CN108572016A - A kind of time service optoacoustic open channel flow rate meter systems - Google Patents
A kind of time service optoacoustic open channel flow rate meter systems Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 101
- 238000004891 communication Methods 0.000 claims abstract description 11
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- 238000005259 measurement Methods 0.000 claims description 11
- 230000008054 signal transmission Effects 0.000 claims description 8
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/002—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow wherein the flow is in an open channel
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
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Abstract
The present invention relates to a kind of time service optoacoustic open channel flow rate meter systems, main control module sends instructions to driving circuit, driving circuit controls ultrasonic transducer transmitting according to the instruction of reception and receives ultrasonic pulse signal, and clock synchronization module emits ultrasonic transducer and receives ultrasonic pulse signal and carries out timing；Signal adapter receives electronics pulse signal, and is sent to main control module；After main control module receives the timing result of clock synchronization module, calculates after sending and receiving the propagation time difference of ultrasonic pulse signal, be sent to communication module together, so that flowmeter determines water velocity according to propagation time difference；Further include that laser scanner is used under laser scanning open channel section and section situation of change of depositing, obtains cross-sectional area and constitute initial flow with flow velocity；The influence that ultrasonic anerovane is used to measure wind direction and wind velocity size and water surface stormy waves relationship and calculate wind direction and wind velocity to flow；Rainfall gauge is used to calculate water surface rainfall and slope surface generation to the water of open channel.
Description
Technical Field
The invention belongs to the field of water flow measurement, and particularly relates to a time service photoacoustic open channel flowmeter system.
Background
At present, the time difference method ultrasonic open channel flow meter is characterized in that a certain angle is formed between one side of an open channel and the other side of the open channel through an ultrasonic transducer, signals are transmitted by connecting cables, the flow velocity is calculated according to the time difference generated by the passing of water flow, and the unit flow is obtained by multiplying the flow velocity by the cross section of a river. Because the transmission loss of signals in the cable is large, the ultra-wide open channel cannot be measured, potential safety hazards exist in the air for cable erection or river bottom laying, and the time-difference ultrasonic open channel flowmeter can only be used in an open channel of about 10 meters generally.
Monophony is generally used in the market for metering, and the metering is inaccurate and has large error due to different flow velocities of water flow at different depths. Meanwhile, when the ultrasonic transducer is damaged in the using process, the metering is stopped, and the loss can be caused.
Disclosure of Invention
In order to solve the problems, the invention provides a time service photoacoustic open channel flow meter system.
The invention provides a time service photoacoustic open channel flowmeter system which comprises a main control device, a driving circuit, at least one pair of ultrasonic transducers and a signal converter, wherein the main control device comprises a main control circuit, a driving circuit, a pair of ultrasonic transducers and a signal converter; the master control device comprises a master control module, a clock synchronization module and a communication module; the pair of ultrasonic transducers comprises a first ultrasonic transducer and a second ultrasonic transducer and is used for sending and receiving ultrasonic pulse signals; the first ultrasonic transducer transmits an ultrasonic pulse signal to the second ultrasonic transducer, the second ultrasonic transducer receives the ultrasonic pulse signal and transmits the ultrasonic pulse signal along the water flow direction, and then the second ultrasonic transducer transmits the ultrasonic pulse signal to the first ultrasonic transducer, the first ultrasonic transducer receives the ultrasonic pulse signal and transmits the ultrasonic pulse signal along the reverse water flow direction; the master control module sends an instruction to the driving circuit, the driving circuit controls the pair of ultrasonic transducers to transmit and receive ultrasonic pulse signals according to the received instruction, and meanwhile, the clock synchronization module times the pair of ultrasonic pulse signals transmitted and received by the pair of ultrasonic transducers; the signal converter converts the electronic pulse signals sent by the pair of ultrasonic transducers into digital signals after receiving the electronic pulse signals, and sends the digital signals to the main control module; and after the main control module receives the timing result of the clock synchronization module, the propagation time difference of the ultrasonic pulse signals sent and received by the pair of ultrasonic transducers is calculated and then is sent to the communication module together, so that the flowmeter determines the water flow speed according to the propagation time difference.
Preferably, the method further comprises the following steps: the main control module starts or controls the laser scanners to scan the open channel section and the change conditions of siltation, collapse or blockage under the section, so that the area S of the open channel section is obtained.
