CN109889093B - Electric energy conversion device - Google Patents
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Abstract
The invention provides an electric energy conversion device, which is used for converting wind energy or raindrop energy into electric energy to supply power to a load through a piezoelectric sensing module, a charger module is used for storing redundant electric energy into a storage battery module to realize the conversion of the wind energy or raindrop energy and the electric energy, in the piezoelectric sensing module, when a second piezoelectric crystal plate or a third piezoelectric crystal plate is pressed, a gear transmission assembly is started to control a piezoelectric crystal assembly to swing leftwards or rightwards, when one side of a double-sided piezoelectric crystal plate opposite to or opposite to the first piezoelectric crystal plate is pressed, a hydraulic cylinder is started to control the piezoelectric crystal assembly to rotate around a rotating shaft, and the position and the angle of the piezoelectric crystal assembly are controlled to adjust, so that the utilization rate of the wind energy or the raindrop energy is increased.
Description
Technical Field
The invention relates to the field of electric energy conversion, in particular to an electric energy conversion device.
Background
When some dielectrics are deformed by an external force in a certain direction, polarization occurs in the dielectrics, and opposite charges of positive and negative polarities occur on two opposite surfaces of the dielectrics. When the external force is removed, it returns to its uncharged state, a phenomenon known as positive voltageAnd (4) effect. The wind speed in coastal zone is often between 5-8 grades and sometimes higher, and the wind pressure is 40-270Pa and the force which can be measured by the pressure sensor can reach 10 when the natural wind is 5-8 grades according to the formula4KN. The pressure sensor utilizes a diaphragm type elastic element, the pressure bearing area of the diaphragm can convert wind pressure into force, a boss is arranged in the middle of the diaphragm, a piezoelectric plate is arranged on the back of the boss, the force acts on the piezoelectric plate through the boss to enable the piezoelectric plate to generate corresponding electric charge, and a charge amplifier is connected behind the piezoelectric plate. The running speed of the automobile or natural wind is a sudden variable, so that the charge leakage is less, namely wind energy or rain energy is converted into electric energy.
Disclosure of Invention
The invention aims to provide an electric energy conversion device which can convert potential energy of wind energy and rain into electric energy and has high utilization rate of the wind energy or the rain energy.
In order to achieve the above object, the present invention provides an electric energy conversion device, which includes a piezoelectric sensing module, a charger module, a storage battery module and a load, wherein the piezoelectric sensing module is configured to convert wind energy or raindrop energy into electric energy to supply power to the load, and the charger module is configured to store redundant electric energy into the storage battery module;
the piezoelectric sensing module comprises a support, a gear transmission assembly, a hydraulic cylinder and a piezoelectric crystal assembly, wherein the support is arranged on the gear transmission assembly, the piezoelectric crystal assembly comprises a first piezoelectric crystal plate, a second piezoelectric crystal plate, a third piezoelectric crystal plate and a double-sided piezoelectric crystal plate, the first piezoelectric crystal plate and the double-sided piezoelectric crystal plate are sleeved on a rotating shaft and are always vertically arranged, the rotating shaft is rotatably arranged on the support, the second piezoelectric crystal plate and the third piezoelectric crystal plate are arranged on two sides of the first piezoelectric crystal plate, and a piston of the hydraulic cylinder is connected with the double-sided piezoelectric crystal plate;
when the second piezoelectric crystal plate or the third piezoelectric crystal plate is pressed, the gear transmission assembly is started to control the piezoelectric crystal assembly to swing leftwards or rightwards, and when one side of the double-sided piezoelectric crystal plate, which is opposite to the first piezoelectric crystal plate, or the side of the double-sided piezoelectric crystal plate, which is opposite to the first piezoelectric crystal plate, is pressed, the hydraulic cylinder is started to control the piezoelectric crystal assembly to rotate around the rotating shaft.
Optionally, the gear transmission assembly includes a motor, a first gear and a second gear, the motor is connected with the first gear to drive the first gear to rotate, the first gear is engaged with the second gear, the support is disposed on the second gear, and when the first gear drives the second gear to rotate, the support drives the piezoelectric crystal assembly to swing leftwards or rightwards.
Optionally, when the second piezoelectric crystal plate or the third piezoelectric crystal plate is pressed, the motor is turned on, and a rotation direction of the motor when the second piezoelectric crystal plate is pressed is opposite to a rotation direction of the motor when the third piezoelectric crystal plate is pressed; and when the second piezoelectric crystal plate and the third piezoelectric crystal plate are not pressed, the motor is closed.
