Piezoelectric electromagnetic hybrid human body energy harvester

Abstract

The utility model discloses a piezoelectric electromagnetic hybrid human body energy harvester, belongs to the technical field of human body energy collection, and solves the problems of low human body low-frequency vibration output power and low energy recovery efficiency in the prior art. Comprising a waist fixing frame, the lower end of a position adjusting connecting rod arranged on the waist fixing frame is connected with an energy harvester inner side assembly, an energy harvester outer side assembly is fixedly arranged on the outer side of the energy harvester inner side assembly, and an energy harvesting rotor and an energy feedback unit are arranged between the energy harvester outer side assembly and the energy harvester inner side assembly; an energy harvesting driving swing arm is movably arranged on the outer side of the energy harvester outer side assembly and connected with the driving end of the energy harvesting rotor, and a leg fixing frame is arranged on a long connecting rod arranged at the extending end of the energy harvesting driving swing arm. The energy collection device is reasonable in design, compact in structure, capable of converting kinetic energy of a human body into electric energy, capable of improving output power in a composite energy collection mode, suitable for energy collection of various wireless sensors, convenient to wear, high in practicability and high in reliability.

Description

Technical Field

[0001] The utility model belongs to the technical field of human body energy collection, and in particular relates to a piezoelectric and electromagnetic hybrid human body energy harvester. Background Art

[0002] With the development of science and technology, more and more electronic devices are appearing in people's lives. The integration of integrated circuits and low-power technology has gradually reduced the power consumption required by electronic devices. Moreover, some devices related to the human body, such as smart clothing, artificial joints, and body health monitoring devices, require a stable and reliable energy source to maintain the operation of the devices and systems. However, due to the problems of limited life, inconvenient replacement, and environmental pollution of traditional chemical batteries in some cases, the demand for power supply is also developing in the direction of sustainability, self-powered, and pollution-free.

[0003] At present, the development of energy harvesting technology has provided us with a new source of power supply. According to different working principles, energy harvesting technology can be divided into electrostatic, piezoelectric, electromagnetic induction, and magnetostrictive; and then through the principle of energy conversion, the energy generated by different phenomena such as luminescence, heat, and vibration in the environment is converted into electrical energy using the above technologies for storage or utilization. At the same time, more and more researchers are gradually applying energy harvesting technology to the vibrations generated by the human body itself, collecting them and applying them to self-powered devices in some special cases, thereby realizing the normal use of wearable devices. However, since a single form of energy harvesting is sometimes difficult to meet the power required for the operation of the device, the output performance can only be maximized when the excitation frequency matches the natural frequency of the system, and the frequency of human movement is usually below 3Hz, and the resonance of the device and the excitation frequency cannot be achieved. Therefore, it is necessary to improve the energy collection method and device of low-frequency vibration of the human body in the existing technology. Utility Model Content

[0004] The utility model aims to solve the above-mentioned problems and provides a piezoelectric-electromagnetic hybrid human energy harvester which can convert human kinetic energy into electrical energy and improve the output power by means of composite energy collection. It can be suitable for energy collection of wireless sensors such as human health monitoring and charging of sports auxiliary equipment. It is easy to wear, highly practical and reliable.

[0005] The technical solution adopted by the utility model is: the piezoelectric electromagnetic hybrid human body energy harvester includes a waist fixing frame, characterized in that: a position adjustment connecting rod is arranged on the waist fixing frame, the lower end of the position adjustment connecting rod is connected to the inner group of the energy harvester, the outer group of the energy harvester is fixedly arranged on the outer side of the inner group of the energy harvester, and an energy harvesting rotor and an energy feeding unit are arranged between the outer group of the energy harvester and the inner group of the energy harvester, and an energy harvesting driving swing arm is movably arranged on the outer side of the outer group of the energy harvester, and the energy harvesting driving swing arm is connected to the driving end of the energy harvesting rotor; a long connecting rod is arranged at the extending end of the energy harvesting driving swing arm, and a leg fixing frame is arranged on the long connecting rod.

