CN111220818B - Device for calibrating speed measurement precision of Doppler current meter - Google Patents
Device for calibrating speed measurement precision of Doppler current meter Download PDFInfo
- Publication number
- CN111220818B CN111220818B CN201911255344.6A CN201911255344A CN111220818B CN 111220818 B CN111220818 B CN 111220818B CN 201911255344 A CN201911255344 A CN 201911255344A CN 111220818 B CN111220818 B CN 111220818B
- Authority
- CN
- China
- Prior art keywords
- current meter
- tube
- flow
- peristaltic pump
- film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
- G01P21/02—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers
- G01P21/025—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers for measuring speed of fluids; for measuring speed of bodies relative to fluids
Abstract
The invention provides a device for calibrating the speed measurement precision of a Doppler current meter, which comprises an upright tube, a circular tube, a film, a locking ring, a grating, a flow suction tube, a peristaltic pump, a flow outlet tube, a control circuit and a support, wherein the upright tube penetrates through the upper part of a working section of a vertical circulating water tank, the circular tube is positioned on the side part of the upright tube, the film is positioned at the front part of the circular tube, the locking ring is positioned on the outer side of the film, the grating is positioned outside the upright tube, the flow suction tube is positioned at the front part of the film, one end of the peristaltic pump is connected with the flow suction tube, the other end of the peristaltic pump is connected with the flow outlet tube, the control circuit is connected with a power switch of the peristaltic pump, and the support is positioned inside the upright tube; this mark device of doppler current meter precision that tests speed utilizes the film to keep apart rivers to the impact of doppler current meter, utilizes the initiative technique of inhaling to flow to reduce the anterior higher pulsating pressure of film, solves because of doppler current meter receives fluid pulsating pressure and fluid and breaks away from the flutter effect problem that leads to in the test procedure, improves the speed and the calibration precision of doppler current meter.
Description
Technical Field
The invention relates to a device for calibrating speed measurement precision of a Doppler current meter, and belongs to the field of acoustic measurement.
Background
In recent years, with the implementation of ocean strategy, the calibration work of the performance of ocean instruments is more and more emphasized. In 2016, the national department of science and technology has reiterated the project of "ocean sound detection key measurement standard and traceability technology research" (approval number: 2016YFF0200900), and one of the subjects set in the project is to establish a device for accurately calibrating the speed measurement precision of a Doppler current meter in a laboratory. The Doppler current meter is placed in the working section of the vertical circulating water tank according to the basic design idea, the flow velocity measured by the Doppler current meter is calibrated by utilizing the flow velocity measured by the laser Doppler velocimeter, the measurement precision is higher due to the fact that the optical wavelength is much shorter than the acoustic wave, and the calibration of the speed measurement precision of the Doppler current meter can be completed. However, during the calibration, the following problems are also found:
firstly, because the acoustic probe position of the doppler current meter is a stationary point of flow, and is subjected to a large turbulent fluctuation pressure, the rubber material at the acoustic probe position is subjected to the pressure, and then the density and the sound velocity change, and further the transmitting and receiving sensitivity of the acoustic probe is changed, which is also the root cause that the velocity measurement accuracy value of the doppler current meter is always slightly fluctuated in the measurement process. Therefore, to accurately calibrate the velocity measurement performance of a doppler current meter, consideration must be given to how to reduce the large turbulent pulse pressure at its sonic probe.
Second, when water flows through the doppler current meter, periodic or quasi-periodic shedding vortices are formed at the trailing end of the current meter. Under the excitation of the shedding vortex, the doppler current meter vibrates, so that the area detected by the acoustic probe cannot be focused at a specific position, and the flow velocity output of the doppler current meter is unstable. This is one of the reasons why the flow velocity value cannot be stabilized during the measurement of the flow velocity by the external field using the doppler current meter.
Thirdly, in the process of measuring the flow velocity, the doppler current meter is also subjected to the flutter caused by the flow excitation of the wire rope, cable, etc. connected with the doppler current meter, which also causes the flow velocity output of the doppler current meter to fluctuate in small amplitude.