Preferably, the at least one pair of ultrasonic transducers are sequentially arranged from the river bottom to the river surface, an included angle between a connecting line of the first ultrasonic transducer and the second ultrasonic transducer and the water flow direction is theta, and 0 degrees < theta <180 degrees.
Preferably, the main control module is specifically configured to: calculating forward water flow forward propagation time difference T between the ultrasonic pulse signal transmitted by the first ultrasonic transducer of the pair of ultrasonic transducers and the ultrasonic pulse signal received by the second ultrasonic transduceri1(ii) a Calculating the reverse water flow reverse propagation time difference T between the ultrasonic pulse signal transmitted by the second ultrasonic transducer of the pair of ultrasonic transducers and the ultrasonic pulse signal received by the first ultrasonic transduceri2。
PreferablyThe method also comprises the following steps: a signal transmitting center for receiving the forward propagation time difference T sent by the communication modulei1The reverse propagation time difference Ti2And calculating the water flow Q after the area S of the cross section of the open channel.
Preferably, the signal transmission center is specifically configured to: according to the forward propagation time difference Ti1The reverse propagation time difference Ti2And the area S of the cross section of the open channel, and calculating the water flow Q as follows:
wherein,expressed as mean water flow velocity, ofD is the distance between two banks of the open channel, C is the propagation speed of the ultrasonic wave in the water, and Delta T is obtainedCalculated, i is expressed as the ith pair of ultrasonic transducers.
Preferably, the signal transmission center is specifically configured to: according to the forward propagation time difference Ti1The reverse propagation time difference Ti2And the area S of the cross section of the open channel, and calculating the water flow Q as follows:
Q＝∑Ai×vi；
wherein A isiExpressed as empirical coefficient, viThe velocity of the water flow expressed as a laminar flow measurement, consisting ofD is the distance between two banks of the open channel, C is the propagation speed of ultrasonic waves in water, and delta TiBy Delta Ti＝|Ti1-Ti2Calculated, | i is expressed as the ith pair of ultrasonic transducers.
Preferably, the method further comprises the following steps: the ultrasonic wind direction anemoscope is used for measuring the relation between the wind direction and the wind speed and the water surface waves and calculating the influence of the wind direction and the wind speed on water flow.
Preferably, the method further comprises the following steps: and the rain gauge is used for measuring rainfall and the water amount flowing down from the slope protection surface of the open channel.
Preferably, the time of the clock synchronization module is synchronized with the GPS/Beidou atomic clock and is timed according to the same time reference of the atomic clock.
According to the invention, the ultrasonic pulse signals transmitted and received by the ultrasonic transducer are timed by a time service method, and the water flow rate is calculated by obtaining the time difference between the transmission of the ultrasonic pulse signals in the water body along the water flow direction and the transmission of the ultrasonic pulse signals in the reverse water flow direction, so that the water flow is measured in the ultra-wide open channel, and the problems of signal attenuation and difficulty in ultra-wide measurement in the wired connection process are solved; the water flow velocity is measured on the water bodies with different depths by using the plurality of ultrasonic transducers, so that the water flow is more accurately measured, and the measuring result cannot be substantially influenced by the damage of the individual ultrasonic transducers; in addition, an ultrasonic wind direction anemometer and a rain gauge are added, so that the problem of measuring the real water flow under the wind and rain conditions is solved.
Drawings
Fig. 1 is a schematic structural diagram of a time service photoacoustic open channel flow meter system provided by an embodiment of the invention;
FIG. 2 is a block diagram of a time service photoacoustic open channel flow meter system according to an embodiment of the present invention;
fig. 3A and 3B are a side view and a top view of a plurality of pairs of ultrasonic transducers arranged in river water according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention are further described in detail below with reference to the accompanying drawings and the embodiments.
Fig. 1 is a schematic structural diagram of a time service photoacoustic open channel flow meter system provided by an embodiment of the invention. As shown in fig. 1, the invention uses at least one pair of ultrasonic transducers 30 to measure the water flow rate of water in different depths by sequentially installing a plurality of ultrasonic transducers 30 from the water bottom to the water surface on both sides of the open channel for transmitting and receiving ultrasonic pulse signals, so that the water flow rate is more accurately measured, and the damage of individual ultrasonic transducers does not substantially affect the measurement result; then a vertical rod similar to a street lamp is erected on one side of the open channel, a main control device 10, a converter and other circuits are arranged in a telegraph pole, an ultrasonic transducer is used for transmitting and receiving ultrasonic pulse signals through a time service method to time, and the time difference between the transmission of the ultrasonic pulse signals in the water along the water flow direction and the transmission of the ultrasonic pulse signals in the reverse water flow direction is obtained to calculate the water flow rate, so that the water flow is measured in the ultra-wide open channel, and the problems that the signals are attenuated and ultra-wide measurement is difficult to realize in the wired connection process are solved; on the upper half of montant, there is a horizontal pole, and at least one laser scanner 50 is installed to the end of horizontal pole, and the scanner is installed and is carried out scanning along the open channel direction at a cloud platform, forms numerous water section, obtains the sectional area of open channel.
