Treading type power generation lighting system

Abstract

The utility model belongs to the technical field of ecological lighting systems, and particularly discloses a treading type power generation lighting system. The problem that safety accidents are caused due to the fact that ecological lighting is lacked in staircases in a campus is solved. Comprising a pressure power generation unit, an energy conversion unit, an energy storage unit, a controller and a lamp strip which are sequentially connected, the pressure power generation unit is arranged on the upper surface of a step, and the energy conversion unit, the energy storage unit and the controller are all arranged on the side face of a stair; the lamp strips are arranged on the front edges of the steps, and the lamp strips of the adjacent steps are connected to form a triangle. The pressure power generation unit comprises an upper bearing plate, a lower bearing plate and a plurality of piezoelectric units arranged in a V shape. The piezoelectric unit is formed by stacking and connecting a plurality of piezoelectric ceramic pieces in parallel. The energy conversion unit adopts a three-voltage rectification filter circuit and an LM7805 regulator circuit. Potential energy is converted into electric energy, and energy regeneration, energy conservation and emission reduction are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of ecological lighting systems, and in particular relates to a pedal-type power generation lighting system. Background Art

[0002] In recent decades, piezoelectric power generation has been widely studied as a high-tech technology around the world. Piezoelectric devices generate electric charges under the action of external forces. These charges are collected and stored in capacitors or batteries to power subsequent electronic components and systems. The advantages of piezoelectric energy harvesting devices are small size, simple structure, no electromagnetic interference, easy processing and manufacturing, and the power density can reach 200μW / cm 3 In the past, piezoelectric materials were often used in sensors and actuators, and were rarely used as devices to provide electrical energy. However, with the improvement of the piezoelectric properties of piezoelectric materials and the use of highly integrated, low-energy power electronic devices, piezoelectric power generation technology has gradually been applied to people's real lives.

[0003] There is a large flow of people in the stairwells on campus, especially at night. When students walk on the stairs, if there is a lack of lighting, it is easy to step on empty space, causing safety accidents. If a conventional lighting system is added, it will not be conducive to achieving the national low-carbon and environmental protection goals. To this end, the applicant takes advantage of the large flow of people in the stairwells on campus and combines the advantages of piezoelectric technology to design a step-type power generation and lighting system for campus stairs that combines piezoelectric power generation technology and energy conversion technology. Utility Model Content

[0004] The purpose of the utility model is to provide a step-on type power generation lighting system, which effectively solves the problem of safety accidents caused by lack of ecological lighting in stairwells on campus.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is:

[0006] A step-by-step power generation lighting system comprises a pressure power generation unit, an energy conversion unit, an energy storage unit, a controller and a light strip which are connected in sequence. The pressure power generation unit is arranged on the upper surface of each step of the stairwell, the energy conversion unit, the energy storage unit and the controller are all arranged on the side of the stairs, and the light strip is arranged at the front edge of each step of the stairwell and the setting position points of the light strips of adjacent steps are connected to form a triangle.

[0007] The pressure power generation unit includes an upper pressure plate, a lower pressure plate, and a plurality of piezoelectric units arranged in a V shape and located between the upper pressure plate and the lower pressure plate.

[0008] The piezoelectric unit is formed by stacking and connecting a plurality of piezoelectric ceramic sheets in parallel. The metal end caps of the upper and lower adjacent piezoelectric ceramic sheets are short-circuited and placed in opposite polarization directions. The plurality of piezoelectric ceramic sheets are connected in parallel by wires.

[0009] The energy conversion unit adopts a three-voltage rectifier filter circuit to convert the unstable electric energy generated by the pressure power generation unit into stable electric energy that is easy to store, and adopts an LM7805 regulator circuit to regulate the voltage.

[0010] Furthermore, the energy storage unit includes a synchronous charge extraction circuit board and a lithium iron phosphate battery block.

[0011] Furthermore, a plurality of spring mechanical ejectors are provided between the upper pressure-bearing plate of the pressure power generation unit and the piezoelectric unit.

[0012] Furthermore, the piezoelectric ceramic sheet is a PZT-5H piezoelectric ceramic sheet.

[0013] Furthermore, a floor film is laid on the upper surface of the upper pressure plate.

[0014] Furthermore, the pressure power generation unit is connected to the step by sliding rails.