Optionally, when the opposite side of the double-sided piezoelectric crystal plate and the first piezoelectric crystal plate is pressed, the piston of the hydraulic cylinder extends to enable the piezoelectric crystal assembly to rotate around the rotating shaft counterclockwise, and when the opposite side of the double-sided piezoelectric crystal plate and the first piezoelectric crystal plate is pressed, the piston of the hydraulic cylinder retracts to enable the piezoelectric crystal assembly to rotate around the rotating shaft clockwise.
Optionally, the output voltage of the first piezoelectric crystal plate is:
wherein, CaIs the capacitance, k, of the first piezoelectric crystal plateaIs a constant associated with the piezoelectric crystals of said first piezoelectric crystal plate, Aaθ is the angle of inclination between the line of action of the force exerted on the first piezoelectric crystal plate and the first piezoelectric crystal plate, W0Wind pressure or rain pressure.
Optionally, the output voltages of the opposite side or the opposite side of the double-sided piezoelectric crystal plate and the first piezoelectric crystal plate are respectively:
wherein, CbCapacitance, C, of the piezoelectric crystal on the side of the double-sided piezoelectric crystal plate opposite to the first piezoelectric crystal platecCapacitance k of the piezoelectric crystal on the side of the double-sided piezoelectric crystal plate opposite to the first piezoelectric crystal platebIs a constant, k, associated with the piezoelectric crystal on the side of the double-sided piezoelectric crystal plate opposite the first piezoelectric crystal platecIs a constant associated with the piezoelectric crystals on the side of the double-sided piezoelectric crystal plate opposite the first piezoelectric crystal plate, AbAs the area of the slice of piezoelectric crystal where the force acts on the side of the double-sided piezoelectric crystal plate opposite to the first piezoelectric crystal plate, AcThe area of the slice of the piezoelectric crystal acting on the side of the double-sided piezoelectric crystal plate opposite to the first piezoelectric crystal plate is the force.
Optionally, the electric energy conversion device is arranged on an automobile.
In the electric energy conversion device provided by the invention, the piezoelectric sensing module is used for converting wind energy or raindrop energy into electric energy to supply power to the load, the charger module is used for storing redundant electric energy into the storage battery module to realize conversion between the wind energy or raindrop energy and the electric energy, in the piezoelectric sensing module, when the second piezoelectric crystal plate or the third piezoelectric crystal plate is pressed, the gear transmission assembly is started to control the piezoelectric crystal assembly to swing leftwards or rightwards, when one side of the double-sided piezoelectric crystal plate opposite to or opposite to the first piezoelectric crystal plate is pressed, the hydraulic cylinder is started to control the piezoelectric crystal assembly to rotate around the rotating shaft, and the position and the angle of the piezoelectric crystal assembly are controlled to adjust, so that the utilization rate of the wind energy or the raindrop energy is increased.
Drawings
Fig. 1 is a schematic structural diagram of an electrical energy conversion device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a piezoelectric sensing module according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a double-sided piezoelectric crystal plate according to an embodiment of the present invention when a force is applied to a piezoelectric crystal on the front side of the double-sided piezoelectric crystal plate;
FIG. 4 is a schematic diagram of the piezoelectric crystal assembly of FIG. 3 after being rotated counterclockwise according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a double-sided piezoelectric crystal plate according to an embodiment of the present invention when a force is applied to the piezoelectric crystal on the opposite side of the double-sided piezoelectric crystal plate;
FIG. 6 is a schematic diagram illustrating the structure of the piezoelectric crystal assembly of FIG. 5 after clockwise rotation according to an embodiment of the present invention;
wherein the reference numerals are:
1-a piezoelectric sensing module; 11-a scaffold; 12-a first gear; 13-a second gear; 14-a rotating shaft; 15-hydraulic cylinders; 16-a first piezoelectric crystal plate; 17-double-sided piezoelectric crystal plate; 18-a second piezoelectric crystal plate; 19-a third piezoelectric crystal plate; 2-a charger module; 3-a battery module;
Detailed Description
The following describes in more detail embodiments of the present invention with reference to the schematic drawings. Advantages and features of the present invention will become apparent from the following description and claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