Fig. 2 is a structural block diagram of the time service photoacoustic open channel flow meter system provided by the embodiment of the invention. As shown in fig. 2, the present invention provides a time-service photoacoustic open channel flow meter system, which includes: a main control device 10, a drive circuit 20, at least one pair of ultrasonic transducers 30, a signal converter 40, at least one laser scanner 50, and a signal transmission center 60.
The master control device 10 includes a master control module 101, a clock synchronization module 102, and a communication module 103. The main control module 101 is configured to send an instruction and receive a digital signal at regular time, and calculate a time difference between sending and receiving ultrasonic pulse signals by the pair of ultrasonic transducers 30.
In an embodiment of the present invention, the main control module 101 calculates a forward propagation time difference T between the time when the first ultrasonic transducer 301 of the pair of ultrasonic transducers 30 transmits the ultrasonic pulse signal and the time when the second ultrasonic transducer 302 receives the ultrasonic pulse signali1And a back propagation time difference T from the time when the second ultrasonic transducer 302 transmits the ultrasonic pulse signal to the time when the first ultrasonic transducer 301 receives the ultrasonic pulse signali2。
In an embodiment of the present invention, the main control module 101 is further configured to obtain an area S of the open channel section according to the laser scanning of the laser scanner 50 on the open channel section and the silting, collapsing or blocking change under the open channel section.
The clock synchronization module 102 is configured to time the ultrasonic pulse signals sent and received by the ultrasonic transducer 30, and send the time result to the main control module 101. The time of the clock synchronization module 102 is synchronized with the GPS/Beidou atomic clock, and the time is timed according to the same time reference of the atomic clock.
The communication module 103 is configured to use the forward propagation time difference T calculated by the main control module 101i1Reverse propagation time difference Ti2And the area S of the open channel cross-section is sent to the signal transmission center 60.
The driving circuit 20 is configured to control the first ultrasonic transducer 301 of each pair of ultrasonic transducers 30 to transmit an ultrasonic pulse signal and the second ultrasonic transducer 302 of each pair of ultrasonic transducers 30 to receive the ultrasonic pulse signal after receiving a control instruction sent by the main control module 101 of the main control device 10 at regular time. Then, the second ultrasonic transducer 302 transmits an ultrasonic pulse signal, and the first ultrasonic transducer 301 receives the ultrasonic pulse signal.
The ultrasonic transducers 30 comprise a first ultrasonic transducer 301 and a second ultrasonic transducer 302, and are used for sending and receiving ultrasonic pulse signals, calculating forward flow and backward flow to form time difference and calculating flow rate. The first ultrasonic transducer 301 transmits an ultrasonic pulse signal, and the second ultrasonic transducer 302 receives the ultrasonic pulse signal, so that the propagation time difference of the sound wave is measured along the water flow direction; the second ultrasonic transducer 302 transmits an ultrasonic pulse signal, and the first ultrasonic transducer 301 receives the ultrasonic pulse signal, which is a measure of the difference in the propagation time of the sound wave against the water flow. And the ultrasonic transducer 30 converts the received ultrasonic pulse signal into an electronic pulse signal.
Fig. 3A and 3B are a side view and a top view of a plurality of pairs of ultrasonic transducers arranged in river water according to an embodiment of the present invention. As shown in fig. 3A and 3B, each pair of ultrasonic transducers 30 is sequentially arranged from the river bottom to the river surface, a first ultrasonic transducer 301 of each ultrasonic transducer 30 is installed at one side of the open channel, a second ultrasonic transducer 302 is installed at the other side of the open channel, the first ultrasonic transducer 301 emits a forward-flow ultrasonic pulse signal, the second ultrasonic transducer 302 emits an backward-flow ultrasonic pulse signal, the connection line of the first ultrasonic transducer 301 and the second ultrasonic transducer 302 of the ultrasonic probe of each pair of ultrasonic transducers 30 forms an angle θ with the water flow direction, and 0 ° < θ <180 °.
