor and the flow data of the flow sensor on the selected branch, and calculating the real error value of the flow sensor on the selected branch;

the flow sensor on the selected branch acts as an error reference standard and the true error value of each connected flow sensor in the flow measurement system is calculated using the calculated true error value of the flow sensor on the selected branch.

11. The error-checking method of claim 8, wherein the error is referenced to an error value of a standard device, comprising:

in the flow measurement system, after any flow sensor is selected as an error reference standard device, a preset reference error value is matched with the measurement error of the error reference standard device, wherein the difference value between the preset reference error value of the error reference standard device and the actual error value of the error reference standard device is equal to the delta X deviation.

12. The error-checking method of claim 8, further comprising:

after the original measurement data of the flow sensor are collected, determining the similar condition of each original measurement data;

if the similarity of at least two groups of original measurement data is greater than a preset similarity threshold, the measurement error of each flow sensor is calculated in a cascade mode in a grading calculation mode so as to verify the original measurement data;

if the similarity of each group of original measurement data is smaller than a preset similarity threshold, the flow sensors in the flow array at the last stage 1 inlet and outlet are divided into tables, and the flow sensors in the flow array at the top stage 1 inlet and outlet are summed up to obtain the measurement errors of the corresponding flow sensors by using the relative energy conservation relation, so as to check the original measurement data.

Technical Field

The invention belongs to the technical field of intelligent meter measurement, and particularly relates to a flow measurement system convenient for error verification and an error verification method.

Background

At present, flow sensors such as electric meters, water meters, gas meters or other flow meters which are used in large quantities cannot be removed to detect flow errors in laboratories due to too large amount of usage in real life. There is a need to find techniques and methods for online detection of errors in these flow sensors;

for a mathematical algorithm, when a flow measurement system is large, a plurality of flow sensors are included in the flow measurement system, the multiple collinearity problem of flow meter data can be derived from the similarity of user flow consumption habits, and the calculation accuracy of the data calculation method is influenced.

Conventionally, flow sensors are installed on a pipeline or a node of a measured flow measurement system, and a flow at each point is measured, and it is necessary to separately verify a measurement error of each flow sensor. The problem that this kind of method brings is that the work load of flow sensor error check-up is huge, and the cost is too high.

In view of the above, overcoming the drawbacks of the prior art is an urgent problem in the art.

Disclosure of Invention

The invention provides a flow measurement system and an error checking method convenient for error checking, aiming at constructing a flow measurement system of any scale through a 1 in n out flow array, dividing a flow measurement system with a larger scale into a plurality of flow arrays with smaller scales through the 1 in n out flow array, wherein each flow array meets the relative energy conservation law, respectively calculating the error of a flow sensor in each flow array, weakening the multiple collinearity influence of flow data calculation caused by similar habits of using flow of users, and improving the calculation efficiency and the calculation precision, thereby solving the technical problem of multiple collinearity of flow data.

To achieve the above object, according to one aspect of the present invention, there is provided a flow measuring system for facilitating error checking, the flow measuring system of a pipeline with a flow sensor being constructed in a structure in which a plurality of subsystems for facilitating error calculation are summed, comprising: the flow array comprises at least two stages of 1 in-out flow arrays, wherein each stage of 1 in-out flow array comprises a flow sensor total table positioned on an incoming line side and n flow sensor sub tables positioned on an outgoing line side, and the flow sensor total table positioned on the incoming line side and the n flow sensor sub tables positioned on the outgoing line side form a relative energy conservation relation;

the flow sensor sub-meter positioned on the outlet side in the flow array of the inlet n and the outlet n of the previous stage 1 is a flow sensor general meter positioned on the inlet side in the flow array of the inlet n and the outlet n of the next stage 1.

Preferably, the flow sensor includes any one of an electric power sensor, a current sensor, an electric power sensor, a water meter, a natural gas meter, or a pipeline flow sensor.

Preferably, the 1 in n out flow array is a 1 in 2 out flow array, each stage of the 1 in 2 out flow array includes a flow sensor total table located at the incoming line side and 2 flow sensor sub tables located at the outgoing line side, and one flow sensor total table located at the incoming line side and 2 flow sensor sub tables located at the outgoing line side form a relative energy conservation relation.

Preferably, the flow measurement system further comprises an error reference standard device, and the error reference standard device is connected in series to a branch where any flow sensor is located;

when the error reference standard device is arranged on a branch of the flow array which is at the last stage 1, the flow array enters and exits from n, an error reference value is transmitted in a mode of calculation from the lower level to the upper level, so that a flow measurement system is calibrated to obtain error-free data or equal error data;

when the error reference standard device is arranged on a branch of the flow array which is at the top level 1 and enters or exits, transmitting an error reference value in a mode of progressively calculating from the upper level to the lower level so as to calibrate the flow measurement system and obtain error-free data or equal error data;

when the error reference standard device is arranged on a branch of the flow array which is input into and output from the middle stage 1, an error reference value is transmitted in a mode of progressive calculation from the middle stage to the upper stage and in a mode of progressive calculation from the middle stage to the lower stage, so that the flow measurement system is calibrated to obtain error-free data or equal error data.

Preferably, the flow measurement system comprises a first 1 in n out flow array and a second 1 in n out flow array, wherein the first 1 in n out flow array and the second 1 in n out flow array are independent of each other;

the flow measuring system also comprises an error reference standard device, the error reference standard device is arranged on a pipeline branch of the first 1 in n out flow array, the error reference standard device is also arranged on a pipeline branch of the second 1 in n out flow array, and a switch is arranged on the selected pipeline branch;

wherein a pipeline branch into which the error reference standard device is connected in series is switched by setting a state of a switch to selectively connect the error reference standard device in series to the first 1 in n out flow array or the second 1 in n out flow array.

Preferably, the flow measurement system comprises a microprocessor and a data transmission module, the microprocessor is connected with each flow sensor, and the data transmission module is connected with the microprocessor and used for sending the flow data acquired by the microprocessor from each flow sensor to the cloud server.

