CN220772267U - Radar flowmeter with wind speed monitoring function - Google Patents
Radar flowmeter with wind speed monitoring function Download PDFInfo
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- CN220772267U CN220772267U CN202321845242.1U CN202321845242U CN220772267U CN 220772267 U CN220772267 U CN 220772267U CN 202321845242 U CN202321845242 U CN 202321845242U CN 220772267 U CN220772267 U CN 220772267U
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Abstract
A radar flowmeter with wind speed monitoring comprises a lower shell; installing a flow rate radio frequency board for realizing actual flow rate measurement; an upper housing assembly; the upper end of the lower shell is fixed on the upper end of the lower shell through a plurality of support columns; the ultrasonic wind speed probes are arranged at the lower end of the upper shell component and are opposite to the lower shell; the liquid level radio frequency plate is arranged in the lower shell, and the end face of the liquid level radio frequency plate is vertically downward and used for measuring the liquid level depth; and the horizontal bubble instrument is arranged on the upper plane of the lower shell and used for horizontal calibration. The utility model has compact and reasonable structure and convenient operation, can monitor the size and the direction of wind in the environment in real time by arranging the ultrasonic wind speed monitoring sensor on the radar flowmeter, and can offset and smooth the influence of the radar on the water surface flow velocity according to the wind speed after the wind speed sensor recognizes the wind speed and the direction by processing the data, thereby finally giving out relatively accurate actual flow velocity. Through monitoring and calculation of wind speed, the measured value of the radar flowmeter is more close to the true value.
Description
Technical Field
The utility model relates to the technical field of measurement, in particular to a radar flowmeter with wind speed monitoring.
Background
Radar flowmeters are electronic devices that detect a target using electromagnetic waves. The device is mainly used for water conservancy monitoring, sewage treatment, flood control and early warning and the like. The radar flowmeter for hydrology is mainly used for hydrology and water conservancy detection work of rivers, ditches, irrigation and the like.
In the process of monitoring and managing water resources, the monitoring data of water flow in the places such as river channels, open channels, irrigation channels, underground drainage pipes, flood prevention early warning and the like are important basis for decision making. The radar flowmeter has the characteristics of non-contact and spaced detection, is not influenced by temperature, haze, sediment, floaters, terrain and the like, and has strong adaptability. However, in practice, radar flowmeters have been found to be susceptible to wind in the environment. The radar flowmeter measures the water surface flow rate, and can normally measure under the windless condition. However, in windy conditions, wind affects the surface flow rate of water, so that the flow rate measured by the radar flowmeter does not match the actual flow rate.
For this purpose, we propose a radar flowmeter with wind speed monitoring.
Disclosure of Invention
The applicant provides a radar flowmeter with wind speed monitoring aiming at the defects in the prior art, and the size and the direction of environmental wind can be monitored in real time by arranging an ultrasonic wind speed monitoring sensor on the radar flowmeter, after the wind speed sensor recognizes the wind speed and the direction, the radar can offset and smooth the influence of the wind speed on the water surface flow velocity according to the wind speed after processing the data, and finally the relatively accurate actual flow velocity is given.
The technical scheme adopted by the utility model is as follows:
a radar flow meter with wind speed monitoring, comprising: a lower case; one side of the device is provided with an inclined through hole, and a flow velocity cover plate is arranged on the inclined through hole; a flow rate radio frequency board is arranged on the inner side of the flow rate cover plate and is used for realizing actual flow rate measurement; an upper housing assembly; the upper end of the lower shell is fixed on the upper end of the lower shell through a plurality of support columns; the ultrasonic wind speed probes are arranged at the lower end of the upper shell component and are opposite to the lower shell; the liquid level radio frequency plate is arranged in the lower shell, and the end face of the liquid level radio frequency plate is vertically downward and used for measuring the liquid level depth; and the horizontal bubble instrument is arranged on the upper plane of the lower shell and used for horizontal calibration.
It is further characterized by:
the lower shell is of a right trapezoid structure, and the angle of the bevel edge of the lower shell is 45 degrees.
