CN104316227A - Double-faced pressure sensing type soil pressure sensor - Google Patents
Double-faced pressure sensing type soil pressure sensor Download PDFInfo
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- CN104316227A CN104316227A CN201410615858.9A CN201410615858A CN104316227A CN 104316227 A CN104316227 A CN 104316227A CN 201410615858 A CN201410615858 A CN 201410615858A CN 104316227 A CN104316227 A CN 104316227A
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Abstract
The invention discloses a double-faced pressure sensing type soil pressure sensor which comprises an outer shell, an inner shell, a sealing device and a junction device. The outer shell is arranged outside the inner shell. Silicone oil is arranged between the inner shell and the outer shell. The inner shell is of a cylindrical structure. The junction device and the sealing device are arranged at the two symmetrical ends of the cylindrical face of the inner shell. The sealing device carries out sealing through steel balls and screws. The junction device is connected with a lead through a lead tube on the inner shell. When the double-faced pressure sensing type soil pressure sensor measures soil pressure, the matching error of the sensor and soil media is not sensitive to changes of the height-diameter ratio, the density ratio and load rise time of the sensor and has the small and stable value, and the double-faced pressure sensing type soil pressure sensor is particularly suitable for dynamic soil pressure measurement.
Description
Technical field
The invention belongs to field of sensing technologies, particularly relate to a kind of two-sided pressure sensing type soil pressure sensor.
Background technology
In rock soil medium, soil pressure measurement is an important content of soil mechanics theory and Geotechnical Engineering experimental study, the solution of a large amount of Geotechnical Engineering theory and practical problems, the often on-the-spot prototype of main dependence or the direct measurement result of model test, particularly many research topics relate to the dynamically pressure testing in Blast Load soil under action or on the body structure surface be buried in the earth in recent years, the basic skills that current soil pressure is measured adopts soil pressure sensor to be embedded in the soil body or be embedded on the surface of works in soil directly to measure pressure in soil, soil pressure sensor remains the basic tool that experimental study in soil-structure interactions is carried out in countries in the world.
Pressure survey in rock soil medium and general liquid, pressure survey in the fluid media (medium)s such as air differs widely, during pressure survey in rock soil medium, sensor is imbedded in medium, because sensor is not identical with the physically-based model of surrounding medium, the stress field that medium is original certainly will be changed, stress is caused to concentrate and distribution again phenomenon, the actual pressure that sensor the is recorded true pressure original with this place is not identical, consequent error claims " matching error " usually, the ratio of height to diameter (thickness of sensor and the diameter ratio of sensor) of " matching error " and soil pressure sensor, the mass density ratio of sensor and soil-structure interactions, the overall elastic modulus in sensor sensing face is relevant with factors such as the modular ratios of soil-structure interactions, dynamic soil pressure is measured, dynamic matching error is also relevant with rise time of compressive load etc., due to sensor during for reducing to measure, do not mate between medium and the matching error caused, pressure survey in rock soil medium has strict requirement to mechanical properties such as the physical dimension of soil pressure sensor and the equivalent elastic modulus of sensitive area, when measuring pressure in rock soil medium, there is little and stable static state and dynamic matching error for reaching soil pressure sensor, soil pressure sensor should be flat structure, for the soil pressure sensor of one side sensitivity, require that the ratio of height to diameter of sensor should not be greater than 0.3, and soil pressure sensor conventional at present mainly contains type vibration wire, resistance-strain type, differential resistance type, vapour-pressure type, inductive frequency and novel fiber grating formula etc., these soil pressure sensors are mainly used in building, railway, traffic, water power, dam, the basis of the engineering fields such as tunnel and other soil pressure are measured, substantially be one side sensitive structure, along with the fields such as protection works are to the increase of blast impulse pressure test demand in soil, for solving the matching problem of sensor in earth pressure test process and soil-structure interactions, these sensors can not meet the ratio of height to diameter of dynamic matching error to sensor, the change requirement of density ratio and load rise time.
