Stretchable energy collection device based on PZT linear array

Abstract

The invention provides a stretchable energy collection device based on a PZT linear array, and the device is connected with a plurality of groups of energy generation units through an elastic connecting band, and the energy generation units are linearly arranged on an elastic arm sleeve at equal intervals. The energy generating unit is provided with a base, supporting blocks are arranged on the two sides of the base, two pulley shafts and pulleys are installed between the supporting blocks, piezoelectric assemblies are installed at the tops of the supporting blocks, a transmission belt is connected to the bottoms of the piezoelectric assemblies, and the other end of the transmission belt bypasses the pulleys and then is connected with an elastic connecting belt. According to the device, through deformation of the elastic connecting belts and rotation of the pulleys, traction force borne by the elastic connecting belts at the two ends is converted into vertical pressure applied to the piezoelectric assemblies through the transmission belts, and therefore electric energy is generated; according to the device, the hard piezoelectric ceramic with high piezoelectric efficiency is applied to the flexible wearable equipment for energy supply, and the elastic connecting band has soft stretchability and bendability, so that when the device is worn at the joints of the human body, energy can be collected lightly or without feeling when the human body moves.

Description

Technical Field

[0001] The present invention relates to the technical field of piezoelectric energy collection, and in particular to a stretchable energy collection device based on a PZT linear array. Background Art

[0002] In recent years, with the development of Internet of Things technology, various wearable electronic devices for health monitoring are becoming more and more common in people's lives; however, the current charging method used by various wearable electronic devices is still mainly lithium battery power supply. There are many problems with lithium battery power supply, such as the need to frequently charge the battery; the life of lithium batteries is limited, and the battery needs to be replaced for long-term use, etc. It can be seen that the traditional battery power supply method has brought a lot of inconvenience to people's use of wearable electronic devices; therefore, people have gradually considered using self-generating equipment to power wearable electronic devices, and using self-generating technology to better solve the problem of energy supply for wearable electronic devices; in people's daily activities, the human body will generate a lot of unused energy, such as kinetic energy when walking, mechanical energy of joint bending, etc.; according to relevant investigations and studies, if the energy generated by these human activities is collected, the problem of powering low-power electronic devices can be effectively solved; and joint bending is the most frequent human activity. one of the actions; the existing methods for collecting energy through joint bending include triboelectricity, piezoelectricity, etc. Through research, it is found that piezoelectricity has a higher electromechanical coupling efficiency than triboelectricity. In piezoelectric energy collection, piezoelectric ceramics are a commonly used transducer device for piezoelectric energy collection due to their high energy conversion efficiency; in recent years, some researchers have proposed various mechanical structures based on piezoelectric ceramic materials for quantitative collection of human joint bending; but due to the inherent properties of piezoelectric ceramic materials themselves, they can hardly be bent and stretched, so the mechanical structures currently designed with piezoelectric ceramic materials are mostly rigid, and a ratchet structure is often required for joint bending energy collection. When this rigid device is worn at the joint, it will limit the free and flexible movement of the joint and cause discomfort to the human body; for this reason, the applicant has designed a stretchable energy harvesting device based on a PZT linear array according to the characteristics of piezoelectric ceramics, which can collect joint bending energy in a light or non-sensitive state. Summary of the invention

[0003] In order to solve the above technical problems, the present invention proposes a stretchable energy collection device based on a PZT linear array, wherein multiple groups of energy generating units are connected by arranging an elastic connecting belt, and the energy generating unit is provided with a base, a support block, a pulley shaft, a piezoelectric component, a pulley and a transmission belt. When the elastic connecting belt is deformed, the traction force at both ends is converted into a vertical pressure applied to the piezoelectric component through the transmission belt, thereby generating electrical energy, and hard piezoelectric ceramics with high piezoelectric efficiency are applied to flexible wearable devices for energy supply. The elastic connecting belt has soft stretchability and bendability, and when worn at the joints of the human body, it can collect energy lightly or imperceptibly when the human body moves.

[0004] To achieve the above object, the technical solution adopted by the present invention is: A stretchable energy collection device based on a PZT linear array comprises an elastic connecting belt, an energy generating unit and an elastic arm cuff, characterized in that: the stretchable energy collection device based on the PZT linear array is provided with an elastic connecting belt, the elastic connecting belt connects multiple groups of energy generating units, and the elastic connecting belt and the energy generating unit are connected and arranged linearly and equidistantly on the elastic arm cuff.

[0005] Furthermore, the stretchable energy collection device based on the PZT linear array is provided with an energy generating unit, and the energy generating unit structure is provided with a base, a support block, a piezoelectric component, a pulley shaft, a pulley, a transmission belt, a limit frame and a limit column; the energy generating unit is provided with a base, support blocks are provided at both ends of the base, two sets of pulley shafts are installed between the support blocks, pulleys are installed on the pulley shafts, and a limit frame is installed on the base outside the pulley installation position; the piezoelectric component is installed on the top of the support block, and a connecting transmission belt is installed on the bottom of the piezoelectric component, the transmission belt is connected to the elastic connecting belt after passing around the pulley and passing through the limit frame, and a limit column is provided on the side of the elastic connecting belt after the transmission belt passes through the limit frame.

