A stability signal probe arm for detecting

Abstract

The present invention relates to the field of detection technology, and specifically to a stability signal probe arm for detection, comprising a probe arm shell, and having the following beneficial effects: a primary telescopic protective cover slides on the probe arm shell, and a secondary sensor protective cover slides inside the primary telescopic protective cover, so that a sensor detection head is doubly protected; a small motor drives a threaded rod to rotate, so that the primary telescopic protective cover and a position sensing ring are extended as a whole; a position sensor on the position sensing ring can sense the contact position of the detected object, and feed back a signal to a control analysis module inside a processor module, and output a control signal again to control the small motor to stop so that the extended position of the primary telescopic protective cover is fixed; at the same time, the telescopic rod is controlled to work, so that the secondary sensor protective cover is completely pushed out from the first telescopic protective cover, so that the position of the sensor detection head is just in contact with the detected object, thereby ensuring a constant contact force between the detection head and the detected object.

Description

Technical Field

[0001] The invention belongs to the field of detection technology, and in particular relates to a stability signal detection arm for detection. Background Art

[0002] The detection arm, also often called a mechanical arm, robot arm or probe arm, is a highly flexible mechanical device widely used in many fields such as exploration, detection, sampling and operation. It is designed to perform complex and delicate tasks remotely or automatically, especially in environments that are difficult for people to reach or dangerous, such as safety inspections of urban underground pipeline integrated corridors or detection of tunnels and mines. The traditional inspection method is manual inspection, which has problems such as dangerous working environment, subjective inspection results and low inspection efficiency. If a robot is used to carry a detection arm to inspect the object to be detected, not only the detection efficiency is high, but also the result transmission is more accurate. However, it is difficult for the probe arm to keep the probe in full contact with the point to be detected during the detection process, resulting in unstable signal transmission and easy errors.

[0003] The existing Chinese patent document with publication number CN218446037U proposes a detection arm, in which a detection tube and a linear drive part for driving the detection tube to extend outward from the arm end of the detection arm are arranged, and a probe for starting the detection operation after abutting against the object to be detected is arranged at the tube end of the detection tube located outside the detection arm to solve the above-mentioned problem. However, after long-term use, the elastic part may fatigue or age, resulting in weakening of the elastic force, which affects the stability of the contact between the probe and the object to be detected.

[0004] Therefore, the present invention proposes a method to solve the problem in the prior art that when an elastic component is used to make the probe contact closely with the detection object, fatigue or aging of the elastic parts may occur, which may affect the stability of the contact between the probe and the detected object. A two-level telescopic protective shell assembly is provided, and a position sensing ring is used to monitor the contact position of the detection head. By extending the detection head again, a constant contact force is ensured between the detection head and the detection object, thereby ensuring the stability of the detection signal. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention aims to provide a stability signal detection arm for detecting, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a stability signal probe arm for detecting, comprising a probe arm shell, a rear end of the probe arm shell is fixedly installed with a rear closing plate by bolts, a rear side surface of the rear closing plate is provided with a connecting joint, a front front end of the probe arm shell is fixedly installed with a front closing ring, a first-level telescopic protective cover is slidably installed inside the probe arm shell, a position sensing ring is provided in front of the first-level telescopic protective cover, a second-level sensor protective cover is slidably installed inside the first-level telescopic protective cover, and a sensor detection head is fixedly installed inside the second-level sensor protective cover.

[0007] Preferably, a sealing blockage is fixedly installed on the inner surface of the front end of the secondary sensor protection cover, the inner surface of the sealing blockage is socketed with the outer surface of the sensor detection head, a signal amplifier and a filter are fixedly installed inside the secondary sensor protection cover, and a processor module is fixedly installed on the front surface of the rear closing plate.

[0008] Preferably, the output end of the sensor detection head is connected to the input end circuit of the signal amplifier, the output end of the signal amplifier is connected to the output end circuit of the filter, the output end of the filter is electrically connected to the input end of the processor module, and a communication module is provided at the front end of the processor module.

