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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- CN108572016A CN108572016A CN201810505373.2A CN201810505373A CN108572016A CN 108572016 A CN108572016 A CN 108572016A CN 201810505373 A CN201810505373 A CN 201810505373A CN 108572016 A CN108572016 A CN 108572016A
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- open channel
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Classifications
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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
-
- 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
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
Measuring water flow field of the present invention more particularly to a kind of time service optoacoustic open channel flow rate meter systems.
Background technology
Currently, time difference method ultrasonic open channel flowmeter is corresponding with other side in open channel side by ultrasonic transducer
Certain angle is formed, transmission signal is connected with cable, flow velocity is calculated by the time difference of generation according to flow, uses flow velocity
The section for being multiplied by river is exactly specific discharge.Since to transmit loss amount in the cable big for signal, ultra-wide open channel is unable to measure,
In addition erecting cable is aerial or laying river bed all has security risk, and time difference method ultrasonic open channel flowmeter generally can only be 10
Rice or so open channel uses.
Usually all measured in the market using monophonic, since flow different depth flow velocity is also different, which results in
Metering is inaccurate, and error is big.Ultrasonic transducer damages in use simultaneously, just stops metering, can cause to lose.
Invention content
To solve the above-mentioned problems, the present invention proposes a kind of time service optoacoustic open channel flow rate meter systems.
The present invention provides a kind of time service optoacoustic open channel flow rate meter systems, main control unit, driving circuit, at least a pair are super
Acoustic wave transducer and signal adapter；The wherein described main control unit includes main control module, clock synchronization module and communication module；
The pair of ultrasonic transducer includes the first ultrasonic transducer and the second ultrasonic transducer, for sending and receiving ultrasound
Wave pulse signal；Wherein, first ultrasonic transducer emits ultrasonic pulse signal to second ultrasonic transducer
It receives ultrasonic pulse signal and carries out Parallel to the flow direction propagation, then second ultrasonic transducer emits ultrasonic pulse
Signal receives ultrasonic pulse signal to first ultrasonic transducer and carries out inverse water (flow) direction propagation；The main control module
The driving circuit is sent instructions to, the driving circuit controls the pair of ultrasonic wave transducer according to the described instruction of reception
Device emits and receives ultrasonic pulse signal, while the clock synchronization module emits and connects to the pair of ultrasonic transducer
It receives ultrasonic pulse signal and carries out timing；The signal adapter receives the electronics that the pair of ultrasonic transducer is sent
After pulse signal, it is converted into digital signal, and is sent to the main control module；The main control module receives the clock and synchronizes mould
After the timing result of block, the propagation time difference that the pair of ultrasonic transducer sends and receives ultrasonic pulse signal is calculated
Afterwards, it is sent to the communication module together, so that flowmeter determines water velocity according to the propagation time difference.
Preferably, further include：At least one laser scanner, the main control module start or control the laser scanning
Device deposits, collapses or blocks situation of change under laser scanning open channel section and section, obtains the area S of open channel section.
Preferably, at least a pair of of ultrasonic transducer is aligned to river surface, first ultrasonic waves from river bed successively
Can device and the line of second ultrasonic transducer and the angle of water (flow) direction be θ, and 0 °<θ<180°.
Preferably, the main control module is specifically used for：Calculate first ultrasound in the pair of ultrasonic transducer
Wave transducer transmitting ultrasonic pulse signal receives the stream downstream of ultrasonic pulse signal to second ultrasonic transducer
Forward-propagating time difference Ti1；Calculate second ultrasonic transducer transmitting ultrasonic wave arteries and veins in the pair of ultrasonic transducer
Rush the backpropagation time difference of the stream against the current T that signal receives ultrasonic pulse signal to first ultrasonic transduceri2。
Preferably, further include：Signal launching centre sends the forward-propagating time difference T for receiving communication modulei1、
The backpropagation time difference Ti2After the area S of the open channel section, water flow Q is calculated.
