阅读说明：本技术 一种高精度小流量渗流量自动测量方法 (High-precision small-flow seepage automatic measurement method ) 是由 *** 葛从兵 王士军 张国栋 谷艳昌 陈剑 王宏 黄海兵 严吉皞 吴云星 庞琼 于 2020-07-23 设计创作，主要内容包括：本发明公开一种高精度小流量渗流量自动测量方法,对小流量渗流量实现自动化测量,通过切换控制阀装置,实现测量的自动切换；通过翻斗体来计量水量,翻斗体的翻转转换成电脉冲,实现自动采集；通过提高精度测量方法例如对脉冲信号的测量采取中断方式,实现对小流量的准确测量,通过自动测量方式,可以实现定时测量、连续测量和根据指令测量。(The invention discloses a high-precision small-flow seepage automatic measurement method, which realizes automatic measurement of small-flow seepage, and realizes automatic switching of measurement by switching a control valve device; the water quantity is measured through the bucket tipping body, and the tipping of the bucket tipping body is converted into electric pulses to realize automatic acquisition; the accurate measurement of the small flow is realized by improving the precision measurement method, for example, adopting an interruption mode for the measurement of the pulse signal, and the timing measurement, the continuous measurement and the measurement according to the instruction can be realized by an automatic measurement mode.)

1. A high-precision small-flow seepage automatic measuring method is characterized by comprising the following steps:

s1, arranging the flow measuring device at a water leakage point; the flow measuring device comprises a leakage water collecting pipe device, a tipping bucket measuring device, a signal transmission device, a control valve device and a processor device, wherein the leakage water collecting pipe device comprises a collecting port, a first water outlet port and a second water outlet port, the second water outlet port is connected with the tipping bucket measuring device, the tipping bucket measuring device comprises a measuring box body, a water inlet funnel, a tipping bucket body, a tipping bucket supporting column, a first limiting block and a second limiting block are arranged in the measuring box body, a third water outlet port and a fourth water outlet port are respectively arranged at positions of the measuring box body corresponding to the first limiting block and the second limiting block, a reed pipe device is arranged on the tipping bucket supporting column, a magnet is arranged on the tipping bucket body, the control valve device comprises a first control valve, a second control valve and an electromagnetic valve controller, wherein the first control valve is arranged at the first water outlet port, the second control valve is provided with the second water outlet port, the processor device is respectively connected with the signal transmission device, the control valve device and the reed pipe device;

s2, determining measurement parameters: when the tipping body is turned, the reed pipe device and the magnet generate a pulse signal after a first suction and disconnection state, and the pulse signal is sent out to represent that the tipping body is turned once to generate a bucket of water;

s2, when the timing measurement time is reached or a measurement command is received, controlling the control valve device through the control processor device to enable the first control valve to be in a closed state and enable the second control valve to be in an open state;

s3, when the dump body turns to the Nth pulse signal, namely water flow is stable, timing measurement is started, the dump body continues to keep a turning state, when the Mth pulse signal is measured in an accumulated mode, measurement is finished, and meanwhile the processor device is controlled to control the control valve device, so that the second control valve is in a closed state, and the first control valve is in an open state;

s4, calculating flow: setting the measuring time as T and the unit as s, setting the water volume of one bucket of the bucket overturning body as Q and the unit as L, and calculating the formula as follows:wherein q is flow and the unit is L/s;

and S5, sending the result after the measurement to the monitoring station through a signal transmission device.

2. The method of claim 1, wherein the method comprises the steps of: in S1, the funnel of intaking is located the upper end of the bucket body that turns over, turns over the bucket body and rotates with the tipping bucket support column to be connected, the bucket body includes two chambers, two chambers are the triangle-shaped cube of two symmetries, third play water port and fourth play water port correspond the delivery port position of two chambers respectively, first stopper and second stopper are equipped with the bottom of the delivery port position of two chambers respectively.

