CN109546889B - Time-sharing multiplexing piezoelectric type energy collecting device - Google Patents
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Abstract
The invention provides a time-sharing multiplexing piezoelectric type energy collecting device which comprises a cavity, and a transmission shaft, a dial wheel, a cam, a push rod supporting frame, a spring, a piezoelectric cantilever beam, a piezoelectric sheet, a lead and a conductive switch which are arranged in the cavity; one end of the transmission shaft is matched with the bottom of the cavity, and the other end of the transmission shaft is matched with the top of the cavity; the dial wheel and the cam are sequentially coaxially linked with the transmission shaft from top to bottom; one end of the push rod is connected with the cam, and when the cam rotates, the push rod makes reciprocating linear movement; by applying the technical scheme, a time-sharing multiplexing function can be realized.
Description
Technical Field
The invention relates to the field of energy collecting devices, in particular to a time-sharing multiplexing piezoelectric type energy collecting device.
Background
In recent years, with the development of wireless electronic devices, electronic devices are becoming more and more miniaturized, low in power consumption, and wide in application range. However, most wireless electronic devices rely on conventional batteries for power supply, and the conventional batteries have the disadvantages of limited service life, periodic replacement, etc., so that the miniaturization and application range of the wireless electronic devices are further limited. In order to solve the inconvenience of the conventional battery, researchers have proposed an energy collecting device that absorbs energy from the surrounding environment and converts it into electric energy. At present, the energy collecting device mainly has modes such as electromagnetic type, friction type, piezoelectric type, etc., wherein the piezoelectric type energy collecting device has the advantages of simple structure, easy realization of miniaturization, high output efficiency, etc., so that the piezoelectric type energy collecting device becomes the key research direction of researchers.
At present, a piezoelectric energy collecting device has a structure in which low-frequency energy collected from the surrounding environment is converted into rotational motion of a rotary member such as a gear or a dial wheel, and the piezoelectric cantilever beam is hit by the rotation of the structure such as the gear or the dial wheel, so that the piezoelectric cantilever beam generates free vibration, and a piezoelectric sheet attached to the piezoelectric cantilever beam generates electric energy output after being excited. In order to improve the output power of the piezoelectric energy collecting device, researchers at home and abroad propose various schemes. One scheme is that a plurality of piezoelectric cantilever beams are symmetrically distributed along the circumferential direction of the cylindrical cavity, so that the rotary component can strike the plurality of piezoelectric cantilever beams in one period when rotating, and all groups of piezoelectric cantilever beams are output in parallel; however, due to various reasons such as machining errors, installation errors, material errors and the like, the groups of piezoelectric cantilever beams distributed in the circumferential direction cannot be guaranteed to be in the same phase when being excited by the outside to generate vibration, and the final result may not improve the output power. The other scheme is that each piezoelectric cantilever beam distributed circumferentially is respectively used as a power supply to be connected with an external load, and a plurality of independent input circuits and output circuits are arranged to supply power to the load; however, this method increases the number of circuits and processing difficulty, increases the complexity of the entire device, and increases the circuit cost.
Disclosure of Invention
The invention aims to provide a time-sharing multiplexing piezoelectric type energy collecting device, which realizes a time-sharing multiplexing function.
The invention provides a time-sharing multiplexing piezoelectric type energy collecting device which comprises a cavity, and a transmission shaft, a dial wheel, a cam, a push rod supporting frame, a spring, a piezoelectric cantilever beam, a piezoelectric sheet, a lead and a conductive switch which are arranged in the cavity;
one end of the transmission shaft is matched with the bottom of the cavity, and the other end of the transmission shaft is matched with the top of the cavity; the dial wheel and the cam are sequentially coaxially linked with the transmission shaft from top to bottom; one end of the push rod is connected with the cam, and when the cam rotates, the push rod makes reciprocating linear movement; one end of the push rod, which is far away from the cam, is fixed on a push rod supporting frame, one end of the push rod, which is connected with the cam, is provided with a retaining ring, the other end of the push rod is provided with a concave groove, and a conductive layer is coated on the upper inner wall and the lower inner wall of the concave groove and the local positions of the upper outer surface and the lower outer surface of the push rod; the spring is sleeved on the push rod and arranged between the baffle ring and the push rod support frame, one end of the push rod support frame is fixed at the bottom of the cavity, and the other end of the push rod support frame supports the push rod; one end of the piezoelectric cantilever beam is fixed with the cavity, and the other end of the piezoelectric cantilever beam is a free end; the piezoelectric sheet is attached to the surface of the piezoelectric cantilever; the conductive switch is fixed on the inner wall of the cavity, the positive electrode and the negative electrode at one end of the conductive switch are connected with the positive electrode and the negative electrode of the piezoelectric plate through leads, and the other end of the conductive switch is in sliding connection with the positive electrode and the negative electrode in the concave groove.