The flow velocity cover plate is provided with a flow velocity pressing plate made of metal, through holes, counter bores and screw holes with consistent hole positions are respectively formed in the flow velocity cover plate, the flow velocity pressing plate and the inclined plane of the lower shell, the through holes, the counter bores and the screw holes are fixed through screws, a sealing ring groove is formed in the joint of the inclined plane through holes on the lower shell and the flow velocity cover plate, a sealing ring is arranged in the sealing ring groove, and a pressure sealing ring table is arranged at the position corresponding to the flow velocity cover plate.
The upper shell assembly can be divided into an upper shell upper cover and an upper shell lower cover, a through hole is formed in the upper shell lower cover, a support column penetrates through the through hole and is fixed in the upper shell lower cover by a hexagonal nut, and a sealing ring is arranged between the support column and the plane of the upper shell lower cover; the support column is hollow steel pipe, and the connecting wire of ultrasonic wind speed probe passes the support column and to inferior valve inner chamber and connect wind speed circuit board.
The liquid level cover plate opposite to the liquid level radio frequency plate is arranged on the lower bottom plane of the lower shell, the liquid level cover plate is made of plastic, and the middle part of the inner side of the liquid level cover plate is hemispherical and inwards bulges to play a role of a radar lens.
The liquid level cover plate is provided with a liquid level pressing plate made of metal materials, through holes, counter bores and screw holes with consistent hole positions are respectively formed in the liquid level cover plate, the liquid level pressing plate and the lower bottom plane, the liquid level pressing plate, the counter bores and the screw holes are fixed through screws, a sealing ring groove is formed in the lower bottom plane of the lower shell, a sealing ring is arranged in the sealing ring groove, and a pressing sealing ring table is arranged at the position corresponding to the liquid level cover plate.
The liquid level radio frequency board realizes the radar ranging function, and the calculation formula is as follows:
d＝H-h
wherein d represents the water level, H represents the setting of the low level, H represents the empty height, f D Representing the frequency of the intermediate frequency signal, T representing the period, and B representing the bandwidth.
The flow velocity radio frequency board realizes a radar speed measurement function module, and the calculation formula is as follows:
f D ＝2vf 0 /c
wherein f d Represents Doppler frequency, v represents water surface flow velocity, f 0 Representing the carrier frequency.
The ultrasonic wind speed probe realizes the function of ultrasonic wind speed and wind direction measurement, and the calculation formula is as follows:
in the formula, cor (m) represents the correlation degree of a group of correlation signals at m time points, the correlation signal time delay is calculated according to the correlation degree, the wind speed is calculated, and then the wind direction is calculated according to the trigonometric function relation of the two groups of signals.
The ultrasonic flow velocity measuring device comprises a lower shell, and is characterized by further comprising a main control board, wherein the main control board is fixed inside the lower shell through an installation table and is electrically connected with an ultrasonic wind velocity probe, a flow velocity radio frequency board and a liquid level radio frequency board respectively, so that flow velocity measurement is realized.
The beneficial effects of the utility model are as follows:
the utility model has compact and reasonable structure and convenient operation, and can monitor the size and the direction of environmental wind in real time by arranging the ultrasonic wind speed monitoring sensor on the radar flowmeter. When wind blows along the water flow direction, the flow velocity of the water surface is larger than the actual value, when wind blows against the water flow direction, the flow velocity of the water surface is smaller than the actual value, after the wind speed sensor recognizes the wind speed and the direction, the radar counteracts and smoothes the influence of the wind speed on the flow velocity of the water surface according to the data after recognizing the wind speed and the direction, and finally the relatively accurate actual flow velocity is given. Through monitoring and calculation of wind speed, the measured value of the radar flowmeter is more close to a true value, and the result is of great significance to monitoring of an environmental river basin affected by high wind.
Meanwhile, the utility model has the following advantages:
1. the lower shell of the flowmeter main body is a radar flowmeter module, and the upper shell is an anemometer module. And after the data is processed, the radar counteracts and smoothes the influence of the wind speed on the water surface flow velocity, and finally gives a relatively accurate actual flow velocity.
2. The wind speed probe of the anemometer module is designed at the bottom of the upper shell, so that the probe is not easy to be blocked by sediment, sand and sundries, and the probe is not damaged or blocked in severe weather such as rain, snow, hail and the like. The probe can work normally in all weather.
