CN217845470U - Bolt fastening force monitoring device - Google Patents
Bolt fastening force monitoring device Download PDFInfo
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- CN217845470U CN217845470U CN202221399355.9U CN202221399355U CN217845470U CN 217845470 U CN217845470 U CN 217845470U CN 202221399355 U CN202221399355 U CN 202221399355U CN 217845470 U CN217845470 U CN 217845470U
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Abstract
The utility model discloses a bolt-up power monitoring devices for monitor bolt-up power, including main part and module part, the main part with the module part is connected, its the main part includes elastomer, foil gage, first shell, PCB board and lower electric conductor, the elastomer the foil gage the PCB board with place in the electric conductor is all in the first shell, the centre of first shell is equipped with the bolt and places the region. The utility model discloses a bolt-up power monitoring devices adopts the design of loop configuration to realize that a large amount of journey is measured on the basis that the device is miniaturized, adopts the bidirectional distribution of foil gage to realize temperature compensation and then realize high accuracy measurement and solve the eccentric problem of bolt, adopts the module part design of removable battery and antenna to realize long-term non-maintaining operation.
Description
Technical Field
The utility model belongs to the technical field of bolt-up power monitoring, concretely relates to bolt-up power monitoring devices.
Background
Bolted connections are a widely used form of structural connection, the quality of which directly affects the performance of equipment, facilities or buildings. If the bolt connection fails, potential safety hazards can be brought, and even accidents or disasters can be caused. Therefore, the bolt connection is ensured to be reliable, which is a problem that cannot be avoided in engineering. The bolt installation and inspection by the torque method can not meet the engineering requirements, particularly the connection part of the structure which needs regular inspection, the cycle efficiency of the manual wrench is low, the cost is high, and the evaluation on the connection quality can not be quantized.
In the existing method for monitoring the fastening force of bolt connection, a method for implanting a strain gauge into a bolt needs to punch a hole on the bolt, so that the strength of the bolt is influenced, and the method has high requirements on bolt preparation and is not suitable for large-scale engineering application. The monitoring of the rotation angle of the bolt can achieve qualitative evaluation effect, but the quantitative evaluation effect is poor. The ultrasonic wave and fiber grating method has high requirements on the preparation of the bolt, and has the problems of high cost, large error and the like.
Therefore, the mechanical sensor with the annular structure is adopted based on the strain type principle, the bolt fastening force is evaluated by measuring the pressure, and the method is a monitoring method which is mature in application and suitable for large-scale application. However, this method changes the bolt connection structure, and therefore, it is necessary to make the sensor as small as possible, to facilitate installation, and to have as little influence as possible on the original connection structure. Furthermore, this method needs to face the problem of eccentricity in bolt installation, and therefore more consideration is required in the layout of the strain gauge.
Therefore, the above problems are further improved.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a bolt-up power monitoring devices, adopt the loop configuration design to realize the wide range measurement on the basis of device miniaturization, adopt the bidirectional distribution of foil gage to realize temperature compensation and then realize high accuracy measurement and solve the eccentric problem of bolt, the module part design that adopts removable battery and antenna realizes long-term non-maintaining operation, solve the current bulky of bolt-up power monitoring devices, the range is little, the precision is low, and is with high costs, the poor scheduling problem of practicality, thereby realize the real-time intelligent on-line monitoring and the scale popularization and application of bolt-up power.
In order to achieve the above object, the utility model provides a bolt-up power monitoring devices for monitoring bolt-up power, including main part and module part, the main part with module part (can dismantle) connects, wherein:
the main body part comprises an elastic body (preferably in a ring shape), a strain gauge, a first shell, a PCB and a lower electric conductor, wherein the elastic body, the strain gauge, the PCB and the lower electric conductor are all arranged in the first shell, a bolt placement area (allowing a bolt to pass through for fastening force monitoring) is arranged in the middle of the first shell, the strain gauge is fixedly arranged on the elastic body and is electrically connected with the PCB, and the PCB is electrically connected with the lower electric conductor;
the module comprises a second shell, a battery, an antenna and an upper conductor, wherein the battery, the antenna and the upper conductor are all arranged in the second shell, the second shell is connected with the first shell, the battery and the antenna are respectively electrically connected with the upper conductor and the lower conductor (the battery is electrically connected with the PCB sequentially through the upper conductor and the lower conductor to supply power, and the PCB is connected with the antenna sequentially through the lower conductor and the upper conductor to remotely send monitoring data out).
