Piezo Energy Generator 60x30mm

Piezo Energy Generator 60x30mm

Piezoelectric ceramics are used as experimental materials, and piezoelectric ceramic-polymer composites are used as piezoelectric composites composed of inorganic piezoelectric ceramics and organic polymer resins. They have the properties of both inorganic and organic piezoelectric materials. They have a simple structure and are not easily affected. Electromagnetic interference, easy to process and manufacture, and the structure is easy to realize the characteristics of miniaturization, integration and portability. 

According to the needs, the advantages of the two materials can be combined to make transducers and sensors with good performance. The latest technology has produced materials with a larger piezoelectric coefficient than before, laying a solid foundation for the wide application of piezoelectric ceramics in the future. Therefore, the piezoelectric sensor made of piezoelectric ceramics has higher sensitivity, is more conducive to the collection and storage of electric energy, and has a good market prospect. 

This “concentrated load piezoelectric ceramic power generation device” adopts piezoelectric ceramic material, a new inorganic non-metallic functional ceramic material manufacturing technology. Under the action of force, deformation occurs, causing the surface of the medium to be charged, and the positive piezoelectric effect is generated; In terms of conversion, the use of piezoelectric ceramics to convert mechanical energy into electrical energy, circuit design technology and power transmission technology, use the piezoelectric effect to achieve mutual conversion of mechanical energy and electrical energy. 1 Prototype and experimental research of electric ceramic power generation device The experimental device consists of power generation device, filter device, energy storage device and electrical device. The power generation device is composed of a piezoelectric vibrator. The piezoelectric vibrator is composed of a metal sheet and a piezoelectric sheet. 

Paste the piezoelectric sheet on the metal surface, and draw electrodes from the metal sheet and the piezoelectric sheet. The pressure generated by human walking will cause the piezoelectric vibrator to deform, which in turn causes the strain and stress in the piezoelectric layer to change. According to the piezoelectric effect of piezoelectric ceramics, an electric charge is generated on the surface of the piezoelectric sheet, thereby generating a voltage. In the experiment, the input is mechanical energy and the output is electrical energy. Because the energy generated during human walking is unstable, the voltage output by the piezoelectric vibrator is not a stable value, so the voltage stabilizing and filtering device is used for rectification and filtering. At this time, the output voltage is a stable value, which can be used for storage and application. Because the energy generated by the piezoelectric vibrator in each vibration period is very small, and the output is high-voltage and low-current alternating current. In the experiment, the piezoelectric ceramics are connected in parallel to obtain a larger current. In practical applications, in order to improve the energy capture efficiency of the entire system, it is often necessary to add different types of DC-DC step-down between the rectifier circuit and the storage medium. Increased current circuit, through experimental verification, the addition of step-down and current increase circuit can often make the efficiency of the entire system more than doubled. 2 The overall design of the experiment 2.1 Research on the relationship between the pressure on the electroceramics and its power generation capacity In this experiment, a piezoelectric sheet with a diameter of 20mm is used as the power generation material, the piezoelectric sheet is used as the positive electrode, and the copper wire is used as the negative electrode. 

The light-emitting diode is used as the load, and the measured voltage is the voltage at the load terminal. In the experiment, people of different weights were taken as the experimental subjects. The voltage generated by stepping on the ceramic during normal walking was counted and sorted. Record the set of experimental data, calculate the average and maximum value of the generated voltage (the data measured in the experiment are all the average of the output voltage). 2.2 In the experiment to explore the relationship between power generation efficiency and the number of piezoelectric ceramics, in order to explore the power generation efficiency of the piezoelectric vibrator, a device was made to estimate the power generation efficiency of the piezoelectric vibrator by measuring the charging time of the capacitor. The device consists of a rectifier unit, a filter unit, and a stable It is composed of a voltage unit and an energy storage unit. The energy storage unit is composed of five 2200µF, 35V capacitors in parallel. Using rectification, filtering, and voltage stabilization unit to step down and increase the current of the electric energy output by the piezoelectric vibrator, and the output is a stable 9V voltage. Taking a person weighing 65 kg as the experimental subject, the time required for the two ends of the capacitor to reach the voltage stabilization voltage under different numbers of piezoelectric ceramic slices under normal walking conditions was measured and analyzed. 

Conclusion: 

1. The open circuit voltage generated by piezoelectric ceramics is related to the pressure it receives, and in an ideal state, with the increase of pressure, the greater the open circuit voltage. 

2. Under the condition of a certain pressure, the power generation capacity of the piezoelectric ceramic device shows an increasing trend with the increase of the number of pieces. 

3. This device can convert the unusable mechanical energy generated when a person walks into usable electrical energy, and the generated electrical energy can be used directly for power supply or for storage. Moreover, the device is simple, easy to install, low cost, and high utilization rate. It can not only be used in pedestrian streets, stations and other crowded areas, but also can be used as a portable power source to charge low-power electrical appliances such as mobile phones. It can also be installed on some machinery and use its vibration during work to charge itself.