CN204964098U - Backpressure formula pressure sensor - Google Patents

Backpressure formula pressure sensor Download PDF

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Publication number
CN204964098U
CN204964098U CN201520310689.8U CN201520310689U CN204964098U CN 204964098 U CN204964098 U CN 204964098U CN 201520310689 U CN201520310689 U CN 201520310689U CN 204964098 U CN204964098 U CN 204964098U
Authority
CN
China
Prior art keywords
back pressure
pressure
pressure chamber
sensor
sensing element
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.)
Expired - Fee Related
Application number
CN201520310689.8U
Other languages
Chinese (zh)
Inventor
王罗
于常安
何显中
贾琦
张旭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Institute Of Equipment Design & Test Technology Cardc
Original Assignee
Institute Of Equipment Design & Test Technology Cardc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Institute Of Equipment Design & Test Technology Cardc filed Critical Institute Of Equipment Design & Test Technology Cardc
Priority to CN201520310689.8U priority Critical patent/CN204964098U/en
Application granted granted Critical
Publication of CN204964098U publication Critical patent/CN204964098U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a backpressure formula pressure sensor, its characterized in that: including casing, sensing element, the casing front end is inlayed there is sensing element, shell backend has the air vent, and the casing forms back pressure chamber with sensing element, and this back pressure chamber passes through the air vent and links to each other with external atmosphere, shutoff air vent before the measurement seals back pressure chamber, and gas pressure is the same with local atmospheric pressure at that time in the back pressure chamber, realizes near the ressure measurement in atmospheric pressure from this, and in like manner, back pressure chamber can encapsulate the reference that needs and press to realize the ressure measurement under the different pressure environment, the sensor dependable performance, the precision is high, and is small.

Description

A kind of backpressure sensor
Technical field
The utility model relates to the dynamic pressure measurement sensor under a kind of near-atmospheric pressure environment, specifically a kind of backpressure sensor.
Background technology
In aerodynamic experiment, often need the pressure on measurement model surface to change, typically use pressure scanning valve and complete measurement, but when model needs to rotate, the flexible pipe that pressure tap is connected with scanning valve just cannot complete installation.Although some high-precision absolute pressure sensor can be used for measuring, but atmospheric pressure just has about 100KPa, such as range is 100KPa, even if precision reaches the sensor of 0.1%F.S, when measuring 3KPa pressure, measuring accuracy only can reach 50 ~ 100Pa, and this obviously can not meet the precision needs of field testing; If measured with the gauge pressure transducer of lower range, although can precision be ensured, but need to form pressure reduction before and after sensor, and when model rotates, whole sensor all needs to rotate together, the data that gauge pressure transducer is measured not are the pressure reduction between blade surface and local atmospheric pressure.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned technical matters, provides a kind of backpressure sensor, can realize the dynamic pressure measurement under near-atmospheric pressure environment.
Realizing the technical solution of the utility model is: a kind of backpressure sensor, comprises housing, sensitive element; Described housing forward end is inlaid with sensitive element; Described housing rear end has air hole; Described housing and sensitive element form back pressure cavity, and this back pressure cavity is connected with the external world by air hole.
Described air hole is provided with port sealing element.
Be connected with ambient atmosphere by air hole, before measuring shutoff air hole, back pressure cavity sealed, in back pressure cavity, gaseous tension is identical with there and then atmospheric pressure, and such dynamic test is the inside and outside differential pressure of pressure transducer is exactly required dynamic pressure.
The invention has the beneficial effects as follows, realize the pressure survey near atmospheric pressure, sensor performance is reliable, and precision is high, and volume is little.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the utility model pressure transducer schematic diagram.
Number in the figure: 1-housing, 2-pressure-sensing device, 3-air hole, 4-back pressure cavity.
Embodiment
As shown in Figure 1, a kind of backpressure sensor, comprises housing 1, sensitive element 2, described housing 1 front end is inlaid with sensitive element 2, there is air hole 3 described housing 1 rear end, and housing 1 and sensitive element 2 form back pressure cavity 4, and this back pressure cavity 4 is connected with the external world by air hole 3.Described air hole 3 is provided with port sealing element.
Utility model works process: before pressure test, by air hole 3 port sealing component seal, the atmospheric pressure of an encapsulation there and then in back pressure cavity 4, at this moment, the pressure data that pressure transducer spreads out of is that experiment needs data, realizes the measurement to dynamic pressure.

Claims (1)

1. a backpressure sensor, is characterized in that: comprise housing, sensitive element; Described housing forward end is inlaid with sensitive element; Described housing rear end has air hole; Described housing and sensitive element form back pressure cavity, and this back pressure cavity is connected with the external world by air hole; Described air hole is provided with port sealing element.
CN201520310689.8U 2015-05-14 2015-05-14 Backpressure formula pressure sensor Expired - Fee Related CN204964098U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520310689.8U CN204964098U (en) 2015-05-14 2015-05-14 Backpressure formula pressure sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520310689.8U CN204964098U (en) 2015-05-14 2015-05-14 Backpressure formula pressure sensor

Publications (1)

Publication Number Publication Date
CN204964098U true CN204964098U (en) 2016-01-13

Family

ID=55059154

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520310689.8U Expired - Fee Related CN204964098U (en) 2015-05-14 2015-05-14 Backpressure formula pressure sensor

Country Status (1)

Country Link
CN (1) CN204964098U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107144395A (en) * 2017-07-06 2017-09-08 贵州航天电器股份有限公司 A kind of air pressure measuring apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107144395A (en) * 2017-07-06 2017-09-08 贵州航天电器股份有限公司 A kind of air pressure measuring apparatus

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20160113

Termination date: 20160514

CF01 Termination of patent right due to non-payment of annual fee