CN101710007B - Concrete wall body expansion internal stress measuring sensor and measuring method - Google Patents
Concrete wall body expansion internal stress measuring sensor and measuring method Download PDFInfo
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- CN101710007B CN101710007B CN2009102322441A CN200910232244A CN101710007B CN 101710007 B CN101710007 B CN 101710007B CN 2009102322441 A CN2009102322441 A CN 2009102322441A CN 200910232244 A CN200910232244 A CN 200910232244A CN 101710007 B CN101710007 B CN 101710007B
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 65
- 230000003321 amplification Effects 0.000 claims abstract description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 4
- 230000008961 swelling Effects 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000005536 corrosion prevention Methods 0.000 abstract 1
- 238000005070 sampling Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
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Abstract
The invention relates to a concrete wall body expansion internal stress measuring sensor and a measuring method, wherein the sensor comprises a stabilizing block, a stabilizing block with a wire outlet, an elastic body, a strain beam, a foil-type metal strain gauge, a strain gauge lead, a metal fixed block, a signal processing board, a corrugated pipe and an output cable. The measuring method comprises the following steps of: pre-burying the sensor into concrete, acting the expansion internal stress of the concrete onto the strain beam part in the metal elastic body, and driving the deformation of the foil-type metal strain gauge through the deformation of the strain beam, so that the resistance value of the foil-type metal strain gauge is changed; forming a bridge from the foil-type metal strain gauge, applying a power supply to the bridge to generate electrical signals, obtaining the signals with the current of 4-20mA through amplification and voltage conversion, and transmitting the signals to a control sampling chamber through the output cable. The elastic body is formed through integral processing, and the elastic body and the stabilizing blocks are in welded structures. The output cable adopts the protection of the metal corrugated pipe, and the sensor is integrally sealed; the concrete wall body expansion internal stress measuring sensor has good stability, small size, light weight, pressure resistance, corrosion prevention, strong load resisting capability, high precision and small error.
Description
Technical field
What the present invention relates to is a kind of concrete wall, reservoir concrete dam and concrete pier under the influence of variation of ambient temperature and be subjected under the effect of external force, the swelling internal stress survey sensor and the measuring method that produce, measuring media is the concrete that solidifies, sensor is counted the detection sensing unit with paper tinsel formula metal strain, belongs to the concrete wall body expansion internal stress measuring sensor technical field.
Background technology
The kind of current ergometry sensor is a lot, main typical LOAD CELLS, pull pressure sensor, under the influence of variation of ambient temperature and be subjected under the effect of external force, the swelling internal stress measurement of generation has certain defective for concrete wall, reservoir concrete dam and concrete pier; Because the concrete internal stress of solidifying is the whole stress that produces, can't concentrate to act on certain any power, internal stress is the inner power that produces, and is not outside acting force.
Summary of the invention
What the present invention proposed is a kind of concrete wall body expansion internal stress measuring sensor and measuring method, its purpose is intended to overcome the existing in prior technology defective, utilize the characteristics of metallic spring strain, count the detection sensing unit with paper tinsel formula metal strain, make a kind of flexible member of measuring internal stress; Can be embedded in the inside of concrete wall, reservoir concrete dam and concrete pier, measurement is under the influence of variation of ambient temperature and be subjected under the effect of external force, the swelling internal stress that produces, and will measure acquired signal and spread out of, adopt the mode of monitoring in real time, the internal stress of concrete wall, reservoir concrete dam and concrete pier is detected.
Technical solution of the present invention: the structure that it is characterized in that sensor comprises that first stablizes piece and be with wire hole to stablize piece, elastic body, A strain beam and B strain beam, A paper tinsel formula metal strain meter and B paper tinsel formula metal strain meter, A strainometer lead-in wire and B strainometer lead-in wire, the metal fixed block, signal-processing board, screw, clamp nut, corrugated tube, output cable, wherein A strain beam and B strain beam integral body on elastic body machine, A paper tinsel formula metal strain meter and B paper tinsel formula metal strain meter stick on A strain beam and the B strain beam, the metal fixed block is welded on elastomeric inside, signal-processing board is installed on the metal fixed block by screw, A paper tinsel formula metal strain meter and B paper tinsel formula metal strain meter are connected on the signal-processing board by A strainometer lead-in wire and B strainometer lead-in wire, signal-processing board links to each other with output cable, elastic body and first is stablized piece and is with wire hole to stablize piece in aggregates by the welding position, output cable is stablized piece from the band wire hole and is drawn, clamp nut and corrugated tube weld together, and the clamp nut that is welded with corrugated tube is enclosed within on the output cable and with the band wire hole stablizes piece by being threaded and the fit sealing output cable.
