CN202066629U - Strain beam type earth pressure sensor - Google Patents
Strain beam type earth pressure sensor Download PDFInfo
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- CN202066629U CN202066629U CN2010206904736U CN201020690473U CN202066629U CN 202066629 U CN202066629 U CN 202066629U CN 2010206904736 U CN2010206904736 U CN 2010206904736U CN 201020690473 U CN201020690473 U CN 201020690473U CN 202066629 U CN202066629 U CN 202066629U
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- elastic beam
- transmission shaft
- housing
- force transmission
- cover plate
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Abstract
应变梁式土压力传感器，包括中空的壳体和封闭壳体的盖板，壳体的内腔中设有弹性梁和传力轴，壳体的底部设有一圈向上延伸的台阶，弹性梁架设于台阶上；弹性梁的上、下表面均设有电阻值相同的电阻应变片和与电阻应变片配套的接线板，电阻应变片之间通过导线连接形成惠斯通电桥，惠斯通电桥通过连接线与应变仪连接，壳体上设有允许连接线穿出的通孔；弹性梁和盖板之间设置传力轴，传力轴一端与盖板接触、另一端与弹性梁接触。本实用新型具有能够适用于各种刚度土体土压力测量并可以排除温度影响的优点。
The strain beam type earth pressure sensor includes a hollow shell and a cover plate that closes the shell. The inner cavity of the shell is provided with an elastic beam and a force transmission shaft. The bottom of the shell is provided with a circle of steps extending upward. Above; the upper and lower surfaces of the elastic beam are provided with resistance strain gauges with the same resistance value and a terminal board matched with the resistance strain gauges. The resistance strain gauges are connected by wires to form a Wheatstone bridge, and the Wheatstone bridge is connected by connecting wires. It is connected with the strain gauge, and the housing is provided with a through hole that allows the connecting wire to pass through; a force transmission shaft is arranged between the elastic beam and the cover plate, and one end of the force transmission shaft is in contact with the cover plate, and the other end is in contact with the elastic beam. The utility model has the advantages of being applicable to soil pressure measurement of soil bodies with various rigidities and eliminating the influence of temperature.
Description
Technical field
The utility model relates to the pressure detection field, is strain beam type soil pressure sensor exactly.
Technical background
The soil pressure force measurement is an importance of soil mechanics theory and experimental study, also is the important content in the engineering test, and existing soil pressure cell can not record actual soil pressure value well.Remove outside the data distortion that the influence of various factors in the soil makes that soil pressure cell records, soil pressure cell is from the principle aspect deficiency being arranged also.Existing diaphragm type soil pressure cell includes and offers the flexible sheet that concave surface forms in box body, lid and the box body, realizes the soil pressure force measurement by the resistance strain gage that is covered with on the flexible sheet.The structure of this soil pressure cell makes it be only applicable to the measurement of full flexible load, and is not too suitable to the load that certain rigidity is arranged.But the rigidity of the soil body is normally between rigidity and flexibility, therefore this soil pressure sensor timing signal in water is very accurate, and when measuring soil pressure, usually produce than mistake, when especially measuring the bigger soil body soil pressure of rigidity, the result is not ideal.
Summary of the invention
For overcoming the above-mentioned shortcoming of prior art, the utility model provides a kind of strain beam type soil pressure sensor that can be applicable to various rigidity soil body soil pressures measurements and can get rid of temperature effect.
Strain beam type soil pressure sensor, the cover plate that comprises hollow housing and closure casing, be provided with elastic beam and force transmission shaft in the inner chamber of described housing, the bottom of described housing is provided with the upwardly extending step of a circle, and described elastic beam is set up on the described step;
The upper and lower surface of described elastic beam be equipped with the identical resistance strain gage of resistance value and with the supporting terminal block of resistance strain gage, be connected to form Wheatstone bridge by lead between the described resistance strain gage, described Wheatstone bridge is connected with strainmeter by connecting line, and described housing is provided with the through hole that allows described connecting line to pass;
Described force transmission shaft is set between described elastic beam and the cover plate, and described force transmission shaft one end contacts with cover plate, the other end contacts with elastic beam.
Further, be provided with O-ring seal between described cover plate and the housing; Described housing inner chamber is filled with water-proof elastic sealing glue.
Further, described housing is cylindrical, and described housing is formed by base plate with the affixed stack shell of base plate; Described step is arranged on the base plate, and described step is a circle annulus, and described step and stack shell are by being threaded.
Further, described force transmission shaft and described elastic beam are affixed.
