CN2826387Y - On-line calibration connecting device of dynamic pressure sensor - Google Patents
On-line calibration connecting device of dynamic pressure sensor Download PDFInfo
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- CN2826387Y CN2826387Y CN 200520041732 CN200520041732U CN2826387Y CN 2826387 Y CN2826387 Y CN 2826387Y CN 200520041732 CN200520041732 CN 200520041732 CN 200520041732 U CN200520041732 U CN 200520041732U CN 2826387 Y CN2826387 Y CN 2826387Y
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- pipe
- hole
- cavity volume
- way pipe
- dynamic pressure
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Abstract
The utility model relates to the dynamic pressure sensor measurement technique. An on-line calibration connecting device of a dynamic pressure sensor is characterized in that the utility model comprises a connecting pipeline and a measuring cavity, wherein the connecting pipeline is composed of a three-way pipe, flexible pipes and a rigidity connecting pipe, and interfaces of the three-way pipe are respectively connected with an on-site signal source and two flexible pipes which are connected with the rigidity connecting pipe and the measuring cavity in sequence. The measuring cavity is formed by the combination of two cylinder barrels. The middle part of a top cover of the first cylinder barrel is provided with a connecting hole, and the middle part of the inner surface of the top cover is provided with a circular groove. The second cylinder barrel is in a shoulder shape whose middle part is provided with a through hole which is composed of two hole passages with different hole diameters. The two cylinder barrels are matched, and a standard sensor and a standardization sensor are respectively arranged in the through hole of the measuring cavity. The utility model overcomes the defects of the prior art and has the characteristics of small volume, wide range of application, low environmental requirement, etc., and the utility model can be used in real time online.
Description
(1) technical field
The utility model relates to the dynamic pressure transducer measuring technique, relates in particular to dynamic pressure transducer on-line proving device.
(2) background technology
In scientific research and commercial production, often need to measure pulsation of chamber wall surface pressure and noise source correspondingly.In the process of measuring, pressure transducer or microphone itself are answered the requirement of coincidence measurement instrument.Though pressure transducer or microphone all passed through demarcation before dispatching from the factory, conventional staking-out work is loaded down with trivial details, the cost height, and use a period of time needs to demarcate again later.Existing staking-out work all is based on standard transducer and waits to mark sensor exchange technology.Demarcate and generally in anechoic room, carry out, drive, compare and to ignore from the direct emitted energy of acoustic reflection energy and sound source of all directions by a plane wave or spherical wave sound source enough far away.Anechoic room can make one and have the form that certain length-diameter ratio (deciding according to frequency range) and inwall have the sealing box of acoustic absorbant by speaker drive.Document " development of polyvinyladine floride membrane pressure sensor array " (experimental fluid mechanics, the 26th volume, 27-35 page or leaf) has been described the scaling method that uses white noise generator, woofer, the oval column casing that has sound-proof material, signal conditioner to carry out.Timing signal places a end by the cylindrical drum of speaker drive simultaneously with standard transducer and sensor to be calibrated, thinks that both experience identical plane wave signal, according to the transport function of linear invariant system, can obtain the Frequency Response of sensor to be calibrated.This method can obtain the information of sensitivity and phase place simultaneously, but requires that a special white noise generator is arranged, and launches by loudspeaker because of white noise, and the signal frequency that sensor is experienced will be subjected to the restriction of loudspeaker audible frequency.Therefore, actual calibration result is believable in the common frequency range of standard transducer and loudspeaker only.Especially in low-frequency range (below the 20Hz), the result of demarcation is unreliable.Even adopt expensive woofer can remedy this defective a little, but at this time loudspeaker can not produce the interior signal of high-frequency range.Therefore no matter adopt which kind of loudspeaker, all be difficult to obtain simultaneously the transport function between wider frequency range internal standard sensor and the sensor to be calibrated, and the sound-source signal that needs a standard, this makes at the scene the demarcation to dynamic pressure transducer become very inconvenient.
(3) summary of the invention
The purpose of this utility model is to provide a kind of dynamic pressure transducer on-line proving coupling arrangement, and this on-line proving coupling arrangement has overcome the deficiencies in the prior art, and it is little, applied widely to have a volume, and to characteristics such as environmental requirement are low, but online in real time is used.
