CN202494535U - Multi-directional rigid solid internal stress subtle change monitor - Google Patents
Multi-directional rigid solid internal stress subtle change monitor Download PDFInfo
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- CN202494535U CN202494535U CN2012200069501U CN201220006950U CN202494535U CN 202494535 U CN202494535 U CN 202494535U CN 2012200069501 U CN2012200069501 U CN 2012200069501U CN 201220006950 U CN201220006950 U CN 201220006950U CN 202494535 U CN202494535 U CN 202494535U
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- piezoelectric ceramics
- rigid solid
- internal stress
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Abstract
The utility model relates to a multi-directional rigid solid internal stress subtle change monitor. The monitor comprises a fixing plate and at least four sets of stress acquisition devices and at least four sets of mechanical and electrical conversion devices, wherein at least four sets of stress acquisition devices and at least four sets of mechanical and electrical conversion devices are fixedly arranged on the fixing plate. The stress acquisition device comprises an expansion screw driven into the rigid solid and a conductive sheet fixedly connected with the screw. The mechanical and electrical conversion device comprises a piezoelectric ceramic rod and a screw rod with a spiral adjusting device. The conductive sheet and the screw rod are fixedly connected through a fixing sleeve which is sleeved on the screw rod. An end part of the screw rod abuts against one end of the piezoelectric ceramic rod, and the other end of the piezoelectric ceramic rod is fixed on the fixing plate. Four sets of stress acquisition devices and four sets of mechanical and electrical conversion devices are uniformly distributed at four different directions of the fixing plate.
Description
Technical field
The utility model relates to a kind of monitor that the rigid solid internal stress changes of measuring; Especially a kind of degree of accuracy and the high energy measurement of sensitivity go out the monitor that small internal stress changes; Can be used for detecting various dam internal stresss and change, predict the unusual of dam in advance, accomplish to prevent trouble before it happens.Also can apply to detect the variation of internal stresss such as bridge, heavy construction, its deformation is analyzed, safeguard foundation for the safe operation of bridge, heavy construction provides.Also can be used for the monitoring of earthquake.
Background technology
Object produces interactional internal force owing to external cause (stressed, humidity variation etc.) when being out of shape between the each several part in object, resisting the effect of this external cause, and try hard to make the position before the position of object after the distortion is returned to distortion.Internal force on some unit areas in the cross section of being investigated is called stress.With the cross section vertical be called normal stress or normal stress.
Do not having in the presence of the external force, material internal is improper owing to machine-shaping, temperature variation, the stress that reason produced such as solvent action.
The cancellation of internal stress has several method:
1. object is heat-treated (workpiece that only is directed against metalline)
2. be put under the natural conditions and eliminate.
3. manual work is eliminated through beaing modes such as vibration.
Internal stress is structurally not have external force remaines in interior of articles as the time spent stress; When not having external force to exist; The stress of being preserved in the elastomeric objects is called internal stress; Its feature is the power system that in object, forms a balance; Promptly observe the statics condition. can be divided into macro-stress by character and range size, microstress and ultramicroscopic view stress. by causing that reason can be divided into thermal stress and cover is knitted stress. can be divided into instantaneous stress and unrelieved stress by life period. can be divided into meridional stress and transverse stress by action direction.
Piezoelectric effect is the phenomenon that a kind of mechanical energy and electric energy exchange in the material, this phenomenon be the earliest 1880 by the fraternal discovery of Pi Aier Curie (Pierre Curie) and refined gram Curie (Jacques Curie).Piezoelectric can produce electric field because of mechanically deform, also can be because of electric field action produce mechanically deform, and this intrinsic machine-coupling effect makes that piezoelectric has obtained using widely in engineering.For example, piezoelectric has been used to make intelligence structure, and this class formation also has functions such as self diagnosis property, adaptivity and self-repairability except that having self-bearing capacity, in the Flight Vehicle Design in future, occupy an important position.Piezoelectric effect is the phenomenon that mechanical energy and electric energy transform each other in some special material.According to the difference that transforms direction, piezoelectric effect can be divided into two kinds of direct piezo electric effect and inverse piezoelectric effects.