Summary of the invention
The object of this invention is to provide a kind of two-sided pressure sensing type soil pressure sensor, if this sensor main is the matching problem solving sensor in earth pressure test process and soil-structure interactions.
The two-sided pressure sensing type soil pressure sensor of one of the present invention, comprise shell body, inner housing, packoff and termination, shell body is provided with in the outside of inner housing, silicone oil is provided with between inner housing and shell body, inner housing is cylindrical-shaped structure, two ends symmetrical on its face of cylinder are provided with termination and packoff, and packoff carries out shutoff by steel ball and screw, and termination is connected with lead-in wire by the fairlead on inner housing;
Described inner housing is cylindrical-shaped structure, and the middle part of inner housing is provided with hole, and the two ends of inner housing symmetry on its face of cylinder are also provided with hole.
Described shell body is made up of upper diaphragm and lower diaphragm two parts, and upper diaphragm and lower diaphragm form the hollow structure of column type, and the inner two ends of shell body are connected with inner housing respectively by helicitic texture.
Described termination is made up of sealing adaptor, pressure chip and fairlead, sealing adaptor is arranged on the hole place of inner housing one end, sealing adaptor one end is inserted in hole, the other end of sealing adaptor is provided with pressure chip, fairlead one end is inserted in the hole of inner housing, in fairlead, be provided with lead-in wire, go between through the hole arranged in inner housing, lead-in wire one end is connected with sealing adaptor.
Described packoff is arranged in the hole of the inner housing other end, and packoff is made up of steel ball and screw, and steel ball is arranged in the hole of inner housing, carries out shutoff in the hole that screw is inserted into inner housing to steel ball.
Described sealing adaptor is provided with aperture, and pressure chip is provided with connecting line, and connecting line makes pressure chip be connected with sealing adaptor through the aperture on sealing adaptor.
Described pressure chip is made by silicon piezoresistance type, thick film ceramic or thick-film capacitor.
Technique effect of the present invention is, adopt double-sided symmetrical sensitive structure and periphery fixed circular flat diaphragm structure, when measuring soil pressure, matching error between sensor and soil-structure interactions is extremely insensitive to the ratio of height to diameter of sensor, density ratio and the change of load rise time, especially when measuring soil pressure in rock soil medium, dynamic matching error has little and stable value, is particularly suitable for the measurement of dynamic soil pressure.Structure of the present invention is simple, and processing and fabricating is convenient, is suitable for batch production.
Accompanying drawing explanation
Fig. 1 is cross-sectional view of the present invention.
In figure: 1, upper diaphragm; 2, inner housing; 3, fairlead; 4, go between; 5, sealing adaptor; 6, lower diaphragm; 7, pressure chip; 8, steel ball; 9, screw; 10, silicone oil.
Embodiment
See Fig. 1, the two-sided pressure sensing type soil pressure sensor of one of the present invention, comprise shell body, inner housing, packoff and termination, shell body is provided with in the outside of inner housing, be provided with silicone oil between inner housing and shell body, inner housing is cylindrical-shaped structure, and two ends symmetrical on its face of cylinder are provided with termination and packoff, packoff carries out shutoff by steel ball 8 and screw 9, and termination is connected with lead-in wire 4 by the fairlead 3 on inner housing.
Described inner housing 2 is cylindrical-shaped structure, and the middle part of inner housing is provided with hole, and the two ends of inner housing symmetry on its face of cylinder are also provided with hole.
Described shell body is made up of upper diaphragm 1 and lower diaphragm 6, and upper diaphragm 1 and lower diaphragm 6 form the hollow structure of column type, and the inner two ends of shell body are connected with inner housing 2 respectively by helicitic texture.
Described termination is made up of sealing adaptor 5, pressure chip 7 and fairlead 3, sealing adaptor is arranged on the hole place of inner housing 2 one end, sealing adaptor 5 one end is inserted in hole, the other end of sealing adaptor is provided with pressure chip 7, fairlead 3 one end is inserted in the hole of inner housing 2, in fairlead 3, be provided with lead-in wire, lead-in wire 4 is through the hole arranged in inner housing 2, and 4 one end that go between are connected with sealing adaptor 5.