According to another aspect of the present invention, there is provided an error checking method of a flow measurement system including: the flow array comprises at least two stages of 1 in-out flow arrays, wherein each stage of 1 in-out flow array comprises a flow sensor total table positioned on an incoming line side and n flow sensor sub tables positioned on an outgoing line side, and the flow sensor total table positioned on the incoming line side and the n flow sensor sub tables positioned on the outgoing line side form a relative energy conservation relation;

the flow sensor sub-meter positioned on the outlet side in the flow array of the inlet n and the outlet n of the previous stage 1 is a flow sensor general meter positioned on the inlet side in the flow array of the inlet n and the outlet n of the next stage 1 aiming at the flow arrays of the inlet n and the outlet n of the two adjacent stages 1;

the error checking method comprises the following steps:

specifying or establishing an error reference standard device in the flow measurement system and giving a reference error value to the error reference standard device;

acquiring original measurement data of flow sensors on all input branches and all output branches in the flow measurement system and original measurement data of the error reference standard device;

calculating a reference measurement error value of a flow sensor in a 1 in n out flow array where the error reference standard device is located by utilizing a relative energy conservation relation aiming at the 1 in n out flow array where the error reference standard device is located;

acquiring a flow array which has a relation of the flow sensor which is calculated to obtain a reference measurement error value and is in an in-n-out relation with the previous or next 1, and calculating the reference measurement error value of the flow sensor in the corresponding flow array which is in the in-n-out relation with the previous or next 1 by utilizing a relative energy conservation relation;

and calculating the reference measurement error value process of the flow sensors in the flow array with 1 inlet and n outlets by one or more times through the previous stage or the next stage, thereby obtaining the reference measurement error values of all the flow sensors in the flow measurement system, and compensating the original measurement data according to the reference measurement error value of each flow sensor to obtain equal error data or error-free data.

Preferably, the compensating the raw measurement data according to the reference measurement error value of each flow sensor to obtain equal error data or error-free data includes:

compensating the corresponding original measurement data by using the reference measurement error value to obtain equal error data of the reference error value of each flow sensor relative to the error reference standard device; when delta X deviation exists between a real error value and a reference error value of the error reference standard device, compensating equal error data of each corresponding flow sensor by utilizing the delta X deviation to obtain error-free data; alternatively, the first and second electrodes may be,

and directly calculating to obtain error-free data corresponding to each flow sensor according to the real error value of the error reference standard device.

Preferably, the Δ X deviation between the real error value and the reference error value of the error reference standard device is obtained by:

taking down the flow sensor selected as the error reference standard device, and measuring the real error value of the taken down flow sensor; the reference error value of the selected flow sensor is subtracted from the true error value of the removed flow sensor to obtain the Δ X offset.

Preferably, the error reference standard means and the assigned reference error value are determined, in particular:

a first flow sensor with a known real error value is connected in series on a branch of any flow sensor of the flow measuring system;

in the running process of the flow measuring system, respectively reading the flow data of the first flow sensor and the flow data of the flow sensor on the selected branch, and calculating the real error value of the flow sensor on the selected branch;

the flow sensor on the selected branch acts as an error reference standard and the true error value of each connected flow sensor in the flow measurement system is calculated using the calculated true error value of the flow sensor on the selected branch.

Preferably, the error is referenced to a reference error value of a standard device, including:

in the flow measurement system, after any flow sensor is selected as an error reference standard device, a preset reference error value is matched with the measurement error of the error reference standard device, wherein the difference value between the preset reference error value of the error reference standard device and the actual error value of the error reference standard device is equal to the delta X deviation.

Preferably, the error checking method further includes:

after the original measurement data of the flow sensor are collected, determining the similar condition of each original measurement data;

if the similarity of at least two groups of original measurement data is greater than a preset similarity threshold, the measurement error of each flow sensor is calculated in a cascade mode in a grading calculation mode so as to verify the original measurement data;

if the similarity of each group of original measurement data is smaller than a preset similarity threshold, the flow sensors in the flow array at the last stage 1 inlet and outlet are divided into tables, and the flow sensors in the flow array at the top stage 1 inlet and outlet are summed up to obtain the measurement errors of the corresponding flow sensors by using the relative energy conservation relation, so as to check the original measurement data.

Generally, compared with the prior art, the technical scheme of the invention has the following beneficial effects: the invention provides a flow measurement system and an error checking device convenient for error checking, the flow measurement system provided by the invention comprises at least two stages of 1 in n out flow arrays, wherein the 1 in n out flow arrays can not only construct a flow measurement system of any scale, but also divide the flow measurement system with larger scale into a plurality of flow arrays with smaller scale through the 1 in n out flow arrays, each flow array meets the relative energy conservation law, the error of a flow sensor in each flow array is respectively calculated, the multiple collinearity influence faced by flow data calculation caused by similar habits of using flow by users is weakened, and the calculation efficiency and the calculation accuracy are improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic diagram of a flow measurement system that facilitates error verification according to an embodiment of the present invention;

FIG. 2 is a schematic block diagram of another flow measurement system that facilitates error verification according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a circuit structure based on a sharing standard according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an electric meter box according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of another electricity meter box provided by the embodiment of the invention;

fig. 6 is a schematic structural diagram of an error checking method according to an embodiment of the present invention;

FIG. 7 is a flowchart illustrating a first implementation manner of step 10 in FIG. 6 according to an embodiment of the present invention;

fig. 8 is a schematic flow chart of a second implementation manner of step 10 in fig. 6 according to an embodiment of the present invention;

fig. 9 is a schematic flowchart of a third implementation manner of step 10 in fig. 6 according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of a flow measurement system and a known Δ X offset flow sensor configuration according to an embodiment of the present invention;

FIG. 11 is a schematic diagram of a flow measurement system configured to measure deviation from another known Δ X according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of an error calibration apparatus according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The error reference standard device refers to a standard device used as an error reference standard, so that the determination error in the description refers to the standard device, and flow data reported by the error reference standard device is used as an error reference standard for breaking a homogeneous equation in the calculation process. Whether using physical experimentation or mathematical calculation, the measurement of any one quantity is relative to a reference; the detection of any one measurement error is relative to an error reference, and the standard or data for the error reference is referred to as the error reference. For example, a "standard meter" in the experiment of error checking of the conventional electric energy meter is an error reference standard. When the error is calculated by using the electric energy data, the data error of the electric energy sensor used as the reference datum data is the error reference standard calculated at this time.

