阅读说明：本技术 基于零流量识别降低超声波表功耗及零流量校准的方法 (Method for reducing ultrasonic meter power consumption based on zero flow identification and zero flow calibration ) 是由 贾忠友 李中华 刘义 罗彩萍 于 2021-08-20 设计创作，主要内容包括：本发明涉及基于零流量识别降低超声波表功耗及零流量校准的方法,所述超声波表内部的通道为U型管道,包括以下步骤：获取U型管道的压力数据,判断通道内是否有燃气流量；当通道内有燃气流量时,开启超声波计量模块的供电电源,否则关闭供电电源。本发明通过判断管道内有无流量,从而在管道内无流量时,关闭内置电源,节省系统功耗。(The invention relates to a method for reducing power consumption of an ultrasonic meter and calibrating zero flow based on zero flow identification, wherein a channel inside the ultrasonic meter is a U-shaped pipeline, and the method comprises the following steps: acquiring pressure data of the U-shaped pipeline, and judging whether the gas flow exists in the channel; and when the gas flow exists in the channel, the power supply of the ultrasonic metering module is started, otherwise, the power supply is closed. According to the invention, the flow in the pipeline is judged, so that the built-in power supply is turned off when the flow in the pipeline is not available, and the power consumption of the system is saved.)

1. The method for reducing the power consumption of the ultrasonic meter and calibrating the zero flow based on the zero flow identification is characterized in that the channel inside the ultrasonic meter is a U-shaped pipeline: the method comprises the following steps:

acquiring pressure data of the U-shaped pipeline, and judging whether the gas flow exists in the channel;

and when the gas flow exists in the channel, the power supply of the ultrasonic metering module is started, otherwise, the power supply is closed.

2. The method for reducing power consumption of an ultrasonic meter and zero flow calibration based on zero flow identification of claim 1, wherein: the step of obtaining the pressure data of the U-shaped pipeline and judging whether the gas flow exists in the channel comprises the following steps:

a first pressure sensor is arranged at an air inlet of the U-shaped pipeline, and a second pressure sensor is arranged at an air outlet of the U-shaped pipeline; acquiring data of a first pressure sensor and a second pressure sensor at the same time, and calculating the pressure difference between an air inlet and an air outlet of the U-shaped pipeline;

if the pressure difference exceeds a set threshold, judging that the gas flow exists in the channel; and if the pressure difference does not exceed the set threshold, judging that the gas flow does not exist in the channel.

3. The method for reducing power consumption of an ultrasonic meter and zero flow calibration based on zero flow identification as claimed in claim 2, wherein: and acquiring data of the first pressure sensor and the second pressure sensor at the same time, and subtracting the pressure data of the second pressure sensor from the pressure data of the first pressure sensor so as to calculate the difference value between the air inlet and the air outlet of the U-shaped pipeline.

4. The method for reducing power consumption of an ultrasonic meter and zero flow calibration based on zero flow identification of claim 1, wherein: and determining a threshold value according to the flow range and the pipe diameter of the U-shaped pipeline.

5. The method for reducing power consumption of an ultrasonic meter and zero flow calibration based on zero flow identification of claim 1, wherein: when judging that the gas flow does not exist in the channel, before closing the power supply of the ultrasonic metering module, the method also comprises the following steps:

temporarily starting a flow detection module to obtain the output flow data of the current U-shaped pipeline detected by the flow detection module; and if the output flow is not 0, automatically adjusting the parameters of the flow detection module.

Technical Field

The invention relates to the technical field of reducing power consumption of a gas meter, in particular to a method for reducing power consumption of an ultrasonic meter and zero flow calibration based on zero flow identification.

Background

Compared with the traditional diaphragm meter, the ultrasonic gas meter has the advantages of high precision, wide measuring range, high reliability, small pressure loss and the like, and has become a development trend in the field of urban gas metering. At present, the ultrasonic gas meter generally adopts a built-in battery to supply power to the ultrasonic metering module, and if the electric quantity of the built-in battery is used up, the ultrasonic gas meter cannot meter. Therefore, how to reduce the power consumption of the ultrasonic gas meter has great significance for the operation of the ultrasonic gas meter.

According to the gas use characteristics of a user, most of time has no gas flow, if the channel can be detected to be in a no-flow state, when the channel is detected to be in the no-flow state, the power supply of the metering module is turned off, the ultrasonic gas meter can be enabled to be in a mode with extremely low power consumption, and the service life of a built-in battery can be greatly prolonged. However, when the ultrasonic waves are affected by factors such as temperature, gas components and gas impurities, the detection module for detecting the flow in the pipeline may have zero flow drift, so that the metering accuracy of the detection module is affected, and whether the channel is in a no-flow state at the end cannot be accurately judged.

Disclosure of Invention

The invention aims to solve the following two technical problems, firstly, the built-in power supply is closed when no flow exists in the pipeline by judging whether the flow exists in the pipeline or not, so that the power consumption of the system is saved; and secondly, judging whether the flow exists in the pipeline or not, and automatically adjusting parameters of a module for detecting the flow, so that the module for detecting the flow can improve the accuracy of flow measurement, and the method for reducing the power consumption of the ultrasonic meter and calibrating the zero flow based on zero flow identification is provided.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

the method for reducing the power consumption of the ultrasonic meter and calibrating the zero flow based on the zero flow identification is characterized in that the channel inside the ultrasonic meter is a U-shaped pipeline: the method comprises the following steps:

acquiring pressure data of the U-shaped pipeline, and judging whether the gas flow exists in the channel;

and when the gas flow exists in the channel, the power supply of the ultrasonic metering module is started, otherwise, the power supply is closed.