In a preferred embodiment, a shifting sheet is arranged on the side surface of the shifting wheel; the symmetry line of the shifting piece in the horizontal direction and the symmetry line of the cam in the horizontal direction are positioned on the same plane and are arranged in a linkage manner with the transmission shaft; when the transmission shaft rotates, the thumb wheel and the cam rotate around the axis of the transmission shaft synchronously.
In a preferred embodiment, the conductive layers on the upper and lower outer surfaces of the push rod are respectively a positive electrode and a negative electrode, and the positive electrode on the outer surface of the push rod is connected to a point by a lead to serve as the positive electrode of the whole energy collecting device, and the negative electrode on the outer surface of the push rod is connected to a point to serve as the negative electrode of the whole energy collecting device; the number of the push rods is the same as that of the piezoelectric cantilevers, and the push rods are increased along with the increase of the number of the piezoelectric cantilevers.
In a preferred embodiment, the number of the piezoelectric cantilever beams is at least two, and the piezoelectric cantilever beams are symmetrically distributed in the cavity; one end of the piezoelectric cantilever beam is fixed with the cavity, the other end of the piezoelectric cantilever beam abuts against the shifting piece of the shifting wheel along the rotating direction of the shifting wheel, and when the shifting wheel drives the shifting piece to rotate, the shifting piece abuts against the piezoelectric cantilever beam to enable the piezoelectric cantilever beam to deform.
In a preferred embodiment, the energy collecting device is provided with four push rods, four piezoelectric cantilever beams, four piezoelectric sheets and four conductive switches; the first push rod, the second push rod, the third push rod, the fourth push rod, the first piezoelectric cantilever beam, the second piezoelectric cantilever beam, the third piezoelectric cantilever beam, the fourth piezoelectric cantilever beam, the first piezoelectric sheet, the second piezoelectric sheet, the third piezoelectric sheet, the fourth piezoelectric sheet, the first conductive switch, the second conductive switch, the third conductive switch and the fourth conductive switch are respectively arranged.
In a preferred embodiment, when the thumb wheel and the cam rotate, the first piezoelectric cantilever beam is firstly beaten by the thumb piece to generate free vibration, so that the first piezoelectric piece attached to the first piezoelectric cantilever beam is excited to generate electric quantity, the first push rod is forced by the outer contour of the cam to move towards the outer side of the cavity by the compression spring, is in contact with the first conductive switch and keeps a certain length of contact distance, at the moment, the second push rod, the third push rod and the fourth push rod are in a near-rest or return-stroke state and are respectively disconnected with the corresponding second conductive switch, the third conductive switch and the fourth conductive switch, at the moment, only the first piezoelectric piece generates electric quantity and is connected with an external load through a lead, namely, only the first piezoelectric piece is used as a power supply to be connected with the external load;
when the thumb wheel continues to rotate and hit the second piezoelectric cantilever beam, the first push rod is in a return stroke state and gradually moves back under the action of the restoring force of the spring and is disconnected with the first conductive switch, the second piezoelectric cantilever beam generates free vibration after being hit, so that the second piezoelectric sheet attached to the second piezoelectric cantilever beam is excited to generate electric quantity, the second push rod is forced by the outer contour of the cam to compress the spring to move towards the outer side of the cavity and contact with the second conductive switch, and keeping a certain length of contact distance, at the moment, the first push rod, the third push rod and the fourth push rod are in a near-rest or return state and are respectively disconnected with the corresponding first conductive switch, the third conductive switch and the fourth conductive switch, at the moment, only the second piezoelectric patch generates electric quantity and is connected with an external load through a lead, namely, only the second piezoelectric patch is used as a power supply to be conducted with the external load;
continuing moving according to the mode, sequentially exciting the third piezoelectric sheet and the fourth piezoelectric sheet to generate electric quantity, connecting the electric quantity with an external load through a lead, and sequentially serving as a power supply to be conducted with the external load; and then the operation is repeated in a circulating way, and the switches are sequentially switched by the motion mode of the mechanical structure, so that each piezoelectric plate is sequentially excited to generate electric quantity and is connected with an external load through a lead, and the piezoelectric plates are sequentially used as a power supply to supply power for the external load, thereby realizing the function of time division multiplexing.
