Self-driven sensing system based on friction nanogenerator capacitive load matching effect

Abstract

The invention provides a self-driven sensing system which comprises a friction nanogenerator and a capacitance-type sensor. The friction nanogenerator is used for converting external mechanical energyinto electric energy and outputting an electric signal to an external circuit; the capacitance-type sensor is connected with the friction nanogenerator so as to be powered by the friction nanogenerator and used for detecting a sensing signal. The self-driven sensing system provided by the invention can be applied to any occasion capable of producing the mechanical energy, and can supply power tothe sensor in real time. The self-driven sensing system is characterized in that no external power supply is needed, the power supply problem of the sensor is solved, the adaptability of an internet-of-things device is improved, and the size and the weight of the system are greatly reduced. According to the system provided by the invention, the stability and the controllability are greatly improved. The friction nanogenerator and the sensor are separated, so that a friction material and a sensing material do not influence each other, a material selecting range is enlarged without being influenced by a mechanical movement frequency, and the system has an actual application value.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a self-driven sensor system based on the capacitive load matching effect of a friction nanogenerator. Background technique [0002] With the continuous improvement of urban living standards and the continuous development of the economy, the intelligent Internet of Things has brought great convenience and a qualitative leap to human life. The rapid development of the Internet of Things needs to rely on the establishment and efficient operation of multi-functional sensor networks. However, for sensors that independently maintain their continuous work, the problem of power supply has become a bottleneck that restrains their network-based development. If each sensor must be powered by a battery, the volume and quantity of the power supply system are too large, even far larger than the sensor network itself, such a sensor network is almost impossible to realize, which is a huge limita...

AI Technical Summary

Problems solved by technology

[0006] One purpose of the present invention is to solve the technical problems that the existing self-driven sensing system has a large volume, is greatly affected by the external environment, has a limited selection range, and needs to be monitored at a specific frequency

[0007] A further object of the present invention is to solve the technical problem that the existing self-driven resistive sensing system that separates the friction material and the sensitive material has different output voltages under different frequencies and the same external conditions, and is easily affected by frequency

[0008] A further object of the present invention is to solve the technical problem that the existing capacitive sensors need to connect multiple individual capacitive sensors in parallel to obtain a larger capacitance, resulting in complex systems and larger volumes

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