CN201570994U - Power supply device for marine instruments and meters - Google Patents

Abstract

The utility model relates to a power supply device for marine instruments and meters. The generating efficiency of the prior piezoelectric generator is low. The power supply device comprises a sealed ball, metal cantilever beams, a mass block, rectification circuits and a super capacitor. The mass block is arranged at the center of the sealed ball. The six strip-shaped metal cantilever beams are three-dimensionally and axially arranged in the sealed ball, each axial direction is provided with two metal cantilever beams, which are positioned at both sides of the mass block, one end of each metal cantilever beam is fixed on the inner sidewall of the sealed ball, the other end of each metal cantilever beam is extended into a corresponding rectangular socket arranged on the mass block, and the metal cantilever beams are slidably matched with the rectangular socket. The upper and the lower surfaces of each metal cantilever beam are correspondingly provided with energy converters, the outputs of the energy converters are connected with the inputs of the rectification circuits, and the outputs of the rectification circuits are connected with the super capacitor. The utility model utilizes the ceaseless movement of waves to constantly supply electricity.

Description

A power supply device for offshore instruments

technical field

The utility model belongs to the technical field of energy and electronics, in particular to a power supply device for marine instruments and meters based on ocean wave energy capture.

Background technique

The ocean has played a huge role in the economic and social development of my country's eastern coastal areas. The ocean is the main carrier for the transportation of goods and commodities, and it is also the treasure house of the most abundant material resources on the earth. Marine resources have great potential for development. At present, my country has increased investment and development in the field of marine technology, but in the power supply system of marine equipment and instruments that require their own power supply, solar cells, lithium-ion batteries and fuel cells are currently being researched and applied. Solar cells can provide long-term power supply for offshore instruments and equipment placed outdoors, but they are also limited by weather conditions and application sites. Lithium-ion batteries and fuel cells have low energy density, limited battery life, need to be replaced, and are polluted. This requires us to adopt a new energy conversion device to power the offshore instrumentation device.

The wave energy of ocean waves is the most direct and useful energy source that can be used to power offshore instruments. Considering the use of wave energy of ocean waves for power generation has great application prospects. At present, the vibrating generators that use the vibration energy of the external environment to generate electricity can be divided into three types: electromagnetic, electrostatic and piezoelectric, according to the different energy conversion mechanisms. Among them, the vibrating piezoelectric generator has the advantages of simple structure, high energy density, and easy miniaturization, and is currently a hot spot in the research of vibrating micro generators. By applying an external force to generate charges on the surface of the piezoelectric body, a piezoelectric power generation device is constructed. According to the relationship between the polarization direction of the piezoelectric body and the direction of the stress, the piezoelectric power generation device is divided into two different modes, that is, the polarization direction of the piezoelectric body is the same as the direction of the applied external force (d33) and the polarity of the piezoelectric body The chemical direction and the force direction are perpendicular to each other (d31). Although the electromechanical coupling coefficient of the d31 mode is relatively small, the sheet-type piezoelectric vibrator can obtain a large strain when a small external force is applied, so it is suitable for occasions with low vibration frequency, external force and small size. However, piezoelectric materials are limited by their own material properties, and the power generation energy is low. Ferroelectric polymers have a very high dielectric constant at room temperature. By adjusting the composition of the mixture, the dielectric properties and energy density can be adjusted.

Contents of the invention

The purpose of the utility model is to provide a power supply device for marine instruments and meters aiming at the deficiencies of the prior art.

The utility model utilizes the random vibration generated by the wave energy of the sea waves to drive the ferroelectric polymer film on the upper and lower surfaces of the cantilever beam fixed on the wall of the sealed ball to generate strain, and induce the polarization reversal in the ferroelectric polymer film. produce an electric field.

A power supply device for offshore instruments and meters includes a sealing ball, a metal cantilever beam, a quality block, a rectification circuit and a supercapacitor. The sealing ball is a sealed spherical shell, and the mass block is arranged at the center of the sealing ball. There are six strip-shaped metal cantilever beams arranged in the sealing ball along the three-dimensional axis of the space. There are two metal cantilever beams on each axis and located on both sides of the mass block. One end of each metal cantilever beam is connected to the inner side of the sealing ball. The wall is fixedly connected, and the other end extends into the corresponding rectangular groove provided on the mass block. The thickness of the metal cantilever beam is smaller than the width of the rectangular groove, and the metal cantilever beam forms a sliding fit with the rectangular groove. The upper surface and the lower surface of each metal cantilever beam are correspondingly provided with energy conversion devices.