When some dielectric is out of shape in the effect that on certain orientation, receives external force; Its inner meeting produces polarization phenomena, on its two apparent surfaces, occurs positive and negative opposite electric charge simultaneously, after external force is removed; It can return to uncharged state again, and this phenomenon is called direct piezo electric effect.When the direction of acting force changed, the polarity of electric charge also changed thereupon.On the contrary, when on the polarization of dielectric direction, applying electric field, these dielectrics also can deform, and after electric field removed, dielectric distortion disappeared thereupon, and this phenomenon is called inverse piezoelectric effect, or is called electrostriction phenomena.
Excellent characteristics such as that the piezoelectric ceramics pressure transducer has is simple in structure, volume is little, in light weight, long service life.High sensitivity piezoelectric ceramic makes it even can sense the disturbance of tens meters outer winged insects beating wings to air the sensitivity of external force, makes rigid solid internal stress subtle change monitor with it, can accurately measure the subtle change of stress.Use the piezoelectric ceramics rod in the PSTM, its sensitivity is in time reacted to the deformation energy that internal stress subtle change in the rock causes up to 16 dust/volts.
Summary of the invention
The purpose of the utility model is that the piezoelectric ceramics rod is applied in the monitor, provides a kind of sensitivity very high, and is easy to observe the rigid solid internal stress subtle change monitor of variation
The utility model is to realize through following technical scheme: comprised shaft collar and be fixedly mounted on stress harvester of quadruplet at least and the quadruplet power electrical switching device on the said shaft collar to rigid solid internal stress subtle change monitor in a kind of many minutes; Wherein, said stress harvester comprises the swell fixture of squeezing into said rigid solid and the conductive sheet that is connected with said screw retention; Said power electrical switching device comprises the piezoelectric ceramics rod and has the screw rod of spiral regulating device; Wherein, said conductive sheet is fixedly connected through the fixed cover that is enclosed within on the screw rod with said screw rod, and the end of said screw rod props up an end of said piezoelectric ceramics rod, and the other end of said piezoelectric ceramics rod is fixed on the said shaft collar; Said 4 cover stress harvesters and power electrical switching device are evenly distributed on 4 different directions of said shaft collar.
Said piezoelectric ceramics rod is for being exclusively used in the high sensitivity piezoelectric ceramic rod of PSTM.
Said monitor also comprises a data acquisition unit and data-out port, and an end of said data acquisition unit is connected with said data-out port to collect the data of variation in voltage, and the other end is connected with computing machine to handle and video data through USB interface; Said data-out port is derived line with the data of said piezoelectric ceramics rod and is connected.
Said monitor comprises 8 cover stress harvesters and 8 cover power electrical switching devices, and this 8 cover stress harvester and power electrical switching device are evenly distributed on eight different directions of said shaft collar.
The said screw rod that has spiral regulating device comprises the vernier adjustment knob, knob, movable mark of micrometer caliper, fixedly scale and screw rod.
Said piezoelectric ceramics rod is fixed on the said shaft collar through piezoelectric ceramics rod fixed head, piezoelectric ceramics rod gib screw and piezoelectric ceramics rod back-up ring.
For ease the utility model is confirmed to be provided with a compass at the center of said shaft collar by installation direction on being installed to rigid solid the time.
The beneficial effect of the utility model is:
1, the piezoelectric ceramics rod in the creationary use PSTM of the utility model is as the critical component of detector, and its sensitivity is in time reacted to the deformation energy that internal stress subtle change in the rock causes up to 16 dust/volts.
2, the utility model connects the piezoelectric signal on all directions through data acquisition unit, and collector is issued PC with the data that collect and shown to be data processing.Greatly made things convenient for and installed and use.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Fig. 2 is the stress harvester of the utility model and the structural representation of power electrical switching device.
Fig. 3 is the data transmission synoptic diagram of the utility model.
Fig. 4 is the structural representation of an embodiment of the utility model.
Among the figure, 1, stress harvester and power electrical switching device; 11, vernier adjustment knob; 12, knob; 13, fixing scale; 14, fixed cover; 15, piezoelectric ceramics rod; 151, piezoelectric ceramics rod fixed head; 152, piezoelectric ceramics rod gib screw; 16, piezoelectric ceramics rod back-up ring; 17, conductive sheet; 171, squeeze into the swell fixture of said rigid solid; 18, screw rod 2, shaft collar; 3, the data of piezoelectric ceramics rod derive line; 4, data-out port; 5, compass; 6, data acquisition unit; 7, computing machine.
