KR20070104691A - Electric power-generating system converting and charging kinetic-energy of pedestrian to electric-energy - Google Patents

Abstract

An electric power generating system of converting kinetic energy of a pedestrian to electric energy and charging is provided to improve energy conversion efficiency and environment-friendliness by not generating pollutants when converting energy. An electric power generating system(100) of converting kinetic energy of a pedestrian(400) to electric energy and charging includes a plurality of small-sized generating devices, and a charging portion(500). The plurality of small-sized generating devices are buried under the ground in the area where many pedestrians pass. The current generated from the generating devices is transmitted to the charging portion. The generating device consists of a piezoelectric device(300) which generates pressing force caused by the repeated pressing of the pedestrians, and square wave voltage which is generated during a pressing releasing process. A rectifying portion(600) which rectifies the square wave voltage to DC voltage is provided between the piezoelectric device and the charging portion.

Description

Electric Power-generating System Converting and Charging Kinetic-energy of Pedestrian to Electric-energy}

1 is a schematic diagram of applying a power generation system according to an embodiment of the present invention to a subway floor;

FIG. 2 is a circuit diagram of a process of rectifying a voltage of a square wave in the power generation system of FIG. 1.

The present invention relates to a power generation system for converting and charging kinetic energy of pedestrians into electrical energy. More specifically, a plurality of small power plants are buried in the area of the pedestrian traffic and the floor of the compartment. A system in which currents generated from devices are transmitted to a live part, wherein the power generator comprises a piezoelectric device that generates a square wave voltage in a pressing force caused by repeated pressurization by pedestrians and a pressure release process. to provide.

One of the indispensable things for human convenience in modern civilization is electrical energy. Such electric energy is typically classified into hydroelectric and wind power generation using energy generated in nature, thermal power generation using energy generated by burning fuels such as fossils and petroleum, and nuclear power generation using energy generated by nuclear fission. . However, hydropower and wind power have the disadvantage of being limited in the places where they can be applied according to specific natural conditions. Thermal power has the disadvantage of causing resource depletion and serious environmental problems. It has the disadvantage of safety and costly construction and disposal of waste.

Recently, as the interest on resource depletion and environmental issues is increasing, there is a high need for technology development for alternative energy that can compensate for the above disadvantages. As a part of this, interest in solar cells using solar energy is increasing, but the initial facility cost is high, and the growth of the technology for integrating solar light is insufficient, and thus it has not reached the practical stage of use as a main power source.

In addition, technologies for completely new power generation methods, such as recycling electrical energy already used to produce electrical energy, have been introduced. For example, Korean Patent Application Laid-Open Publication No. 2004-027580 discloses a technique for installing a power generator at a lower end of a speed bump that can vertically reciprocate, and generating electricity using kinetic energy of the speed bump. The above technology has the advantage of utilizing the energy consumed by recycling the kinetic energy of the vehicle, but has the disadvantage of costly installation and limited application.

Therefore, there is a high need for power generation technology that can utilize energy consumed with high conversion efficiency without causing resource depletion and environmental problems.

The present invention aims to solve the problems of the prior art as described above and the technical problems that have been requested from the past.

The present inventors embed a plurality of piezoelectric elements that generate a square wave voltage by pressurization of pedestrians in a region or a floor of a section where pedestrians pass, and configure a power generation system by charging current generated from the power plants. In addition, it is economical because there is no additional cost according to the supply of energy resources, it is eco-friendly because it does not generate pollutants during energy conversion, and it is confirmed that the advantages of excellent energy conversion efficiency have been achieved.

Specifically, it is an object of the present invention to provide a power generation system for converting and charging kinetic energy of pedestrians into electrical energy.

The power generation system according to the present invention for achieving this purpose is a system in which a number of small power plants are buried in the area of the pedestrian traffic or the bottom of the compartment, and the current generated from the power plants is transmitted to the live parts. The generator is characterized in that it consists of a piezoelectric element that generates a square wave voltage in the pressing force and pressure relief process caused by repeated pressurization by the pedestrians.

Therefore, the power generation system according to the present invention can reduce the cost of the supply of energy resources by using the kinetic energy of the pedestrian, can solve the problems of energy depletion and environmental problems, as well as the use of energy It is very economical because it is recycled.

In one preferred example, the rectifier for rectifying the square wave voltage may be further included between the generator and the charging unit. The power plant, which is pressurized by pedestrians, generates a relatively small amount of electrical energy since it has a very high voltage while instantaneously having a very high voltage in the course of being pressed and released. Therefore, in the present invention, the voltage generated by the power generator is rectified, so that conversion is performed to direct current capable of charging.

In the above example, it is preferable that the rectifier further includes a delay circuit so as to ensure a sufficient amount of current for the generators to be simultaneously pressurized so that current can be transmitted discontinuously and charging can be performed. That is, since the current is continuously transmitted to the charging unit by the delay circuit, charging can be easily performed. In addition, the rectifying unit may be a structure connected to a plurality of power plants as one, or may be a structure connected to each power generator as a plurality.

