CN115201717A

CN115201717A - Power cable signal acquisition sensor

Info

Publication number: CN115201717A
Application number: CN202210977408.9A
Authority: CN
Inventors: 周达贤; 袁达辉; 黎锦棠; 刘近泉
Original assignee: Guangdong Power Grid Co Ltd; Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd
Current assignee: Guangdong Power Grid Co Ltd; Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority date: 2022-08-15
Filing date: 2022-08-15
Publication date: 2022-10-18

Abstract

The invention discloses a power cable signal acquisition sensor which comprises a box body, a sensor main body, an air bag and a shielding assembly, wherein a containing cavity is arranged in the box body, and heat dissipation holes communicated with the containing cavity are formed in the box body; the sensor main body is arranged in the accommodating cavity, and the top and the bottom of the sensor main body are connected with the cavity wall of the accommodating cavity through elastic components; the air bag can be pressed when the sliding block moves; the shielding assembly comprises a protective plate and an air moving rod, the protective plate is arranged on the wall of the accommodating cavity in a sliding mode, when the sliding block impacts the air bag, air in the air bag flows into the air moving rod, so that the rod body of the air moving rod stretches out to push the protective plate to move, and the protective plate covers the heat dissipation holes. The elastic component can play a role in fixing and buffering the sensor main body; the slider and the gasbag can utilize the outside to control the removal of protection shield to the energy of power cable signal acquisition sensor collision for the protection shield can shelter from the louvre, very big increase is to the electronic components security of sensor main part.

Description

Power cable signal acquisition sensor

Technical Field

The invention relates to the technical field of power cable signal acquisition, in particular to a power cable signal acquisition sensor.

Background

The power cable is used for transmitting and distributing electric energy, is commonly used for urban underground power grids, power station leading-out lines, power supply in industrial and mining enterprises and power transmission lines under river-crossing seawater, and has a gradually increasing proportion along with the development of science and technology. However, in daily use of the power cable, the internal core breaking damage of the power cable can be caused due to mechanical damage, aging and other reasons, and therefore a worker needs to use the power cable signal acquisition sensor to detect the power cable.

However, in the prior art, because the sensor contains a large number of electronic components inside, and the shell of the sensor can only perform a single protection function on the sensor, when the sensor is impacted or the position of the sensor needs to be moved when a worker uses the sensor, the electronic components can vibrate, so that the electronic components are damaged due to over stress, and the acquisition cost is increased; and a large amount of components and parts can produce a large amount of heat at the during operation, lead to the sensor inside high temperature for electronic components can't in time effectual heat dissipation, thereby lead to electronic components performance to descend, lead to electronic components to burn out when serious, and some producers set up the louvre at the shell of sensor, however, the check out test environment is complicated, and outside impurity can get into inside the shell through the louvre, influences the operation of sensor.

Disclosure of Invention

The embodiment of the invention aims to: the power cable signal acquisition sensor is good in quality, good in anti-seismic performance and good in heat dissipation effect.

In order to achieve the purpose, the invention adopts the following technical scheme:

there is provided a power cable signal acquisition sensor comprising:

the box body is internally provided with a containing cavity, and the box body is provided with heat dissipation holes communicated with the containing cavity;

the sensor main body is arranged in the accommodating cavity, and the top and the bottom of the sensor main body are connected with the cavity wall of the accommodating cavity through elastic components;

an air bag disposed within the receiving cavity;

the sliding block is arranged in the accommodating cavity in a sliding mode, the sliding block is in contact with the side face of the air bag, and the air bag can be squeezed when the sliding block moves;

the shielding assembly is arranged in the accommodating cavity and comprises a protective plate and an air moving rod, the protective plate is arranged on the wall of the accommodating cavity in a sliding mode, the inside of the air moving rod is communicated with the inside of the air bag, when the sliding block impacts the air bag, gas in the air bag flows into the air moving rod, so that the rod body of the air moving rod stretches out and pushes the protective plate to move, and the protective plate covers the heat dissipation holes.

