CN201569521U - Expansion internal stress measuring sensor for concrete wall body - Google Patents
Expansion internal stress measuring sensor for concrete wall body Download PDFInfo
- Publication number
- CN201569521U CN201569521U CN2009202841523U CN200920284152U CN201569521U CN 201569521 U CN201569521 U CN 201569521U CN 2009202841523 U CN2009202841523 U CN 2009202841523U CN 200920284152 U CN200920284152 U CN 200920284152U CN 201569521 U CN201569521 U CN 201569521U
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- metal
- strain
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- output cable
- elastic body
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Abstract
The utility model provides an expansion internal stress measuring sensor for a concrete wall body, which is characterized in that a stable block, a stable block with a wire outlet hole, an elastic body, strain beams, metal-foil strain gauges, strain gauge lead wires, a metal fixed block, a signal processing plate, a corrugated pipe, an output cable and the like are included; during measurement, the sensor is pre-embedded into concrete, the concrete expansion internal stress acts at the parts of the strain beams in the metal elastic body, the deformation of the strain beams drives the deformation of the metal-foil strain gauges, and the resistance value of the metal-foil strain gauges is changed; an electric bridge is composed of the metal-foil strain gauges and used for producing an electrical signal through being provided with a power supply; and the electrical signals are magnified, and a voltage signal is converted into a 4 to 20mA current signal, and the 4 to 20mA current signal is transmitted to a control sampling chamber through an output cable. The utility model has the advantages that the elastic body is integrally processed; the elastic body and the stable block adopt welded structures; the output cable is protected by adopting a metal bellows; the sensor is integrally sealed; the stability is good; the volume is small; the weight is light; the expansion internal stress measuring sensor is pressure-resistant and corrosion-proof; the anti-loading capability is strong; the precision is high; and the error is small.
Description
Technical field
The utility model relates to 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 of generation.Measuring media is the concrete that solidifies, and 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
The utility model proposes a kind of concrete wall body expansion internal stress measuring sensor, its purpose is intended to overcome the existing in prior technology defective, utilize the characteristics of metallic spring strain, count the detection sensing unit, make a kind of flexible member of measuring internal stress with paper tinsel formula metal strain; 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 utility model: the structure that it is characterized in that sensor comprises that stablizing piece stablizes piece with the band wire hole, 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, it is in aggregates by the welding position that elastic body and stable piece and band wire hole are stablized piece, 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 and has wire hole and stablize piece by the also fit sealing output cable that is threaded.
Advantage of the present utility model: 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 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 A 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 15 sticks on strain beam 9 and 14 positions in the elastic body 2, strain beam 9 and 14 deformation drive the deformation of 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 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 (1)
1. concrete wall body expansion internal stress measuring sensor, it is characterized in that comprising and stablize 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, it is in aggregates by the welding position that elastic body and stable piece and band wire hole are stablized piece, 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 and has wire hole and stablize piece by the also fit sealing output cable that is threaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202841523U CN201569521U (en) | 2009-12-10 | 2009-12-10 | Expansion internal stress measuring sensor for concrete wall body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202841523U CN201569521U (en) | 2009-12-10 | 2009-12-10 | Expansion internal stress measuring sensor for concrete wall body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201569521U true CN201569521U (en) | 2010-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202841523U Expired - Lifetime CN201569521U (en) | 2009-12-10 | 2009-12-10 | Expansion internal stress measuring sensor for concrete wall body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201569521U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393449A (en) * | 2011-10-27 | 2012-03-28 | 上海交通大学 | Real-time monitoring method and device used for concrete structure |
| CN111351602A (en) * | 2020-02-14 | 2020-06-30 | 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 |
-
2009
- 2009-12-10 CN CN2009202841523U patent/CN201569521U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393449A (en) * | 2011-10-27 | 2012-03-28 | 上海交通大学 | Real-time monitoring method and device used for concrete structure |
| CN102393449B (en) * | 2011-10-27 | 2014-01-15 | 上海交通大学 | Real-time monitoring method and device used for concrete structure |
| CN111351602A (en) * | 2020-02-14 | 2020-06-30 | 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 |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100901 Effective date of abandoning: 20091210 |