CN106441521A - Full-automatic serial connection water meter verification and calibration device - Google Patents
Full-automatic serial connection water meter verification and calibration device Download PDFInfo
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- CN106441521A CN106441521A CN201610960701.9A CN201610960701A CN106441521A CN 106441521 A CN106441521 A CN 106441521A CN 201610960701 A CN201610960701 A CN 201610960701A CN 106441521 A CN106441521 A CN 106441521A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 183
- 238000012795 verification Methods 0.000 title abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 3
- 238000003556 assay Methods 0.000 claims description 25
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000009189 diving Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 238000004364 calculation method Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- -1 heating power Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention relates to a water meter verification device, in particular to a full-automatic serial connection water meter verification and calibration device which comprises a device body, a PLC, a meter clamping mechanism, a constant pressure mechanism, a constant temperature mechanism, a flow adjusting valve, a water tank, an image acquisition device and a water tube, wherein the meter clamping mechanism comprises a water meter rack, a water meter clamp and a plurality of telescopic cylinders; the constant pressure mechanism comprises a water pump, a transducer, a pressure stablizing tank and a pressure sensor; the water pump, the pressure stabilizing tank and the pressure sensor are serially connected with the water tube; the pressure sensor is further electrically connected with the PLC; the PLC is sequentially electrically connected with the transducer and the water pump; the constant temperature mechanism comprises a water cooler, a submersible water pump and a temperature sensor; the submersible water pump is arranged inside the water tank and is communicated with the water cooler; the temperature sensor is arranged inside the water tank; the water cooler, the submersible pump and the temperature sensor are all electrically connected with the PLC; and the flow adjusting valve is serially connected with the water tube and is connected with the PLC.
Description
Technical field
The present invention relates to checking device tested by a kind of water meter, specially a kind of fully-automatic series water meter verifies assay device.
Background technology
Water meter is widely used in the industries such as tap water, heating power, chemical industry, and producing the enterprise of water meter or metrological service needs to these
The error of indication of water meter carries out performance detecting according to the code that relevant departments formulate.National metrological verification regulations specify, to water meter
Three flow point tolerance calibratings such as nominal flow rate, boundary flow, minimum discharge must be carried out.Opened using manual static mostly at present
Stop volume relative method, testing person needs manual three switchings discharge, four readings are entered rower by water gauge registration and three times
Quasi- measuring device liquidometer water level reads, and these data of manual record simultaneously calculate various errors, then manual calibrating data inputting meter
Calculation machine is easy to achieve, inquire about and print.In whole verification process, testing person needs the operation of real-time control assay device, with
20mm bore water meter new standard calibration, a car water meter (7 water meters) calibrating need to take 45 minutes, manually when various registrations are read
Need to close liquid level stabilizing in valve wait standard capacity measure, the stability in these start and stop stages, the interpretation of level readings are missed
Differ from, calibration precision will all be affected by water gauge indicating graduation resolution and artificial origin.The work that this calibrating mode is present
Measure numerous defects such as big, efficiency is low, precision is low, personal error is big, verification result is not objective apparent.
The fully-automatic series band that commonly uses is pressure, and water meter verification assay device has three kinds:1st, artificial operating series band is pressure
Apparatus for calibrating water meter:This kind of device is more original static start-stop volume subtraction unit, is manually operated using the judgement of human eye,
The numeral of red pointer is read, adjust flow point and the start-stop of water consumption is examined and determine, there is very big personal error.Calibration efficiency is low,
Error is big, and librarian use is many.2nd, infrared controlled standard series connection carries pressure apparatus for calibrating water meter (static start-stop volume subtraction unit):This
It is on the basis of manually-operated to plant device, has installed infrared limit switch and electromagnetic valve, phase on standard capacity measure device additional
To reducing the error for producing when artificial pass cuts off the water.The spacing error of infrared limit switch and still continue to use artificial copy reading calibrating represent
The mode of number, determines that the error of the device is still very big.