3. The material of the flow velocity cover plate and the liquid level cover plate of the radar flowmeter is polytetrafluoroethylene material, and the material has lower dielectric constant, stronger penetrability and smaller loss for radar waves, so that the radar signal sending performance is enhanced. And polytetrafluoroethylene has self-lubricating property (self-cleaning property), dirt and rainwater are not easy to adhere to the surface of the polytetrafluoroethylene, and the interference of water drops generated by condensation of rainwater and dew on signals is effectively avoided.
4. The functions of radar liquid level measurement, radar flow velocity measurement and ultrasonic wind speed measurement are integrated, accurate section flow can be calculated in a severe environment, a hydraulic section flow calculation model is embedded, and a flow calculation result is accurate.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a schematic cross-sectional view of the present utility model.
Fig. 3 is a functional flow chart of the present utility model.
Fig. 4 is a functional application diagram of the present utility model.
Wherein: 1. installing a hanging frame; 2. an upper cover of the upper case; 3. an upper case lower cover; 4. an ultrasonic wind speed probe; 5. a support column; 6. a lower case; 7. a main control board; 8. a liquid level radio frequency plate; 9. an aviation connector; 10. a liquid level cover plate; 11. a liquid level pressure plate; 12. a wind speed circuit board; 13. a horizontal bubble meter; 14. a flow rate cover plate; 15. a flow rate pressure plate; 16. a flow rate radio frequency board; 17. waterproof ventilation valve.
Detailed Description
The following describes specific embodiments of the present utility model with reference to the drawings.
As shown in fig. 1-2, the embodiment discloses a radar flowmeter with wind speed monitoring, and the structural design key points are as follows:
as shown in fig. 2, the lower shell 6 has a right trapezoid structure, the angle of the inclined edge is 45 °, a flow velocity cover plate 14 made of plastic material is mounted on the inclined surface of 45 ° below the lower shell 6, and a flow velocity pressing plate 15 made of metal material is mounted on the flow velocity cover plate 14. The flow velocity cover plate 14, the flow velocity pressing plate 15 and the 45-degree inclined planes of the lower shell 6 are respectively provided with a through hole, a counter bore and a screw hole with consistent hole positions, and the flow velocity cover plate, the flow velocity pressing plate 15 and the lower shell are fixed through screws. A sealing ring groove is arranged on a 45-degree inclined plane below the lower shell 6, a sealing ring is arranged in the sealing ring groove, a pressing sealing ring table is arranged at a position corresponding to the flow velocity cover plate 14, and sealing at the position is realized by pressing the sealing ring.
Mounting screw holes are provided on the inside of the flow rate cover plate 14 for mounting the flow rate radio frequency plate 16. The flow rate radio frequency plate 16 is installed parallel to the flow rate cover plate 14, so that an included angle of 45 degrees is formed between the flow rate radio frequency plate 16 and the bottom surface of the lower shell 6, and signal measurement and transmission are facilitated.
A liquid level cover plate 10 made of plastic material is arranged on the lower bottom plane of the lower shell 6, and a liquid level pressure plate 11 made of metal material is arranged on the liquid level cover plate 10. The liquid level cover plate 10, the liquid level pressure plate 11 and the lower bottom plane are respectively provided with a through hole, a counter bore and a screw hole with consistent hole positions, and the three are fixed through screws.
A sealing ring groove is arranged on the plane of the lower bottom of the lower shell 6, a sealing ring is arranged in the sealing ring groove, a pressing sealing ring table is arranged at the position corresponding to the liquid level cover plate 10, and sealing at the position is realized by pressing the sealing ring.
In this embodiment, as shown in fig. 2, the middle part of the inner side of the liquid level cover plate 10 is hemispherical and protrudes inwards, so as to act as a radar lens.
An installation table is arranged in the upper plane of the lower shell 6, a main control board 7 is installed on the installation table, a liquid level radio frequency board 8 is installed on the main control board 7, and the center of a radio frequency chip of the liquid level radio frequency board 8 is opposite to the center of a radar lens on the liquid level cover board 10.
The upper plane of the lower shell 6 is provided with a through hole, the support column 5 is inserted into the through hole, the inside of the lower shell 6 is fixed through a hexagonal nut, a sealing ring is arranged between the support column 5 and the upper plane of the lower shell 6, and the sealing is realized by pressing the sealing ring. The support column 5 is provided with an anti-slip groove so that it can be screwed up by means of a wrench during the installation process.