The signal converter 40 is configured to convert the electronic pulse signal sent by the pair of ultrasonic transducers 30 into a digital signal, and transmit the digital signal to the main control module 101 in the main control device 10.
Before and after the main control module 101 receives the timing result of the clock synchronization module 102, the laser scanner 50 is started or controlled to scan the underwater topography, the water flow section, the slope form of the open channel and the wave caused by wind, and the open channel section and the silting, collapsing or blocking change conditions under the section are scanned by laser to obtain the area S of the open channel section. The cross section area S of the cross section of the open channel to be measured changes due to the fact that silt under river water flows along with water, the laser scanner 50 is installed on the open channel, the cross section is scanned through laser, cross section change is obtained, and accuracy of measuring water flow is improved.
In one embodiment, the master control module 101 in the master control device 10 transmitsA command to the drive circuit 20; after receiving the instruction, the driving circuit 20 controls at least one pair of ultrasonic transducers 30 to transmit and receive ultrasonic pulse signals according to the instruction; when a first ultrasonic transducer 301 in a pair of ultrasonic transducers 30 transmits an ultrasonic pulse signal, the clock synchronization module 102 performs first timing in real time, and when a second ultrasonic transducer 302 receives the ultrasonic pulse signal, the clock synchronization module 102 performs second timing in real time; then, when the second ultrasonic transducer 302 of the pair of ultrasonic transducers 30 transmits the ultrasonic pulse signal, the clock synchronization module 102 performs timing in real time for the third time, and when the first ultrasonic transducer 301 receives the ultrasonic pulse signal, the clock synchronization module 102 performs timing in real time for the fourth time. Then, the ultrasonic transducer 30 converts the received ultrasonic pulse signal into an electronic pulse signal and sends the electronic pulse signal to the signal converter 40; the signal converter 40 converts the received electronic pulse signal into a digital signal, and transmits the digital signal to the main control module 101 in the main control device 10, and the main control module 101 obtains the forward propagation time difference T according to the first and second timingsi1Obtaining the back propagation time difference T according to the third and fourth times of timingi2Meanwhile, after receiving the timing result of the clock synchronization module 102, the main control module 101 starts or controls the laser scanner 50 to scan the open channel section and the silting, collapsing or blocking change condition under the section, so as to obtain the area S of the open channel section. Finally, the communication module 103 transmits the forward propagation time Ti1Reverse propagation time Ti2And the area S of the open channel cross-section is sent to the signal transmission center 60.
The signal transmitting center 60 is used for receiving the forward propagation time T which is sent by the communication module 103 and calculated by the main control module 101i1And a reverse propagation time Ti2And calculating the water flow Q according to the area S of the cross section of the open channel.
In one embodiment, the signal transmission center 50 may derive the water flow rate Q by two methods:
i obtaining average time difference of time differences formed by i timing for ultrasonic transducer
Then calculating the average water flow velocity according to the formula (2)Wherein the formula (2) is:
wherein D is the distance between two banks of the open channel, C is the propagation speed of the ultrasonic wave in water, and i is the ith pair of ultrasonic transducers.
According to the obtained average water flow velocityMultiplying the area S of the cross section to obtain a water flow formula as follows:
② the ith pair of ultrasonic transducers obtains the time difference Delta T of two measurementsi＝|Ti1-Ti2After | according to formula (4)
Calculating the water velocity v of the layered flow measurementiWherein the formula (4) is:
wherein D is the distance between two banks of the open channel, C is the propagation speed of the ultrasonic wave in water, and i is the ith pair of ultrasonic transducers.
According to the obtained water velocity v of the layered flow measurementiThen, the product is obtainedThe formula of the water flow is as follows:
Q＝∑Ai×vi(5)
wherein A isiExpressed as empirical coefficients.
According to the invention, the ultrasonic pulse signals transmitted and received by the ultrasonic transducer are timed by a time service method, so that the time difference between the transmission of the ultrasonic pulse signals in the water along the water flow direction and the transmission of the ultrasonic pulse signals in the reverse water flow direction is obtained to calculate the water flow velocity, and the water flow is measured in the ultra-wide open channel; in addition, a plurality of ultrasonic transducers are used for measuring the water flow velocity of water bodies at different depths, so that the measured water flow is more accurate.