[0006] The waist fixing frame comprises a waist arc frame body, an adjusting rod connecting slot is arranged in the middle of the waist arc frame body, a position adjusting connecting rod is movably arranged in the adjusting rod connecting slot, and the adjusting rod connecting slot and the position adjusting connecting rod are respectively provided with position adjusting connecting holes; the waist arc frame body is provided with a plurality of groups of waist bandage perforations. The waist arc frame body is fixed at the waist position of the user by using the waist bandage arranged in the waist bandage perforations, and the distance between the waist fixing frame and the inner group of the energy harvester is adjusted by the alignment connection of the position adjusting connecting rod and the corresponding position adjusting connecting holes in the adjusting rod connecting slot, so as to facilitate the use of the device.

[0007] The leg fixing frame comprises a leg arc frame body, a long connecting rod connecting sleeve is arranged in the middle of the leg arc frame body, and a plurality of leg bandage perforations are arranged on the leg arc frame body. The leg arc frame body is movably mounted on the long connecting rod through the long connecting rod connecting sleeve, and the moving position of the leg fixing frame is limited by a sealing limiting nut arranged at the end of the long connecting rod; at the same time, the leg arc frame body is fixed to the user's leg by using the leg bandage arranged in the leg bandage perforation and the leg bandage positioning part.

[0008] The inner assembly of the energy harvester includes an inner end cover, an inner end cover cavity is arranged inside the inner end cover, an adjusting rod hinge seat is arranged at the upper end of the inner end cover, the adjusting rod hinge seat is connected to the end of the position adjusting connecting rod through an adjusting rod connecting head, and assembly ear plates are arranged on the left and right sides of the inner end cover respectively; correspondingly, the outer assembly of the energy harvester includes an outer end cover, an outer end cover cavity is arranged inside the outer end cover, a bearing mounting slot for arranging a rotating bearing is arranged in the middle of the bottom of the outer end cover cavity, and assembly ear plates are also arranged on the left and right sides of the outer end cover respectively; and the energy harvesting rotor is rotatably arranged in a closed cavity composed of the inner end cover cavity and the outer end cover cavity, and the energy feeding unit is arranged in the closed cavity and around the energy harvesting rotor. The inner assembly and the outer assembly of the energy harvester are assembled together by using the assembly ear plate, and the energy harvester rotor and the energy feeding unit are respectively arranged in the closed cavity, and the rotating bearing of the energy harvester rotor is arranged in the bearing mounting slot of the outer assembly of the energy harvester, so that the energy capture driving swing arm can drive the energy harvester rotor to rotate, generate energy conversion with the energy feeding unit, and then store or utilize the converted electrical energy.

[0009] The energy capture driving swing arm includes a swing arm body, which is fixedly connected to the rotor body in the middle of the energy capture rotor, and a rotating bearing is arranged between the rotor body and the outer group of the energy capture device; a plurality of groups of rotor cantilever beams are evenly distributed on the rotor body, one end of the rotor cantilever beam is connected to the rotor body through an L-shaped connecting clamp, and the other end of the rotor cantilever beam is respectively provided with a rotor permanent magnet; a long connecting rod hinge seat is also arranged at one end of the swing arm body, and the long connecting rod hinge seat is connected to the end of the long connecting rod through a long connecting rod connector. The swing arm body of the energy capture driving swing arm is driven to drive the energy capture rotor to reciprocate together through the leg fixing frame arranged on the long connecting rod, so that the rotor permanent magnets at the ends of each group of rotor cantilever beams are used to generate energy conversion with the energy feeding unit.

[0010] The energy feeding unit includes an electromagnetic energy collection unit and a piezoelectric energy collection unit, and utilizes the electromagnetic and piezoelectric composite energy collection method to effectively improve the output power of the energy harvesting device.

[0011] The electromagnetic energy collection unit includes a plurality of groups of electromagnetic coils evenly arranged on the inner side walls of the inner end cover cavity and the outer end cover cavity, and the electromagnetic coils are respectively fixed in the coil positioning slots on the inner side walls of the cavity. In the process of the rotor cantilever beam rotating with the swing of the energy capture driving swing arm, the staggered motion generated between the rotor permanent magnet at the end of the rotor cantilever beam and the electromagnetic coil fixedly arranged on the inner side wall of the cavity is used to make the electromagnetic coil generate an induced electromotive force, and the output end of the electromagnetic coil is connected to the wireless sensor through a rectifier filter voltage stabilization circuit to power it.