The unstable flow rate is caused by the design of the structure of the current meter, and the demand of the current meter is miniaturization, portability and high precision. The data processing unit and the like are packaged in the main body frame of the Doppler current meter, so that the portability is realized; the display module is connected with the display module arranged on the shore through a cable, so that the purpose of displaying the flow speed in real time is achieved. This configuration makes the acoustic wave transmitting and receiving process at the front end of the current meter influenced by the sea current, which makes it difficult to accurately calibrate the accuracy of the measured flow rate in the vertical circulating water tank.
The invention discloses an acoustic Doppler current meter (patent application number: CN 201610143381.8). the acoustic Doppler current meter provided by the invention patent is capable of being arranged in a submerged buoy system, has two working modes of direct reading and self-contained, and has the characteristics of high current measurement precision and flexible operation.
The invention discloses a method for measuring flow by using an acoustic Doppler current meter (patent application number: CN 201610168918.6). according to the method, parameter information set by the current meter is combined with four-path wave beam echo signals acquired by a transducer to synthesize three-dimensional vector velocity, then coordinate conversion is carried out, flow measurement data are filtered smoothly, and a flow measurement result is output.
To sum up, at present, a device suitable for realizing the speed measurement precision calibration of the Doppler current meter in a vertical circulating water tank does not exist.
Disclosure of Invention
The invention aims to provide a device for calibrating the speed measurement precision of a Doppler current meter.
The purpose of the invention is realized as follows: be provided with a riser on circulating water tank working section upper portion, there is a doppler current meter on the intraductal bottom of standing vertically through the support mounting, the side of the pipe hypomere of standing vertically is provided with a round hole, round hole department is connected with a pipe, and the pipe covers the front portion of doppler current meter, be provided with the film at the terminal surface of pipe, the film front end is provided with the suction tube, the tip of suction tube passes behind the working section and is connected with the entry end of peristaltic pump, the exit end of peristaltic pump is connected with out the flow tube, the tip of out the flow tube stretches into to the working section in.
The invention also includes such structural features:
1. the upright tube is of a square tube structure supported by organic glass, and the outer surface of the upright tube is provided with a grid.
2. The number of the flow suction pipes is 8, the flow suction pipes are arranged at the front end of the film at equal intervals, and the lengths of the flow suction pipes are different.
3. The number of the flow outlet pipes and the number of the pumps are respectively 8, and the pumps are controlled by a control circuit.
4. The thin film is arranged at the front end of the round pipe through the locking ring.
Compared with the prior art, the invention has the beneficial effects that:
(1) firstly, a technology of combining a suction pipe, a peristaltic pump and a discharge pipe is adopted to extract water flow in the front of a film, so that the stagnation pressure in the front of the film is obviously reduced, and the film is extremely thin and has limited surface tension, so that the water pressures on two sides of the film are equal, the Doppler current meter is in a zero-pressure environment, and a good condition is provided for accurate calibration of the flow velocity of the Doppler current meter; secondly, the film is extremely thin and is far smaller than the wave length of sound wave used by the Doppler current meter when in work, the influence on sound wave propagation in water is extremely small, and the sound wave is longitudinal wave and can well penetrate through the film, so that the sound beam distortion in the transmitting and receiving processes of the Doppler current meter is extremely small and can be ignored; thirdly, the control circuit is adopted to realize the start and stop of the peristaltic pump, so that the purpose of controlling the flow suction speed is achieved, and the peristaltic pump is equipment which can be started at any time, has fine and adjustable flow speed and stable operation, so that the requirement of pumping the flow at the front end of the film can be met, and the purpose of reducing the higher pulsating pressure at the front end of the film in a flow suction mode is achieved; finally, the grating outside the vertical pipe can rectify the flow distortion caused by the vertical pipe introduced in the working section, crush the large vortex and eliminate the flow field disturbance state generated after the vertical pipe and the circular pipe are introduced as far as possible.