Technical conceive of the present utility model is: in the housing inner chamber elastic beam is set, and at the both sides of elastic beam adhering resistance strain sheets and terminal block, resistance strain gage is connected into Wheatstone bridge.The soil pressure that is applied in the test on the circular cover is delivered on the elastic beam by force transmission shaft, causes elastic beam generation small strain, and then makes the foil gauge resistance that sticks on the beam change.The characteristics of elastic beam distortion are that upper surface shortens, the lower surface elongation, different variations takes place in this foil gauge resistance that will cause sticking on the beam upper and lower surface, though the distortion of beam is very small, can detect accurately by strainmeter through behind the amplification of Wheatstone bridge.Just can obtain the corresponding relation that soil pressure and strain-ga(u)ge reading change through after demarcating.
The beneficial effects of the utility model are: 1, no matter the soil pressure of the soil body of which kind of rigidity is measured and all can well be suitable for; 2, each active gage equates that by the resistance change rate that temperature causes temperature effect is cancelled out each other in bridge circuit; 3, by the gap size between control circular cover and the housing can the limit strain beam maximum deformation quantity, prevent to cause the sensor damage owing to passing load is excessive; 4, measurement is highly sensitive, and precision is good, the reliability height.
Description of drawings
Fig. 1 is a cut-open view of the present utility model.
Fig. 2 is a decomposing schematic representation of the present utility model.
Fig. 3 is the synoptic diagram of elastic beam.
Embodiment
With reference to accompanying drawing, further specify the utility model:
Strain beam type soil pressure sensor, the cover plate 1 that comprises hollow housing and closure casing, be provided with elastic beam 6 and force transmission shaft 3 in the inner chamber of described housing, the bottom of described housing is provided with the upwardly extending step 12 of a circle, and described elastic beam 6 is set up on the described step 12;
The upper and lower surface of described elastic beam 6 be equipped with the identical resistance strain gage of resistance value 5 and with the supporting terminal block 4 of resistance strain gage 5, be connected to form Wheatstone bridge by lead between the described resistance strain gage 5, described Wheatstone bridge is connected with strainmeter by connecting line 9, and described housing is provided with the through hole 10 that allows described connecting line 9 to pass;
Described force transmission shaft 3 is set between described elastic beam 6 and the cover plate 1, and described force transmission shaft 3 one ends contact with cover plate 1, the other end contacts with elastic beam 6.
Be provided with O-ring seal 2 between described cover plate 1 and the housing; Described housing inner chamber is filled with water-proof elastic sealing glue 11.
Described housing is cylindrical, and described housing is formed by base plate 7 with the affixed stack shell 8 of base plate 7; Described step 12 is arranged on the base plate 7, and described step 12 is a circle annulus, and described step 12 and stack shell 8 are by being threaded.
Described force transmission shaft 3 and described elastic beam 6 are affixed.
Technical conceive of the present utility model is: in the housing inner chamber elastic beam is set, and at the both sides of elastic beam adhering resistance strain sheets and terminal block, resistance strain gage is connected into Wheatstone bridge.The soil pressure that is applied in the test on the circular cover is delivered on the elastic beam by force transmission shaft, causes elastic beam generation small strain, and then makes the foil gauge resistance that sticks on the beam change.The characteristics of elastic beam distortion are that upper surface shortens, the lower surface elongation, different variations takes place in this foil gauge resistance that will cause sticking on the beam upper and lower surface, though the distortion of beam is very small, can detect accurately by strainmeter through behind the amplification of Wheatstone bridge.Just can obtain the corresponding relation that soil pressure and strain-ga(u)ge reading change through after demarcating.
The described content of this instructions embodiment only is enumerating the way of realization of utility model design; protection domain of the present utility model should not be regarded as only limiting to the concrete form that embodiment states, protection domain of the present utility model also reach in those skilled in the art according to the utility model design the equivalent technologies means that can expect.
Claims (4)
1. strain beam type soil pressure sensor, it is characterized in that: the cover plate that comprises hollow housing and closure casing, be provided with elastic beam and force transmission shaft in the inner chamber of described housing, the bottom of described housing is provided with the upwardly extending step of a circle, and described elastic beam is set up on the described step;
The upper and lower surface of described elastic beam be equipped with the identical resistance strain gage of resistance value and with the supporting terminal block of resistance strain gage, be connected to form Wheatstone bridge by lead between the described resistance strain gage, described Wheatstone bridge is connected with strainmeter by connecting line, and described housing is provided with the through hole that allows described connecting line to pass;
Described force transmission shaft is set between described elastic beam and the cover plate, and described force transmission shaft one end contacts with cover plate, the other end contacts with elastic beam.