Measuring method is that sensor is embedded in concrete in advance, treat to measure after the complete concrete setting, the concrete swelling internal stress acts on A strain beam and the B strain beam position in the metallic elastic body during measurement, A strain beam and B strain beam generation microdeformation, because A paper tinsel formula metal strain meter and B paper tinsel formula metal strain meter stick on A strain beam and B strain beam position in the elastic body, the deformation of A strain beam and B strain beam drives the deformation of A paper tinsel formula metal strain meter and B paper tinsel formula metal strain meter, A paper tinsel formula metal strain meter and B paper tinsel formula metal strain meter resistance and change; A paper tinsel formula metal strain meter and B paper tinsel formula metal strain meter are formed electric bridge, apply power supply for this electric bridge and produce electric signal; The electric signal that electric bridge is produced is transferred on the signal-processing board, and electric signal is amplified the amplification circuit of electrical signal on signal-processing board and voltage transitions becomes electric current 4～20mA signal; 4～20mA current signal is transferred to the control sampler chamber through output cable.
Advantage of the present invention: elastic body is that integral body processes, and elastic body and stable piece are welded structures, whole anti-load.Output cable adopts wavy metal protection of pipe, sensor integral sealing; This sensor has that stability is good, volume is little, in light weight, the close structure of all-metal, withstand voltage etch-proof characteristics; Anti-load-carrying ability is strong, synthesis precision height, advantage such as error is little.
Description of drawings
Accompanying drawing 1 is the structural representation of concrete wall body expansion internal stress measuring sensor.
Accompanying drawing 2 is side views of Fig. 1,
Accompanying drawing 3 is strain bridge circuit diagrams.
Accompanying drawing 4 is signal processing circuit 4～20mA output circuit block diagrams.
Among the figure 1 stablizes piece, the 2nd, elastic body, the 3rd, and the band wire hole is stablized piece, the 4th, clamp nut, the 5th, corrugated tube, the 6th, output cable, the 7th, stable hole, the 8th, welding position, the 9th, A strain beam, the 10th, A paper tinsel formula metal strain meter, the 11st, A strainometer lead-in wire, the 12nd, signal-processing board, the 13rd, metal fixed block, the 14th, B strain beam, the 15th, B paper tinsel formula metal strain meter, the 16th, B strainometer lead-in wire, the 17th, screw.
Embodiment
Contrast accompanying drawing 1,2, its structure comprise to be stablized piece 1 and is with wire hole to stablize piece 3, elastic body 2, strain beam 9 and B strain beam 14, A paper tinsel formula metal strain meter 10 and B paper tinsel formula metal strain meter 15, A strainometer lead-in wire 11 and B strainometer lead-in wire 16, metal fixed block 13, signal-processing board 12, screw 17, clamp nut 4, corrugated tube 5, output cable 6.Wherein A strain beam 9 and B strain beam 14 integral body on elastic body 2 machines, A paper tinsel formula metal strain meter 10 and B paper tinsel formula metal strain meter 15 stick on strain beam 9 and the B strain beam 14, metal fixed block 13 is welded on the inside of elastic body 2, signal-processing board 12 is installed on the metal fixed block 13 by screw 17, A paper tinsel formula metal strain meter 10 and B paper tinsel formula metal strain meter 15 are connected on the signal-processing board 12 by A strainometer lead-in wire 11 and B strainometer lead-in wire 16, signal-processing board 12 links to each other with output cable 6, it is in aggregates by welding position 8 that elastic body 2 and stable piece 1 and band wire hole are stablized piece 3, output cable 6 is stablized piece 3 from the band wire hole and is drawn, clamp nut 4 and corrugated tube 5 weld together, and the clamp nut 4 that is welded with corrugated tube 5 is enclosed within on the output cable 6 and and has wire hole and stablize piece 3 by the also fit sealing output cable 6 that is threaded.