Preferably, the signal launching centre is specifically used for：According to the forward-propagating time difference Ti1, the backpropagation
Time difference Ti2With the area S of the open channel section, calculating water flow Q is：
Wherein,It is expressed as average current velocity, byIt obtains, D is expressed as open channel two sides spacing
Be expressed as ultrasonic wave spread speed in water from, C, Δ T byIt calculates
It obtains, i is expressed as i-th pair ultrasonic transducer.
Preferably, the signal launching centre is specifically used for：According to the forward-propagating time difference Ti1, the backpropagation
Time difference Ti2With the area S of the open channel section, calculating water flow Q is：
Q=∑s Ai×vi；
Wherein, AiIt is expressed as empirical coefficient, viIt is expressed as the water velocity of layering flow measurement, by
It arrives, D is expressed as open channel two sides distance, and C is expressed as ultrasonic wave spread speed in water, Δ TiBy Δ Ti=| Ti1-Ti2| it calculates
It arrives, i is expressed as i-th pair ultrasonic transducer.
Preferably, further include：Ultrasonic anerovane, for measuring wind direction and wind velocity size and water surface stormy waves relationship, and
Calculate influence of the wind direction and wind velocity to flow.
Preferably, further include：Rainfall gauge, the water that the bank protection surface current for measuring rainfall and open channel drops down.
Preferably, the time of the clock synchronization module is synchronous with GPS/ Big Dipper atomic clocks, and according to the same of atomic clock
Time reference timing.
The present invention emits ultrasonic transducer by time service method and receives ultrasonic pulse signal and carries out timing, is surpassed
The time difference that sound wave pulse signal Parallel to the flow direction in water body is propagated and inverse water (flow) direction is propagated calculates water discharge speed, realizes
Water flow is measured in ultra-wide open channel, the decaying of signal during wired connection is solved the problems, such as, is difficult to realize ultra-wide measurement；Make
Water flow velocity is measured to the water body of different depth with multiple ultrasonic transducers so that it is more accurate and a other to measure water flow
The damage of ultrasonic transducer will not substantially influence the result of metering；In addition increase ultrasonic anerovane and rainfall
Meter, solves in wind and rain, measures true water flow.
Description of the drawings
Fig. 1 is the structural schematic diagram of time service optoacoustic open channel flow rate meter systems provided in an embodiment of the present invention；
Fig. 2 is the structure diagram of time service optoacoustic open channel flow rate meter systems provided in an embodiment of the present invention；
Fig. 3 A and Fig. 3 B are multipair ultrasonic transducer arrangement mode side view in river water provided in an embodiment of the present invention
And vertical view.
Specific implementation mode
To make the technical solution of the embodiment of the present invention and becoming apparent from for advantage expression, below by drawings and examples,
Technical scheme of the present invention will be described in further detail.
Fig. 1 is the structural schematic diagram of time service optoacoustic open channel flow rate meter systems provided in an embodiment of the present invention.As shown in Figure 1,
The present invention is surpassed for transmitting and receiving by installing multiple ultrasonic transducers 30 successively to the water surface by the bottom in the both sides of open channel
Sound wave pulse signal, at least a pair of of ultrasonic transducer 30 of use measure water flow velocity to the water body of different depth so that measure water
Flow is more accurate, and the damage of a other ultrasonic transducer will not substantially influence the result of metering；Then bright
A montant for being similar to street lamp is erect in the side of canal, has the circuits such as main control unit 10, converter in electric pole, passes through time service
Method emits ultrasonic transducer and receives ultrasonic pulse signal and carries out timing, and it is suitable in water body to obtain ultrasonic pulse signal
The time difference that water (flow) direction is propagated and inverse water (flow) direction is propagated calculates water discharge speed, realizes and measures water flow in ultra-wide open channel,
It solves the problems, such as the decaying of signal during wired connection, be difficult to realize ultra-wide measurement；On the first half of montant, there are one
At least one laser scanner 50 is installed in the end of cross bar, cross bar, and scanner is mounted on a cloud platform and carries out along open channel direction
It is scanned, forms numerous water section, obtain the area of open channel section.
