CN203629737U - Bolt state monitoring sensor - Google Patents
Bolt state monitoring sensor Download PDFInfo
- Publication number
- CN203629737U CN203629737U CN201320861316.0U CN201320861316U CN203629737U CN 203629737 U CN203629737 U CN 203629737U CN 201320861316 U CN201320861316 U CN 201320861316U CN 203629737 U CN203629737 U CN 203629737U
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- ring groove
- annular
- gasket
- ring
- state monitoring
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Abstract
The utility model relates to a bolt state monitoring sensor. According to the technical scheme of the bolt state monitoring sensor, an upper washer (1) and a lower washer (7) are fixed together back to back through a left positioning pin (13) and a right positioning pin (14). A front face of the upper washer (1) is concentrically provided with a first annular groove, and a lead wire hole is processed between a circumferential face of the upper washer (1) and the first annular groove; and the bottom of the first annular groove is brushed with a first insulating layer (2), an upper plane and a lower plane of a first annular piezoelectric ceramic (4) are correspondingly pasted with a first upper electrode (5) and a first lower electrode (6) to made a first annular piezoelectric ceramic assembly pasted onto the first insulating layer (2) at the bottom of the first annular groove, a first insulating seal gum (3) is filled between the first annular piezoelectric ceramic assembly and the first annular groove, and an upper plane of the first annular piezoelectric assembly is coated with the first insulating seal gum (3). The specific embodiment has the advantages of strong versatility, simple structure, the long service life and low cost.
Description
Technical field
The utility model belongs to sensor technical field.Be specifically related to a kind of bolt state monitoring sensor.
Background technology
Bolt-connection is widely used in the various kinds of equipment and structure of the industries such as machinery, chemical industry, traffic, electric power, aviation and building, be used for connecting on the one hand detachable block, on the other hand for transmitting the load between parts, coupled situation shows as axial pretightening, and the size of its pretightning force is directly connected to reliability and the security of whole equipment or arrangement works.
The normal size that adopts dial torque wrench method control bolt clipping forcee in engineering, with resistance strain gage electrical measuring method measurement Axial stress in bolt.Dial torque wrench method, due to the uncertainty of the friction force existing between nut and parts and screw thread, is difficult to accurately measure and control the axial force of bolt; Resistance strain gage electrical measuring method adopts measuring resistance foil gauge, resistance strain gage is sticked on bolt, obtain the axial force of bolt by measuring bolt axial strain, though the method has higher measuring accuracy, but be subject to the restriction of bolt installation form and applying working condition, be difficult to be applied in a lot of bolts field of employment.
Summary of the invention
The utility model is intended to overcome prior art defect, and object is to provide a kind of highly versatile, the bolt state monitoring sensor that simple in structure, the life-span is long and cost is low.
In order to complete above-mentioned task, the technical solution adopted in the utility model is: described bolt state monitoring sensor is made up of Upper gasket and lower gasket, and Upper gasket and lower gasket are back-to-back fixed together by left register pin and right register pin.
Front at Upper gasket has the first ring groove concentrically, and the cross section of the first ring groove is rectangle, is processed with a fairlead between the periphery of Upper gasket and the first ring groove.The bottom of the first ring groove is brushed with the first insulation course, is pasted with accordingly the first top electrode and the first bottom electrode at upper plane and the lower plane of the first annular piezoelectric ceramics by conducting resinl, makes the first annular piezo ceramic element.Again the first annular piezo ceramic element is sticked on the first insulation course of the first annular trench bottom, between the first annular piezo ceramic element and the first ring groove, be filled with the first electric insulating sealant, have the first electric insulating sealant in the upper flat coating of the first annular piezo ceramic element.The first top electrode and the first bottom electrode are drawn from fairlead by lead-in wire separately.
Lower gasket is identical with Upper gasket.Front at lower gasket has the second ring groove concentrically, and the cross section of the second ring groove is rectangle, is processed with a fairlead between the periphery of lower gasket and the second ring groove.The bottom of the second ring groove is brushed with the second insulation course, is pasted with accordingly the second top electrode and the second bottom electrode at upper plane and the lower plane of the second ring piezoelectric pottery by conducting resinl, makes the second ring piezoelectric ceramic component.Again the second ring piezoelectric ceramic component is sticked on the second insulation course of the second ring groove bottom, between the second ring piezoelectric ceramic component and the second ring groove, be filled with the second electric insulating sealant, have the second electric insulating sealant in the upper flat coating of the second ring piezoelectric ceramic component.The second top electrode and the second bottom electrode are drawn from fairlead by lead-in wire separately.
The material of described the first top electrode, the first bottom electrode, the second top electrode and the second bottom electrode is Copper Foil.