(2) Firstly, the flow absorbed in the front of the film belongs to low-speed and non-uniform flow, the Doppler effect is extremely small, and the flow is positioned outside a scattering area measured by a Doppler current meter, namely the flow only brings weak changes to the propagation process of transmitting sound waves and receiving sound waves, and the influence of the brought sound beam distortion can be ignored; secondly, the invention provides a convenient method for placing the Doppler current meter in the working section of the vertical circulating water tank, namely, the fixing and flow guiding modes of the Doppler current meter are not needed to be considered in the working section, so that the operation flow is simplified; finally, the Doppler current meter is placed in the vertical pipe, so that the problems of vibration and sound production of a cable connected with the Doppler current meter under flow excitation are directly solved, and the accuracy of experimental calibration of the Doppler current meter for speed measurement is improved to a certain extent.
Drawings
FIG. 1 is a block diagram of an apparatus for calibrating velocity measurement accuracy of a Doppler current meter;
FIG. 2 is a schematic view of the placement of a suction tube;
FIG. 3 is a schematic view of the connection of the aspiration line, peristaltic pump and outflow line;
wherein, 1 is a working section, 2 is an upright tube, 3 is a round tube, 4 is a film, 5 is a locking ring, 6 is a grating, 7 is a suction tube, 8 is a peristaltic pump, 9 is a discharge tube, 10 is a control circuit, 11 is a Doppler current meter, and 12 is a bracket; the flow suction pipe 7 is composed of a flow suction pipe 71, a flow suction pipe 72, a flow suction pipe 73, a flow suction pipe 74, a flow suction pipe 75, a flow suction pipe 76, a flow suction pipe 77 and a flow suction pipe 78, the peristaltic pump 8 is composed of a peristaltic pump 81, a peristaltic pump 82, a peristaltic pump 83, a peristaltic pump 84, a peristaltic pump 85, a peristaltic pump 86, a peristaltic pump 87 and a peristaltic pump 88, and the flow outlet pipe 9 is composed of a flow outlet pipe 91, a flow outlet pipe 92, a flow outlet pipe 93, a flow outlet pipe 94, a flow outlet pipe 95, a flow outlet pipe 96, a flow outlet pipe 97 and a flow outlet pipe 98.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
With reference to fig. 1 to 2, the device for calibrating the speed measurement precision of the doppler current meter of the present invention comprises a working section 1, an upright tube 2, a circular tube 3, a thin film 4, a locking ring 5, a grating 6, a flow suction tube 7, a peristaltic pump 8, a flow outlet tube 9, a control circuit 10, a doppler current meter 11, and a support 12; the vertical pipe penetrates through the upper part of the working section of the vertical circulating water tank, the round pipe is positioned on the side part of the vertical pipe, the thin film is positioned on the front part of the round pipe, the locking ring is positioned on the outer side of the thin film, the grating is positioned outside the vertical pipe, the flow suction pipe is positioned on the front part of the thin film, one end of the peristaltic pump is connected with the flow suction pipe, the other end of the peristaltic pump is connected with the flow outlet pipe, the control circuit is connected with a power switch of the peristaltic pump, and the support is positioned inside the vertical pipe; the lengths of the suction tubes in front of the membrane are not uniform; according to the change condition of the flow rate, the on-off of the power supply of the peristaltic pump in the control circuit is adjusted, so that the film in the test process is always kept in a parallel state with the pipe orifice of the circular pipe.