Fig. 2 is the structure diagram of time service optoacoustic open channel flow rate meter systems provided in an embodiment of the present invention.As shown in Fig. 2, this
Invention proposes a kind of time service optoacoustic open channel flow rate meter systems comprising：Main control unit 10, driving circuit 20, at least a pair
Ultrasonic transducer 30, signal adapter 40, at least one laser scanner 50 and signal launching centre 60.
Main control unit 10 includes main control module 101, clock synchronization module 102 and communication module 103.Wherein, master control mould
Block 101 sends instruction for timing and receives digital signal, and calculates a pair of of ultrasonic transducer 30 and send and receive ultrasound
The time difference of wave pulse signal.
In an embodiment of the invention, main control module 101 calculates the first ultrasonic wave in a pair of of ultrasonic transducer 30
Energy converter 301 emits ultrasonic pulse signal and is receiving ultrasonic pulse signal just to second ultrasonic transducer 302
To propagation time difference Ti1It is connect to the first ultrasonic transducer 301 with the second ultrasonic transducer 302 transmitting ultrasonic pulse signal
Receive the backpropagation time difference T of ultrasonic pulse signali2。
In an embodiment of the invention, main control module 101 is additionally operable to bright according to 50 laser scanning of the laser scanner
Situation of change is deposited, collapses or blocked under canal section and section, obtains the area S of open channel section.
Clock synchronization module 102, which is used to send and receive ultrasonic pulse signal to ultrasonic transducer 30, carries out timing,
And the result of timing is sent to main control module 101.The wherein time of clock synchronization module 102 and GPS/ Big Dipper atomic clocks is same
Step, and according to the same time reference timing of atomic clock.
Communication module 103 is used for 101 calculated forward-propagating time difference T of main control modulei1, the backpropagation time difference
Ti2It is sent to signal launching centre 60 with the area S of open channel section.
After driving circuit 20 is used for according to the control instruction that main control module 101 is periodically sent in main control unit 10 is received,
It controls the first ultrasonic transducer 301 in each pair of ultrasonic transducer 30 and emits ultrasonic pulse signal, the second ultrasonic wave transducer
Device 302 receives ultrasonic pulse signal.Then, the second ultrasonic transducer 302 emits ultrasonic pulse signal, the first ultrasound
Wave transducer 301 receives ultrasonic pulse signal.
Ultrasonic transducer 30 include the first ultrasonic transducer 301 and the second ultrasonic transducer 302, for send and
Ultrasonic pulse signal is received, time and tide is calculated and forms time difference calculating flow velocity.First ultrasonic transducer 301 emits ultrasonic wave
Pulse signal, the second ultrasonic transducer 302 receive ultrasonic pulse signal, are that Parallel to the flow direction measures acoustic transit time
Difference；Second ultrasonic transducer 302 emits ultrasonic pulse signal, and the first ultrasonic transducer 301 receives ultrasonic pulse
Signal is that stream orientation measurement acoustic transit time is poor against the current.And ultrasonic transducer 30 will receive ultrasonic pulse signal conversion
For electronics pulse signal.
Fig. 3 A and Fig. 3 B are multipair ultrasonic transducer arrangement mode side view in river water provided in an embodiment of the present invention
And vertical view.As shown in Figure 3A and Figure 3B, each pair of ultrasonic transducer 30 is aligned to river surface, each ultrasonic waves from river bed successively
First ultrasonic transducer 301 is mounted on the side of open channel in energy device 30, and the second ultrasonic transducer 302 is mounted on the another of open channel
Side, the first ultrasonic transducer 301 emit Parallel to the flow direction ultrasonic pulse signal, the transmitting of the second ultrasonic transducer 302
Against water (flow) direction ultrasonic pulse signal, the first ultrasonic transducer of ultrasonic probe in every a pair of ultrasonic transducer 30
301 and second ultrasonic transducer 302 line and the angle of water (flow) direction be θ, and 0 °<θ<180°.
