CN215447749U - Bolt corner detection device based on plane hall device - Google Patents
Bolt corner detection device based on plane hall device Download PDFInfo
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- CN215447749U CN215447749U CN202121809615.0U CN202121809615U CN215447749U CN 215447749 U CN215447749 U CN 215447749U CN 202121809615 U CN202121809615 U CN 202121809615U CN 215447749 U CN215447749 U CN 215447749U
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- hall sensor
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Abstract
The utility model discloses a bolt corner detection device based on a planar Hall device, which comprises a magnet part and a sensing part, wherein the sensing part is sleeved outside a nut, and the magnet part is fixed with the end face of a bolt; the sensing part receives the magnetic signal sent by the magnet part through the plane Hall sensor, generates angle information and sends the angle information to an external Internet of things system. The utility model has the beneficial effects that: the relative rotation angle between the bolt and the nut is monitored in real time by arranging the non-contact planar Hall sensor, so that an angle change value with extremely high precision can be obtained; and send to outside thing networking system through the bus, monitoring effect is good, and the real-time is high.
Description
Technical Field
The utility model relates to the technical field of monitoring devices of the Internet of things, in particular to a bolt corner detection device based on a planar Hall device.
Background
The fastener is used in various equipment, is one of key parts for reliable operation of the equipment, is loosened due to various reasons, and then causes serious accidents of the whole equipment, and has great loss. Therefore, during maintenance for equipment, it is necessary to monitor the use of fasteners on a high frequency and continuous basis. Bolt fastening is a common fastening method and is widely used in infrastructure, engineering industry equipment, vehicles, ships and aircrafts. Therefore, the bolt tightening is very important for the proper operation of the equipment, and it is necessary to take special monitoring of this type of fastener and to replace it in time when the bolt is loose.
The prior art lacks a device for monitoring the fastener, and often depends on manual inspection, including methods such as knocking, visual inspection, identification inspection and the like. The conventional monitoring process of the method is often rough and inaccurate, cannot well monitor the accumulated looseness in time for a long time, and needs a large amount of manpower. Manual monitoring of such fasteners in special situations, such as special work environments, special weather, and underwater environments, is also extremely difficult.
Disclosure of Invention
Aiming at the problems in the prior art, the bolt corner detection device based on the planar Hall device is provided.
The specific technical scheme is as follows:
a bolt corner detection device based on a planar Hall device comprises a magnet part and a sensing part, wherein the sensing part is sleeved outside a nut, and the magnet part is fixed with the end face of a bolt;
the sensing part is in signal connection with an external Internet of things system and used for sending the rotation angle of the bolt.
Preferably, the magnet part includes:
the connecting seat is of a sleeve structure and is sleeved on the screw part of the bolt;
the magnet is arranged on the upper surface of the connecting seat in parallel;
the N pole and the S pole of the magnet are distributed at two ends of the magnet in the direction parallel to the upper surface of the connecting seat.
Preferably, the sensing part includes:
the fixing device is fixedly connected with the outer side of the nut;
a housing is arranged above the fixing device, and the housing comprises:
the planar Hall sensor is arranged at the bottom of the shell, and the sensing direction of the planar Hall sensor points downwards to the magnet part;
the processing module is connected with the planar Hall sensor;
and the bus module is connected with the processing module and the external Internet of things system.
Preferably, the housing further comprises:
the temperature sensor is arranged at the bottom of the shell and points to the bolt;
the processing module is in signal connection with the temperature sensor.
Preferably, the fixing device is of a hoop structure;
the hoop structure is long-strip-shaped, and extends to the outer side of the nut from two sides of the shell and is held on two sides of the nut.
Preferably, the housing is a cube having an interface on a side thereof for connecting the bus module with the external internet of things system.
Preferably, the distance between the planar Hall sensor and the magnet is 0.5-1 mm.
Preferably, the height of the fixing means is 75-125 mm.
Preferably, the height of the housing is 25 mm.
Preferably, the connecting base is internally provided with M42X2.5 threads.
The technical scheme has the following advantages or beneficial effects: the relative rotation angle between the bolt and the nut is monitored in real time by arranging the non-contact planar Hall sensor, so that an angle change value with extremely high precision can be obtained; and send to outside thing networking system through the bus, monitoring effect is good, and the real-time is high.
Drawings
Embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings. The drawings are, however, to be regarded as illustrative and explanatory only and are not restrictive of the scope of the utility model.
FIG. 1 is an overall schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of a magnet portion of an embodiment of the present invention;
FIG. 3 is a front view of a sensing portion according to an embodiment of the present invention;
FIG. 4 is a side view of a sensing portion of an embodiment of the present invention;
FIG. 5 is a block diagram of a sensing portion according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a planar hall sensor according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The utility model is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
The utility model comprises the following steps:
a bolt corner detection device based on a planar Hall device is shown in figure 1 and comprises a magnet part 1 and a sensing part 2, wherein the sensing part 2 is sleeved outside a nut, and the magnet part 1 is fixed with the end face of a bolt;
the sensing part 2 receives the magnetic signal sent by the magnet part 1 through the planar hall sensor 221 and generates angle information to be sent to an external internet of things system.
