CN112325757A - Differential transformer type elastomer sensor - Google Patents
Differential transformer type elastomer sensor Download PDFInfo
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- CN112325757A CN112325757A CN202011171762.XA CN202011171762A CN112325757A CN 112325757 A CN112325757 A CN 112325757A CN 202011171762 A CN202011171762 A CN 202011171762A CN 112325757 A CN112325757 A CN 112325757A
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- framework
- differential transformer
- spiral
- rigid framework
- coaxial
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention discloses a differential variable-voltage elastomer sensor which comprises a body, wherein an elastic framework is coaxially arranged in the body, the elastic framework comprises a rigid framework body, a spiral sheet-shaped elastomer is arranged in the middle of the rigid framework body, and the rigid framework body is provided with a through coaxial through hole; one end of the coaxial through hole is provided with an induction coil, and the other end of the coaxial through hole is in threaded connection with a measuring head which extends into the elastic framework from the outside of the body; a magnetic core is arranged in the coaxial through hole; one end of the magnetic core extends into the induction coil, and the other end of the magnetic core penetrates through the spiral sheet-shaped elastic body and is in threaded connection with the rigid framework body. The invention has an integrated structure, has simpler appearance, and is easy to process and assemble.
Description
Technical Field
The invention belongs to the field of linear measurement of various precise apertures, depths and center distances in machining, and particularly relates to a differential variable-pressure type elastomer sensor.
Background
In current portable plug gauge manufacturing process, the sensor that generally uses is split type sensor, and split type sensor both ends need have the bearing location, at intermediate position installation spring, still need set up location structure, have consequently caused the structure more complicated, need certain professional skill during the assembly to there is each subassembly and produces the motion easily and interfere and then produce displacement accumulative error when measuring work.
Disclosure of Invention
In view of the problems in the background art, an object of the present invention is to provide a differential transformer type elastomer sensor which is easy to assemble and has high measurement accuracy.
In order to achieve the above object, the present invention provides a differential transformer type elastomer sensor, comprising: the elastic body framework comprises a rigid framework body, wherein an elastic framework is coaxially arranged in the body, the middle part of the rigid framework body is a spiral sheet-shaped elastic body, and the rigid framework body is provided with a through coaxial through hole; one end of the coaxial through hole is provided with an induction coil, and the other end of the coaxial through hole is in threaded connection with a measuring head which extends into the elastic framework from the outside of the body; a magnetic core is arranged in the coaxial through hole; one end of the magnetic core extends into the induction coil, and the other end of the magnetic core penetrates through the spiral sheet-shaped elastic body and is in threaded connection with the rigid framework body.
Preferably, the thickness of the single section of the spiral flaky elastomer is 0.2-0.4 mm.
Preferably, the pitch of the spiral flaky elastomer is 1-1.5 mm.
Preferably, the helix angle of the helical sheet-like elastic body is 10 ° to 15 °.
Preferably, the diameter of the rigid skeleton body located above the spiral sheet-shaped elastic body is larger than the diameter of the remaining rigid skeleton body. Therefore, friction of the elastic framework during axial displacement can be avoided, and measurement accuracy is guaranteed.
Preferably, the fit clearance between the rigid skeleton body and the body above the spiral sheet-shaped elastic body is within 0.002 mm.
Preferably, the body is provided with a locking jackscrew which penetrates through the body and abuts against the outer wall of the rigid framework body above the spiral flaky elastic body.
Preferably, an axial straight groove is formed in the outer wall of the rigid framework body below the spiral sheet-shaped elastic body, and one end of the positioning jackscrew extends into the straight groove from the outer wall of the rigid framework body.
The invention has the beneficial effects that: the invention adopts the integral material to cut into the elastic framework, and the elastic framework generates axial displacement after being stressed, thereby causing the relative position change of the induction coil and the magnetic core, and determining the change of the displacement after the change of the generated electric signal is detected. The locking jackscrew is used for limiting the radial swinging freedom degree of the elastic framework and positioning the jackscrew to play a role in limiting and guiding, and the measurement precision of linear displacement is improved.
The invention has an integrated structure, has simpler appearance, and is easy to process and assemble.
