Wireless power supply device and method based on lamb wave

Abstract

A wireless power supply device and method based on a lamb wave are provided. The device comprises a signal generator, a voltage amplifier, an excitation transducer, a metal sheet member, a receiving transducer, an energy acquisition circuit and an energy storage element, and has advantages that the Lamb wave in the metal sheet member is used as an energy carrier so as to achieve wireless transmission of energy and to power a structure health monitoring sensor on the metal sheet member, thereby reducing the wiring and maintenance cost of a traditional sensor system and improving system stability. A piezoelectric ceramic transducer is used as a main component, high in conversion efficiency, small in size, and low in cost. Because of an active excitation way, the Lamb wave frequency can be close to the resonant frequency of the excitation and reception transducers, thereby greatly improving the efficiency of the traditional method. The lamb wave belonging to the ultrasonic waveguide is as the energy carrier, so the energy is low in attenuation and high in transmission efficiency. Since the transmission is in a continuous mode, it is not necessary to consider the frequency dispersion effect of the Lamb wave.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic wireless energy transmission, and in particular relates to a wireless energy supply device and method based on Lamb waves. Background technique [0002] Sheet metal components, especially sheet metal parts with a thickness of less than 8mm, are widely used in aerospace, automobile, shipbuilding, pressure vessels, and large chemical containers. Due to damage and destruction of sheet metal components during production and use, it poses a great threat to the safety of its structure. On-line, real-time and effective monitoring through structural health monitoring technology, so that timely detection of fatigue and damage in these materials is very important to prevent accidents. [0003] Structural health monitoring technology needs to use the sensor system integrated or attached to the structure to obtain information related to the structural health status online and in real time, and combine sig...

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Problems solved by technology

[0008] In order to solve the above problems, the purpose of the present invention is to provide a wireless energy supply device and method based on Lamb waves, which is used to solve the problem in the prior art that the metal sheet health monitoring sensor is powered by cables or batteries, so as to provide a Power supply technology that is more stable, longer-lasting, and does not require frequent operations by personnel

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