CN100357716C - Resistance strained sensor with protector - Google Patents
Resistance strained sensor with protector Download PDFInfo
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- CN100357716C CN100357716C CNB2005100948236A CN200510094823A CN100357716C CN 100357716 C CN100357716 C CN 100357716C CN B2005100948236 A CNB2005100948236 A CN B2005100948236A CN 200510094823 A CN200510094823 A CN 200510094823A CN 100357716 C CN100357716 C CN 100357716C
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- elastic body
- sensor
- resistance strain
- free end
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Abstract
The present invention discloses a resistance strain type sensor with a protecting device, which comprises an elastic body, a resistance strain sheet and a contact head, wherein the resistance strain sheet is pasted on the surface of the elastic body, and the contact head is fixed at the free end of the elastic body. Additionally, a protecting sleeve is arranged, a cavity is formed in the protecting sleeve, and a lug boss used for fixing the fixed end of the elastic body is arranged at one side of the bottom surface of the cavity. Spacing lug bosses corresponding to the free end of the elastic body and having limiting spaces are respectively arranged on the top surface and the bottom surface of the cavity, and a through hole which can be used to let the contact head pass is arranged on the protecting sleeve. The upper and the lower two sides of the free end of the elastic body are protected in a limiting mode by the arrangement of the protecting sleeve, the normal work of the sensor is ensured, and a limiter and the main body of the sensor are combined together. The mounting error of the limiting space which is possible to occur during the mounting process is avoided, and the protecting sleeve can be designed in a proper shape according to needs. The sensor has the advantages of simple structure, convenient fabrication and low cost.
Description
One, technical field
The present invention relates to a kind of sensor, a kind of specifically resistance strain type sensor with protective device.
Two, background technology
Sensor is a kind of electronic detecting device, it can accept the information of object being measured, and export after detected information being for conversion into according to certain rules the information of electric signal or other desired forms, to satisfy requirements such as transmission of Information, processing, storage, demonstration, record and control.It is a primary link of realizing detection automatically and automatic control.Sensor can be divided into sensors such as resistance, electric capacity, electromagnetism, inductance, voltage, Hall, photoelectricity, grating, thermopair by the principle of work classification.Resistance strain type sensor is a kind of in the resistance sensor, and it is mainly as the survey sensor of electronic-weighing instrument.
The structure of resistance strain type sensor mainly comprises elastic body, resistance strain gage, contact, elastic body is generally made by aluminium alloy, be the beam type setting, contact is fixed on elastomeric free end, resistance strain gage sticks on elastomeric surface, and link to each other with the testing circuit of outside by lead, its principle of work is: the free end that acts on the elastic body semi-girder when external force, elastic body promptly produces elastic bending deflection, make the resistance strain gage that sticks on its surface also in company with producing distortion, after the resistance strain gage distortion, its resistance will change (increase or reduce), through the relevant detection circuit this change in resistance is converted to electric signal (voltage or electric current) output again, thereby has finished the process that external force is transformed to electric signal.In real work, when externally applied forces excessive and when surpassing elastomeric rated load or sensor and being subjected to powerful impulsive force, can make the inside crystal phase structure of elastomeric material impaired, lattice crystal grain can't restore to the original state and cause physical damnification, parameter changes such as the creep of sensor and output at zero point, the also corresponding increase of output error can make sensor normally use when serious.At present, the protective device of existing resistance strain type sensor is at the free-ended upper and lower of elastic body stop to be set, keep certain clearance between stop and the free end, this gap is determined according to the measurement range of sensor, when the external force that acts on is in measurement range, the elastic body deflection is within rated capacity, and free end does not contact with stop; When the external force that surpasses measurement range acted on sensor, the elastic body distortion increased, and then free end contacts with stop, made elastic body no longer continue to be out of shape and to cause physical damnification, had guaranteed the operate as normal of sensor.The main body of existing stop and sensor generally is to install respectively, do not integrate, even the sensor of band stop, it is bigger just to be limited to volume, does not have stop for the strain gauge transducer of general small size, therefore, cause installation and debugging all very difficult, particularly,, and influenced the normal use of sensor often because alignment error is bigger for the adjustment in the very high spacing gap of accuracy requirement.In addition, because the performance of sensor depends on the physical characteristics of elastic body and resistance strain gage, the shape of elastic body and resistance strain gage just can not have bigger change satisfying under the condition of request for utilization like this, and when such sensor application was in product, just the general plan to each parts in the product design had caused influence.