The utility model is achieved in that a kind of dynamic pressure transducer on-line proving coupling arrangement, it is characterized in that comprising connecting line and measure cavity volume, connecting line is by three-way pipe, flexible pipe, the pipe that is rigidly connected is formed, three-way pipe one interface connects signal source, three-way pipe two interfaces in addition connects two flexible pipes respectively, flexible pipe connects the pipe that is rigidly connected, two pipes that are rigidly connected connect first respectively and measure the cavity volume and the second measurement cavity volume, measuring cavity volume is combined by two cylindrical tubes, first cylindrical tube top cover middle part has connecting hole, connecting hole links to each other with the pipe that is rigidly connected, top cover inside surface middle part has circular groove, second cylindrical tube is convex shoulder shape, convex shoulder shape middle part has through hole, and through hole is made up of two different ducts of internal diameter, and following duct internal diameter is greater than last duct internal diameter, the convex shoulder of second cylindrical tube matches with the inside surface of first cylindrical tube and bottom, and standard transducer and sensor to be calibrated split first and measure in the through hole of the cavity volume and the second measurement cavity volume.
Above-mentioned dynamic pressure transducer on-line proving coupling arrangement, two interfaces of described three-way pipe are symmetrical for connecting the signal source interface, the pipeline that two interfaces of three-way pipe connect the flexible pipe and the pipe that is rigidly connected is symmetrical.
Above-mentioned dynamic pressure transducer on-line proving coupling arrangement, the signal source that described three-way pipe interface connects is on-the-spot pressure signal source.
Coupling arrangement of the present utility model is made up of connecting line and measurement cavity volume, being demarcated dynamic pressure transducer and standard transducer places in the measurement cavity volume, connecting line connects on-the-spot pressure signal source, standard transducer adopts high-grade sensor, and need not other standard source, as: loudspeaker, white noise generator and piston-type pressure signal source etc., and because demarcate on-the-spot online carrying out, the pressure signal of calibration process is from the research object self of reality, so the signal frequency that sensor is experienced has comprised nearly all interested frequency range in the research process, calibration result only is subjected to the restriction of the Frequency Response of standard transducer, thereby has guaranteed the accuracy and the reliability of demarcating.The utility model cooperates with computing machine, can obtain the transport function of standard pressure transducer and sensor to be calibrated, thereby obtains the sensitivity and the phase information of sensor to be calibrated.The utility model has overcome the deficiencies in the prior art, and it is little, applied widely to have a volume, and to characteristics such as environmental requirement are low, but online in real time is used.
(4) description of drawings
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is the utility model dynamic pressure transducer on-line proving coupling arrangement structural representation;
Fig. 2 is the connecting line synoptic diagram;
Fig. 3 is for measuring the cavity volume synoptic diagram.
Among the figure: 1 three-way pipe, 2 band tubings, 3 short tubes that are rigidly connected, 4 second cylindrical tubes, 5 first cylindrical tubes, 6 measure cavity volumes, 7 standard transducers, 8 sensors to be calibrated.
(5) embodiment
Referring to Fig. 1, Fig. 2, Fig. 3, a kind of dynamic pressure transducer on-line proving coupling arrangement comprises connecting line and measures cavity volume 6.Connecting line is made up of three-way pipe 1, band tubing 2, the pipe 3 that is rigidly connected, and three-way pipe 1 one interfaces connect signal source as input end, and signal source is on-the-spot pressure signal source; Three-way pipe 1 two interfaces in addition connects two band tubings 2 respectively, and band tubing 2 connects the short tube 3 that is rigidly connected; Two interfaces of three-way pipe 1 are symmetrical for connecting the signal source interface, two interfaces of three-way pipe 1 connect flexible pipe 2 and the pipeline of the pipe 3 that is rigidly connected is symmetrical, and therefore the pressure of importing from three-way pipe 1 interface enters into through two tunnel identical and symmetrical pipelines and measures in the cavity 6.Two short tubes 3 that are rigidly connected connect first respectively and measure the cavity volume 6 and the second measurement cavity volume 6, each is measured cavity volume 6 and is combined by two cylindrical tubes 4,5, first cylindrical tube 5 top covers middle part has connecting hole, connecting hole links to each other with the short tube 3 that is rigidly connected, and top cover inside surface middle part has circular groove; Second cylindrical tube 4 is convex shoulder shape, and convex shoulder shape 4 middle parts have through hole, and through hole is made up of two different ducts of internal diameter, and following duct internal diameter is greater than last duct internal diameter, and the convex shoulder of second cylindrical tube 4 matches with the inside surface and the bottom of first cylindrical tube 5.
Referring to Fig. 1, standard transducer 7 and sensor to be calibrated 8 split first and measure in second cylindrical tube 4 through hole of the cavity volume 6 and the second measurement cavity volume 6, between the connecting hole at sensor diaphragm and first cylindrical tube 5 top covers middle part measurement space is arranged, promptly measure cavity volume 6 (circular groove).Sensor diaphragm is experienced fluctuation pressure, and the pressure signal of sensor is input to computing machine and carries out aftertreatment after signal conditioner, A/D conversion.
