Dual tumbler type self-powered sensing device based on friction nanometer generator

Abstract

The invention relates to a sensing device, in particular to a dual-tumbler type self-powered sensing device based on a friction nanometer generator. The invention aims to provide a dual tumbler type self-energized sensing device based on a friction nano-generator, which can efficiently collect mechanical energy in an environment and convert the mechanical energy into electric energy so as to provide continuous power supply for a sensor. According to the technical scheme, the dual-tumbler type self-powered sensing device based on the friction nano-generator comprises a sensor; the device is characterized by comprising an outer shell with a cavity, a double-tumbler structure capable of being positioned in the cavity in a left-right swinging mode and an electromechanical transformation structure installed in the outer shell and driven by the double-tumbler structure. And the sensor is electrically connected with the electromechanical transformation structure.

Description

Technical Field

[0001] The invention relates to a sensing device, in particular to a double tumbler type self-powered sensing device based on a friction nanogenerator. Background Art

[0002] In recent years, with the rapid development of the Internet of Things, smart homes, smart transportation and other fields, the demand for sensors with real-time sensing capabilities continues to grow, so that the status of the environment, equipment or human body can be easily monitored. Traditional sensors usually rely on external power supplies, which limits their application scope, especially in some environments where it is difficult to access power.

[0003] Self-powered sensors do not require external power supply. They are self-powered through the mechanical energy conversion mechanism in the environment. This can not only reduce the frequency of battery replacement and maintenance costs, but also improve the reliability of the system, especially in environments where there is no power access or the battery is not easy to replace. Friction nanogenerators are a new type of energy harvesting technology that can effectively convert mechanical energy in the environment into electrical energy. Due to their high efficiency, flexibility and environmental friendliness, they have been widely used in low-power electronic devices and self-powered sensors, and have become a research hotspot in the field of self-powered sensors. However, most of the existing devices based on friction nanogenerators are single energy harvesting modes, which cannot take into account the multiple energy conversion requirements in complex motion processes, especially between equipment stability, energy collection efficiency and data transmission reliability. There are certain technical bottlenecks. Therefore, providing a power generation device required for self-powered sensors has become an urgent problem to be solved. Summary of the invention

[0004] In order to achieve the above objectives, the present invention provides a double tumbler-type self-powered sensing device based on a friction nanogenerator, which should be able to efficiently collect mechanical energy in the environment and convert it into electrical energy to provide continuous power supply for the sensor.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A double tumbler-type self-powered sensing device based on a friction nanogenerator, comprising a sensor; characterized in that: the device comprises an outer shell having a cavity, a double tumbler structure positioned in the cavity so as to swing left and right, and an electromechanical conversion structure installed in the outer shell and driven by the double tumbler structure; the sensor is electrically connected to the electromechanical conversion structure;

[0007] The outer shell is formed by splicing an upper shell, a lower shell and a side cover; wherein a cavity is provided in the lower shell and is through-through from front to back, and the outer bottom surface is an arc surface that is conducive to swinging, the bottom end of the cavity is an arc-shaped inner bottom surface, and the top end of the cavity is closed by a horizontally arranged cavity top plate;

[0008] The double tumbler structure comprises an arc-shaped tumbler with an arc-shaped groove in the middle and in the shape of a fan-shaped block, a counterweight block swingably positioned on the upper side of the arc-shaped tumbler, and a baffle fixed on the upper side of the counterweight block and having a U-shaped sliding groove on the top;

[0009] In the electromechanical conversion structure, the power generation structure includes two metal electrodes horizontally fixed on both sides of the cavity top plate, a slider reciprocatingly positioned between the two metal electrodes, and a dielectric film adhered to the bottom surface of the slider to sense the metal electrodes; the response structure includes a plurality of metal electrodes laid on the inner bottom surface of the arc and laid on the large arc surface at the bottom end of the fan-shaped block.

