Ultrasonic sound and sound wave detector based on triboelectricity nanometer generator

Abstract

This invention constructs a triboelectricity nanometer generator by utilizing a fact that polymeric materials and metal materials have various triboelectricity properties and prepares a detector with functions of detecting the ultrasonic sound and sound wave based on the nanometer generator. When the sound wave or the ultrasonic sound is transmitted to a flexible outer membrane of the detector, the flexible outer membrane or some parts of the flexible outer membrane produce corresponding mechanical vibration to enable the contact state between the flexible outer membrane and a conducting inner core to change correspondingly to drive the nanometer generator to output signals. The ultrasonic sound and sound wave detector can detect the ultrasonic sound or sound wave signals coming from various directions without power supply or charging in advance and utilizes the ultrasonic sound or the wave sound to produce mechanical vibration to realize self-driving. The light and thin flexible outer membrane is adopted, which simplifies the structure of the detector when the detection accuracy is improved, and the ultrasonic sound and sound wave detector has advantages of easy carrying, simple structure, easy usage and saving resources.

Description

technical field [0001] The invention relates to a self-driven ultrasonic and sound wave detector based on a triboelectric nanogenerator. Background technique [0002] So far, ultrasound is the only energy form that can be transmitted over a long distance in the deep sea, and the current practical technology for detecting underwater targets is only sonar technology. The receiving transducer is the core device in sonar, which converts underwater ultrasonic signals into electrical signals. According to the principle of energy conversion, there are two types of energy converters: piezoelectric and capacitive. Piezoelectric receiving transducers are sensors based on the piezoelectric effect. Its sensitive element is made of piezoelectric material, and the surface of piezoelectric material generates electric charge after being stressed. After the charge passes through the charge amplifier, the measuring circuit and the transformation impedance, it becomes the electric output pr...

AI Technical Summary

Problems solved by technology

The disadvantage is that the output is non-linear, parasitic capacitance and distributed capacitance have a greater impact on sensitivity and measurement accuracy, and the connection circuit is more complicated, etc., and the capacitor must be charged before use

[0003] The existing two underwater ultrasonic detectors have complex structures, and can only detect ultrasonic waves from a certain direction, but cannot detect ultrasonic signals from all directions. The most important thing is that they all need an external power supply to power or charge them.

Since the detector needs to work underwater for a long time, operations such as power supply or charging greatly limit its use range and reduce its use efficiency

Although some generators driven by piezoelectric and triboelectric properties have been developed, the structures of these generators are relatively complicated, and they are not suitable for efficient detection of low-intensity sound waves and high-frequency ultrasonic waves. Any kind of self-propelled sonic or ultrasonic detector is invented, which greatly affects the field of application of self-propelled generators

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