CN204730964U - A kind of high sensitivity strain gauge - Google Patents
A kind of high sensitivity strain gauge Download PDFInfo
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- CN204730964U CN204730964U CN201520454186.8U CN201520454186U CN204730964U CN 204730964 U CN204730964 U CN 204730964U CN 201520454186 U CN201520454186 U CN 201520454186U CN 204730964 U CN204730964 U CN 204730964U
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- strain gauge
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- strainometer
- sensitivity strain
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Abstract
The utility model relates to sensor technical field, refers in particular to <b> high sensitivity strain gauge </b>.The utility model comprises: can concentrate beam by diastrophic stress, concentrate the stress raiser of beam to be provided with semiconductor strain gauge at stress, semiconductor strain gauge composition Wheatstone bridge; Also comprise and be arranged at clamped beam and the wireless signal transmission that stress concentrates beam two ends.High sensitivity strain gauge of the present utility model is arranged in various complex large-sized structure.Micro-shape strain of real-time these labyrinths of detection.As structures such as large-scale steel structure, the Weight structure that cannot measure, tunnel culvert bridges.And there is the feature of impedance height and highly sensitive low-power consumption, easily realize wireless networked monitor and managment.
Description
Technical field
The utility model relates to sensor technical field, refers in particular to
a kind of high sensitivity strain gauge.
Background technology
When current bridge construction, goods consigned, all need to monitor the STRESS VARIATION of structure and the weight of bearing, when monitoring, the general metallic resistance strainometer that adopts is monitored.And current strainometer is when detecting small strain, signal is less, and signal to noise ratio (S/N ratio) can not meet test request.
Summary of the invention
The utility model provides a kind of high sensitivity strain gauge for the problem of prior art, and this strain gauge is convenient to be fixed on miniature deformation place, and can be sensitive induce deformation, monitor out the STRESS VARIATION of deformation place.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of high sensitivity strain gauge, comprising: can concentrate beam by diastrophic stress, concentrate the stress raiser of beam to be provided with strainometer at stress, strainometer composition Wheatstone bridge; Small strain can be experienced.Also comprise and be arranged at the clamped beam that stress concentrates beam two ends.
Wherein, described clamped beam is provided with the fixed orifice for being fixed on measured object.
The micro-molten semiconductor silicon strainometer of glass or semiconductor diffuse si strainometer or ceramic thick film resistor strainometer are counted in strain.
A kind of high sensitivity strain gauge also comprises wireless signal transmission.By arranging wireless signal transmission, can remote measurement be carried out, wireless remote monitoring.Further, stress concentrates the middle part of beam to be provided with elastic construction.
Wherein, elastic construction can be following several structure:
1, elastic body is V or U-shaped, middle formation elastic space, and when two ends are stressed, the deformation in the middle part of it is comparatively large, can produce enough strain signals.
2, elastic body is curved, as parabola shaped etc.
3, elastic body twist or corrugated.
Wherein, stress concentrates cantilever thickness to be that intermediate thin two ends are thick.This structure makes stress concentrate the easier deformation of beam.
Further, described stress concentrates the outside of beam to be arranged with elastic shell, and the two ends of elastic shell are fixedly connected with clamped beam respectively.Stress concentrates beam and strainometer protection in inside by elastic shell, prevents external disturbance.Elastic shell is preferably chosen as corrugated tube, and guard etc.
Further, the middle part of one of them clamped beam is provided with through hole, and one end of signal wire is connected with strainometer signal by through hole.When specifically arranging, preferably, signal wire is drawn from the end face of clamped beam.
Further, described strainometer and stress concentrate the fixed form of beam to be the micro-molten formula of glass, and its making comprises:
Step 1; Silk screen printing glass paste on cleaned metal elastic gonosome.Step 2; Silicon strain gage is installed in the position printing glass paste at elastic body.Step 3; Sensor is sent into high temperature tunnel furnace, completes the bonding of silicon strain gage and metal elastic gonosome.Step 4; With gold wire ball welding, silicon strain gage is formed resistance bridge by connection terminal.
The beneficial effects of the utility model are:
1: to the real-time monitoring in heavy construction life-span.The measurement of building settlement.2: to measurement and the monitoring of tunnel culvert bridge change sedimentation.3: to measurement and the monitoring of railway dynamic change and sedimentation.4: high voltage cable, the wirerope that bears load are carried out measuring and monitored.5: large hydraulic engineering is layouted and measures and monitoring.
The measurement of large-scale component specific to each local small strain, by tool portion integral analysis of data of rationally layouting, thus can be obtained to the real time status of component and building, provides scientific and reasonable solution to owner and design department.
Strain gauge of the present utility model adopts clamped beam to be fixed on test position, by the strain variation accumulation of the different point of fixity of test position, concentrate on beam at stress and form larger strain variation, adopt the micro-molten formula silicon strain gage of glass simultaneously, strain induced signal is amplified, and precision is also improved simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of stress induction device of the present utility model.
Fig. 2 is the schematic diagram at the another kind of visual angle of Fig. 1.
Reference numeral is:
1---clamped beam; 2---stress concentrates beam; 3---semiconductor strain gauge; 4---elastic shell;
5---signal wire; 11---fixed orifice.
Embodiment
For the ease of the understanding of those skilled in the art, be further described the utility model below in conjunction with embodiment and accompanying drawing, the content that embodiment is mentioned is not to restriction of the present utility model.See Fig. 1 to Fig. 2, below in conjunction with accompanying drawing, the utility model is described in detail.