The equal error data according to the present invention means: for any sensor with errors, after the measurement error of the sensor is detected, the detected error value is used for carrying out error calibration processing on the original measurement data (the original measurement data carries errors) of the sensor, and the errors of all the obtained calibrated flow data are equal to the errors caused by the detection error method. These calibrated power data are referred to as "equal error" data. The "equal error" is equal to the error value of the error reference standard itself (also described as Δ X deviation in embodiments of the invention). Under the concept of equal error, after error calibration processing, the measurement error of each electric energy data of the sensing system is the same. The equal error concept is an effective theory which is put forward by the inventor after years of research in the field of sensing systems.

The error-free data of the invention refers to: for any equal error data, when its "equal error" is measured and calibrated, the obtained data is the error-free data. Considering that it is theoretically impossible to have absolute error-free data, it can be said in other words that error-free data is data with no or negligible errors.

Example 1:

at present, when the flow measurement system is large in scale, due to the similarity of the user flow consumption habits, the problem of multiple collinearity of flow meter data is derived, so that not only can the calculation efficiency be reduced, but also the calculation accuracy of the data calculation method is influenced. In order to solve the foregoing problems, this embodiment provides a flow measurement system convenient for error checking, and in practical use, the flow measurement system of a pipeline with a flow sensor is configured as a structure of a summation of a plurality of subsystems convenient for error calculation, and the flow measurement system includes at least two stages of flow arrays in and out of 1, where the flow array in and out of 1 can not only configure a flow measurement system of any scale, but also divide the flow measurement system of a larger scale into a plurality of flow arrays of a smaller scale through the flow array in and out of 1, and each flow array satisfies the law of conservation of relative energy, and calculates the error of the flow sensor in each flow array respectively, so as to effectively reduce the multiple collinearity problem of flow data.

Wherein the correct network topology relationships are met for the plurality of flow sensors in each flow array. The network topology relation refers to the connection and affiliation relation between the incoming line side flow sensor and the outgoing line side flow sensor, wherein the concept of the incoming line side flow sensor and the outgoing line side flow sensor is relatively speaking, and is a relation between a flow total table and a flow sub-table.

With reference to fig. 1, a schematic structural diagram of a flow rate measurement system of the present embodiment is described, the flow rate measurement system including: the flow array comprises at least two stages of 1 in and n out flow arrays, wherein each stage of 1 in and n out flow array comprises a flow sensor total table positioned on an incoming line side and n flow sensor sub tables positioned on an outgoing line side, and the flow sensor total table positioned on the incoming line side and the n flow sensor sub tables positioned on the outgoing line side form a relative energy conservation relation. Wherein n is a positive integer and n is more than or equal to 2.

The flow sensor sub-meter positioned on the outlet side in the flow array of the inlet n and the outlet n of the previous stage 1 is a flow sensor general meter positioned on the inlet side in the flow array of the inlet n and the outlet n of the next stage 1.

In this embodiment, the upper stage and the lower stage are relative concepts, in which, except for the flow sensor at the uppermost stage and the flow sensor at the last stage, the flow sensor located in the middle is subject to the flow array at the upper stage 1 in n out or the flow array at the lower stage 1 in n out among different flow arrays at 1 in n out, and when a certain flow sensor is subject to the flow array at the upper stage 1 in n out, the flow sensor is a flow sensor sub-table; when a certain flow sensor belongs to the flow array which enters and exits from the next stage 1, the flow sensor is a flow sensor general table.

Wherein, the flow sensor comprises any one of an electric energy sensor, a current sensor, an electric power sensor, a water meter, a natural gas meter or a pipeline flow sensor.

The smaller the value of n is, the smaller the computing system corresponding to the flow array with 1 inlet and n outlet is, and the smaller the multiple collinearity influence is. In a preferred scheme, n is 2, the 1 in and n out flow array is a 1 in and 2 out flow array, each stage of the 1 in and 2 out flow array includes a flow sensor total table located on an incoming line side and 2 flow sensor sub tables located on an outgoing line side, the flow sensor total table located on the incoming line side and the flow sensor sub tables located on the outgoing line side form a relative energy conservation relation, the 1 in and 2 out flow array is a minimum system, and the effect of suppressing multiple collinearity problems is the best.

In a practical application scenario, the 1-in-2-out flow array is the simplest 1-in-n-out flow array with n being 2, and is a 1-in-2-out flow pipeline system with a flow sensor. In theory, a plurality of 1-in 2-out flow arrays can be used to form a flow measurement system capable of meeting any customer requirements, the flow of the flow measurement system can be realized through each 1-in 2-out flow array, and the flow sensor can calculate through the 1-in 2-out flow array. The greatest technical advantage of a 1-in-2-out flow array is that it minimizes the effects of multiple co-linearity problems with flow data.

Sometimes, considering the constraints of the number of users and the construction cost of the flow measurement system, the scale of the flow array unit needs to be increased, and compared with the minimum scale of n being 2, the suppression effect of part of multiple collinearity problems is sacrificed when the flow array is input and output by 1; without loss of generality, the 1 in n out traffic array is discussed below.

First, the error calculation and compensation for the 1 in n out flow array will be explained.

