Spring type nanometer generator and self-driven dynamometer

Abstract

The invention provides a piezoelectric nanometer generator prepared by taking a spring as a base, and a self-driven dynamometer based on the nanometer generator. The spring type nanometer generator comprises a spring base, a conductive outer surface included by a spring wire forming the spring base, a piezoelectric body layer and an outer electrode, wherein the piezoelectric body layer is tightly contacted with the outer side of the conductive outer surface, and the outer electrode is tightly contacted with the outer side of the piezoelectric body layer. The piezoelectric body layer can generate a piezoelectric effect under the condition that deformation of the spring base occurs, and outputs electric signals to an external circuit through the conductive outer surface and the outer electrode. A self-driven pressure sensor and the measurement can be realized by using the advantage that the compression distance of the spring has a linear relation with an applied external force. The self-driven dynamometer provided by the invention is small in size, and can be arranged in various mechanical components conveniently; and the self-driven dynamometer does not need an external power supply during operation, and has the advantages of safety, reliability, environmental protection and the like, thereby being of great significance for sustainable development of intelligent transportation and modern industries.

Description

technical field [0001] The invention provides a spring-based piezoelectric nanogenerator, in particular a self-driven force measuring instrument based on the nanogenerator. Background technique [0002] The proposal and development of the concept of "wireless sensor network" is of great significance to the progress and development of today's society. A variety of different forms of sensors, including biological, chemical, gas, pressure, temperature, etc., can be used as the basic components of sensor networks. However, traditional sensor devices require an external DC power source (such as a battery) to drive the device, which adds a lot of burden and cost to the entire system, such as the cost of battery replacement and the increase in system weight of the battery itself. [0003] In recent years, the advent of self-driven pressure sensors based on piezoelectric nanogenerators has largely suggested a possible solution to this problem. The principle of this self-driven pre...

AI Technical Summary

Problems solved by technology

However, the existing self-driven pressure sensors are all flat thin-layer devices. Although the size is small, the mechanical strength is not high, the upper limit of the pressure source that can withstand is low, and it always needs to be fixed on some mechanical devices in a certain way. components or other devices, which may cause inconvenience to the normal operation of these components, so it is subject to certain restrictions in application

In addition, the stable correlation between the pressure source and the output signal is also a key issue restricting the application of pressure sensors.

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