3. The method of claim 2, wherein the method comprises the following steps: in S1, the reed switch device includes two double reed switches and two reed switch plates, the number of the magnets is two and the magnets are respectively arranged on the side walls of the two bucket chambers, the two reed switch plates are respectively arranged on the two sides of the bucket supporting column, the double reed switches are respectively arranged on the two reed switch plates, the double reed switches include two single reed switches which are arranged in a staggered manner, and the double reed switches are arranged at the middle points of the circular paths crossed by the movement of the magnets when the bucket chambers of the bucket body are overturned.

4. The method of claim 1, wherein the method comprises the steps of: in S3, M-N is greater than or equal to 10, and the larger the M-N difference is, the higher the precision is.

5. The method of claim 1, wherein the method comprises the steps of: the processor device comprises a signal acquisition module, a data processing module and an external clock module, and the signal transmission device comprises a GPRS module.

6. The method of claim 1, wherein the method comprises the steps of: at S3, taking an interrupt mode for the measurement of the pulse signal, the processor device including a clock source, an n-bit timer, an m-bit timer, and a data processing unit; the overflow pulse of n-bit counter in said timer is used as working clock of counter in another m-bit timer, at the same time, the pulse signal to be measured is simultaneously connected to input ends of capturers in two timers, so that under the trigger of edge of pulse signal the two capturers can be used for simultaneously capturing correspondent time value, so that the time value under the working clock with frequency F0 and another frequency F1 ═ F0/2 can be obtainedⁿAs the high order time value of the operating clock.

Technical Field

The invention relates to the field of dam seepage monitoring, in particular to a high-precision small-flow seepage automatic measuring method.

Background

The seepage flow monitoring is an important content of dam seepage flow monitoring, generally speaking, when the seepage flow is 1L/s-300L/s, automatic monitoring can be carried out by a triangular weir or a rectangular weir, but when the seepage flow is less than 1L/s, a volumetric method is generally adopted for measurement according to the specification requirement, and the volumetric method can only be manually used for measurement. The manual measurement has low measurement precision, consumes time and labor, is not timely in measurement, has low measurement frequency, and cannot timely find the abnormal change of the seepage quantity. Therefore, the method is an important content of dam monitoring because the seepage change must be measured accurately in time, realizes automation of small-flow seepage monitoring, and is necessary for perfecting and supplementing the dam safety automatic monitoring.

The seepage flow is small and is easy to be ignored by managers, manual measurement is rarely carried out or no measurement is carried out at all, the slight change of the seepage flow reflects the correlation condition of factors such as reservoir level, dam body seepage and the like, the correlation of the information can be obtained through long-term monitoring, the change rule of the dam body seepage of the dam can be deeply sensed from a more refined angle, and a basis and important supplement are provided for dam safety management and scheduling.

At present, the flow of a small-flow water weir is mainly measured in a manual mode, and the specific mode is as follows: and when the collection time is up, the collection is stopped, the collected leakage water amount is measured, and the leakage flow is calculated.

In this way, a measuring person is required to go to the site, the measuring cylinder is used for collecting leakage water, the leakage water can be collected generally once a week or a month, each time lasts only a few minutes to about an hour, and other time periods are blank for monitoring, so that the measurement data of the time period cannot be obtained. In addition, the labor intensity of manual measurement is high, the measurement precision is influenced by human factors, the measurement precision is low, and the measurement is not timely.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to provide a high-precision small-flow seepage automatic measuring method which can automatically measure in high precision and all weather and constantly monitor the change of flow aiming at the defects of the prior art.

The technical scheme is as follows: the invention comprises the following steps:

s1, arranging the flow measuring device at a water leakage point; the flow measuring device comprises a leakage water collecting pipe device, a tipping bucket measuring device, a signal transmission device, a control valve device and a processor device, wherein the leakage water collecting pipe device comprises a collecting port, a first water outlet port and a second water outlet port, the second water outlet port is connected with the tipping bucket measuring device, the tipping bucket measuring device comprises a measuring box body, a water inlet funnel, a tipping bucket body, a tipping bucket supporting column, a first limiting block and a second limiting block are arranged in the measuring box body, a third water outlet port and a fourth water outlet port are respectively arranged at positions of the measuring box body corresponding to the first limiting block and the second limiting block, a reed pipe device is arranged on the tipping bucket supporting column, a magnet is arranged on the tipping bucket body, the control valve device comprises a first control valve, a second control valve and an electromagnetic valve controller, wherein the first control valve is arranged at the first water outlet port, the second control valve is provided with the second water outlet port, the processor device is respectively connected with the signal transmission device, the control valve device and the reed pipe device; the processor device comprises a signal acquisition module, a data processing module and an external clock module, and the signal transmission device comprises a GPRS module;