Camera head type series connection carries pressure apparatus for calibrating water meter (static start-stop quality subtraction unit):This kind of device is manually to grasp
Larger change has been carried out on the device of work, it is achieved that semi-automatic.Install photographic head additional, replace artificial copy reading number；Electronic scale
Standard measuring device is instead of, calibration precision increases.Easily be subject to when but photographic head captures image extraneous light source interference and
The bubble interference of gauge outfit, easily produces captured image None- identified and identification mistake and causes reading entanglement or cannot reading
Phenomenon, needs operator to be modified on software in time, personnel's computation is required higher.The device is not thoroughly solved
New operating process and operation easier certainly can be also brought while problem.
Chinese patent CN103175588A also discloses that a kind of pressure water meter of fully-automatic series band verifies assay device at present,
Including water meter calibration fundamental mechanism, flow counting mechanism, metrological service, pipeline and control system；The water meter calibration foundation machine
Structure includes water source device, treats, by more piece test straight length and polylith, the test pipeline section that water gauge spaced series constitute, and tests pipeline section
It is arranged on correction platform position；Described treat per block water gauge correspond to a flow counting mechanism；The metrological service include effusion meter,
Work container and electronic weighing appliance, the electronic weighing appliance is arranged on the bottom of Work container；The tail of the test pipeline section
End, by pipeline, water is introduced effusion meter and Work container successively；The control system combines scene using computer long-distance control
The industrial automation mechanism of PLC control or the Single-chip Controlling mechanism based on embedded system；Control system and effusion meter
Number mechanism, the electronic weighing appliance electrical connection of metrological service.
While also including to measure electromagnetic valve；The measurement electromagnetic valve includes nominal flow rate electromagnetic valve, boundary flow solenoid valve
With minimum discharge electromagnetic valve；The flow is calculated as spinner flowmeter, including with the measurement each self-corresponding nominal flow rate meter of electromagnetic valve,
Boundary effusion meter and minimum stream gauge；Pipeline is divided into three road branch roads, the nominal stream between test pipeline section tail end and diverter
Amount electromagnetic valve and nominal flow rate meter, boundary flow solenoid valve and boundary effusion meter and minimum discharge electromagnetic valve and minimum stream gauge
It is separately positioned on the branch road of aforementioned three road.
The mode that the water meter of all of prior art is verified at present, the calibration standard that 03-09 is adopted is all by flowing to big
In the case of amount, boundary flow and three flows of low discharge, water meter is calibrated, greatest problem present in which has two,
First, the calculating of error for being reached using the measurement on big flow, boundary flow and this 3 points of low discharge not can completely
The error for showing the water meter is not necessarily completely in the range of technical requirements, still can be there is an other deviation water meter and be occurred,
Second, be required for be measured after Flow-rate adjustment to stable process again during adjusting every time flow, adjust flow when
Between plus the current stabilization time add time of measuring, the time of measuring for water meter is all longer each time, the water meter quantity that one day can calibrate
Very limited, the effect of detection is different sooner or later, and impact of the temperature to watch core is very big, and after many times having detected, table on the contrary can
There is error.
Content of the invention
For above-mentioned deficiency of the prior art, the present invention provides a kind of water meter convenient mounting and clamping and automatically controls flow velocity and stream
Amount realizes continuous measurement and state modulator is stable, and calibration error is extremely low, the high fully-automatic series water meter verification inspection of calibration efficiency
Determine device.