The utility model, according to monitored bolt specification, is selected the bolt state monitoring sensor of suitable dimension, and bolt state monitoring sensor is arranged on bolt to be measured by general spacer for bolt.Using the first annular piezoelectric ceramics in Upper gasket as energizer, be that the voltage pulse signal of about 100KHz is to produce ultrasonic signal by the first annular piezoelectric ceramics being provided to centre frequency, the ultrasonic signal that the first annular piezoelectric ceramics produces passes to the second ring piezoelectric pottery in lower gasket by the interface between Upper gasket and lower gasket, the second ring piezoelectric pottery in lower gasket receives as receiver the ultrasonic signal that the first annular piezoelectric ceramics transmission comes, and the ultrasonic signal receiving is converted to voltage signal, voltage signal after conversion is by the second top electrode, the lead-in wire of the second bottom electrode accesses outside data acquisition system (DAS) and processes and show current pretightning force.
In the time that the pretightning force of bolt changes, Upper gasket connects interface characteristic with lower gasket will change, the characteristic parameter (mainly referring to amplitude and the energy of ultrasonic signal) of the ultrasonic signal that the second ring piezoelectric pottery receives also will change, and respective change also will occur the pretightning force finally being shown by the data acquisition system (DAS) being connected with the utility model.
The utility model can be made according to bolt specification the bolt state monitoring sensor of corresponding size; The utility model is assembled by several simple components, and structure full symmetric, is convenient to install; Core component piezoelectric ceramics of the present utility model stable performance, not fragile and cheap.
Therefore, the utlity model has highly versatile, the feature that simple in structure, the life-span is long and cost is low.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is further described, not the restriction to its protection domain:
A kind of bolt state monitoring sensor.Described bolt state monitoring sensor as shown in Figure 1, is made up of Upper gasket 1 and lower gasket 7, and Upper gasket 1 and lower gasket 7 are back-to-back fixed together by left register pin 13 and right register pin 14.
Front at Upper gasket 1 has the first ring groove concentrically, and the cross section of the first ring groove is rectangle, is processed with a fairlead between the periphery of Upper gasket 1 and the first ring groove.The bottom of the first ring groove is brushed with the first insulation course 2, is pasted with accordingly the first top electrode 5 and the first bottom electrode 6 at upper plane and the lower plane of the first annular piezoelectric ceramics 4 by conducting resinl, makes the first annular piezo ceramic element.Again the first annular piezo ceramic element is sticked on the first insulation course 2 of the first annular trench bottom, between the first annular piezo ceramic element and the first ring groove, be filled with the first electric insulating sealant 3, have the first electric insulating sealant 3 in the upper flat coating of the first annular piezo ceramic element.The first top electrode 5 and the first bottom electrode 6 are drawn from fairlead by lead-in wire separately.
The material of described the first top electrode 5, the first bottom electrode 6, the second top electrode 10 and the second bottom electrode 12 is Copper Foil.
This embodiment, according to monitored bolt specification, is selected the bolt state monitoring sensor of suitable dimension, and bolt state monitoring sensor is arranged on bolt to be measured by general spacer for bolt.Using the first annular piezoelectric ceramics 4 in Upper gasket 1 as energizer, be that the voltage pulse signal of about 100KHz is to produce ultrasonic signal by the first annular piezoelectric ceramics 4 being provided to centre frequency, the ultrasonic signal that the first annular piezoelectric ceramics 4 produces passes to the second ring piezoelectric pottery 11 in lower gasket 7 by the interface between Upper gasket 1 and lower gasket 7, the second ring piezoelectric pottery 11 in lower gasket 7 connects the first receipts ring piezoelectric pottery 4 as receiver and transmits the ultrasonic signal of coming, and the ultrasonic signal receiving is converted to voltage signal, voltage signal after conversion is by the second top electrode 10, the lead-in wire of the second bottom electrode 12 accesses outside data acquisition system (DAS) and processes and show current pretightning force.
In the time that the coupled situation of bolt changes, Upper gasket 1 connects interface characteristic with lower gasket 7 will change, the characteristic parameter (mainly referring to amplitude and the energy of ultrasonic signal) of the ultrasonic signal that ring piezoelectric pottery 11 receives also will change, and respective change also will occur the pretightning force finally being shown by the data acquisition system (DAS) being connected with this embodiment.
This embodiment can be made according to bolt specification the bolt state monitoring sensor of corresponding size; This embodiment is assembled by several simple components, and structure full symmetric, is convenient to install; The core component piezoelectric ceramics stable performance of this embodiment, not fragile and cheap.
Therefore, this embodiment has highly versatile, the feature that simple in structure, the life-span is long and cost is low.