As shown in fig. 1, the present embodiment provides an electric energy conversion device, which includes a piezoelectric sensing module 1, a charger module 2, a storage battery module 3, and a load, where the piezoelectric sensing module 1 is configured to convert wind energy or raindrop energy into electric energy to supply power to the load, and the charger module 2 is configured to store redundant electric energy into the storage battery module 3. Specifically, raindrops or wind energy is applied to the piezoelectric sensing module 1 to generate force, the force is converted into electric energy through the piezoelectric sensing module 1 to be output, when heavy rain falls and strong wind blows, the piezoelectric sensing module 1 generates electricity, electricity generated by the piezoelectric sensing module 1 supplies power to a load through a blocking diode, meanwhile, redundant electric energy is stored in the storage battery module 3 through the charger module 2, the blocking diode plays a role in one-way conduction in a circuit, and when the voltage emitted by the piezoelectric sensing module 1 is lower than the voltage of a direct current bus for power supply, the storage battery module 3 reversely transmits electricity to the piezoelectric sensing module 1. The charger module 2 realizes an optimized charging characteristic curve through a microcomputer control technology, the charging current automatically decreases along with the increase of the charging voltage of the storage battery module 3, and the charging effect is more ideal by combining a pulse charging mode at the last stage of charging. The capacity balance principle is adopted to intelligently judge the sufficiency of the storage battery module 3, the storage battery module 3 is guaranteed to be sufficient, namely not to be under-charged or over-charged, the charging has the dynamic tracking and adjusting function of charging parameters and the perfect protection function, and the voltage stabilizer keeps the output voltage stable by automatically adjusting the turn ratio of the coil. The load can be a direct current load or an alternating current load, and when the alternating current load exists, an inverter can be added in the circuit to convert direct current voltage into alternating current voltage for supplying power.
Further, as shown in fig. 2, the piezoelectric sensing module 1 includes a support 11, a gear transmission assembly, a hydraulic cylinder 15 and a piezoelectric crystal assembly, the gear transmission assembly includes a motor, a first gear 12 and a second gear 13, the motor is connected to the first gear 12 to drive the first gear 12 to rotate, the first gear 12 is engaged with the second gear 13, and the support 11 is disposed on the second gear 13.
The piezoelectric crystal component comprises a first piezoelectric crystal plate 16, a second piezoelectric crystal plate 18, a third piezoelectric crystal plate 19 and a double-sided piezoelectric crystal plate 17, wherein the first piezoelectric crystal plate 16 and the double-sided piezoelectric crystal plate 17 are all sleeved on a rotating shaft 14 and are always vertically arranged, the rotating shaft 14 is rotatably arranged on the support 11 (can rotate around the rotating shaft 14), the second piezoelectric crystal plate 18 and the third piezoelectric crystal plate 19 are symmetrically arranged on two sides of the first piezoelectric crystal plate 16, a piston of the hydraulic cylinder 15 is connected with the double-sided piezoelectric crystal plate 17, and the relative positions of the first piezoelectric crystal plate 16, the second piezoelectric crystal plate 18, the third piezoelectric crystal plate 19 and the double-sided piezoelectric crystal plate 17 are always unchanged.
The direction of force sensed by a piezoelectric crystal is not constant, so that the position and the angle of a piezoelectric crystal assembly are required to be adjusted to improve the efficiency of the piezoelectric crystal for converting wind energy and raindrop energy into electric energy. When the double-sided piezoelectric crystal plate 17 and the opposite side (front) of the first piezoelectric crystal plate 16 or the opposite side (back) of the first piezoelectric crystal plate are pressed, the hydraulic cylinder 15 is started, the rotating shaft 14 forces the double-sided piezoelectric crystal plate 17 to rotate through contraction and extension of the hydraulic cylinder 15, and when the rotating shaft 14 rotates, the first piezoelectric crystal plate 16, the second piezoelectric crystal plate 18 and the third piezoelectric crystal plate 19 which are always unchanged relative to the double-sided piezoelectric crystal plate 17 are driven to rotate.
When the second piezoelectric crystal plate 18 or the third piezoelectric crystal plate 19 is pressed, the motor is turned on, and when the second piezoelectric crystal plate 18 is pressed, the rotation direction of the motor is opposite to that of the motor when the third piezoelectric crystal plate 19 is pressed, and the support 11 drives the piezoelectric crystal assembly to swing leftwards or rightwards; when the second piezoelectric crystal plate 18 and the third piezoelectric crystal plate 19 are not pressed, the motor is turned off. When the front surface of the double-sided piezoelectric crystal plate 17 is pressed, the piston of the hydraulic cylinder 15 extends to make the piezoelectric crystal assembly rotate around the rotating shaft 14 anticlockwise, and when the back surface of the double-sided piezoelectric crystal plate 17 is pressed, the piston of the hydraulic cylinder 15 retracts to make the piezoelectric crystal assembly rotate around the rotating shaft 14 clockwise.