An upper case assembly is provided on the support column 5, and the upper case assembly may be divided into an upper case upper cover 2 and an upper case lower cover 3. The upper shell lower cover 3 is provided with a through hole, the support column 5 passes through the through hole and is fixed in the upper shell lower cover 3 by a hexagonal nut. A sealing ring is arranged between the support column 5 and the plane of the upper shell lower cover 3, and the sealing is realized by pressing the sealing ring.
The upper plane of the lower shell 6 is also provided with a hole groove for installing the horizontal bubble meter 13, and the horizontal bubble meter 13 can be installed for horizontal calibration in real time, so that the measurement precision is improved.
4 groups of uniformly distributed stepped holes which are inclined downwards by 45 degrees are formed in the upper shell lower cover 3, an ultrasonic wind speed probe is arranged in each stepped hole, the 4 groups of probes are symmetrical in pairs to form two groups of receiving and transmitting probes, the wave emitted by the transmitting probes is reflected on the upper plane of the lower shell 6, and the reflected wave is just received by the receiving probes.
The support column 5 is hollow steel pipe, and the connecting wire of four groups of probes passes support column 5 to inferior valve 6 inner chamber, inserts on the wind speed circuit board 12. A mounting hole site is provided on the inner side of the lower case 6 in a plane for mounting the wind speed circuit board 12.
The upper part of the stepped hole in the upper shell lower cover 3 is provided with an inward concave step for filling sealant, and the probe is fixed and sealed in an adhesive manner.
The upper plane of the upper shell lower cover 3 is provided with a sealing ring groove for placing a sealing ring. The corresponding position on the upper cover 2 of the upper shell is provided with a sealing ring pressing table, the upper shell 6 and the lower shell are fixedly connected through screws, and the sealing rings are extruded to form the position seal.
The specific connection is as follows:
the installation hanging frame 1 is installed on the lower shell 6, the lower shell 6 is provided with corresponding hole sites, and the installation hanging frame 1 is installed on the lower shell 6 by using screws;
the upper shell upper cover 2 is connected and installed on the upper shell lower cover 3 through screws, and the upper shell upper cover 2 and the upper shell lower cover 3 are sealed through O-shaped sealing rings.
The ultrasonic wind speed probe 4 is arranged on the upper shell lower cover 3, the ultrasonic wind speed probe 4 is fixed on the upper shell lower cover 3 through pouring sealant, and the pouring sealant plays a role in fixing and sealing;
the support column 5 is connected with the upper shell lower cover 3 and the lower shell 6, two ends of the support column are fixed through hexagonal nuts, and a sealing ring is arranged at the connecting position;
the main control board 7 is fixed on the lower shell 6 through screw installation;
the liquid level radio frequency board 8 is fixedly arranged on the main control board 7 through screws;
the liquid level pressure plate 11 and the liquid level cover plate 10 are fixedly arranged on the lower shell 6 through screws, and the liquid level cover plate 10 and the lower shell 6 are sealed through O-shaped sealing rings.
The flow rate cover plate 14 and the flow rate pressing plate 15 are fixedly arranged on the lower shell 6 through screws, and the flow rate cover plate 14 and the lower shell 6 are sealed through O-shaped sealing rings.
The flow rate radio frequency plate 16 is fixedly mounted on the flow rate cover plate 14 through screws;
the wind speed circuit board 12 is fixedly mounted on the lower shell 6 through screws;
the horizontal bubble meter 13 is fixed on the lower shell 6 through glue installation;
the aviation connector 9 is also arranged, the aviation connector 9 is fixedly arranged on the lower shell 6 through threaded connection, and a sealing ring is arranged at the connection part, so that the docking with the outside is facilitated;
the cable of the ultrasonic wind speed probe 4 is connected to a wind speed circuit board 12;
the wind speed circuit board 12 is connected with the liquid level radio frequency board 8 through a flat cable;
the flow velocity radio frequency plate 16 is connected with the liquid level radio frequency plate 8 through a flat cable;
the main control board 7 is connected with the liquid level radio frequency board 8 through a connector;
the waterproof ventilation valve 17 is installed and fixed on the lower shell 6 through threaded connection, a sealing ring is arranged at the joint, and the waterproof ventilation valve 17 has the functions of waterproof ventilation and balancing internal and external air pressure;
the device functions as shown in fig. 4, the device includes three functional modules:
1. and a radar ranging function module. Electromagnetic waves are emitted perpendicular to the water surface through the liquid level radio frequency plate 8, and based on the FMCW principle, the intermediate frequency is obtained through measurement, so that the empty height and the water level are calculated. The calculation formula is as follows:
d＝H-h
wherein d represents the water level, H represents the setting of the low level, H represents the empty height, f D Representing the frequency of the intermediate frequency signal, T representing the period, and B representing the bandwidth.