[0009] Preferably, a first-level limiting ring is fixedly installed on the front outer surface of the first-level telescopic protective cover, a sliding bracket is fixedly installed on the rear surface of the position sensing ring, a fixed connecting block is fixedly installed between the inner surface of the sliding bracket and the outer surface of the first-level telescopic protective cover, and the side wall of the probe arm housing is provided with a limiting sliding groove adapted to the fixed connecting block.

[0010] Preferably, a position sensor is fixedly installed on the front side of the position sensing coil, the output end of the position sensor is connected to the input end circuit of the processor module, and a rear mounting bracket is provided behind the first-level telescopic protective cover, and the rear mounting bracket is fixedly installed on the inner rear of the probe arm housing.

[0011] Preferably, a threaded rod is rotatably installed between the front surface of the rear mounting frame and the rear surface of the front closing ring, the inner wall of the fixed connecting block is threadedly connected to the outer surface of the threaded rod, and a small motor that drives the threaded rod to rotate is fixedly installed on the rear surface of the rear mounting frame, and the control input end of the small motor is connected to the control output end circuit of the processor module.

[0012] Preferably, a secondary limiting ring is fixedly installed on the inner surface of the front end of the first-level telescopic protective cover, a limiting slide rail is symmetrically fixedly installed on the front surface of the secondary limiting ring, a shielding cover mounting frame is fixedly installed on the front end of the limiting slide rail, a shielding cover is symmetrically rotatably installed on the inner side of the shielding cover mounting frame, and a gear is fixedly installed in the middle of the connection between the shielding cover and the shielding cover mounting frame.

[0013] Preferably, a third-level limiting ring is fixedly installed on the middle outer surface of the secondary sensor protection cover, an external fixing ring is fixedly installed on the outer surface of the third-level limiting ring, a sliding rod is symmetrically fixedly installed on the front surface of the external fixing ring, and a sliding hole adapted to the sliding rod is opened on the inner wall of the secondary limiting ring.

[0014] Preferably, a rack is fixedly mounted on the front end of the slide rod, the outer surface of the rack is slidably connected to the inner surface of the limiting slide rail, and the side surface of the rack is meshed with the outer surface of the gear.

[0015] Preferably, a telescopic rod is fixedly installed on one side of the inner surface of the first-level telescopic protective cover, the output end of the telescopic rod is fixedly connected to the rear surface of the third-level limiting ring, and the control input end of the telescopic rod is connected to the control output end circuit of the processor module.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The sensor detection head is doubly protected by the first-level telescopic protective cover sliding on the probe arm shell and the second-level sensor protective cover sliding inside the first-level telescopic protective cover. The small motor drives the threaded rod to rotate, so that the first-level telescopic protective cover and the position sensing ring are extended as a whole. The position sensor on the position sensing ring can sense the contact position of the detected object and feedback the signal to the control analysis module inside the processor module, which outputs the control signal again to control the small motor to stop so that the extended position of the first-level telescopic protective cover is fixed. At the same time, the telescopic rod is controlled to work and the second-level sensor protective cover is completely pushed out from the first-level telescopic protective cover, so that the position of the sensor detection head is just in contact with the detected object, ensuring a constant contact force between the detection head and the detected object, thereby ensuring the stability of the detection signal. This solves the problem in the prior art that the elastic component is used to make the probe closely contact the detected object, which may cause fatigue or aging of the elastic part, affecting the stability of the contact between the probe and the detected object. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the structure of the rear closing plate of the present invention being opened.

[0020] Figure 3It is a schematic diagram of the internal structure of the first-level telescopic protective cover of the present invention.

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of the first-level telescopic protective cover of the present invention.

[0022] Figure 5 It is a structural schematic diagram of the first-level telescopic protective cover of the present invention in an extended state.

[0023] Figure 6 It is a schematic diagram of the cross-sectional structure of the first-level telescopic protective cover of the present invention.

[0024] Figure 7 This is a structural schematic diagram of the secondary sensor protection cover of the present invention in an extended state.

[0025] Figure 8 This is a schematic diagram of the front structure of the secondary sensor protection cover of the present invention after it is extended.

[0026] Fig. 9 It is a schematic diagram of the overall cross-sectional structure of the secondary sensor protection cover after being extended.

[0027] Fig.10 It is a schematic structural diagram of the shielding cover of the present invention in a closed state.