As a preferred scheme of the power cable signal acquisition sensor, a heat dissipation assembly is arranged in the accommodating cavity and comprises an impeller, a gear and a rack, the rack is fixed on the sensor body and fixedly connected with the gear, the gear is meshed with the rack, the impeller is right opposite to the heat dissipation holes, and the sensor body shakes to enable the rack and the gear to drive the impeller to rotate.

As a preferable scheme of the power cable signal acquisition sensor, the heat dissipation assembly further comprises a ratchet wheel, a pawl and a connecting shaft, the connecting shaft is fixed with the impeller, one of the connecting shaft and the gear is fixed with the ratchet wheel, the other one of the connecting shaft and the gear is hinged with the pawl and is provided with a first elastic piece, a first elastic piece is arranged between the pawl and the connecting shaft, and the first elastic piece always has a tendency of driving the pawl to be meshed with the ratchet wheel, so that the impeller rotates in a single direction.

As a preferred scheme of the power cable signal acquisition sensor, the heat dissipation assembly comprises a counterweight wheel, and the counterweight wheel is fixed on the connecting shaft.

As a preferable scheme of the power cable signal acquisition sensor, the protection plate comprises a plate body and extension portions arranged on two sides of the plate body, the pneumatic rod is arranged below the extension portions, the plate body is in sliding connection with the cavity wall of the accommodating cavity, and damping balls are arranged between the plate body and the cavity wall of the accommodating cavity.

As a preferable scheme of the power cable signal acquisition sensor, the air bag is annular, the sliding blocks are provided in plurality, all the sliding blocks are located in the annular area of the air bag, and all the sliding blocks are annularly arranged around the center of the air bag.

As a preferable scheme of the power cable signal acquisition sensor, the sliding block is connected with the elastic component.

As a preferable scheme of the power cable signal acquisition sensor, a second elastic member is arranged in an air cavity of the air bag, two ends of the second elastic member are respectively connected with two opposite cavity walls in the air cavity, and the second elastic member is used for assisting the air bag to recover expansion.

As a preferred scheme of the power cable signal acquisition sensor, the elastic assembly is provided with a plurality of elastic assemblies, each elastic assembly comprises a third elastic piece and a fixture block, each fixture block is connected with the wall of the containing cavity through the third elastic piece, a clamping groove is formed in each fixture block, and the edge of the sensor main body is inserted into the clamping groove.

As a preferred scheme of the power cable signal acquisition sensor, a rubber pad is arranged between the clamping groove and the sensor main body.

The beneficial effects of the invention are as follows: by arranging the elastic component, the elastic component can play a role in fixing and buffering the sensor main body, so that the sensor main body is prevented from being damaged by collision; through setting up slider and gasbag, can utilize the outside to the removal of control protection shield to the energy of power cable signal acquisition sensor collision for the protection shield can shelter from the louvre, very big increase is to the electronic components security of sensor main part.

Drawings

The invention is explained in more detail below with reference to the figures and examples.

Fig. 1 is a schematic diagram of a power cable signal acquisition sensor according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of a power cable signal acquisition sensor according to an embodiment of the present invention (a box is not shown).

Fig. 3 is an enlarged schematic view of a portion a of fig. 2.

Fig. 4 is an enlarged schematic view of fig. 2 at B.

Fig. 5 is a schematic diagram of a fixture block according to an embodiment of the invention.

FIG. 6 is a schematic view of a gear, ratchet and pawl according to an embodiment of the present invention.

FIG. 7 is a schematic view of the interior of an airbag according to an embodiment of the present invention.

In the figure:

