Piezoelectric-crystal oscillator composite power generation device based on magnetic force driving

Abstract

The invention discloses a piezoelectric-crystal oscillator composite power generation device based on magnetic force driving, which is characterized in that two layers of piezoelectric plates and crystal oscillator plates in the middle are extruded by a pair of attracted permanent magnets, and the piezoelectric effect and the inverse piezoelectric effect of a crystal oscillator are used for cooperatively generating power. Magnetic drive provides stable mechanical stress, and the composite structure improves energy conversion efficiency and is suitable for self-powered scenes of small equipment.

Description

Technical Field

[0001] The present invention relates to the field of new energy technology, and in particular to a device that utilizes the kinetic energy of magnet attraction to drive piezoelectric materials and crystal oscillators to generate electricity in coordination. Background Art

[0002] Currently, piezoelectric power generation technology generates electricity by driving piezoelectric materials through mechanical vibration. However, traditional single piezoelectric structures have low energy conversion efficiency and rely on external random vibrations (such as environmental vibration and human movement). Although crystal oscillators can stably output high-frequency signals, their primary use is frequency control and they are not used in power generation scenarios.

[0003] Defects of existing technology: Single piezoelectric power generation energy is not fully captured, and the crystal oscillator function has not been extended to the field of energy conversion. Summary of the Invention

[0004] Purpose of the invention: To provide an efficient device that generates continuous mechanical stress through magnet attraction to drive two layers of piezoelectric material and a crystal oscillator to generate electricity in coordination.

[0005] Technical solution: 1. Device structure: - It includes a pair of permanent magnets arranged facing each other (N pole and S pole facing each other), with a first piezoelectric sheet, a crystal oscillator sheet, and a second piezoelectric sheet stacked in sequence between them.

[0006] - The permanent magnets are fixed to the housing through an elastic support structure (such as a spring), and initially maintain a small distance (such as 0.5-2mm) to form an attractive tendency.

[0007] 2. Working Principle: - The permanent magnets are attracted to each other and squeeze the piezoelectric and crystal plates in the middle: - Piezoelectric power generation: Two layers of piezoelectric sheets (direct piezoelectric effect) generate electric charges under stress, which are collected and output as electrical energy through electrodes.

[0008] - Crystal oscillator power generation: The crystal oscillator is stimulated by mechanical stress to vibrate at high frequencies (using its inverse piezoelectric effect), and the vibration energy is converted into alternating current through an oscillation circuit.

[0009] - The elastic structure enables the reciprocating motion of the permanent magnet, resulting in continuous energy capture. Beneficial effects

[0010] - Magnetic drive provides stable mechanical stress and improves energy conversion efficiency; - Piezoelectric and crystal oscillator composite power generation to achieve broadband energy capture (low-frequency magnetic drive + high-frequency crystal oscillation); - Compact structure, suitable for self-powered scenarios of small electronic devices (such as sensors and IoT nodes). BRIEF DESCRIPTION OF THE DRAWINGS

[0011] - Figure 1 :Overall structural section of the device Figure 1 . Upper permanent magnet, 2. Lower permanent magnet, 3. First piezoelectric plate, 4. Second piezoelectric plate, 5. Crystal oscillator, 6. Upper elastic material, 7. Lower elastic material, 8. Insulating shell; - Figure 2 : Schematic diagram of external rectifier circuit connection. DETAILED DESCRIPTION

[0012] 1. Material selection: - Permanent magnet: NdFeB magnet (strong magnetism); - Piezoelectric sheet: PZT piezoelectric ceramic (high electromechanical coupling coefficient); - Crystal oscillator: AT-cut quartz crystal oscillator (high frequency stability).

[0013] 2. Assembly process: - Permanent magnets 1 and 2 are fixed to both sides of an insulating shell 8 through elastic materials 6 and 7. The first piezoelectric plate (the upper surface electrode is connected to the positive pole) 3, the crystal oscillator plate 5, and the second piezoelectric plate (the lower surface electrode is connected to the negative pole) 4 are placed in the middle in sequence. The electrodes are connected to an external rectifier circuit through wires.

[0014] 3. Energy Management: - The piezoelectric chip outputs direct current and is directly stored in the supercapacitor; - The crystal oscillator converts the high-frequency signal into alternating current through the LC oscillation circuit, which is then rectified and fed into the supercapacitor.

Claims

1. A piezoelectric-crystal oscillator composite power generation device based on magnetic drive, characterized in that: include: - A pair of permanent magnets facing each other, fixed by an elastic support structure, and initially maintaining a spacing that allows relative movement; - a composite power generation layer provided between the permanent magnets, comprising a first piezoelectric sheet, a crystal oscillator sheet, and a second piezoelectric sheet stacked in sequence; - The attraction movement of the permanent magnets drives the composite power generation layer to generate mechanical stress. The first and second piezoelectric sheets generate electricity through the direct piezoelectric effect, and the crystal oscillator sheet generates electricity through high-frequency vibrations stimulated by the inverse piezoelectric effect.

2. The device according to claim 1, characterized in that The elastic support structure is made of elastic material, and the spacing between the permanent magnets is 0.5-2 mm.

3. The device according to claim 1, characterized in that The polarization directions of the first piezoelectric sheet and the second piezoelectric sheet are opposite, and the electrodes are respectively connected to an external rectifier circuit.

4. The device according to claim 1, characterized in that The crystal oscillator converts vibration energy into alternating current through an LC oscillation circuit.

5. The device according to claim 1, characterized in that It also includes an energy storage module (supercapacitor) for storing the electrical energy output by the piezoelectric sheet and the crystal oscillator sheet.

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