During use sensor is embedded in concrete in advance, treat to measure after the complete concrete setting, the concrete swelling internal stress acts on A strain beam 9 and B strain beam 14 positions in the metallic elastic body 2 during measurement, microdeformation takes place in A strain beam 9 and B strain beam 14, because A paper tinsel formula metal strain meter 10 and B paper tinsel formula metal strain meter 15 stick on A strain beam 9 and B strain beam 14 positions in the elastic body 2, the deformation of A strain beam 9 and B strain beam 14 drives the deformation of A paper tinsel formula metal strain meter 10 and B paper tinsel formula metal strain meter 15, A paper tinsel formula metal strain meter 10 and B paper tinsel formula metal strain meter 15 resistances and change; A paper tinsel formula metal strain meter 10 and B paper tinsel formula metal strain meter 15 are formed electric bridge, apply power supply to electric bridge and produce electric signal; The electric signal that electric bridge is produced is transferred on the signal-processing board 12, and electric signal is amplified the amplification circuit of electrical signal on signal-processing board 12 and voltage transitions becomes electric current 4～20mA signal; 4～20mA current signal is transferred to the control sampler chamber through output cable 6.
Contrast accompanying drawing 3, resistance R 1, resistance R 2, resistance R 3, resistance R 4 are 4 strain resistors of electric bridge, and resistance R 1 and resistance R 3 pressurized resistances reduce, and resistance R 2 and resistance R 4 tension resistances increase; Vin+, Vin-are the input ends of electric bridge power supply, and Vout+, Vout are the output terminals of electric bridge signal.
Contrast accompanying drawing 4 is made up of prior art mu balanced circuit, strain bridge, voltage amplifier circuit and V/I change-over circuit, and mu balanced circuit power supply to external world carries out the secondary voltage stabilizing and offers strain bridge and voltage amplifier circuit again; Voltage amplifier circuit carries out processing and amplifying with the signal of strain bridge; The V/I change-over circuit converts voltage signal to constant current signal.
Electric signal disposable plates 12 principle of work are that Voltage stabilizing module will be imported power supply and carry out the secondary voltage stabilizing, and amplifying circuit is amplified to the volt magnitude voltage signals with the millivolt level signal of electric bridge output, and the V/I change-over circuit is converted to voltage signal 4～20mA current signal of standard.
Claims (2)
1. concrete wall body expansion internal stress measuring sensor, the structure that it is characterized in that sensor comprises that first stablizes piece and be with wire hole to stablize piece, elastic body, A strain beam and B strain beam, A paper tinsel formula metal strain meter and B paper tinsel formula metal strain meter, A strainometer lead-in wire and B strainometer lead-in wire, the metal fixed block, signal-processing board, screw, clamp nut, corrugated tube, output cable, wherein A strain beam and B strain beam integral body on elastic body machine, A paper tinsel formula metal strain meter and B paper tinsel formula metal strain meter stick on A strain beam and the B strain beam, the metal fixed block is welded on elastomeric inside, signal-processing board is installed on the metal fixed block by screw, A paper tinsel formula metal strain meter and B paper tinsel formula metal strain meter are connected on the signal-processing board by A strainometer lead-in wire and B strainometer lead-in wire, signal-processing board links to each other with output cable, elastic body and first is stablized piece and is with wire hole to stablize piece in aggregates by the welding position, output cable is stablized piece from the band wire hole and is drawn, clamp nut and corrugated tube weld together, and the clamp nut that is welded with corrugated tube is enclosed within on the output cable and with the band wire hole stablizes piece by being threaded and the fit sealing output cable.