[0028] Fig.11 It is a schematic diagram of the structure of the secondary sensor protection cover of the present invention.

[0029] Fig.12 It is a schematic diagram of the cross-sectional structure of the secondary sensor protection cover of the present invention.

[0030] In the figure: 1. probe arm housing; 11. rear closing plate; 12. front closing ring; 2. primary telescopic protective cover; 21. primary limiting ring; 22. sliding bracket; 221. fixed connecting block; 23. position sensing ring; 231. position sensor; 232. extruded elastic gasket; 2321. spring; 24. shielding cover mounting bracket; 241. shielding cover; 242. gear; 25. secondary limiting ring; 251. limiting slide rail; 26. telescopic rod; 27. rear mounting bracket; 271. threaded rod; 272. small motor; 3. secondary sensor protective cover; 31. tertiary limiting ring; 32. peripheral fixing ring; 321. slide rod; 322. rack; 33. sensor detection head; 34. sealing blockage; 35. signal amplifier; 36. filter; 37. processor module; 38. communication module. DETAILED DESCRIPTION

[0031] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Embodiment 1

[0033] See also Figures 1 to 12 The present invention provides a technical solution: comprising a probe arm housing 1, a rear end of the probe arm housing 1 is fixedly installed with a rear closing plate 11 by bolts, a rear side surface of the rear closing plate 11 is provided with a connecting joint, a front end of the probe arm housing 1 is fixedly installed with a front closing ring 12, a first-level telescopic protective cover 2 is slidably installed inside the probe arm housing 1, a position sensing ring 23 is provided in front of the first-level telescopic protective cover 2, a second-level sensor protective cover 3 is slidably installed inside the first-level telescopic protective cover 2, a sensor detection head 33 is fixedly installed inside the second-level sensor protective cover 3, and the front end inner surface of the second-level sensor protective cover 3 A sealing block 34 is fixedly installed on the surface, the inner surface of the sealing block 34 is sleeved with the outer surface of the sensor detection head 33, a signal amplifier 35 and a filter 36 are fixedly installed inside the secondary sensor protection cover 3, a processor module 37 is fixedly installed on the front side surface of the rear closing plate 11, the output end of the sensor detection head 33 is circuit-connected with the input end of the signal amplifier 35, the output end of the signal amplifier 35 is circuit-connected with the output end of the filter 36, the output end of the filter 36 is electrically connected with the input end of the processor module 37, and a communication module 38 is arranged at the front end of the processor module 37;

[0034] In this embodiment, the primary telescopic protective cover 2 slides on the probe arm housing 1, and the secondary sensor protective cover 3 slides inside the primary telescopic protective cover 2, so as to provide double protection for the sensor detection head 33. The rear closing plate 11 serves to close the rear end of the probe arm housing 1 and install the processor module 37. The front closing ring 12 serves to close the front end of the probe arm housing 1 and limit the sliding of the primary telescopic protective cover 2. The sensor detection head 33 detects the detection object when the secondary sensor protective cover 3 is extended. The appropriate sensor type can be selected according to the detection requirements. The signal amplifier 35 enhances the weak signal output by the sensor detection head 33 to adapt it to the subsequent circuit processing. The filter 36 can remove noise in the signal, including low-pass filtering, high-pass filtering or band-pass filtering, so that the signal is accurately transmitted to the processor module 37, and after being processed by the processor module 37, it is output to the acquisition computer through the communication module 38. After computer analysis, the analysis of the detection object is completed. The sealing blockage 34 can seal and protect the inside of the secondary sensor protection cover 3.