2. strain beam type soil pressure sensor as claimed in claim 1 is characterized in that: be provided with O-ring seal between described cover plate and the housing; Described housing inner chamber is filled with water-proof elastic sealing glue.
3. strain beam type soil pressure sensor as claimed in claim 2, it is characterized in that: described housing is cylindrical, and described housing is formed by base plate with the affixed stack shell of base plate; Described step is arranged on the base plate, and described step is a circle annulus, and described step and stack shell are by being threaded.
4. as the described strain beam type of one of claim 1-3 soil pressure sensor, it is characterized in that: described force transmission shaft and described elastic beam are affixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206904736U CN202066629U (en) | 2010-12-30 | 2010-12-30 | Strain beam type earth pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206904736U CN202066629U (en) | 2010-12-30 | 2010-12-30 | Strain beam type earth pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202066629U true CN202066629U (en) | 2011-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206904736U Expired - Fee Related CN202066629U (en) | 2010-12-30 | 2010-12-30 | Strain beam type earth pressure sensor |
Country Status (1)
| Country | Link |
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| CN (1) | CN202066629U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706548A (en) * | 2012-05-30 | 2012-10-03 | 冯平 | Bolt or nut loosening monitoring device |
| CN103335755A (en) * | 2013-06-14 | 2013-10-02 | 浙江大学 | Strain axis type soil pressure sensor |
| CN104764554A (en) * | 2015-04-22 | 2015-07-08 | 中国工程物理研究院总体工程研究所 | Sputtering thin film type pore water pressure sensor |
| CN105997089A (en) * | 2016-06-24 | 2016-10-12 | 上海仪器仪表研究所 | Analysis device and method for sleep-disordered breathing |
| CN111512131A (en) * | 2017-12-19 | 2020-08-07 | 康蒂泰克振动控制有限公司 | elastic support element |
| CN111855043A (en) * | 2020-07-31 | 2020-10-30 | 长飞光纤光缆股份有限公司 | Fiber grating soil pressure sensor |
| CN112798039A (en) * | 2020-12-26 | 2021-05-14 | 北京工业大学 | A device and installation method for monitoring multi-dimensional stress and strain inside a reinforced concrete member |
-
2010
- 2010-12-30 CN CN2010206904736U patent/CN202066629U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706548A (en) * | 2012-05-30 | 2012-10-03 | 冯平 | Bolt or nut loosening monitoring device |
| CN102706548B (en) * | 2012-05-30 | 2014-08-20 | 冯平 | Bolt or nut loosening monitoring device |
| CN103335755A (en) * | 2013-06-14 | 2013-10-02 | 浙江大学 | Strain axis type soil pressure sensor |
| CN104764554A (en) * | 2015-04-22 | 2015-07-08 | 中国工程物理研究院总体工程研究所 | Sputtering thin film type pore water pressure sensor |
| CN105997089A (en) * | 2016-06-24 | 2016-10-12 | 上海仪器仪表研究所 | Analysis device and method for sleep-disordered breathing |
| CN111512131A (en) * | 2017-12-19 | 2020-08-07 | 康蒂泰克振动控制有限公司 | elastic support element |
| CN111855043A (en) * | 2020-07-31 | 2020-10-30 | 长飞光纤光缆股份有限公司 | Fiber grating soil pressure sensor |
| CN111855043B (en) * | 2020-07-31 | 2022-03-22 | 长飞光纤光缆股份有限公司 | Fiber grating soil pressure sensor |
| CN112798039A (en) * | 2020-12-26 | 2021-05-14 | 北京工业大学 | A device and installation method for monitoring multi-dimensional stress and strain inside a reinforced concrete member |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Kuihua Inventor after: Ma Shaojun Inventor after: Wu Denghui Inventor after: Wu Wenbing Inventor after: Luo Yongjian Inventor after: Wang Ning Inventor after: Xu Songjie Inventor after: Ying Jiankun Inventor before: Wang Kuihua Inventor before: Ma Shaojun Inventor before: Wu Denghui Inventor before: Wu Wenbing Inventor before: Luo Yongjian Inventor before: Wang Ning |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: WANG KUIHUA MA SHAOJUN WU DENGHUI WU WENBING LUO YONGJIAN WANG NING TO: WANG KUIHUA MA SHAOJUN WU DENGHUI WU WENBING LUO YONGJIAN WANG NING XU SONGJIE YING JIANKUN |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111207 Termination date: 20121230 |