Three, summary of the invention
1, goal of the invention: the purpose of this invention is to provide a kind of resistance strain type sensor with protective device; this sensor integrates stop and sensor main body; and can all realize spacing to elastomeric both direction up and down in the sensor; guaranteed the operate as normal of sensor; the shape of sensor can design as required; and it is simple in structure, and is easily manufactured, and production cost is lower.
2; technical scheme: the resistance strain type sensor with protective device of the present invention; it comprises elastic body; resistance strain gage and contact; elastic body has stiff end and free end; resistance strain gage sticks on elastomeric upper and lower surface; contact is fixed on elastomeric free end; it is characterized in that: it also is provided with protective sleeve; be provided with cavity in the described protective sleeve; one side of cavity bottom surface is provided with the fixedly boss of elastic body stiff end; be respectively equipped with and the corresponding positive stop lug boss of elastic body free end at cavity end face and bottom surface; have spacing gap between positive stop lug boss and the elastic body free end, on protective sleeve, be provided with the through hole that contact is passed.
Since in the outer setting of sensor protective sleeve, make the sensor critical piece that is arranged in protective sleeve can not be subjected to the influence of other parts of detection system, effectively protected the operate as normal of sensor.Stop and sensor main body integrate, and sensor its spacing gap when dispatching from the factory is good with regard to adjusted, has avoided the alignment error that may occur in installation process.
Influence the operate as normal of resistance strain gage for protective sleeve is not contacted with resistance strain gage, be respectively equipped with the groove that holds resistance strain gage at cavity end face and bottom surface.
Convenience for the elastic body debugging can be provided with opening at the back side of protective sleeve.
The shape of protective sleeve can be set to rectangular parallelepiped, right cylinder or other suitable shape as required.
Principle of work: the present invention is respectively equipped with and the corresponding positive stop lug boss of elastic body free end in the end face and the bottom surface of protective sleeve cavity; and has the spacing gap of determining according to the measurement range of sensor between the two; be upward or downwards so no matter by the contact externally applied forces; when external force surpasses measurement range; the elastic body free end will contact with the end face or the bottom surface of cavity, promptly the free-ended both direction up and down of elastic body has all been implemented position limitation protection.
3, beneficial effect: the present invention compared with prior art has following characteristics: (1) is by being provided with protective sleeve, end face and bottom surface at the protective sleeve cavity are carried out spacing to the elastic body free end respectively, no matter making externally applied forces is upward or downwards, the elastic body free end has all obtained position limitation protection, has guaranteed the operate as normal of sensor; (2) elastic body, resistance strain gage and contact are set directly in the protective sleeve, have obtained effective protection at work; (3) stop and sensor main body integrate, and have avoided may occurring in installation process the alignment error in spacing gap; (4) protective sleeve can be designed to suitable shape as requested, is very beneficial for the needs in different application field; (5) this sensor construction is simple, and is easily manufactured, and production cost is lower.
Four, description of drawings
Fig. 1 is a front view of the present invention;
Fig. 2 is a vertical view of the present invention
Fig. 3 is a rear view of the present invention.