Claims (2)
1. a bolt state monitoring sensor, it is characterized in that described bolt state monitoring sensor is made up of Upper gasket (1) and lower gasket (7), Upper gasket (1) and lower gasket (7) are back-to-back fixed together by left register pin (13) and right register pin (14);
Front at Upper gasket (1) has the first ring groove concentrically, and the cross section of the first ring groove is rectangle, is processed with a fairlead between the periphery of Upper gasket (1) and the first ring groove; The bottom of the first ring groove is brushed with the first insulation course (2), upper plane and lower plane at the first annular piezoelectric ceramics (4) are pasted with the first top electrode (5) and the first bottom electrode (6) accordingly by conducting resinl, make the first annular piezo ceramic element; Again the first annular piezo ceramic element is sticked on first insulation course (2) of the first annular trench bottom, between the first annular piezo ceramic element and the first ring groove, be filled with the first electric insulating sealant (3), have the first electric insulating sealant (3) in the upper flat coating of the first annular piezo ceramic element; The first top electrode (5) and the first bottom electrode (6) are drawn from fairlead by lead-in wire separately;
Lower gasket (7) is identical with Upper gasket (1); Front at lower gasket (7) has the second ring groove concentrically, and the cross section of the second ring groove is rectangle, is processed with a fairlead between the periphery of lower gasket (7) and the second ring groove; The bottom of the second ring groove is brushed with the second insulation course (8); Upper plane and lower plane at the second ring piezoelectric pottery (11) are pasted with the second top electrode (10) and the second bottom electrode (12) accordingly by conducting resinl, make the second ring piezoelectric ceramic component; Again the second ring piezoelectric ceramic component is sticked on second insulation course (8) of the second ring groove bottom, between the second ring piezoelectric ceramic component and the second ring groove, be filled with the second electric insulating sealant (9), have the second electric insulating sealant (9) in the upper flat coating of the second ring piezoelectric ceramic component; The second top electrode (10) and the second bottom electrode (12) are drawn from fairlead by lead-in wire separately.
2. bolt state monitoring sensor according to claim 1, is characterized in that the material of described the first top electrode (5), the first bottom electrode (6), the second top electrode (10) and the second bottom electrode (12) is Copper Foil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320861316.0U CN203629737U (en) | 2013-12-25 | 2013-12-25 | Bolt state monitoring sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320861316.0U CN203629737U (en) | 2013-12-25 | 2013-12-25 | Bolt state monitoring sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203629737U true CN203629737U (en) | 2014-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320861316.0U Withdrawn - After Issue CN203629737U (en) | 2013-12-25 | 2013-12-25 | Bolt state monitoring sensor |
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| Country | Link |
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| CN (1) | CN203629737U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103644997A (en) * | 2013-12-25 | 2014-03-19 | 武汉科技大学 | Piezoelectric intelligent material based bolt pre-tightening force sensor |
| CN107894445A (en) * | 2017-10-30 | 2018-04-10 | 江阴市恒润重工股份有限公司 | A kind of flange available for end face of flange crack monitoring |
| CN109612625A (en) * | 2019-01-03 | 2019-04-12 | 武汉科技大学 | A kind of Novel bolt axial force transducer |
| CN109813485A (en) * | 2019-01-08 | 2019-05-28 | 中国大唐集团新能源科学技术研究院有限公司 | Ultrasonic bolt pretightning force remote supervision system |
| CN114893492A (en) * | 2022-03-28 | 2022-08-12 | 南京理工大学 | Intelligent gasket for monitoring bolt pretightening force change in real time |
-
2013
- 2013-12-25 CN CN201320861316.0U patent/CN203629737U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103644997A (en) * | 2013-12-25 | 2014-03-19 | 武汉科技大学 | Piezoelectric intelligent material based bolt pre-tightening force sensor |
| CN103644997B (en) * | 2013-12-25 | 2015-12-23 | 武汉科技大学 | A kind of tools for bolts ' pretension force snesor based on piezoelectric intelligent material |
| CN107894445A (en) * | 2017-10-30 | 2018-04-10 | 江阴市恒润重工股份有限公司 | A kind of flange available for end face of flange crack monitoring |
| CN109612625A (en) * | 2019-01-03 | 2019-04-12 | 武汉科技大学 | A kind of Novel bolt axial force transducer |
| CN109813485A (en) * | 2019-01-08 | 2019-05-28 | 中国大唐集团新能源科学技术研究院有限公司 | Ultrasonic bolt pretightning force remote supervision system |
| CN114893492A (en) * | 2022-03-28 | 2022-08-12 | 南京理工大学 | Intelligent gasket for monitoring bolt pretightening force change in real time |
| CN114893492B (en) * | 2022-03-28 | 2023-08-11 | 南京理工大学 | A intelligent gasket for real-time supervision bolt pretightning force changes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140604 Effective date of abandoning: 20151223 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |