Label, system and application method for measuring surface strain of metal component

Abstract

The invention discloses a label, a system and an application method for measuring surface strain of a metal component. In order to break through active and wire limitations in the traditional strain sensor, an RFID (radio frequency identification) technology is used to provide a new idea for designing the strain sensor, and non-contact strain measurement without an external wire power supply can be realized. The RFID system used for measuring the surface strain of the metal component consists of a reader and the label used for measuring the surface strain of the metal component, wherein the label used for measuring the surface strain of the metal component is fixed to the to-be-measured metal component, and comprises an RFID antenna and a chip; the RFID antenna comprises an upper radiation paster, a lower radiation paster, a dielectric plate and a matching wire; the label is adhered to the metal surface of the to-be-measured metal component through the lower radiation paster of the RFID antenna; and the chip is connected with the upper radiation paster and the lower radiation paster through the matching wire.

Description

technical field [0001] The invention relates to the field of measuring the surface strain of a metal component. Background technique [0002] Currently commonly used strain sensors include resistive strain gauges, vibrating wire strain gauges and Bragg grating sensors. Resistive strain gauges can convert strain changes into resistance changes, and further convert them into voltage or current changes through the bridge; vibrating wire strain gauges use the relationship between the resonant frequency of the string and the strain to measure the strain; the principle of the Bragg grating sensor is It is based on the theory of fiber grating Bragg wavelength shift. These strain sensors have their own advantages. In practical engineering applications, the appropriate strain sensors can be selected according to the site conditions, but they also have insurmountable shortcomings: the sensor layout and signal acquisition are wired, the operation is complicated, there are many leads, ...

AI Technical Summary

Problems solved by technology

These strain sensors have their own advantages. In actual engineering applications, the appropriate strain sensors can be selected according to the site conditions, but they also have insurmountable shortcomings: the sensor layout and signal acquisition are wired, the operation is complicated, there are many leads, and the acquisition equipment The price is expensive. Although some wireless communication methods such as Zigbee and Wifi have been used for improvement, this shortcoming cannot be fundamentally overcome; real-time power supply is required during the signal acquisition process, and the structure may break down when it experiences a disaster. The problem of power failure caused the signal acquisition system to fail to obtain data when the disaster occurred

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