Knee bending electromagnetic friction self-powered wireless self-transmission device and system

Abstract

The application discloses a knee bending electromagnetic friction self-powered wireless self-sensing device and system, and belongs to the self-powered wireless sensing field.The knee bending electromagnetic friction self-powered wireless self-sensing device comprises a first connecting plate, a second connecting plate, a triboelectric signal generating assembly, a power generating assembly and a wireless sensing assembly.The first connecting plate is movably connected with the second connecting plate, and the first connecting plate and the second connecting plate can move away from each other or move close to each other.The first connecting plate has a first surface away from the second connecting plate, and the second connecting plate has a second surface away from the first connecting plate.At least one of the first surface and the second surface is provided with the triboelectric signal generating assembly.One of the first connecting plate and the second connecting plate is fixedly connected with the power generating assembly, and the other is drivingly connected with the power generating assembly, for driving the power generating assembly to operate.The wireless sensing assembly is electrically connected with the triboelectric signal generating assembly and the power generating assembly respectively.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of self-powered wireless sensing, and particularly relates to a knee bending electromagnetic friction self-powered wireless self-sensing device and system. BACKGROUND

[0002] With the development of science and technology, the awareness of health is becoming stronger and stronger, especially for the health of the elderly, which is very important for a family. Usually, the legs of the elderly need to be monitored, that is, the bending of the legs of the elderly is monitored. In the related art, the bending of the legs is monitored by wearing a monitoring device on the legs of the elderly. However, in the related art, the monitoring device is usually difficult to use and requires additional power supply. SUMMARY

[0003] The purpose of the embodiments of the application is to provide a knee bending electromagnetic friction self-powered wireless self-sensing device and system, which at least solves the problem that the monitoring device is usually difficult to use and requires additional power supply.

[0004] In a first aspect, the embodiments of the application provide a knee bending electromagnetic friction self-powered wireless self-sensing device, which comprises a first connecting plate, a second connecting plate, a triboelectric signal generating assembly, a power generation assembly, and a wireless sensing assembly.

[0005] The first connecting plate and the second connecting plate are movably connected, and the first connecting plate and the second connecting plate can move away from each other or move close to each other. The first connecting plate has a first surface away from the second connecting plate, and the second connecting plate has a second surface away from the first connecting plate. At least one of the first surface and the second surface is provided with the triboelectric signal generating assembly.

[0006] One of the first connecting plate and the second connecting plate is fixedly connected with the power generation assembly, and the other is drivingly connected with the power generation assembly for driving the power generation assembly to operate. The wireless sensing assembly is electrically connected with the triboelectric signal generating assembly and the power generation assembly, respectively. The first connecting plate is used to be connected to the thigh of a user, the second connecting plate is used to be connected to the lower leg of the user, the triboelectric signal generating assembly is used to be attached to the thigh and / or lower leg of the user, and the wireless sensing assembly is used to collect signals generated by the triboelectric signal generating assembly and send the signals outward.

[0007] Optionally, the knee bending electromagnetic friction self-powered wireless self-sensing device further comprises a rotating connecting piece, the first connecting plate comprises a mounting portion and a connecting portion, the mounting portion is connected with the connecting portion, and the mounting portion is used to mount the triboelectric signal generating assembly.

[0008] The rotating connecting piece comprises a rotating sleeve and a rotating piece, at least part of the rotating piece is embedded in the rotating sleeve, and the rotating piece is fixedly connected with the rotating sleeve, the rotating sleeve is connected with the connecting part, the power generation assembly is connected with the rotating piece, and the power generation assembly is fixed on the second connecting plate;

[0009] When the first connecting plate and the second connecting plate are close to or away from each other, the first connecting plate drives the rotating sleeve and the rotating piece to rotate, and the rotating piece drives the power generation assembly to operate.

[0010] Optionally, the connecting part is provided with a mounting hole, and the rotating sleeve is arranged in the mounting hole.

[0011] The outer wall of the rotating sleeve is provided with at least two fixing plates, the connecting part is provided with at least two embedding grooves, the embedding grooves are communicated with the mounting hole, and one of the embedding grooves is embedded with one of the fixing plates.

[0012] Optionally, the power generation assembly has a power generation body and a rotating shaft, and the rotating shaft is connected with the power generation body through a gear assembly.

[0013] The rotating piece is provided with a rotating hole, and a blocking boss is arranged on the hole wall of the rotating hole, the rotating shaft is provided with a rotating groove, the rotating shaft is embedded in the rotating hole, and the blocking boss is embedded in the rotating groove.

[0014] Optionally, the second connecting plate comprises a connecting plate body.

[0015] The connecting plate body is provided with an avoiding groove, the rotating connecting piece is located in the avoiding groove, and a first gap is formed between the rotating connecting piece and the groove wall of the avoiding groove, a second gap is formed between part of the connecting part and the groove wall of the avoiding groove, the avoiding groove is used for accommodating another part of the connecting part, and the power generation assembly is fixed on the connecting plate body.

[0016] When the first connecting plate and the second connecting plate are close to each other, another part of the connecting part can enter the avoiding groove, and when the first connecting plate and the second connecting plate are away from each other, another part of the connecting part can be removed from the avoiding groove.