The time service photoacoustic open channel flowmeter system of the invention further comprises: an ultrasonic anemometer 70 and a rain gauge 80. The ultrasonic anemoscope 70 is used for measuring wind direction and speed and the influence of the wind direction and speed on the water flow speed, and the rain gauge 80 is used for measuring rainfall and the water amount generated on the water surface and the slope protection surface of the open channel under the influence of the wind direction and speed.
In one embodiment, during a rainy weather, the ultrasonic transducer 30 is affected by the external strong wind to measure the water velocity, and the laser scanner 50 is affected by the precipitation to measure the area of the open channel section. Therefore, the invention monitors the wind direction and the wind speed in the air in real time by installing at least one ultrasonic anemoscope 70 on the surface of river water, then sends the detected information of the wind direction and the wind speed to the main control module 101, the main control module 101 sends an instruction to the anemoscope 70, the anemoscope 70 starts to measure and transmits the measurement result to the main control module 101, the main control module 101 corresponds the obtained information to the wave information captured by the laser module 50, calculates the influence deviation of different wind directions and wind speeds on the water flow speed, and compensates or deducts when calculating the flow to obtain the water flow speed under normal weather; meanwhile, at least one rain gauge 80 is installed on the river surface, rainfall and the amount of water flowing down from the slope protection surface of the open channel under the influence of wind direction and wind speed are detected in real time, then the measured water amount information is sent to the main control module 101, the main control module 101 sends an instruction to the rain gauge 80, the increased water amount of the water surface is calculated in time, meanwhile, the laser module 50 scans the amount of water generated by the water slope surface, and the main control module 101 calculates the actual water flow Q comprehensively.
By adding the ultrasonic wind direction anemoscope and the rain gauge, the invention solves the problem that the time service photoacoustic open channel flowmeter system measures the real water flow under the wind and rain conditions, so that the water flow measurement is more accurate.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A time service photoacoustic open channel flow meter system, comprising: a main control device (10), a drive circuit (20), at least one pair of ultrasonic transducers (30) and a signal converter (40); wherein the master control device (10) comprises a master control module (101), a clock synchronization module (102) and a communication module (103);
the pair of ultrasonic transducers (30) comprises a first ultrasonic transducer (301) and a second ultrasonic transducer (302) for sending and receiving ultrasonic pulse signals; the first ultrasonic transducer (301) transmits an ultrasonic pulse signal to the second ultrasonic transducer (302) to receive the ultrasonic pulse signal and transmit the ultrasonic pulse signal along the direction of water flow, and then the second ultrasonic transducer (302) transmits the ultrasonic pulse signal to the first ultrasonic transducer (301) to receive the ultrasonic pulse signal and transmit the ultrasonic pulse signal along the direction of reverse water flow;
the master control module (101) sends an instruction to the driving circuit (20), the driving circuit (20) controls the at least one pair of ultrasonic transducers (30) to transmit and receive ultrasonic pulse signals according to the received instruction, and meanwhile, the clock synchronization module (102) clocks the pair of ultrasonic pulse signals transmitted and received by the pair of ultrasonic transducers (30); the signal converter (40) converts the electronic pulse signals sent by the pair of ultrasonic transducers (30) into digital signals after receiving the electronic pulse signals, and sends the digital signals to the main control module (101); after receiving the timing result of the clock synchronization module (102), the main control module (101) calculates the propagation time difference between the ultrasonic pulse signals sent and received by the pair of ultrasonic transducers (30), and then sends the propagation time difference to the communication module (103) so that the flowmeter determines the water flow speed according to the propagation time difference.
2. The time service photoacoustic open channel flow meter system of claim 1, further comprising: the main control module (101) starts or controls the laser scanner (50), and the laser scans the open channel section and the silting, collapsing or blocking change condition under the section to obtain the area S of the open channel section.
3. The time service photoacoustic open channel flow meter system according to claim 1, wherein the at least one pair of ultrasonic transducers (30) are sequentially arranged from the bottom to the surface of the river, and the connecting line of the first ultrasonic transducer (301) and the second ultrasonic transducer (302) forms an angle θ with the water flow direction, and 0 ° < θ <180 °.
