Vacuum switch displacement sensor device based on friction nano-generation

Abstract

Disclosed is a vacuum switch displacement sensor device based on friction nanopower generation. In the vacuum switch displacement sensor device based on friction nanopower generation, a comb-shaped electrode is embedded in the pair of slots, a positioning shaft is installed in the first through hole, bearings are provided at both ends of the positioning shaft, the bearings move vertically in the pair of bearing slideways, a polymer friction sheet is arranged in the clamper slot via a sheet clamp and the polymer friction sheet abuts the comb-shaped electrode, the polymer friction sheet contacts the comb-shaped electrode to output a voltage signal through friction, a clamp is detachably connected to the clamper slot, a pressure regulating device is arranged in the second through hole and abuts the sheet clamp to regulate the contact pressure of the polymer friction sheet abutting the comb-shaped electrode, and a sampling integrated circuit is electrically connected to the comb-shaped electrode to collect the voltage signal to convert it into a displacement signal.

Description

Technical Field

[0001] The invention belongs to the technical field of vacuum switch electrical equipment, and in particular to a vacuum switch displacement sensor device based on friction nano-power generation. Background Art

[0002] Vacuum circuit breakers are constantly developing towards smaller and higher voltage levels, and their applications in the power sector are becoming more and more widespread. When the vacuum circuit breaker is opening and closing, the contacts have the characteristics of fast speed, frequent operation, and strong electromagnetic interference. Detecting the displacement speed of the vacuum circuit breaker contacts to ensure whether the circuit breaker is in normal working condition has always been a common way in the power industry. However, most of the displacement sensors on the market are active, require additional power supply, and are laborious to install, expensive, time-consuming, and inefficient.

[0003] The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention proposes a vacuum switch displacement sensor device based on friction nano-power generation, which realizes the passive, efficient and low-cost measurement of the movement of the moving contact of the vacuum circuit breaker.

[0005] The purpose of the present invention is achieved through the following technical solutions: a vacuum switch displacement sensor device based on friction nano-power generation includes:

[0006] A fixing device comprising,

[0007] A base having a strip-shaped through groove for fixing a repulsion mechanism of a vacuum circuit breaker;

[0008] A pair of structural bodies, which are vertically arranged on the base and are respectively arranged on both sides of the strip-shaped through groove;

[0009] A pair of slots, which are disposed on the pair of structural bodies and extend vertically along the structural bodies;

[0010] A comb-shaped electrode embedded in the pair of slots;

[0011] a pair of bearing slideways, which are disposed on the pair of structural bodies and extend vertically along the structural bodies;

[0012] A follower device comprising:

[0013] A clamper slot including a first horizontal through hole;

[0014] A positioning shaft, which is installed in the first through hole, with bearings provided at both ends of the positioning shaft, and the bearings move vertically in the pair of bearing slideways;

[0015] A polymer friction sheet is arranged in the clamping slot via a sheet clamp and the polymer friction sheet abuts against the comb-shaped electrode, and the polymer friction sheet contacts and rubs against the comb-shaped electrode to output a voltage signal;

[0016] A clamp, which is detachably connected to the clamp slot, and two sides of the clamp are provided with mounting holes for fixing the clamp and the insulating pull rod of the vacuum circuit breaker and a second horizontal through hole perpendicular to the first through hole;

[0017] a pressure regulating device, which is disposed in the second through hole and abuts against the sheet clamp to adjust the contact pressure of the polymer friction sheet abutting against the comb-shaped electrode;

[0018] The sampling integrated circuit is electrically connected to the comb-shaped electrodes to collect the voltage signal to convert it into a displacement signal.

[0019] In the vacuum switch displacement sensor device based on friction nanopower generation, a pair of threaded holes are provided at the top of the fixing device, and the top cover is detachably connected to the threaded holes to limit the position of the comb-shaped electrode in the slot in the vertical direction.

[0020] In the vacuum switch displacement sensor device based on friction nanopower generation, the pressure regulating device includes a variable diameter top screw and a spring. The variable diameter top screw includes a thin diameter end that clamps one end of the spring and a thick diameter end that is accommodated in the second through hole. The other end of the spring is in contact with the thin film clamp. The compression amount of the spring is adjusted by rotating the variable diameter top screw, thereby adjusting the contact pressure between the polymer friction thin film and the comb-shaped electrode.

[0021] In the vacuum switch displacement sensor device based on friction nano-power generation, the sheet holder is made of a rectangular metal block with grooves, and a polymer friction sheet is embedded in the grooves.

[0022] In the vacuum switch displacement sensor device based on friction nano-power generation, the sheet clamp moves horizontally in the clamp slot via a pressure regulating device.