In a preferred embodiment, the springs are embodied as cylindrical compression springs, the number of springs being the same as the number of push rods, increasing with increasing number of push rods.
In a preferred embodiment, the push rod is embodied as a pointed push rod or a roller push rod or a flat-bottomed push rod.
In a preferred embodiment, the cam is embodied as a disc cam or a cylindrical cam.
In a preferred embodiment, the putter support frame is embodied as an arch-shaped putter support frame.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
according to the piezoelectric energy collecting device with time division multiplexing, provided by the invention, through the combined design of structures such as the thumb wheel, the transmission shaft, the cam, the push rod, the spring, the push rod supporting frame and the conductive switches, in one period, the switches are sequentially switched through the motion mode of the mechanical structure, so that each piezoelectric plate is sequentially excited to generate electric quantity and is connected with an external load through a wire, and the piezoelectric plates are sequentially used as a power supply to supply power to the external load, so that the time division multiplexing function is realized.
1. The cam and the push rod transmission device are adopted, so that the rotary motion of the cam can be converted into the linear reciprocating motion of the push rod; the outer contour shape of the cam can be designed according to the number of the piezoelectric cantilever beams which are actually arranged and the size of the device, so that the motion of the push rod meets the required requirements; a plurality of piezoelectric cantilevers can thus be arranged in the circumferential direction.
2. The plurality of piezoelectric cantilever beams symmetrically distributed on the circumference are time-sharing multiplexed and sequentially used as a power supply to supply power to an external load, so that the reduction of output power caused by the existence of phase difference when the plurality of piezoelectric sheets symmetrically distributed on the circumference adopt a parallel connection mode can be effectively avoided.
3. The switch is sequentially switched by adopting a mechanical structure with simple structure and lower cost, so that each piezoelectric plate is sequentially excited to generate electric quantity and is connected with an external load through a lead, and the piezoelectric plates are sequentially used as a power supply to supply power for the external load, thereby realizing a time-sharing multiplexing function, effectively reducing the number of output circuits and reducing the processing difficulty of the circuits, and further reducing the manufacturing cost of the whole device.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a time-multiplexed piezoelectric energy harvesting device according to a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of the structure of the components inside the cavity of a time-multiplexed piezoelectric energy harvesting device according to a preferred embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a time-division multiplexing piezoelectric energy harvesting device according to a preferred embodiment of the present invention.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
A time-sharing multiplexing piezoelectric type energy collecting device refers to figures 1 to 3 and comprises a cavity 1, a transmission shaft 2, a dial wheel 3, a cam 4, a push rod supporting frame 9, a spring 10, a piezoelectric cantilever beam, a piezoelectric sheet, a lead 19 and a conductive switch, wherein the transmission shaft 2, the dial wheel 3, the cam 4, the push rod supporting frame 9, the spring 10, the piezoelectric cantilever beam, the piezoelectric sheet; specifically, the springs 10 are cylindrical compression type springs, and the number of the springs 10 is the same as that of the push rods and increases with the increase of the number of the push rods; the cam 4 is embodied as a disc cam 4. The shape of the cavity 1 may be designed to be circular or square, and in this embodiment, it is specifically a circular cavity.
One end of the transmission shaft 2 is matched with the bottom of the cavity 1, and the other end of the transmission shaft is matched with the top of the cavity 1; the dial wheel 3 and the cam 4 are sequentially coaxially linked with the transmission shaft 2 from top to bottom; specifically, the push rod is a pointed push rod, a roller push rod or a flat-bottom push rod; one end of the push rod is connected with the cam 4, and when the cam 4 rotates, the push rod makes reciprocating linear movement; specifically, the push rod support frame 9 is specifically an arch-shaped push rod support frame 9; one end of the push rod, which is far away from the cam 4, is fixed on a push rod supporting frame 9, one end of the push rod, which is connected with the cam 4, is provided with a retaining ring, the other end of the push rod is provided with a concave groove, and the upper inner wall and the lower inner wall of the concave groove and the local positions of the upper outer surface and the lower outer surface of the push rod are coated with a conductive layer; the spring 10 is sleeved on the push rod and arranged between the baffle ring and the push rod supporting frame 9, one end of the push rod supporting frame 9 is fixed at the bottom of the cavity 1, and the other end supports the push rod; one end of the piezoelectric cantilever beam is fixed with the cavity 1, and the other end of the piezoelectric cantilever beam is a free end; the piezoelectric sheet is attached to the surface of the piezoelectric cantilever; the conductive switch is fixed on the inner wall of the cavity 1, the positive and negative poles at one end of the conductive switch are connected with the positive and negative poles of the piezoelectric plate through leads 19, and the other end of the conductive switch is in sliding connection with the positive and negative poles in the concave groove.