Embodiment
Below in conjunction with accompanying drawing and embodiment the technical scheme of the utility model is elaborated.
As depicted in figs. 1 and 2, comprised shaft collar 2 and be fixedly mounted on cover stress harvester of 8 on the said shaft collar and power electrical switching device 1 to rigid solid internal stress subtle change monitor in a kind of many minutes; Wherein, said stress harvester comprises the swell fixture 171 of squeezing into said rigid solid and the conductive sheet 17 that is connected with said screw retention; Said power electrical switching device comprises piezoelectric ceramics rod 15 and has the screw rod 18 of spiral regulating device; Wherein, said conductive sheet is fixedly connected through the fixed cover 14 that is enclosed within on the screw rod with said screw rod, and the end of said screw rod 18 props up an end of said piezoelectric ceramics rod 15, and the other end of said piezoelectric ceramics rod is fixed on the said shaft collar 2; Said 8 cover stress harvesters and power electrical switching device are evenly distributed on 8 different directions of said shaft collar.
Said piezoelectric ceramics rod is for being exclusively used in the high sensitivity piezoelectric ceramic rod of PSTM.
As shown in Figure 3; Said monitor also comprises a data acquisition unit 6 and data-out port 4; One end of said data acquisition unit is connected with said data-out port to collect the data of variation in voltage, and the other end is connected with computing machine to handle and video data through USB interface; Said data-out port 4 is derived line 3 with the data of said piezoelectric ceramics rod and is connected.
The said screw rod that has spiral regulating device comprises the vernier adjustment knob 11, knob 12, movable mark of micrometer caliper, fixedly scale 13 and screw rod 18.
Said piezoelectric ceramics rod is fixed on the said shaft collar 2 through piezoelectric ceramics rod fixed head 151, piezoelectric ceramics rod gib screw 152 and piezoelectric ceramics rod back-up ring 16.
For ease the utility model is confirmed installation direction on being installed to rigid solid the time, be provided with a compass 5 at the center of said shaft collar.
Another embodiment of the utility model as shown in Figure 4; Said monitor comprises 4 cover stress harvesters; With 4 cover power electrical switching devices, this 4 cover stress harvester and power electrical switching device are evenly distributed on the due east, due south, Zheng Xi, positive northern 4 different directions of said shaft collar.
When the utility model uses; Piezoelectric ceramics is fixed by fixed part, and this part promptly can not moved freely, and does not receive the compressing of Metallic rod again; Relative position for convenient adjustment Metallic rod and piezoelectric ceramics; Used the Metallic rod and the spiral part of micrometer caliper, and according to the position of slightly approaching method of adjustment adjustment Metallic rod and piezoelectric ceramics of PSTM, Metallic rod is just contacted with piezoelectric ceramics and do not had interaction force.When the Metallic rod of tangent screw mircrometer gauge, on the sidewall of piezoelectric ceramics, can detect voltage with the digital versatile ammeter.Promptly can detect the variation of minimal stress with the high sensitivity piezoelectric ceramic rod.
Claims (7)
1. more than one kind minute to rigid solid internal stress subtle change monitor, it is characterized in that: comprise shaft collar and be fixedly mounted on stress harvester of quadruplet at least and the quadruplet power electrical switching device on the said shaft collar; Wherein, said stress harvester comprises the swell fixture of squeezing into said rigid solid and the conductive sheet that is connected with said screw retention; Said power electrical switching device comprises the piezoelectric ceramics rod and has the screw rod of spiral regulating device; Wherein, said conductive sheet is fixedly connected through the fixed cover that is enclosed within on the screw rod with said screw rod, and the end of said screw rod props up an end of said piezoelectric ceramics rod, and the other end of said piezoelectric ceramics rod is fixed on the said shaft collar; Said 4 cover stress harvesters and power electrical switching device are evenly distributed on 4 different directions of said shaft collar.