[0023] In the vacuum switch displacement sensor device based on friction nanopower generation, the comb-shaped electrode is composed of a plurality of conductive strips with a spacing of 1 mm and a width of 1 mm arranged in parallel.

[0024] In the vacuum switch displacement sensor device based on friction nano-power generation, a gasket groove is opened on the inner side of the clamp, and a rubber gasket is placed in the gasket groove to fix the insulating pull rod of the vacuum circuit breaker.

[0025] In the vacuum switch displacement sensor device based on friction nanopower generation, the sampling integrated circuit includes a filtering and signal processing unit.

[0026] In the vacuum switch displacement sensor device based on friction nanopower generation, the sampling integrated circuit includes a single-chip microcomputer.

[0027] In the vacuum switch displacement sensor device based on friction nanopower generation, the sampling integrated circuit locates the initial point of the voltage mutation as the zero point of the displacement, and finds all the voltage peak positions based on the zero point. Since the comb electrodes are fixedly spaced, the distance between each voltage peak is fixed, and each peak position is the corresponding movement distance. The sampling integrated circuit obtains the displacement time curve and differentiates the displacement-time data to obtain the velocity-displacement curve.

[0028] Compared with the prior art, the present invention has the following advantages: the vacuum switch displacement sensor device based on friction nanopower generation described in the present invention does not require an additional power supply, has high measurement accuracy and is easy to install, and realizes passive, efficient and low-cost measurement of the movement of the moving contact of the vacuum circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] By reading the detailed description of the preferred specific embodiments below, various other advantages and benefits of the present invention will become clear to those of ordinary skill in the art. The drawings in the specification are only for the purpose of illustrating the preferred embodiments and are not considered to be limitations of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work. Moreover, the same reference numerals are used to represent the same components throughout the drawings.

[0030] In the attached picture:

[0031] Figure 1 is a schematic structural diagram of a fixing device for a vacuum switch displacement sensor device based on friction nano-power generation according to an embodiment of the present invention;

[0032] Figure 2 is a schematic structural diagram of a follower device of a vacuum switch displacement sensor device based on friction nano-power generation according to an embodiment of the present invention;

[0033] Figure 3 is a schematic diagram of the exploded structure of a vacuum switch displacement sensor device based on friction nano-power generation according to an embodiment of the present invention;

[0034] Figure 4 is a schematic diagram of a mold-closing structure of a vacuum switch displacement sensor device based on friction nano-power generation according to an embodiment of the present invention;

[0035] Figure 5 is a schematic diagram of a collection circuit flow of a vacuum switch displacement sensor device based on friction nano-power generation according to an embodiment of the present invention;

[0036] Figure 6 is a schematic diagram of a voltage signal waveform output by a vacuum switch displacement sensor device based on friction nano-power generation according to an embodiment of the present invention;

[0037] Figure 7 is a flow chart of a signal processing method for a vacuum switch displacement sensor device based on friction nano-power generation according to an embodiment of the present invention;

[0038] Figure 8 1. It is a schematic diagram comparing displacement-time experimental results of a vacuum switch displacement sensor device based on friction nano-power generation and a high-speed camera according to an embodiment of the present invention;

[0039] Fig. 9 It is a schematic diagram comparing the speed-displacement experimental results of a vacuum switch displacement sensor device based on friction nano-power generation and a high-speed camera according to an embodiment of the present invention.

[0040] The present invention is further explained below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0041] The following will refer to the attached Figures 1 to 9 Specific embodiments of the present invention are described in more detail. Although specific embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0042] It should be noted that certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that technicians may use different nouns to refer to the same component. This specification and claims do not use the difference in nouns as a way to distinguish components, but use the difference in the functions of the components as the criterion for distinction. As mentioned throughout the specification and claims, "including" or "comprising" is an open term, so it should be interpreted as "including but not limited to". The subsequent description of the specification is a preferred embodiment of the present invention, but the description is based on the general principles of the specification and is not intended to limit the scope of the present invention. The scope of protection of the present invention shall be determined by the attached claims.

[0043] To facilitate understanding of the embodiments of the present invention, further explanation will be given below by taking specific embodiments as examples in conjunction with the accompanying drawings, and each of the accompanying drawings does not constitute a limitation on the embodiments of the present invention.