[0017] Optionally, the second connecting plate further comprises a mounting piece.

[0018] The mounting piece is fixed to the surface of the connecting plate body facing the first connecting plate, the mounting piece is provided with an embedding hole, and the power generation assembly is arranged in the embedding hole.

[0019] Optionally, the triboelectric signal generating assembly comprises a first electrode layer, a dielectric layer and a second electrode layer, the first electrode layer, the dielectric layer and the second electrode layer are arranged in a stack, at least one of the first surface and the second surface is connected to the second electrode layer.

[0020] Optionally, the first electrode layer is a flexible electrode layer.

[0021] Optionally, the knee bending electromagnetic friction self-powered wireless self-sensing device further comprises a power management module, the power management module is electrically connected to the power generation assembly, and the power management module is electrically connected to the wireless sensing assembly, the power management module is used for stabilizing voltage of the electric energy generated by the power generation assembly, and the electric energy after voltage stabilization is transmitted to the wireless sensing assembly.

[0022] Optionally, the knee bending electromagnetic friction self-powered wireless self-sensing device further comprises an energy storage assembly, the energy storage assembly is electrically connected to the power management module, and the energy storage assembly is electrically connected to the wireless sensing assembly.

[0023] In a second aspect, the embodiments of the present application provide a knee bending electromagnetic friction self-powered wireless self-sensing system, the knee bending electromagnetic friction self-powered wireless self-sensing system comprises a host computer and the knee bending electromagnetic friction self-powered wireless self-sensing device in any one of the first aspect.

[0024] The host computer is wirelessly connected to the wireless sensing assembly.

[0025] In the embodiment of the present application, the first connecting plate and the second connecting plate are movably connected, so that the first connecting plate and the second connecting plate can move away from or move close to each other. In addition, the first connecting plate has a first surface away from the second connecting plate, and the second connecting plate has a second surface away from the first connecting plate. At least one of the first surface and the second surface is provided with a triboelectric signal generating assembly. Therefore, in actual application, the first connecting plate can be connected to the thigh of a user, and the second connecting plate can be connected to the calf of the user. The triboelectric signal generating assembly on the first connecting plate and / or the second connecting plate can be in contact with the leg of the user. When the leg of the user bends, the thigh and the calf of the user move close to each other, thereby driving the first connecting plate and the second connecting plate to move close to each other. The leg of the user can press the triboelectric signal generating assembly, so that the triboelectric signal generating assembly generates a signal. One of the first connecting plate and the second connecting plate is fixedly connected to the power generation assembly, and the other is drivingly connected to the power generation assembly. Therefore, when the first connecting plate and the second connecting plate move close to each other, the connecting plate drivingly connected to the power generation assembly can drive the power generation assembly to operate, so that the power generation assembly generates electric energy. The wireless sensing assembly is electrically connected to the triboelectric signal generating assembly and the power generation assembly respectively. Therefore, once the first connecting plate is connected to the thigh of the user, and the second connecting plate is connected to the calf of the user, when the leg of the user bends, the first connecting plate and the second connecting plate move close to each other, i.e., the first connecting plate and the second connecting plate move relative to each other, so that the power generation assembly generates electric energy. The electric energy can be transmitted to the wireless sensing assembly, so that the wireless sensing assembly operates normally. The triboelectric signal generating assembly generates a signal and transmits the signal to the wireless sensing assembly, so that the wireless sensing assembly collects the signal generated by the triboelectric signal generating assembly and sends the signal outward. In the embodiment of the present application, by arranging the triboelectric signal generating assembly, the first connecting plate, the second connecting plate, the power generation assembly and the wireless sensing assembly, after the first connecting plate is connected to the thigh of the user and the second connecting plate is connected to the calf of the user, during the bending of the leg of the user, the wireless sensing assembly can send the signal generated by the triboelectric signal generating assembly outward in real time. Therefore, according to the signal sent by the wireless sensing assembly, the frequency and the bending angle of the bending of the leg of the user can be determined in real time, so that the activity of the leg of the user can be monitored. In addition, the whole device can realize self-power supply, so that an additional power supply is not needed, thereby reducing the cost. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 FIG. 1 shows a schematic diagram of a knee bending electromagnetic friction self-powered wireless self-sensing device according to an embodiment of the present application;

[0027] Figure 2 FIG. 2 shows an exploded view of a knee bending electromagnetic friction self-powered wireless self-sensing device according to an embodiment of the present application;

[0028] Figure 3 Fig. 2 shows a schematic diagram of a rotating connecting piece according to an embodiment of the present application;

[0029] Figure 4 Fig. 3 shows a schematic diagram of a first connecting plate according to an embodiment of the present application;

[0030] Figure 5 Fig. 4 shows a schematic diagram of a second connecting plate according to an embodiment of the present application;

[0031] Figure 6 Fig. 5 shows a schematic diagram of a knee bending electromagnetic friction self-powered wireless self-sensing device according to an embodiment of the present application;

[0032] Figure 7 Fig. 6 shows a schematic diagram of a circuit connection of a knee bending electromagnetic friction self-powered wireless self-sensing device according to an embodiment of the present application;

[0033] Figure 8 Fig. 7 shows a schematic diagram of a knee bending electromagnetic friction self-powered wireless self-sensing system according to an embodiment of the present application.