Signal adapter 40 is used to convert the electronics pulse signal that a pair of of ultrasonic transducer 30 sends over to number
Word signal, and send the main control module 101 in main control unit 10 to.
Laser scanner 50 starts or controls before and after the timing result that main control module 101 receives clock synchronization module 102
Laser scanner 50 is adopted for being scanned to open channel underwater topography, active cross-section, side slope form and wind-induced wave
With depositing, collapsing or blocking situation of change under laser scanning open channel section and section, the area S of open channel section is obtained.Due to river
Underwater mud with dampening flowing so that open channel section part cross-sectional area S to be measured changes, one installed above in open channel
Laser scanner 50 obtains section variation by laser scanning section, to improve the precision for measuring water flow.
In one embodiment, the main control module 101 in main control unit 10 sends an instruction to driving circuit 20；It drives
Dynamic circuit 20 controls at least a pair of of transmitting of ultrasonic transducer 30 according to instruction after receiving instruction and receives ultrasonic pulse letter
Number；When first ultrasonic transducer 301 emits ultrasonic pulse signal in a pair of of ultrasonic transducer 30, clock synchronization module
102 carry out first time timing in real time, and when the second ultrasonic transducer 302 receives ultrasonic pulse signal, clock synchronizes mould
Second of the progress timing in real time of block 102；Then, when in a pair of of ultrasonic transducer 30 transmitting of second ultrasonic transducer 302 it is super
When sound wave pulse signal, 102 third time of clock synchronization module carries out timing in real time, when the first ultrasonic transducer 301 receives
When ultrasonic pulse signal, the 4th progress timing in real time of clock synchronization module 102.Then ultrasonic transducer 30 is according to reception
After the ultrasonic pulse signal arrived, it is converted into electronics pulse signal, and is sent to signal adapter 40；Signal adapter 40 will
After the electronics pulse signal of reception is converted into digital signal, the main control module 101 in main control unit 10, master control mould are sent to
Block 101 is according to the forward-propagating time difference T obtained for the first time with second of timingi1, obtained according to third time and the 4th timing
Backpropagation time difference Ti2, meanwhile, after main control module 101 receives the timing result of the clock synchronization module 102, starts or control
Laser scanner 50 processed deposits, collapses or blocks situation of change under laser scanning open channel section and section, obtains open channel section
Area S.Last communication module 103 is by forward-propagating time Ti1, backpropagation time Ti2It is sent to the area S of open channel section
Signal launching centre 60.
Signal launching centre 60 is used to receive being passed by 101 calculated forward direction of main control module for the transmission of communication module 103
T between sowing timei1With backpropagation time Ti2And the area S of open channel section, calculate water flow Q.
In one embodiment, signal launching centre 50 can obtain water flow Q by two methods：
1. i obtains ultrasonic transducer the average time difference of the time difference of i timing formation
Then average current velocity is calculated according to formula (2)Wherein formula (2) is：
Wherein, D is expressed as open channel two sides distance, and C is expressed as ultrasonic wave spread speed in water, and i is expressed as i-th pair ultrasound
Wave transducer.
According to obtaining average current velocityThe area S for being multiplied by section just obtains water flow formula and is：
2. i-th pair ultrasonic transducer obtains time of measuring difference Δ T twicei=| Ti1-Ti2| after, according to formula (4)
Calculate the water velocity v of layering flow measurementi, wherein formula (4) is：
Wherein, D is expressed as open channel two sides distance, and C is expressed as ultrasonic wave spread speed in water, and i is expressed as i-th pair ultrasound
Wave transducer.
According to the water velocity v of obtained layering flow measurementiIt is to get to water flow formula afterwards：
Q=∑s Ai×vi (5)
Wherein, AiIt is expressed as empirical coefficient.
The present invention emits ultrasonic transducer by time service method and receives ultrasonic pulse signal and carries out timing, is surpassed
The time difference that sound wave pulse signal Parallel to the flow direction in water body is propagated and inverse water (flow) direction is propagated calculates water discharge speed, realizes
Water flow is measured in ultra-wide open channel；In addition water flow velocity is measured to the water body of different depth using multiple ultrasonic transducers so that
It is more accurate to measure water flow.