[0044] For a better understanding, Figures 1 to 9As shown, the vacuum switch displacement sensor device based on friction nano-power generation includes:

[0045] A fixing device comprising,

[0046] A base 3 having a strip-shaped through groove 31 for fixing a repulsive mechanism of a vacuum circuit breaker;

[0047] A pair of structural bodies 2, which are vertically arranged on the base 3 and are respectively arranged on both sides of the strip-shaped through groove 31;

[0048] a pair of slots 25, 26, which are disposed on the pair of structural bodies 2 and vertically extend along the structural bodies 2;

[0049] A comb-shaped electrode 4, which is embedded in the pair of slots 25, 26;

[0050] a pair of bearing slideways 27, 28, which are disposed on the pair of structural bodies 2 and extend vertically along the structural bodies 2;

[0051] A follower device comprising:

[0052] The clamper slot 6 comprises a horizontal first through hole 61;

[0053] A clamp 5, which is detachably connected to the clamp slot 6, and two sides of the clamp 5 are provided with mounting holes for fixing the clamp 5 to the insulating pull rod of the vacuum circuit breaker and horizontal second through holes 51, 52 perpendicular to the first through hole 61;

[0054] A positioning shaft 7, which is installed in the first through hole 61, and bearings 8 are provided at both ends of the positioning shaft 7, and the bearings 8 move vertically in the pair of bearing slideways 27, 28;

[0055] A polymer friction sheet 10 is disposed in the clamping slot 6 via a sheet clamp 9 and the polymer friction sheet 10 abuts against the comb-shaped electrode 4. The polymer friction sheet 10 and the comb-shaped electrode 4 contact and rub to output a voltage signal.

[0056] a pressure regulating device 11, which is disposed in the second through holes 51, 52 and abuts against the sheet clamp 9 to adjust the contact pressure of the polymer friction sheet 10 abutting against the comb electrode 4;

[0057] The sampling integrated circuit is electrically connected to the comb-shaped electrodes 4 to collect the voltage signal to convert it into a displacement signal.

[0058] In a preferred embodiment of the vacuum switch displacement sensor device based on friction nanopower generation, a pair of threaded holes 21, 22 are provided at the top of the fixing device, and the top cover 1 is detachably connected to the threaded holes to limit the position of the comb-shaped electrode 4 in the slot in the vertical direction.

[0059] In a preferred embodiment of the vacuum switch displacement sensor device based on friction nanopower generation, the pressure regulating device 11 includes a reducer and a spring, the reducer includes a thin-diameter end that clamps one end of the spring and a thick-diameter end that is accommodated in the second through holes 51, 52, and the other end of the spring is in contact with the thin film clamp 9. The compression amount of the spring is adjusted by rotating the reducer to adjust the contact pressure between the polymer friction thin film 10 and the comb electrode 4.

[0060] In the preferred embodiment of the vacuum switch displacement sensor device based on friction nano-power generation, the sheet holder 9 is made of a rectangular metal block with grooves, and the polymer friction sheet 10 is embedded in the grooves.

[0061] In a preferred embodiment of the vacuum switch displacement sensor device based on friction nano-power generation, the sheet clamp 9 moves horizontally in the clamp slot 6 via the pressure regulating device 11 .

[0062] In a preferred embodiment of the vacuum switch displacement sensor device based on friction nano-power generation, the comb-shaped electrode 4 is composed of a plurality of conductive strips with a spacing of 1 mm and a width of 1 mm arranged in parallel.

[0063] In the preferred embodiment of the vacuum switch displacement sensor device based on friction nano-power generation, a gasket groove 55 is opened on the inner side of the clamp 5, and a rubber gasket is placed in the gasket groove 55 to fix the insulating pull rod of the vacuum circuit breaker.

[0064] In a preferred embodiment of the vacuum switch displacement sensor device based on friction nanopower generation, the sampling integrated circuit includes a filtering and signal processing unit.

[0065] In a preferred embodiment of the vacuum switch displacement sensor device based on friction nanopower generation, the sampling integrated circuit includes a single-chip microcomputer.

[0066] In a preferred embodiment of the vacuum switch displacement sensor device based on friction nanopower generation, the sampling integrated circuit locates the initial point of the voltage mutation as the zero point of the displacement, and finds all the voltage peak positions based on the zero point. Since the comb electrodes 4 are fixedly spaced, the distance between each voltage peak is fixed, and each peak position is the corresponding movement distance. The sampling integrated circuit obtains the displacement time curve and differentiates the displacement-time data to obtain the velocity-displacement curve.

