CN201096561Y - Strain type square tube pressure sensor - Google Patents
Strain type square tube pressure sensor Download PDFInfo
- Publication number
- CN201096561Y CN201096561Y CNU2007200321830U CN200720032183U CN201096561Y CN 201096561 Y CN201096561 Y CN 201096561Y CN U2007200321830 U CNU2007200321830 U CN U2007200321830U CN 200720032183 U CN200720032183 U CN 200720032183U CN 201096561 Y CN201096561 Y CN 201096561Y
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- CN
- China
- Prior art keywords
- strain
- tube
- pressure sensor
- square tube
- gages
- 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
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Abstract
The utility model relates to a strain-type square tube pressure sensor which comprises a strain tube and four strain gages arranged on the external surface of the strain tube; the strain tube is a square tube; four strain gages are transversely and axially arranged on the external wall planes around the strain tube. The strain-type square tube pressure sensor has the advantages that firstly, in the strain-type square tube pressure sensor, the strain gages are adhered on the planes so that the stress-strain appearance is good and the reliability of the zero point and the sensibility is good; because the strain gages are adhered on the planes; the position is easy to be mastered and the positions of the strain gages are not changed after the compression, compared with the positions of the strain gages before the compression is applied so that the accuracy of the positions of the strain gages is guaranteed and the measuring accuracy is improved; secondly, besides the operational area of the strain gages on the strain tube, the rest part has great rigidity and the work frequency of the rest part is increased by 3 to 5 times, compared with the structure with the same range and equal rigidity distribution so that the pressure sensor is applicable to the accurate measuring of the dynamic or instant pressure; thirdly, the strain-type square tube pressure sensor has good linearity and the strain gages work in the unidirectional strain-stress direction so that the linearity can reach 0.05 grade.
Description
Technical field
The utility model relates to a kind of sensor of gaging pressure, and particularly a kind of high precision strain-type square tube pressure transducer is widely used in the pressure survey in fields such as metering, industry, the energy, oil, chemical industry.
Background technology
General garden pressing diaphragm force transducer and the two kinds of versions of thin cylinder formula pressure transducer that adopt of existing strain pressure transducer.What the circular iris pressure transducer adopted is the version of circular sheet periphery fixed, and therefore the strain more complicated experienced thereon of general strain ga(u)ge is difficult for accurately calculating, thereby has reduced sensitivity, and precision is also low.And be difficult to machining for a small amount of Cheng Yuan pressing diaphragm force transducer, profile is bigger.Thin cylinder formula pressure transducer action principle is the inboard that gas or fluid pressure is acted on thin cylinder, and strainometer sticks on the outside of thin cylinder, because outer wall is a circular arc, increases so paste the difficulty of strainometer.The position of paster is difficult to grasp, and the bad meeting of afterburning state causes too much unrelieved stress when paster, so cause ess-strain out of order, the zero point of sensor and Sensitivity Stability are poor like this.
The utility model content
The purpose of this utility model overcome the defective of garden pressing diaphragm force transducer and thin cylinder formula pressure transducer in the past, a kind of strain-type square tube pressure transducer is provided.
Technical solution of the present utility model is: a kind of strain-type square tube pressure transducer, comprise strain tube and 4 strainometers that are arranged on this strain tube outside surface, described strain tube is a square tube, and the outer wall plane is provided with laterally and axial 4 strainometers around the strain tube.
The utlity model has following advantage:
One, the utility model strainometer is attached on the plane, and stress-strain state is good, has certain advantage aspect following two: (1) can not draw as too much unrelieved stress the good stability of zero point and sensitivity owing to bad afterburning state in the paster process; (2) at plane patch, the position is easy to grasp, and the basic no change in position of strainometer before and after the pressurization guarantees the accuracy of strainometer position, raising measuring accuracy so better.
Two, the utility model strain tube is except that the strainometer workspace, and remainder all has very big rigidity, and compares with the structure of stiffness distribution such as range, has 3～5 times frequency of operation, more is applicable to dynamically or the accurate measurement of instantaneous pressure;
Three, in the work of uniaxial stress direction, linearity can reach 0.05 grade basically for the utility model good linearity, strainometer.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the stretch-out view of Fig. 1.
Fig. 3 is the vertical view of Fig. 1.
Embodiment
A kind of strain-type square tube pressure transducer, comprise strain tube 1 and 4 strainometers 2 that are arranged on this strain tube outside surface, the top seal of strain tube, its top thickness is thicker, strain tube 1 is a square tube, the outer wall plane is provided with laterally and axial 4 strainometers 2 around the strain tube 1, and above-mentioned 4 strainometers connect and compose full-bridge circuit, and strain tube 1 bottom can be connected with pressure test device.During gaging pressure, strainometer 2 is experienced the distortion of strain tube, exports the voltage signal that is directly proportional with pressure after 4 foil gauges are formed the measurement full-bridge, can accurately measure pressure.
Be the utility model The performance test results below:
25Mpa strain-type square tube pressure transducer performance test report
Measurement range
0～25MpaIndicating instrument
34401A
Driving voltage
DC6VExcitation power supply
GW-B
Test result: non-linear (%FS) 0.026
(%FS) 0.030 lags behind
Repeatability (%FS) 0.020
Zero-bit output (μ V) 175
The precision of sensor is: 0.03 grade
From above-mentioned test result as can be seen, highly sensitive, the good stability of the utility model, precision height.
Claims (1)
1. strain-type square tube pressure transducer, comprise strain tube (1) and be arranged on 4 strainometers (2) of this strain tube outside surface, it is characterized in that: described strain tube (1) is square tube, and strain tube (1) outer wall plane all around is provided with laterally and axial 4 strainometers (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200321830U CN201096561Y (en) | 2007-07-03 | 2007-07-03 | Strain type square tube pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200321830U CN201096561Y (en) | 2007-07-03 | 2007-07-03 | Strain type square tube pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201096561Y true CN201096561Y (en) | 2008-08-06 |
Family
ID=39923614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200321830U Expired - Fee Related CN201096561Y (en) | 2007-07-03 | 2007-07-03 | Strain type square tube pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201096561Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105509951A (en) * | 2016-01-13 | 2016-04-20 | 中南大学 | Compression type remolded soil pore pressure testing device |
| CN106197816A (en) * | 2016-08-05 | 2016-12-07 | 机科发展科技股份有限公司 | A kind of A seating sensor measuring boom support member stress |
-
2007
- 2007-07-03 CN CNU2007200321830U patent/CN201096561Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105509951A (en) * | 2016-01-13 | 2016-04-20 | 中南大学 | Compression type remolded soil pore pressure testing device |
| CN106197816A (en) * | 2016-08-05 | 2016-12-07 | 机科发展科技股份有限公司 | A kind of A seating sensor measuring boom support member stress |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080806 Termination date: 20130703 |