CN205014938U - Adhere to formula relative displacement sensor - Google Patents
Adhere to formula relative displacement sensor Download PDFInfo
- Publication number
- CN205014938U CN205014938U CN201520611140.2U CN201520611140U CN205014938U CN 205014938 U CN205014938 U CN 205014938U CN 201520611140 U CN201520611140 U CN 201520611140U CN 205014938 U CN205014938 U CN 205014938U
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- CN
- China
- Prior art keywords
- bearing
- connecting rod
- speed steel
- steel sheet
- relative displacement
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Abstract
The utility model discloses an adhere to formula relative displacement sensor in civil engineering test device field, this sensor include first support, second support, connecting rod and high -speed steel piece, the connecting rod is installed at second support top, the axis of connecting rod axis perpendicular to second support, the one end of high -speed steel piece is located first support, the installing on the connecting rod of other end slidable and locking, the high -speed steel piece all is equipped with resistance strain gauge on the two sides that is close to first support one end, and the last wire that is equipped with of resistance strain gauge links to each other with data acquisition instrument. The beneficial effects of the utility model are that: simple structure, small, collection displacement measurement is as an organic whole with the erection support, installation convenient to use, the characteristics such as highly sensitive nature of utilizing the high -speed steel piece not have plastic deformation and resistance strain gauge are carried out the displacement and are detected, and the principle is simple, the linearity is good, sensitivity is high, satisfies general structural test's requirement, is particularly suitable for the measurement of small -size structure surface point -to -point transmission displacement.
Description
Technical field
The utility model relates to civil engineering work experiment detection device field, especially a kind of electronic sensor for the relative displacement of small scale structures surface measurement point-to-point transmission.
Background technology
Civil engineering structure comprises: building structure, bridge structure, underground structure, hydro-structure, tunnel structure and all kinds of unique construction thereof.The assembly that these engineering structures are interconnected for dissimilar supporting member that main body is formed with various construction material.In order to meet the requirement of structure in function and use, these structures must be made within the operating period of regulation to bear outside and the inner various effects formed safely and effectively.For special structure or employing new material, the structure of design of new processes and the region of structure stress complexity, owing to there is no ripe design experiences, often need by testing bearing capacity, rigidity and the shock resistance etc. of determining structure.Along with the development of computer technology, utilize computer-controlled structural test technology for realizing Load Simulation, data acquisition, data processing, and whole process of the test realizes robotization and provides advantage, the development of structural test technology is made to create the change of essence.The various data acquisition completed by computing machine and automated processing system accurately, in time, intactly can be collected and be expressed the various information of load and structure behavior.
In structural test, the measurement of displacement is the routine measurement project of structural test, the equipment and instrument of present measurement displacement is a lot, such as hand-held strainmeter, draw-wire displacement sensor, post rod type displacement transducer and non-contact displacement transducer etc., these sensors often will be installed fixing by Magnetic gauge stand.When construction material matrix is not steel, Magnetic gauge stand cannot use.In addition, these sensor bulk are comparatively large, should not fix when measuring the point-to-point transmission relative displacement of small size cross section, or fixing rear easily disturbance.Such as, when being used as concrete joint performance test (or concrete component seismic testing), during measured node district (or plastic hinge shearing comparatively large regions) two pairs of angle point relative displacements, bearing will be processed specially and fix displacement meter, because displacement meter volume is larger, be difficult to accurate for displacement meter centering to node area diagonal angle line, in addition, in experimentation, node area (or plastic hinge shearing comparatively large regions) line direction, diagonal angle is change, the direction of displacement meter can not change thereupon, so just causes very large measuring error.If adopt hand-held strain-ga(u)ge measurement node area (or plastic hinge shearing comparatively large regions) to angle point relative deformation, can not automatic data collection be realized.
Utility model content
For overcoming the deficiencies such as existing displacement measuring instrument volume more greatly, is not easily installed, measuring condition is harsh, technical problem to be solved in the utility model is: provide a kind of volume little, easy to install and can meet the displacement detecting sensor of routine measurement requirement.