[0067] In one embodiment, a vacuum switch displacement sensor device based on friction nano-power generation includes a fixing device consisting of a top cover 1, a structural body 2, a base 3, and a comb electrode 4, a follower device consisting of a clamp 5, a clamp slot 6, a positioning shaft 7, a bearing, a sheet clamp 9, a polymer friction sheet 10, a pressure regulating device 11, and a rubber gasket 12, and a displacement sensor consisting of a single-chip integrated circuit. The polymer friction sheet 10 is embedded in the sheet clamp 9 and fixed in the follower device, the clamp 5 of the follower device is fixed on the insulating pull rod of the vacuum circuit breaker and moves up and down with it, and the comb electrode 4 is embedded in the structural body 2 and fixed on the circuit breaker repulsion mechanism. The polymer friction sheet 10 contacts and moves with the comb electrode 4 to output electrical signals, which are collected and converted into displacement signals through the single-chip integrated circuit. The clamp 5 moves vertically up and down in the slideway of the structural body 2 through the positioning shaft 7 and the bearing, and is restricted from moving in the horizontal direction. The comb electrode 4 is composed of a plurality of conductive strips with a spacing of 1 mm and a width of 1 mm arranged in parallel. The main structure 2 includes a slot for fixing the comb-shaped electrode 4 and a bearing slideway. The comb-shaped electrode 4 is placed in the slot, and the top cover 1 is covered to fix the comb-shaped electrode 4. The main structure 2 is cut into a portion at the top and bottom, and a through hole is formed in the middle for the lead wire of the comb-shaped electrode 4.

[0068] In one embodiment, the sheet holder 9 is made of a rectangular metal block with a slot, and a polymer friction sheet 10 of suitable size is embedded in the slot of the sheet holder 9. The sheet holder 9 is placed in the holder slot 6 of the follower device, can only move in a small range in the horizontal direction, and contacts the spring in the pressure regulating device 11. The pressure regulating device 11 is composed of a variable diameter top screw with a thick bottom and a thin top and a spring, and the spring is clamped at the thin end. The thick end of the top screw is connected to the inner through hole of the clamp 5, and the other end of the spring is in contact with the sheet holder 9. By rotating the top screw, the spring compression amount can be adjusted to adjust the contact pressure between the polymer friction sheet 10 and the comb electrode 4. A gasket groove 55 is opened on the inner side of the clamp 5, and a rubber gasket is placed in the gasket groove 55, which is firmly fixed to the insulating pull rod of the vacuum circuit breaker. A strip through groove 31 is opened in the middle of the base 3, which is used to fix it on the repulsion mechanism of the vacuum circuit breaker and can be adjusted to an appropriate position.

[0069] In one embodiment, a single-chip sampling integrated circuit is installed at the back end of the structural body 2 to collect the voltage signal generated by the comb-shaped electrode 4, perform filtering and signal conversion, and finally output a velocity displacement signal.

[0070] In one embodiment, Figure 1As shown, the fixing device includes a top cover 1, a structural body 2, a base 3, and a comb-shaped electrode 4. The upper end of the structural body is respectively provided with two threaded holes 21, 22, and the top cover 1 is fixed to the structural body 2 through the threaded holes 21, 22. Further, the base 3 is fixed to the structural body 2 through the threaded holes. A pair of slots 25, 26 are provided on the left and right sides of the structural body 2, and the comb-shaped electrode 4 is embedded in the pair of slots 25, 26. The structural body 2 is respectively provided with a pair of bearing slideways 27, 28 on the front side of the slots, and the bearing 8 is placed in the pair of bearing slideways 27, 28 to limit its horizontal movement and can only move in the vertical direction. A strip-shaped through groove 31 is provided in the middle of the base 3 for fixing on the repulsion mechanism of the vacuum circuit breaker.

[0071] like Figure 2 , Figure 3 As shown, the follower device includes a clamp 5, a clamp slot 6, a positioning shaft 7, a bearing 8, a sheet clamp 9, a polymer friction sheet 10, a pressure regulating device 11, and a rubber gasket 12. The upper end of the clamp slot 6 is provided with a horizontal first through hole 61, and the positioning shaft 7 is installed in the first through hole 61 and fixed with a top screw. The inner groove of the clamp 5 is provided with a pair of horizontal second through holes 51, 52, and the pressure regulating device 11 is placed in the pair of second through holes 51, 52. The variable diameter top screw in the pressure regulating device 11 is rotated to adjust the compression amount of the spring, thereby adjusting the contact pressure between the polymer friction sheet 10 and the comb electrode 4. A gasket groove 55 is opened in the ring of the clamp 5, and the rubber gasket 12 is placed in the gasket groove 55. Two mounting holes 54, 53 are provided on both sides of the clamp 5 for installing screws to fix the clamp to the insulating pull rod of the vacuum circuit breaker.