[0034] Reference signs:

[0035] 10: first connecting plate; 11: mounting portion; 12: connecting portion; 121: mounting hole; 122: embedding groove; 101: first surface; 20: second connecting plate; 21: connecting plate body; 22: mounting piece; 201: second surface; 211: avoiding groove; 221: embedding hole; 30: triboelectric signal generating assembly; 31: first electrode layer; 32: dielectric layer; 33: second electrode layer; 40: power generation assembly; 41: power generation body; 42: rotating shaft; 50: wireless sensing assembly; 60: rotating connecting piece; 61: rotating sleeve; 62: rotating piece; 611: fixing plate; 621: rotating hole; 622: blocking boss; 70: power management module; 80: energy storage assembly; 90: upper computer. DETAILED DESCRIPTION

[0036] The terms "first", "second" in the specification and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in an "or" relationship.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0039] like Figures 1 to 7 As shown, the knee bending electromagnetic friction self-powered wireless self-sensing device includes: a first connecting plate 10, a second connecting plate 20, a friction electric signal generating component 30, a power generation component 40 and a wireless sensing component 50; the first connecting plate 10 and the second connecting plate 20 are movably connected, and the first connecting plate 10 and the second connecting plate 20 can move away from or approach each other, the first connecting plate 10 has a first surface 101 away from the second connecting plate 20, the second connecting plate 20 has a second surface 201 away from the first connecting plate 10, and at least one of the first surface 101 and the second surface 201 is provided with a friction electric signal generating component 30, a power generation component 40 and a wireless sensing component 50; signal generating component 30; one of the first connecting plate 10 and the second connecting plate 20 is fixedly connected to the power generating component 40, and the other is drivingly connected to the power generating component 40, for driving the power generating component 40 to operate; the wireless sensing component 50 is electrically connected to the friction electric signal generating component 30 and the power generating component 40 respectively; the first connecting plate 10 is used to be connected to the user's thigh, and the second connecting plate 20 is used to be connected to the user's calf; the friction electric signal generating component 30 is used to fit the user's thigh and / or calf; the wireless sensing component 50 is used to collect the signal generated by the friction electric signal generating component 30 and send the signal outward.

[0040] In the embodiment of the present application, since the first connecting plate 10 and the second connecting plate 20 are movably connected, the first connecting plate 10 and the second connecting plate 20 can be moved away from or close to each other. In addition, the first connecting plate 10 has a first surface 101 away from the second connecting plate 20, the second connecting plate 20 has a second surface 201 away from the first connecting plate 10, and at least one of the first surface 101 and the second surface 201 is provided with a triboelectric signal generating assembly 30. Therefore, in actual application, the first connecting plate 10 can be connected to the thigh of a user, and the second connecting plate 20 can be connected to the calf of the user, so that the triboelectric signal generating assembly 30 on the first connecting plate 10 and / or the second connecting plate 20 can be in contact with the leg of the user. When the leg of the user is bent, the thigh of the user is close to the calf, so as to drive the first connecting plate 10 and the second connecting plate 20 to be close to each other, and the leg of the user can press the triboelectric signal generating assembly 30, so that the triboelectric signal generating assembly 30 generates a signal. Since one of the first connecting plate 10 and the second connecting plate 20 is fixedly connected with the power generation assembly 40, and the other is drivingly connected with the power generation assembly 40, when the first connecting plate 10 and the second connecting plate 20 are close to each other, the connecting plate drivingly connected with the power generation assembly 40 can drive the power generation assembly to operate, so that the power generation assembly 40 generates electric energy. Since the wireless sensing assembly 50 is electrically connected with the triboelectric signal generating assembly 30 and the power generation assembly 40 respectively, once the first connecting plate 10 is connected to the thigh of the user, and the second connecting plate 20 is connected to the calf of the user, when the leg of the user is bent, the first connecting plate 10 and the second connecting plate 20 are close to each other, i.e., the first connecting plate 10 and the second connecting plate 20 move relative to each other, so that the power generation assembly 40 generates electric energy, the electric energy can be transmitted to the wireless sensing assembly 50, so that the wireless sensing assembly 50 operates normally, the triboelectric signal generating assembly 30 generates a signal and transmits the signal to the wireless sensing assembly 50, so that the wireless sensing assembly 50 collects the signal generated by the triboelectric signal generating assembly 30 and sends the signal outward. That is, in the embodiment of the present application, by arranging the triboelectric signal generating assembly 30, the first connecting plate 10, the second connecting plate 20, the power generation assembly 40 and the wireless sensing assembly 50, after the first connecting plate 10 is connected to the thigh of the user and the second connecting plate 20 is connected to the calf of the user, the wireless sensing assembly 50 can send the signal generated by the triboelectric signal generating assembly 30 outward in real time during the bending of the leg of the user, so that the frequency and the bending angle of the bending of the leg of the user can be determined in real time according to the signal sent by the wireless sensing assembly 50, and the activity of the leg of the user can be monitored, and the whole device can realize self-power supply, so as to avoid additional power supply and increase the cost.