Specifically, when the bolt is loosened, the relative angle between the bolt and the nut may be changed, thereby driving the magnet portion 1 to rotate. When the magnet part 1 rotates, the direction of the magnetic field generated by the magnet part changes, so that the direction of the magnetic field measured by the planar hall sensor 221 changes, and the rotation angle of the bolt is obtained and an angle signal is generated and sent to an external internet of things system.
In a preferred embodiment, the magnet portion 1 comprises:
the connecting seat 11 is of a sleeve structure, and the connecting seat 11 is sleeved on a screw rod part of a bolt;
the outer diameter of the connecting seat 11 is smaller than the diameter of the nut;
the magnet 12 is arranged on the upper surface of the connecting seat 11 in parallel;
the N pole and the S pole of the magnet 12 are distributed at two ends of the magnet 12 in the direction parallel to the connecting base 11.
Specifically, the planar hall sensor 221 can effectively detect the magnetic flux density coplanar with the chip surface, and the direction of the magnetic field generated by the magnet 12 can be parallel to the chip surface by setting the magnet 12 as a radially magnetized magnet, so as to accurately measure the direction of the magnetic field.
In one embodiment, the inner wall of the connecting base 11 is threaded with M42X4.5 standard threads for screwing on the bolt. The thread specification of the inner wall of the connecting seat 11 can be adaptively adjusted according to the bolt to be adapted.
In a preferred embodiment, the sensing part 2 comprises:
the fixing device 21 is fixedly connected with the outer side of the nut;
above the fixing device 21, a casing 22 is provided, in which casing 22:
a planar hall sensor 221 disposed at the bottom of the housing 22, a sensing direction of the planar hall sensor 221 pointing downward to the magnet portion 1;
the processing module 222, the processing module 222 is connected to the planar hall sensor 221 and acquires and processes the angle signal output by the planar hall sensor 221;
and the bus module 224 is connected with the processing module 222 and the external internet of things system, and sends the angle signal processed by the processing module 222 to the external internet of things system.
Specifically, the processing module 222 receives an angle signal output by the planar hall sensor 221, processes the angle signal to obtain a current angle of the bolt, and then sends the current angle to the external internet of things system through the bus module 224. The change of the angle of the bolt can be observed by continuously counting the current angle of the bolt, and then whether the bolt is loosened or not is judged by an external Internet of things system, and whether the looseness is larger than a safety limit value or not is judged.
Further, the information sent by the bus module 224 may include angle information of the bolt, a number and a position of the bolt, and a label of the bolt, and is sent to an external internet of things system through one of the internet of things buses such as RS485, RS232, CAN, and the like. The external Internet of things system can generate an angle change curve of the bolt according to the counted bolt angle information, and timely sends corresponding alarm information to an operation and maintenance unit when the loosening condition of the bolt deviates from a safe limit value, so that the operation and maintenance personnel are informed to timely go to the bolt loosening position to timely reinforce or replace the bolt.
In a preferred embodiment, the housing 22 is a cube having a length of 67 mm, a width of 60 mm, and a height of 25 mm. The upper surface of the housing 22 is a removable upper cover, and the upper cover is fixed on the housing 22 through screws, so that the upper cover can be removed to replace the whole or part of the upper cover when the planar hall sensor 221, the processing module 222 and the bus module 224 have faults, and the convenience of maintenance is improved.
In a preferred embodiment, the housing 22 further comprises:
a temperature sensor 223, the temperature sensor 223 being disposed at the bottom of the housing 22 and outputting a temperature signal;
the processing module 222 calibrates the angle signal according to the temperature signal.
Specifically, in an industrial environment, the environmental temperature changes greatly, and often reaches-40 to 125 ℃. When the temperature changes, the magnetic field intensity generated by the magnet 12 changes to some extent, and the accuracy of the angle calculation is affected. The temperature sensor 223 is arranged and pointed to the magnet 12 mounted on the bolt, so that the ambient temperature of the magnet 12 can be effectively measured, temperature data for temperature compensation is provided for the processing module 222, and the processing module 222 can calculate more accurate angle data through a temperature compensation algorithm.
In a preferred embodiment, the fixing means 21 is of a clip structure;
the band structure is long, and extends to the outside of nut and holds in the both sides of nut from the both sides of casing 22.
In a preferred embodiment, the band structure is an elongated structure with a width of 35 mm and a length of 100 mm, and the thickness thereof can be set to any value between 0.01 mm and 100 mm according to the required working environment, the required size of the nut to be held and the clamping force.