[0006] Furthermore, the stretchable energy collection device based on the PZT linear array is provided with a piezoelectric component, and the piezoelectric component structure is a single-crystal composite layer, which includes, from the inside to the outside, a protective layer, a silver-plated electrode layer, a piezoelectric layer of a PZT-5H type piezoelectric material, and a base layer of a metal copper sheet. The two electrodes of the piezoelectric component are respectively led out from the electrode layer and the base layer through wires.

[0007] Furthermore, the stretchable energy collection device based on the PZT linear array is provided with a pulley shaft and a pulley, the pulley shaft is provided with two limit grooves near the center position, a spring clip is installed on the limit groove, and the pulley is fixed in the middle position of the pulley shaft by the spring clip, the pulley is provided with an arc-shaped wheel edge, and the edge of the wheel edge of the pulley is close to the fitting base.

[0008] Furthermore, the stretchable energy harvesting device based on the PZT linear array is provided with an elastic arm cuff, and the elastic arm cuff is woven from a skin-friendly material with good flexibility and elasticity.

[0009] Furthermore, the stretchable energy harvesting device based on the PZT linear array is provided with an elastic connecting belt, and the elastic connecting belt is made of silicone.

[0010] The benefits of this application are: 1. The stretchable energy harvesting device based on the PZT linear array uses an elastic arm sleeve to install the power generation device on it, which can effectively reduce the impact of the device on human joints when worn; 2. The stretchable energy harvesting device based on PZT linear array uses efficient piezoelectric ceramics, which has higher power generation efficiency; 3. The stretchable energy harvesting device based on the PZT linear array uses a silicone elastic connecting belt, which converts elastic energy into mechanical energy to make it gentler when collecting energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the local structure of the present invention; Figure 3 It is a schematic diagram of a front view of a local structure of the present invention; Figure 4 It is a schematic cross-sectional view of a local structure of the present invention; Figure 5 It is a schematic side view of a local structure of the present invention; Figure 6 It is a schematic diagram of wearing the present invention.

[0012] Marked in the figure are: 1. elastic connecting belt; 2. energy generating unit; 2-1. base; 2-2. support block; 2-3. piezoelectric component; 2-4. pulley shaft; 2-5. pulley; 2-6. transmission belt; 2-7. limit frame; 3. elastic arm sleeve. DETAILED DESCRIPTION

[0013] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: like Figure 1-6 As shown, a stretchable energy harvesting device based on a PZT linear array includes an elastic connecting belt 1, an energy generating unit 2 and an elastic arm sleeve 3, as shown in FIG. Figure 1 The stretchable energy collection device based on the PZT linear array shown in the figure is provided with an elastic connecting belt 1, and the elastic connecting belt 1 is made of silicone. The elastic connecting belt 1 is connected to multiple groups of energy generating units 2, and the energy generating units 2 are arranged in a linear regular pattern with equal intervals in between. The elastic connecting belt and the energy generating units are connected and installed on the elastic arm cuff 3, and then attached to the arm joint through the elastic arm cuff 3.

[0014] like Figure 2As shown, it is a structural diagram of the energy generating unit 2, the energy generating unit 2 is provided with a base 2-1, a support block 2-2, a piezoelectric component 2-3, a pulley shaft 2-4, a pulley 2-5, a transmission belt 2-6, a limit frame 2-7 and a limit column 2-8, the energy generating unit 2 is provided with a base 2-1, support blocks 2-2 are provided at both ends of the base 2-1, two sets of pulley shafts 2-4 are installed between the support blocks 2-2, the pulley 2-5 is installed on the pulley shaft 2-4, the pulley shaft 2-4 is provided with two limit grooves near the center, and a spring is installed on the limit groove Spring clip, the pulley 2-5 is fixed in the middle position of the pulley shaft 2-4 by the spring clip, the pulley 2-5 is provided with an arc-shaped wheel edge, the pulley 2-5 is provided with an arc-shaped wheel edge close to the base 2-1, and the pulley 2-5 is provided with a limited position frame 2-7 on the base 2-1 outside the installation position; the piezoelectric component 2-3 is installed on the top of the support block 2-2, and the connecting transmission belt 2-6 is installed at the bottom of the piezoelectric component 2-3. The transmission belt 2-6 is connected to the bottom of the piezoelectric component 2-3 with epoxy resin, and the transmission belt 2-6 passes around the pulley 2-5 and passes through the limit frame 2-7. The other end The transmission belt 2-6 is connected to the elastic connecting belt 1, and a limiting column 2-8 is arranged on one side of the elastic connecting belt 1 after passing through the limiting frame 2-7. The limiting frame 2-7 and the limiting column 2-8 can prevent the transmission belt 2-6 from detaching from the pulley 2-5 in a relaxed state; the structure of the piezoelectric component 2-3 is a single crystal composite layer, which is composed of a protective layer, a silver-plated electrode layer, a piezoelectric layer of a PZT-5H type piezoelectric material, and a base layer of a metal copper sheet from the inside to the outside; the two electrodes of the piezoelectric component are respectively led out from the electrode layer and the base layer through wires; the base 2-1 and the piezoelectric component 2 -3's plane size is set to 10mm*25mm, the support block 2-2's height is set to 8mm, the single energy generating unit 2's size is a rectangular parallelepiped of 10mm*25mm*8mm, the support block 2-2 is made of carbon fiber reinforced PLA material and is processed by 3D printing technology; the two sets of pulley systems consisting of the pulley shaft 2-4, the pulley 2-5 and the transmission belt 2-6 are in a mirror relationship in the width direction of the energy generating unit 2, and are symmetrically distributed on both sides of the energy generating unit 2, thereby ensuring the stability of the energy generating unit 2 during the stretching process.

