CN202024932U - Strain gage integration device used under triaxial fluid confining pressure function - Google Patents
Strain gage integration device used under triaxial fluid confining pressure function Download PDFInfo
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- CN202024932U CN202024932U CN2011200352623U CN201120035262U CN202024932U CN 202024932 U CN202024932 U CN 202024932U CN 2011200352623 U CN2011200352623 U CN 2011200352623U CN 201120035262 U CN201120035262 U CN 201120035262U CN 202024932 U CN202024932 U CN 202024932U
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- strain gage
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- 230000010354 integration Effects 0.000 title abstract 6
- 239000012530 fluid Substances 0.000 title abstract 5
- 239000002184 metal Substances 0.000 claims abstract description 24
- 230000000694 effects Effects 0.000 claims abstract description 17
- 239000011888 foil Substances 0.000 claims description 13
- 229920001971 elastomer Polymers 0.000 claims description 5
- 239000005060 rubber Substances 0.000 claims description 5
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 description 24
- 239000011435 rock Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
A strain gage integration device used under a triaxial fluid confining pressure function comprises a metal tube body; a triaxial confining pressured sample is arranged in the metal tube body; a plurality of resistance strain gages which are attached at different positions are arranged on the sample; the plurality of resistance strain gages are collected and connected on a thin-sheet lead by leads, the thin-sheet lead is extended out of the metal tube body by a leading-out element on the wall of the metal tube body; one end of the thin-sheet lead extended out of the tube body is connected with an integration bridge circuit plate which can collect stress and strain data of the sample in real time under the triaxial fluid confining pressure function by a plug-in card; and an output signal of each resistance strain gage in the thin-sheet lead can be connected with a bridge circuit in the integration bridge circuit plate so as to form a bridge loop of the resistance strain gage. The strain gage integration device can realize integration output measurement on the plurality of resistance strain gages on the sample under the triaxial fluid confining pressure function, thus providing a new way for measuring sample deformation under the triaxial fluid confining pressure function; and the device is simple in structure, convenient for use, high in measurement accuracy and good in effect.
Description
Technical field
The utility model relates to a kind of foil gauge and measures anamorphic attachment for cinemascope, especially a kind of foil gauge integrating device that is applicable under the three axial flow body confined pressure effects.
Background technology
The rock overwhelming majority of occurring in nature is in the three-dimensional compressive state.In addition, owing to the high resistance to compression of rock, low tensile characteristics, people also usually manage to make rock be in the three-dimensional compressive state and do one's utmost to avoid to occur tension in rock in the real work.Therefore study intensity, deformation characteristic and the stress-strain relation of rock under the three-dimensional compressive state, for Geotechnical Engineering design and calculating, the research of failure mechanism of rock all has important meaning.Triaxial compression test means that sample is in
,
With
Three directions of coordinate system are stressed.It is divided into ordinary triaxial test and true triaxial test usually.Ordinary triaxial test refers to that test specimen is subjected to stress
,
With
Effect, interim have two to equate, as
, or
True three is that each is unequal for three stress.
Cylindric sample is adopted in the normal triaxial deformation test, usually a certain direction finding confined pressure stress (
) act on down, gradually test specimen is applied axle pressure, till the test specimen pressure break.Carry out ordinary triaxial test except that using press, need the equipment of triaxial cell and loading pressure measurement.The side direction loading equipemtn is pressed into the triaxial cell by oil-in with liquid and makes confined pressure, and bearing plate loads axle pressure.Load mode applies xial feed and confined pressure at first simultaneously, makes both approximately equals, and when reaching regulation confined pressure value, it is constant to keep confined pressure, and axle pressure continues continuous loading again, and loading velocity requires same uniaxial compressive strength test.
The physical quantity of normal triaxial collection has: the distortion (strain) of the confined pressure of test power (stress), test specimen and test specimen.The test power (stress), the confined pressure of test specimen and the physical quantitys such as distortion of test specimen that adopt resistance strain type pressure sensor and resistance strain sensor to record are converted into voltage signal, utilize the amplifier of band filter function that voltage signal is imported computer through A/D converter again, thereby obtain acquisition and recording the test specimen physical quantity.Can draw stress-strain curves according to above-mentioned recording materials.