[0041] It should be noted that in the embodiments of the present application, the triboelectric signal generating assembly 30 can be arranged on the first surface 101 only, at this time, it is equivalent to arranging the triboelectric signal generating assembly 30 on the first connecting plate 10, so that when the user applies the knee bending electromagnetic friction self-powered wireless self-sensing device, the user's thigh squeezes the triboelectric signal generating assembly 30 on the first connecting plate 10 when the leg is bent; of course, the triboelectric signal generating assembly 30 can also be arranged on the second surface 201 only, at this time, it is equivalent to arranging the triboelectric signal generating assembly 30 on the second connecting plate 20, so that when the user applies the knee bending electromagnetic friction self-powered wireless self-sensing device, the user's calf squeezes the triboelectric signal generating assembly 30 on the second connecting plate 20 when the leg is bent; of course, the triboelectric signal generating assembly 30 can be arranged on the first surface 101 and the second surface 201, at this time, it is equivalent to arranging the triboelectric signal generating assembly 30 on the first connecting plate 10 and arranging the triboelectric signal generating assembly 30 on the second connecting plate 20, so that when the user applies the knee bending electromagnetic friction self-powered wireless self-sensing device, the user's thigh squeezes the triboelectric signal generating assembly 30 on the first connecting plate 10 and the user's calf squeezes the triboelectric signal generating assembly 30 on the second connecting plate 20 when the leg is bent.

[0042] In addition, in the embodiments of the present application, the first connecting plate 10 can be provided with a strap, and the second connecting plate 20 can also be provided with a strap, so that when the user uses the knee bending electromagnetic friction self-powered wireless self-sensing device, the first connecting plate 10 can be directly bound on the thigh by the strap, and the second connecting plate 20 can be bound on the calf by the strap, thereby facilitating the user to bend the knee of the electromagnetic friction self-powered wireless self-sensing device.

[0043] In addition, in the embodiments of the present application, in the first connecting plate 10 and the second connecting plate 20, the first connecting plate 10 can be drivingly connected with the power generating assembly 40, and the second connecting plate 20 can be fixedly connected with the power generating assembly 40, or the first connecting plate 10 can be fixedly connected with the power generating assembly 40, and the second connecting plate 20 can be drivingly connected with the power generating assembly 40. For this, the embodiments of the present application are not limited here.

[0044] In addition, in some embodiments, as Figure 2As shown, the knee-bending electromagnetic friction self-powered wireless self-transmission device can further comprise a rotating connecting piece 60, the first connecting plate 10 can comprise a mounting portion 11 and a connecting portion 12, the mounting portion 11 is connected with the connecting portion 12, and the mounting portion 11 is used for mounting the triboelectric signal generating assembly 30; the rotating connecting piece 60 comprises a rotating sleeve 61 and a rotating piece 62, at least part of the rotating piece 62 is embedded in the rotating sleeve 61, and the rotating piece 62 is fixedly connected with the rotating sleeve 61, the rotating sleeve 61 is connected with the connecting portion 12, the power generation assembly 40 is connected with the rotating piece 62, and the power generation assembly 40 is fixed on the second connecting plate 20; when the first connecting plate 10 and the second connecting plate 20 are close to or away from each other, the first connecting plate 10 drives the rotating sleeve 61 and the rotating piece 62 to rotate, and the rotating piece 62 drives the power generation assembly 40 to operate.

[0045] Since at least part of the rotating piece 62 is embedded in the rotating sleeve 61, and the rotating piece 62 is fixedly connected with the rotating sleeve 61, when the rotating sleeve 61 rotates, the rotating sleeve 61 will drive the rotating piece 62 to rotate. Since the rotating sleeve 61 is connected with the connecting portion 12, and the power generation assembly 40 is connected with the rotating piece 62, when the first connecting plate 10 and the second connecting plate 20 are away from or close to each other, the first connecting plate 10 will drive the rotating sleeve 61 to rotate, so that the rotating sleeve 61 will drive the rotating piece 62 to rotate, so that the rotating piece 62 can drive the power generation assembly 40 to operate, and the mounting portion 11 is used for mounting the triboelectric signal generating assembly 30, so that once the triboelectric signal generating assembly 30 is mounted on the mounting portion 11, when the user uses the knee-bending electromagnetic friction self-powered wireless self-transmission device, the user's thigh will contact the triboelectric signal generating assembly 30 when the user's leg is bent, and the user's leg drives the first connecting plate 10 and the second connecting plate 20 to be close to each other, so that the rotating sleeve 61 and the rotating piece 62 rotate, so that the rotating piece 62 drives the power generation assembly 40 to operate. That is, by setting the rotating connecting piece 60 to comprise the rotating sleeve 61 and the rotating piece 62, and the connecting portion 12 is connected with the rotating sleeve 61, the rotating piece 62 is connected with the power generation assembly 40, and the power generation assembly 40 is fixed on the second connecting plate 20, the first connecting plate 10 can be connected with the second connecting plate 20 through the rotating piece 62, the rotating sleeve 61 and the power generation assembly 40, and the first connecting plate 10 and the power generation assembly 40 are drivingly connected, and the second connecting plate 20 and the power generation assembly 40 are fixedly connected, so that the power generation assembly 40 can be operated when the user's leg is bent.