Connecting line and measurement cavity volume 6 will have the better seal performance.Three-way pipe 1 be connected short tube 3 inwalls should be smooth, according to the dynamic perfromance of dynamic pressure transducer pipeline transmission dynamic response, middle band tubing 2 requires short as far as possible, so that obtain higher free-running frequency.And, when band tubing 2 more in short-term, the easier adjustment symmetry status of two-way connecting line.Measurement cavity volume 6 between connecting line and the sensor diaphragm should be as far as possible little, thereby obtain higher free-running frequency.The sectional area of measuring cavity volume 6 should be bigger slightly than the diaphragm of standard pressure transducer 7 and sensor to be calibrated 8, and it is highly then as far as possible little.
Claims (3)
1. dynamic pressure transducer on-line proving coupling arrangement, it is characterized in that comprising connecting line and measure cavity volume, connecting line is by three-way pipe, flexible pipe, the pipe that is rigidly connected is formed, three-way pipe one interface connects signal source, three-way pipe two interfaces in addition connects two flexible pipes respectively, flexible pipe connects the pipe that is rigidly connected, two pipes that are rigidly connected connect first respectively and measure the cavity volume and the second measurement cavity volume, measuring cavity volume is combined by two cylindrical tubes, first cylindrical tube top cover middle part has connecting hole, connecting hole links to each other with the pipe that is rigidly connected, top cover inside surface middle part has circular groove, second cylindrical tube is convex shoulder shape, convex shoulder shape middle part has through hole, and through hole is made up of two different ducts of internal diameter, and following duct internal diameter is greater than last duct internal diameter, the convex shoulder of second cylindrical tube matches with the inside surface of first cylindrical tube and bottom, and standard transducer and sensor to be calibrated split first and measure in the through hole of the cavity volume and the second measurement cavity volume.
2. dynamic pressure transducer on-line proving coupling arrangement according to claim 1 is characterized in that two interfaces of three-way pipe are symmetrical for connecting the signal source interface, and the pipeline that two interfaces of three-way pipe connect the flexible pipe and the pipe that is rigidly connected is symmetrical.
3. dynamic pressure transducer on-line proving coupling arrangement according to claim 1 is characterized in that the signal source that the three-way pipe interface connects is on-the-spot pressure signal source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520041732 CN2826387Y (en) | 2005-05-20 | 2005-05-20 | On-line calibration connecting device of dynamic pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520041732 CN2826387Y (en) | 2005-05-20 | 2005-05-20 | On-line calibration connecting device of dynamic pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2826387Y true CN2826387Y (en) | 2006-10-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520041732 Expired - Lifetime CN2826387Y (en) | 2005-05-20 | 2005-05-20 | On-line calibration connecting device of dynamic pressure sensor |
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| Country | Link |
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| CN (1) | CN2826387Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106324178A (en) * | 2015-07-03 | 2017-01-11 | 上海戴维蓝普传感技术有限公司 | Working method of calibration-free catalytic combustion sensor |
| CN110307929A (en) * | 2019-07-08 | 2019-10-08 | 上海交通大学 | A kind of Fluid pressure measuring system and method based on pressure-sensitive films |
| CN110617915A (en) * | 2019-09-29 | 2019-12-27 | 重庆大学 | Calibration system and method for coal and gas outburst dynamic pressure sensor |
-
2005
- 2005-05-20 CN CN 200520041732 patent/CN2826387Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106324178A (en) * | 2015-07-03 | 2017-01-11 | 上海戴维蓝普传感技术有限公司 | Working method of calibration-free catalytic combustion sensor |
| CN110307929A (en) * | 2019-07-08 | 2019-10-08 | 上海交通大学 | A kind of Fluid pressure measuring system and method based on pressure-sensitive films |
| CN110307929B (en) * | 2019-07-08 | 2020-08-25 | 上海交通大学 | Fluid pressure measuring system and method based on pressure sensitive film |
| CN110617915A (en) * | 2019-09-29 | 2019-12-27 | 重庆大学 | Calibration system and method for coal and gas outburst dynamic pressure sensor |
| CN110617915B (en) * | 2019-09-29 | 2021-11-02 | 重庆大学 | Calibration system and method for coal and gas outburst dynamic pressure sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI ELECTRIC POWER STATION EQUIPMENT CO.; PA Free format text: FORMER OWNER: SHANGHAI TURBINE CO., LTD.; PATENTEE Effective date: 20080509 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080509 Address after: No. 188, Chun Chun Road, Shanghai, Minhang: 201100 Co-patentee after: Shanghai Jiao Tong University Patentee after: Shanghai electric power plant equipment Co., Ltd. Address before: No. 333, Jiangchuan Road, Shanghai, Minhang District: 200240 Co-patentee before: Shanghai Jiao Tong University Patentee before: Shanghai steam turbine Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150520 Granted publication date: 20061011 |