For realizing above technical purpose, the technical scheme is that:A kind of fully-automatic series water meter verifies assay device,
Including device body, PLC, meter clamping mechanism, constant pressure mechanism, constant temperature mechanism, flow control valve, water tank, image collector
Put and water pipe, the meter clamping mechanism includes that water gage bracket, water meter fixture and telescopic cylinder are multiple, the water gage bracket is arranged on device sheet
On body, the cylinder body of the telescopic cylinder is on water gage bracket, and the water meter fixture is arranged on the telescopic end of telescopic cylinder, institute
State water meter fixture and conduction pipe is provided with, the constant pressure mechanism includes water pump, converter, vacuum tank and pressure transducer, the water
Pump, vacuum tank and pressure transducer are serially connected on water pipe, and the pressure transducer is also electrically connected with PLC, the PLC control
Device processed is also sequentially connected electrically with converter and water pump, and the constant temperature mechanism includes water chiller, immersible pump and temperature sensor, described
Immersible pump is located in water tank and is connected with water chiller, and the temperature sensor is located in water tank, the water chiller, immersible pump and temperature
Degree sensor is all electrically connected with PLC, and the flow control valve is serially connected on water pipe and is connected with PLC, is also wrapped
Include electronic scale heavy-duty machine, electronic scale heavy-duty machine on the device body and with water pipe UNICOM.
Preferably, the conduction pipe includes to turn on tube body and supporting part, the supporting part is arc and and conduction pipe
The lower opening portion connection of body.
The structure preferably, the conducting tube body and supporting part are formed in one.
Preferably, the flow control valve includes the ball valve comprising valve element and valve element connecting rod being connected on water pipe
Door, for driving servomotor and the zero point positioner of the Ball valve, and for connect the servo motor output shaft with
The shaft coupling of the valve element connecting rod of the Ball valve, the servomotor closed mode orientates zero point as, and by the feedback of status
To servomotor so as to Ball valve described in the Serve Motor Control aperture, the valve element top is provided with groove, the ball valve
The valve element connecting rod lower end of door is placed in groove；The valve element of the Ball valve is the spheroid that a center has manhole, described
Valve element has the microflute that several are easy to current to pass through on ball internal chamber wall, and the microflute is communicated with the manhole.
Preferably, diameter of the diameter of the manhole of the valve element less than outlet.
Preferably, the microflute is " V " type.
Preferably, the microflute is distributed on the ball lumen circumference, quantity is 1-3.
Preferably, the microflute is 2 symmetrical " V " type grooves.
From the above, it can be seen that the present invention possesses advantages below：First, by servomotor, zero point positioner, ball
Cooperation between valve and microflute can allow the adjustment node of flow velocity to form seriality survey from original distributing measurement
Amount.
Secondly, the pressure in water pipe can be caused by the cooperation between pressure transducer, converter, water pump and vacuum tank
Keep constant, while the cooperation of water chiller, immersible pump and water tank can cause the water flow temperature in water pipe to keep constant, so that
The parameters for obtaining the current to be measured in water pipe keep stable, so that the fixed stability of water meter amount.
Again, by the data of image acquisition device be no longer pointer swing circle, but the deflection angle of pointer
Degree, using the ratio calculation error between deflection angle and predetermined deflection angle.
Furthermore, water gage bracket by water meter fixture, conducting tube body and supporting part between cooperation cause water meter put and
The work extremely convenient of clamp, greatly improves the efficiency of water pump composite to be measured.
In view of the foregoing it is apparent that the present invention fully-automatic series water meter verification assay device install and measure error with
And the mode of calculation error compare existing at present be extremely improved for the mode of water meter verification and improve, for water
For table dispatches from the factory, the quantitative requirement of personnel is not only greatly reduced while also improving the verification quantity of water meter.
Description of the drawings
Fig. 1 is the front view of the fully-automatic series water meter verification assay device of the present invention；
Fig. 2 is the structural representation of the fully-automatic series water meter verification assay device of the present invention；
Fig. 3 is the close-up schematic view of the A of the fully-automatic series water meter verification assay device of the present invention；
Fig. 4 is the structural representation of the conduction pipe of the fully-automatic series water meter verification assay device of the present invention；
Fig. 5 is the rearview of the fully-automatic series water meter verification assay device of the present invention；
Fig. 6 is the structural representation of the flow control valve of the fully-automatic series water meter verification assay device of the present invention；
Fig. 7 is the schematic diagram of the front view of the Ball valve valve element of the fully-automatic series water meter verification assay device of the present invention；
Fig. 8 is a left side for the Ball valve valve element of the flow control valve of the fully-automatic series water meter verification assay device of the present invention
The schematic diagram of view.