The energy conversion device includes a ferroelectric polymer film, an upper metal film and a lower metal film, the ferroelectric polymer film is located between the upper metal film and the lower metal film, the upper metal film is connected with an upper electrode lead wire, and the lower metal film The lower electrode lead-out line is connected, the upper electrode lead-out line is connected with one end of the input of the rectification circuit, and the lower electrode lead-out line is connected with the other end of the rectification circuit input. The positions of the lead wires of the upper electrode and the lead wires of the lower electrode can be exchanged, that is, the lead wires of the upper electrode and the lead wires of the lower electrode can be respectively connected to the two ends of the rectification circuit.

The rectification circuit is arranged in the sealing ball, and the rectification circuit includes a filter capacitor C1, a first rectification diode D1, a second rectification diode D2, a third rectification diode D3 and a fourth rectification diode D4. One end of the input of the rectification circuit is the connection end of the cathode of the first rectification diode D1 and the anode of the second rectification diode D2, and the other end of the input of the rectification circuit is the connection end of the anode of the third rectification diode D3 and the cathode of the fourth rectification diode D4; the first rectification diode D1 The anode and the anode of the fourth rectifier diode D4 are connected to one end of the filter capacitor C1, and the cathode of the second rectifier diode D2 and the cathode of the third rectifier diode D3 are connected to the other end of the filter capacitor C1. The positive end of the output of the rectification circuit is the connection end of the cathode of the second rectification diode D2 and the cathode of the third rectification diode D3, and the cathode end of the output of the rectification circuit is the connection end of the anode of the first rectification diode D1 and the anode of the fourth rectification diode D4;

Each energy conversion device corresponds to a rectification circuit, twelve energy conversion devices correspond to twelve rectification circuits, and the outputs of the twelve rectification circuits are connected in parallel to both ends of the supercapacitor C13;

The outputs of the twelve rectification circuits are connected in parallel to both ends of the supercapacitor C13. The positive pole of the supercapacitor C13 is connected to the positive terminals of the outputs of the twelve rectification circuits, and the negative pole is connected to the negative terminals of the outputs of the twelve rectification circuits.

The sealing ball is formed by splicing two hemispheres.

The utility model adopts the ferroelectric polymer thin film as an electromechanical converter to realize higher output voltage. Because the utility model utilizes the endless movement of waves (the deformation is larger when the wave movement is large), it can obtain continuous power supply; the utility model uses three cantilever beams in different directions inside, no matter which direction the closed ball moves, There will always be the largest deformation on the two beams, so that a larger current can be generated to the greatest extent while the power supply is stable.

Description of drawings

Fig. 1 is a schematic view of the longitudinal section of the utility model;

Fig. 2 is a schematic diagram of the cross-sectional structure of the utility model;

Fig. 3 is the schematic diagram of the rectification circuit in the utility model;

Fig. 4 is a schematic diagram of the connection between the rectifier circuit and the supercapacitor in the present invention.

Detailed ways

As shown in Fig. 1, Fig. 2 and Fig. 3, a power supply device for offshore instruments and meters includes a sealing ball 7, a metal cantilever beam 4, a mass block 5, a rectification circuit 8 and a supercapacitor. The sealing ball 7 is a sealed spherical shell, and the mass block 5 is arranged at the center of the sealing ball 7 . Six metal cantilever beams 4 in the shape of strips are arranged in the sealing ball 7 along the three-dimensional axial direction of the space. There are two metal cantilever beams 4 on each axial direction and are located on both sides of the mass block 5. Each metal cantilever beam 4 One end is fixedly connected to the inner wall of the sealing ball 7, and the other end extends into the corresponding rectangular groove 6 provided on the mass block 7. The thickness of the metal cantilever beam 4 is smaller than the width of the rectangular groove 6. The metal cantilever beam 4 and the rectangular groove 6 form a Slip fit. The upper surface and the lower surface of each metal cantilever beam 4 are correspondingly provided with energy conversion devices.

The energy conversion device includes a ferroelectric polymer film 2, an upper metal film 1 and a lower metal film 3, the ferroelectric polymer film 2 is located between the upper metal film 1 and the lower metal film 3, and the upper metal film 1 is connected with an upper electrode lead wire A1, the lower metal thin film 3 is connected with the lower electrode lead wire B1, the upper electrode lead wire A1 is connected with one input end of the rectifier circuit 8, and the lower electrode lead wire B1 is connected with the other input end of the rectifier circuit 8. The positions of the upper electrode lead wire A1 and the lower electrode lead wire B1 can be exchanged, that is, the upper electrode lead wire A1 and the lower electrode lead wire B1 can be respectively connected to two ends of the rectifier circuit. A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, and A12 shown in the figure are all used as the lead wires of the upper electrode corresponding to the energy conversion device, B2, B3, B4, B5, B6, B7, B8 , B9, B10, B11, and B12 are all used as the energy conversion device corresponding to the lower electrode lead-out line.