1. a box body; 2. a harness; 3. sealing the cover; 4. an air bag; 5. a slider; 6. a guide post; 7. a stopper; 8. a third elastic member; 9. a clamping block; 10. damping balls; 11. a card slot; 12. a support bar; 13. an impeller; 14. a gear; 15. a rack; 16. heat dissipation holes; 17. a protection plate; 18. a pneumatic rod; 19. a weight wheel; 20. a telescopic rod; 21. a second elastic member; 22. a rubber pad; 23. a protrusion; 24. fixing the rod; 25. a ratchet wheel; 26. a pawl; 27. a first elastic member; 28. a sensor body.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. 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.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 7, the power cable signal acquisition sensor provided by the invention comprises a box body 1, a sensor main body 28, an air bag 4, a slider 5 and a shielding assembly, wherein a containing cavity is arranged in the box body 1, a heat dissipation hole 16 communicated with the containing cavity is formed in the box body 1, and a strap 2 is arranged outside the box body 1, so that a worker can conveniently move the power cable signal acquisition sensor; the sensor main body 28 is arranged in the accommodating cavity, and the top and the bottom of the sensor main body 28 are connected with the cavity wall of the accommodating cavity through elastic components; the air bag 4 is arranged in the accommodating cavity; the sliding block 5 is arranged in the accommodating cavity in a sliding mode, the sliding block 5 is in contact with the side face of the air bag 4, and the air bag 4 can be squeezed when the sliding block 5 moves; the shielding component is arranged in the accommodating cavity and comprises a protective plate 17 and an air moving rod 18, the protective plate 17 is arranged on the wall of the accommodating cavity in a sliding mode, the inside of the air moving rod 18 is communicated with the inside of the air bag 4, when the sliding block 5 strikes the air bag 4, air in the air bag 4 flows into the air moving rod 18, so that the rod body of the air moving rod 18 stretches out to push the protective plate 17 to move, and the protective plate 17 covers the heat dissipation hole 16. By arranging the elastic component, the elastic component can play a role in fixing and buffering the sensor main body 28, so that the sensor main body 28 is prevented from being damaged by collision; through setting up slider 5 and gasbag 4, can utilize the outside to the removal of protection shield 17 of energy control of power cable signal acquisition sensor collision for protection shield 17 can shelter from louvre 16, very big increase is to the electronic components security of sensor main part 28.

In this embodiment, the protection plate 17 is a mesh plate, so that it is possible to reduce the influence of the protection cover on heat dissipation.

Specifically, the accommodating cavity is internally provided with a heat dissipation assembly, the heat dissipation assembly comprises an impeller 13, a gear 14 and a rack 15, the rack 15 is fixed on a sensor main body 28, the impeller 13 is connected with the gear 14, the gear 14 is meshed with the rack 15, the impeller 13 is opposite to the heat dissipation hole 16, and the sensor main body 28 shakes to enable the rack 15 and the gear 14 to drive the impeller 13 to rotate. By arranging the impeller 13, the impeller 13 rotates to promote the air in the box body 1 to flow to the outside, and the heat of the sensor main body 28 is taken away from the box body 1, so that the temperature of the sensor main body 28 is reduced; through the arrangement of the gear 14 and the rack 15, the impeller 13 can be driven to rotate by utilizing the shaking generated by the sensor main body 28, so that power is provided for the rotation of the impeller 13; when power cable signal acquisition sensor receives external force or staff and takes it to remove, the power that receives in the sensor main part 28 can not only single parallel power of rocking, and the people has an ascending trend when walking, fall to the ground back again and receive the reaction force on ground, so the people is taking power cable signal acquisition sensor to remove when, the inside main rocking of sensor main part 28 is for rocking from top to bottom, and when rocking from top to bottom when sensor main part 28, rack 15 also can reciprocate, thereby drive gear 14 and rotate, drive impeller 13 rotates.

Specifically, the heat dissipation assembly further comprises a ratchet wheel 25, a pawl 26 and a connecting shaft, the connecting shaft is fixed with the impeller 13, the two gears 14 are fixed with the ratchet wheel 25, the connecting shaft is hinged with the pawl 26 to enable the impeller 13 to rotate in a single direction, a first elastic piece 27 is arranged between the pawl 26 and the connecting shaft, and the first elastic piece 27 always has a tendency of driving the pawl 26 to be meshed with the ratchet wheel 25. When the sensor main body 28 shakes up and down, the rack 15 moves up and down along with the sensor main body 28, and the rack 15 is meshed with the gear teeth, so when the rack 15 moves down, the rack 15 drives the gear 14 to rotate, the gear 14 rotates to drive the impeller 13 to rotate together through the ratchet wheel 25 and the pawl 26, because the sensor main body 28 has weight, the force generated when the rack 15 moves down is large, when the rack 15 moves up, the gear 14 is also driven to rotate, but the gear 14 cannot drive the impeller 13 to rotate reversely, because the ratchet wheel 25 and the pawl 26 are arranged between the gear 14 and the impeller 13, the impeller 13 can rotate in a single direction, when the rack 15 shakes up and down along with the sensor main body 28, the impeller 13 can rotate, the impeller 13 rotates to blow out hot air in the box body 1 through the heat dissipation holes 16 or meshes of the protection plate 17, and therefore the temperature reduction of the interior of the sensor main body 28 is completed while the damping of the power cable signal acquisition sensor is completed.

