Surface acoustic wave electric current sensor

Abstract

The invention relates to a surface acoustic wave (SAW) electric current sensor which comprises a piezoelectric substrate, a first line of reflectors, a second line of reflectors and a thin film layer. The piezoelectric substrate serves as a vibrating membrane, the first line of reflectors comprise the first interdigital reflector serving as a reference and the second interdigital reflector used for measuring electric currents, the second line of reflectors serve as electronic tags, and the first line of reflectors and the second line of reflectors are coated with the thin film layer. First electromagnetic wave signals sent by a reading module are received through a wireless antenna, the first electromagnetic wave signals are converted into SAWs spread along the surface of the piezoelectric substrate through an EWC/SPUDT, the SAWs are converted into second electromagnetic wave signals through the EWC/SPUDT after being reflected by the first line of reflectors and the second line of reflectors, the second electromagnetic wave signals are transmitted back to the reading unit through the wireless antenna, through a signal processing method, the current detection is carried out by obtaining the signal transformation of the time-domain response of the SAW electric current transducer.

Description

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AI Technical Summary

Benefits of technology

The inventors developed an improved type called radioactive SAW (acoustic wave) flow meter that can accurately measure electricity flows at very low voltages while also being able to withstand temperatures up to 100 degrees Celsius. This technology allows for better monitoring of these types of conditions without having to be installed permanently or requiring expensive equipment.

Problems solved by technology

Technological Problem addressed in this patented technical problem relating to the limitations associated with traditional SAW type detectors used in electronic currents applications include instability over varying temperatures during operation, reduced efficiency or sensibility resolution, limited usages in different environmental situations, difficulty in manufacturing large quantities of these types of components, and potential issues like low reliabilities in long term measurements.

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