The state of distortion reflection sample is the main control parameters of normal triaxial deformation test.Conventional method is to adopt displacement transducer to carry out the measurement of sample deformation, when still adopting the displacement sensor sample deformation, is difficult to eliminate the influence of sample outer wall sleeve to test result, and the test result relative error is bigger simultaneously, and measuring accuracy is not high.Therefore adopt the directly distortion of test sample on the ordinary triaxial test instrument of resistance strain gage, and avoid that the metal cylinder internal liquid penetrates into a new research direction that becomes ordinary triaxial test in the sample by lead when the resistance strain gage lead is derived.
Summary of the invention
Technical matters: the purpose of this utility model provide a kind of simple in structure, easy to operate, degree of accuracy is high is used for foil gauge integrating device under the three axial flow body confined pressure effects.
Technical scheme: the foil gauge integrating device that is used under the three axial flow body confined pressure effects of the present utility model, comprise metal cylinder, be provided with the sample that is subjected to three confined pressures in the metal cylinder, described sample is provided with a plurality of resistance strain gages that are affixed on diverse location, a plurality of resistance strain gages compile through lead and are connected on the thin slice lead, the export element of thin slice lead on being located at the metal cylinder body wall stretches out outside the cylindrical shell, stretch out outer thin slice lead one end of cylindrical shell is connected with real-time collection sample stress-strain data under three confined pressure effects through plug-in card integrated bridge circuit plate, each resistance strain gage output signal links to each other with a bridge circuit in the integrated bridge circuit plate respectively in the thin slice lead, forms the bridge circuit of a resistance strain gage.
Described a plurality of resistance strain gage is 4～8; It is described that to compile the lead symmetry that is connected on the thin slice lead in parallel; Described export element by be inverted open circles tapered sleeve, symmetry is located at two semicylinder block rubbers clamping the thin slice lead in the open circles tapered sleeve and constitutes; Described integrated bridge circuit plate comprises the slot that matches with plug-in card, is integrated in the many groups bridge circuit on the bridge circuit plate, the many groups positive and negative electrode resistance strain gage signal output port that links to each other with many groups bridge circuit, organizes more and is connected with power input mouth and output port of power source on the bridge circuit.
Beneficial effect: owing to adopted technique scheme, can be implemented in the deflection of directly measuring sample under three band confined pressure conditions with resistance strain gage, be integrated on the power circuit by the lead of thin slice lead resistance strain gages all on the sample, by an export element, the derivation of thin slice electric wire is connected on the integrated bridge circuit plate, the resistance strain gage signal is exported in real time and gathered by integrated bridge circuit plate.Realized under the three axial flow body confined pressure effects to sample on the integrated output of a plurality of resistance strain gages and a plurality of angle resistance strain gage signals measure, avoided the metal cylinder internal liquid to be penetrated on the sample by the lead-in wire of resistance strain gage, measure sample deformation down for three axial flow body confined pressure effects a kind of new method is provided, it is simple in structure, easy to operate, the measuring accuracy height, effective, have practicality widely.
Description of drawings
Fig. 1 is resistance strain gage integrating device figure of the present utility model.
Fig. 2 is the integrated structural drawing of thin slice lead of the present utility model.
Fig. 3 is an export element structural drawing of the present utility model.
Fig. 4 is integrated bridge circuit plate structure figure of the present utility model.
Among the figure: 1-metal cylinder, 2-sample, 3-resistance strain gage, 4-lead, 5-thin slice lead, 6-export element, 7-integrated bridge circuit plate, 8-semicylinder block rubber, 9-plug-in card, 10-slot, 11-power input mouth, 12-output port of power source, 13-positive electrode resistance foil gauge signal output port, 14-negative pole resistance strain gage signal output port.