[0046] It should be noted that in the embodiments of the present application, the rotating member 62 and the rotating sleeve 61 can be gap-fitted, so that the rotating member 62 and the rotating sleeve 61 are fixedly connected. Of course, the manner in which the rotating member 62 and the rotating sleeve 61 are fixedly connected can also be other manners, for example, the rotating member 62 can also be welded with the rotating sleeve 61, so that the rotating member 62 and the rotating sleeve 61 are fixedly connected. For another example, the rotating member 62 and the rotating sleeve 61 are connected through bolts, so that the rotating member 62 and the rotating sleeve 61 are fixedly connected. In this regard, the embodiments of the present application are not limited here.

[0047] In addition, in some embodiments, as shown in Figure 2 、 Figure 3 and Figure 4 , the connecting portion 12 is provided with a mounting hole 121, and the rotating sleeve 61 is arranged in the mounting hole 121. The outer wall of the rotating sleeve 61 is provided with at least two fixing plates 611, and the connecting portion 12 is provided with at least two embedding grooves 122, which are communicated with the mounting hole 121, and one fixing plate 611 is embedded in one embedding groove 122.

[0048] Since the connecting portion 12 is provided with the mounting hole 121, when the knee bending electromagnetic friction self-powered wireless self-sensing device is assembled, the rotating sleeve 61 can be directly arranged in the mounting hole 121. In addition, the connecting portion 12 is provided with at least two embedding grooves 122, which are communicated with the mounting hole 121, and the outer wall of the rotating sleeve 61 is provided with at least two fixing plates 611, so that one fixing plate 611 can be embedded in one embedding groove 122. When the first connecting plate 10 and the second connecting plate 20 are close to or away from each other, the connecting portion 12 can drive the rotating sleeve 61 to rotate through the fixing plate 611, so that the rotating sleeve 61 drives the rotating member 62 to rotate, and then the rotating member 62 drives the power generation assembly 40 to operate. That is, by arranging the fixing plate 611 and the embedding groove 122 on the connecting portion 12, the first connecting plate 10 can drive the rotating sleeve 61 to rotate.

[0049] It should be noted that the outer wall of the rotating sleeve 61 and the at least two fixing plates 611 can be welded, and of course, the rotating sleeve 61 and the at least two fixing plates 611 can also be an integral structure. In this regard, the embodiments of the present application are not limited here.

[0050] In addition, in the embodiments of the present application, the number of fixing plates 611 can be set according to actual needs, for example, the number of fixing plates 611 is two, and for another example, the number of fixing plates 611 is three. In this regard, the embodiments of the present application are not limited here. The number of embedding grooves 122 can be equal to the number of fixing plates 611. In addition, the at least two fixing plates 611 can be distributed along the circumferential direction of the rotating sleeve 61.

[0051] In some embodiments, as shown in Figure 2 and Figure 3 The power generation assembly 40 has a power generation body 41 and a rotating shaft 42 connected with the power generation body 41 through a gear assembly. The rotating member 62 is provided with a rotating hole 621, and the hole wall of the rotating hole 621 is provided with a blocking boss 622. The rotating shaft 42 is provided with a rotating groove. The rotating shaft 42 is embedded in the rotating hole 621, and the blocking boss 622 is embedded in the rotating groove.

[0052] Since the rotating member 62 is provided with the rotating hole 621, the rotating shaft 42 can be embedded in the rotating hole 621, so that the rotating member 62 is connected with the power generation assembly 40. Since the hole wall of the rotating hole 621 is provided with the blocking boss 622, and the rotating shaft 42 is provided with the rotating groove, when the rotating shaft 42 is embedded in the rotating hole 621, the blocking boss 622 can be embedded in the rotating groove at the same time. Therefore, when the rotating sleeve 61 drives the rotating member 62 to rotate, the rotating member 62 can drive the blocking boss 622 to rotate, so that the blocking boss 622 drives the groove wall of the rotating groove to rotate, and the rotating shaft 42 rotates. That is, the rotating member 62 drives the rotating shaft 42 to rotate through the blocking boss 622, so that the gear assembly rotates and the power generation body 41 operates to generate power. That is, by providing the blocking boss 622 on the hole wall of the rotating hole 621, and providing the rotating groove on the rotating shaft 42, after the rotating shaft 42 is embedded in the rotating hole 621, the rotating member 62 can drive the rotating shaft 42 to rotate, so that the power generation assembly 40 operates and generates power.

[0053] It should be noted that the number of blocking bosses 622 on the hole wall of the rotating hole 621 can be set according to actual needs. For example, the number of blocking bosses 622 is 1, and for another example, the number of blocking bosses 622 is 2. The embodiments of the present application are not limited in this regard. When the number of blocking bosses 622 is multiple, the multiple blocking bosses 622 can be distributed along the circumferential direction of the rotating hole 621. In addition, the blocking boss 622 can extend along the axial direction of the rotating hole 621. In addition, the number of rotating grooves is equal to the number of blocking bosses 622.