Further, the heat dissipation assembly comprises a weight wheel 19, and the weight wheel 19 is fixed on the connecting shaft. The surface of the balance weight wheel 19 is designed to be mirror polished. When the impeller 13 rotates, the counterweight wheel 19 on the impeller 13 rotates along with the impeller 13, the counterweight wheel 19 can increase the rotation time of the impeller 13 after being stressed in the rotation process, the impeller 13 is stressed in the rotation process, the counterweight wheel 19 can increase the balance of the impeller 13 during the rotation process, meanwhile, the counterweight wheel 19 generates inertia in the rotation process, the impeller 13 can be driven to rotate, so that the rotation time of the impeller 13 is increased, the outward blowing cooling effect of the impeller 13 is increased, and meanwhile, the wind resistance of the counterweight wheel 19 during the rotation process can be reduced by the design of mirror polishing on the surface of the counterweight wheel 19, so that the rotation speed of the impeller 13 with the counterweight wheel 19 is increased. Of course, the weight wheel 19 can also balance the weight of the gear 14, so that the weight of both ends of the connecting shaft is balanced.

Specifically, the protection plate 17 comprises a plate body and extension parts arranged on two sides of the plate body, the pneumatic rod 18 is arranged below the extension parts, the plate body is in sliding connection with the cavity wall of the containing cavity, and the damping ball 10 is arranged between the plate body and the cavity wall of the containing cavity. Protection shield 17 is provided with damping ball 10 with the one side that holds the chamber wall contact for when protection shield 17 recovers downwards, under damping force of damping ball 10, can slowly recover, prevent that protection shield 17 from recovering the speed too fast, drive air stem 18 and recover too fast, the inside mutual striking of air stem 18 leads to the inside damage of air stem 18.

In this embodiment, elastic component is provided with a plurality ofly, elastic component includes guide pillar 6, third elastic component 8 and fixture block 9, third elastic component 8 is the spring, the periphery at guide pillar 6 is established to third elastic component 8 cover, be provided with draw-in groove 11 on the fixture block 9, the edge of sensor main part 28 inserts in draw-in groove 11, fixture block 9 slides and sets up on guide pillar 6, the both sides of guide pillar 6 all overlap and are equipped with third elastic component 8, the upper end of guide pillar 6 is provided with dog 7, box 1 includes case body and closing cap 3, closing cap 3 is articulated with the case body, dog 7 is used for supporting tightly with closing cap 3, the lower terminal surface fixedly connected with dead lever 24 of fixture block 9 of sensor main part 28 bottom, and dead lever 24 connects fixture block 9 of bottom.

In the present embodiment, the air bag 4 is annular, four sliders 5 are provided, all the sliders 5 are located in the annular region of the air bag 4, all the sliders 5 are annularly arranged around the center of the air bag 4, and the lower end of the guide post 6 is connected with the sliders 5. The lower end face of the guide post 6 is fixed on the upper end face of the slider 5, and the slider 5 can slide on the cavity bottom of the accommodating cavity, so when the power cable signal acquisition sensor is impacted by external force or a worker moves the power cable signal acquisition sensor to cause the sensor main body 28 to horizontally shake, the sensor main body 28 can drive the slider 5 to slide in the accommodating cavity through an elastic component, the slider 5 can impact the air bag 4 in the sliding process, the air bag 4 is made of soft rubber, so the air bag 4 can buffer and absorb shock when being impacted, the shock absorption for the parallel shake of the sensor main body 28 is realized, meanwhile, when the air bag 4 is impacted, gas in the air bag 4 can reach the inside of the pneumatic rod 18 through a pipeline, after the inside of the pneumatic rod 18 is filled with gas, the pneumatic rod 18 can extend upwards under the pressure of the gas, the pneumatic rod 18 can drive the protective plate 17 to move upwards in the extending process, the protective plate 17 moves upwards to block the protective plate 16, and heat in the sensor main body 28 can only pass through meshes on the protective plate 17, thereby reducing the heat dissipation effect of the heat dissipation hole 16, but greatly increasing the safety element inside the sensor.