4. The time service photoacoustic open channel flow meter system of claim 3, wherein the flow meter system is characterized by the fact that it is a flow meter systemThe main control module (101) is specifically configured to: calculating the forward propagation time difference T of the ultrasonic pulse signal transmitted by the first ultrasonic transducer (301) to the ultrasonic pulse signal received by the second ultrasonic transducer (302) in the pair of ultrasonic transducers (30)i1(ii) a Calculating the reverse water flow reverse propagation time difference T between the ultrasonic pulse signal transmitted by the second ultrasonic transducer (302) of the pair of ultrasonic transducers (30) and the ultrasonic pulse signal received by the first ultrasonic transducer (301)i2。
5. The time service photoacoustic open channel flow meter system of claims 1-4, further comprising: a signal transmitting center (60) for receiving the forward propagation time difference T sent by the communication module (103)i1The reverse propagation time difference Ti2And calculating the water flow Q after the area S of the cross section of the open channel.
6. The time service photoacoustic open channel flow meter system according to claim 5, wherein the signal transmission center (60) is specifically configured to: according to the forward propagation time difference Ti1The reverse propagation time difference Ti2And the area S of the cross section of the open channel, and calculating the water flow Q as follows:
wherein,expressed as mean water flow velocity, ofD is the distance between two banks of the open channel, C is the propagation speed of the ultrasonic wave in the water, and Delta T is obtainedCalculated, i is expressed as the ith pair of ultrasonic transducers.
7. The time service photoacoustic open channel flow meter system according to claim 5, wherein the signal transmission center (60) is specifically configured to: according to the forward propagation time difference Ti1The reverse propagation time difference Ti2And the area S of the cross section of the open channel, and calculating the water flow Q as follows:
Q＝∑Ai×vi；
wherein A isiExpressed as empirical coefficient, viThe velocity of the water flow expressed as a laminar flow measurement, consisting ofD is the distance between two banks of the open channel, C is the propagation speed of ultrasonic waves in water, and delta TiBy Delta Ti＝|Ti1-Ti2Calculated, | i is expressed as the ith pair of ultrasonic transducers.
8. The time service photoacoustic open channel flow meter system of claim 1, further comprising: and the ultrasonic wind direction anemoscope (70) is used for measuring the relation between the wind direction and the wind speed and the water surface waves and calculating the influence of the wind direction and the wind speed on the water flow.
9. The time service photoacoustic open channel flow meter system of claim 1, further comprising: and the rain gauge (80) is used for measuring the rainfall and the water amount flowing down from the slope protection surface of the open channel.
10. The time service photoacoustic open channel flow meter system according to claim 1, wherein the time of the clock synchronization module (102) is synchronized with the GPS/beidou atomic clock and is timed according to the same time reference of the atomic clock.
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| CN111141365A (en) * | 2020-01-14 | 2020-05-12 | 浙江天禹信息科技有限公司 | Non-contact all-dimensional hydrological water level monitoring method |
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| CN113503943A (en) * | 2021-08-06 | 2021-10-15 | 北京奥特美克科技股份有限公司 | Self-diagnosis method, device and system for ultrasonic open channel flowmeter |
| CN113532560A (en) * | 2021-07-27 | 2021-10-22 | 北京奥特美克科技股份有限公司 | A flow measurement method and device |
| CN113865661A (en) * | 2021-10-15 | 2021-12-31 | 山脉科技股份有限公司 | A flow measuring device suitable for ultra-wide open channel and its installation method |
| CN114858227A (en) * | 2022-04-27 | 2022-08-05 | 北京奥特美克科技股份有限公司 | Open channel flow measuring device |
| CN117590022A (en) * | 2023-11-21 | 2024-02-23 | 唐山大方汇中仪表有限公司 | Anemometer control method, device, equipment and storage medium for roadway |
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| CN113865661A (en) * | 2021-10-15 | 2021-12-31 | 山脉科技股份有限公司 | A flow measuring device suitable for ultra-wide open channel and its installation method |
| CN114858227A (en) * | 2022-04-27 | 2022-08-05 | 北京奥特美克科技股份有限公司 | Open channel flow measuring device |
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Effective date of registration: 20191224 Address after: 300000 floor 1, unit a, building 6, Rongxin Industrial Park, No. 3667, Zhongbin Avenue, Zhongxin Tianjin Ecological City, Binhai New Area, Tianjin Applicant after: Tiandi intelligent control (Tianjin) Technology Co., Ltd Address before: 100071 128 South Fourth Ring Road West, Fengtai District, Beijing Applicant before: Beijing Zhong Zhong precise Technology Co., Ltd. |
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