Electromechanical coupling spiral generator

Abstract

The utility model provides an electromechanical coupling spiral generator, which comprises a plurality of spiral piezoelectric patches with the same structure, the plurality of spiral piezoelectric patches are overlapped to form a coaxial multi-spiral form, the plurality of spiral piezoelectric patches are close to each other and insulated from each other, the plurality of spiral piezoelectric patches respectively form an inductor, and the plurality of spiral piezoelectric patches are connected with the inductor. The multiple spiral piezoelectric plates are overlapped to form a capacitor, and the inductor and the capacitor form an LC oscillating circuit. The electromechanical coupling spiral generator provided by the utility model can enlarge the power generation area, prolong the power generation time, increase the amplitude of alternating current signals and improve the power generation efficiency. The electromechanical coupling spiral generator can be applied to an environment capable of providing continuous vibration, vibration energy is continuously absorbed, electric energy is generated, and electric energy conversion output is achieved.

Description

Technical Field

[0001] The utility model relates to a generator, and in particular provides an electromechanical coupling spiral generator. Background Art

[0002] Research on piezoelectric generators has been a constant focus for scientists and researchers. While piezoelectric devices have numerous forms and widespread applications, they also have some drawbacks. Typical piezoelectric generators have a small effective area, are thick, are difficult to deform, have short vibration durations, lack electromechanical coupling, and generate low power. Even under roadway vibrations and impacts, conventional piezoelectric generators require circuitry to improve power generation efficiency and amplitude.

[0003] Therefore, providing a generator with high power generation, high power generation efficiency and large amplitude has become an urgent problem to be solved. Utility Model Content

[0004] In view of this, the present invention provides an electromechanically coupled spiral generator to solve the problems of low power generation, low power generation efficiency and small amplitude of existing generators.

[0005] The utility model provides an electromechanically coupled spiral generator, comprising a plurality of spiral piezoelectric sheets with the same structure, wherein the plurality of spiral piezoelectric sheets overlap to form a coaxial multi-spiral form, the plurality of spiral piezoelectric sheets are close to each other and insulated from each other, the plurality of spiral piezoelectric sheets respectively constitute an inductor, and the plurality of spiral piezoelectric sheets overlap to form a capacitor, and the inductor and the capacitor form an LC oscillation circuit.

[0006] Preferably, the spiral piezoelectric sheets are all copper spiral piezoelectric sheets with a layer of ceramic power generation material covering the surface.

[0007] Further preferably, the natural frequency of the electromechanically coupled spiral generator coincides with the frequency range of the vibration source.

[0008] The electromechanically coupled spiral generator provided by this utility model generates electric charge when the spiral piezoelectric disc resonates under the influence of external vibration. It also couples capacitance and inductance to form an oscillating circuit. The structural features of the spiral piezoelectric disc can expand the power generation area, extend the power generation time, increase the AC signal amplitude, and improve power generation efficiency. The electromechanically coupled spiral generator provided by this utility model can be used in environments with continuous vibration, continuously absorbing vibration energy, generating electrical energy, and converting it into output. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a front view of the electromechanical coupled spiral generator provided by the present invention;

[0010] Figure 2 This is a top view of the electromechanical coupled spiral generator provided by the present invention;

[0011] Figure 3 It is a schematic diagram of the structure of a single spiral piezoelectric piece;

[0012] Figure 4 This is a circuit diagram of the electromechanical coupling spiral generator provided by the utility model;

[0013] Figure 5 This is a schematic diagram of the pulse vibration generated by the electromechanical coupling spiral generator provided by the present invention under the action of an impact load;

[0014] Figure 6 Diagram showing the process of parasitic waves caused by shock waves. DETAILED DESCRIPTION

[0015] The present invention will be further described below with reference to specific embodiments.