The working section 1 is a rectangular through structure with a framework made of stainless steel profiles and a wall made of organic glass, and is placed in a vertical circulating water tank, the vertical circulating water tank can realize circulating water flow with the flow speed of 0.3-3m/s, and the flow speed is accurately adjustable;
the upright tube 2 is a rectangular whole body structure with a stainless steel section as a frame and organic glass as a wall surface, is not provided with a top cover, and is provided with a round opening at the side surface so as to be adhered with the round tube 3;
the round tube 3 is made of organic glass and is adhered to the side surface of the vertical tube 2 by high-strength glue;
the film 4 is made of high-density polyethylene particles, and the thickness is only 0.02 mm;
the locking ring 5 is made of thin steel wires, and a locking device is arranged at the bottom end;
the grid 6 is made of organic glass sheets and is adhered to the side surface of the vertical pipe 2 by adopting high-strength solid glue so as to guide the flow;
the suction pipe 7 consists of a suction pipe 71, a suction pipe 72, a suction pipe 73, a suction pipe 74, a suction pipe 75, a suction pipe 76, a suction pipe 77 and a suction pipe 78, which are all polyethylene plastic pipes and are placed at the front end of the film 4 for reducing the higher pulsating pressure at the front end of the film 4 and eliminating the trickle phenomenon caused by the blocking of the flow of the film 4;
the peristaltic pump 8 consists of a peristaltic pump 81, a peristaltic pump 82, a peristaltic pump 83, a peristaltic pump 84, a peristaltic pump 85, a peristaltic pump 86, a peristaltic pump 87 and a peristaltic pump 88; the peristaltic pumps 81, 82, 83, 84, 85, 86, 87 and 88 are all micro peristaltic pumps of the type: KLP 40-00Y; wherein, the inlet of one end of the peristaltic pump 81 is connected with the suction pipe 71, the outlet of the other end of the peristaltic pump 81 is connected with the outlet pipe 91, the inlet of one end of the peristaltic pump 82 is connected with the suction pipe 72, the outlet of the other end of the peristaltic pump 82 is connected with the outlet pipe 92, the inlet of one end of the peristaltic pump 83 is connected with the suction pipe 73, the outlet of the other end of the peristaltic pump 83 is connected with the outlet pipe 93, the inlet of one end of the peristaltic pump 84 is connected with the suction pipe 74, the outlet of the other end of the peristaltic pump 84 is connected with the outlet pipe 94, the inlet of one end of the peristaltic pump 85 is connected with the suction pipe 75, the outlet of the other end of the peristaltic pump 85 is connected with the outlet pipe 95, the inlet of one end of the peristaltic pump 86 is connected with the suction pipe 76, the outlet of the other end of the peristaltic pump 86 is connected with the outlet pipe 96, the inlet of one end of the peristaltic pump 87 is connected with the suction pipe 77, the outlet of the other end of the peristaltic pump 87 is connected with the outlet pipe 97, the inlet of one end of the peristaltic pump 88 is connected with the suction pipe 78, and the outlet of the other end of the peristaltic pump 88 is connected with the outlet pipe 98;
the outlet pipe 9 consists of an outlet pipe 91, an outlet pipe 92, an outlet pipe 93, an outlet pipe 94, an outlet pipe 95, an outlet pipe 96, an outlet pipe 97 and an outlet pipe 98; the outflow pipe 91, the outflow pipe 92, the outflow pipe 93, the outflow pipe 94, the outflow pipe 95, the outflow pipe 96, the outflow pipe 97 and the outflow pipe 98 are all polyethylene plastic pipes and are respectively used for guiding out the fluids sucked by the peristaltic pump 81, the peristaltic pump 82, the peristaltic pump 83, the peristaltic pump 84, the peristaltic pump 85, the peristaltic pump 86, the peristaltic pump 87 and the peristaltic pump 88;
the control circuit 10 is a switch-type power supply and is used for controlling the start-stop states of a peristaltic pump 81, a peristaltic pump 82, a peristaltic pump 83, a peristaltic pump 84, a peristaltic pump 85, a peristaltic pump 86, a peristaltic pump 87 and a peristaltic pump 88;
doppler current meter 11 is portable Doppler velocity of flow water level detector, the model: DPL-LS12, placed in the upright tube 2, which is the subject of the calibrated flow rate;
the support 12 is made of organic glass and is used for fixing the Doppler current meter 11;