Specifically, the following description will be given by taking the example of converting wind energy into electric energy:
charge is generated by considering only the longitudinal piezoelectric effect, i.e. only forces perpendicular to the direction of slicing for the piezoelectric crystal. The relationship between the vertical direction of the piezoelectric crystal slice of the piezoelectric crystal plate and the force of wind applied to the piezoelectric crystal surface can be expressed by the following formula:
F＝W0A sinα；
wherein F is the component force of the piezoelectric crystal slice of the piezoelectric crystal plate in the direction vertical to the surface of the piezoelectric crystal, A is the area of the piezoelectric crystal slice acted on the piezoelectric crystal plate by wind, α is the inclination angle between the force action line of the wind to the piezoelectric crystal plate on the surface and the piezoelectric crystal plate, W0Is wind pressure, unit KN/m2。
For a known piezoelectric crystal plate, a relationship between the amount of charge q generated by a piezoelectric crystal slice and a component force F of the piezoelectric crystal slice of the piezoelectric crystal plate in a direction perpendicular to the piezoelectric crystal surface can be expressed by the following formula:
q＝kF；
wherein q is the charge quantity generated by the piezoelectric crystal slice of the piezoelectric crystal plate under the positive pressure; k is a constant associated with the piezoelectric crystals of the piezoelectric crystal plate;
the open circuit voltage u of the piezoelectric crystal plate0Satisfy the relation:
wherein C is the capacitance of the piezoelectric crystal plate.
When the piezoelectric crystal assembly is in an original state and has no wind, the output voltages of the first piezoelectric crystal plate 16, the second piezoelectric crystal plate 18, the third piezoelectric crystal plate 19 and the double-sided piezoelectric crystal plate 17 are all 0, and at this time, the hydraulic cylinder 15 does not work, and the motor does not rotate. When the wind from the no-wind state is changed to the wind from fig. 3, if the wind in fig. 3 has a component force outward along the vertical paper surface in fig. 3 to the first piezoelectric crystal plate 16, the third piezoelectric crystal plate 19 is pressed to generate a voltage, the motor is started to drive the first gear 12 to rotate clockwise, so as to drive the second gear 13 to rotate counterclockwise, until the component force outward along the vertical paper surface in fig. 3 is no longer present, the third piezoelectric crystal plate 19 is no longer pressed, the motor is turned off, and the first gear 12 stops rotating. If wind in fig. 3 has a component force to the first piezoelectric crystal plate 16 which is perpendicular to the paper surface of fig. 3, the second piezoelectric crystal plate 18 is pressed to generate voltage, the motor is started to drive the first gear 12 to rotate anticlockwise, so that the second gear 13 is driven to rotate clockwise, until no component force to the first piezoelectric crystal plate 16 which is perpendicular to the paper surface of fig. 3 exists, the second piezoelectric crystal plate 18 is not pressed, the motor is turned off, the first gear 12 stops rotating, and in this way, the wind can just apply no force to the left and right of the first piezoelectric crystal plate 16, and at this time, the first gear 12 does not rotate, so that the utilization rate of wind energy is improved.
Assuming that θ is the inclination angle between the force action line of the wind to the piezoelectric crystal plate and the piezoelectric crystal plate, when θ <90 °, as shown in fig. 3, the first piezoelectric crystal plate 16 is stressed, and the expression of the output voltage of the first piezoelectric crystal plate at this time is:
wherein, CaIs the capacitance, k, of the first piezoelectric crystal plateaIs a constant associated with the piezoelectric crystals of said first piezoelectric crystal plate, Aaθ is the angle of inclination between the line of action of the force exerted on the first piezoelectric crystal plate and the first piezoelectric crystal plate, W0Wind pressure or rain pressure.
At this time, the piezoelectric crystal on the front side of the double-sided piezoelectric crystal plate 17 is pressed, while the piezoelectric crystal on the back side of the double-sided piezoelectric crystal plate 17 is not pressed, and the expression of the output voltage of the piezoelectric crystal on the front side of the double-sided piezoelectric crystal plate 17 at this time is obtained according to the geometric relationship as follows:
wherein, CbCapacitance, k, of the piezoelectric crystals on the front side of the double-sided piezoelectric crystal platebA constant associated with the piezoelectric crystals of the front face of the double-sided piezoelectric crystal plate, AbIs the area of the slice of the piezoelectric crystal acting on the front surface of the double-sided piezoelectric crystal plate as a force.