[0010] The small arc surface and the large arc surface of the fan-shaped block are arranged coaxially up and down, and the axes of the two arc surfaces are located above the fan-shaped block; the radius of the large arc surface is smaller than the radius of the circular arc inner bottom surface at the bottom end of the cavity, and the axis of the large arc surface is parallel to the axis of the circular arc inner bottom surface; so that the arc-shaped tumbler can swing left and right on the circular arc inner bottom surface.

[0011] The arc groove is located between the two end faces of the sector block and between the small arc surface and the large arc surface. The upper side of the arc groove also passes through the small arc surface and is coaxially arranged with the large arc surface.

[0012] The counterweight block is in the shape of a semi-cylinder with an outer arc surface facing downward, the arc radius of the semi-cylinder is smaller than the arc radius of the arc groove, and the distance between the two side end surfaces of the semi-cylinder is smaller than the distance between the two side groove walls of the arc groove, so that it can sink into the arc groove and swing along the arc surface of the bottom of the arc groove.

[0013] The two baffles extend from the front and rear sides of the cavity respectively and then extend vertically upwards to be used for inductive matching of the electromechanical conversion structure.

[0014] The slider is horizontally arranged with two long axes and one short axis protruding in the front-rear direction, and both ends of each axis extend to the outside of the slider and are fixed with a bearing; the bearings at both ends of a short axis in the middle position are also embedded in the U-shaped grooves on the two baffles, so that the slider can slide back and forth synchronously driven by the left and right swing of the baffles; and the two long axes extend to the horizontal groove on the inner side of the upper shell after crossing the baffle and slide in cooperation with the horizontal groove through the fixed bearings.

[0015] The upper shell and the lower shell are connected by an adjustment structure; the adjustment structure includes hexagonal nut columns installed on both sides of the lower shell and the top end thereof, two cylindrical notches opened on both sides of the upper shell and fixed to the outer ring of the adjustment bearing, and bolts with the adjustment bearing fixed to the top end and the hexagonal nut columns matched at the bottom end.

[0016] In the power generation structure, two metal electrodes each lead out an output end for outputting current to the sensor; in the sensing structure, several metal electrodes on the arc-shaped inner bottom surface are connected in parallel to lead out an output end, and the metal electrode sheet on the large arc surface at the bottom end of the fan-shaped block also leads out an output end, and the two output ends are used to output voltage signals to the sensor.

[0017] The dielectric film is a fluorinated ethylene propylene film; the metal electrode is a copper film.

[0018] Beneficial effects of the present invention:

[0019] 1. The non-contact independent layer power generation mode can reduce the friction loss between the dielectric film and the metal electrode and extend the service life of the device.

[0020] 2. An adjustment structure is added between the connecting parts on both sides of the upper and lower shells to adjust the spacing, so that the distance between the dielectric film and the metal electrode can be accurately controlled.

[0021] 3. The double tumbler structure has self-balancing properties, which enables the device to work stably in complex or unstable environments and achieve continuous energy collection and sensing.

[0022] 4. The semicircular tumbler structure with a U-shaped slide groove drives the slider to move through the slide groove, converting the irregular movement in the environment into the planar movement of the slider, which can better collect energy and achieve continuous power supply.

[0023] 5. The electrical signal generated by the friction nanogenerator has high sensitivity and can accurately respond to slight changes in the motion state. Combined with the tumbler structure, it can achieve stable monitoring under complex environmental conditions.

[0024] 6. The self-powered sensor implemented by the present invention can provide electrical energy and voltage signals to the sensor without external power supply, ensuring that the sensor can always be in normal working state. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the present invention.

[0026] Figure 2 Schematic diagram of an embodiment of the present invention

[0027] Figure 3 It is a schematic diagram of an explosion of an embodiment of the present invention.

[0028] Figure 4 Schematic diagram of the sensing structure in an embodiment of the present invention.

[0029] Figure 5 It is a three-dimensional schematic diagram of the adjustment structure in an embodiment of the present invention.

[0030] Figure 6 It is a three-dimensional schematic diagram of the double tumbler structure in an embodiment of the present invention.