Time service optoacoustic open channel flow rate meter systems of the present invention further include：Ultrasonic anerovane 70 and rainfall gauge 80.Wherein,
Ultrasonic anerovane 70 is for the influence of wind speed and wind direction and wind velocity to water velocity that determines the wind direction, and rainfall gauge 80 is for surveying
Measure rainfall and under the influence of wind direction and wind velocity, the water that the water surface of open channel and bank protection face generate.
In one embodiment, in a rainy day that it's raining and blowing hard, since extraneous strong wind can influence ultrasonic transducer
30 measure water velocity, and since precipitation can influence the area that laser scanner 50 measures open channel section.So of the invention
By showing to install at least one ultrasonic anerovane 70 in river water, the wind direction and wind speed in air are monitored in real time, so
The information of the wind direction detected and wind speed is sent to main control module 101 afterwards, main control module 101 sends instructions to anerovane
70, anerovane 70 starts to measure, and measurement result is sent to main control module 101, main control module 101 will obtain information and swash
The wave information that optical module 50 captures is corresponding, calculates influence deviation of the different wind direction and wind velocities to flow rate of water flow, is flowed calculating
It compensates or reduces when amount, obtain the water velocity under normal weather；Simultaneously show that at least one rainfall gauge is installed in river water
80, detection rainfall and the water that open channel bank protection face gutters down under the influence of wind direction and wind velocity, then will measure in real time
Water amount information be sent to main control module 101, main control module 101 sends instructions to rainfall gauge 80, calculates the increasing of the water surface in time
The water added, while laser module 50 scans the water that slope surface waterborne generates, the practical flow that 101 COMPREHENSIVE CALCULATING of main control module goes out
Measure Q.
The present invention is solved in wind and rain, time service optoacoustic is bright by increasing ultrasonic anerovane and rainfall gauge
Canal flowmeter system measures true water flow so that it is more accurate to measure water flow.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.
Above-described specific implementation mode has carried out further the purpose of the present invention, technical solution and advantageous effect
It is described in detail, it should be understood that the foregoing is merely the specific implementation mode of the present invention, is not intended to limit the present invention
Protection domain, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of time service optoacoustic open channel flow rate meter systems, which is characterized in that including：Main control unit (10), driving circuit (20),
At least a pair of of ultrasonic transducer (30) and signal adapter (40)；The wherein described main control unit (10) includes main control module
(101), clock synchronization module (102) and communication module (103)；
A pair of of ultrasonic transducer (30) includes the first ultrasonic transducer (301) and the second ultrasonic transducer (302), is used for
Send and receive ultrasonic pulse signal；Wherein, first ultrasonic transducer (301) emits ultrasonic pulse signal to institute
It states the second ultrasonic transducer (302) and receives ultrasonic pulse signal progress Parallel to the flow direction propagation, it is then described the second to surpass
Acoustic wave transducer (302) transmitting ultrasonic pulse signal receives ultrasonic pulse to first ultrasonic transducer (301)
Signal carries out inverse water (flow) direction and propagates；
The main control module (101) sends instructions to the driving circuit (20), and the driving circuit (20) is according to the institute of reception
It states instruction and emits and receive ultrasonic pulse signal, while the clock to control at least a pair of of ultrasonic transducer (30)
Synchronization module (102) emits the pair of ultrasonic transducer (30) and receives ultrasonic pulse signal and carries out timing；It is described
After signal adapter (40) receives the electronics pulse signal of the pair of ultrasonic transducer (30) transmission, it is converted into number
Signal, and it is sent to the main control module (101)；The main control module (101) receives the meter of the clock synchronization module (102)
When result after, calculate the propagation time difference that the pair of ultrasonic transducer (30) sends and receives ultrasonic pulse signal
Afterwards, it is sent to the communication module (103) together, so that flowmeter determines water velocity according to the propagation time difference.