The utility model solves the technical scheme that its technical matters adopts: adhesion type relative displacement transducer, comprise the first bearing, the second bearing, connecting rod and high-speed steel sheet, described connecting rod is arranged on the second holder top, connecting rod axis is perpendicular to the axis of the second bearing, one end of described high-speed steel sheet is positioned on the first bearing, the other end slidably with locking be arranged on connecting rod, described high-speed steel sheet is equipped with resistance strain gage on the two sides near first bearing one end, and resistance strain gage is provided with wire and is connected with data collecting instrument.
Further, the mode that described connecting rod and the second bearing adopt slidably and can lock is connected.
Further, the side of described second holder top is provided with through hole, and connecting rod is provided with helicitic texture, and described connecting rod is through passing through the nut lock of bearing both sides after the through hole on the second bearing on the second bearing.
Further, described high-speed steel sheet is provided with through hole away from one end of the first bearing, and connecting rod is provided with helicitic texture, and described connecting rod is passed described through hole and is fixed on connecting rod by high-speed steel sheet by the nut of high-speed steel sheet both sides.
Further, described resistance strain gage scribbles the diaphragm of moistureproof and waterproof.
Further, the bottom of described first bearing and the second bearing is provided with mounting hole and fixed orifice, and described mounting hole site is coaxial with bearing in two rest bases, and described fixed hole position is in two bearing sides and be connected with mounting hole, and described fixed orifice is threaded hole.
Further, described first bearing is also provided with detachable protective cover, in high-speed steel sheet is wrapped in by described protective cover.
The beneficial effects of the utility model are: structure is simple, volume is little, integrate displacement measurement and erection support, easy to install, utilize the features such as the high sensitivity of high-speed steel sheet plastic-less deformation and resistance strain gage to carry out displacement detecting, principle is simple, good linearity, highly sensitive, meet the requirement of general structure test, be well suited for the measurement of small scale structures surface point-to-point transmission displacement.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Be labeled as in figure, 1-first bearing, 2-second bearing, 3-connecting rod, 4-protective cover, 5-high-speed steel sheet, 6-mounting hole, 7-fixed orifice, 8-trip bolt, 9-resistance strain gage, 10-through hole, 11-through hole, 12-nut, 13-wire.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further illustrated.
As shown in Figure 1, the utility model comprises the first bearing 1, second bearing 2, connecting rod 3 and high-speed steel sheet 5, described connecting rod 3 is arranged on the second bearing 2 top, connecting rod 3 axes normal is in the axis of the second bearing 2, one end of described high-speed steel sheet 5 is positioned on the first bearing 1, the other end slidably with locking be arranged on connecting rod 3, described high-speed steel sheet 5 is being equipped with resistance strain gage 9 near the two sides of first bearing 1 one end, and resistance strain gage 9 is provided with wire 13 and is connected with data collecting instrument.Two bearing physical dimension should be as far as possible little, and diameter is within 10mm, and the feature of ability reflect structure surface " point " like this, is easy to measure the point-to-point transmission displacement of small scale structures surface.Adopt the object of high-speed steel sheet to be that by the statistical regression of test findings, its linear coefficient is 0.999 because high-speed steel sheet does not have plastic yield, the precision measured can be ensured.
Principle of work of the present utility model and the course of work are: first arrange push rod displacement meter in the position that connecting rod 3 is connected with high-speed steel sheet 5, then by push rod displacement meter with instructions prescribed manner and resistance strain gage 9 with half-bridge mode together access data Acquisition Instrument, change the distance between bearing 1 and bearing 2, utilize data collecting instrument to demarcate the relation of resistance strain gage reading and push rod displacement meter reading, obtain nominal data table.When using, this adhesion type relative displacement transducer is fixed on concrete surface, the distance of adjustment high-speed steel sheet 5 on pull bar 3, makes it be in the state of nature of nothing distortion, is then locked on pull bar 3 by high-speed steel sheet 5.When concrete between the first bearing 1 and the second bearing 2 has a relative displacement, two bearings will relative movement, because connecting rod 3 length is constant, corresponding movement between two bearings just can drive high-speed steel sheet 5 to occur bending and deformation, this flexural deformation can make the resistance strain gage 9 of high-speed steel sheet 5 tension side extend, and the resistance strain gage 9 of pressurized side shortens.Because two panels foil gauge accesses strain data Acquisition Instrument in half-bridge mode by wire, temperature error can be eliminated automatically.According to the nominal data table of adhesion type relative displacement, the relative displacement of point-to-point transmission can directly be obtained by the reading strain of resistance strain gage.