[0035] Embodiment 2

[0036] See also Figures 1 to 12 On the basis of the first embodiment, in order to maintain stable contact between the sensor detection head 33 and the detected object, the present embodiment further proposes that a first-level limiting ring 21 is fixedly installed on the front outer surface of the first-level telescopic protective cover 2, a sliding bracket 22 is fixedly installed on the rear surface of the position sensing ring 23, a fixed connecting block 221 is fixedly installed between the inner surface of the sliding bracket 22 and the outer surface of the first-level telescopic protective cover 2, a limiting sliding groove adapted to the fixed connecting block 221 is opened on the side wall of the probe arm housing 1, a position sensor 231 is fixedly installed on the front side of the position sensing ring 23, and the position sensor 231 The output end of the rear mounting frame 27 is connected to the input end circuit of the processor module 37, a rear mounting frame 27 is arranged at the rear of the primary telescopic protective cover 2, and the rear mounting frame 27 is fixedly mounted at the rear of the inner part of the probe arm housing 1, a threaded rod 271 is rotatably mounted between the front side surface of the rear mounting frame 27 and the rear side surface of the front closed ring 12, the inner wall of the fixed connection block 221 is threadedly connected to the outer surface of the threaded rod 271, a small motor 272 that drives the threaded rod 271 to rotate is fixedly mounted on the rear side surface of the rear mounting frame 27, and the control input end of the small motor 272 is connected to the control output end circuit of the processor module 37;

[0037] In this embodiment, the sliding bracket 22 and the fixed connecting block 221 play the role of fixing the position sensing ring 23 in front of the primary telescopic protective cover 2. The small motor 272 is started by the control signal output by the processor module 37, and the threaded rod 271 is driven to rotate. Under the cooperation of the limiting slide groove and the limiting rod, the fixed connecting block 221 moves to make the primary telescopic protective cover 2 and the position sensing ring 23 extend as a whole. The position sensor 231 on the position sensing ring 23 can sense the contact position of the detected object and feedback the signal to the control and analysis module inside the processor module 37. The processor module 37 outputs a control signal again to control the small motor 272 to stop, so that the extended position of the primary telescopic protective cover 2 is fixed. In this way, the secondary sensor protective cover 3 slides out from the inside of the primary telescopic protective cover 2 and contacts the detected object to maintain a stable contact distance without being squeezed. This solves the problem in the prior art that the elastic component is used to make the probe closely contact the detected object, and the elastic member will be fatigued or aged, which will affect the stability of the contact between the probe and the detected object.

[0038] Embodiment 3

[0039] See also Figures 1 to 12On the basis of the second embodiment, in order to protect the position sensor 231 and reduce wear, the present embodiment further proposes that an extrusion elastic washer 232 is slidably mounted on the front surface of the position sensing ring 23, a spring 2321 is fixedly mounted on the rear surface of the extrusion elastic washer 232, the rear end of the spring 2321 is fixedly connected to the inner wall of the sleeve of the position sensing ring 23, and a through groove matching the position sensor 231 is opened on the surface of the extrusion elastic washer 232;

[0040] In this embodiment, the extrusion elastic gasket 232 is arranged in front of the position sensor 231 to protect the position sensor 231. When the position sensing ring 23 comes into contact with the detection object, the extrusion elastic gasket 232 is squeezed to compress the spring 2321. At this time, the position sensor 231 senses the position of the detection object through the through groove of the extrusion elastic gasket 232, thereby avoiding the problem of wear caused by direct contact of the position sensor 231 and protecting the position sensor 231.

[0041] Embodiment 4

[0042] See also Figures 1 to 12 On the basis of the third embodiment, in order to make the sensor detection head 33 contact the detection object for detection, the present embodiment further proposes that a secondary limiting ring 25 is fixedly installed on the inner surface of the front end of the first telescopic protective cover 2, a limiting slide rail 251 is symmetrically fixedly installed on the front surface of the secondary limiting ring 25, a shielding cover mounting frame 24 is fixedly installed on the front end of the limiting slide rail 251, a shielding cover mounting frame 24 is symmetrically rotated and installed on the inner side of the shielding cover mounting frame 24, a gear 242 is fixedly installed in the middle of the connection between the shielding cover 241 and the shielding cover mounting frame 24, a third limiting ring 31 is fixedly installed on the outer surface of the middle part of the second sensor protective cover 3, and the outer surface of the third limiting ring 31 An external fixing ring 32 is fixedly installed on the surface, and a sliding rod 321 is symmetrically fixedly installed on the front side surface of the external fixing ring 32. A sliding hole adapted to the sliding rod 321 is opened on the inner wall of the secondary limiting ring 25. A rack 322 is fixedly installed on the front end of the sliding rod 321. The outer surface of the rack 322 is slidably connected to the inner surface of the limiting slide rail 251. The side surface of the rack 322 is meshed with the outer surface of the gear 242. A telescopic rod 26 is fixedly installed on one side of the inner surface of the primary telescopic protective cover 2. The output end of the telescopic rod 26 is fixedly connected to the rear side surface of the tertiary limiting ring 31, and the control input end of the telescopic rod 26 is connected to the control output end circuit of the processor module 37;