[0012] The middle part of the inner end cover of the inner assembly of the energy harvester is provided with a wire through hole, and the outer surface of the inner end cover is also provided with a plurality of wire arrangement grooves evenly arranged in the radial direction, so that the wires of the output ends of each group of electromagnetic coils can be passed through the wire through holes and arranged in the corresponding wire arrangement grooves, which facilitates the connection of the wires and ensures the reliability of the device.

[0013] The piezoelectric energy collection unit includes a cantilever piezoelectric sheet arranged on a rotor cantilever beam of an energy-harvesting rotor. The cantilever piezoelectric sheet on the rotor generates a piezoelectric effect through the rotation of the rotor cantilever beam with the swing of the energy-harvesting driving swing arm, and the output end of the cantilever piezoelectric sheet is connected to the wireless sensor by a rectifier, filter and voltage stabilization circuit to supply power to the wireless sensor.

[0014] A plurality of groups of inner fixed permanent magnets evenly distributed on the same circumference are arranged in the inner end cover cavity of the inner assembly of the energy harvester. Correspondingly, a plurality of groups of outer fixed permanent magnets evenly distributed on the same circumference are arranged in the outer end cover cavity of the outer assembly of the energy harvester. The number and arrangement positions of the outer fixed permanent magnets correspond to those of the inner fixed permanent magnets, and the outer fixed permanent magnets and the inner fixed permanent magnets are arranged in a mutually exclusive manner. When the rotor cantilever beam rotates with the swing of the energy-harvesting driving swing arm, the rotor permanent magnet at the end of the rotor cantilever beam will be subjected to the repulsive force of the inner fixed permanent magnet and the outer fixed permanent magnet, thereby causing the rotor cantilever beam to continuously reciprocate and stimulate the piezoelectric effect of the cantilever piezoelectric sheet; at the same time, the rotor permanent magnet will continue to sweep across the electromagnetic coil on the inner wall of the cavity and in the coil positioning slot, causing the electromagnetic coil to generate an induced electromotive force and discharge, thereby realizing the recovery of electromagnetic energy. When the device is running, the electromagnetic energy collection unit and the piezoelectric energy collection unit together constitute the energy feeding unit of the human body energy harvester and power the wireless device.

[0015] The beneficial effects of the utility model are as follows: since the utility model adopts a waist fixing frame, a position adjusting connecting rod is arranged on the waist fixing frame, the lower end of the position adjusting connecting rod is connected to the inner assembly of the energy harvester, the outer assembly of the energy harvester is fixedly arranged on the outer side of the inner assembly of the energy harvester, an energy harvesting rotor and an energy feeding unit are arranged between the outer assembly of the energy harvester and the inner assembly of the energy harvester; an energy harvesting driving swing arm is movably arranged on the outer side of the outer assembly of the energy harvester, the energy harvesting driving swing arm is connected to the driving end of the energy harvesting rotor, a long connecting rod is arranged at the extending end of the energy harvesting driving swing arm, and the long connecting rod The leg fixing frame is arranged on the upper part, so the design is reasonable and the structure is compact. The device is worn on the human body, and the swing of the human legs is used to drive the energy capture drive swing arm and the energy capture rotor to rotate. In the process of rotation of the energy capture rotor, the human body's kinetic energy is converted into electrical energy through the energy feeding unit to power the wireless sensor. At the same time, the output power is increased by the composite energy collection method, which can be suitable for energy collection of wireless sensors such as human health monitoring and charging of sports auxiliary equipment. It is light in weight, easy to process, easy to wear, strong in practicality and high in reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 yes Figure 1 A schematic diagram of the structure on the rear side.

[0018] Figure 3 yes Figure 1 Schematic diagram of an explosion structure.

[0019] Figure 4 yes Figure 3 A schematic diagram of the structure of the inner assembly of the energy harvester.

[0020] Figure 5 yes Figure 4 Rear view of.

[0021] Figure 6 yes Figure 3 A schematic diagram of the structure of the outer assembly of the energy harvester.

[0022] Figure 7 yes Figure 3 Schematic diagram of a connection structure between the energy capture drive swing arm and the energy capture rotor.