Description of the drawings：1st, device body, 2, PLC, 3, water tank, 4, image collecting device, 5, water pipe, 6, water meter
Frame, 7, water meter fixture, 71, conduction pipe, 711, conducting tube body, 712, supporting part, 8, telescopic cylinder, 9, water pump, 10, frequency conversion
Device, 11, vacuum tank, 12, pressure transducer, 13, water chiller, 14, immersible pump, 15, temperature sensor, 16, electronic scale restatement,
17th, flow control valve, 171, servomotor, 172, shaft coupling, 173, zero point positioner, 174, Ball valve, 175, manhole,
176. microflute.
Specific embodiment
As shown in drawings, a kind of fully-automatic series water meter verifies assay device, including device body 1, PLC 2, folder
Table mechanism, constant pressure mechanism, constant temperature mechanism, flow control valve 17, water tank 3, image collecting device 4 and water pipe 5, the meter clamping mechanism
Including water gage bracket 6, water meter fixture 7 and telescopic cylinder more than 8, the water gage bracket 6 is arranged on device body 1, the flexible gas
The cylinder body of cylinder 8 is on water gage bracket 6, and the water meter fixture 7 is arranged on the telescopic end of telescopic cylinder 8, the water meter fixture 7
Conduction pipe 71 is provided with, the constant pressure mechanism includes water pump 9, converter 10, vacuum tank 11 and pressure transducer 12, the water pump
9th, vacuum tank 11 and pressure transducer 12 are serially connected on water pipe 5, and the pressure transducer 12 is also electrically connected with PLC 2, institute
State PLC 2 to be also sequentially connected electrically with converter 10 and water pump 9, the constant temperature mechanism includes water chiller 13,14 and of immersible pump
Temperature sensor 15, the immersible pump 14 is located in water tank 3 and is connected with water chiller 13, and the temperature sensor 15 is located at water tank
In 3, the water chiller 13, immersible pump 14 and temperature sensor 15 are all electrically connected with PLC 2, the flow control valve 17
It is serially connected on water pipe 5 and is connected with PLC 2, also include electronic scale restatement 16, electronic scale restatement 16 is arranged on device body
On 1 and with 5 UNICOM of water pipe；The conduction pipe 71 includes to turn on tube body 711 and supporting part 712, and the supporting part 712 is arc
And be connected with the lower opening portion of conducting tube body 711；The conducting tube body 711 and supporting part 712 are formed in one structure；Institute
Stating flow control valve 17 includes the Ball valve 174 comprising valve element and valve element connecting rod being connected on water pipe, described for driving
The servomotor 171 of Ball valve and zero point positioner 173, and for connecting the servo motor output shaft with the Ball valve
Valve element connecting rod shaft coupling 172,174 closed mode of the servomotor orientates zero point as, and by the feedback of status to being watched
The aperture that motor 171 controls the Ball valve 174 so as to the servomotor 171 is taken, the valve element top is provided with groove, described
The valve element connecting rod lower end of Ball valve 174 is placed in groove 177；The valve element of the Ball valve 174 has circular logical for a center
The spheroid in hole 175, the valve element has the microflute 176 that several are easy to current to pass through on ball internal chamber wall, the microflute 176 with
The manhole 175 is communicated；The diameter of the manhole 175 of the valve element is less than the diameter of outlet；The microflute 176 is
" V " type；The microflute 176 is distributed on the ball lumen circumference, and quantity is 1-3；The microflute 176 be 2 symmetrical
" V " type groove.