A shifting sheet 31 is arranged on the side surface of the shifting wheel 3; the symmetry line of the shifting piece 31 in the horizontal direction and the symmetry line of the cam 4 in the horizontal direction are on the same plane and are arranged in a linkage way with the transmission shaft 2; when the transmission shaft 2 rotates, the thumb wheel 3 and the cam 4 synchronously rotate around the axis of the transmission shaft 2. The number of the poking pieces 31 on the poking wheel 3 can be designed according to actual requirements, and is 1 in the embodiment.
The conducting layers on the upper outer surface and the lower outer surface of the push rod are respectively a positive electrode and a negative electrode, the positive electrode on the outer surface of the push rod is connected to one point by a lead 19 to serve as the positive electrode of the whole energy collecting device, and the negative electrode on the outer surface of the push rod is connected to one point to serve as the negative electrode of the whole energy collecting device; the number of the push rods is the same as that of the piezoelectric cantilevers, and the push rods are increased along with the increase of the number of the piezoelectric cantilevers.
The number of the piezoelectric cantilever beams is at least two, and the piezoelectric cantilever beams are symmetrically distributed in the cavity 1; one end of the piezoelectric cantilever beam is fixed with the cavity 1, the other end of the piezoelectric cantilever beam is abutted with the shifting piece 31 of the shifting wheel 3 along the rotating direction of the shifting wheel 3, and when the shifting wheel 3 drives the shifting piece 31 to rotate, the shifting piece 31 is abutted with the piezoelectric cantilever beam to deform the piezoelectric cantilever beam. The dial wheel 3, the transmission shaft 2, the cam 4, the push rod, the spring 10, the push rod support frame 9, the conductive switch and other structures form at least a two-stage mechanical transmission structure, which is the two-stage mechanical transmission structure in the embodiment.
The energy collecting device is provided with four push rods, four piezoelectric cantilever beams, four piezoelectric sheets and four conductive switches; the first push rod 5, the second push rod 6, the third push rod 7, the fourth push rod 8, the first piezoelectric cantilever beam 11, the second piezoelectric cantilever beam 12, the third piezoelectric cantilever beam 13, the fourth piezoelectric cantilever beam 14, the first piezoelectric patch 15, the second piezoelectric patch 16, the third piezoelectric patch 17, the fourth piezoelectric patch 18, the first conductive switch 20, the second conductive switch 21, the third conductive switch 22 and the fourth conductive switch 23 are respectively arranged. The number of the piezoelectric cantilevers and the number of the piezoelectric sheets can be designed according to actual requirements. The external contour shape of the cam 4 can be designed according to the number of the piezoelectric cantilever beams, the switching requirement and the size of the device. The first conductive switch 20, the second conductive switch 21, the third conductive switch 22, and the fourth conductive switch 23 may adopt a sliding contact structure of a concave groove and a rectangular block, or may also adopt a contact structure of a pulley and a guide rail, or other relatively slidable contact structures, in this embodiment, a sliding contact structure of a concave groove and a rectangular block.