Embodiment
Below in conjunction with accompanying drawing enforcement of the present utility model is further described:
The foil gauge integrating device that is used under the three axial flow body confined pressure effects of the present utility model, comprise metal cylinder 1, be provided with the sample 2 that is subjected to three confined pressures in the metal cylinder 1, sample 2 is provided with a plurality of resistance strain gages 3 that are affixed on diverse location, a plurality of resistance strain gages 3 compile through lead 4 and are connected on the thin slice lead 5, and it is in parallel to compile lead 4 symmetries that are connected on the thin slice lead 5; The number of a plurality of resistance strain gages 3 is determined according to test is required, is generally 4～8.The export element 6 of thin slice lead 5 on being located at metal cylinder 1 wall stretches out outside the cylindrical shell, export element 6 by be inverted open circles tapered sleeve, symmetry is located at two semicylinder block rubbers 8 clamping thin slice lead 5 in the open circles tapered sleeve and constitutes; Stretch out outer thin slice lead 5 one ends of cylindrical shell are connected with real-time collection sample 2 stress-strain data under three confined pressure effects through plug-in card 9 integrated bridge circuit plate 7, each resistance strain gage 3 output signal links to each other with a bridge circuit in the integrated bridge circuit plate 7 respectively in the thin slice lead 5, form the bridge circuit of a resistance strain gage 3, in the bridge circuit of each resistance strain gage 3 of integrated bridge circuit plate 7, bridge circuit is full-bridge, half-bridge or 1/4 bridge circuit.Integrated bridge circuit plate 7 comprises the slot 10 that matches with plug-in card 9, is integrated in the many groups bridge circuit on the bridge circuit plate, the many groups positive and negative electrode resistance strain gage signal output port 13,14 that links to each other with many groups bridge circuit, organizes more and is connected with power input mouth 11 and output port of power source 12 on the bridge circuit.
Specific operation process: axially paste four resistance strain gages 3 along metal cylinder 1 inner sample 2 outer walls of placing common rock or coal, be used for measuring the axial strain of sample 2, paste three resistance strain gages 3, the hoop strain that is used for measuring sample 2 along sample 2 outer wall hoops; All resistance strain gages 34 are integrated on the thin slice lead 5 by conducting electricity, form a thin slice integrating device, thin slice lead 5 integrated all resistance strain gage leads 4 on a power circuit, all resistance strain gage 3 shared power circuits; Thin slice lead 5 is derived metal cylinder 1 by an export element 6 is set in metal cylinder 1 bottom, and export element 6 is inverted open circles tapered sleeve, and two semicylinder block rubbers 8 clamp thin slice lead 5, pass export element 6 holes; In metal cylinder 1 bottom hole, export element 6 passes the boring of metallic steel 1 tube bottom, by metal cylinder 1 internal liquid export element 6 is pressurizeed, both can reach sealing function, also thin slice lead 5 can be derived metal cylinder 1 simultaneously metal cylinder 1; The plug-in card 9 of the thin slice lead 5 of deriving by thin slice lead 5 ends inserts to be realized in the slot 10 of integrated bridge circuit plate 7 bottoms and being connected of integrated bridge circuit plate 7, each resistance strain gage 3 output signal in the thin slice lead 5 are connected with a bridge circuit in the circuit board 7 respectively, form the bridge circuit of a resistance strain gage 3; In each resistance-strain 3 bridge circuit of integrated bridge circuit plate 7,1/4th electric bridges are set; By hydraulic servo rock mechanics experiment device metal cylinder 1 closed test sample 2 is applied axial compression and confined pressure, at the power input mouth 11 and the output port of power source 12 port input supply voltages of integrated bridge circuit plate 7, export and gather at each resistance strain gage 3 signal of positive electrode resistance foil gauge signal output port 13 and 14 pairs of measurements of negative pole resistance strain gage signal output port.