In the specific implementation, PLC is existed by controlling immersible pump that the water in water tank and water chiller are carried out heat exchange
While ensureing T30 standard, the water temperature in water tank is controlled at 25 degree or so, water meter to be measured is directly placed on water meter fixture
Supporting part on, water meter to be measured is clamped by PLC control telescopic cylinder by water meter fixture, and PLC is by zero point
Servomotor being opened after the feedback of localizer, and then Ball valve is opened by shaft coupling by servomotor, passes through after opening
The list being preset in PLC selects corresponding flow velocity, and current are flowed in electronic scale restatement by water pipe conduction pipe and water meter, the water
Pressure transducer on pipe, manostat, converter and water pump are all connected with PLC, and PLC passes through pressure sensing
Pressure feedback on device adjusts pump working so as to adjust manostat and by converter, and then the pressure for adjusting in water pipe is caused
Pressure is in preset value, and in the case that pressure and water temperature and flow velocity are all stablized, PLC captures image collecting device
Collection picture, realizes angle proportional algorithm by the deflection angle of pointer, so as to realize the calculating of error；When calculating the flow velocity
Under error when, further adjust the rotation of servomotor, so as to change flow velocity further, measure the mistake of next flow velocity node
Difference.
Such design presence is advantageous in that：First, by servomotor, zero point positioner, Ball valve and microflute it
Between cooperation can allow flow velocity adjustment node from original distributing measurement formed seriality measurement.
Secondly, the pressure in water pipe can be caused by the cooperation between pressure transducer, converter, water pump and vacuum tank
Keep constant, while the cooperation of water chiller, immersible pump and water tank can cause the water flow temperature in water pipe to keep constant, so that
The parameters for obtaining the current to be measured in water pipe keep stable, so that the fixed stability of water meter amount.
Again, by the data of image acquisition device be no longer pointer swing circle, but the deflection angle of pointer
Degree, using the ratio calculation error between deflection angle and predetermined deflection angle.
Furthermore, water gage bracket by water meter fixture, conducting tube body and supporting part between cooperation cause water meter put and
The work extremely convenient of clamp, greatly improves the efficiency of water pump composite to be measured.
In view of the foregoing it is apparent that the present invention fully-automatic series water meter verification assay device install and measure error with
And the mode of calculation error compare existing at present be extremely improved for the mode of water meter verification and improve, for water
For table dispatches from the factory, the quantitative requirement of personnel is not only greatly reduced while also improving the verification quantity of water meter.
Above the present invention and embodiments thereof are described, the description do not have restricted, shown in accompanying drawing also only
It is one of embodiments of the present invention, actual structure is not limited thereto.If the generally speaking ordinary skill people of this area
Member is enlightened by which, in the case of without departing from the invention objective, similar to the technical scheme without designing for creativeness
Frame mode and embodiment, protection scope of the present invention all should be belonged to.
Claims (8)
1. a kind of fully-automatic series water meter verifies assay device, including device body (1), PLC (2), meter clamping mechanism, perseverance
Press mechanism, constant temperature mechanism, flow control valve (17), water tank (3), image collecting device (4) and water pipe (5), the meter clamping mechanism
Multiple including water gage bracket (6), water meter fixture (7) and telescopic cylinder (8), described water gage bracket (6) are arranged on device body (1),
The cylinder body of telescopic cylinder (8) is on water gage bracket (6), and described water meter fixture (7) are installed in the flexible of telescopic cylinder (8)
On end, water meter fixture (7) are provided with conduction pipe (71), and the constant pressure mechanism includes water pump (9), converter (10), voltage stabilizing
Tank (11) and pressure transducer (12), water pump (9), vacuum tank (11) and pressure transducer (12) are serially connected on water pipe (5),
Pressure transducer (12) are also electrically connected with PLC (2), PLC (2) also with converter (10) and water pump
(9) it is sequentially connected electrically, the constant temperature mechanism includes water chiller (13), immersible pump (14) and temperature sensor (15), the diving
Pump (14) is located in water tank (3) and is connected with water chiller (13), and temperature sensor (15) are located in water tank (3), described cold
Hydrophone (13), immersible pump (14) and temperature sensor (15) are all electrically connected with PLC (2), flow control valve (17)
It is serially connected in water pipe (5) above and is connected with PLC (2), also include electronic scale restatement (16), electronic scale restatement (16) is arranged on
Device body (1) upper and with water pipe (5) UNICOM.