Specifically, a rubber pad 22 is arranged between the card slot 11 and the sensor main body 28, and protrusions 23 are uniformly arranged on the surface of the rubber pad 22; during the use, the cushion 22 that the inner wall of draw-in groove 11 set up, and protruding 23 on the cushion 22 can increase the frictional force of contact between draw-in groove 11 and the sensor main part 28, makes the effect of draw-in groove 11 to the clamping of sensor main part 28 better, and cushion 22 can play the absorbing effect of buffering between sensor main part 28 and the draw-in groove 11 simultaneously.

In this embodiment, a support rod 12 is disposed in the accommodating cavity, the support rod 12 is fixed on the slider 5, and a connecting shaft of the heat dissipating assembly is rotatably disposed on the support rod 12.

Specifically, a second elastic part 21 and a telescopic rod 20 are arranged in an air cavity of the air bag 4, the second elastic part 21 is a spring, the second elastic part 21 is sleeved on the periphery of the telescopic rod 20, two ends of the telescopic rod 20 are respectively connected with two opposite cavity walls in the air cavity, and the second elastic part 21 and the telescopic rod 20 are used for assisting the air bag 4 to recover expansion. Because the material of gasbag 4 is rubber, has the resilience, in order to prevent that gasbag 4 from receiving the extrusion back, the elasticity of gasbag 4 can't push away slider 5 in time. Lead to gasbag 4 untimely emergence resilience, consequently inner wall at gasbag 4 is provided with telescopic link 20, and the cover is equipped with second elastic component 21 on telescopic link 20, gasbag 4 is when receiving the extrusion, the inner wall of gasbag 4 can extrude telescopic link 20, and telescopic link 20 can extrude second elastic component 21, make second elastic component 21 take place deformation, second elastic component 21 kick-backs afterwards, push telescopic link 20 recovery, and push gasbag 4's inner wall when telescopic link 20 recovers, make gasbag 4's resilience effect strengthen, the rate of kick-backing strengthens.

The working principle of the invention is as follows:

because the fixture block 9 clamps and fixes the sensor main body 28 through the clamping groove 11, the fixture block 9 is slidably disposed on the guide post 6, the lower end surface of the guide post 6 is fixed on the upper end surface of the slider 5, and the slider 5 can slide in the accommodating cavity, when the power cable signal acquisition sensor is impacted by external force or a worker moves the power cable signal acquisition sensor to cause the power cable signal acquisition sensor to horizontally shake, the sensor main body 28 pushes the fixture block 9 and drives the fixture block 9 to move together, the fixture block 9 drives the slider 5 to slide in the accommodating cavity through the guide post 6, the slider 5 can impact the air bag 4 in the sliding process, the air bag 4 is made of soft rubber, when the air bag 4 is impacted, the air bag 4 can buffer and dissipate heat holes, so as to realize the shock absorption when the sensor main body 28 shakes in parallel, meanwhile, when the air bag 4 is impacted, the gas in the air bag 4 can reach the interior of the pneumatic rod 18 through a pipeline, after the air is filled with the gas, the gas can extend upwards, the pneumatic rod 18 can drive the protective plate 17 to move upwards, the protective plate 17 can only block the heat dissipation effect of the heat dissipation element 16 to be greatly reduced, and the safety effect of the electronic device can be greatly reduced; when the power cable signal acquisition sensor is subjected to external force or is moved by workers, the force applied to the sensor main body 28 cannot be only single parallel shaking force, and people tend to move upwards when walking and are subjected to the reaction force of the ground after falling to the ground, so that when people move with the power cable signal acquisition sensor, the sensor main body 28 mainly shakes up and down, and when the sensor main body 28 shakes up and down, the clamping block 9 can be driven to slide up and down along the guide post 6, and the third elastic piece 8 arranged on the guide post 6 can buffer and absorb shock, so that electronic components in the sensor are prevented from being damaged after being subjected to overstress; when the sensor body 28 drives the fixture block 9 to move up and down, the fixture block 9 drives the rack 15 to move up and down, and the rack 15 on the rack 15 is meshed with the gear teeth, so when the rack 15 moves down, the rack 15 drives the gear 14 to rotate, under the action of the ratchet wheel 25 and the pawl 26, the gear 14 rotates to drive the impeller 13 to rotate together, due to the weight of the sensor, the force when the rack 15 moves down is large, when the rack 15 moves up, the gear 14 is also driven to rotate, under the action of the ratchet wheel 25 and the pawl 26, the gear 14 cannot drive the impeller 13 to rotate reversely, when the rack 15 swings up and down along with the fixture block 9, the impeller 13 rotates in a single direction, hot gas in the accommodating cavity is blown out through meshes of the protection plate 17, and therefore, the sensor body 28 is cooled while the power cable signal collector is damped.