[0016] In order to solve the problems of low power generation, low power generation efficiency and small amplitude of existing generators, such as Figures 1 to 3 As shown, the present invention provides a spiral generator with a large area, long strain duration, easy resonance, and coupling of mechanical vibration with an oscillation circuit. The spiral generator includes: multiple spiral piezoelectric sheets 1 with the same structure, wherein the multiple spiral piezoelectric sheets 1 overlap to form a coaxial multi-spiral form, the multiple spiral piezoelectric sheets 1 are close to each other and insulated from each other, the multiple spiral piezoelectric sheets 1 respectively constitute an inductor L, and the multiple spiral piezoelectric sheets 1 overlap to form a capacitor C (two large-area metal sheets with a small spacing and insulation constitute a capacitor), and the inductor and capacitor form an LC oscillation circuit (the circuit principle diagram is shown in FIG). Figure 4 shown), where Figure 1 A schematic diagram of two spiral piezoelectric sheets is given.

[0017] Preferably, the spiral piezoelectric sheets 1 are all copper spiral piezoelectric sheets with a layer of ceramic power generation material on the surface. Further preferably, the natural frequency of the electromechanically coupled spiral generator coincides with the frequency range of the vibration source, so that the spiral piezoelectric sheet can easily resonate within the frequency range of the vibration source such as the wheel load.

[0018] This spiral generator increases the power generation area (S) by designing the piezoelectric plate into a spiral form. The spiral piezoelectric plate has a spiral spring structure. Vibration force causes the piezoelectric plate to generate strain and generate electricity. Under the action of impact load, the spiral piezoelectric plate generates parasitic waves. The parasitic waves reciprocate up and down along the spiral axis, extending the continuous vibration time of the spiral spring, which can increase the power generation working time (T) under a single impact force. When the natural frequency of the spiral generator coincides with the frequency range of the vibration source (such as a vehicle traveling on a road or bridge), causing resonance, the strain of the spiral generator increases under the resonance (F), which can increase the power generation capacity. The LC oscillation circuit can generate alternating current under the action of vehicle vibration and simultaneously further amplify the output signal amplitude, thereby improving power generation efficiency.

[0019] Among them, the natural frequency of the spiral piezoelectric sheet can be changed by adjusting the thickness, diameter, pitch, length and other structural parameters of the spiral piezoelectric sheet. By making the natural frequency of the spiral piezoelectric sheet coincide with the vibration frequency band of the vehicle, resonance is easily generated, thereby increasing the strain of the generator sheet.

[0020] The vibration frequency of the LC oscillation circuit can be changed by adjusting the single-piece area, number of spiral turns, and pitch of the spiral piezoelectric piece. By making the vibration frequency of the LC oscillation circuit and the mechanical vibration frequency fall within the same range, the amplitude of the AC signal can be amplified, thereby increasing the power generation capacity.

[0021] When the electromechanically coupled spiral generator is subjected to the impact load of the vibration source (vehicle), the spiral generator is instantly compressed and deformed. The pitch of the upper part of the spiral piezoelectric piece is reduced due to the force. During the elastic recovery process of the spring, the deformation of the spiral piezoelectric piece moves from the position with greater stiffness to the direction with weaker stiffness. That is, the compressed pitch segment first moves from top to bottom. When it moves to the bottom of the spiral, since the upper and lower ends of the spiral piezoelectric piece are fixed to the base, the end stiffness is the largest. Therefore, the compressed pitch segment (parasitic wave) reverses and returns upward at the bottom. This cycle repeats until the deformation energy is exhausted and gradually stops. As the parasitic wave reciprocates, the surfaces of the multiple spiral piezoelectric discs, each covered with a layer of ceramic power generation material, generate alternating current due to strain. Since the multiple spiral piezoelectric discs (inductors) are coaxial, close together, and insulated, the large, closely spaced, insulated metal sheets form capacitors. The combination of inductance and capacitance forms a typical LC oscillation circuit, amplifying the amplitude of the AC signal. This allows the generation of AC current and simultaneous amplification of the amplitude under the influence of vehicle vibration.