[0015] Compared with the prior art, the beneficial technical effects of the utility model are:

[0016] (1) The utility model converts the large amount of wasted potential energy in the stairwell into electrical energy by using piezoelectric ceramic sheets to generate electricity and lithium iron phosphate storage blocks to store electricity, thereby achieving energy regeneration and energy conservation and emission reduction. In addition, the utility model has a simple structure, a long service life, no electromagnetic interference, strong recyclability, no pollution, and no harm to the human body.

[0017] (2) The utility model improves material utilization and saves costs by laying the piezoelectric units in a "V" shape; by arranging a spring mechanical ejector between the upper pressure plate and the piezoelectric unit, it is beneficial to convert the collected potential energy into electrical energy to a greater extent; by laying the light strips in a staggered manner, effective lighting is achieved while saving costs and reducing power loss.

[0018] (3) The utility model ensures the safety of the pressure power generation unit and prolongs the service life of the pressure power generation unit by laying a special floor film for biological laboratories on the upper surface of the upper pressure plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the connection structure of the utility model on stairs.

[0020] Figure 2 It is a schematic diagram of the internal connection structure of the pressure power generation unit.

[0021] Figure 3 It is the circuit diagram of the three-voltage rectifier and filter circuit.

[0022] Figure 4is the circuit diagram of LM7805 regulator circuit. DETAILED DESCRIPTION

[0023] A pedal-type power generation lighting system, such as Figure 1 As shown, it includes a pressure power generation unit 1, an energy conversion unit 2, an energy storage unit 3, a controller 4 and a light strip 5 connected in sequence, the pressure power generation unit 1 is arranged on the upper surface of each step 6 of the stairwell, the energy conversion unit 2, the energy storage unit 3 and the controller 4 are all arranged on the side of the stairs, the light strip 5 is arranged at the front edge of each step 6 of the stairwell and the setting position points of the light strips 5 of adjacent steps 6 are connected to form a triangle.

[0024] The pressure power generation unit 1 includes an upper pressure plate 11, a lower pressure plate 12, and a plurality of piezoelectric units 13 located between the upper pressure plate 11 and the lower pressure plate 12. The upper pressure plate 11 and the lower pressure plate 12 are respectively used to withstand the pressure generated by pedestrians stepping on them and the pressure of the pressure power generation unit 1 on the ground. The upper pressure plate 11 is pressed against the piezoelectric unit 13, so that the piezoelectric unit 13 is converted into electrical energy by using the positive piezoelectric effect.

[0025] The piezoelectric unit 13 is formed by stacking and connecting multiple piezoelectric ceramic sheets in parallel. The metal end caps of the upper and lower adjacent piezoelectric ceramic sheets are short-circuited and placed in opposite polarization directions. The piezoelectric ceramic sheets are connected in parallel through wires to increase the power generation of the unit and meet the energy requirements for normal operation of the lighting system. In this embodiment, the piezoelectric ceramic sheet is a PZT-5H piezoelectric ceramic sheet.

[0026] The applicant has found through observation and statistics that when people go up and down stairs, the 1 / 2 and 1 / 4 areas on the upper surface of the steps are most likely to be subjected to pressure. Based on this, a plurality of piezoelectric units 13 are designed to be arranged in a "V" shape, such as Figure 2 As shown. It aims to collect the potential energy and kinetic energy of pedestrians going up and down the stairs to the greatest extent, so as to reduce costs while ensuring the lighting effect, which is more economical.

[0027] Since the pressure of pedestrians stepping on the pedals is different each time, the magnitude of the current generated is different. Therefore, the energy conversion unit 2 adopts the following method: Figure 3 The three-voltage rectifier filter circuit shown converts the unstable electric energy generated by the pressure power generation unit 1 into stable electric energy that is easy to store; and Figure 4 The LM7805 regulator circuit shown performs voltage regulation to stabilize the output voltage, thereby improving the energy output efficiency of the pressure power generation unit 1 and reducing the loss of component power.

[0028] The energy storage unit 3 includes a synchronous charge extraction circuit board and a lithium iron phosphate battery block. The stable current output by the energy conversion unit 2 is sent to the energy storage unit 3 composed of the synchronous charge extraction circuit board and the lithium iron phosphate battery block to power the light strip 5.