In an actual situation, when the ultrasonic waves are influenced by factors such as temperature, gas components and gas impurities, the detection module specially used for detecting the flow in the pipeline can generate a zero flow drifting condition, so that whether the flow exists in the pipeline or not is judged by detecting the pressure difference value of the gas inlet and the gas outlet of the pipeline, and the power supply is turned off when the flow does not exist, so that the first technical problem of the invention is solved, and the power consumption of the system is saved.

The step of obtaining the pressure data of the U-shaped pipeline and judging whether the gas flow exists in the channel comprises the following steps:

a first pressure sensor is arranged at an air inlet of the U-shaped pipeline, and a second pressure sensor is arranged at an air outlet of the U-shaped pipeline; acquiring data of a first pressure sensor and a second pressure sensor at the same time, and calculating the pressure difference between an air inlet and an air outlet of the U-shaped pipeline;

if the pressure difference exceeds a set threshold, judging that the gas flow exists in the channel; and if the pressure difference does not exceed the set threshold, judging that the gas flow does not exist in the channel.

The pressure difference value of the pipeline passageway and the gas velocity of flow are in a linear direct proportion relation, and the pressure of air inlet is bigger than the pressure of air outlet, that is to say, there is the flow in the pipeline, and the velocity of flow of gas flow is bigger, and the pressure difference value of pipeline passageway then can be bigger. Because the ultrasonic gas meters all have a start flow, after the gas is introduced into the pipeline, the flow in the pipeline will exceed the start flow, and then the pressure at the inlet and outlet of the pipeline will have a difference value.

And acquiring data of the first pressure sensor and the second pressure sensor at the same time, and subtracting the pressure data of the second pressure sensor from the pressure data of the first pressure sensor so as to calculate the difference value between the air inlet and the air outlet of the U-shaped pipeline.

And determining a threshold value according to the flow range and the pipe diameter of the U-shaped pipeline.

When judging that the gas flow does not exist in the channel, before closing the power supply of the ultrasonic metering module, the method also comprises the following steps:

temporarily starting a flow detection module to obtain the output flow data of the current U-shaped pipeline detected by the flow detection module; and if the output flow is not 0, automatically adjusting the parameters of the flow detection module.

Because the special flow detection module can generate zero drift under the influence of some factors, and the gas meter measures the gas usage through the flow detection module, the output flow data detected by the flow detection module can be checked to be 0 when no flow in the pipeline is judged every time, and if the output flow data is not 0, the error is generated by the flow detection module, so that the parameters of the flow detection module are automatically adjusted at the moment, the second technical problem of the invention is solved, and the measurement precision of the flow detection module is improved.

Compared with the prior art, the invention has the beneficial effects that:

(1) by judging whether the flow exists in the pipeline or not, the built-in power supply is turned off when the flow does not exist in the pipeline, and the power consumption of the system is saved;

(2) the parameters of the module for detecting the flow are automatically adjusted by judging whether the flow exists in the pipeline or not, so that the module for detecting the flow can improve the accuracy of measuring the flow.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic view of a U-shaped pipe structure according to the present invention;

FIG. 2 is a flow chart of the present invention.

Description of the main elements

The system comprises a first pressure sensor 1, a second pressure sensor 2 and a flow detection module 3.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Also, in the description of the present invention, the terms "first", "second", and the like are used for distinguishing between descriptions and not necessarily for describing a relative importance or implying any actual relationship or order between such entities or operations.

Example (b):

the invention is realized by the following technical scheme, as shown in figure 1, the method for reducing the power consumption of the ultrasonic meter and calibrating the zero flow based on the zero flow identification comprises the following steps:

step S1: and acquiring pressure data of the U-shaped pipeline, and judging whether the gas flow exists in the channel.

A first pressure sensor is arranged at an air inlet of the U-shaped pipeline, and a second pressure sensor is arranged at an air outlet of the U-shaped pipeline; and acquiring data of the first pressure sensor and the second pressure sensor at the same time, and calculating the pressure difference between the air inlet and the air outlet of the U-shaped pipeline.

The pressure difference value of the pipeline passageway and the gas velocity of flow are in a linear direct proportion relation, and the pressure of air inlet is bigger than the pressure of air outlet, that is to say, there is the flow in the pipeline, and the velocity of flow of gas flow is bigger, and the pressure difference value of pipeline passageway then can be bigger. Because the ultrasonic gas meters all have a start flow, after the gas is introduced into the pipeline, the flow in the pipeline will exceed the start flow, and then the pressure at the inlet and outlet of the pipeline will have a difference value.

Therefore, setting a threshold value, calculating the relationship between the pressure difference between the air inlet and the air outlet and the threshold value, and determining whether the flow exists in the pipeline, wherein the threshold value is set according to the flow range and the pipe diameter of the pipeline, and can be set according to the actual situation, which is not repeated herein.

Assuming that the pressure value of the air inlet detected by the first pressure sensor is P1, the pressure value of the air outlet detected by the second pressure sensor is P2, and the set threshold value is Δ P. When P1-P2 is not less than delta P, the gas flow in the channel is indicated; when P1-P2 <. DELTA.P, no gas flow in the passage is indicated.

Step S2: and when the gas flow exists in the channel, the power supply of the ultrasonic metering module is started, otherwise, the power supply is closed.

When the gas flow is judged not to exist in the channel, the power supply of the metering module can be closed, so that the power consumption of the whole system is reduced. When the gas flow in the channel is detected, the power supply of the metering module is quickly started.

The gas flow is not in the detection channel, the flow detection module can be started for a short time before the power supply is required to be turned off, at the moment, if the flow detection module detects that the output flow data of the U-shaped pipeline is not 0, the error of the measurement data of the flow detection module is explained, and at the moment, the parameter of the flow detection module is automatically adjusted, so that the flow detection module detects that the flow data is 0.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.