[0022] Figure 5 The schematic diagram of the pulse vibration generated by the electromechanical coupling spiral generator when hit by a hammer is given. The impact force of the hammer hitting the spiral generator (vibration source) is shown in Figure 5 .1; The spiral generator under the impact force is compressed and deformed. The pitch of the upper part of the spiral piezoelectric piece is reduced due to the force. Figure 5 .2; During the elastic force recovery process of the spring, the deformation of the spiral piezoelectric piece moves from the position with greater stiffness to the direction with weaker stiffness, that is, the compressed pitch segment moves from top to bottom first. Figure 5 .3, 5.4; When it moves to the bottom of the spiral, since the upper and lower ends of the spiral piezoelectric piece are fixed to the base and the stiffness is the largest, the compressed pitch segment (parasitic wave) will be reflected in the opposite direction at the bottom. Figure 5 .5, 5.6. This reciprocating cycle continues until the deformation energy is exhausted and then gradually stops. Under the action of the shock wave generated by the hammer vibration and the parasitic wave caused by it, the reciprocating motion of the spiral generator lasts much longer than the vibration impact generated by the instantaneous blow of the hammer. Therefore, extending the working time of the spiral generator is a factor in improving the power generation efficiency. The two spiral piezoelectric sheets covered with ceramic power generation materials reciprocate under the action of shock waves and parasitic waves, each generating an alternating current due to strain, and the two spiral piezoelectric sheets (inductors) are in a coaxial, close and insulated state to form a capacitor. The combination of inductance and capacitance forms a typical LC oscillation circuit, which amplifies the amplitude of the AC signal. In this way, AC can be generated under the action of a vibration source and the power can be amplified at the same time.

[0023] Figure 6 The process diagram of parasitic wave caused by shock wave is given, as shown in Figure 6 As shown in Figure 6.1, the amplitude and period of the generator without vibration source in the natural state are equal; the upper part of the spiral generator subjected to vibration impact is compressed and deformed after being subjected to force. It can be seen that after being subjected to force, the period of the amplitude generated by the upper part becomes smaller, that is, the frequency becomes faster, the number of reciprocating times is more, and the process is shorter, as shown in Figure 6.2. Figure 6 .2; After the force is applied, the deformation of the spiral generator moves from the position with greater stiffness to the direction with weaker stiffness, and the amplitude also changes. The spiral generator at the position with greater stiffness gradually returns to its original state, and the amplitude also returns to its original state. When the force gradually moves to the direction with weaker stiffness, the short-period amplitude also moves from top to bottom under the action of parasitic waves. Figure 6 .3, 6.4; When the force moves to the bottom of the spiral, since the upper and lower ends of the spiral are fixed to the base, the stiffness is the largest. Therefore, the pitch of the compressed section is reversed from the bottom under the action of the parasitic wave, and the short-period amplitude gradually moves upward, as shown in Fig. Figure 6 .5.

[0024] The above description of the disclosed embodiments is intended to enable those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0025] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present application is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An electromechanical coupled spiral generator, characterized in that: include: Multiple spiral piezoelectric sheets (1) with the same structure, wherein the multiple spiral piezoelectric sheets (1) overlap to form a coaxial multi-spiral form, the multiple spiral piezoelectric sheets (1) are close to each other and insulated from each other, the multiple spiral piezoelectric sheets (1) respectively constitute inductors, and the multiple spiral piezoelectric sheets (1) overlap to form capacitors, and the inductors and capacitors constitute an LC oscillation circuit.

2. The electromechanically coupled spiral generator according to claim 1, characterized in that: The spiral piezoelectric sheets (1) are all copper spiral piezoelectric sheets with a layer of ceramic power generation material covering the surface.

3. The electromechanically coupled spiral generator according to claim 1, characterized in that: The natural frequency of the electromechanically coupled spiral generator coincides with the frequency range of the vibration source.

Images