2. And the radar speed measuring function module. And emitting electromagnetic waves obliquely downwards at 45 degrees, and calculating according to the echo Doppler frequency to obtain the water surface flow velocity. The calculation formula is as follows:
f D ＝2vf 0 /c
wherein f d Represents Doppler frequency, v represents water surface flow velocity, f 0 Representing the carrier frequency.
3. And the ultrasonic wind speed and direction measuring function module. The wind speed and the wind direction of the water level are measured and calculated through two groups of correlation ultrasonic transducers. The calculation formula is as follows:
where Cor (m) represents the correlation of a set of correlation signals at the m-time points. And accordingly, correlation signal time delay is calculated, and wind speed is calculated. And then, the wind direction is calculated according to the trigonometric function relation of the two groups of signals.
The device simulates correction parameters of preset wind speed to flow speed according to CFD, and optimizes the correction parameters according to a smooth result of Kalman filtering to the flow speed. Meanwhile, under the condition of unstable wind speed and wind direction in strong wind weather, abnormal flow velocity is removed, stable flow velocity output is ensured, and erroneous judgment is avoided.
The classical hydraulic flow calculation model is embedded in the device, the high-accuracy section flow is calculated according to the measured water surface flow velocity v, the measured water level height d and the preset section width, and a specific working flow is shown in figure 3.
1. The lower shell 6 of the flowmeter main body is a radar flowmeter module, and the upper shell is an anemometer module. And after the data is processed, the radar counteracts and smoothes the influence of the wind speed on the water surface flow velocity, and finally gives a relatively accurate actual flow velocity.
2. The wind speed probe of the anemometer module is designed at the bottom of the upper shell, so that the probe is not easy to be blocked by sediment, sand and sundries, and the probe is not damaged or blocked in severe weather such as rain, snow, hail and the like. The probe can work normally in all weather.
3. The material of the flow velocity cover plate 14 and the liquid level cover plate 10 (radar lens) of the radar flowmeter is polytetrafluoroethylene material, and the material has low dielectric constant, strong penetrability and small loss for radar waves, so that the radar signal sending performance is enhanced. And polytetrafluoroethylene has self-lubricating property (self-cleaning property), dirt and rainwater are not easy to adhere to the surface of the polytetrafluoroethylene, and the interference of water drops generated by condensation of rainwater and dew on signals is effectively avoided.
4. The functions of radar liquid level measurement, radar flow velocity measurement and ultrasonic wind speed measurement are integrated, accurate section flow can be calculated in a severe environment, a hydraulic section flow calculation model is embedded, and a flow calculation result is accurate.
Based on the defect that the current radar flowmeter is easily affected by wind in the environment, the patent provides the radar flowmeter with the wind speed monitoring function. The novel radar flowmeter is provided with an ultrasonic wind speed monitoring sensor, so that the size and the direction of environmental wind can be monitored in real time. When wind blows along the water flow direction, the flow velocity of the water surface is larger than the actual value, when wind blows against the water flow direction, the flow velocity of the water surface is smaller than the actual value, after the wind speed sensor recognizes the wind speed and the direction, the radar counteracts and smoothes the influence of the wind speed on the flow velocity of the water surface according to the data after recognizing the wind speed and the direction, and finally the relatively accurate actual flow velocity is given. Through monitoring and calculation of wind speed, the measured value of the radar flowmeter is more close to a true value, and the result is of great significance to monitoring of environmental watershed affected by high winds, such as eastern typhoons and western high wind weather environmental watershed.
The above description is intended to illustrate the utility model and not to limit it, the scope of which is defined by the claims, and any modifications can be made within the scope of the utility model.