In the power generation system according to the present invention, the power generators may be buried without particular limitation as long as the area or section of the pedestrian traffic is many, and the buried place of the power generator, for example, a subway in which pedestrians are concentrated at rush hour On the premises or inside the subway.

The power generators are piezoelectric elements that exhibit voltage due to polarization caused by an external physical force, and the kind thereof is not particularly limited. It may be a piezoelectric element consisting of or more.

The piezoelectric element may have a high strain in the pressing direction and may exhibit a high electromotive force as the area of the pressing unit is small, and thus may have an elongated form in a thickness direction or a multilayered structure so as to exhibit such a form. In the case where the multi-layered structure is one unit, a plurality of piezoelectric element layers may be connected in parallel to each other within one unit.

The piezoelectric element is preferably buried in the bottom portion with its part exposed so that the applied pressure can be absorbed efficiently. In some cases, the piezoelectric element may be damaged by sharp materials such as heeled shoes of pedestrians, and thus, a plate member may be interposed on the upper portion of the piezoelectric element, which is excellent in durability and easily transmits pressure. In this case, the plate-shaped member may form part of the bottom portion as a specific letter or symbol.

As described above, the piezoelectric element layers are connected in parallel to each other in one unit, and the piezoelectric elements as one unit may be connected in series and / or in parallel to each other. For example, when the piezoelectric elements have a matrix structure of m n along a bottom part, one charging part is provided in each row so that the charging part may form an n + 1th column. Therefore, the piezoelectric elements arranged in the row may be connected in parallel to each other to transmit current to the charging units of the n + 1th column, and by such a structure, the charging units may also be connected in parallel to integrate electrical energy. .

In the present invention, the charging unit is a secondary battery capable of charging and discharging, may be charged by the piezoelectric element, a structure directly connected to a separate device, or a structure that is connected regularly to draw the charged power. . These secondary batteries may be connected in series and / or in parallel to be preferably applied as a power source of a large device.

Hereinafter, although described with reference to the drawings according to an embodiment of the present invention, this is for easier understanding of the present invention, the scope of the present invention is not limited thereto.

Figure 1 is a schematic diagram showing the power generation system according to an embodiment of the present invention applied to the subway floor.

Referring to FIG. 1, in the power generation system 100, current generated by a plurality of piezoelectric elements 300 embedded in the bottom portion 200 is pressed by the pedestrians 400 is transmitted to the charging unit 500. In addition, the kinetic energy of the pedestrian 400 may be converted into electrical energy and charged.

The piezoelectric element 300 generates a square wave voltage by repeated pressurization and pressure releasing processes of the pedestrians 400, and the square wave voltage is rectified by the rectifying unit 600 and transmitted to the charging unit 500. This structure can be easily confirmed in the circuit diagram of FIG.

Referring to FIG. 2, the square wave voltage generated by the safety device 300 is rectified primarily by the bridge diode 610, a resistor 620 for increasing the amount of current and adjusting the voltage, and a capacitor 630 for storing the current. It is transmitted to the secondary battery 500 as a charging unit through a delay circuit consisting of.

Referring back to FIG. 1, since the plurality of piezoelectric elements 300 arranged in a line are embedded in the bottom portion 200 with the top surfaces exposed, the pressing force by the pedestrian 400 may be effectively transmitted. . In addition, in the power generation system 100, a plurality of piezoelectric elements 300 may be connected in a parallel structure to amplify a minute current generated in each piezoelectric element 300.

Although described above with reference to the drawings according to an embodiment of the present invention, those of ordinary skill in the art will be able to perform various applications and modifications within the scope of the present invention based on the above contents.

As described above, the power generation system according to the present invention is economical because there is no additional cost according to the supply of energy resources, it is environmentally friendly because no pollutants are generated during energy conversion, and has an effect of excellent energy conversion efficiency. .

Claims (6)

It is a system in which a number of small power plants are buried in the area where the pedestrians pass, or the floor of the compartment, and the current generated from the power generators is transmitted to the charging unit, which is caused by repeated pressurization by the pedestrians. A power generation system comprising a piezoelectric element for generating a square wave voltage in a pressing force and a pressure releasing process. The power generation system according to claim 1, further comprising a rectifying unit for rectifying a square wave voltage into a DC voltage between the piezoelectric element and the charging unit. The power generation system of claim 2, wherein the rectifier further includes a delay circuit. The power generation system according to claim 1, wherein the area or section in which the power plants are embedded is a subway premises or a subway. The power generation system of claim 1, wherein the charging unit is a secondary battery capable of charging and discharging. 6. The power generation system of claim 5, wherein the power generation system includes two or more live parts connected in series and / or in parallel.

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