[0031] Figure 7 It is a three-dimensional schematic diagram of the electromechanical conversion structure in an embodiment of the present invention.

[0032] Figure 8 Schematic diagram of power generation principle of an embodiment of the present invention.

[0033] In the figure: 1. large bearing, 2. slider, 3. small bearing, 4. dielectric film, 5. metal electrode, 6. arc-shaped tumbler, 6-1. arc-shaped groove, 6-2. small arc surface, 6-3. large arc surface, 7. counterweight, 8. baffle, 8-1. U-shaped slide groove, 9. bolt, 10. adjustment bearing, 11. hexagonal nut column, 12. lower shell, 12-1. cavity top plate, 13. side cover, 14. upper shell, 14-1. slide groove, 14-2. cylindrical notch, 15. outer shell, 16. power generation structure, 17. double tumbler structure, 18. induction structure, 19. adjustment structure. DETAILED DESCRIPTION

[0034] The present invention will be further described below with reference to the embodiments described in the accompanying drawings.

[0035] Example

[0036] Figure 1 , Figure 3 The double tumbler-type self-powered sensing device based on a friction nanogenerator shown includes a double tumbler structure 17 arranged in an outer shell and an electromechanical conversion structure installed in the outer shell and driven by the double tumbler structure; the electromechanical conversion structure includes a power generation structure 16 and a sensing structure 18 installed between the double tumbler structure and the bottom surface of the outer shell.

[0037] like Figure 2 , Figure 3 As shown, the outer shell 15 is formed by splicing the upper shell 14, the lower shell 12 and the side cover 13; wherein, a cavity is provided in the lower shell and the outer bottom surface is an arc surface, and the side cover is used to close the cavity in the front and rear directions of the lower shell; the bottom end of the cavity is an arc-shaped inner bottom surface, and the top end of the cavity is closed by a horizontally arranged cavity top plate 12-1, and the upper surface of the cavity top plate serves as a sliding track. The left and right sides of the upper shell are respectively made with cylindrical notches 14-2 for installing the adjustment structure; the inner side surfaces of the front and rear sides of the upper shell are respectively made with horizontally arranged slide grooves 14-1 to cooperate with the electromechanical conversion structure.

[0038] The distance between the upper shell 14 and the lower shell can be adjusted by an adjustment structure 19, which is arranged between the upper and lower shells and consists of an adjustment bearing 10, a bolt 9 and a hexagonal nut column 11. The adjustment bearing 10 is fixed in two cylindrical notches on both sides of the upper shell 14, and the inner ring of the adjustment bearing is fixed on the bolt 9; there are two rectangular notches at corresponding positions on both sides of the lower shell 12 for fixing and installing the hexagonal nut column 11; the bolt 9 and the adjustment bearing 10 can rotate synchronously, and the distance between the upper shell 14 and the lower shell 12 can be adjusted by adjusting the distance between the bolt 9 and the hexagonal nut column 11 to meet the required distance between the metal electrode 5 and the dielectric film 4.

[0039] like Figure 6 As shown, the double tumbler structure 17 includes an arc-shaped tumbler 6, a counterweight block 7 swingably positioned on the upper side of the arc-shaped tumbler, and a baffle 8 fixed on the upper side of the counterweight block. The arc-shaped tumbler 6 is a fan-shaped block 6 with an arc groove 6-1 in the middle, and the small arc surface of the fan-shaped block is coaxially arranged with the large arc surface up and down, and the axes of the two arc surfaces are located above the fan-shaped block. The radius of the large arc surface is significantly smaller than the radius of the circular arc inner bottom surface at the bottom end of the cavity, and the axis of the large arc surface is parallel to the axis of the circular arc inner bottom surface; therefore, after the arc-shaped tumbler is placed in the cavity of the lower shell, it can swing left and right on the circular arc inner bottom surface to form the first tumbler structure.