For a flow measurement system with 1 inflow line and n outflow lines, the flow rate conforms to the relative conservation of energy relationship, i.e., the following equation is satisfied:

wherein w is in the above formula₀，x₀And w_i，x_iAnd respectively representing the raw measurement data and the error of the 1 flow sensor summary table corresponding to the ith flow sensor.

In the foregoing formula, x₀And x_iAny one of which is a known quantity, the error value of the other flow sensor can be calculated by reading the data not less than n times.

The error value obtained by calculation is used for compensating the reading of the flow sensor general table and the flow sensor sub table, and the flow data without error or equal error can be obtained:

w′₀＝w₀(1+x₀)

w′_i＝w_i(1+x_i)

wherein, w'₀And w'_iRespectively representing the flow data of the compensated flow sensor general meter and the flow sensor sub-meter, wherein the compensated data also meet the relative energy conservation relation:

in the foregoing calculation process, an error reference standard needs to be set, and error-free data or equal error data can be obtained through the error reference standard, so as to perform error correction on the flow measurement system.

The selection or setting of the reference standard for error includes at least the following ways: a cascade computing transfer method; a method of sharing a standard; a standard method of concatenation; and (4) a post correction method.

The cascade computation transfer method comprises the following steps: and selecting a flow sensor as an error reference standard device on a branch of the flow array which enters or exits from a certain stage 1, and giving a reference error value to the error reference standard device.

Specifically, when the error reference standard device is arranged on a branch of a flow array which is input and output at the last stage 1, the error reference value is transmitted in a mode of calculation from the lower stage to the upper stage, so that the flow measurement system is calibrated to obtain error-free data or equal error data; when the error reference standard device is arranged on a branch of the flow array which is at the top level 1 and goes in and out of n, an error reference value is transmitted in a mode of calculation from the upper level to the lower level, so that the flow measurement system is calibrated, and error-free data or equal error data is obtained. In a preferred embodiment, the error reference standard device may be disposed at the middle stage, so that the calibration may be performed from the middle stage to both ends, and the calculation efficiency may be improved, specifically, when the error reference standard device is disposed on the branch of the traffic array from the middle stage 1, the error reference value is transmitted by a manner of calculation from the middle stage to the upper stage, and by a manner of calculation from the middle stage to the lower stage, so as to calibrate the traffic measurement system, and obtain error-free data or equal error data.

For example, a "1" in a 1 in n out flow array (for which an error value has been calculated) of each lower level may be a subset of a "n" in a 1 in n out flow array of another upper level (for which an error has yet to be calculated); similarly, a subset of "n" in the 1 in n out flow array of each upper level (for which the error value has been calculated) may be "1" in the "1 min n array unit" of another lower level (for which the error value has yet to be calculated). In this way, the error reference values are transferred in a cascaded manner, and verification is performed for each flow sensor in the independent 1 in n out flow array.

When delta X deviation exists between the real error value and the reference error value of the error reference standard device, the equal error data of each corresponding flow sensor is compensated by the delta X deviation, and error-free data are obtained. When the reference error value of the error reference standard device is the same as the real error value of the error reference standard device, the error-free data corresponding to each flow sensor is obtained by calculation directly according to the real error value of the error reference standard device.

The method for sharing the standard refers to the following steps: a known or unknown error flow sensor is connected in series with any branch pipeline in 1 flow array with 1 inlet and n outlets to be used as an error reference standard device, and the error calculation of the flow sensor corresponding to the 1 inlet and n outlet flow array can be completed. Then, the same known or unknown error flow sensor is connected in series to any branch pipeline in the adjacent 1 flow array with 1 in n out through pipeline switching, and the branch pipeline is used as an error reference standard device, so that the error calculation of the flow sensor of the adjacent 1 in n out flow array can be completed. By sharing the standard method, error magnitude transfer between 2 independent 1 in n out flow arrays can be used.

Specifically, the flow measurement system comprises a first 1 in n out flow array and a second 1 in n out flow array, wherein the first 1 in n out flow array and the second 1 in n out flow array are independent of each other;

the flow measuring system also comprises an error reference standard device, the error reference standard device is arranged on a pipeline branch of the first 1 in n out flow array, the error reference standard device is also arranged on a pipeline branch of the second 1 in n out flow array, and a switch is arranged on the selected pipeline branch; wherein a pipeline branch into which the error reference standard device is connected in series is switched by setting a state of a switch to selectively connect the error reference standard device in series to the first 1 in n out flow array or the second 1 in n out flow array.

For example, the corresponding circuit structure design can refer to fig. 3, and the pipeline switching is performed by controlling the on/off of the corresponding switch. As shown in fig. 3, taking the 1 in 2 out flow array as an example for explanation, the first 1 in 2 out flow array and the second 1 in 2 out flow array are independent from each other, the error reference standard device is connected in series to one of the branch lines of the first 1 in 2 out flow array and the second 1 in 2 out flow array, a switch K1 is arranged on the branch line of the first 1 in 2 out flow array, a switch K1 is connected in parallel to the error reference standard device, a switch K1 and the error reference standard device are both connected in series to the flow sensor on the selected branch line, and a switch K2 is arranged between the error reference standard device and the flow sensor on the selected branch line; meanwhile, a switch K3 is arranged on a pipeline branch of the flow array of the second 1 inlet and the second 2 outlet, a switch K3 is connected with the error reference standard device in parallel, the switch K3 and the error reference standard device are connected with the flow sensor on the selected branch in series, and a switch K4 is arranged between the error reference standard device and the flow sensor on the selected branch. The switches K1-K4 can be switch channels of relays, and the relays control the on-off of the corresponding switches K1-K4.

In practical use, when the switch K1 is set to the open state, the switch K2 is set to the closed state, the switch K3 is set to the closed state, and the switch K4 is set to the open state, the error reference standard device is connected in series to the pipeline corresponding to the first 1 in 2 out flow array, and as an error reference standard, error checking is performed on the flow sensors in the first 1 in 2 out flow array.