[0029] In this embodiment, in order to maximize the collection of potential energy and use it for power generation, the applicant provides a plurality of spring mechanical ejectors between the upper pressure plate 11 and the piezoelectric unit 13. When a person steps on the upper pressure plate, the upper pressure plate moves downward to drive the spring mechanical ejector to press down, and transmits the pressure to the piezoelectric unit 13. When the pressure is removed, the spring mechanical ejector pops up. The piezoelectric ceramic sheet generates electricity by deformation, and under a certain external pressure, compared with the upper pressure plate 11 directly applying pressure to the piezoelectric ceramic sheet, the contact area between the spring mechanical ejector and the piezoelectric ceramic sheet is greatly reduced, so the pressure is greater. The spring mechanical ejector serves as the support point of the upper pressure plate 11. Even if a person does not step on the power generation area, the force can still be transmitted to the piezoelectric ceramic sheet by the spring mechanical ejector, thereby achieving more effective collection of potential energy.

[0030] In this embodiment, the upper surface of the upper pressure plate 11 is paved with a floor film, which is anti-slip and waterproof and easy to clean, thereby improving its safety and hygiene. The pressure power generation unit 1 is connected to the step 6 by sliding the slide rail 7 to the left and right, thereby facilitating modular installation and subsequent promotion and application.

[0031] The utility model utilizes the positive piezoelectric effect of piezoelectric ceramic sheets to convert the potential energy and kinetic energy of pedestrians when they step on the ground into electrical energy, introduces the generated alternating current into the energy conversion unit 2 through a wire for rectification and filtering, and stores the electrical energy through the energy storage unit 3, and then utilizes the electrical energy through the controller 4 and the light strip 5, thereby forming a complete set of work processes for generating, transferring, storing and using electricity, converting wasted potential energy into electrical energy, and realizing energy regeneration.

[0032] The utility model adopts piezoelectric ceramic sheets to generate electricity and lithium iron phosphate storage blocks to store electricity. It has a simple structure, no electromagnetic interference, strong recyclability, no pollution, and is harmless to the human body. And the piezoelectric ceramic sheets have the characteristics of long life. The more piezoelectric units 13 there are, the stronger the pressure resistance. In terms of electricity, assuming that each pressure power generation unit 1 is installed with 15 piezoelectric ceramic sheets, taking the average weight of 55 kg as an example, the output power of one step is 1.20 watts. An average of 1,500 people in a college step twice a day, with 26 steps on each floor, and about 94 degrees of electricity are generated a day. When the campus is in normal operation (excluding winter and summer vacations), 22,362.2 degrees of electricity will be collected in a year. Calculated based on the market's lowest electricity price of 0.56 yuan / degree, a teaching building can save 12,522.8 yuan in electricity bills per year.

[0033] The parts not described in the present invention can be realized by adopting or drawing on the existing technology.

[0034] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A pedal-type power generation and lighting system, characterized in that: It includes a pressure power generation unit, an energy conversion unit, an energy storage unit, a controller and a light strip connected in sequence, wherein the pressure power generation unit is arranged on the upper surface of each step of the staircase, the energy conversion unit, the energy storage unit and the controller are all arranged on the side of the staircase, and the light strip is arranged at the front edge of each step of the staircase, and the setting position points of the light strips of adjacent steps are connected to form a triangle; The pressure power generation unit includes an upper pressure plate, a lower pressure plate, and a plurality of piezoelectric units arranged in a V shape between the upper pressure plate and the lower pressure plate; The piezoelectric unit is formed by stacking and connecting a plurality of piezoelectric ceramic sheets in parallel, wherein the metal end caps of the upper and lower adjacent piezoelectric ceramic sheets are short-circuited and placed in opposite polarization directions, and connected by wires to realize parallel connection of the plurality of piezoelectric ceramic sheets; The energy conversion unit adopts a three-voltage rectifier filter circuit to convert the unstable electric energy generated by the pressure power generation unit into stable electric energy that is easy to store, and adopts an LM7805 regulator circuit to regulate the voltage.

2. The pedal-type power generation and lighting system according to claim 1, characterized in that: The energy storage unit includes a synchronous charge extraction circuit board and a lithium iron phosphate battery block.

3. The pedal-type power generation and lighting system according to claim 2, characterized in that: A plurality of spring mechanical ejectors are arranged between the upper pressure-bearing plate of the pressure power generation unit and the piezoelectric unit.

4. The pedal-type power generation and lighting system according to claim 3, characterized in that: The piezoelectric ceramic piece is a PZT-5H piezoelectric ceramic piece.

5. The pedal-type power generation and lighting system according to claim 4, characterized in that: The upper surface of the upper pressure plate is paved with a floor film.

6. The pedal-type power generation and lighting system according to claim 5, characterized in that: The pressure power generation unit is connected to the step by sliding the slide rail left and right.

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