When the thumb wheel 3 and the cam 4 rotate, the first piezoelectric cantilever beam 11 is firstly beaten by the thumb piece 31 to generate free vibration, so that the first piezoelectric piece 15 attached to the first piezoelectric cantilever beam 11 is excited to generate electric quantity, the first push rod 5 is forced by the outer contour of the cam 4 to move the compression spring 10 to the outer side of the cavity 1, is in contact with the first conductive switch 20 and keeps a certain length of contact distance, at the moment, the second push rod 6, the third push rod 7 and the fourth push rod 8 are in a near-rest or return state and are respectively disconnected with the corresponding second conductive switch 21, the third conductive switch 22 and the fourth conductive switch 23, at the moment, only the first piezoelectric piece 15 generates electric quantity and is connected with an external load through a lead 19, namely, only the first piezoelectric piece 15 is used as a power supply and is connected with the external load;
when the thumb wheel 3 continues to rotate and impact the second piezoelectric cantilever beam 12, the first push rod 5 is in a return state and gradually moves back under the action of the restoring force of the spring 10 and is disconnected from the first conductive switch 20, the second piezoelectric cantilever beam 12 generates free vibration after being impacted, so that the second piezoelectric patch 16 attached to the second piezoelectric cantilever beam 12 is excited to generate electric quantity, the second push rod 6 is forced by the outer contour of the cam 4 to compress the spring 10 to move towards the outer side of the cavity 1 and is contacted with the second conductive switch 21 and keeps a certain length of contact distance, at the moment, the first push rod 5, the third push rod 7 and the fourth push rod 8 are in a near-rest or return state and are respectively disconnected from the corresponding first conductive switch 20, the third conductive switch 22 and the fourth conductive switch 23, only the second piezoelectric patch 16 generates electric quantity and is connected with an external load through the lead 19, that is, only the second piezoelectric piece 16 is used as a power supply to be conducted with the external load;
continuing to move in the above manner, the third piezoelectric patch 17 and the fourth piezoelectric patch 18 are sequentially excited to generate electric quantity and are connected with an external load through a lead 19, and are sequentially used as a power supply to be conducted with the external load; and then the operation is repeated in a circulating way, and the switches are sequentially switched by the motion mode of the mechanical structure, so that each piezoelectric plate is sequentially excited to generate electric quantity and is connected with an external load through a lead 19, and the piezoelectric plates are sequentially used as a power supply to supply power for the external load, thereby realizing the function of time division multiplexing.
In summary, when the piezoelectric cantilever beams are circumferentially symmetrically arranged for a general piezoelectric energy collecting device, if a plurality of piezoelectric sheets are connected in parallel for output, the output power is reduced due to the phase difference; if a plurality of piezoelectric sheets are respectively used as power supplies to be connected to an external load, a plurality of independent input circuits and output circuits need to be arranged, so that the circuit complexity, the manufacturing cost and the like of the device are improved, and the problems of phase difference, circuit complexity, high cost and the like in the background art can be effectively solved.
The above description is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any person skilled in the art can make insubstantial changes in the technical scope of the present invention within the technical scope of the present invention, and the actions infringe the protection scope of the present invention are included in the present invention.
Claims (9)
1. A piezoelectric type energy collecting device with time division multiplexing is characterized by comprising a cavity, a transmission shaft, a shifting wheel, a cam, four push rods, four push rod supporting frames, four springs, four piezoelectric cantilever beams, four piezoelectric patches, a plurality of leads and four conductive switches, wherein the transmission shaft, the shifting wheel, the cam, the four push rods, the four push rod supporting frames, the four springs, the four piezoelectric cantilever beams, the four piezoelectric patches, the leads and the four conductive switches are;
one end of the transmission shaft is matched with the bottom of the cavity, and the other end of the transmission shaft is matched with the top of the cavity; the dial wheel and the cam are sequentially coaxially linked with the transmission shaft from top to bottom; one end of the push rod is connected with the cam, and when the cam rotates, the push rod makes reciprocating linear movement; one end of the push rod, which is far away from the cam, is fixed on a push rod supporting frame, one end of the push rod, which is connected with the cam, is provided with a retaining ring, the other end of the push rod is provided with a concave groove, and a conductive layer is coated on the upper inner wall and the lower inner wall of the concave groove and the local positions of the upper outer surface and the lower outer surface of the push rod; the spring is sleeved on the push rod and arranged between the baffle ring and the push rod support frame, one end of the push rod support frame is fixed at the bottom of the cavity, and the other end of the push rod support frame supports the push rod; one end of the piezoelectric cantilever beam is fixed with the cavity, and the other end of the piezoelectric cantilever beam is a free end; the piezoelectric sheet is attached to the surface of the piezoelectric cantilever; the conductive switch is fixed on the inner wall of the cavity, the positive electrode and the negative electrode of one end of the conductive switch are connected with the positive electrode and the negative electrode of the piezoelectric sheet through leads, and the other end of the conductive switch is in sliding connection with the positive electrode and the negative electrode of the conductive layers on the upper inner wall and the lower inner wall of the concave groove;
a shifting sheet is arranged on the side surface of the shifting wheel; the symmetry line of the shifting piece in the horizontal direction and the symmetry line of the cam in the horizontal direction are positioned on the same plane, and the shifting piece and the convex part of the cam face towards the same direction and are arranged in a linkage manner with the transmission shaft; when the transmission shaft rotates, the thumb wheel and the cam rotate around the axis of the transmission shaft synchronously.