A kind of high sensitivity strain gauge by: a, stress concentrate the processing of beam 2, and the micro-molten technology of glass of b, semiconductor silicon strain resistor is installed, and c, temperature and stability techniques, d, welding or sulfuration Sealing Technology complete.Its concrete structure is: comprise and can concentrate beam 2 by diastrophic stress, the stress raiser of beam 2 is concentrated to be provided with silicon semiconductor strainometer 3 at stress, general design concentrates the middle part of beam 2 at stress, and semiconductor strain gauge 3 forms Wheatstone bridge can experience small strain.Also comprise and be arranged at the clamped beam 1 that stress concentrates beam 2 two ends.
For convenience of the setting of strain gauge and the acquisition of signal, high sensitivity strain gauge also comprises wireless signal transmission; Wireless signal transmission and Wheatstone bridge signal output part signal be connected; Be applied to detect at a distance time, may correspond to force snesor and layout, arrange node collect signal; By the Signal transmissions of strain gauge at a distance.
Secondly, when being installed by strain gauge, be fixed on measured object by the fixed orifice 11 on clamped beam 1, as by bolt etc.After fixing, the deformation residual quantity of measured object is accumulated by two clamped beams 1, thus is amplified by stress deformation.When measured object is more greatly or comparatively complicated, strain gauge can be set on measured object, and the data of counter stress sensor are carried out collections and are processed, and can obtain weight change corresponding to measured object STRESS VARIATION or body shape changes etc. more.
When design stress sensor, stress concentrates the outside of beam 2 to be arranged with elastic shell, and the two ends of elastic shell are fixedly connected with clamped beam 1 respectively.Stress concentrates beam and strainometer protection in inside by elastic shell, prevents external disturbance.Elastic shell 4 is preferably chosen as corrugated tube, flexible jacket, as rubber sleeve; And guard etc.In the technical program, adopt rubber sleeve.Rubber sleeve can play auxiliary fixing, locating effect.
The middle part of one of them clamped beam 1 is provided with through hole, and one end of signal wire 5 is connected with strainometer signal by through hole.When specifically arranging, preferably, signal wire is drawn from the end face of clamped beam.When making strain gauge, semiconductor strain gauge 3 and stress concentrate the fixed form of beam 2 to be the micro-molten formula of glass, and its making comprises the following steps:
Step 1; Silk screen printing glass paste on cleaned metal elastic gonosome.Step 2; Silicon strain gage is installed in the position printing glass paste at elastic body.Step 3; Sensor is sent into high temperature tunnel furnace, completes the bonding of silicon strain gage and metal elastic gonosome.Step 4; With gold wire ball welding, silicon strain gage is formed resistance bridge by connection terminal.
Above content is only preferred embodiment of the present utility model, for those of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, this description should not be construed as restriction of the present utility model.
Claims (6)
1. a high sensitivity strain gauge, is characterized in that: comprising: can concentrate beam by diastrophic stress, concentrate the stress raiser of beam to be provided with strainometer at stress, strainometer composition Wheatstone bridge; Described a kind of high sensitivity strain gauge also comprises and is arranged at the clamped beam that stress concentrates beam two ends.
2. a kind of high sensitivity strain gauge according to claim 1, is characterized in that: the micro-molten semiconductor silicon strainometer of glass or semiconductor diffuse si strainometer or ceramic thick film resistor strainometer are counted in strain.
3. a kind of high sensitivity strain gauge according to claim 1, is characterized in that: also comprise wireless signal transmission.
4. a kind of high sensitivity strain gauge according to claim 1, is characterized in that: stress concentrates cantilever thickness to be that intermediate thin two ends are thick.
5. a kind of high sensitivity strain gauge according to claim 1, is characterized in that: described stress concentrates the outside of beam to be arranged with elastic shell, and the two ends of elastic shell are fixedly connected with clamped beam respectively.
6. a kind of high sensitivity strain gauge according to claim 1, is characterized in that: described clamped beam is provided with the fixed orifice for being fixed on measured object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520454186.8U CN204730964U (en) | 2015-06-29 | 2015-06-29 | A kind of high sensitivity strain gauge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520454186.8U CN204730964U (en) | 2015-06-29 | 2015-06-29 | A kind of high sensitivity strain gauge |
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| CN204730964U true CN204730964U (en) | 2015-10-28 |
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| CN201520454186.8U Active CN204730964U (en) | 2015-06-29 | 2015-06-29 | A kind of high sensitivity strain gauge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931165A (en) * | 2015-06-29 | 2015-09-23 | 东莞市华兰海电子有限公司 | High-sensitivity stress sensor |
| CN105928642A (en) * | 2016-04-23 | 2016-09-07 | 北京工业大学 | Detachable sleeve type force sensor used for bracket structure |
-
2015
- 2015-06-29 CN CN201520454186.8U patent/CN204730964U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931165A (en) * | 2015-06-29 | 2015-09-23 | 东莞市华兰海电子有限公司 | High-sensitivity stress sensor |
| CN105928642A (en) * | 2016-04-23 | 2016-09-07 | 北京工业大学 | Detachable sleeve type force sensor used for bracket structure |
| CN105928642B (en) * | 2016-04-23 | 2018-10-12 | 北京工业大学 | A kind of removable sleeve formula force snesor for supporting structure |
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Address after: 523000 Guangdong city of Dongguan province Sheng Machong Town Industrial Park Patentee after: GUANGDONG SOUTH CHINA SEA ELECTRONIC MEASURING TECHNOLOGY CO., LTD. Address before: 523136 Guangdong city of Dongguan province Sheng Machong Town Industrial Park Dongguan southchinasea Electronics Co. Ltd Patentee before: Dongguan Hualanhai Electronics Co.,Ltd. |