[0054] In addition, in the embodiments of the present application, the hole wall of the rotating hole 621 can be provided with a blocking groove, and the outer wall of the rotating shaft 42 can be provided with a rotating boss. When the rotating shaft 42 is embedded in the rotating hole 621, the rotating boss can be embedded in the blocking groove. Therefore, when the rotating member 62 rotates, the rotating member 62 drives the blocking groove to rotate, and the groove wall of the blocking groove drives the rotating boss to rotate, so that the rotating shaft 42 rotates.

[0055] In addition, the gear assembly can include a plurality of gears, and the gear assembly can increase the frequency, i.e., by setting the gear assembly, the rotating speed of the rotating shaft 42 can be increased through the gear assembly, so that the rotating speed transmitted to the power generation body 41 is greater than the rotating speed of the rotating shaft 42. Wherein, the number of gears can be set according to actual needs, and the specific structure of the gear assembly can refer to the structure of the gear assembly with the frequency increasing function in the related art, which will not be described here.

[0056] In addition, in some embodiments, as shown in Figure 2 、 Figure 4 and Figure 5 , the second connecting plate 20 includes a connecting plate body 21; the connecting plate body 21 is provided with a avoiding slot 211, the rotating connecting piece 60 is located in the avoiding slot 211, and the rotating connecting piece 60 has a first gap with the slot wall of the avoiding slot 211, part of the connecting part 12 has a second gap with the slot wall of the avoiding slot 211, the avoiding slot 211 is used to accommodate the other part of the connecting part 12, and the power generation assembly 40 is fixed to the connecting plate body 21; in the case that the first connecting plate 10 and the second connecting plate 20 are close to each other, the connecting part 12 can enter the avoiding slot 211, and in the case that the first connecting plate 10 and the second connecting plate 20 are away from each other, the connecting part 12 can be removed from the avoiding slot 211.

[0057] Due to the avoidance groove 211 provided on the connecting plate body 21, the rotating connecting piece 60 is located in the avoidance groove 211, and the first gap is provided between the rotating connecting piece 60 and the groove wall of the avoidance groove 211, so that the rotating connecting piece 60 can rotate relative to the avoidance groove 211 after being stressed, and the rotation of the rotating connecting piece 60 is not affected. Due to the second gap provided between the part of the connecting portion 12 and the groove wall of the avoidance groove 211, the part of the connecting portion 12 can rotate relative to the avoidance groove 211 when being stressed, and the rotation of the connecting portion 12 is not affected, so that when the user uses the knee bending electromagnetic friction self-powered wireless self-sensing device, once the user connects the first connecting plate 10 to the thigh and connects the second connecting plate 20 to the calf, the connecting portion 12 can rotate relative to the second connecting plate 20 in the process of bending the leg of the user, and the first connecting plate 10 and the second connecting plate 20 approach or move away from each other. When the first connecting plate 10 and the second connecting plate 20 approach each other, the other part of the connecting portion 12 can enter the avoidance groove 211, so that the first connecting plate 10 and the second connecting plate 20 can be attached, and it is ensured that the first connecting plate 10 and the second connecting plate 20 can be attached as much as possible when the thigh and the calf of the user are attached as much as possible when the leg of the user is bent, and the problem that the knee bending electromagnetic friction self-powered wireless self-sensing device affects the bending of the leg of the user does not occur; when the first connecting plate 10 and the second connecting plate 20 move away from each other, the other part of the connecting portion 12 can move out of the avoidance groove 211, and the power generation assembly 40 is fixed to the connecting plate body 21, so that it can also be ensured that the power generation assembly 40 does not block the first connecting plate 10 and the second connecting plate 20 when the first connecting plate 10 and the second connecting plate 20 approach or move away from each other, and it is ensured that the first connecting plate 10 and the second connecting plate 20 can move away from each other or approach each other.

[0058] It should be noted that when the rotating connecting piece 60 includes the rotating sleeve 61 and the rotating piece 62, the first gap is provided between the end of the rotating piece 62 not embedded in the rotating sleeve 61 and the groove wall of the avoidance groove 211.

[0059] In addition, in some embodiments, as shown in Figure 2 and Figure 5 the second connecting plate 20 further includes a mounting piece 22; the mounting piece 22 is fixed to the surface of the connecting plate body 21 facing the first connecting plate 10, and the mounting piece 22 is provided with an embedded hole 221, and the power generation assembly 40 is arranged in the embedded hole 221.

[0060] Due to the mounting piece 22 being fixed to the surface of the connecting plate body 21 facing the first connecting plate 10, and the mounting piece 22 being provided with the embedded hole 221, when the knee bending electromagnetic friction self-powered wireless self-sensing device is assembled, the power generation assembly 40 can be directly arranged in the embedded hole 221, so that the knee bending electromagnetic friction self-powered wireless self-sensing device can be assembled more simply.