Drawings
FIG. 1 is a schematic structural view of the present invention
In the figure: the device comprises a body 1, an elastic framework 2 (a rigid framework body 2.1, a spiral sheet-shaped elastic body 2.2, a coaxial through hole 2.3 and a straight groove 2.4), an induction coil 3, a measuring head 4, a magnetic core 5, a locking jackscrew 6 and a positioning jackscrew 7.
Detailed Description
The invention will now be described in further detail, including the preferred embodiments, by means of figure 1 and by way of a list of some alternative embodiments of the invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
As shown in fig. 1, the differential variable-voltage elastomer sensor designed by the invention comprises a body 1, wherein an elastic framework 2 is coaxially arranged in the body 1, the elastic framework comprises a rigid framework body 2.1, the middle part of the rigid framework body 2.1 is provided with a spiral sheet-shaped elastomer 2.2, and the rigid framework body 2.1 is provided with a through coaxial through hole 2.3; one end of the coaxial through hole 2.3 is provided with an induction coil 3, and the other end of the coaxial through hole is in threaded connection with a measuring head 4 which extends into the elastic framework 2 from the outside of the body 1; a magnetic core 5 is arranged in the coaxial through hole 2.3; one end of the magnetic core 5 extends into the induction coil 3, and the other end of the magnetic core penetrates through the spiral sheet-shaped elastic body 2.2 and is in threaded connection with the rigid framework body 2.1.
Preferably, the thickness of the single section of the spiral sheet-shaped elastic body 2.2 is 0.2-0.4 mm.
Preferably, the pitch of the spiral flaky elastic body 2.2 is 1-1.5 mm.
Preferably, the helix angle of the helical sheet-like elastic body 2.2 is 10 ° to 15 °.
Preferably, the diameter of the rigid skeletal body 2.1 located above the spiral sheet-like elastic body 2.2 is larger than the diameter of the remaining rigid skeletal body 2.2. Therefore, friction of the elastic framework during axial displacement can be avoided, and measurement accuracy is guaranteed.
Preferably, the fit clearance between the rigid skeletal body 2.1 and the body 1 above the spiral sheet-like elastic body 2.2 is within 0.002 mm. Can guarantee the axiality without the bearing, the essence has reduced equipment part, avoids producing the accumulative error, also makes the later stage assembly simpler.
Preferably, the body 1 is provided with a locking jackscrew 6, and the locking jackscrew 6 penetrates through the body 1 and abuts against the outer wall of the rigid framework body 2.1 above the spiral flaky elastic body 2.2.
Preferably, an axial straight groove 2.4 is arranged on the outer wall of the rigid framework body 2.1 below the spiral flaky elastic body 2.2, and one end of the positioning jackscrew 7 extends into the straight groove 2.4 from the outer wall of the body 1.
The invention adopts the spiral elastic framework with the section thickness of 0.2-0.4 mm, the thread pitch of 1-1.5 mm and the helix angle of 10-15 degrees to process the alloy integral cylinder material to install the induction coil and the iron core, and the axial displacement is generated after the stress of the elastic framework, thereby driving the induction coil and the iron core to generate the displacement change.
The invention adopts an integrated structure, so that the appearance is simpler, the assembly is simpler, the resolution can reach about 0.001mm, the repeated measurement precision is about 0.002mm, and the blank of the sensor is filled.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and any modification, combination, replacement, or improvement made within the spirit and principle of the present invention is included in the scope of the present invention.
Claims (8)
1. A differential transformer formula elastomer sensor which characterized in that: the elastic body framework comprises a rigid framework body, wherein an elastic framework is coaxially arranged in the body, the middle part of the rigid framework body is a spiral sheet-shaped elastic body, and the rigid framework body is provided with a through coaxial through hole; one end of the coaxial through hole is provided with an induction coil, and the other end of the coaxial through hole is in threaded connection with a measuring head which extends into the elastic framework from the outside of the body; a magnetic core is arranged in the coaxial through hole; one end of the magnetic core extends into the induction coil, and the other end of the magnetic core penetrates through the spiral sheet-shaped elastic body and is in threaded connection with the rigid framework body.
2. The differential transformer elastomer sensor of claim 1, wherein: the thickness of the section of the single piece of the spiral flaky elastic body is 0.2-0.4 mm.