[0015] like Figure 6As shown, the elastic connecting belt 1 and the energy generating unit 2 are connected and installed on the elastic arm sleeve 3. The elastic arm sleeve 2-6 is woven from a skin-friendly material with good flexibility and elasticity, and can collect energy in a light or non-sensitive state when the human joints move. The device converts the deformation of each elastic connecting belt 1 into pressure applied vertically to the piezoelectric component 2-3. Therefore, the elastic strength of the elastic connecting belt 1 is an important variable of the device. Considering the application in different scenarios, the elastic strength of the elastic connecting belt 1 can be controlled by changing the number of layers, width, thickness, etc. of the elastic connecting belt 1, and different elastic strengths can be set according to different groups of people to make people more comfortable to wear.

[0016] The above description is only a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any modification or equivalent change made based on the technical essence of the present invention still falls within the scope of protection required by the present invention.

Claims

1. A stretchable energy harvesting device based on a PZT linear array, comprising an elastic connecting belt (1), an energy generating unit (2) and an elastic arm sleeve (3), characterized in that: The stretchable energy collection device based on the PZT linear array is provided with an elastic connecting belt (1), the elastic connecting belt (1) connecting multiple groups of energy generating units (2), and the elastic connecting belt (1) and the energy generating units (2) are connected and arranged linearly and equidistantly and mounted on an elastic arm sleeve (3).

2. A stretchable energy harvesting device based on a PZT linear array according to claim 1, characterized in that: The stretchable energy harvesting device based on the PZT linear array is provided with an energy generating unit (2), wherein the energy generating unit (2) is provided with a structure comprising a base (2-1), a support block (2-2), a piezoelectric component (2-3), a pulley shaft (2-4), a pulley (2-5), a transmission belt (2-6), a limit frame (2-7) and a limit column (2-8); the energy generating unit (2) is provided with a base (2-1), support blocks (2-2) are provided at both ends of the base (2-1), two sets of pulley shafts (2-4) are installed between the support blocks (2-2), and the pulley A pulley (2-5) is mounted on the shaft (2-4); a limit frame (2-7) is mounted on the base (2-1) outside the mounting position of the pulley (2-5); a piezoelectric component (2-3) is mounted on the top of the support block (2-2); a connecting transmission belt (2-6) is mounted on the bottom of the piezoelectric component (2-3); the other end of the transmission belt (2-6) is connected to the elastic connection belt (1) after passing through the pulley (2-5) and passing through the limit frame (2-7); and a limit column (2-8) is arranged on one side of the transmission belt (2-6) close to the elastic connection belt (1) after passing through the limit frame (2-7).

3. The stretchable energy harvesting device based on a PZT linear array according to claim 1, characterized in that: The stretchable energy collection device based on the PZT linear array is provided with a piezoelectric component (2-3). The structure of the piezoelectric component (2-3) is a single crystal composite layer, which comprises, from the inside to the outside, a protective layer, a silver-plated electrode layer, a piezoelectric layer of a PZT-5H type piezoelectric material, and a base layer of a metal copper sheet. Two electrodes of the piezoelectric component (2-3) are respectively led out from the electrode layer and the base layer through wires.

4. The stretchable energy harvesting device based on a PZT linear array according to claim 1, characterized in that: The stretchable energy collection device based on the PZT linear array is provided with a pulley shaft (2-4) and a pulley (2-5); the pulley shaft (2-4) is provided with two limit grooves at a central position; a spring clip is installed on the limit groove; the pulley (2-5) is fixed at a middle position of the pulley shaft (2-4) by the spring clip; the pulley (2-5) is provided with an arc-shaped wheel edge; the edge of the wheel edge of the pulley (2-5) is close to the fitting base (2-1).

5. The stretchable energy harvesting device based on a PZT linear array according to claim 1, characterized in that: The stretchable energy harvesting device based on the PZT linear array is provided with an elastic arm sleeve (2-6), and the elastic arm sleeve (2-6) is woven from a skin-friendly material with good flexibility and elasticity.

6. The stretchable energy harvesting device based on a PZT linear array according to claim 1, characterized in that: The stretchable energy collection device based on the PZT linear array is provided with an elastic connecting belt (1), and the elastic connecting belt (1) is made of silicone.

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