[0061] It should be noted that the mounting member 22 can be an integral structure with the connecting plate body 21, so that the second connecting plate 20 is stronger. Of course, the mounting member 22 can also be connected to the connecting plate body 21 by welding, which is not limited in this embodiment of the present application.

[0062] In addition, in the embodiment of the present application, the power generation component 40 can be fixed in the embedding hole 221. Specifically, the power generation component 40 can be bonded to the embedding hole 221 by adhesive. Of course, the power generation component 40 can also be fixed in the embedding hole 221 by fasteners such as bolts and pins. This embodiment of the present application is not limited to this.

[0063] Additionally, in some embodiments, Figure 2 As shown, the triboelectric signal generating component 30 includes a first electrode layer 31, a dielectric layer 32 and a second electrode layer 33. The first electrode layer 31, the dielectric layer 32 and the second electrode layer 33 are stacked, and at least one of the first surface 101 and the second surface 201 is connected to the second electrode layer 33; wherein, the first electrode layer 31 is a flexible electrode layer.

[0064] Because the first electrode layer 31, the dielectric layer 32, and the second electrode layer 33 are stacked, and at least one of the first surface 101 and the second surface 201 is connected to the second electrode layer 33, when a user uses the electromagnetic friction self-powered wireless self-sensing device by bending their knees, the user's leg compresses the first electrode layer 31, so that the first electrode layer 31, the dielectric layer 32, and the second electrode layer 33 can generate a signal and transmit it to the wireless sensing component 50. In addition, the first electrode layer 31 is a flexible electrode layer, which ensures that the user's leg feels comfortable when contacting the first electrode layer 31, thereby improving the user experience.

[0065] It should be noted that the flexible electrode layer may be a silicone electrode layer. In addition, the dielectric layer 32 and the second electrode layer 33 may also be flexible layers, so that when the user's legs contact the triboelectric signal generating assembly 30, the user can feel more comfortable and improve the user experience.

[0066] Additionally, in some embodiments, Figure 7 As shown, the knee bending electromagnetic friction self-powered wireless self-sensing device also includes a power management module 70, which is electrically connected to the power generation component 40, and the power management module 70 is electrically connected to the wireless sensing component 50. The power management module 70 is used to stabilize the electric energy generated by the power generation component 40, and transmit the stabilized electric energy to the wireless sensing component 50.

[0067] Since the power management module 70 is electrically connected with the power generation assembly 40 and the power management module 70 is electrically connected with the wireless sensing assembly 50, when the user uses the knee-bending electromagnetic friction self-powered wireless self-sensing device, once the user's leg is bent, the power generation assembly 40 can be driven to operate, so that the power generation assembly 40 generates electric energy, the electric energy generated by the power generation assembly 40 can be transmitted to the power management module 70, the power management module 70 can stabilize the voltage of the electric energy generated by the power generation assembly 40, and the stabilized electric energy is transmitted to the wireless sensing assembly 50, so as to ensure that the wireless sensing assembly 50 receives a relatively stable voltage and ensures that the wireless sensing assembly 50 operates relatively stably. That is, by arranging the power management module 70, the wireless sensing assembly 50 can operate relatively stably, and then the wireless sensing assembly 50 can relatively stably send signals to the outside.

[0068] It should be noted that the under-voltage lockout voltage range of the power management module 70 can be 3V to 8V. The under-voltage lockout means that when the input voltage is lower than a certain value, the power management module 70 does not work and is in a protection state. Of course, the under-voltage lockout voltage range of the power management module 70 can also be other numerical ranges, and the embodiments of the present application do not limit this.

[0069] In addition, in some embodiments, as shown in Figure 7 The knee-bending electromagnetic friction self-powered wireless self-sensing device further includes an energy storage assembly 80, the energy storage assembly 80 is electrically connected with the power management module 70, and the energy storage assembly 80 is electrically connected with the wireless sensing assembly 50.

[0070] Since the energy storage assembly 80 is electrically connected with the power management module 70 and the energy storage assembly 80 is electrically connected with the wireless sensing assembly 50, the power management module 70 can also transmit electric energy to the energy storage assembly 80, so that the energy storage assembly 80 can store electric energy, and then transmit the stored electric energy to the wireless sensing assembly 50, so that the wireless sensing assembly 50 can operate normally.

[0071] It should be noted that the energy storage assembly 80 can include but is not limited to energy storage capacitors, batteries, etc.

[0072] The embodiments of the present application provide a knee-bending electromagnetic friction self-powered wireless self-sensing system, as shown in Figure 8 The knee-bending electromagnetic friction self-powered wireless self-sensing system includes a host computer 90 and the knee-bending electromagnetic friction self-powered wireless self-sensing device in any of the above embodiments; the host computer 90 is wirelessly connected with the wireless sensing assembly 50.

[0073] The upper computer 90 is wirelessly connected with the wireless sensing assembly 50, so that the upper computer 90 can receive the signal transmitted by the wireless sensing assembly 50, so that when the user uses the knee bending electromagnetic friction self-powered wireless self-sensing device, the upper computer 90 can receive the signal transmitted by the wireless sensing assembly 50 in real time, and the upper computer 90 can determine the frequency and bending angle of the user's leg bending according to the received signal, and monitor the user in real time.