Five, embodiment
As shown in Figure 1, the resistance strain type sensor with protective device of the present invention, it comprises elastic body 1, resistance strain gage 2, contact 3 and protective sleeve 6.The elastic body 1 of present embodiment is a doubly-linked circular hole elastic body, can certainly adopt blossom type four to connect hole elastic body, three beam type elasticity of flexure bodies or three beam type shearing elasticity bodies, elastic body 1 has stiff end 4 and free end 5, resistance strain gage 2 sticks on the upper and lower surface in elastic body 1 stage casing, and links to each other with the testing circuit of outside by lead.Contact 3 is fixed on the upper surface of elastic body free end 5 by being threaded.Be provided with cavity 7 in the protective sleeve 6; elastic body 1, resistance strain gage 2 and contact 3 all are arranged in the cavity 7; one side of cavity 7 bottom surfaces is provided with boss 8; elastic body stiff end 4 is fixed on the boss 8 by screw or other connected mode; the middle part of cavity 7 end faces and bottom surface is respectively equipped with the groove 11 that holds resistance strain gage 2; at the corresponding opposite side of cavity 7 and elastic body free end 5; be respectively equipped with positive stop lug boss 9 on its end face and the bottom surface; have a spacing gap between positive stop lug boss 9 and the elastic body free end 5, this gap is determined according to the measurement range of sensor.As shown in Figure 2, the end face at protective sleeve 6 also is provided with the through hole 10 that contact 3 is passed.As shown in Figure 3, be provided with at the back side of protective sleeve 6 and be convenient to debug elastomeric opening 12.
Claims (2)
1; a kind of resistance strain type sensor with protective device; it comprises elastic body (1); resistance strain gage (2) and contact (3); elastic body (1) has stiff end (4) and free end (5); resistance strain gage (2) sticks on the surface of elastic body (1); contact (3) is fixed on the free end (5) of elastic body (1); it is characterized in that: it also is provided with protective sleeve (6); be provided with cavity (7) in the described protective sleeve (6); one side of cavity (7) bottom surface is provided with the fixedly boss (8) of elastic body stiff end (4); end face and bottom surface at cavity (7) are respectively equipped with and the corresponding positive stop lug boss of elastic body free end (5) (9); have spacing gap between positive stop lug boss (9) and the elastic body free end (5), on protective sleeve (6), be provided with the through hole (10) that contact (3) is passed.
2, the resistance strain type sensor with protective device according to claim 1 is characterized in that: be respectively equipped with the groove (11) that holds resistance strain gage (2) at cavity (7) end face and bottom surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100948236A CN100357716C (en) | 2005-10-14 | 2005-10-14 | Resistance strained sensor with protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100948236A CN100357716C (en) | 2005-10-14 | 2005-10-14 | Resistance strained sensor with protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1746635A CN1746635A (en) | 2006-03-15 |
| CN100357716C true CN100357716C (en) | 2007-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100948236A Expired - Fee Related CN100357716C (en) | 2005-10-14 | 2005-10-14 | Resistance strained sensor with protector |
Country Status (1)
| Country | Link |
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| CN (1) | CN100357716C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928060A (en) * | 2012-10-26 | 2013-02-13 | 梅特勒-托利多(常州)测量技术有限公司 | Annular limiting device of weighing apparatus |
| CN103196526B (en) * | 2013-03-13 | 2015-04-08 | 浙江省计量科学研究院 | Dynamometry weighing sensor with unbalance loading isolating function and isolating measuring method thereof |