In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are based on the orientation or positional relationship shown in the drawings for convenience in description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have a special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.

The technical principles of the present invention have been described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.

Claims

1. A power cable signal acquisition sensor, comprising:

an air bag disposed within the receiving cavity;

2. The power cable signal acquisition sensor according to claim 1, wherein a heat dissipation assembly is disposed in the accommodating cavity, the heat dissipation assembly includes an impeller, a gear and a rack, the rack is fixed on the sensor body, the impeller is fixedly connected to the gear, the gear is engaged with the rack, the impeller is aligned with the heat dissipation hole, and the sensor body rocks so that the rack and the gear drive the impeller to rotate.

3. The power cable signal acquisition sensor according to claim 2, wherein the heat dissipation assembly further comprises a ratchet wheel, a pawl and a connecting shaft, the connecting shaft is fixed with the impeller, one of the connecting shaft and the gear is fixed with the ratchet wheel, the other one of the connecting shaft and the gear is hinged with the pawl and is provided with a first elastic piece, a first elastic piece is arranged between the pawl and the connecting shaft, and the first elastic piece always has a tendency of driving the pawl to be meshed with the ratchet wheel so as to enable the impeller to rotate in a single direction.

4. The power cable signal acquisition sensor of claim 3, wherein the heat dissipation assembly comprises a weight wheel, the weight wheel being fixed to the connection shaft.

5. A power cable signal acquisition sensor according to claim 1, wherein the protection plate comprises a plate body and extension portions arranged at two sides of the plate body, the pneumatic rod is arranged below the extension portions, the plate body is slidably connected with the wall of the accommodating cavity, and damping balls are arranged between the plate body and the wall of the accommodating cavity.

6. A power cable signal acquisition sensor according to claim 1, wherein the air-bag is annular, the slider is provided in plurality, all of the sliders are located within an annular region of the air-bag, and all of the sliders are arranged annularly about a center of the air-bag.

7. The power cable signal acquisition sensor of claim 6, wherein the slider is connected to the resilient assembly.

8. The power cable signal acquisition sensor according to claim 1, wherein a second elastic member is disposed in the air cavity of the air bag, two ends of the second elastic member are respectively connected to two opposite cavity walls in the air cavity, and the second elastic member is used for assisting the air bag to recover to expand.

9. The power cable signal acquisition sensor according to claim 1, wherein the plurality of elastic assemblies are provided, each elastic assembly comprises a third elastic member and a fixture block, the fixture block is connected with the wall of the accommodating cavity through the third elastic member, a clamping groove is provided on the fixture block, and an edge of the sensor body is inserted into the clamping groove.

10. A power cable signal acquisition sensor according to claim 9, wherein a rubber pad is provided between the slot and the sensor body.