[0023] Figure 8 yes Figure 7 Schematic diagram of a connection structure among the energy harvesting driving swing arm, the energy harvesting rotor and the outer assembly of the energy harvester.

[0024] Explanation of the numbers in the figure: 1 waist fixing frame, 2 position adjustment connecting rod, 3 adjustment rod connector, 4 energy capture device inner assembly, 5 energy capture device outer assembly, 6 energy capture drive swing arm, 7 long connecting rod connector, 8 leg fixing frame, 9 long connecting rod, 10 sealing limit nut, 11 energy capture rotor, 12 energy feedback unit, 13 rotating bearing, 14 waist arc frame, 15 adjustment rod connecting slot, 16 position adjustment connecting hole, 17 waist bandage perforation, 18 connecting short rod, 19 leg arc frame, 20 long connecting rod Connecting sleeve, 21 leg bandage perforation, 22 leg bandage positioning part, 23 inner end cover, 24 inner end cover cavity, 25 wire perforation, 26 coil positioning slot, 27 electromagnetic coil, 28 inner fixed permanent magnet, 29 adjustment rod hinge seat, 30 assembly ear plate, 31 wire arrangement slot, 32 permanent magnet auxiliary disassembly hole, 33 outer end cover, 34 outer end cover cavity, 35 bearing installation slot, 36 outer fixed permanent magnet, 37 swing arm body, 38 long connecting rod hinge seat, 39 rotor body, 40 L-shaped connecting splint, 41 rotor cantilever beam, 42 rotor permanent magnet, 43 cantilever piezoelectric sheet. DETAILED DESCRIPTION

[0025] according to Figures 1 to 8 The specific structure of the utility model is described in detail. The piezoelectric electromagnetic hybrid human energy harvester includes a waist fixing frame 1, which is composed of a waist arc frame body 14 whose shape matches the waist of the user. An adjustment rod connecting slot 15 is arranged in the middle of the waist arc frame body 14, and a position adjustment connecting rod 2 is movably arranged in the adjustment rod connecting slot 15; and corresponding position adjustment connecting holes 16 are arranged in the adjustment rod connecting slot 15 and on the position adjustment connecting rod 2. The waist arc frame body 14 is provided with a plurality of groups of waist bandage perforations 17 (such as Figure 3 Furthermore, the waist arc frame 14 is fixed to the waist position of the user by using the waist bandage arranged in the waist bandage through-hole 17, and the distance between the waist fixing frame 1 and the inner side assembly 4 of the energy harvester is adjusted by the alignment connection of the position adjustment connecting rod 2 and the corresponding position adjustment connection hole 16 in the adjustment rod connection slot 15, so as to facilitate the use of the device.

[0026] The lower end of the position adjustment link 2 is connected to the inner assembly 4 of the energy harvester, and the outer assembly 5 of the energy harvester is fixedly arranged outside the inner assembly 4 of the energy harvester, and the energy harvester rotor 11 and the energy feeding unit 12 are arranged between the outer assembly 5 of the energy harvester and the inner assembly 4 of the energy harvester. The outer side of the outer assembly 5 of the energy harvester is also movably provided with an energy harvesting driving swing arm 6, which is connected to the driving end of the energy harvesting rotor 11 (such as Figure 1 , Figure 2 and Figure 3 as shown).

[0027] The energy-harvesting driving swing arm 6 is composed of a swing arm body 37, which is fixedly connected to a rotor body 39 in the middle of the energy-harvesting rotor 11, and a rotating bearing 13 is arranged between the rotor body 39 and the outer assembly 5 of the energy-harvesting device. Several groups (for example, four groups) of rotor cantilever beams 41 are evenly distributed on the rotor body 39, one end of the rotor cantilever beam 41 is connected to the rotor body 39 through an L-shaped connecting clamp 40, and the other end of the rotor cantilever beam 41 is respectively provided with a rotor permanent magnet 42 (such as Figure 7 As shown). A long connecting rod hinge seat 38 is also provided at one end of the swing arm body 37, and the long connecting rod hinge seat 38 is connected to the end of a long connecting rod 9 on which a leg fixing bracket 8 is provided through a long connecting rod connector 7. Thus, the swing arm body 37 of the energy capture driving swing arm 6 is driven by the leg fixing bracket 8 provided on the long connecting rod 9 to drive the energy capture rotor 11 to reciprocate together, so as to utilize the rotor permanent magnets 42 at the ends of each group of rotor cantilever beams 41 to generate energy conversion with the energy feeding unit 12.

[0028] In addition, the inner assembly 4 of the energy harvester is composed of an inner end cover 23, an inner end cover cavity 24 is arranged inside the inner end cover 23, an adjusting rod hinge seat 29 is arranged at the upper end of the inner end cover 23, the adjusting rod hinge seat 29 is hinged to the adjusting rod connector 3, and the adjusting rod connector 3 is connected to the end of the position adjustment connecting rod 2 through the connecting short rod 18; the left and right sides of the inner end cover 23 are respectively provided with assembly ear plates 30; on the inner side wall of the inner end cover cavity 24 of the inner assembly 4 of the energy harvester, a plurality of groups of coil positioning slots 26 (such as Figure 4 Correspondingly, the outer assembly 5 of the energy harvester is composed of an outer end cover 33, an outer end cover cavity 34 is arranged inside the outer end cover 33, a bearing installation slot 35 for arranging the rotating bearing 13 is arranged in the middle of the bottom of the outer end cover cavity 34, and assembly ear plates 30 are also arranged on the left and right sides of the outer end cover 33; a plurality of groups of coil positioning slots 26 (such as Figure 6 as shown).

[0029] Furthermore, the energy harvesting rotor 11 is rotatably arranged in a closed cavity composed of the inner end cover cavity 24 of the inner assembly 4 of the energy harvester and the outer end cover cavity 34 of the outer assembly 5 of the energy harvester; the energy feeding unit 12 arranged in the closed cavity and around the energy harvesting rotor 11 includes an electromagnetic energy collection unit and a piezoelectric energy collection unit, so as to utilize the electromagnetic and piezoelectric composite energy collection method to effectively improve the output power of the energy harvesting device; and, the inner assembly 4 of the energy harvester and the outer assembly 5 of the energy harvester are assembled together by assembling the ear plate 30, and the energy harvesting rotor 11 and the energy feeding unit 12 are respectively arranged in the closed cavity, and the rotating bearing 13 of the energy harvesting rotor 11 is arranged in the bearing mounting groove 35 of the outer assembly 5 of the energy harvester (such as Figure 8As shown), the energy capture driving swing arm 6 drives the energy capture rotor 11 to rotate, generates energy conversion with the energy feeding unit 12, and then stores or utilizes the converted electrical energy.

[0030] The electromagnetic energy collection unit of the energy feeding unit 12 includes several groups (e.g., eight groups) of electromagnetic coils 27 evenly arranged on the inner side walls of the inner end cover cavity 24 and the outer end cover cavity 34. The electromagnetic coils 27 are respectively fixed in the coil positioning slots 26 on the inner side walls of the cavity. According to specific use requirements, the winding skeleton of the electromagnetic coils 27 can adopt a traditional circular structure or a square structure that is convenient for fixed installation. Then, in the process of the rotor cantilever beam 41 rotating with the swing of the energy capture driving swing arm 6, the electromagnetic coil 27 generates an induced electromotive force by utilizing the staggered motion between the rotor permanent magnet 42 at the end of the rotor cantilever beam 41 and the electromagnetic coil 27 fixedly arranged on the inner side wall of the cavity, and the output end of the electromagnetic coil 27 is connected to the wireless sensor through a rectifier filter voltage stabilization circuit to power it. It can be understood that, according to specific use requirements, the induced electromotive force can also be generated by adjusting the air gap between the rotor permanent magnet 42 at the end of the rotor cantilever beam 41 and the electromagnetic coil 27, so as to realize electromagnetic energy recovery. At the same time, a wire through hole 25 is provided in the middle of the inner end cover 23 of the inner assembly 4 of the energy harvester, and a plurality of wire arrangement grooves 31 (such as Figure 5 As shown); the wires at the output ends of each group of electromagnetic coils 27 are passed through the wire through-holes 25 and arranged in the corresponding wire arrangement grooves 31, respectively, to facilitate the connection of the wires and ensure the reliability of the device.