Due to theta<90 DEG, so ubGreater than 0, u since the piezoelectric crystal on the reverse side of the double-sided piezoelectric crystal plate 17 is not pressedcAt 0, the cylinder 15 is extended to rotate the piezoelectric crystal assembly counterclockwise, and θ is increased. When θ increases to 90 °, that is, when θ becomes 90 °, as shown in fig. 4, the wind direction is parallel to the double-sided piezoelectric crystal plate 17, and therefore, the piezoelectric crystals on both the front and back sides of the double-sided piezoelectric crystal plate 17 are not pressed. Therefore, the output voltages of the piezoelectric crystals on the front and back sides of the double-sided piezoelectric crystal plate 17 are both 0, i.e. ub＝0，ucAt this time, the hydraulic cylinder 15 neither extends nor contracts.
When the direction of wind is suddenly changed from fig. 4 to fig. 5, that is, when θ >90 °, the piezoelectric crystal on the front side of the double-sided piezoelectric crystal plate 17 is not pressed, and the piezoelectric crystal on the back side of the double-sided piezoelectric crystal plate 17 is pressed, and the expression of the output voltage of the piezoelectric crystal on the back side of the double-sided piezoelectric crystal plate 17 at this time is obtained according to the geometric relationship as follows:
wherein, CcCapacitance, k, of the piezoelectric crystals on the reverse side of the double-sided piezoelectric crystal platecIs a constant associated with the piezoelectric crystals on the opposite side of the double-sided piezoelectric crystal plate, AcIs the area of the slice of the piezoelectric crystal that is acted on the reverse side of the double-sided piezoelectric crystal plate by force.
Due to theta>90 DEG, so ucGreater than 0, u because the front surface of the double-sided piezoelectric crystal plate is not pressedbAt 0, the hydraulic cylinder 15 is contracted to rotate the first piezoelectric crystal plate 16 clockwise, and θ is decreased. When θ is decreased to 90 °, that is, when θ is 90 °, the situation becomes as shown in fig. 6, and the hydraulic cylinder 15 does not contract and does not extend.
When the wind stops suddenly, the output voltages of the first piezoelectric crystal plate 16, the second piezoelectric crystal plate 18, the third piezoelectric crystal plate 19 and the double-sided piezoelectric crystal plate 17 are all 0, and at this time, the hydraulic cylinder 15 and the motor do not work. So that when wind exists, no matter how much the value of theta is, the first piezoelectric crystal plate 16 rotates to the direction which is exactly 90 degrees to the direction of wind,i.e. the output voltage of the last first piezoelectric crystal plate 16 is controlled by
Become into
Thereby improving the utilization rate of wind energy.
When u is finally as described abovea＝0，ub＝0，ucWhen the value is 0, the hydraulic cylinder 15 does not work, and the motor does not rotate; when u isa＞0，ud＞0，ueWhen 0, the first gear 12 rotates clockwise; when u isa＞0，ud＝0，ueIf the speed is more than 0, the first gear 12 rotates anticlockwise; when u isa＞0，ud＝0，ue0, the first gear 12 does not rotate; when u isa＞0，ub＞0，ucWhen the value is 0, the hydraulic cylinder 15 is extended; when u isa＞0，ub＝0，ucWhen the pressure is higher than 0, the hydraulic cylinder 15 contracts; when u isa＞0，ub＝0，ucThe hydraulic cylinder 15 neither extends nor contracts, which is 0.
Further, the electric energy conversion device may be provided on an automobile.