In practical use, when the switch K1 is set to be in a closed state, the switch K2 is set to be in an open state, the switch K3 is set to be in an open state, and the switch K4 is set to be in a closed state, the error reference standard device is connected in series to the pipeline corresponding to the flow array of the second 1 in 2 out, and as an error reference standard, error checking is performed on the flow sensors in the flow array of the second 1 in 2 out.

In this embodiment, the error calibration of two independent 1 in 2 out flow arrays can be completed by one error reference standard device, and the normal operation of each other is not affected. In the 1 in/n out traffic array, the method of sharing the standard is similar, and will not be described herein.

Wherein, the standard method of concatenation refers to: the method is characterized in that a flow sensor with known errors is connected into any branch pipeline in a flow array with 1 inlet and n outlets in series and used as an error reference standard device, and therefore error calculation of the flow sensor of the flow array with 1 inlet and n outlets can be completed.

The post correction method comprises the following steps: and selecting 1 branch flow sensor in the 1 in-out flow array, giving a reference error value to the branch flow sensor, and calculating the errors of all the flow sensors in the 1 in-out flow array. Taking down any branch pipeline flow sensor from the flow array of 1 in and n out, using standard experiment method to measure its real error value, using set reference error value and its real error value to calculate the deviation between them, using the deviation to correct the error of all flow sensors to obtain the real error of all flow sensors, then correcting the original measured data to obtain error-free data.

Further, the flow measurement system comprises a microprocessor and a data transmission module, wherein the microprocessor is connected with each flow sensor, and the data transmission module is connected with the microprocessor and used for sending the flow data acquired by the microprocessor from each flow sensor to the cloud server.

And the I/O ports with the preset number in the microprocessor are set to be connected with the data transmission ends of the flow sensors with the preset number. The acquisition end of the flow sensor sub-meter positioned at the last stage is coupled with a user line and/or a user pipeline which are responsible for detection, and is used for feeding back the actual use condition of a corresponding user to the microprocessor; the data transmission module is connected with the microprocessor and used for sending the detection data collected from the flow sensors to the cloud server when needed.

With reference to the above embodiments, the flow measurement system provided by the present invention includes at least two stages of 1 in n out flow arrays, where the 1 in n out flow array can not only construct a flow measurement system of any scale, but also divide the flow measurement system of a larger scale into a plurality of smaller scale flow arrays through the 1 in n out flow array, and each flow array satisfies the law of relative energy conservation, and calculates the error of the flow sensor in each flow array, thereby reducing the multiple collinearity influence on flow data calculation caused by similar habits of using flow by users, and improving the calculation efficiency and calculation accuracy.

Example 2:

in practical use, the 1 in n out flow array has a plurality of application scenarios, for example, the 1 in n out flow array can be used as an error correction tool of the flow meter, and the 1 in n out flow array is used as an error-free sensor system to check errors of flow sensors connected in series on a pipeline branch thereof by using calculation error and error compensation; the 1 in and n out flow array can be used as a subsystem of a mesh flow sensor system; the flow meter is designed and manufactured by adopting the principle of a 1-in-n-out flow array.

In addition, the flow arrays with 1 inlet and n outlets can be connected in an expanding way, and the method for cascading the expanded flow measurement system comprises the following steps: by cascading 2 flow arrays with 1 in and n out, a flow measurement system capable of measuring errors of flow sensors can be constructed, specifically, a '1' in the flow array with 1 in and n out of the lower level is connected to the flow array with 1 in and n out of the upper level (the error is yet to be calculated) to become a subset of 'n', and 2 flow arrays with 1 in and n out are connected to form 1 new flow measurement system, wherein the error values of all the flow sensors can be calculated.

In addition, the 1 in n out flow array can deal with sensor burst failure, for example, for (n +1) flow sensors in the 1 in n out flow array, if the jth flow sensor has a burst failure, the flow measurement function is lost, and the flow data w 'of the burst failure flow sensor can be obtained by the following formula'_j：

By the aid of the mode, the risk that flow data are lost due to work of the flow sensor can be avoided.

In this embodiment, a minimum flow measurement system can be constructed by a 1-in-n-out flow array, the scale of the flow measurement system is reduced as much as possible, multiple co-linear influences on flow data calculation caused by similar habits of using flow by users are weakened, and the error calculation accuracy of the flow sensor is improved.

The use of a 1 in 2 out flow array in an electricity meter box is illustrated below.

With reference to fig. 4, a product form of the electric meter box is shown, the flow sensor can be specifically a sampling resistor, the electricity utilization condition of the user is obtained through the sampling resistor, wherein the sampling resistor (sub-meter) of the flow array of the last stage 1 in and 2 out is used for being coupled with the line of the user, so as to detect the electricity utilization condition of the user, the sampling resistors of the flow array of the other stage 1 in and 2 out are all integrated and arranged in the meter calibrating device, so that a large-scale power supply system is divided into a plurality of small power supply systems, the meter calibrating device can calibrate the meter in a grading manner when calibrating the meter, the data processing amount at each time is reduced, the calculation efficiency can be improved, and the multiple collinearity influence faced by the calculation of the flow data caused by the habitual similarity of the electricity consumption of the user can be weakened.

In combination with fig. 5, another product form of an electric meter box is shown, the flow sensor can be specifically a sampling resistor, the electricity utilization condition of a user is obtained through the sampling resistor, wherein the sampling resistor (sub-meter) of the flow array of the last stage 1 in and 2 out is used for being coupled with a line of the user, so as to detect the electricity utilization condition of the user, the sampling resistors of the flow array of the other stage 1 in and 2 out are all integrally arranged in a meter calibrating device, in addition, the electric meter box further comprises a user electric meter, and the user electric meter is connected with the sampling resistor located at the most end, so as to display the electricity utilization quantity of the user. So divide large-scale power supply system into a plurality of little power supply systems, the school table ware can carry out the school table in grades when carrying out the school table, has reduced the data handling capacity at every turn, can promote computational efficiency, moreover, can weaken the multiple collinearity influence that the custom similarity that the user used the electric quantity caused flow data to calculate to face.