[0031] The piezoelectric energy collection unit of the energy feeding unit 12 includes a cantilever piezoelectric piece 43 arranged on the vertical side surface of the rotor cantilever beam 41 of the energy capturing rotor 11. The cantilever piezoelectric piece 43 can be arranged on one side or on both sides. The cantilever piezoelectric piece 43 on the cantilever beam 41 generates a piezoelectric effect through the rotation of the rotor cantilever beam 41 as the energy capturing driving swing arm 6 swings. The output end of the cantilever piezoelectric piece 43 is connected to the wireless sensor by a rectifier, filter and voltage stabilization circuit to power it.

[0032] In the inner end cover cavity 24 of the inner assembly 4 of the energy harvester, there are arranged several groups (e.g., eight groups) of inner fixed permanent magnets 28 evenly distributed on the same circumference; correspondingly, in the outer end cover cavity 34 of the outer assembly 5 of the energy harvester, there are also arranged several groups (e.g., eight groups) of outer fixed permanent magnets 36 evenly distributed on the same circumference (e.g., Figure 4 and Figure 6As shown in FIG. 1 ); the inner end cap 23 of the inner assembly 4 of the energy harvester and the outer end cap 33 of the outer assembly 5 of the energy harvester are respectively provided with a plurality of groups of permanent magnet auxiliary disassembly holes 32, the positions of which correspond to the inner fixed permanent magnets 28 and the outer fixed permanent magnets 36. Moreover, the number and the setting positions of the outer fixed permanent magnets 36 correspond to those of the inner fixed permanent magnets 28, and the outer fixed permanent magnets 36 and the inner fixed permanent magnets 28 are arranged in a mutually exclusive manner; and then the magnetic tuning method is introduced to change the mechanical strain of the rotor cantilever beam 41 and improve the power generation efficiency.

[0033] Thus, when the rotor cantilever beam 41 rotates with the swing of the energy-harvesting driving swing arm 6, the rotor permanent magnet 42 at the end of the rotor cantilever beam 41 will be subjected to the repulsive force of the inner fixed permanent magnet 28 and the outer fixed permanent magnet 36, so that the rotor cantilever beam 41 continuously reciprocates, stimulating the piezoelectric effect of the cantilever piezoelectric sheet 43; and by adjusting the gap between the inner fixed permanent magnet 28 and the outer fixed permanent magnet 36, the stiffness of the rotor cantilever beam 41 of the energy-harvesting rotor 11 is changed to achieve different degrees of reciprocating motion of the rotor cantilever beam 41. At the same time, the rotor permanent magnet 42 will continue to sweep over the electromagnetic coil 27 on the inner wall of the cavity and in the coil positioning slot 26, so that the electromagnetic coil 27 generates an induced electromotive force and discharges, thereby realizing the recovery of electromagnetic energy. When the device is running, the electromagnetic energy collection unit and the piezoelectric energy collection unit together constitute the energy feeding unit 12 of the human energy harvester and power the wireless device; the device can be used for human health monitoring and charging of low-power sports auxiliary equipment.

[0034] The long connecting rod hinge seat 38 of the energy capture driving swing arm 6 is provided with a long connecting rod 9 through a long connecting rod connector 7, and a leg fixing frame 8 is provided on the long connecting rod 9. The end of the extended end of the long connecting rod 9 is provided with a sealing limit nut 10. The leg fixing frame 8 is composed of a leg arc frame body 19 whose shape matches the user's leg. A long connecting rod connecting sleeve 20 is provided in the middle of the leg arc frame body 19. A plurality of leg bandage perforations 21 and leg bandage positioning parts 22 (such as Figure 3 The leg arc frame 19 is then movably mounted on the long connecting rod 9 through the long connecting rod connecting sleeve 20, and the sealing limit nut 10 arranged at the end of the long connecting rod 9 is used to limit the moving position of the leg fixing frame 8; at the same time, the leg arc frame 19 is fixed to the user's leg by the leg bandage arranged in the leg bandage perforation 21 and the leg bandage positioning part 22, so that the energy capture driving swing arm 6 connected to the end of the long connecting rod 9 is driven by the user's leg.