the use method of the invention comprises the following steps: the Doppler current meter 11 is placed on a support 12 and fixed by a nylon bandage, then a thin film 4 is placed at one end of a circular tube 3, the thin film 4 is clamped and fixed by a locking ring 5, the thin film 4 is kept in a tensioning state, the circular tube 3, the thin film 4 and the locking ring 5 are placed into a working section 1 of a vertical circulating water tank, an upright tube 2 is inserted into the working section 1, the circular tube 3 is bonded on the side surface of the upright tube 2, a grating 6 is bonded on the side surface of the upright tube 2, one end of a suction tube 71 passes through the working section 1 and is positioned at the front end of the thin film 4, one end of a suction tube 72 passes through the working section 1 and is positioned at the front end of the thin film 4, one end of a suction tube 73 passes through the working section 1 and is positioned at the front end of the thin film 4, one end of a suction tube 74 passes through the working section 1 and is positioned at the front end of the thin film 4, one end of a suction tube 75 passes through the working section 1 and is positioned at the front end of the thin film 4, one end of a suction tube 76 passes through the working section 1 and is positioned at the front end of the thin film 4, one end of a suction pipe 77 penetrates through the working section 1 and is positioned at the front end of the film 4, one end of a suction pipe 78 penetrates through the working section 1 and is positioned at the front end of the film 4, the distances between the suction pipe 71, the suction pipe 72, the suction pipe 73, the suction pipe 74, the suction pipe 75, the suction pipe 76, the suction pipe 77 and the suction pipe 78 and the center of the film 4 are unequal, the positions where the suction pipe 71, the suction pipe 72, the suction pipe 73, the suction pipe 74, the suction pipe 75, the suction pipe 76, the suction pipe 77, the suction pipe 78 and the working section 1 penetrate are watertight, the other end of the suction pipe 71 is connected with a peristaltic pump 81, the other end of the suction pipe 72 is connected with a peristaltic pump 82, the other end of the suction pipe 73 is connected with a peristaltic pump 83, the other end of the suction pipe 74 is connected with a peristaltic pump 84, the other end of the suction pipe 75 is connected with a pump 85, the other end of the peristaltic pump 76 is connected with a peristaltic pump 86, the other end of the suction pipe 77 is connected with a peristaltic pump 88, the other end of the peristaltic pump 81 is connected with a flow outlet pipe 91, the other end of the peristaltic pump 82 is connected with a flow outlet pipe 92, the other end of the peristaltic pump 83 is connected with a flow outlet pipe 93, the other end of the peristaltic pump 84 is connected with a flow outlet pipe 94, the other end of the peristaltic pump 85 is connected with a flow outlet pipe 95, the other end of the peristaltic pump 86 is connected with a flow outlet pipe 96, the other end of the peristaltic pump 87 is connected with a flow outlet pipe 97, the other end of the peristaltic pump 88 is connected with a flow outlet pipe 98, the other end of the flow outlet pipe 91 penetrates through the working section 1 for flow guiding, the other end of the flow outlet pipe 92 penetrates through the working section 1 for flow guiding, the other end of the flow outlet pipe 93 penetrates through the working section 1 for flow guiding, the other end of the flow outlet pipe 94 penetrates through the working section 1 for flow guiding, the other end of the flow outlet pipe 96 penetrates through the working section 1 for flow guiding, the other end of the flow outlet pipe 97 penetrates through the working section 1 for flow guiding, the other end of the flow outlet pipe 98 penetrates through the working section 1 for flow guiding, the passing positions of the outflow pipe 91, the outflow pipe 92, the outflow pipe 93, the outflow pipe 94, the outflow pipe 95, the outflow pipe 96, the outflow pipe 97 and the outflow pipe 98 and the working section 1 are watertight, a power supply connector of the peristaltic pump 81 is connected with the control circuit 10, a power supply connector of the peristaltic pump 82 is connected with the control circuit 10, a power supply connector of the peristaltic pump 83 is connected with the control circuit 10, a power supply connector of the peristaltic pump 84 is connected with the control circuit 10, a power supply connector of the peristaltic pump 85 is connected with the control circuit 10, a power supply connector of the peristaltic pump 86 is connected with the control circuit 10, a power supply connector of the peristaltic pump 87 is connected with the control circuit 10, and a power supply connector of the peristaltic pump 88 is connected with the control circuit 10; distilled water is injected into the vertical pipe 2, so that the water level in the vertical pipe 2 is the same as the highest water level of the vertical circulating water tank; then, the circulating water tank is started to observe the state of the film 4, and the control circuit 10 is used to adjust the working state of the peristaltic pump 8, so that the film 4 and the orifice of the circular tube 3 are kept in a flush state, and the calibration work of the doppler current meter 11 can be carried out at this time.