Claims (7)
1. A radar flowmeter with wind speed monitoring, comprising:
a lower case (6); one side of the device is provided with an inclined through hole, and a flow velocity cover plate (14) is arranged on the inclined through hole;
a flow rate radio frequency plate (16) is arranged on the inner side of the flow rate cover plate (14) and is used for realizing actual flow rate measurement;
an upper housing assembly; the upper end of the lower shell (6) is fixed by a plurality of support columns (5);
the ultrasonic wind speed probes (4) are arranged at the lower end of the upper shell assembly and are opposite to the lower shell (6) to realize wind speed measurement;
the liquid level radio frequency plate (8) is arranged in the lower shell (6) and the end surface of the liquid level radio frequency plate is vertically downward and used for measuring the liquid level depth;
and the horizontal bubble instrument (13) is arranged on the upper plane of the lower shell (6) and used for horizontal calibration.
2. A radar flowmeter with wind speed monitoring as set forth in claim 1, wherein: the lower shell (6) is of a right trapezoid structure, and the angle of the bevel edge of the lower shell is 45 degrees.
3. A radar flowmeter with wind speed monitoring as set forth in claim 2, wherein: the flow velocity cover plate (14) is provided with a flow velocity pressing plate (15) made of metal, through holes, counter bores and screw holes with consistent hole positions are respectively formed in the inclined planes of the flow velocity cover plate (14), the flow velocity pressing plate (15) and the lower shell (6), the through holes, the counter bores and the screw holes are fixed through screws, a sealing ring groove is formed in the joint of the inclined plane through holes on the lower shell (6) and the flow velocity cover plate (14), a sealing ring is arranged in the sealing ring groove, and a pressing sealing ring table is arranged at the position corresponding to the flow velocity cover plate (14).
4. A radar flowmeter with wind speed monitoring as set forth in claim 1, wherein: the upper shell assembly can be divided into an upper shell upper cover (2) and an upper shell lower cover (3), a through hole is formed in the upper shell lower cover (3), a support column (5) penetrates through the through hole and is fixed in the upper shell lower cover (3) by a hexagonal nut, and a sealing ring is arranged between the support column (5) and the plane of the upper shell lower cover (3);
the support column (5) is a hollow steel tube, and a connecting wire of the ultrasonic wind speed probe (4) passes through the support column (5) to the inner cavity of the lower shell (6) and is connected with the wind speed circuit board (12).
5. A radar flowmeter with wind speed monitoring as set forth in claim 1, wherein: the liquid level cover plate (10) opposite to the liquid level radio frequency plate (8) is arranged on the lower bottom plane of the lower shell (6), the liquid level cover plate (10) is made of plastic, and the middle part of the inner side is hemispherical and inwards raised to play a role of a radar lens.
6. A radar flowmeter with wind speed monitoring as set forth in claim 5, wherein: the liquid level cover plate is characterized in that a liquid level pressing plate (11) made of metal is arranged on the liquid level cover plate (10), through holes, counter bores and screw holes with consistent hole positions are respectively formed in the liquid level cover plate (10), the liquid level pressing plate (11) and the lower bottom plane, the liquid level pressing plate, the counter bores and the screw holes are fixed through screws, a sealing ring groove is formed in the lower bottom plane of the lower shell (6), a sealing ring is arranged in the sealing ring groove, and a pressing sealing ring table is arranged at the position corresponding to the liquid level cover plate (10).
7. A radar flowmeter with wind speed monitoring as set forth in claim 1, wherein: the ultrasonic flow velocity measuring device is characterized by further comprising a main control board (7), wherein the main control board (7) is fixed inside the lower shell (6) through an installation table, and the main control board (7) is electrically connected with the ultrasonic wind velocity probe (4), the flow velocity radio frequency board (16) and the liquid level radio frequency board (8) respectively to realize flow velocity measurement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321845242.1U CN220772267U (en) | 2023-07-13 | 2023-07-13 | Radar flowmeter with wind speed monitoring function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321845242.1U CN220772267U (en) | 2023-07-13 | 2023-07-13 | Radar flowmeter with wind speed monitoring function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220772267U true CN220772267U (en) | 2024-04-12 |
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ID=90598341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321845242.1U Active CN220772267U (en) | 2023-07-13 | 2023-07-13 | Radar flowmeter with wind speed monitoring function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220772267U (en) |
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2023
- 2023-07-13 CN CN202321845242.1U patent/CN220772267U/en active Active
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