[0040] The arc groove is located between the two end faces of the fan-shaped block and between the small arc surface and the large arc surface. The upper side of the arc groove also penetrates the small arc surface and is arranged coaxially with the large arc surface. The counterweight block 7 is a semi-cylindrical shape with the outer arc surface facing downward. The arc radius of the semi-cylindrical counterweight block is smaller than the arc radius of the arc groove, and the distance between the two side end faces is smaller than the distance between the two side groove walls of the arc groove. Therefore, the counterweight block can sink into the arc groove and swing along the arc surface of the bottom of the arc groove to form a second tumbler structure; when swinging, the two side end faces of the counterweight block can basically remain parallel to the two side end faces of the fan-shaped block. Two baffles 8 with U-shaped slide grooves 8-1 are fixed at the top of the semicircular column; the two baffles extend from the front and rear sides of the cavity (i.e., toward the side cover direction) and then extend vertically upward to cooperate with the electromechanical conversion structure in movement.

[0041] like Figure 7 As shown, the electromechanical conversion structure includes a power generation structure 16 and an induction structure 18 , which include a large bearing 1 , a small bearing 3 , a metal electrode 5 , a dielectric film 4 and a slider 2 .

[0042] In the power generation structure, two metal electrodes 5 are horizontally fixed on both sides of the sliding track on the top plate of the cavity, the slider can be reciprocatingly slidably positioned between the two metal electrodes, and the dielectric film 4 is pasted on the bottom surface of the slider 2; two long axes and one short axis extending in the front-to-back direction (i.e., toward the side cover direction) are horizontally arranged on the slider 2, and the ends of each axis extend to the outside of the slider and are fixed with a bearing. The outer rings of the large bearings 1 at both ends of one of the short axes (the figure shows that the axis is in the middle of the three axes) are also inserted into the U-shaped slide grooves 8-1 of the two baffles, so that the slider can be synchronously reciprocated under the left and right swing of the baffle; and the two ends of the other two long axes extend to the inner side of the upper shell in the front-to-back direction respectively, so that they can slide in the left and right directions along the slide grooves 14-1 on the inner side of the upper shell through the small bearings fixed at the ends.

[0043] Obviously, the dielectric film 4 pasted on the bottom surface of the slider 2 and the two metal electrodes 5 on both sides of the sliding track are inductively matched to form the power generation structure 16 (non-contact independent layer power generation mode). The two metal electrodes can lead to an output end respectively, and the two output ends can be connected to the input end of the sensor to form a closed loop to power the sensor.

[0044] Preferably, the distance between the dielectric film and the metal electrode is smaller than the distance between two adjacent metal electrodes.

[0045] In addition, by Figure 4 It can be seen that: the arc-shaped inner bottom surface is paved with a number of metal electrodes 5, which are arranged along the arc line of the arc-shaped inner bottom surface, and the metal electrodes are spaced apart from each other; the large arc surface at the bottom of the fan-shaped block is paved with metal electrode sheets and dielectric films from the inside to the outside, and the dielectric film covers the metal electrode sheet (a separate metal electrode sheet, the same size as the dielectric film); forming the induction structure 18. When working, the arc-shaped tumbler swings back and forth on the arc-shaped inner bottom surface, and the dielectric film swings and rubs against the metal electrodes on the arc-shaped inner bottom surface, thereby generating induced charges on the metal electrodes. After the metal electrodes are connected in parallel, an output terminal is led out, and the metal electrode sheet also leads out an output terminal, and there is a voltage between the two output terminals, which can be used as the voltage signal required by the sensor.

[0046] Preferably, in the friction power generation structure, the dielectric film is selected from a polyperfluoroethylene propylene film, which has strong wear resistance and corrosion resistance. At the same time, polyperfluoroethylene propylene is an electret material, and the friction charge generated by contact sliding friction on its surface can stay on the film surface to promote the power generation effect. The metal electrode is selected from a copper sheet with a high-density film surface to promote the friction power generation effect.

