CN203422180U - Strain axis type soil pressure sensor - Google Patents
Strain axis type soil pressure sensor Download PDFInfo
- Publication number
- CN203422180U CN203422180U CN201320341852.8U CN201320341852U CN203422180U CN 203422180 U CN203422180 U CN 203422180U CN 201320341852 U CN201320341852 U CN 201320341852U CN 203422180 U CN203422180 U CN 203422180U
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- CN
- China
- Prior art keywords
- cover plate
- ring
- pressure sensor
- elastic shaft
- cross
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- 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
Links
- 239000002689 soil Substances 0.000 title claims abstract description 24
- 239000003292 glue Substances 0.000 claims abstract description 8
- 230000035945 sensitivity Effects 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 239000011888 foil Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The utility model discloses a strain axis type soil pressure sensor. The strain axis type soil pressure sensor comprises a cover plate, a seal ring, a through hole, wiring boards, resistance strain gages, an elastic shaft, a baseplate, a stress ring, a connecting wire, waterproof sealing glue and a temperature compensation strain gage, wherein the cover plate and the baseplate have the same structures, and are arranged symmetrically; the opposite outer side surfaces of the cover plate and the baseplate are round; corresponding ring-shaped bulges are arranged at the edges of a circle of the opposite inner side surfaces of the cover plate and the baseplate; the seal rings are sleeved with the ring-shaped bulges; the temperature compensation strain gage is arranged on the inner side surface of the cover plate; the through hole is formed in the center position of the cover plate; the two ends of the stress ring are connected to the cover plate and the baseplate through the seal rings; the elastic shaft is arranged in the stress ring in a cross manner, and the four end points of the elastic shaft are connected to the inner wall of the stress ring; the elastic shaft stretches outward from the cross points to form four supporting rods provided with the resistance strain gages. The strain axis type soil pressure sensor is high in measuring sensitivity, good in precision and high in reliability, has an obvious measuring effect on earth pressure of the rigid contact surface, and is simple in structure and low in cost.
Description
Technical field
The utility model belongs to pressure detection technical field, relates in particular to a kind of strain shaft type soil pressure sensor.
Background technology
Along with increasing sharply of urban population, traffic problems become increasingly conspicuous.Subway, light rail are large with its freight volume, speed is fast, safe and reliable, move the feature such as punctual and become the important means that solves urban transportation.In the prospective design of subway, light rail, (K0 is that the soil body is without under lateral deformation condition to the Stationary side pressure coefficient K0 of each soil layer, side direction effective stress and the axially ratio of effective stress, K0=R3/R1) can reflect that in ground, level, to the variation of stress, can directly be extrapolated pressure distribution and the engineering safety acting on Retaining Structures thus.So generally all require test Stationary side pressure coefficient K0 value in subway, light rail, base pit engineering prospecting.And existing lateral pressure coefficient detector is comparatively complicated heavy on present market, and because numerous instrument actuating mediums are liquid, so temperature influence is larger, and also can affect to environment.
Summary of the invention
The purpose of this utility model is the problem existing for existing instrument, proposes a kind of strain shaft type soil pressure sensor.The difference of this sensor and transverse pressure vertical to it by Earth Pressure Around, at vertical pivot to producing unequal distortion with X direction.By modified difference, calculate the lateral pressure coefficient that can record the soil body.
The utility model comprises cover plate, O-ring seal, through hole, terminal block, resistance strain gage, elastic shaft, base plate, stressed ring, connecting line, anti-water seal glue, temperature compensation foil gauge.
Cover plate is identical with base arrangement, and symmetrical installation, the lateral surface that cover plate is relative with base plate is circle, the edge of relative medial surface circle is provided with corresponding annular protrusion, O-ring seal is enclosed within on annular protrusion, the medial surface of cover plate is provided with temperature compensation foil gauge, and the home position of cover plate has through hole;
Stressed ring is the cylindrical shape of both ends open, and its two ends are all connected with base plate with cover plate by O-ring seal, is provided with anti-water seal glue in stressed ring, guarantees the leakproofness in stressed ring; Elastic shaft is cross type, is arranged in stressed ring, and its four end points are connected with the centre position of stressed ring inwall;
Described elastic shaft is outward extending four poles from point of crossing, and structure is identical, and are divided into three sections of left, center, rights, and the interlude that in each pole, length is L dwindles cross section; Resistance strain gage is installed respectively on the interlude after dwindling cross section;
Two pin of described temperature compensation foil gauge and four resistance strain gages respectively terminal block are corresponding thereto connected, five terminal blocks are all connected with one end of connecting line, the other end of connecting line has through hole through cover plate home position, then by sealant sealing through hole.
The length L of described interlude is determined according to the concrete model of resistance strain gage, its cross section dwindling according to reality required sensitivity determine, the cross section of interlude is less, its sensitivity is higher.
The utility model course of work is as follows:
During use, the utility model is embedded in the soil body, its stressed ring is subject to the soil body side force of earthing axial force and level.The difference in size of the power of both direction causes two, stressed ring axially to produce unequal distortion.By the size of stressed annular strain, can learn the size of two axial soil pressure values, and then can learn the size of the soil lateral pressure of the soil body.
Beneficial effect of the present invention is as follows:
1, measure highly sensitively, precision is good, and reliability is high;
2, remarkable to the measurement effect of soil pressure in rigid contact surfaces;
3, simple in structure, cost is low;
4, the resistance variations that each active gage is caused by temperature can be offset by temperature compensation sheet.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the utility model sectional view.