The ammeter case that figure 5 demonstrates has set up the user's ammeter in user's side, and the user's ammeter is used for showing user's power consumption, and the user can learn its power consumption condition through the electric quantity display of user's ammeter, and to a certain extent, provides the convenience for the user. However, at present, the user electric meter is generally arranged at a fixed position of a building, and the user generally cannot see the display of the user electric meter, that is, the electric meter box in the form of fig. 5 has a display function which is not used, and the electric meter box shown in fig. 4 can be popularized to reduce the cost while ensuring the electric quantity detection function.

Wherein, the ammeter case that figure 4 demonstrates does not set up the user's ammeter in user's side, promptly, does not have for being used for providing the function that shows the electric quantity, when the user need acquire its power consumption condition, can establish the connection with corresponding cloud server, acquires its power consumption condition through the network, so, can reduce this part of user's ammeter, also can reduce the installation of user's ammeter moreover, can reduce product cost and installation cost greatly.

Example 3:

with reference to the flow rate measurement system in the foregoing embodiment, this embodiment provides an error checking method for a flow rate measurement system, where the flow rate measurement system includes: the flow array comprises at least two stages of 1 in-out flow arrays, wherein each stage of 1 in-out flow array comprises a flow sensor total table positioned on an incoming line side and n flow sensor sub tables positioned on an outgoing line side, and the flow sensor total table positioned on the incoming line side and the n flow sensor sub tables positioned on the outgoing line side form a relative energy conservation relation; the flow sensor sub-meter positioned on the outlet side in the flow array of the inlet n and the outlet n of the previous stage 1 is a flow sensor general meter positioned on the inlet side in the flow array of the inlet n and the outlet n of the next stage 1 aiming at the flow arrays of the inlet n and the outlet n of the two adjacent stages 1;

referring to fig. 6, the error checking method includes the steps of:

step 10: an error reference standard is specified or established in the flow measurement system and assigned a reference error value.

In this embodiment, in order to calibrate the original data, an error reference standard device needs to be set first, and then the original measurement data needs to be calibrated based on the error reference standard device, so as to eliminate the error and obtain more accurate flow data. There are at least several ways to set the error reference standard device.

The first method is as follows: by using a post calibration method, the determining an error reference standard device, specifically, selecting any one flow sensor in the flow measurement system as the error reference standard device, and obtaining a Δ X deviation between an actual error value of the error reference standard device and the reference error value, as shown in fig. 7, specifically includes:

step 1111: the selected flow sensor is removed from the flow measurement system and an actual error value of the selected flow sensor is measured.

Referring to fig. 1, the flow measurement system includes a large number of flow sensors, where each of the flow arrays for each stage 1 to enter and exit includes (n +1) flow sensors, where one flow sensor general table is used to measure incoming line energy, n flow sensor sub tables are used to measure branching line energy, and the (n +1) flow sensors form a correct network topology relationship, and whether the network topology relationship is correct or not can be determined according to a correlation method.

For the flow array in and out of each stage 1, one flow sensor can be selected from the (n +1) flow sensors as an error reference standard device.

Step 1112: subtracting the reference error value for the selected flow sensor from the actual error value for the selected flow sensor to obtain the Δ X bias.

In an alternative embodiment, a numerical value is automatically designated as the error designated value according to an actual situation, or a numerical value is selected from a standard measurement error interval as the designated value. The specified value may deviate from the actual measurement error of the flow sensor and may not actually reflect the measurement error of the flow sensor. And the difference value of the error designated value of the error reference standard device and the error value of the error reference standard device is equal to the Delta X deviation.

The second method comprises the following steps: by using a series standard method, the error reference standard determining device is specifically configured to connect a first flow sensor with a known actual error value in series on a branch where any one of the flow sensors in the flow measurement system is located, and then calculate a reference measurement error of each flow sensor in the flow measurement system, as shown in fig. 8, the specific flow measurement system includes:

step 1121: and respectively reading the flow data of the first flow sensor and the flow data of the flow sensors on the branches in the running process of the flow measuring system, and calculating the actual error value of the flow sensor on the selected branch.

Step 1122: the flow sensors on the selected branch act as error reference standard devices, and the actual error value of each flow sensor in the flow measurement system is calculated by using the calculated actual error value of the flow sensor on the selected branch.

Compared with the first mode, the second mode is more suitable for the example scene of the specific application, but in the implementation process of the second mode, it is also recommended to arrange an interface for the intervention of the first flow sensor in a certain branch or a plurality of branches of the existing flow measurement system.

The third method comprises the following steps: by adopting a cascade calculation transmission method, the flow measurement system and the adjacent first flow measurement system and/or second flow measurement system can construct a relatively second flow conservation environment, and the error reference standard determining device is specifically a flow sensor with a known actual error value arbitrarily selected from the first flow measurement system and/or the second flow measurement system as the error reference standard device; then, the calculating to obtain the reference measurement error of each flow sensor in the flow measurement system, as shown in fig. 9, specifically includes:

step 1131: and establishing an energy equation according to the second flow conservation environment by using the flow measurement system and each flow sensor in the adjacent first flow measurement system and/or second flow measurement system.

Referring to fig. 10, the flow measurement system to be calibrated includes a multistage 1 in n out flow array, the first flow measurement system also includes a multistage 1 in n out flow array, the flow measurement system to be calibrated and the first flow measurement system belong to a flow measurement system Y (wherein, the flow measurement system Y can be understood as a second flow measurement system, usually observed from a wider range of flow measurement systems), and the flow sensor 0 positioned at the uppermost stage in the flow measurement system to be calibrated, the flow sensor 0' positioned at the uppermost stage in the first quasi flow measurement system and the flow sensor m in the flow measurement system Y form a topological relation between a general table and a sub table, a flow sensor (e.g., flow sensor n') in the first flow measurement system having a known actual error may be selected as the error reference standard. Correspondingly, the relationship between the first flow measurement system, the flow measurement system Y and the flow measurement system may also be as shown in fig. 11, that is, the first flow measurement system may be represented as a single flow sensor 1'. Step 1132: and calculating to obtain the real error of each flow sensor in the flow measurement system according to the actual error value of the error reference standard device.