2. measure the method for concrete wall body expansion internal stress according to the internal stress measuring sensor of claim 1, it is characterized in that sensor is embedded in concrete in advance, treat to measure after the complete concrete setting, the concrete swelling internal stress acts on A strain beam and the B strain beam position in the metallic elastic body during measurement, A strain beam and B strain beam generation microdeformation, because A paper tinsel formula metal strain meter and B paper tinsel formula metal strain meter stick on A strain beam and B strain beam position in the elastic body, the deformation of A strain beam and B strain beam drives the deformation of A paper tinsel formula metal strain meter and B paper tinsel formula metal strain meter, A paper tinsel formula metal strain meter and B paper tinsel formula metal strain meter resistance and change; A paper tinsel formula metal strain meter and B paper tinsel formula metal strain meter are formed electric bridge, apply power supply for this electric bridge and produce electric signal; The electric signal that electric bridge is produced is transferred on the signal-processing board, and electric signal is amplified the amplification circuit of electrical signal on signal-processing board and voltage transitions becomes electric current 4～20mA signal; 4～20mA current signal is transferred to the control sampler chamber through output cable.
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| CN2009102322441A CN101710007B (en) | 2009-12-10 | 2009-12-10 | Concrete wall body expansion internal stress measuring sensor and measuring method |
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| CN2009102322441A CN101710007B (en) | 2009-12-10 | 2009-12-10 | Concrete wall body expansion internal stress measuring sensor and measuring method |
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| CN101710007A CN101710007A (en) | 2010-05-19 |
| CN101710007B true CN101710007B (en) | 2011-03-16 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393449B (en) * | 2011-10-27 | 2014-01-15 | 上海交通大学 | Real-time monitoring method and device used for concrete structure |
| CN103105249A (en) * | 2013-01-22 | 2013-05-15 | 沈阳建筑大学 | Monitoring method of cast-in-situ prestressed concrete members and tensile stress of prestressed steels |
| CN105674942A (en) * | 2016-01-04 | 2016-06-15 | 西南交通大学 | Concrete strainmeter subassembly and installation method |
| CN106771102A (en) * | 2017-01-25 | 2017-05-31 | 厦门理工学院 | The measuring system and measuring method of Non-load Concrete internal stress in concrete structure |
| CN107728499A (en) * | 2017-11-18 | 2018-02-23 | 衡阳县海得利网络技术有限公司 | Presetting system intelligent detection device and building member |
| CN108709492A (en) * | 2018-08-24 | 2018-10-26 | 霍丁格包尔文(苏州)电子测量技术有限公司 | A kind of hermetically sealed strain gauge transducer |
| CN110006329A (en) * | 2019-04-17 | 2019-07-12 | 长江空间信息技术工程有限公司(武汉) | The unstressed meter test device of waterproof and installation method inside large volume low-heat concrete |
| CN111351602B (en) * | 2020-02-14 | 2022-05-24 | 广东省建筑科学研究院集团股份有限公司 | Method for measuring micro-expansion stress of cement-based material |
| CN114754666B (en) * | 2022-03-29 | 2022-12-02 | 清华大学 | Concrete dam alkali aggregate reaction deformation monitoring equipment and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0239563A1 (en) * | 1986-03-20 | 1987-09-30 | Hackl, Erich, Dipl.-Ing. | Measurement transducer |
| CN2929716Y (en) * | 2006-05-12 | 2007-08-01 | 郑万山 | Real stress detector for self compensation concrete structure |
| CN101149302A (en) * | 2007-11-06 | 2008-03-26 | 哈尔滨工业大学 | Sensor for monitoring/measuring stress/ strain |
-
2009
- 2009-12-10 CN CN2009102322441A patent/CN101710007B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0239563A1 (en) * | 1986-03-20 | 1987-09-30 | Hackl, Erich, Dipl.-Ing. | Measurement transducer |
| CN2929716Y (en) * | 2006-05-12 | 2007-08-01 | 郑万山 | Real stress detector for self compensation concrete structure |
| CN101149302A (en) * | 2007-11-06 | 2008-03-26 | 哈尔滨工业大学 | Sensor for monitoring/measuring stress/ strain |
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