2. time service optoacoustic open channel flow rate meter systems according to claim 1, which is characterized in that further include：It is at least one to swash
Optical scanner (50), the main control module (101) start or control the laser scanner (50), laser scanning open channel section and
Situation of change is deposited, collapses or blocked under section, obtains the area S of open channel section.
3. time service optoacoustic open channel flow rate meter systems according to claim 1, which is characterized in that at least a pair of of ultrasonic wave
Energy converter (30) is aligned to river surface, and first ultrasonic transducer (301) and second ultrasonic waves from river bed successively
Can the line of device (302) and the angle of water (flow) direction be θ, and 0 °<θ<180°.
4. time service optoacoustic open channel flow rate meter systems according to claim 3, which is characterized in that the main control module (101)
It is specifically used for：Calculate first ultrasonic transducer (301) the transmitting ultrasonic wave in the pair of ultrasonic transducer (30)
Pulse signal receives the forward-propagating time difference of stream downstream of ultrasonic pulse signal to second ultrasonic transducer (302)
Ti1；Calculate second ultrasonic transducer (302) the transmitting ultrasonic pulse letter in the pair of ultrasonic transducer (30)
The backpropagation time difference of the stream against the current T of ultrasonic pulse signal number is received to first ultrasonic transducer (301)i2。
5. the time service optoacoustic open channel flow rate meter systems according to claim 1-4, which is characterized in that further include：Signal emits
Center (60) sends the forward-propagating time difference T for receiving communication module (103)i1, the backpropagation time difference Ti2
After the area S of the open channel section, water flow Q is calculated.
6. time service optoacoustic open channel flow rate meter systems according to claim 5, which is characterized in that the signal launching centre
(60) it is specifically used for：According to the forward-propagating time difference Ti1, the backpropagation time difference Ti2With the face of the open channel section
Product S, calculating water flow Q is：
Wherein,It is expressed as average current velocity, byIt obtains, D is expressed as distance between open channel two sides, C tables
Be shown as ultrasonic wave spread speed in water, Δ T byIt is calculated
, i is expressed as i-th pair ultrasonic transducer.
7. time service optoacoustic open channel flow rate meter systems according to claim 5, which is characterized in that the signal launching centre
(60) it is specifically used for：According to the forward-propagating time difference Ti1, the backpropagation time difference Ti2With the face of the open channel section
Product S, calculating water flow Q is：
Q=∑s Ai×vi；
Wherein, AiIt is expressed as empirical coefficient, viIt is expressed as the water velocity of layering flow measurement, byIt obtains, D
It is expressed as open channel two sides distance, C is expressed as ultrasonic wave spread speed in water, Δ TiBy Δ Ti=| Ti1-Ti2| it is calculated,
I is expressed as i-th pair ultrasonic transducer.
8. time service optoacoustic open channel flow rate meter systems according to claim 1, which is characterized in that further include：Ultrasonic wave wind direction
Anemobiagraph (70) for measuring wind direction and wind velocity size and water surface stormy waves relationship, and calculates influence of the wind direction and wind velocity to flow.
9. time service optoacoustic open channel flow rate meter systems according to claim 1, which is characterized in that further include：Rainfall gauge (80),
The water that bank protection surface current for measuring rainfall and open channel drops down.
10. time service optoacoustic open channel flow rate meter systems according to claim 1, which is characterized in that the clock synchronization module
(102) time is synchronous with GPS/ Big Dipper atomic clocks, and according to the same time reference timing of atomic clock.
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| CN109459101A (en) * | 2018-12-27 | 2019-03-12 | 山东汘沄智能科技有限公司 | A kind of intellectual water meter display system and intellectual water meter index dial structure |
| 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 |
| CN112629597A (en) * | 2020-12-03 | 2021-04-09 | 水利部交通运输部国家能源局南京水利科学研究院 | System for measuring overtopping amount of dike |
| 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 | Flow measurement method and device |
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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 |
| CN112629597A (en) * | 2020-12-03 | 2021-04-09 | 水利部交通运输部国家能源局南京水利科学研究院 | System for measuring overtopping amount of dike |
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