[0072] Figure 7 is a flow chart of the signal processing method. The specific signal processing method is as follows: Figure 6 The voltage signal waveform of the sensor output is first located at the zero point of the displacement at the initial point of the voltage mutation, and all voltage peak positions are found based on the zero point. Since the comb electrodes are spaced at a fixed interval, the distance between each voltage peak is fixed, and each peak position is the corresponding movement distance, and the displacement-time curve can be obtained. Differentiate the displacement-time data to obtain the velocity-displacement curve.

[0073] Figure 8 and Fig. 9 The displacement-time curve and velocity-displacement curve experimental results of the device and the high-speed camera are compared. By comparing the experimental results, it can be found that the fit is good, which proves the effectiveness of the displacement sensor of the present invention.

[0074] Although the embodiments of the present invention are described above in conjunction with the accompanying drawings, the present invention is not limited to the above specific embodiments and application fields, and the above specific embodiments are only illustrative and instructive, rather than restrictive. A person of ordinary skill in the art can also make many forms under the guidance of this specification and without departing from the scope of protection of the claims of the present invention, all of which belong to the protection of the present invention.

Claims

1. A vacuum switch displacement sensor device based on friction nano-power generation, characterized in that: These include, A fixing device comprising, A base having a strip-shaped through groove for fixing a repulsion mechanism of a vacuum circuit breaker; A pair of structural bodies, which are vertically arranged on the base and are respectively arranged on both sides of the strip-shaped through groove; A pair of slots, which are disposed on the pair of structural bodies and extend vertically along the structural bodies; A comb-shaped electrode embedded in the pair of slots; a pair of bearing slideways, which are disposed on the pair of structural bodies and extend vertically along the structural bodies; A follower device comprising: A clamper slot including a first horizontal through hole; A positioning shaft, which is installed in the first through hole, with bearings provided at both ends of the positioning shaft, and the bearings move vertically in the pair of bearing slideways; A polymer friction sheet is arranged in the clamping slot via a sheet clamp and the polymer friction sheet abuts against the comb-shaped electrode, and the polymer friction sheet contacts and rubs against the comb-shaped electrode to output a voltage signal; A clamp, which is detachably connected to the clamp slot, and two sides of the clamp are provided with mounting holes for fixing the clamp and the insulating pull rod of the vacuum circuit breaker and a second horizontal through hole perpendicular to the first through hole; a pressure regulating device, which is disposed in the second through hole and abuts against the sheet clamp to adjust the contact pressure of the polymer friction sheet abutting against the comb-shaped electrode; a sampling integrated circuit electrically connected to the comb-shaped electrodes to collect the voltage signal to convert it into a displacement signal; Wherein, a pair of threaded holes are provided at the top of the fixing device, and the top cover is detachably connected to the threaded holes to limit the position of the comb-shaped electrode in the slot in the vertical direction; The pressure regulating device comprises a variable diameter top screw and a spring, wherein the variable diameter top screw comprises a thin diameter end clamped at one end of the spring and a thick diameter end accommodated in the second through hole, and the other end of the spring contacts the sheet holder, and the contact pressure between the polymer friction sheet and the comb-shaped electrode is adjusted by rotating the variable diameter top screw to adjust the compression amount of the spring; The sampling integrated circuit locates the initial point of the voltage mutation as the zero point of the displacement, and uses the zero point as a reference to find the positions of all voltage peaks. Since the comb electrodes are spaced at a fixed interval, the distance between each voltage peak is fixed, and each peak position is the corresponding movement distance. The sampling integrated circuit obtains a displacement time curve and differentiates the displacement-time data to obtain a velocity-displacement curve.

2. The vacuum switch displacement sensor device based on friction nano-power generation according to claim 1 is characterized in that: The sheet holder is made of a rectangular metal block with grooves, and a polymer friction sheet is embedded in the grooves.

3. The vacuum switch displacement sensor device based on friction nano-power generation according to claim 1 is characterized in that: The sheet clamper moves horizontally in the clamper slot via a pressure regulating device.

4. The vacuum switch displacement sensor device based on friction nano-power generation according to claim 1 is characterized in that: The comb-shaped electrode is composed of a plurality of conductive strips with a spacing of 1 mm and a width of 1 mm arranged in parallel.

5. The vacuum switch displacement sensor device based on friction nano-power generation according to claim 1 is characterized in that: A gasket groove is provided on the inner side of the clamp, and a rubber gasket is placed in the gasket groove to fix the insulating pull rod of the vacuum circuit breaker.

6. The vacuum switch displacement sensor device based on friction nano-power generation according to claim 1 is characterized in that: The sampling integrated circuit includes filtering and signal processing units.

7. The vacuum switch displacement sensor device based on friction nano-power generation according to claim 1 is characterized in that: The sampling integrated circuit includes a single chip microcomputer.

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