As a further preferable technical solution of the above technical solution, planar areas are uniformly distributed on the outer periphery of the elastic body, and the strain gauge is fixedly mounted on the planar areas;
the strain gauge comprises a plurality of axial strain gauges and a plurality of circumferential strain gauges which are the same in number, and the axial strain gauges are not electrically connected with the circumferential strain gauges.
As a further preferable technical solution of the above technical solution, the axial strain gauge and the axial strain gauge are electrically connected and are electrically connected with the PCB after being connected in series with each other;
the circumferential strain gauge and the circumferential strain gauge are electrically connected and are electrically connected with the PCB after being mutually connected in series.
In a more preferable embodiment of the above aspect, the strain gauge is insulated from the first case, the PCB is insulated from the first case, and the lower conductor is insulated from the first case
As a further preferable technical solution of the above technical solution, the first housing is provided with a first through hole, the second housing is provided with a second through hole, and the lower conductor is electrically connected to the upper conductor sequentially through the first through hole and the second through hole.
The beneficial effects of the utility model reside in that:
compared with the prior art, the utility model discloses can solve bolt-up power monitoring devices current bulky, the range is little, the precision is low, the practicality subalternation problem to realize the real-time intelligent on-line monitoring of bolt-up power. The specific technology comprises the steps of adopting an annular structure design to realize wide-range measurement on the basis of device miniaturization, adopting the bidirectional distribution of strain gauges to realize temperature compensation and further realize high-precision measurement and solve the problem of bolt eccentricity, and adopting the module design of replaceable batteries and antennas to realize long-term maintenance-free operation.
Drawings
Fig. 1 is the structural schematic diagram of the bolt fastening force monitoring device of the present invention.
Fig. 2A is a schematic structural diagram of a module part of a bolt fastening force monitoring device according to the present invention.
Fig. 2B is a schematic structural diagram of a main body of the bolt fastening force monitoring device of the present invention.
Fig. 3A is a cross-sectional view of the utility model discloses a bolt-up force monitoring devices.
Fig. 3B is a schematic structural diagram of the elastic body of the bolt fastening force monitoring apparatus of the present invention.
The reference numerals include: 100. a body portion; 110. an elastomer; 111. a planar region; 120. a strain gauge; 121. an axial strain gage; 122. a circumferential strain gage; 130. a first housing; 131. a bolt placement area; 132. a first through hole; 140. a PCB board; 150. a lower conductor 200, a module portion; 210. a second housing; 211. a second through hole; 220. a battery; 230. an antenna; 240. and an upper conductor.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments described below are by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.
The utility model discloses a bolt-up power monitoring devices combines preferred embodiment below, makes further description to utility model's concrete embodiment.
In the embodiments of the present invention, those skilled in the art will note that the bolts and the like of the present invention can be regarded as the prior art.
Preferred embodiments.
The utility model discloses a bolt-up power monitoring devices for monitoring bolt-up power, including main part 100 and module part 200, main part 100 with module part 200 (can dismantle) is connected, wherein:
the main body part 100 comprises an elastic body 110 (preferably in a ring shape), a strain gauge 120, a first shell 130, a PCB 140 and a lower conductor 150, wherein the elastic body 110, the strain gauge 120, the PCB 140 and the lower conductor 150 are all arranged in the first shell 130, a bolt placing area 131 (allowing a bolt to pass through for fastening force monitoring) is arranged in the middle of the first shell 130, the strain gauge 120 is fixedly arranged on the elastic body 110 and is electrically connected with the PCB 140, and the PCB 140 is electrically connected with the lower conductor 150;
the module part 200 includes a second housing 210, a battery 220, an antenna 230 and an upper conductor 240, the battery 220, the antenna 230 and the upper conductor 240 are all built in the second housing 210 and the second housing 210 is connected with the first housing 130, the battery 220 and the antenna 230 are respectively electrically connected with the upper conductor 240 and the lower conductor 150 (the battery is electrically connected with the PCB board sequentially through the upper conductor and the lower conductor to supply power, and the PCB board is connected with the antenna sequentially through the lower conductor and the upper conductor to remotely send out monitoring data).
Specifically, the outer circumference of the elastic body 110 is uniformly distributed with planar areas 111, and the strain gauge 120 is fixedly mounted on the planar areas 111;
the strain gauge 120 includes a plurality of axial strain gauges 121 and circumferential strain gauges 122, which are equal in number, and the axial strain gauges 121 and the circumferential strain gauges 122 are not electrically connected.
More specifically, the axial strain gauge 121 and the axial strain gauge 121 are electrically connected in series and then electrically connected to the PCB 140;
the circumferential strain gauges 122 and the circumferential strain gauges 122 are electrically connected in series and then electrically connected to the PCB 140.
Further, the strain gauge 120 is insulated from the first case 130, the PCB 140 is insulated from the first case 130, and the lower conductor 150 is insulated from the first case 130.
Furthermore, the first housing 130 is provided with a first through hole 132, the second housing 210 is provided with a second through hole 211, and the lower conductor 150 is electrically connected to the upper conductor 240 sequentially through the first through hole 132 and the second through hole 211.
Further, the body portion 100 is used for measurement and support mounting functions.
Further, the module portion 200 is used to implement functions of power supply and wireless communication.
Elastomers have a high load bearing capacity.
Further, the elastic body 110 is an annular structure, the inner diameter of the elastic body 110 is not larger than the inner diameter of the flat cushion with the corresponding specification, and the outer diameter of the elastic body 110 is not smaller than the outer diameter of the flat cushion with the corresponding specification.
Further, the elastic body 110 is made of a metal material having high elasticity.
Further, the elastic body 110 includes a planar area 111, and the planar area 111 is uniformly distributed on the circumference for attaching the strain gauge 120.
Preferably, the number of the planar regions 111 is an even number of 4 or more.
Preferably, the axial strain gauge 121 and the circumferential strain gauge 122 are strain gauges of the same specification.
Preferably, the number of the axial strain gauges 121 and the circumferential strain gauges 122 adhered to the elastic body 110 is the same.
The axial strain gauge is electrically connected with the PCB, and the circumferential strain gauge is electrically connected with the PCB.
Furthermore, a plurality of axial strain gauges are arranged, and after the axial strain gauges are connected in series with each other, the axial strain gauges are electrically connected with the PCB through a lead.
The resistance value of the axial strain gauge changes, and the PCB can receive and convert signals and send data in a wireless mode.
Furthermore, a plurality of circumferential strain gauges are arranged, and after the circumferential strain gauges are connected in series, the circumferential strain gauges are electrically connected with the PCB through a lead.
The resistance value of the circumferential strain gauge changes, and the PCB can receive and convert signals and send data in a wireless mode.
The first shell has good sealing performance and weather resistance and can encapsulate the elastomer, the strain gauge and the PCB.
Further, the first shell is made of a metal material or weather-resistant engineering plastic.
Furthermore, the first shell is made of a conductive material, the strain gauge is insulated from the first shell, and the PCB is insulated from the first shell.
The lower conductor is electrically connected to the PCB.
Further, the lower conductor and the PCB are electrically connected through a wire or welding.
Furthermore, the first shell is made of a conductive material, and the lower conductor is insulated from the first shell.
The second housing has good sealability and weather resistance, and can encapsulate the battery and the antenna.
Further, the second shell is made of a metal material or weather-resistant engineering plastic.
The upper conductor is electrically connected to the battery and the upper conductor is electrically connected to the antenna.
Further, the upper conductor and the battery are electrically connected through a lead or welding, and the upper conductor and the antenna are electrically connected through a lead or welding.
Furthermore, in order to ensure the using effect of the antenna, the antenna and the battery keep a certain physical space distance.
The lower conductor and the upper conductor make an electrical connection.
Further, the lower conductor and the upper conductor are electrically connected by being in contact with each other.
The battery is electrically connected with the PCB through the upper conductor and the lower conductor to supply power for the PCB.
The antenna is electrically connected with the PCB through the upper conductor and the lower conductor, so that the transmission of wireless signals is realized.
The lower conductor is fixed on the first shell, and the upper conductor is fixed on the second shell.
Furthermore, the fixing mode comprises welding, riveting, embedding, bolt connection and gluing.