s2, determining measurement parameters: when the tipping body is turned, the reed pipe device and the magnet generate a pulse signal after a first suction and disconnection state, and the pulse signal is sent out to represent that the tipping body is turned once to generate a bucket of water;

s2, when the timing measurement time is reached or a measurement command is received, controlling the control valve device through the control processor device to enable the first control valve to be in a closed state and enable the second control valve to be in an open state;

s3, when the dump body turns to the Nth pulse signal, namely water flow is stable, timing measurement is started, the dump body continues to keep a turning state, when the Mth pulse signal is measured in an accumulated mode, measurement is finished, and meanwhile the processor device is controlled to control the control valve device, so that the second control valve is in a closed state, and the first control valve is in an open state;

s4, calculating flow: setting the measuring time as T and the unit as s, setting the water volume of one bucket of the bucket overturning body as Q and the unit as L, and calculating the formula as follows:wherein q is flow and the unit is L/s;

and S5, sending the result after the measurement to the monitoring station through a signal transmission device.

As a further improvement of the present invention, in S1, the water inlet funnel is located at an upper end of the tipping body, the tipping body is rotatably connected to the tipping body support column, the tipping body includes two bucket chambers, the two bucket chambers are two symmetrical triangular cubes, the third water outlet port and the fourth water outlet port respectively correspond to water outlet positions of the two bucket chambers, and the first limiting block and the second limiting block are respectively provided with bottoms of the water outlet positions of the two bucket chambers.

As a further improvement of the present invention, in S1, the reed pipe device includes two double reed pipes and two reed pipe plates, the two double reed pipes are two magnets and are respectively disposed on the side walls of the two bucket chambers, the two reed pipe plates are respectively disposed on two sides of the bucket supporting column, the double reed pipes are respectively disposed on the two reed pipe plates, the double reed pipes include two single reed pipes disposed in a staggered manner, and the double reed pipes are mounted at the middle point of the circular path crossed by the movement of the magnets when the bucket chamber of the tipping body tips over.

As a further improvement of the present invention, in S3, M-N ≧ 10, the greater the M-N difference, the higher the precision, and the parameters M and N can be changed by command.

As a further improvement of the invention, the processor device comprises a signal acquisition module, a data processing module and an external clock module, and the signal transmission device comprises a GPRS module.

As a further improvement of the present invention, in S3, the measurement of the pulse signal is in an interrupt mode, and the processor device includes a clock source, an n-bit timer, an m-bit timer, and a data processing unit; the overflow pulse of n-bit counter in the timer is used as the working clock of the counter in another m-bit timer, and at the same time, the pulse signal to be measured is simultaneously connected to the input ends of the capturers in two timers, so that under the trigger of the edge of the pulse signal, the two capturers can simultaneously capture the corresponding time value, i.e. the time value under the working clock with frequency F0 and the other frequency F1 ═ F0/2n can be obtained as the high-order time value of the working clock.

Has the advantages that:

(1) the core of the method is to realize automatic measurement of the small-flow seepage;

(2) the automatic switching of measurement is realized by switching the control valve device;

(3) the water quantity is measured through the bucket tipping body, and the tipping body is turned over to be converted into electric pulses to realize automatic collection;

(4) and accurate measurement of small flow is realized by improving a precision measurement method, for example, adopting an interruption mode for measurement of pulse signals.

(5) By means of automatic measurement, timing measurement, continuous measurement and measurement according to instructions can be achieved.

Drawings

Fig. 1 is a structural view of a dump body measuring apparatus according to the present invention.

Fig. 2 is a connection diagram of a control module of the flow rate measurement device of the present invention.

Detailed Description

The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the embodiments.