[0047] The working principle of the present invention is as follows Figure 8 As shown:

[0048] In the static equilibrium state, the slider 2 is in the middle of the left and right electrodes, the double tumbler structure 17 is in a vertical position, and no charge flows in the circuit, as shown in the figure. When the device is acted upon by an external force, the double tumbler structure 17 drives the slider 2 to make horizontal reciprocating motion along the slide groove through the U-shaped groove; when the double tumbler structure 17 swings to the left, it drives the slider 2 to make horizontal motion to the left, the dielectric film 4 is negatively charged, and the surface of the metal electrode 5 is positively charged. Due to the electrostatic induction effect, the positive charge of the right electrode flows to the left electrode through the loop, and an instantaneous current is generated in the loop; when the slider 2 moves to the leftmost end, the number of positive charges in the left electrode reaches the maximum value, as shown in the figure <ii>When the double tumbler structure 17 moves from the leftmost end to the rightmost end, it drives the slider 2 to move horizontally from left to right. When the double tumbler structure 17 returns to the vertical position, the slider 2 returns to the middle position between the left and right electrodes. The left and right electrodes have the same amount of positive charge and are still in a balanced state. See the figure. <iii>The double tumbler structure 17 continues to swing to the right, driving the slider 2 to continue to move to the right. At this time, the positive charge in the left electrode continues to flow to the right electrode through the loop. When the slider 2 moves to the rightmost end, the amount of positive charge in the right electrode reaches the maximum value, as shown in the figure. <iv>The double tumbler structure 17 swings to the left again through the vertical position, and the slider 2 returns to the middle position between the left and right electrodes, as shown in the figure. , thus completing an induction power generation cycle. The output ends of the two electrodes can be connected to the sensor to output the working current to the sensor.

[0049] Several metal electrodes on the arc base are connected in parallel as one output terminal, and the metal electrode on the bottom surface of the lower shell cavity is another output terminal. The dielectric film at the bottom of the arc tumbler is in contact with the metal electrode on the arc base. When the arc tumbler swings on the arc base, due to the friction electrification effect, the surface of the metal electrode on the arc base that is in contact with the dielectric film is positively charged, and the surface of the dielectric film is negatively charged. When the arc tumbler continues to swing, the two contact surfaces gradually separate, and a potential difference is generated between the two surfaces, forming an instantaneous voltage signal. After being output through the two output terminals, it can be used as the voltage signal required by the sensor.

[0050] The tumbler is a traditional children's toy with a mechanical structure that has a self-restoring balance characteristic. This characteristic makes the tumbler structure stable and reliable in complex environments, and is particularly suitable for energy collection and self-powered systems in dynamic or vibrating environments. The double tumbler design provided by the present invention is based on the traditional tumbler structure. By adding a second tumbler module to form a double self-balancing system, which is combined with a friction nanogenerator to achieve a more efficient and lasting energy conversion process. It is suitable for self-powered sensor systems in dynamic environments and provides an effective solution for the stable operation of self-powered sensors.

[0051] The above are all preferred implementations of the present invention and are not intended to limit the present invention. It should be noted that for those skilled in the art, they can still modify the technical solutions described in the above embodiments, or replace some technical features with equivalent ones, which should be covered within the protection scope of the present invention. < / iv> < / iii> < / ii>

Claims

1. A double tumbler-type self-powered sensing device based on a friction nanogenerator, characterized in that: The device comprises an outer shell having a cavity, a double tumbler structure positioned in the cavity so as to be swingable left and right, and an electromechanical conversion structure installed in the outer shell and driven by the double tumbler structure; The outer shell (15) is formed by splicing an upper shell (14), a lower shell (12) and a side cover (13); wherein the lower shell is provided with a cavity that passes through from front to back and the outer bottom surface is an arc surface that is conducive to swinging, the bottom end of the cavity is an arc-shaped inner bottom surface, and the top end of the cavity is closed by a horizontally arranged cavity top plate (12-1); The double tumbler structure comprises an arc-shaped tumbler (6) with an arc-shaped groove (6-1) in the middle and in the shape of a fan-shaped block, a counterweight (7) swingably positioned on the upper side of the arc-shaped tumbler, and a baffle (8) fixed on the upper side of the counterweight and having a U-shaped sliding groove at the top; In the electromechanical conversion structure, the power generation structure (16) includes two metal electrodes (5) horizontally fixed on both sides of the cavity top plate, a slider (2) reciprocatingly positioned between the two metal electrodes, and a dielectric film (4) adhered to the bottom surface of the slider to sense the metal electrodes; the sensing structure (18) includes a plurality of metal electrodes laid on the inner bottom surface of the arc, a metal electrode sheet laid on the large arc surface at the bottom end of the fan-shaped block, and a dielectric film covering the outer surface of the metal electrode sheet.