The principle of the utility model is that:
when the elastic body is deformed by the pressure of the bolt, the resistance value of the strain gauge is changed. Under the same pressure action, the variable quantity of the axial strain gauge is larger than that of the circumferential strain gauge, the PCB feels resistance change signals, and the signals are converted and analyzed and then transmitted to the outside wirelessly through the lower conductor and the upper conductor and finally through the antenna.
When the environmental temperature changes, the resistance variation of the axial strain gauge and the circumferential strain gauge which are stuck on the elastic body is the same, so that the change of an electric signal cannot be caused, and the temperature compensation of the device is realized (the grids of the existing strain gauges are distributed along a single direction and are arranged in a strain sensitive area, so that the maximum strain variation is obtained when the strain is applied.
The battery supplies power to the PCB continuously and uninterruptedly through the upper conductor and the lower conductor.
After the battery power is exhausted or the module part is damaged, the original module part can be detached and the brand new module part is assembled, the main body part does not need to be replaced synchronously, the bolt connecting structure does not need to be detached and installed, and the safety and the economical efficiency are improved.
It is worth mentioning that the technical features such as the bolt that the utility model discloses a patent application relates to should be regarded as prior art, and the concrete structure of these technical features, theory of operation and the control mode that may involve, spatial arrangement mode adopt the conventional selection in this field can, should not be regarded as the invention point of the utility model discloses a do not do further specifically expand the detailed description.
It will be apparent to those skilled in the art that modifications and variations can be made in the above-described embodiments, or some features of the invention may be substituted or omitted, and any modification, substitution, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (5)
1. A bolt-fastening-force monitoring device for monitoring bolt-fastening force, characterized by comprising a main body portion and a module portion, the main body portion and the module portion being connected, wherein:
the main body part comprises an elastic body, a strain gauge, a first shell, a PCB and a lower electric conductor, wherein the elastic body, the strain gauge, the PCB and the lower electric conductor are all arranged in the first shell, a bolt placing area is arranged in the middle of the first shell, the strain gauge is fixedly arranged on the elastic body and is electrically connected with the PCB, and the PCB is electrically connected with the lower electric conductor;
the module part comprises a second shell, a battery, an antenna and an upper conductor, wherein the battery, the antenna and the upper conductor are all arranged in the second shell, the second shell is connected with the first shell, and the battery and the antenna are respectively electrically connected with the upper conductor and the upper conductor is electrically connected with the lower conductor.
2. The bolt-fastening force monitoring device according to claim 1, wherein planar areas are uniformly distributed around the outer periphery of the elastic body, and the strain gauges are fixedly mounted on the planar areas;
the strain gauge comprises a plurality of axial strain gauges and circumferential strain gauges which are the same in number, and the axial strain gauges are not electrically connected with the circumferential strain gauges.
3. The bolt-fastening force monitoring device of claim 2, wherein the axial strain gauge and the axial strain gauge are electrically connected and serially connected with each other and electrically connected with the PCB;
the circumferential strain gauges are electrically connected with the PCB after being connected in series.
4. The bolt-fastening force monitoring device of claim 3, wherein the strain gauge is insulated from the first housing, the PCB is insulated from the first housing, and the lower conductor is insulated from the first housing.
5. The bolt-fastening force monitoring device according to claim 4, wherein the first housing is provided with a first through hole, the second housing is provided with a second through hole, and the lower conductor is electrically connected to the upper conductor sequentially through the first through hole and the second through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221399355.9U CN217845470U (en) | 2022-06-02 | 2022-06-02 | Bolt fastening force monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221399355.9U CN217845470U (en) | 2022-06-02 | 2022-06-02 | Bolt fastening force monitoring device |
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| Publication Number | Publication Date |
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| CN217845470U true CN217845470U (en) | 2022-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221399355.9U Active CN217845470U (en) | 2022-06-02 | 2022-06-02 | Bolt fastening force monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115031885A (en) * | 2022-06-02 | 2022-09-09 | 浙江维思无线网络技术有限公司 | Bolt fastening force monitoring device and monitoring method thereof |
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- 2022-06-02 CN CN202221399355.9U patent/CN217845470U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115031885A (en) * | 2022-06-02 | 2022-09-09 | 浙江维思无线网络技术有限公司 | Bolt fastening force monitoring device and monitoring method thereof |
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