In figure: cover plate 1, O-ring seal 2, through hole 3, terminal block 4, resistance strain gage 5, elastic shaft 6, base plate 7, stressed ring 8, connecting line 9, anti-water seal glue 10, temperature compensation foil gauge 11.
Embodiment
As shown in Figure 1 and Figure 2, strain shaft type soil pressure sensor, comprises cover plate 1, O-ring seal 2, through hole 3, terminal block 4, resistance strain gage 5, elastic shaft 6, base plate 7, stressed ring 8, connecting line 9, anti-water seal glue 10, temperature compensation foil gauge 11.
As shown in Figure 2, cover plate 1 is identical with base plate 7 structures, and symmetrical installation, the lateral surface that cover plate 1 is relative with base plate 7 is circle, the edge of relative medial surface circle is provided with corresponding annular protrusion, O-ring seal 2 is enclosed within on annular protrusion, and the medial surface of cover plate 1 is provided with temperature compensation foil gauge 11, and the home position of cover plate 1 has through hole 3;
Stressed ring 8 is the cylindrical shape of both ends open, and its two ends are all connected with base plate 7 with cover plate 1 by O-ring seal 2, is provided with anti-water seal glue 10 in stressed ring 8, guarantees the leakproofness in stressed ring 8; As shown in Figure 1, elastic shaft 6 is cross type, is arranged in stressed ring 8, and its four end points are connected with the centre position of stressed ring 8 inwalls;
As shown in Figure 1, described elastic shaft 6 is outward extending four poles from point of crossing, and structure is identical, and is divided into three sections of left, center, rights, and the interlude that in each pole, length is L dwindles cross section; Resistance strain gage 5 is installed respectively on the interlude after dwindling cross section;
Two pin of described temperature compensation foil gauge 11 and four resistance strain gages 5 respectively terminal block 4 are corresponding thereto connected, five terminal blocks 4 are all connected with one end of connecting line 9, the other end of connecting line 9 has through hole 3 through cover plate 1 home position, then by sealant sealing through hole 3.
The length L of described interlude is determined according to the concrete model of resistance strain gage 5, its cross section dwindling according to reality required sensitivity determine, the cross section of interlude is less, its sensitivity is higher.
The utility model course of work is as follows:
During use, the utility model is embedded in the soil body, its stressed ring is subject to the soil body side force of earthing axial force and level.The difference in size of the power of both direction causes two, stressed ring axially to produce unequal distortion.By the size of stressed annular strain, can learn the size of two axial soil pressure values, and then can learn the size of the soil lateral pressure of the soil body.
Claims (2)
1. strain shaft type soil pressure sensor, is characterized in that comprising cover plate, O-ring seal, through hole, terminal block, resistance strain gage, elastic shaft, base plate, stressed ring, connecting line, anti-water seal glue, temperature compensation foil gauge;
Cover plate is identical with base arrangement, and symmetrical installation, the lateral surface that cover plate is relative with base plate is circle, the edge of relative medial surface circle is provided with corresponding annular protrusion, O-ring seal is enclosed within on annular protrusion, the medial surface of cover plate is provided with temperature compensation foil gauge, and the home position of cover plate has through hole;
Stressed ring is the cylindrical shape of both ends open, and its two ends are all connected with base plate with cover plate by O-ring seal, is provided with anti-water seal glue in stressed ring, guarantees the leakproofness in stressed ring; Elastic shaft is cross type, is arranged in stressed ring, and its four end points are connected with the centre position of stressed ring inwall;
Described elastic shaft is outward extending four poles from point of crossing, and structure is identical, and are divided into three sections of left, center, rights, and the interlude that in each pole, length is L dwindles cross section; Resistance strain gage is installed respectively on the interlude after dwindling cross section;
Two pin of described temperature compensation foil gauge and four resistance strain gages respectively terminal block are corresponding thereto connected, five terminal blocks are all connected with one end of connecting line, the other end of connecting line has through hole through cover plate home position, then by sealant sealing through hole.
2. strain shaft type soil pressure sensor as claimed in claim 1, the length L that it is characterized in that described interlude is determined according to the concrete model of resistance strain gage, its cross section dwindling according to reality required sensitivity determine, the cross section of interlude is less, its sensitivity is higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320341852.8U CN203422180U (en) | 2013-06-14 | 2013-06-14 | Strain axis type soil pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320341852.8U CN203422180U (en) | 2013-06-14 | 2013-06-14 | Strain axis type soil pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203422180U true CN203422180U (en) | 2014-02-05 |
Family
ID=50021275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320341852.8U Expired - Fee Related CN203422180U (en) | 2013-06-14 | 2013-06-14 | Strain axis type soil pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203422180U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106768499A (en) * | 2016-11-16 | 2017-05-31 | 中北大学 | Fluid pressure type soil pressure sensor |
| CN108627290A (en) * | 2018-06-07 | 2018-10-09 | 广西大学 | A method of improving bridge strain monitoring sensitivity |
-
2013
- 2013-06-14 CN CN201320341852.8U patent/CN203422180U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106768499A (en) * | 2016-11-16 | 2017-05-31 | 中北大学 | Fluid pressure type soil pressure sensor |
| CN106768499B (en) * | 2016-11-16 | 2023-08-08 | 中北大学 | Hydraulic soil pressure sensor |
| CN108627290A (en) * | 2018-06-07 | 2018-10-09 | 广西大学 | A method of improving bridge strain monitoring sensitivity |
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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: 20140205 Termination date: 20140614 |
|
| EXPY | Termination of patent right or utility model |