The utility model very crucial step when installing is the length of the pull bar 3 adjusted between two bearings, because the high-speed steel sheet 5 under making state of nature is without distortion, the accuracy that guarantee is measured, so in order to can the distance of pull bar 3 between install and adjust two bearing faster, the mode that described connecting rod 3 and the second bearing 2 adopt slidably and can lock be connected.The position of pull bar 3 on the second bearing 2 and the position of high-speed steel sheet 5 on pull bar 3 can be adjusted when in use simultaneously, add the dirigibility of adjustment, thus ensure that high-speed steel sheet 5 when mounted without distortion.Pull bar 3 and the second bearing 2 adopt slidably to be connected with the mode of locking also has a benefit to be exactly pull bar 3 can be taken off when not using, and is convenient to collection and carries.
Pull bar 3 and the second bearing 2 slidably and can lock that be connected can in the following ways: the side at described second bearing 2 top is provided with through hole 10, connecting rod 3 is provided with helicitic texture, and described connecting rod 3 is locked on the second bearing 2 by the nut 12 of bearing both sides through after the through hole 10 on the second bearing 2.This mode structure is simple, takes up room little, and carries out locking also reliable and stable with the nut of both sides.
The connected mode that high-speed steel sheet 5 and the connected mode of pull bar 3 also adopt pull bar 3 similar to the second bearing 2, namely through hole 12 is provided with at described high-speed steel sheet 5 away from one end of the first bearing 1, connecting rod 3 is provided with helicitic texture, and described connecting rod 3 is passed described through hole 12 and is fixed on connecting rod 3 by high-speed steel sheet 5 by the nut 12 of high-speed steel sheet 5 both sides.Through hole 12 can be oval, can compensate the error of each rod member on making.When installation behind the position fixing two bearings, first unclamp the nut 12 of high-speed steel sheet 5 both sides, the nut 12 rotating both sides when high-speed steel sheet 5 is descended in the raw is again fixed on pull bar 3.
Due to the vitals that resistance strain gage 9 is these sensors, in order to ensure its serviceable life and high precision, need to make moistureproof, water-proofing treatment on described resistance-strain 9.Concrete can, at its moisture repellant matter such as surface smear rosin, paraffin cream, then adopt epoxy resin adhesive plaster to wrap up.
The utility model needs the surface of wall two bearings being fixed on needs detection before measuring, concrete mode of operation is: the structure being first two bearings, mounting hole 6 and fixed orifice 7 is provided with in the bottom of described first bearing 1 and the second bearing 2, described mounting hole 6 is positioned at two rest bases and coaxial with bearing, described fixed orifice 7 is positioned at two bearing sides and is connected with mounting hole 6, and described fixed orifice 7 is threaded hole.Then be the process to metope, carry out perforating with electric hammer after first determining point of fixity, then load the expansion bolt of plastics, inject 502 glue in hole for the expansion bolt, squeeze into hole for the expansion bolt with the stainless steel lag screws removing the head of a nail, ailhead exposes certain distance.Finally the mounting hole 6 of two rest bases is penetrated on the stainless steel lag screws exposed, then penetrate from fixed orifice 7 with trip bolt 8, stainless steel lag screws is locked in the mounting hole 6 of bearing, thus bearing is fixed on wall.