2. it is characterized in that to rigid solid internal stress subtle change monitor in many minutes according to claim 1: said piezoelectric ceramics rod is for being exclusively used in the high sensitivity piezoelectric ceramic rod of PSTM.
3. many minutes according to claim 1 to rigid solid internal stress subtle change monitor; It is characterized in that: said monitor also comprises a data acquisition unit and data-out port; One end of said data acquisition unit is connected with said data-out port to collect the data of variation in voltage, and the other end is connected with computing machine to handle and video data through USB interface; Said data-out port is derived line with the data of said piezoelectric ceramics rod and is connected.
According to claim 1 or 3 described many minutes to rigid solid internal stress subtle change monitor; It is characterized in that: said monitor comprises 8 cover stress harvesters; With 8 cover power electrical switching devices, this 8 cover stress harvester and power electrical switching device are evenly distributed on eight different directions of said shaft collar.
According to claim 1 or 3 described many minutes to rigid solid internal stress subtle change monitor, it is characterized in that: the said screw rod that has spiral regulating device comprises the vernier adjustment knob, knob, movable mark of micrometer caliper, fixedly scale and screw rod.
6. it is characterized in that to rigid solid internal stress subtle change monitor in many minutes according to claim 1: said piezoelectric ceramics rod is fixed on the said shaft collar through piezoelectric ceramics rod fixed head, piezoelectric ceramics rod gib screw and piezoelectric ceramics rod back-up ring.
7. it is characterized in that: the center of said shaft collar was provided with a compass to rigid solid internal stress subtle change monitor in many minutes according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200069501U CN202494535U (en) | 2012-01-09 | 2012-01-09 | Multi-directional rigid solid internal stress subtle change monitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200069501U CN202494535U (en) | 2012-01-09 | 2012-01-09 | Multi-directional rigid solid internal stress subtle change monitor |
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| CN202494535U true CN202494535U (en) | 2012-10-17 |
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| CN2012200069501U Expired - Fee Related CN202494535U (en) | 2012-01-09 | 2012-01-09 | Multi-directional rigid solid internal stress subtle change monitor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103000974A (en) * | 2012-12-27 | 2013-03-27 | 北京航天测控技术有限公司 | High-precision broad band tunable X wave band cavity filter and design method thereof |
| CN106813816A (en) * | 2015-11-28 | 2017-06-09 | 陈剑 | Counterweight balance is measured |
| CN108469326A (en) * | 2018-02-28 | 2018-08-31 | 北京电子工程总体研究所 | A kind of micro- wrench of a force system measuring device and system |
| CN112393834A (en) * | 2020-12-01 | 2021-02-23 | 郑州铁路职业技术学院 | Internal stress monitoring system for railway bridge |
| CN112484982A (en) * | 2020-12-01 | 2021-03-12 | 郑州铁路职业技术学院 | Method for realizing real-time stress monitoring of railway bridge |
-
2012
- 2012-01-09 CN CN2012200069501U patent/CN202494535U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103000974A (en) * | 2012-12-27 | 2013-03-27 | 北京航天测控技术有限公司 | High-precision broad band tunable X wave band cavity filter and design method thereof |
| CN103000974B (en) * | 2012-12-27 | 2015-09-02 | 北京航天测控技术有限公司 | High-precision wideband adjustable X-band cavity body filter and method for designing |
| CN106813816A (en) * | 2015-11-28 | 2017-06-09 | 陈剑 | Counterweight balance is measured |
| CN106813816B (en) * | 2015-11-28 | 2020-07-10 | 陈剑 | Load balance measurement |
| CN108469326A (en) * | 2018-02-28 | 2018-08-31 | 北京电子工程总体研究所 | A kind of micro- wrench of a force system measuring device and system |
| CN112393834A (en) * | 2020-12-01 | 2021-02-23 | 郑州铁路职业技术学院 | Internal stress monitoring system for railway bridge |
| CN112484982A (en) * | 2020-12-01 | 2021-03-12 | 郑州铁路职业技术学院 | Method for realizing real-time stress monitoring of railway bridge |
| CN112484982B (en) * | 2020-12-01 | 2023-01-20 | 郑州铁路职业技术学院 | Method for realizing real-time stress monitoring of railway bridge |
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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: 20121017 Termination date: 20140109 |