The film 4 had a thickness of 0.02 mm and a density of 0.91X 103Kilogram/cubic meter, longitudinal wave sound velocity of 2.16 x 103M/s, according to formula (1):
the transmission coefficient in water was found to be 1.
In conclusion, the invention relates to a device for calibrating the speed measurement precision of a Doppler current meter, which comprises an upright tube, a circular tube, a thin film, a locking ring, a grating, a flow suction tube, a peristaltic pump, a flow outlet tube, a control circuit and a support, wherein the upright tube penetrates through the upper part of the working section of a vertical circulating water tank, the circular tube is positioned on the side part of the upright tube, the thin film is positioned on the front part of the circular tube, the locking ring is positioned on the outer side of the thin film, the grating is positioned outside the upright tube, the flow suction tube is positioned on the front part of the thin film, one end of the peristaltic pump is connected with the flow suction tube, the other end of the peristaltic pump is connected with the flow outlet tube, the control circuit is connected with a power switch of the peristaltic pump, and the support is positioned inside the upright tube; this mark device of doppler current meter precision that tests speed utilizes the film to keep apart rivers to the impact of doppler current meter, utilizes the initiative technique of inhaling to flow to reduce the anterior higher pulsating pressure of film, solves because of doppler current meter receives fluid pulsating pressure and fluid and breaks away from the flutter effect problem that leads to in the test procedure, improves the speed and the calibration precision of doppler current meter.
Claims (7)
1. The utility model provides a mark device of Doppler current meter accuracy of testing speed which characterized in that: be provided with a riser on circulating water tank working section upper portion, there is a Doppler current meter on the intraductal bottom of standing vertically through the support mounting, the side of the pipe hypomere of standing vertically is provided with a round hole, round hole department is connected with a pipe, and the pipe covers the front portion of Doppler current meter, be provided with the film at the terminal surface of pipe, the film front end is provided with the suction tube, the tip of suction tube passes behind the working section and is connected with the entry end of peristaltic pump, the exit end of peristaltic pump is connected with out the flow tube, the tip of out the flow tube stretches into to the working section in, the equidistant setting of suction tube is at the film front end, and be unequally spaced apart distance with the distance at film center, film in the testing process keeps the parallel and level state with the mouth of pipe all the time.
2. The device for calibrating the speed measurement precision of the Doppler current meter according to claim 1, wherein: the upright tube is of a square tube structure supported by organic glass, and the outer surface of the upright tube is provided with a grid.
3. The device for calibrating the speed measurement precision of the Doppler current meter according to claim 1 or 2, is characterized in that: the number of the flow suction pipes is 8, the flow suction pipes are arranged at the front end of the film at equal intervals, and the lengths of the flow suction pipes are different.
4. The device for calibrating the speed measurement precision of the Doppler current meter according to claim 3, wherein: the number of the flow outlet pipes and the number of the pumps are respectively 8, and the pumps are controlled by a control circuit.
5. The device for calibrating the speed measurement precision of the Doppler current meter according to claim 1 or 2, is characterized in that: the thin film is arranged at the front end of the round pipe through the locking ring.
6. The device for calibrating the speed measurement precision of the Doppler current meter according to claim 3, wherein: the thin film is arranged at the front end of the round pipe through the locking ring.