[0043] In this embodiment, after the small motor 272 receives the control signal of the processor module 37 and stops working, the processor module 37 outputs a control signal to the telescopic rod 26 again. The telescopic rod 26 works to push the third-level limit ring 31 to contact the first-level limit ring 21, and pushes the second-level sensor protection cover 3 out of the first-level telescopic protection cover 2, so that the position of the sensor detection head 33 and the position of the position sensing ring 23 are located in the same plane, so that the sensor detection head 33 is just in contact with the detection object, ensuring a constant contact force between the detection head and the detection object, thereby ensuring the stability of the detection signal. When the third-level limit ring 31 is pushed out by the telescopic rod 26, it will drive the external fixed ring 32 to move forward at the same time, and the slide bar 321 slides out to push the rack 322 out of the inside of the limiting slide rail 251. Because the rack 322 is engaged with the gear 242, it indirectly drives the shielding cover 241 to flip and gather, forming a shielding cover on the outside of the sensor detection head 33, so that the detection signal is not interfered with by the outside world, further ensuring the stable transmission of the signal.

[0044] Embodiment 5

[0045] See also Figures 1 to 12 Based on the fourth embodiment, this embodiment further proposes a detection method for detecting a stability signal probe arm, comprising the following steps:

[0046] Step 1: The first-level telescopic protective cover 2 is positioned. The processor module 37 outputs a control signal to start the small motor 272. The small motor 272 drives the threaded rod 271 to rotate, so that the fixed connection block 221 moves to promote the first-level telescopic protective cover 2 and the position sensing ring 23 to extend as a whole. The position sensor 231 on the position sensing ring 23 can sense the contact position of the detected object and feedback the signal to the control analysis module inside the processor module 37. The processor module 37 outputs a control signal again to control the small motor 272 to stop, so that the extended position of the first-level telescopic protective cover 2 is fixed;

[0047] Step 2: The secondary sensor protective cover 3 is extended. After the small motor 272 receives the control signal of the processor module 37 and stops working, the processor module 37 outputs a control signal to the telescopic rod 26 again. The telescopic rod 26 works to push the third-level limit ring 31 to contact the first-level limit ring 21, and pushes the secondary sensor protective cover 3 out of the first-level telescopic protective cover 2, so that the position of the sensor detection head 33 and the position of the position sensing ring 23 are located in the same plane, so that the sensor detection head 33 is just in contact with the detection object.

[0048] Step three, the sensor detection head 33 performs detection. The sensor detection head 33 detects the detection object when the secondary sensor protection cover 3 is extended. The signal amplifier 35 enhances the weak signal output by the sensor detection head 33 to adapt it to the subsequent circuit processing. The filter 36 can remove the noise in the signal, so that the signal is accurately transmitted to the processor module 37, and after being processed by the processor module 37, it is output to the acquisition computer through the communication module 38, and the analysis of the detection object is completed through computer analysis.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stability signal probe arm for detecting, comprising a probe arm housing (1), a rear end of the probe arm housing (1) being fixedly mounted with a rear closing plate (11) by bolts, a rear side surface of the rear closing plate (11) being provided with a connecting joint, and a front closing ring (12) being fixedly mounted at the front end of the probe arm housing (1), characterized in that: A primary telescopic protective cover (2) is slidably mounted inside the probe arm housing (1), a position sensing ring (23) is arranged in front of the primary telescopic protective cover (2), a secondary sensor protective cover (3) is slidably mounted inside the primary telescopic protective cover (2), and a sensor detection head (33) is fixedly mounted inside the secondary sensor protective cover (3); The first telescopic protective cover (2) is extended as a whole for positioning, and the second sensor protective cover (3) is pushed out from the inside of the first telescopic protective cover (2), so that the position of the sensor detection head (33) and the position of the position sensing ring (23) are located in the same plane, so that the sensor detection head (33) is just in contact with the detection object, and the sensor detection head (33) performs detection.