In summary, in the electric energy conversion apparatus provided in the embodiment of the present invention, the piezoelectric sensing module is configured to convert wind energy or raindrop energy into electric energy to supply power to the load, the charger module is configured to store redundant electric energy into the battery module, so as to realize conversion between the wind energy or raindrop energy and the electric energy, and in the piezoelectric sensing module, when the second piezoelectric crystal plate or the third piezoelectric crystal plate is pressed, the gear transmission assembly is activated to control the piezoelectric crystal assembly to swing left or right, when one side of the double-sided piezoelectric crystal plate opposite to or opposite to the first piezoelectric crystal plate is pressed, the hydraulic cylinder is activated to control the piezoelectric crystal assembly to rotate around the rotating shaft, and the position and angle of the piezoelectric crystal assembly are controlled to adjust, so as to increase the utilization rate of the wind energy or the raindrop energy.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. An electric energy conversion device is characterized by comprising a piezoelectric sensing module, a charger module, a storage battery module and a load, wherein the piezoelectric sensing module is used for converting wind energy or raindrop energy into electric energy to supply power to the load, and the charger module is used for storing redundant electric energy into the storage battery module;
the piezoelectric sensing module comprises a support, a gear transmission assembly, a hydraulic cylinder and a piezoelectric crystal assembly, wherein the support is arranged on the gear transmission assembly, the piezoelectric crystal assembly comprises a first piezoelectric crystal plate, a second piezoelectric crystal plate, a third piezoelectric crystal plate and a double-sided piezoelectric crystal plate, the first piezoelectric crystal plate and the double-sided piezoelectric crystal plate are sleeved on a rotating shaft and are always vertically arranged, the rotating shaft is rotatably arranged on the support, the second piezoelectric crystal plate and the third piezoelectric crystal plate are arranged on two sides of the first piezoelectric crystal plate, and a piston of the hydraulic cylinder is connected with the double-sided piezoelectric crystal plate;
when the second piezoelectric crystal plate or the third piezoelectric crystal plate is pressed, the gear transmission assembly is started to control the piezoelectric crystal assembly to swing leftwards or rightwards, and when one side of the double-sided piezoelectric crystal plate, which is opposite to the first piezoelectric crystal plate, or the side of the double-sided piezoelectric crystal plate, which is opposite to the first piezoelectric crystal plate, is pressed, the hydraulic cylinder is started to control the piezoelectric crystal assembly to rotate around the rotating shaft.
2. The power conversion device of claim 1, wherein the gear assembly comprises a motor, a first gear and a second gear, the motor is connected to the first gear to drive the first gear to rotate, the first gear is engaged with the second gear, the bracket is disposed on the second gear, and when the first gear drives the second gear to rotate, the bracket drives the piezoelectric crystal assembly to swing left or right.
3. The device of claim 2, wherein the motor is turned on when the second piezoelectric crystal plate or the third piezoelectric crystal plate is compressed, and the direction of rotation of the motor when the second piezoelectric crystal plate is compressed is opposite to the direction of rotation of the motor when the third piezoelectric crystal plate is compressed; and when the second piezoelectric crystal plate and the third piezoelectric crystal plate are not pressed, the motor is closed.
4. The power conversion device of claim 1, wherein the piston of the hydraulic cylinder extends to rotate the piezoelectric crystal assembly counterclockwise about the rotational axis when the side of the double-sided piezoelectric crystal plate opposite the first piezoelectric crystal plate is compressed, and wherein the piston of the hydraulic cylinder retracts to rotate the piezoelectric crystal assembly clockwise about the rotational axis when the side of the double-sided piezoelectric crystal plate opposite the first piezoelectric crystal plate is compressed.
5. The electrical energy conversion device of claim 1, wherein the output voltage of the first piezoelectric crystal plate is:
wherein, CaIs the capacitance, k, of the first piezoelectric crystal plateaIs a constant associated with the piezoelectric crystals of said first piezoelectric crystal plate, Aaθ is the angle of inclination between the line of action of the force exerted on the first piezoelectric crystal plate and the first piezoelectric crystal plate, W0Wind pressure or rain pressure.
6. The device of claim 5, wherein the output voltage of the opposite side or the opposite side of the double-sided piezoelectric crystal plate from the first piezoelectric crystal plate is:
wherein, CbCapacitance, C, of the piezoelectric crystal on the side of the double-sided piezoelectric crystal plate opposite to the first piezoelectric crystal platecCapacitance k of the piezoelectric crystal on the side of the double-sided piezoelectric crystal plate opposite to the first piezoelectric crystal platebIs a constant, k, associated with the piezoelectric crystal on the side of the double-sided piezoelectric crystal plate opposite the first piezoelectric crystal platecIs a constant associated with the piezoelectric crystals on the side of the double-sided piezoelectric crystal plate opposite the first piezoelectric crystal plate, AbAs the area of the slice of piezoelectric crystal where the force acts on the side of the double-sided piezoelectric crystal plate opposite to the first piezoelectric crystal plate, AcThe area of the slice of the piezoelectric crystal acting on the side of the double-sided piezoelectric crystal plate opposite to the first piezoelectric crystal plate is the force.
7. The electrical energy conversion device of any one of claims 1-6, wherein the electrical energy conversion device is disposed on an automobile.
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