7. The device for calibrating the speed measurement precision of the Doppler current meter according to claim 4, wherein: the thin film is arranged at the front end of the round pipe through the locking ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911255344.6A CN111220818B (en) | 2019-12-10 | 2019-12-10 | Device for calibrating speed measurement precision of Doppler current meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911255344.6A CN111220818B (en) | 2019-12-10 | 2019-12-10 | Device for calibrating speed measurement precision of Doppler current meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111220818A CN111220818A (en) | 2020-06-02 |
| CN111220818B true CN111220818B (en) | 2021-10-19 |
Family
ID=70826783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911255344.6A Active CN111220818B (en) | 2019-12-10 | 2019-12-10 | Device for calibrating speed measurement precision of Doppler current meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111220818B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111812352B (en) * | 2020-07-08 | 2021-06-08 | 四川大学 | Flow velocity detector for water conservancy measurement |
| CN116500609B (en) * | 2023-05-16 | 2023-11-21 | 北京锐达仪表有限公司 | Composite microwave radar measurement system for detecting blanking state and material level fluctuation state |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1087213A2 (en) * | 1999-09-24 | 2001-03-28 | Hitachi, Ltd. | Hot-wire type air flow meter for internal combustion engine |
| JP2001116600A (en) * | 1999-10-18 | 2001-04-27 | Aichi Tokei Denki Co Ltd | Face-velocity-type doppler flowmeter |
| WO2013093328A1 (en) * | 2011-12-22 | 2013-06-27 | Institut National De Recherche En Sciences Et Technologies Pour L'environnement Et L'agriculture (Irstea) | Method and calibration installation of a sensor for measuring data representative of the flow speed of a fluid stream |
| CN203396784U (en) * | 2013-09-10 | 2014-01-15 | 河海大学 | Seepage flow velocity monitoring test device for porous-medium structural body |
| CN105954538A (en) * | 2016-07-07 | 2016-09-21 | 水利部交通运输部国家能源局南京水利科学研究院 | Doppler ultrasonic velocity measurement device and use method thereof |
| WO2016207717A1 (en) * | 2015-06-24 | 2016-12-29 | Janssen Pharmaceutica Nv | Anti-vista antibodies and fragments |
| CN108303570A (en) * | 2018-01-09 | 2018-07-20 | 哈尔滨工程大学 | The caliberating device and method in a kind of doppler current meter sound scattering region |
| CN108801584A (en) * | 2017-10-17 | 2018-11-13 | 沈熊 | Wave current flow velocity measuring system, water hole formula swimming machine system based on Laser Doppler speed and velocity correction method |
| CN108953825A (en) * | 2018-08-02 | 2018-12-07 | 哈尔滨工程大学 | A kind of low-resistance force adaptive suction flow control device and method with noise elimination function |
| CN109141554A (en) * | 2018-05-25 | 2019-01-04 | 南京维朴水务工程有限公司 | A kind of area velocity flowmeter for surveying partly-filled pipe-flow using supersonic Doppler method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7996173B2 (en) * | 2006-07-31 | 2011-08-09 | Visualant, Inc. | Method, apparatus, and article to facilitate distributed evaluation of objects using electromagnetic energy |
| CN101382563B (en) * | 2007-09-07 | 2010-07-14 | 昆山双桥传感器测控技术有限公司 | Flow speed measurement sensor |
| CN101980027B (en) * | 2010-11-04 | 2012-04-25 | 西安近代化学研究所 | Gas gun excitation and collision device of laser Doppler velocity measurement impact calibration system |
-
2019
- 2019-12-10 CN CN201911255344.6A patent/CN111220818B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1087213A2 (en) * | 1999-09-24 | 2001-03-28 | Hitachi, Ltd. | Hot-wire type air flow meter for internal combustion engine |
| US6752014B1 (en) * | 1999-09-24 | 2004-06-22 | Hitachi, Ltd. | Hot-wire type air flow meter for internal combustion engine |
| JP2001116600A (en) * | 1999-10-18 | 2001-04-27 | Aichi Tokei Denki Co Ltd | Face-velocity-type doppler flowmeter |
| WO2013093328A1 (en) * | 2011-12-22 | 2013-06-27 | Institut National De Recherche En Sciences Et Technologies Pour L'environnement Et L'agriculture (Irstea) | Method and calibration installation of a sensor for measuring data representative of the flow speed of a fluid stream |