In this embodiment, according to the neighboring flow measurement system with the known actual error value, the flow sensor with the actual error value in the neighboring flow measurement system may be selected as an error reference standard device, and the reference error value determined according to this method is the actual error value (also described as a real error), so that the actual error value of each flow sensor in the flow measurement system to be measured can be calculated based on the flow measurement system to be measured and the neighboring first flow measurement system and/or second flow measurement system that can construct a relatively conservative environment with respect to the second flow.

In the third mode, when the error reference standard device is set, the measurement error of each flow sensor obtained in the following step 12 is the actual error value of each flow sensor, and after the corresponding raw data is calibrated through the actual error value, error-free flow data can be obtained. In general, the third of the three ways is the most intelligent, but the specific implementation also puts higher requirements on the architectural relationship, data sharing and computing capability of each flow measurement system in the current environment.

The method is as follows: a standard sharing mode is adopted, a known or unknown error flow sensor is connected in series into any branch pipeline of 1 flow array with 1 inlet and n outlets, the branch pipeline is used as an error reference standard device, and the error calculation of the flow sensor corresponding to the 1 inlet and n outlet flow array can be completed. Then, the same known or unknown error flow sensor is connected in series to any branch pipeline in the adjacent 1 flow array with 1 in n out through pipeline switching, and the branch pipeline is used as an error reference standard device, so that the error calculation of the flow sensor of the adjacent 1 in n out flow array can be completed. By sharing the standard method, error magnitude transfer between 2 independent 1 in n out flow arrays can be used.

Specifically, the flow measurement system comprises a first 1 in n out flow array and a second 1 in n out flow array, wherein the first 1 in n out flow array and the second 1 in n out flow array are independent of each other, that is, the first 1 in n out flow array belongs to one flow measurement system, and the second 1 in n out flow array belongs to the other flow measurement system; the flow measuring system also comprises an error reference standard device, the error reference standard device is arranged on a pipeline branch of the first 1 in n out flow array, the error reference standard device is also arranged on a pipeline branch of the second 1 in n out flow array, and a switch is arranged on the selected pipeline branch; wherein a pipeline branch into which the error reference standard device is connected in series is switched by setting a state of a switch to selectively connect the error reference standard device in series to the first 1 in n out flow array or the second 1 in n out flow array.

In this embodiment, the error calibration of two independent 1 in n out flow arrays can be completed by one error reference standard device, and the normal operation of each other is not affected.

In other ways, a calibration table may also be incorporated into the flow measurement system, which acts as an error reference calibration device. The setting manner of the error reference standard device is selected according to actual conditions, and is not particularly limited herein.

Step 11: and acquiring raw measurement data of flow sensors on all input branches and all output branches in the flow measurement system and raw measurement data of the error reference standard device.

In this embodiment, raw measurement data of the individual flow sensors may be automatically collected by the concentrator and communicated to the database server. Wherein, because the flow sensor has an error, the raw measurement data has an error accordingly.

Step 12: and calculating the reference measurement error value of the flow sensor in the 1 in n out flow array in which the error reference standard device is positioned by utilizing the relative energy conservation relation aiming at the 1 in n out flow array in which the error reference standard device is positioned.

In this embodiment, a cascade progressive calculation mode may be adopted to transfer the reference error value, so that the scale of data calculation may be reduced, the calculation efficiency may be improved, and the problem of co-linearity caused by the similarity of user traffic data may be reduced.

Step 13: and acquiring a flow array which has a relation of the flow sensor which is calculated to obtain a reference measurement error value and is in the inlet-to-n outlet relation of the previous stage or the next stage 1, and calculating the reference measurement error value of the flow sensor in the flow array corresponding to the inlet-to-n outlet relation of the previous stage or the next stage 1 by utilizing the relative energy conservation relation.

Step 14: and calculating the reference measurement error value process of the flow sensors in the flow array with 1 inlet and n outlets by one or more times through the previous stage or the next stage, thereby obtaining the reference measurement error values of all the flow sensors in the flow measurement system, and compensating the original measurement data according to the reference measurement error value of each flow sensor to obtain equal error data or error-free data.

In this embodiment, the original measurement data corresponding to the reference measurement error value is compensated by using the reference measurement error value to obtain equal error data of the reference error value of each flow sensor relative to the error reference standard device; when delta X deviation exists between a real error value and a reference error value of the error reference standard device, compensating equal error data of each corresponding flow sensor by utilizing the delta X deviation to obtain error-free data; or, directly calculating to obtain error-free data corresponding to each flow sensor according to the real error value of the error reference standard device.

In the embodiment of the present invention, in order to improve the accuracy of the calculation, a line loss parameter variable may be further provided, but for indirect consideration of description, the line loss parameter variable is not introduced in the following detailed description process. Specifically, the following method may be adopted to obtain the measurement error of each flow sensor. Here, a flow sensor is taken as an example of an electric energy flow device.

For a power supply system with m power supply lines and n consumers consuming power, the flow measurement system comprises at least (m + n) flow sensors, and the electrical energy (flow data) flowing through the flow measurement system complies with the law of conservation of relative flow, namely: the sum of the input electric energy is the sum of the electric energy consumed by the user.