Claims (5)
1. foil gauge integrating device that is used under the three axial flow body confined pressure effects, comprise metal cylinder (1), be provided with the sample (2) that is subjected to three confined pressures in the metal cylinder (1), it is characterized in that: described sample (2) is provided with a plurality of resistance strain gages (3) that are affixed on diverse location, a plurality of resistance strain gages (3) compile through lead (4) and are connected on the thin slice lead (5), the export element (6) of thin slice lead (5) on being located at metal cylinder (1) wall stretches out outside the cylindrical shell, stretch out outer thin slice lead (5) one ends of cylindrical shell are connected with real-time collection sample (2) stress-strain data under three confined pressure effects through plug-in card (9) integrated bridge circuit plate (7), each resistance strain gage (3) output signal links to each other with a bridge circuit in the integrated bridge circuit plate (7) respectively in the thin slice lead (5), forms the bridge circuit of a resistance strain gage (3).
2. the foil gauge integrating device that is used under the three axial flow body confined pressure effects according to claim 1, it is characterized in that: described a plurality of resistance strain gages (3) are 4～8.
3. the foil gauge integrating device that is used under the three axial flow body confined pressure effects according to claim 1 is characterized in that: described to compile lead (4) symmetry that is connected on the thin slice lead (5) in parallel.
4. the foil gauge integrating device that is used under the three axial flow body confined pressure effects according to claim 1 is characterized in that: described export element (6) is located at two semicylinder block rubbers (8) of clamping thin slice lead (5) in the open circles tapered sleeve and constitutes by being inverted open circles tapered sleeve, symmetry.
5. the foil gauge integrating device that is used under the three axial flow body confined pressure effects according to claim 1, it is characterized in that: described integrated bridge circuit plate (7) comprises the slot (10) that matches with plug-in card (9), is integrated in the many groups bridge circuit on the bridge circuit plate, the many groups positive and negative electrode resistance strain gage signal output port (13,14) that links to each other with many groups bridge circuit, organizes more and is connected with power input mouth (11) and output port of power source (12) on the bridge circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200352623U CN202024932U (en) | 2011-02-10 | 2011-02-10 | Strain gage integration device used under triaxial fluid confining pressure function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200352623U CN202024932U (en) | 2011-02-10 | 2011-02-10 | Strain gage integration device used under triaxial fluid confining pressure function |
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| CN202024932U true CN202024932U (en) | 2011-11-02 |
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| CN2011200352623U Expired - Fee Related CN202024932U (en) | 2011-02-10 | 2011-02-10 | Strain gage integration device used under triaxial fluid confining pressure function |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175139A (en) * | 2011-02-10 | 2011-09-07 | 中国矿业大学 | Strain gauge integration device under triaxial fluid ambient pressure |
| CN108426766A (en) * | 2018-01-04 | 2018-08-21 | 中国科学院武汉岩土力学研究所 | A kind of compacting of soil rock core and strain detection testing device and method |
| CN110017763A (en) * | 2019-04-25 | 2019-07-16 | 黄河水利委员会黄河水利科学研究院 | A kind of lateral deformation measuring system of cuboid sample |
| CN111879606A (en) * | 2020-09-15 | 2020-11-03 | 中南大学 | Large-size shale sample true triaxial loading hydraulic fracturing strain measurement device |
-
2011
- 2011-02-10 CN CN2011200352623U patent/CN202024932U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175139A (en) * | 2011-02-10 | 2011-09-07 | 中国矿业大学 | Strain gauge integration device under triaxial fluid ambient pressure |
| CN102175139B (en) * | 2011-02-10 | 2013-04-03 | 中国矿业大学 | Strain gauge integration device under triaxial fluid ambient pressure |
| CN108426766A (en) * | 2018-01-04 | 2018-08-21 | 中国科学院武汉岩土力学研究所 | A kind of compacting of soil rock core and strain detection testing device and method |
| CN110017763A (en) * | 2019-04-25 | 2019-07-16 | 黄河水利委员会黄河水利科学研究院 | A kind of lateral deformation measuring system of cuboid sample |
| CN110017763B (en) * | 2019-04-25 | 2021-04-09 | 黄河水利委员会黄河水利科学研究院 | Lateral deformation measurement system of cuboid sample |
| CN111879606A (en) * | 2020-09-15 | 2020-11-03 | 中南大学 | Large-size shale sample true triaxial loading hydraulic fracturing strain measurement device |
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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: 20111102 Termination date: 20130210 |