2. The piezoelectric energy harvesting device with time division multiplexing according to claim 1, wherein the conductive layers on the upper and lower outer surfaces of the push rod are positive and negative respectively, and the positive electrode on the outer surface of the push rod is connected to a point by a lead as the positive electrode of the whole energy harvesting device, and the negative electrode on the outer surface of the push rod is connected to a point as the negative electrode of the whole energy harvesting device.
3. The time-multiplexed piezoelectric energy harvesting device of claim 2, wherein the piezoelectric cantilevers are symmetrically distributed inside the cavity; one end of the piezoelectric cantilever beam is fixed with the cavity, the other end of the piezoelectric cantilever beam abuts against the shifting piece of the shifting wheel along the rotating direction of the shifting wheel, and when the shifting wheel drives the shifting piece to rotate, the shifting piece abuts against the piezoelectric cantilever beam to enable the piezoelectric cantilever beam to deform.
4. The piezoelectric time-division multiplexing energy collecting device according to claim 3, wherein the energy collecting device is provided with four push rods, four piezoelectric cantilevers, four piezoelectric sheets, and four conductive switches; the first push rod, the second push rod, the third push rod, the fourth push rod, the first piezoelectric cantilever beam, the second piezoelectric cantilever beam, the third piezoelectric cantilever beam, the fourth piezoelectric cantilever beam, the first piezoelectric sheet, the second piezoelectric sheet, the third piezoelectric sheet, the fourth piezoelectric sheet, the first conductive switch, the second conductive switch, the third conductive switch and the fourth conductive switch are respectively arranged.
5. The piezoelectric energy collecting device with time division multiplexing according to claim 4, wherein in the process of rotation of the thumb wheel and the cam, the first piezoelectric cantilever beam is firstly beaten by the thumb piece and then generates free vibration, so that the first piezoelectric piece attached to the first piezoelectric cantilever beam is excited to generate electric quantity, the first push rod is forced by the outer contour of the cam to move the compression spring to the outer side of the cavity and contact with the first conductive switch, and a certain length of contact distance is kept, at this time, the second push rod, the third push rod and the fourth push rod are in a near-rest or return state and are respectively disconnected with the corresponding second conductive switch, the third conductive switch and the fourth conductive switch, at this time, only the first piezoelectric piece generates electric quantity and is connected with an external load through a lead, namely, only the first piezoelectric piece is used as a power supply and is connected with the external load;
when the thumb wheel continues to rotate and hit the second piezoelectric cantilever beam, the first push rod is in a return stroke state and gradually moves back under the action of the restoring force of the spring and is disconnected with the first conductive switch, the second piezoelectric cantilever beam generates free vibration after being hit, so that the second piezoelectric sheet attached to the second piezoelectric cantilever beam is excited to generate electric quantity, the second push rod is forced by the outer contour of the cam to compress the spring to move towards the outer side of the cavity and contact with the second conductive switch, and keeping a certain length of contact distance, at the moment, the first push rod, the third push rod and the fourth push rod are in a near-rest or return state and are respectively disconnected with the corresponding first conductive switch, the third conductive switch and the fourth conductive switch, at the moment, only the second piezoelectric patch generates electric quantity and is connected with an external load through a lead, namely, only the second piezoelectric patch is used as a power supply to be conducted with the external load;
continuing moving according to the mode, sequentially exciting the third piezoelectric sheet and the fourth piezoelectric sheet to generate electric quantity, connecting the electric quantity with an external load through a lead, and sequentially serving as a power supply to be conducted with the external load; and then the operation is repeated in a circulating way, and the switches are sequentially switched by the motion mode of the mechanical structure, so that each piezoelectric plate is sequentially excited to generate electric quantity and is connected with an external load through a lead, and the piezoelectric plates are sequentially used as a power supply to supply power for the external load, thereby realizing the function of time division multiplexing.
6. The piezoelectric time-multiplexed energy harvesting device according to claim 1, wherein the springs are cylindrical compression springs, and the number of the springs is the same as the number of the push rods, and increases with the increase of the number of the push rods.
7. The piezoelectric time-division multiplexing energy collecting device according to claim 1, wherein the push rod is a pointed push rod or a roller push rod or a flat bottom push rod.
8. The time-multiplexed piezoelectric energy harvesting device of claim 1, wherein the cam is embodied as a disc cam or a cylindrical cam.
9. The piezoelectric time-division multiplexing energy collecting device according to claim 1, wherein the pushrod support is an arch pushrod support.
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| CN109546889A (en) | 2019-03-29 |
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