| CN103162775B (en) * | 2013-03-18 | 2015-07-15 | 梅特勒-托利多(常州)精密仪器有限公司 | Cantilever beam type elastomer |
| WO2014146529A1 (en) * | 2013-03-18 | 2014-09-25 | 梅特勒-托利多(常州)精密仪器有限公司 | Elastic body of weighing sensor |
| CN103256971B (en) * | 2013-05-29 | 2015-04-29 | 梅特勒-托利多(常州)精密仪器有限公司 | Elastic body of weighing sensor |
| CN104089688A (en) * | 2014-07-25 | 2014-10-08 | 济南金钟电子衡器股份有限公司 | Thin-wall blind-hole column type weighing sensor |
| CN104751905B (en) * | 2015-04-22 | 2017-03-08 | 中国工程物理研究院总体工程研究所 | Shock sensors for control rod |
| CN106679858A (en) * | 2017-02-08 | 2017-05-17 | 厦门红雏鹰科技有限公司 | Self-closing self-protective pressure and tension sensor |
| CN107144330A (en) * | 2017-05-24 | 2017-09-08 | 深圳市靖洲科技有限公司 | A kind of dynamic electron miniature self-service car weighing apparatus of diplopore cantilever beam foil gauge |
| CN110726388A (en) * | 2019-10-25 | 2020-01-24 | 中互电气(江苏)有限公司 | Sensor with error detection function |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2436373A1 (en) * | 1978-09-15 | 1980-04-11 | Pesage Promotion | Weighing machine using dual guided cantilever beams - has two strain elements and compensates for loading torsion arising from non-axial effects |
| US4338825A (en) * | 1980-10-15 | 1982-07-13 | Eaton Corporation | Strain gage load cell |
| US4361199A (en) * | 1980-07-01 | 1982-11-30 | Gse, Inc. | Overload protection for a weigh scale having a flexure beam |
| JPS5984120A (en) * | 1982-11-06 | 1984-05-15 | Hitachi Koki Co Ltd | Apparatus for protecting weight detector |
| US4726435A (en) * | 1985-05-16 | 1988-02-23 | Tokyo Electric Co., Ltd. | Load cell weighing apparatus |
| CN2059237U (en) * | 1989-10-16 | 1990-07-11 | 胡治平 | Double face digit display electronic steelyard |
| CN2068675U (en) * | 1989-08-30 | 1991-01-02 | 朱觉锦 | Anti-overload weighing sensor |
| US5050693A (en) * | 1987-09-30 | 1991-09-24 | Wirth Gallo Messtechnik Ag | Balance and process for calibrating and operating the balance |
| CN2205000Y (en) * | 1994-06-16 | 1995-08-09 | 杨森平 | Weighing sensor with overload protector |
| US5604336A (en) * | 1995-03-08 | 1997-02-18 | Weigh-Tronix, Inc. | Load cell with composite end beams having portions with different elastic modulus |
-
2005
- 2005-10-14 CN CNB2005100948236A patent/CN100357716C/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2436373A1 (en) * | 1978-09-15 | 1980-04-11 | Pesage Promotion | Weighing machine using dual guided cantilever beams - has two strain elements and compensates for loading torsion arising from non-axial effects |
| US4361199A (en) * | 1980-07-01 | 1982-11-30 | Gse, Inc. | Overload protection for a weigh scale having a flexure beam |
| US4338825A (en) * | 1980-10-15 | 1982-07-13 | Eaton Corporation | Strain gage load cell |
| JPS5984120A (en) * | 1982-11-06 | 1984-05-15 | Hitachi Koki Co Ltd | Apparatus for protecting weight detector |
| US4726435A (en) * | 1985-05-16 | 1988-02-23 | Tokyo Electric Co., Ltd. | Load cell weighing apparatus |
| US5050693A (en) * | 1987-09-30 | 1991-09-24 | Wirth Gallo Messtechnik Ag | Balance and process for calibrating and operating the balance |
| CN2068675U (en) * | 1989-08-30 | 1991-01-02 | 朱觉锦 | Anti-overload weighing sensor |
| CN2059237U (en) * | 1989-10-16 | 1990-07-11 | 胡治平 | Double face digit display electronic steelyard |
| CN2205000Y (en) * | 1994-06-16 | 1995-08-09 | 杨森平 | Weighing sensor with overload protector |
| US5604336A (en) * | 1995-03-08 | 1997-02-18 | Weigh-Tronix, Inc. | Load cell with composite end beams having portions with different elastic modulus |
Non-Patent Citations (1)
| Title |
|---|
| 传感器的过载保护 夏仁华.衡器，第28卷第1期 1999 * |
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|---|---|
| CN1746635A (en) | 2006-03-15 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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Granted publication date: 20071226 Termination date: 20121014 |