Described packoff is arranged in the hole of the inner housing other end, and packoff is made up of steel ball 8 and screw 8, and steel ball 8 is arranged in the hole of inner housing 2, carries out shutoff in the hole that screw 9 is inserted into inner housing 2 to steel ball 8.
Described sealing adaptor 5 is provided with aperture, and pressure chip 7 is provided with connecting line, and connecting line makes pressure chip 7 be connected with sealing adaptor 5 through the aperture on sealing adaptor 5.
Described pressure chip 7 is made by silicon piezoresistance type, thick film ceramic or thick-film capacitor.
The two-sided pressure sensing type soil pressure sensor of one that the present invention announces, step is in use as follows:
A (), according to design size and tolerance processing upper diaphragm 1, lower diaphragm 6, inner housing 2, sealing adaptor 5, fairlead 3, screw 9, the pressure-sensitive diaphragm thickness wherein in diaphragm 1 and lower diaphragm 6 and diameter can vary in size according to the range of sensor;
B the connecting line of pressure chip 7 is passed the aperture in sealing adaptor 5 by (), and sealed by connecting line with fluid sealant, is fixed on by pressure chip 7 on sealing adaptor 5;
C the sealing adaptor 5 machined in (b) is connected with lead-in wire 4 by (), and sealing adaptor 5 and fairlead 3 are positioned in the hole of inner housing 2, then fixes with fluid sealant;
D the inner housing 2 being fixed with pressure chip 7 assembles with upper diaphragm 1, lower diaphragm 6 by ();
E cavity in the sensor assembled in step (d) is full of silicone oil by ();
F () takes out sensor, steel ball 8 is put into the hole of inner housing 2, and compress steel ball 8 with screw 9, realize the sealing to silicone oil in sensor cavity 10;
G the redundance of screw 9 is clipped by (), and adopt laser bonding mode by screw 9 and case weld, so far, completes the processing of sensor.
Claims (6)
1. a two-sided pressure sensing type soil pressure sensor, comprise shell body, inner housing, packoff and termination, it is characterized in that: be provided with shell body in the outside of inner housing, silicone oil is provided with between inner housing and shell body, inner housing is cylindrical-shaped structure, two ends symmetrical on its face of cylinder are provided with termination and packoff, and packoff carries out shutoff by steel ball and screw, and termination is connected with lead-in wire by the fairlead on inner housing.
2. two-sided pressure sensing type soil pressure sensor according to claim 1, is characterized in that: described inner housing is cylindrical-shaped structure, and the middle part of inner housing is provided with hole, and the two ends of inner housing symmetry on its face of cylinder are also provided with hole.
3. two-sided pressure sensing type soil pressure sensor according to claim 1, it is characterized in that: described shell body is made up of upper diaphragm and lower diaphragm two parts, upper diaphragm and lower diaphragm all adopt periphery fixed circular flat diaphragm structure, and upper diaphragm is connected with inner housing respectively by helicitic texture with lower diaphragm.
4. two-sided pressure sensing type soil pressure sensor according to claim 1, it is characterized in that: described termination is made up of sealing adaptor, pressure chip and fairlead, sealing adaptor is arranged on the hole place of inner housing one end, sealing adaptor one end is inserted in hole, the other end of sealing adaptor is provided with pressure chip, and fairlead one end is inserted in the hole of inner housing, in fairlead, be provided with lead-in wire, lead-in wire is through the hole arranged in inner housing, and lead-in wire one end is connected with sealing adaptor.
5. two-sided pressure sensing type soil pressure sensor according to claim 1, it is characterized in that: described packoff is arranged in the hole of the inner housing other end, packoff is made up of steel ball and screw, and steel ball is arranged in the hole of inner housing, carries out shutoff in the hole that screw is inserted into inner housing to steel ball.
6. two-sided pressure sensing type soil pressure sensor according to claim 1, is characterized in that: described pressure chip is made by silicon piezoresistance type, thick film ceramic or thick-film capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410615858.9A CN104316227B (en) | 2014-11-05 | 2014-11-05 | A kind of two-sided pressure sensing type soil pressure sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410615858.9A CN104316227B (en) | 2014-11-05 | 2014-11-05 | A kind of two-sided pressure sensing type soil pressure sensor |
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| CN104316227A true CN104316227A (en) | 2015-01-28 |
| CN104316227B CN104316227B (en) | 2016-07-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105938028A (en) * | 2016-05-17 | 2016-09-14 | 东北农业大学 | Wireless soil pressure sensor based on air pressure monitoring method |
| CN106768499A (en) * | 2016-11-16 | 2017-05-31 | 中北大学 | Fluid pressure type soil pressure sensor |
| CN109781310A (en) * | 2019-03-07 | 2019-05-21 | 重庆科技学院 | Soil pressure testing device and test method |
| CN114018473A (en) * | 2021-11-16 | 2022-02-08 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | Soil pressure sensor calibrating device |
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| CN86100136A (en) * | 1986-01-15 | 1987-07-29 | 中国人民解放军八九○○二部队 | Oil-chamberless diaphragm type soil-pressure transducer |
| US4935841A (en) * | 1987-02-12 | 1990-06-19 | Johnsson & Billquist Development Ab | Pressure sensor |
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| CN102519630A (en) * | 2011-12-06 | 2012-06-27 | 昆明理工大学 | Double-membrane soil pressure sensor based on hydraulic transmission |
| CN202870024U (en) * | 2012-10-19 | 2013-04-10 | 沈阳建筑大学 | Intelligent piezoelectric aggregate sensor for concrete structure |
| CN103674353A (en) * | 2013-12-20 | 2014-03-26 | 中南大学 | Concrete stress sensor by piezoelectric properties of PVDF (polyvinylidene fluoride) film |
| CN204154424U (en) * | 2014-11-05 | 2015-02-11 | 中国人民解放军总参谋部工程兵科研三所 | A kind of two-sided pressure sensing type soil pressure sensor |
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2014
- 2014-11-05 CN CN201410615858.9A patent/CN104316227B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN86100136A (en) * | 1986-01-15 | 1987-07-29 | 中国人民解放军八九○○二部队 | Oil-chamberless diaphragm type soil-pressure transducer |
| US4935841A (en) * | 1987-02-12 | 1990-06-19 | Johnsson & Billquist Development Ab | Pressure sensor |
| JP2002501621A (en) * | 1998-04-01 | 2002-01-15 | ヘンニ・インストウルメンツ・アクチエンゲルシヤフト | Differential pressure measurement transducer |
| CN102519630A (en) * | 2011-12-06 | 2012-06-27 | 昆明理工大学 | Double-membrane soil pressure sensor based on hydraulic transmission |
| CN202870024U (en) * | 2012-10-19 | 2013-04-10 | 沈阳建筑大学 | Intelligent piezoelectric aggregate sensor for concrete structure |
| CN103674353A (en) * | 2013-12-20 | 2014-03-26 | 中南大学 | Concrete stress sensor by piezoelectric properties of PVDF (polyvinylidene fluoride) film |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105938028A (en) * | 2016-05-17 | 2016-09-14 | 东北农业大学 | Wireless soil pressure sensor based on air pressure monitoring method |
| 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 |
| CN109781310A (en) * | 2019-03-07 | 2019-05-21 | 重庆科技学院 | Soil pressure testing device and test method |
| CN109781310B (en) * | 2019-03-07 | 2023-11-24 | 重庆科技学院 | Soil pressure testing device and testing method |
| CN114018473A (en) * | 2021-11-16 | 2022-02-08 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | Soil pressure sensor calibrating device |
| CN114018473B (en) * | 2021-11-16 | 2023-10-24 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | Soil pressure sensor calibrating device |
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| CN104316227B (en) | 2016-07-13 |
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