2. fully-automatic series water meter according to claim 1 verifies assay device, it is characterised in that：Conduction pipe (71)
Including turning on tube body (711) and supporting part (712), described supporting part (712) be arc and with turn on opening for tube body (711)
The connection of mouth bottom.
3. fully-automatic series water meter according to claim 2 verifies assay device, it is characterised in that：The conducting tube body
(711) it is formed in one structure with supporting part (712).
4. fully-automatic series water meter according to claim 1 verifies assay device, it is characterised in that：The flow control valve
(17) include the Ball valve comprising valve element and valve element connecting rod (174) being connected on water pipe, be used for driving the Ball valve
Servomotor (171) and zero point positioner (173), and for connecting the valve of the servo motor output shaft and the Ball valve
The shaft coupling (172) of core connecting rod, servomotor (174) closed mode orientates zero point as, and the feedback of status is watched
The aperture that motor (171) controls Ball valve (174) so as to described servomotor (171) is taken, the valve element top is provided with recessed
Groove, the valve element connecting rod lower end of Ball valve (174) is placed in groove (177)；The valve element of Ball valve (174) be one in
The heart has the spheroid of manhole (175), and the valve element has the microflute that several are easy to current to pass through on ball internal chamber wall
(176), described microflute (176) communicate with the manhole (175).
5. fully-automatic series water meter according to claim 4 verifies assay device, it is characterised in that：The circle of the valve element
The diameter of through hole (175) is less than the diameter of outlet.
6. fully-automatic series water meter according to claim 4 verifies assay device, it is characterised in that：Microflute (176)
For " V " type.
7. fully-automatic series water meter according to claim 4 verifies assay device, it is characterised in that：Microflute (176)
It is distributed on the ball lumen circumference, quantity is 1-3.
8. fully-automatic series water meter according to claim 4 verifies assay device, it is characterised in that：Microflute (176)
For 2 symmetrical " V " type grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610960701.9A CN106441521A (en) | 2016-11-04 | 2016-11-04 | Full-automatic serial connection water meter verification and calibration device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610960701.9A CN106441521A (en) | 2016-11-04 | 2016-11-04 | Full-automatic serial connection water meter verification and calibration device |
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| CN106441521A true CN106441521A (en) | 2017-02-22 |
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ID=58179743
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| CN201610960701.9A Pending CN106441521A (en) | 2016-11-04 | 2016-11-04 | Full-automatic serial connection water meter verification and calibration device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107101700A (en) * | 2017-06-02 | 2017-08-29 | 广东青藤环境科技有限公司 | A kind of test device for radio remote transmitting water meter |
| CN108871513A (en) * | 2018-07-27 | 2018-11-23 | 郑州圻心智能设备有限公司 | A kind of number row water meters in series connection intelligent measurement machine |
| CN111879382A (en) * | 2020-08-13 | 2020-11-03 | 安徽宝龙富乐能源计量有限公司 | Ultrasonic water meter detection device control cabinet |
| CN111982252A (en) * | 2020-08-30 | 2020-11-24 | 安徽宝龙富乐能源计量有限公司 | Water meter test board |
| CN117490809A (en) * | 2023-12-19 | 2024-02-02 | 成都秦川物联网科技股份有限公司 | Ultrasonic gas meter testing method for intelligent production and industrial Internet of things system |
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