| CN203396784U (en) * | 2013-09-10 | 2014-01-15 | 河海大学 | Seepage flow velocity monitoring test device for porous-medium structural body |
| WO2016207717A1 (en) * | 2015-06-24 | 2016-12-29 | Janssen Pharmaceutica Nv | Anti-vista antibodies and fragments |
| CN105954538A (en) * | 2016-07-07 | 2016-09-21 | 水利部交通运输部国家能源局南京水利科学研究院 | Doppler ultrasonic velocity measurement device and use method thereof |
| CN108801584A (en) * | 2017-10-17 | 2018-11-13 | 沈熊 | Wave current flow velocity measuring system, water hole formula swimming machine system based on Laser Doppler speed and velocity correction method |
| CN108303570A (en) * | 2018-01-09 | 2018-07-20 | 哈尔滨工程大学 | The caliberating device and method in a kind of doppler current meter sound scattering region |
| CN109141554A (en) * | 2018-05-25 | 2019-01-04 | 南京维朴水务工程有限公司 | A kind of area velocity flowmeter for surveying partly-filled pipe-flow using supersonic Doppler method |
| CN108953825A (en) * | 2018-08-02 | 2018-12-07 | 哈尔滨工程大学 | A kind of low-resistance force adaptive suction flow control device and method with noise elimination function |
Non-Patent Citations (5)
| Title |
|---|
| "Design of Acoustic Doppler Current Profiler Calibration System";Hui Xie 等;《ICTETS 2019》;20191201;7033015页 * |
| "The system design for calibrating acoustic Doppler current meter in the laboratory";Jiang H 等;《MATEC Web of Conferences》;20191201;第283卷(第2期);全文 * |
| "Thermal anemometry, current state, and future directions";L. M. Fingerson 等;《AIP》;19941231;08001页 * |
| "声学多普勒海流计实验室校准系统的设计研究";李亚林;《2018年全国声学大会论文集》;20181231;全文 * |
| ADCP测量悬沙浓度的可行性分析与现场标定;程鹏等;《海洋与湖沼》;20010330(第02期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111220818A (en) | 2020-06-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4800543B2 (en) | Method and apparatus for simultaneously measuring the flow rate and concentration of a multiphase liquid / gas mixture | |
| CN111220818B (en) | Device for calibrating speed measurement precision of Doppler current meter | |
| KR100550737B1 (en) | Doppler ultrasonic flowmeter | |
| CN108303570B (en) | Calibration device and method for sound wave scattering area of Doppler current meter | |
| CN108594238A (en) | Underwater acoustic transducer electroacoustic performance calibrating installation based on transient signal and calibration method | |
| CN109141617A (en) | A kind of device and method for measuring model stream in the active section of water hole and swashing noise | |
| CN101793908A (en) | Ultrasonic flue gas flow rate meter | |
| EP1637846B1 (en) | Bubble generator for use in doppler ultrasonic flowmeter and doppler ultrasonic flowmeter | |
| CN111650403B (en) | Doppler current profiler calibration device and calibration method thereof | |
| CN102680585A (en) | Ultrasonic detector based design method for water-logging probe water-spray coupling device | |
| CN111169607B (en) | Circulating reverberation water pool for measuring radiation noise of underwater vehicle | |
| KR100784415B1 (en) | flow meter using ultrasonic-sensor | |
| Chahine et al. | Development of a near real-time instrument for nuclei measurement: the abs acoustic bubble spectrometer® | |
| Chahine et al. | Validation of bubble distribution measurements of the ABS acoustic bubble spectrometer with high speed video photography | |
| Tortoli et al. | Experimental proof of Doppler bandwidth invariance | |
| CN211317447U (en) | Small-size open channel arbitrary water level velocity of flow detection device | |
| JP3445142B2 (en) | Flow detection method for hydraulic machinery | |
| CN109441823B (en) | Device and method for detecting tiny leakage of scroll type air conditioner compressor | |
| CN109324114A (en) | The evaluation method of water pump and pipeline acoustic characteristic in a kind of reverberation tank | |
| CN202854166U (en) | Portable acoustic doppler flow velocity instrument | |
| CN213812441U (en) | Multi-channel plug-in ultrasonic open channel flowmeter | |
| CN111044117A (en) | Small-size open channel arbitrary water level velocity of flow detection device | |
| JP2632041B2 (en) | Current meter | |
| CN216410394U (en) | Portable ultrasonic sound pressure measuring device based on sound-induced capillary effect principle | |
| RU53001U1 (en) | ELECTRONIC-ACOUSTIC LIQUID MEASUREMENT DEVICE |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |