CN102410894A - Interface pressure distribution testing sensing element - Google Patents
Interface pressure distribution testing sensing element Download PDFInfo
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- CN102410894A CN102410894A CN2011102188577A CN201110218857A CN102410894A CN 102410894 A CN102410894 A CN 102410894A CN 2011102188577 A CN2011102188577 A CN 2011102188577A CN 201110218857 A CN201110218857 A CN 201110218857A CN 102410894 A CN102410894 A CN 102410894A
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Abstract
The invention discloses an interface pressure distribution testing sensing element. The interface pressure distribution testing sensing element comprises a sensing film, electrodes uniformly arranged around the sensing film at intervals, a lead connected with the electrodes and an upper and lower insulating paint layer. The sensing film is made from a conductive polymer composite material provided with a piezo-resistive sensitivity characteristic, and the electrodes and the lead are used for outputting resistivity information of the sensing film in different positions. When in testing, the lead is connected with a testing instrument, the electrical impedance imaging technology is used for acquiring, testing and computing so as to obtain the resistivity distribution of the sensing film in different positions, and then the pressure distribution can be obtained through the relationship between the sensing film pressure and the resistivity. The interface pressure distribution testing sensing element can be used for measuring the interface pressure distribution and change, and has the advantages of simple structure, ultra-thin film, strong flexibility, high resolution and precision, large measuring range and low cost.
Description
Technical field
The present invention relates to a kind of test sensing element, especially a kind of interfacial pressure distribution tests sensing element.
Background technology
In rock-soil mechanics and engineering foundation research field, all need carry out the measurement of interfacial stress (pressure) physical quantity in test in situ and the indoor model test.In-situ test mainly comprises the interfacial pressure of rock mass in-situ stress, underground engineering structure (like the vertical borehole wall, roadway support, tunnel-liner) internal force, prop and country rock etc.; The model test test mainly comprises rock soil mass pressure, prop pressure etc.Traditional interface pressure measures main flat jack, string wire pressure cell, the resistance-strain type pressure cell etc. of adopting, and two types of sensors only have the single-spot testing function mostly.
The practice of test of long duration Research And Engineering shows that two key issues below the pressure transducer ubiquity that adopts at present: (1) single-sensor generally can only record single-point information, can't obtain a measure feature; (2) existing testing sensor can't measure the interfacial pressure distribution and change.Therefore, the existing sensing technology measurement of incompatibility ground/structural interface pressure distribution.
Summary of the invention
Technical matters: the objective of the invention is for overcoming the deficiency of prior art, a kind of simple in structure, the interfacial pressure distribution tests sensing element that can test multiple spot information is provided.
Technical scheme: interfacial pressure distribution tests sensing element of the present invention; Comprise sense film; Be evenly distributed with some electrodes that are connected with lead around the sense film, be coated with the insulation enamelled coating of insulated enclosure in sense film upper and lower surfaces and electrode junction respectively.
Described sense film is made by conductive polymer composite; Described conductive polymer composite is carbon black or carbon nano-tube filled rubber-base composite material.
Beneficial effect: the sense film that is made by conductive polymer composite, evenly the electrode of separation around sense film, the lead that is connected with electrode reach the insulation course that sprays up and down.The conductive polymer composite matrix is selected rubber for use, and employed conductive phase can be conductive black, CNT or carbon nano-fiber etc.The sense film of being made by conductive polymer composite has the pressure drag characteristic; When ambient pressure acts on the sense film, its resistivity will change, and pressure varies in size; The variation of resistivity is also different, just can judge the size of ambient pressure through the size of test resistance rate.The change in resistance information that electrode of arranging all around and lead are used for measuring sense film.The effect of insulation course is to prevent the electrical property influence of extraneous contactant to sense film, plays insulation, sealing and protective effect.When sensing element uses; Lead is connected with testing tool; When the external force of different sizes acts on diverse location place, sensing element plane, the resistivity of sense film relevant position will produce different variations, just can be through having the calculating that disclosed electrical impedance imaging technology is carried out collecting test and is correlated with this variation in the document; Obtain the size of the change in resistance of position, obtain rock soil medium/structural interface pressure distribution with anti-release position external force.Utilization has the conductive polymer composite of piezoresistance sensitivity characteristic and makes sense film, and electrode and lead are used to export sense film diverse location place resistivity information.During test; Lead is connected with testing tool; Utilize the electrical impedance imaging technology to carry out collecting test and calculating, obtain the resistivity distribution at sense film diverse location place, obtain the pressure size distribution through the relation between sense film pressure size and the resistivity size again.Can realize measurement that interfacial pressure is distributed and changes, and have simple in structure, ultra-thin, compliance strong, resolution reaches the low characteristics of cost greatly with precision height, range.Major advantage has:
1, the sense film that uses of sensing element has that structure is thin, the quick precision of power is high, wide range and low characteristics of cost;
2, sense film can be realized higher compliance, can be attached to the measurement of carrying out pressure distribution between the interface of arbitrary shape;
3, can realize higher resolution through the electrode that gathers, in theory, the electrode that circumferentially-spaced is arranged is many more, and the precision and the resolution that go out through the electrical impedance imaging technique computes are high more;
4, can realize other measurement of large tracts of land interfacial pressure branch.In theory, the area of sensing element can be made any size as required, realizes the measurement of large tracts of land pressure distribution.
Description of drawings
Fig. 1 is the planar structure synoptic diagram of sensing element embodiment 1 of the present invention.
Fig. 2 is the planar structure synoptic diagram of sensing element embodiment 2 of the present invention.
Fig. 3 is the A-A sectional view of Fig. 1 and Fig. 2.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are done further to describe:
Embodiment 2, shown in Figure 3 like Fig. 2; Interfacial pressure distribution tests sensing element is circular; It comprises sense film 1, evenly separation all is connected with lead 3 on the electrode 2 around the sense film 1, electrode 2, sprays the insulation enamelled coating 4 of one deck insulated enclosure respectively in sense film upper and lower surfaces and electrode junction.Sense film 1 uses carbon nano-tube filled rubber-based conducing composite material to be made; Thickness is 100 μ m; Sense film 1 be shaped as the circle that diameter is 150mm, 16 even separation of electrode are in circumference, the copper sheet that electrodes use 0.1mm is thick; Be of a size of 5mm * 5mm, be connected with lead on each electrode.Electrode and sense film use conductive adhesive, lead and electrode welding.
The shape of sense film 1 can be decided according to the test needs, can be rectangle, circle or other special shapes; Electrode 2 quantity are decided according to measuring accuracy, and the high more number of electrodes of arranging of measuring accuracy is just many more.
Claims (3)
1. interfacial pressure distribution tests sensing element; It is characterized in that: sensing element comprises sense film (1); Be evenly distributed with some electrodes (2) that are connected with lead (3) around the sense film (1), be coated with the insulation enamelled coating (4) of insulated enclosure in sense film (1) upper and lower surfaces and electrode (2) junction respectively.
2. interfacial pressure distribution tests sensing element according to claim 1 is characterized in that: described sense film (1) is made by conductive polymer composite.