[0035] When the piezoelectric-electromagnetic hybrid human energy harvester is used, first, the waist bandage arranged in the waist bandage perforation 17 is used to fix the waist arc frame 14 at the user's waist position, and the distance between the waist fixing frame 1 and the energy-capturing driving swing arm 6 (the inner assembly 4 of the energy harvester) is adjusted by the position adjustment connecting rod 2. Then, the leg arc frame 19 is fixed to the user's leg by the leg bandage arranged in the leg bandage perforation 21 and the leg bandage positioning part 22, and the position of the leg fixing frame 8 can be flexibly adjusted on the long connecting rod 9. Afterwards, during walking and moving, the user's legs will drive the energy-capturing driving swing arm 6 connected to the end of the long connecting rod 9 to swing back and forth, thereby driving the energy-capturing rotor 11 connected to the swing arm body 37 of the energy-capturing driving swing arm 6 to rotate back and forth together. Thus, in the process of the energy-harvesting rotor 11 rotating with the swing of the energy-harvesting driving swing arm 6, the staggered motion between the rotor permanent magnet 42 at the end of the rotor cantilever beam 41 and the electromagnetic coil 27 on the inner wall of the inner assembly 4 and the outer assembly 5 of the energy harvester is utilized to generate an induced electromotive force in the electromagnetic coil 27; and the cantilever piezoelectric sheet 43 on the rotor cantilever beam 41 generates a piezoelectric effect, so that the output ends of the electromagnetic coil 27 and the cantilever piezoelectric sheet 43 are respectively connected to the wireless sensor through a rectifier, filter and voltage stabilization circuit to supply power to it.

[0036] Moreover, when the rotor cantilever beam 41 rotates with the swing of the energy-harvesting driving swing arm 6, the rotor permanent magnet 42 at the end of the rotor cantilever beam 41 is subjected to the repulsive force of the inner fixed permanent magnet 28 and the outer fixed permanent magnet 36, thereby causing the rotor cantilever beam 41 to continuously reciprocate and stimulate the piezoelectric effect of the cantilever piezoelectric sheet 43. The energy harvester can be used to capture the movement of the human hip joint, using an electromagnetic and piezoelectric composite energy collection method to increase the output power, and introducing a magnetic tuning method to change the mechanical strain of the rotor cantilever beam 41, so that the rotor cantilever beam 41 produces a larger deformation amount, thereby improving the power generation efficiency. In addition, by adjusting the spacing between the inner fixed permanent magnet 28 and the outer fixed permanent magnet 36 to adjust the magnetic field strength, it can be applied to energy collection under different acceleration excitations, broaden the frequency bandwidth, increase the output power, and effectively solve the problem of low energy recovery efficiency of human body movement.

Claims

1. A piezoelectric-electromagnetic hybrid human energy harvester, comprising a waist fixing frame (1), characterized in that: The waist fixing frame (1) is provided with a position adjustment connecting rod (2), the lower end of the position adjustment connecting rod (2) is connected to the inner assembly (4) of the energy harvester, the outer assembly (5) of the energy harvester is fixedly provided on the outer side of the inner assembly (4), and an energy harvester rotor (11) and an energy feeding unit (12) are provided between the outer assembly (5) of the energy harvester and the inner assembly (4), and an energy harvester driving swing arm (6) is movably provided on the outer side of the energy harvester, the energy harvester driving swing arm (6) being connected to the driving end of the energy harvester rotor (11); a long connecting rod (9) is provided at the extended end of the energy harvester driving swing arm (6), and a leg fixing frame (8) is provided on the long connecting rod (9).

2. The piezoelectric-electromagnetic hybrid human energy harvester according to claim 1, characterized in that: The waist fixing frame (1) comprises a waist arc frame body (14), a middle part of which is provided with an adjusting rod connecting slot (15), a position adjusting connecting rod (2) being movably provided in the adjusting rod connecting slot (15), and position adjusting connecting holes (16) being respectively provided in the adjusting rod connecting slot (15) and on the position adjusting connecting rod (2); and a plurality of groups of waist bandage perforations (17) are provided on the waist arc frame body (14).