High-speed steel sheet 5 in order to better protect high-speed steel sheet 5 and resistance strain gage 9, described first bearing 1 is also provided with detachable protective cover 4, in can be wrapped in by described protective cover 4.This protective cover 4 can adopt PVC plastic pipe, is directly enclosed within high-speed steel sheet 5 outer just when not using.
The utility model is applicable to the measurement of the small size surface point-to-point transmission relative displacement of any basal body structure, be not only applicable to the measurement of the relative displacement of measuring unidirectional loading, also the measurement of relative displacement under course under cyclic loading is applicable to, it is a kind of stable performance, the adhesion type relative displacement transducer can promoted the use of in civil engineering work test is measured, has good application prospect and practicality.
Claims (7)
1. adhesion type relative displacement transducer, it is characterized in that: comprise the first bearing (1), second bearing (2), connecting rod (3) and high-speed steel sheet (5), described connecting rod (3) is arranged on the second bearing (2) top, connecting rod (3) axes normal is in the axis of the second bearing (2), one end of described high-speed steel sheet (5) is positioned on the first bearing (1), the other end slidably with locking be arranged on connecting rod (3), described high-speed steel sheet (5) is equipped with resistance strain gage (9) on the two sides near the first bearing (1) one end, resistance strain gage (9) is provided with wire (13) and is connected with data collecting instrument.
2. adhesion type relative displacement transducer as claimed in claim 1, is characterized in that: the mode that described connecting rod (3) and the second bearing (2) adopt slidably and can lock is connected.
3. adhesion type relative displacement transducer as claimed in claim 2, it is characterized in that: the side at described second bearing (2) top is provided with through hole (10), connecting rod (3) is provided with helicitic texture, and described connecting rod (3) is locked on the second bearing (2) by the nut (12) of bearing both sides afterwards through the through hole (10) on the second bearing (2).
4. adhesion type relative displacement transducer as claimed in claim 1, it is characterized in that: described high-speed steel sheet (5) is provided with through hole (11) away from one end of the first bearing (1), connecting rod (3) is provided with helicitic texture, and high-speed steel sheet (5) is fixed on connecting rod (3) through described through hole (11) and by the nut (12) of high-speed steel sheet (5) both sides by described connecting rod (3).
5. adhesion type relative displacement transducer as claimed in claim 1, is characterized in that: the diaphragm described resistance strain gage (9) scribbling moistureproof and waterproof.
6. the adhesion type relative displacement transducer as described in Claims 1 to 5 any one claim, it is characterized in that: the bottom of described first bearing (1) and the second bearing (2) is provided with mounting hole (6) and fixed orifice (7), described mounting hole (6) is positioned at two rest bases and coaxial with bearing, described fixed orifice (7) is positioned at two bearing sides and is connected with mounting hole (6), and described fixed orifice (7) is threaded hole.
7. adhesion type relative displacement transducer as claimed in claim 6; it is characterized in that: described first bearing (1) is also provided with detachable protective cover (4), in high-speed steel sheet (5) is wrapped in by described protective cover (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520611140.2U CN205014938U (en) | 2015-08-14 | 2015-08-14 | Adhere to formula relative displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520611140.2U CN205014938U (en) | 2015-08-14 | 2015-08-14 | Adhere to formula relative displacement sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205014938U true CN205014938U (en) | 2016-02-03 |
Family
ID=55213533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520611140.2U Expired - Fee Related CN205014938U (en) | 2015-08-14 | 2015-08-14 | Adhere to formula relative displacement sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205014938U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108286550A (en) * | 2018-04-18 | 2018-07-17 | 浙江大学宁波理工学院 | The mounting structure and installation method of concrete stress strain-Sensing device |
-
2015
- 2015-08-14 CN CN201520611140.2U patent/CN205014938U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108286550A (en) * | 2018-04-18 | 2018-07-17 | 浙江大学宁波理工学院 | The mounting structure and installation method of concrete stress strain-Sensing device |
| CN108286550B (en) * | 2018-04-18 | 2023-05-30 | 浙江大学宁波理工学院 | Mounting structure and mounting method of concrete stress-strain detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160203 Termination date: 20180814 |