In this embodiment, a relative flow conservation relation is established according to a first formula, where the first formula specifically is:

wherein, W_iRaw measurement data, X, of a flow sensor representing the ith incoming line_iThe measurement error of the flow sensor of the ith incoming line is represented; w_jRaw measurement data, X, of a flow sensor representing the jth outgoing line_jIndicating the measurement error of the flow sensor of the j-th outgoing line. The meaning of the relative flow conservation relation here is, for example, that electric energy is: it is common to attribute the line loss between the flow sensors to the error of the power sensors, thereby forming a relative flow gateIdentity.

Then, the raw measurement data corresponding to the error reference standard device, the reference error value corresponding to the error reference standard device and the raw measurement data of other flow sensors are substituted into a formula I to obtain the measurement error of each flow sensor.

After each flow sensor is compensated with a reference measurement error, the errors between the resulting compensated flow data and the actual flow data are all equal to the Δ X deviation (i.e., equal deviation). That is, the (m + n) flow data at any one time point given by the flow measurement system will have a same error. This Δ X deviation is an equal error, which is the error of the error reference standard itself in the error measurement method. This means that the equal error of the error reference standard device is detected using any method, and the error value of the remaining (m + n-1) data is also known, thereby obtaining the true value (error-free data) of the power value.

Therefore, when the error reference standard devices are arranged in different ways, the data calibration method corresponding to the step 12 also has a difference.

When the second mode is adopted to set an error reference standard device or directly quote a standard table as the error reference standard device, the measurement error of each flow sensor in the flow measurement system is obtained based on the error reference standard device, the measurement error is the actual error value of each flow sensor, and then the corresponding original measurement data is calibrated based on the actual error value of each flow sensor to obtain error-free data.

When the error reference standard device is selected in the above manner, the measurement error of each flow sensor in the flow measurement system is obtained based on the error reference standard device, where the measurement error is a reference measurement error of each flow sensor and may not be equal to an actual error value. The original measurement data is calibrated according to the reference measurement error to obtain compensated flow data, and for the flow measurement system, the compensated flow data corresponding to each flow sensor is equal error data, and error-free data can be obtained after the equal errors need to be eliminated.

Due to the equal error theory, the actual error value of each flow sensor minus its reference measurement error is correspondingly equal to the Δ X deviation. Therefore, a flow sensor can be selected at will to obtain an actual error value thereof so as to obtain the Δ X deviation of the flow measurement system, thereby calibrating the compensated flow data of other flow sensors to obtain error-free flow data.

In this embodiment, after the Δ X deviation is obtained, the compensated flow data of each flow sensor is calibrated according to the Δ X deviation to obtain error-free flow data of each flow sensor, where the error-free flow data is data with no error theoretically or data with negligible error.

Example 4:

in an actual application scenario, the embodiment divides a large-scale flow measurement system into a plurality of 1-in n-out flow arrays, and mainly aims to reduce the collinearity problem caused by the similarity of flow data of users. When the flow data of the user does not have the similarity problem, the error of each flow sensor can be directly calculated according to a traditional mode to verify the original measurement data, another optional scheme is provided based on the actual use condition of the user, the processor can selectively select any mode to calculate according to the actual data scale, and the calculation flexibility is improved.

Specifically, the implementation of the present embodiment is as follows:

after the raw measurement data of the flow sensor are collected, determining the similarity of each raw measurement data, for example, determining the similarity of each raw measurement data in a curve or histogram drawing manner, wherein if two groups of raw measurement data are substantially equal, it indicates that the similarity of the two groups of raw measurement data is extremely high, which may cause a co-linearity problem; if the two groups of original measurement data are not basically equal, the similarity of the original measurement data is not high, and the problem of co-linearity is basically not caused.

In the actual calculation process, if the similarity of at least two sets of raw measurement data is greater than the preset similarity threshold, the measurement errors of the flow sensors are calculated in a cascade manner in a hierarchical calculation manner, so as to verify the raw measurement data (i.e., the manner corresponding to embodiment 3).

If the similarity of each group of original measurement data is smaller than a preset similarity threshold, the flow sensors in the flow array at the last stage 1 inlet and outlet are divided into tables, and the flow sensors in the flow array at the top stage 1 inlet and outlet are summed up to obtain the measurement errors of the corresponding flow sensors by using the relative energy conservation relation, so as to check the original measurement data. Namely, an energy conservation formula is directly established between the flow sensor general table in the flow array positioned at the top stage 1 in/n out and the flow sensor sub table in the flow array positioned at the last stage 1 in/n out, and the error of the corresponding flow sensor is determined so as to calibrate the original measurement data.

Based on this, the error reference standard device generally selects a pipeline where the flow sensor sub-meter in the last stage 1 in/n out flow array is located, or selects a certain flow sensor sub-meter in the last stage 1 in/n out flow array as the error reference standard device. Then, the original measurement data is compensated according to the same error compensation method to obtain error-free data.

Example 5:

fig. 12 is a schematic structural diagram of an error calibration apparatus according to an embodiment of the present invention. The error calibration apparatus of the present embodiment includes one or more processors 41 and a memory 42. In fig. 12, one processor 41 is taken as an example.

The processor 41 and the memory 42 may be connected by a bus or other means, and fig. 12 illustrates the connection by a bus as an example.

The memory 42, as a non-volatile computer-readable storage medium for storing an error calibration method, may be used to store non-volatile software programs and non-volatile computer-executable programs, such as the error calibration methods in embodiments 1-6. The processor 41 executes the error calibration method by executing non-volatile software programs and instructions stored in the memory 42.

The memory 42 may include high speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, memory 42 may optionally include memory located remotely from processor 41, which may be connected to processor 41 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

It should be noted that, for the information interaction, execution process and other contents between the modules and units in the apparatus and system, the specific contents may refer to the description in the embodiment of the method of the present invention because the same concept is used as the embodiment of the processing method of the present invention, and are not described herein again.

Those of ordinary skill in the art will appreciate that all or part of the steps of the various methods of the embodiments may be implemented by associated hardware as instructed by a program, which may be stored on a computer-readable storage medium, which may include: a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and the like.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.