In a preferred embodiment, the clip structure is secured to both sides of the housing 22 by two or more securing devices. The fastening means may be rivets, screws, bolts or other connectors.
In a preferred embodiment, the housing 22 is a cube having an interface 225 on a side thereof, the interface 225 for connecting the bus module 224 to an external internet of things system.
Specifically, the side of the housing 22 has a convenient fitting, which may be a round, rectangular fitting with threads, bayonet or a sealing rubber ring. Better connection effect can be realized through setting up convenient joint, and the maintainer of being convenient for is on the bolt has installed casing 22 the back again with external line connection to casing 22. This arrangement effectively avoids the problems of difficult installation and wire interference caused by the connecting wires extending from the housing 22, which are common in the prior art.
In a preferred embodiment, the planar hall sensor 221 is spaced 0.5-1mm from the magnet 12.
In particular, the better sensing effect can be obtained by setting the distance between the planar hall sensor 221 and the magnet 12 to 0.5-1 mm.
In a preferred embodiment, the height of the fixture 21 is 75-125 mm.
In a preferred embodiment, the planar hall sensor 221 comprises:
a first magnetic flux sensing unit 2211 for sensing a first magnetic flux in a first direction parallel to the planar hall sensor 221;
a second magnetic flux sensing unit 2212 for sensing a second magnetic flux in a second direction parallel to the planar hall sensor 221;
the operation means 2213, and the operation means 2213 calculates the angle signal from the first magnetic flux and the second magnetic flux.
In a preferred embodiment, the first direction is perpendicular to the second direction.
Specifically, the planar hall sensor 221 senses a first magnetic flux in the X-axis direction and a second magnetic flux in the Y-axis direction through the first and second magnetic flux sensing units 2211 and 2212, respectively, and generates a first voltage v according to the generated first voltage vxAnd a second voltage vyAnd formulas
And calculating to obtain the angle.
The utility model has the beneficial effects that: the relative rotation angle between the bolt and the nut is monitored in real time by arranging the non-contact planar Hall sensor, so that an angle change value with extremely high precision can be obtained; and send to outside thing networking system through the bus, monitoring effect is good, and the real-time is high.
While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model.
Claims (10)
1. The bolt corner detection device based on the planar Hall device is characterized by comprising a magnet part and a sensing part, wherein the sensing part is sleeved outside a nut, and the magnet part is fixed with the end face of a bolt;
the sensing part is in signal connection with an external Internet of things system and used for sending the rotation angle of the bolt.
2. The detection device according to claim 1, wherein the magnet portion includes:
the connecting seat is of a sleeve structure and is sleeved on the screw part of the bolt;
the magnet is arranged on the upper surface of the connecting seat in parallel;
the N pole and the S pole of the magnet are distributed at two ends of the magnet in the direction parallel to the upper surface of the connecting seat.
3. The detection device according to claim 1, wherein the sensing portion includes:
the fixing device is fixedly connected with the outer side of the nut;
a housing is arranged above the fixing device, and the housing comprises:
the planar Hall sensor is arranged at the bottom of the shell, and the sensing direction of the planar Hall sensor points downwards to the magnet part;
the processing module is connected with the planar Hall sensor;
and the bus module is connected with the processing module and the external Internet of things system.
4. The sensing device of claim 3, further comprising in the housing:
the temperature sensor is arranged at the bottom of the shell and points to the bolt;
the processing module is in signal connection with the temperature sensor.
5. The test device of claim 3, wherein the securing means is a clip structure;
the hoop structure is long-strip-shaped, and extends to the outer side of the nut from two sides of the shell and is held on two sides of the nut.
6. The detection device as claimed in claim 3, wherein the housing is a cube having an interface on a side thereof for connecting the bus module with the external Internet of things system.
7. The detecting device for detecting the rotation of a motor rotor according to the claim 1, wherein the distance between the planar Hall sensor and the magnet is 0.5-1 mm.
8. A test device as claimed in claim 5 wherein the height of the fixture is 75-125 mm.
9. A testing device according to claim 3 wherein the height of the housing is 25 mm.
10. The detecting device for detecting the rotation of a motor rotor as claimed in claim 2, wherein the connecting seat is internally provided with M42X2.5 threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121809615.0U CN215447749U (en) | 2021-08-04 | 2021-08-04 | Bolt corner detection device based on plane hall device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121809615.0U CN215447749U (en) | 2021-08-04 | 2021-08-04 | Bolt corner detection device based on plane hall device |
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| Publication Number | Publication Date |
|---|---|
| CN215447749U true CN215447749U (en) | 2022-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121809615.0U Active CN215447749U (en) | 2021-08-04 | 2021-08-04 | Bolt corner detection device based on plane hall device |
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| Country | Link |
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| CN (1) | CN215447749U (en) |
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2021
- 2021-08-04 CN CN202121809615.0U patent/CN215447749U/en active Active
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