Pneumatic friction nano-generator and sensor and sensing method in pneumatic system

Abstract

The invention discloses a pneumatic friction nano-generator, and the nano-generator comprises a cylinder and a piston in a pneumatic system, and a friction generating component, wherein the piston isdisposed in the cylinder and is slidable relative to the cylinder. The friction generating component comprises a first friction layer and a second friction layer, which are respectively disposed on anouter side wall of the piston and an inner sidwall of the cylinder, and the material of the upper surface of the first friction layer and the material of the second friction layer have a frictional electronegativity difference. When the piston slides relative to the cylinder, the first friction layer and the second friction layer slide relative to each other and the contact area changes, and thefriction generating component generates an electrical signal. The invention also provides a sensor and sensing method in a pneumatic system. The generator of the invention can convert the pressure energy or mechanical energy generated by the fluid and a piston in the pneumatic system into electric energy, provides a continuous energy supply device for a low-power sensor in the pneumatic system, and can also be used as a self-driving sensor for monitoring the pneumatic system, wherein the continuous energy supply device can be used for monitoring the operating status of various functional components in the pneumatic system.

Description

technical field [0001] The invention relates to the technical field of friction power generation, in particular to a pneumatic friction nanogenerator, a sensor in a pneumatic system and a sensing method. Background technique [0002] With the continuous improvement of the intelligent level of the pneumatic system and its deep integration with Internet technology, a large number of low-power sensors are widely used in the pneumatic system to monitor the working status of various functional components in the pneumatic system. Stable and reliable continuous power supply to each sensor is the prerequisite to ensure its normal operation. However, the research on power supply systems matching these low-power sensors is relatively lagging behind. The current energy supply methods for low-power sensors in pneumatic systems mainly include direct power supply and chemical battery power supply. Among them, the direct power supply method has problems such as serious electromagnetic int...

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Problems solved by technology

[0003] On the other hand, pressure and flow sensors based on the principles of sound waves, piezoresistance, and electrostatic capacitance, and position detection sensors based on the Hall effect, which are widely used in pneumatic systems, have achieved some research results, but the working principles and fabrication of most sensors The process is complex, and it is impossible to monitor the working status of each functional component in the pneumatic system in real time

And most of the sensors are installed externally, the integration level is low, and at the same time, an external power supply is required, which has certain limitations in use.

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