[0074] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0075] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A knee bending electromagnetic friction self-powered wireless self-sensing device, characterized in that: The knee bending electromagnetic friction self-powered wireless self-sensing device comprises: a first connecting plate, a second connecting plate, a triboelectric signal generating component, a power generation component and a wireless sensing component; The first connecting plate is movably connected to the second connecting plate, and the first connecting plate and the second connecting plate can move away from or approach each other. The first connecting plate has a first surface away from the second connecting plate, and the second connecting plate has a second surface away from the first connecting plate. The triboelectric signal generating component is provided on at least one of the first surface and the second surface. One of the first connecting plate and the second connecting plate is fixedly connected to the power generation component, and the other is drivingly connected to the power generation component to drive the power generation component to operate. The wireless sensing component is electrically connected to the triboelectric signal generating component and the power generation component respectively. The first connecting plate is used to be connected to the user's thigh, and the second connecting plate is used to be connected to the user's calf. The triboelectric signal generating component is used to fit the user's thigh and / or calf. The wireless sensing component is used to collect the signal generated by the triboelectric signal generating component and transmit the signal externally. The knee bending electromagnetic friction self-powered wireless self-sensing device further comprises a rotating connector, the first connecting plate comprises a mounting portion and a connecting portion, the mounting portion is connected to the connecting portion, and the mounting portion is used to mount the triboelectric signal generating component; The rotating connecting member includes a rotating sleeve and a rotating member, at least a portion of the rotating member is embedded in the rotating sleeve, and the rotating member is fixedly connected to the rotating sleeve, the rotating sleeve is connected to the connecting portion, the power generation component is connected to the rotating member, and the power generation component is fixed to the second connecting plate; When the first connecting plate and the second connecting plate are close to or away from each other, the first connecting plate drives the rotating sleeve and the rotating member to rotate, and the rotating member drives the power generation assembly to operate; The triboelectric signal generating component includes a first electrode layer, a dielectric layer, and a second electrode layer, wherein the first electrode layer, the dielectric layer, and the second electrode layer are stacked, and at least one of the first surface and the second surface is connected to the second electrode layer; Wherein, the first electrode layer is a flexible electrode layer.

2. The knee bending electromagnetic friction self-powered wireless self-sensing device according to claim 1, characterized in that: The connecting portion is provided with a mounting hole, and the rotating sleeve is arranged in the mounting hole; At least two fixing plates are provided on the outer wall of the rotating sleeve, and at least two embedding grooves are provided on the connecting portion. The embedding grooves are communicated with the mounting hole, and one of the embedding grooves is embedded with one fixing plate.

3. The knee bending electromagnetic friction self-powered wireless self-sensing device according to claim 1, characterized in that: The power generation assembly comprises a power generation body and a rotating shaft, wherein the rotating shaft is connected to the power generation body via a gear assembly; The rotating member is provided with a rotating hole, and a blocking boss is provided on the hole wall of the rotating hole. The rotating shaft is provided with a rotating groove. The rotating shaft is embedded in the rotating hole, and the blocking boss is embedded in the rotating groove.

4. The knee bending electromagnetic friction self-powered wireless self-sensing device according to claim 1, characterized in that: The second connecting plate includes a connecting plate body; The connecting plate body is provided with an avoidance groove, the rotating connecting member is located in the avoidance groove, and a first gap is formed between the rotating connecting member and the groove wall of the avoidance groove, and a second gap is formed between part of the connecting portion and the groove wall of the avoidance groove, the avoidance groove is used to accommodate another part of the connecting portion, and the power generation assembly is fixed to the connecting plate body; When the first connecting plate and the second connecting plate are close to each other, another part of the connecting portion can enter the avoidance groove. When the first connecting plate and the second connecting plate are away from each other, another part of the connecting portion can be moved out of the avoidance groove.

5. The knee bending electromagnetic friction self-powered wireless self-sensing device according to claim 4, characterized in that: The second connecting plate further includes a mounting member; The mounting member is fixed to a surface of the connecting plate body facing the first connecting plate. An embedding hole is provided on the mounting member, and the power generation component is disposed in the embedding hole.

6. The knee bending electromagnetic friction self-powered wireless self-sensing device according to claim 1, characterized in that: The knee bending electromagnetic friction self-powered wireless self-sensing device also includes a power management module, which is electrically connected to the power generation component and the wireless sensing component. The power management module is used to stabilize the electric energy generated by the power generation component and transmit the stabilized electric energy to the wireless sensing component.

7. The knee bending electromagnetic friction self-powered wireless self-sensing device according to claim 6, characterized in that: The knee bending electromagnetic friction self-powered wireless self-sensing device also includes an energy storage component, which is electrically connected to the power management module and the wireless sensing component.

8. A knee bending electromagnetic friction self-powered wireless self-sensing system, characterized by: The knee bending electromagnetic friction self-powered wireless self-sensing system comprises a host computer and the knee bending electromagnetic friction self-powered wireless self-sensing device according to any one of claims 1 to 7; The host computer is wirelessly connected to the wireless sensor component.

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