The rectifier circuit 8 is arranged in the sealed ball, and its structure is shown in Figure 3: it includes a filter capacitor C1, a first rectifier diode D1, a second rectifier diode D2, a third rectifier diode D3 and a fourth rectifier diode D4; one end of the rectifier circuit input It is the connecting terminal of the negative pole of the first rectifying diode D1 and the positive pole of the second rectifying diode D2, and the other end of the input of the rectifying circuit is the connecting terminal of the positive pole of the third rectifying diode D3 and the negative pole of the fourth rectifying diode D4; the positive pole of the first rectifying diode D1 and the fourth rectifying diode The anode of the diode D4 is connected to one end of the filter capacitor C1, the cathode of the second rectifier diode D2 and the cathode of the third rectifier diode D3 are connected to the other end of the filter capacitor C1; the positive end of the output of the rectifier circuit 8 is the cathode of the second rectifier diode D2 and the third The negative terminal of the rectifier diode D3, the negative terminal of the output of the rectifier circuit 8 is the positive terminal of the first rectifier diode D1 and the positive terminal of the fourth rectifier diode D4.

Each energy conversion device corresponds to a rectification circuit, twelve energy conversion devices correspond to twelve rectification circuits, and the outputs of the twelve rectification circuits are connected in parallel to both ends of the supercapacitor C13.

As shown in Figure 4, the outputs of the twelve rectification circuits are connected in parallel to both ends of the supercapacitor C13, the positive pole of the supercapacitor C13 is connected to the positive terminal of the output of the twelve rectification circuits, and the negative pole is connected to the negative terminal of the output of the twelve rectification circuits connect.

For the convenience of assembly, the sealing ball is spliced by two hemispheres, and conventional sealing measures can be used at the splicing.

The specific working process of the device is: as the seawater moves up and down, the mass block will be affected by the inertial force, causing the deformation of the metal cantilever beam, which will cause the change of strain and stress in the ferroelectric polymer film. The electric polarization effect of the ferroelectric polymer film will produce a changing potential difference. With the movement of the external wave, the surface of the ferroelectric polymer film will have an alternating current output with an indeterminate peak value. The output alternating current will be output to the super Capacitive storage, the output of supercapacitor storage supplies power to the load. When the environmental vibration frequency is equal to the natural frequency of the sealing ball, it will cause the resonance of the sealing ball, and the change of the stress and strain of the piezoelectric layer is the largest, so that the change of the output voltage of the device reaches the maximum.

Claims (1)

1. A power supply device for offshore instruments and meters, comprising a sealing ball, a metal cantilever beam, a mass block, a rectifier circuit and a supercapacitor, characterized in that: the sealing ball is a sealed spherical shell, and the mass block is arranged in the sealing ball at the center of the sphere; six strip-shaped metal cantilever beams are arranged along the three-dimensional axis of the space in the sealed ball, and there are two metal cantilever beams on each axis and are located on both sides of the mass block. One end is fixed to the inner wall of the sealing ball, and the other end extends into the corresponding rectangular groove on the mass block. The thickness of the metal cantilever beam is smaller than the width of the rectangular groove, and the metal cantilever beam forms a sliding fit with the rectangular groove; each metal cantilever The upper surface and the lower surface of the beam are correspondingly provided with energy conversion devices; The energy conversion device includes a ferroelectric polymer film, an upper metal film and a lower metal film, the ferroelectric polymer film is located between the upper metal film and the lower metal film, the upper metal film is connected with an upper electrode lead wire, and the lower metal film The lower electrode lead-out line is connected, the upper electrode lead-out line is connected to one end of the input of the rectification circuit, and the lower electrode lead-out line is connected to the other end of the rectification circuit input; The rectification circuit is arranged in a sealed ball, and the rectification circuit includes a filter capacitor C1, a first rectification diode D1, a second rectification diode D2, a third rectification diode D3 and a fourth rectification diode D4; one end of the input of the rectification circuit is the first The negative pole of the rectifying diode D1 is connected to the positive pole of the second rectifying diode D2, and the other end of the input of the rectifying circuit is the positive pole of the third rectifying diode D3 and the negative pole of the fourth rectifying diode D4; the positive pole of the first rectifying diode D1 is connected to the positive pole of the fourth rectifying diode D4 Connected to one end of the filter capacitor C1, the cathode of the second rectifier diode D2 and the cathode of the third rectifier diode D3 are connected to the other end of the filter capacitor C1; the positive terminal of the output of the rectifier circuit is the cathode of the second rectifier diode D2 and the cathode of the third rectifier diode D3 The connection terminal, the negative terminal of the output of the rectification circuit is the connection terminal of the anode of the first rectification diode D1 and the anode of the fourth rectification diode D4.

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