3. The differential transformer elastomer sensor of claim 1, wherein: the thread pitch of the spiral flaky elastic body is 1-1.5 mm.
4. The differential transformer elastomer sensor of claim 1, wherein: the helix angle of the helical flaky elastomer is 10-15 degrees.
5. The differential transformer elastomer sensor according to any one of claims 1 to 4, wherein: the diameter of the rigid framework body above the spiral flaky elastic body is larger than that of the rest rigid framework bodies.
6. The differential transformer elastomer sensor of claim 5, wherein: the fit clearance between the rigid skeleton body above the spiral flaky elastic body and the body is within 0.002 mm.
7. The differential transformer elastomer sensor of claim 1, wherein: the body is provided with a locking jackscrew which penetrates through the body and abuts against the outer wall of the rigid framework body above the spiral flaky elastic body.
8. The differential transformer elastomer sensor of claim 1, wherein: an axial straight groove is formed in the outer wall of the rigid framework body below the spiral sheet-shaped elastic body, and one end of the positioning jackscrew extends into the straight groove from the outer wall of the rigid framework body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011171762.XA CN112325757A (en) | 2020-10-28 | 2020-10-28 | Differential transformer type elastomer sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011171762.XA CN112325757A (en) | 2020-10-28 | 2020-10-28 | Differential transformer type elastomer sensor |
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| Publication Number | Publication Date |
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| CN112325757A true CN112325757A (en) | 2021-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011171762.XA Pending CN112325757A (en) | 2020-10-28 | 2020-10-28 | Differential transformer type elastomer sensor |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2123751U (en) * | 1991-11-15 | 1992-12-02 | 水利水电科学研究院仪器研究所 | High-precision differential transformer displacement sensor |
| JPH05312863A (en) * | 1983-04-21 | 1993-11-26 | Wabco Westinghouse Fahrzeugbremsen Gmbh | Method of measuring inductance of induction sensor |
| CN201173754Y (en) * | 2008-03-11 | 2008-12-31 | 四川安好精工机械有限责任公司 | Precision electronic feeler gage |
| CN104697427A (en) * | 2014-12-12 | 2015-06-10 | 中国航空工业集团公司北京长城计量测试技术研究所 | Differential transformer type inductance displacement sensor composed of multiple coils |
| CN205120024U (en) * | 2015-11-18 | 2016-03-30 | 武汉理工大学 | Iron gallium alloy displacement sensor |
| CN105588508A (en) * | 2016-03-16 | 2016-05-18 | 上海筑邦测控科技有限公司 | Method for performing displacement measurement by using LVDT and sensor iron core mounting structure |
-
2020
- 2020-10-28 CN CN202011171762.XA patent/CN112325757A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05312863A (en) * | 1983-04-21 | 1993-11-26 | Wabco Westinghouse Fahrzeugbremsen Gmbh | Method of measuring inductance of induction sensor |
| CN2123751U (en) * | 1991-11-15 | 1992-12-02 | 水利水电科学研究院仪器研究所 | High-precision differential transformer displacement sensor |
| CN201173754Y (en) * | 2008-03-11 | 2008-12-31 | 四川安好精工机械有限责任公司 | Precision electronic feeler gage |
| CN104697427A (en) * | 2014-12-12 | 2015-06-10 | 中国航空工业集团公司北京长城计量测试技术研究所 | Differential transformer type inductance displacement sensor composed of multiple coils |
| CN205120024U (en) * | 2015-11-18 | 2016-03-30 | 武汉理工大学 | Iron gallium alloy displacement sensor |
| CN105588508A (en) * | 2016-03-16 | 2016-05-18 | 上海筑邦测控科技有限公司 | Method for performing displacement measurement by using LVDT and sensor iron core mounting structure |
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Effective date of registration: 20211118 Address after: 442022 No.20, Zhaojiagou community, TIYU Road, Zhangwan District, Shiyan City, Hubei Province Applicant after: DONGFENG EQUIPMENT MANUFACTURING Co.,Ltd. Applicant after: DONGFENG MOTER Co.,Ltd. Address before: 430056 No. 10 Dongfeng Avenue, Wuhan economic and Technological Development Zone, Wuhan, Hubei Applicant before: DONGFENG MOTER Co.,Ltd. |
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Application publication date: 20210205 |