3. interfacial pressure distribution tests sensing element according to claim 2 is characterized in that: described conductive polymer composite is carbon black or carbon nano-tube filled rubber-base composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102188577A CN102410894A (en) | 2011-08-02 | 2011-08-02 | Interface pressure distribution testing sensing element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102188577A CN102410894A (en) | 2011-08-02 | 2011-08-02 | Interface pressure distribution testing sensing element |
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| CN102410894A true CN102410894A (en) | 2012-04-11 |
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| CN2011102188577A Pending CN102410894A (en) | 2011-08-02 | 2011-08-02 | Interface pressure distribution testing sensing element |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267597A (en) * | 2013-01-09 | 2013-08-28 | 中国科学院电工研究所 | Piezoresistive-material-based resistivity imaging flexible pressure detection system and detection method |
| CN106291111A (en) * | 2016-08-12 | 2017-01-04 | 深圳市拓普微科技开发有限公司 | A kind of conductive adhesive tape tester |
| CN106768518A (en) * | 2016-12-09 | 2017-05-31 | 中国科学院合肥物质科学研究院 | Flexible pressure-sensitive sensor based on EIT technologies |
| CN107209071A (en) * | 2014-09-17 | 2017-09-26 | 森斯埃布尔科技有限责任公司 | Sensing system comprising sensing structure |
| CN108955966A (en) * | 2017-05-19 | 2018-12-07 | 冲击力科技实验室股份公司 | Sensor mat |
| CN109781151A (en) * | 2019-01-22 | 2019-05-21 | 苏州大学 | The sensor and its preparation of sensing element and elastic sensing element process integration |
| CN112710415A (en) * | 2020-12-01 | 2021-04-27 | 南京理工大学 | High-precision planar piezoresistive sensor system and application method thereof |
| CN112924059A (en) * | 2021-01-26 | 2021-06-08 | 上海同岩土木工程科技股份有限公司 | Strip-type surrounding rock pressure monitoring device, monitoring method and installation method |
| CN113008418A (en) * | 2021-02-26 | 2021-06-22 | 福州大学 | Flexible tactile sensor of pressure drag type |
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| JPH1038720A (en) * | 1996-07-19 | 1998-02-13 | Nippon Telegr & Teleph Corp <Ntt> | Large area pressure distribution sensor |
| US5799533A (en) * | 1995-05-12 | 1998-09-01 | Director-General Of Agency Of Industrial Science And Technology | Distributed pressure sensor and method for manufacturing the same |
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Patent Citations (5)
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| US5799533A (en) * | 1995-05-12 | 1998-09-01 | Director-General Of Agency Of Industrial Science And Technology | Distributed pressure sensor and method for manufacturing the same |
| JPH1038720A (en) * | 1996-07-19 | 1998-02-13 | Nippon Telegr & Teleph Corp <Ntt> | Large area pressure distribution sensor |
| CN101258389A (en) * | 2005-09-05 | 2008-09-03 | Ew系统有限公司 | Touch feeling sensor and touch feeling sensor application apparatus |
| CN101201277A (en) * | 2007-11-23 | 2008-06-18 | 清华大学 | Array type ultra-thin submissive force sensor and preparation method thereof |
| CN102012287A (en) * | 2010-09-29 | 2011-04-13 | 东南大学 | Electrical pressure sensor of circular silicon film microcomputer |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267597A (en) * | 2013-01-09 | 2013-08-28 | 中国科学院电工研究所 | Piezoresistive-material-based resistivity imaging flexible pressure detection system and detection method |
| CN103267597B (en) * | 2013-01-09 | 2015-04-08 | 中国科学院电工研究所 | Piezoresistive-material-based resistivity imaging flexible pressure detection system and detection method |
| CN107209071A (en) * | 2014-09-17 | 2017-09-26 | 森斯埃布尔科技有限责任公司 | Sensing system comprising sensing structure |
| CN106291111A (en) * | 2016-08-12 | 2017-01-04 | 深圳市拓普微科技开发有限公司 | A kind of conductive adhesive tape tester |
| CN106768518A (en) * | 2016-12-09 | 2017-05-31 | 中国科学院合肥物质科学研究院 | Flexible pressure-sensitive sensor based on EIT technologies |
| CN108955966A (en) * | 2017-05-19 | 2018-12-07 | 冲击力科技实验室股份公司 | Sensor mat |
| CN109781151A (en) * | 2019-01-22 | 2019-05-21 | 苏州大学 | The sensor and its preparation of sensing element and elastic sensing element process integration |
| CN112710415A (en) * | 2020-12-01 | 2021-04-27 | 南京理工大学 | High-precision planar piezoresistive sensor system and application method thereof |
| CN112924059A (en) * | 2021-01-26 | 2021-06-08 | 上海同岩土木工程科技股份有限公司 | Strip-type surrounding rock pressure monitoring device, monitoring method and installation method |
| CN112924059B (en) * | 2021-01-26 | 2022-09-23 | 上海同岩土木工程科技股份有限公司 | Strip-type surrounding rock pressure monitoring device, monitoring method and installation method |
| CN113008418A (en) * | 2021-02-26 | 2021-06-22 | 福州大学 | Flexible tactile sensor of pressure drag type |
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Application publication date: 20120411 |