3. The piezoelectric-electromagnetic hybrid human energy harvester according to claim 1, characterized in that: The leg fixing frame (8) comprises a leg arc-shaped frame body (19), a long connecting rod connecting sleeve (20) is arranged in the middle of the leg arc-shaped frame body (19), and a plurality of groups of leg bandage perforations (21) are arranged on the leg arc-shaped frame body (19).

4. The piezoelectric-electromagnetic hybrid human energy harvester according to claim 1, characterized in that: The energy harvester inner assembly (4) comprises an inner end cover (23), an inner end cover cavity (24) is arranged inside the inner end cover (23), an adjustment rod hinge seat (29) is arranged at the upper end of the inner end cover (23), the adjustment rod hinge seat (29) is connected to the end of the position adjustment connecting rod (2) through the adjustment rod connector (3), and assembly ear plates (30) are respectively arranged on the left and right sides of the inner end cover (23); correspondingly, the energy harvester outer assembly (5) comprises an outer end cover (33), the outer end cover ( An outer end cover cavity (34) is provided inside the outer end cover cavity (33), a bearing mounting slot (35) for arranging a rotating bearing (13) is provided in the middle of the bottom of the outer end cover cavity (34), and assembly ear plates (30) are also provided on the left and right sides of the outer end cover (33); and the energy capture rotor (11) is rotatably arranged in a closed cavity composed of the inner end cover cavity (24) and the outer end cover cavity (34), and the energy feedback unit (12) is arranged in the closed cavity and around the energy capture rotor (11).

5. The piezoelectric-electromagnetic hybrid human energy harvester according to claim 1, characterized in that: The energy capture driving swing arm (6) comprises a swing arm body (37), the swing arm body (37) being fixedly connected to a rotor body (39) in the middle of the energy capture rotor (11), and a rotating bearing (13) being arranged between the rotor body (39) and the outer assembly (5) of the energy capture device; a plurality of groups of rotor cantilever beams (41) are evenly distributed on the rotor body (39), one end of the rotor cantilever beam (41) is connected to the rotor body (39) via an L-shaped connecting clamp (40), and the other end of the rotor cantilever beam (41) is respectively provided with a rotor permanent magnet (42); a long connecting rod articulated seat (38) is also arranged at one end of the swing arm body (37), and the long connecting rod articulated seat (38) is connected to the end of a long connecting rod (9) via a long connecting rod connector (7).

6. The piezoelectric-electromagnetic hybrid human energy harvester according to claim 4, characterized in that: The energy feeding unit (12) comprises an electromagnetic energy collection unit and a piezoelectric energy collection unit.

7. The piezoelectric-electromagnetic hybrid human energy harvester according to claim 6, characterized in that: The electromagnetic energy collection unit comprises a plurality of groups of electromagnetic coils (27) evenly arranged on the inner side walls of the inner end cover cavity (24) and the outer end cover cavity (34), and the electromagnetic coils (27) are respectively fixed in coil positioning slots (26) on the inner side walls of the cavities.

8. The piezoelectric-electromagnetic hybrid human energy harvester according to claim 7, characterized in that: A wire through hole (25) is provided in the middle of the inner end cover (23) of the inner assembly (4) of the energy harvester, and a plurality of groups of wire arrangement grooves (31) evenly arranged in the radial direction are also provided on the outer surface of the inner end cover (23).

9. The piezoelectric-electromagnetic hybrid human energy harvester according to claim 6, characterized in that: The piezoelectric energy collection unit comprises a cantilever piezoelectric sheet (43) arranged on a rotor cantilever beam (41) of an energy-harvesting rotor (11).

10. The piezoelectric-electromagnetic hybrid human energy harvester according to claim 9, characterized in that: A plurality of groups of inner fixed permanent magnets (28) evenly distributed on the same circumference are arranged in the inner end cover cavity (24) of the inner assembly (4) of the energy harvester, and correspondingly, a plurality of groups of outer fixed permanent magnets (36) evenly distributed on the same circumference are arranged in the outer end cover cavity (34) of the outer assembly (5) of the energy harvester; the number and arrangement positions of the outer fixed permanent magnets (36) correspond to those of the inner fixed permanent magnets (28), and the outer fixed permanent magnets (36) and the inner fixed permanent magnets (28) are arranged in a mutually exclusive manner.

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