2. The double tumbler-type self-powered sensing device based on a friction nanogenerator according to claim 1 is characterized in that: The small arc surface (6-2) and the large arc surface (6-3) of the fan-shaped block are arranged coaxially up and down, and the axes of the two arc surfaces are located above the fan-shaped block; the radius of the large arc surface is smaller than the radius of the circular arc inner bottom surface at the bottom end of the cavity, and the axis of the large arc surface is parallel to the axis of the circular arc inner bottom surface; so that the arc-shaped tumbler can swing left and right on the circular arc inner bottom surface.

3. The double tumbler-type self-powered sensing device based on a friction nanogenerator according to claim 2 is characterized in that: The arc groove is located between the two end faces of the sector block and between the small arc surface and the large arc surface. The upper side of the arc groove also passes through the small arc surface and is coaxially arranged with the large arc surface.

4. The double tumbler-type self-powered sensing device based on a friction nanogenerator according to claim 3 is characterized in that: The counterweight block is in the shape of a semi-cylinder with an outer arc surface facing downward, the arc radius of the semi-cylinder is smaller than the arc radius of the arc groove, and the distance between the two side end surfaces of the semi-cylinder is smaller than the distance between the two side groove walls of the arc groove, so that it can sink into the arc groove and swing along the arc surface of the bottom of the arc groove.

5. The double tumbler-type self-powered sensing device based on a friction nanogenerator according to claim 4 is characterized in that: The two baffles extend from the front and rear sides of the cavity respectively and then extend vertically upwards to be used for inductive matching of the electromechanical conversion structure.

6. The double tumbler-type self-powered sensing device based on a friction nanogenerator according to claim 5 is characterized in that: Two long shafts and one short shaft are arranged horizontally on the slider and protrude in the front-rear direction. Both ends of each shaft extend to the outside of the slider and are fixed with a bearing. The bearings at both ends of a short shaft in the middle position are also embedded in the U-shaped grooves on the two baffles, so that the slider can slide back and forth synchronously under the left and right swing of the baffles. The two long shafts extend to the horizontal groove on the inner side of the upper shell after crossing the baffle and slide in cooperation with the horizontal groove through the fixed bearings.

7. The double tumbler-type self-powered sensing device based on a friction nanogenerator according to claim 6 is characterized in that: The upper shell and the lower shell are connected via an adjustment structure; the adjustment structure comprises hexagonal nut columns (11) installed on both sides of the lower shell and with the top end installed, two cylindrical notches opened on both sides of the upper shell and fixed to the outer ring of the adjustment bearing (10), and a bolt (9) with the adjustment bearing fixed to the top end and the hexagonal nut column matched at the bottom end.

8. The double tumbler-type self-powered sensing device based on a friction nanogenerator according to claim 7 is characterized in that: In the power generation structure, two metal electrodes each lead out an output end for outputting current to the sensor; in the sensing structure, several metal electrodes on the arc-shaped inner bottom surface are connected in parallel to lead out an output end, and the metal electrode sheet on the large arc surface at the bottom end of the fan-shaped block also leads out an output end, and the two output ends are used to output voltage signals to the sensor.

9. The double tumbler-type self-powered sensing device based on a friction nanogenerator according to claim 8, characterized in that: The dielectric film is a fluorinated ethylene propylene film; the metal electrode is a copper film.

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