2. A stability signal detection arm for detection according to claim 1, characterized in that: A sealing block (34) is fixedly mounted on the inner surface of the front end of the secondary sensor protection sleeve (3), and the inner surface of the sealing block (34) is sleeved with the outer surface of the sensor detection head (33). A signal amplifier (35) and a filter (36) are fixedly mounted inside the secondary sensor protection sleeve (3), and a processor module (37) is fixedly mounted on the front surface of the rear closing plate (11).

3. A stability signal detection arm for detection according to claim 2, characterized in that: The output end of the sensor detection head (33) is connected to the input end circuit of the signal amplifier (35), the output end of the signal amplifier (35) is connected to the output end circuit of the filter (36), the output end of the filter (36) is electrically connected to the input end of the processor module (37), and a communication module (38) is provided at the front end of the processor module (37).

4. A stability signal detection arm for detection according to claim 1, characterized in that: A first-level limiting ring (21) is fixedly mounted on the front outer surface of the first-level telescopic protective cover (2), a sliding bracket (22) is fixedly mounted on the rear surface of the position sensing ring (23), a fixed connecting block (221) is fixedly mounted between the inner surface of the sliding bracket (22) and the outer surface of the first-level telescopic protective cover (2), and a limiting sliding groove matched with the fixed connecting block (221) is provided on the side wall of the probe arm housing (1).

5. A stability signal detection arm for detection according to claim 4, characterized in that: A position sensor (231) is fixedly mounted on the front side of the position sensing coil (23), the output end of the position sensor (231) is connected to the input end circuit of the processor module (37), and a rear mounting frame (27) is arranged at the rear of the primary telescopic protective cover (2), and the rear mounting frame (27) is fixedly mounted at the rear of the probe arm housing (1).

6. A stability signal detection arm for detection according to claim 5, characterized in that: A threaded rod (271) is rotatably mounted between the front surface of the rear mounting frame (27) and the rear surface of the front closing ring (12); the inner wall of the fixed connection block (221) is threadedly connected to the outer surface of the threaded rod (271); a small motor (272) for driving the threaded rod (271) to rotate is fixedly mounted on the rear surface of the rear mounting frame (27); a control input end of the small motor (272) is circuit-connected to a control output end of the processor module (37).

7. The stability signal detection arm for detection according to claim 1, characterized in that: A secondary limiting ring (25) is fixedly mounted on the inner surface of the front end of the primary telescopic protective cover (2); a limiting slide rail (251) is symmetrically fixedly mounted on the front surface of the secondary limiting ring (25); a shielding cover mounting frame (24) is fixedly mounted on the front end of the limiting slide rail (251); a shielding cover (241) is symmetrically rotatably mounted on the inner side of the shielding cover mounting frame (24); and a gear (242) is fixedly mounted in the middle of the connection between the shielding cover (241) and the shielding cover mounting frame (24).

8. A stability signal detection arm for detection according to claim 7, characterized in that: A third-level limiting ring (31) is fixedly mounted on the middle outer surface of the secondary sensor protection sleeve (3), an external fixing ring (32) is fixedly mounted on the outer surface of the third-level limiting ring (31), a sliding rod (321) is symmetrically fixedly mounted on the front surface of the external fixing ring (32), and a sliding hole adapted to match the sliding rod (321) is provided on the inner wall of the secondary limiting ring (25).

9. A stability signal detection arm for detection according to claim 8, characterized in that: A rack (322) is fixedly mounted on the front end of the slide rod (321); the outer surface of the rack (322) is slidably connected to the inner surface of the limiting slide rail (251); and the side surface of the rack (322) is meshed with the outer surface of the gear (242).

10. The stability signal detection arm for detection according to claim 7, characterized in that: A telescopic rod (26) is fixedly mounted on one side of the inner surface of the first-stage telescopic protective cover (2); an output end of the telescopic rod (26) is fixedly connected to the rear surface of the third-stage limiting ring (31); and a control input end of the telescopic rod (26) is circuit-connected to a control output end of a processor module (37).

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