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Concurrent Battery-Free Wireless Strain Sensing Using Backscatter Communication
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DOI：10.1109/LSENS.2025.3637817.png)
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Abstract
En 中文
This letter presents a novel battery-free wireless strain sensing system consisting of an interrogator and single or multiple streaming sensors. A streaming sensor comprises a radio frequency integrated circuit (RFIC), a commercial off-the-shelf strain gauge, and an analog-to-digital converter (ADC). Backscatter communication in the 920 MHz band is employed to both power the sensor and to establish communication. The emerging ISO/IEC 18000-65 (FDIS), which supports concurrent backscatter streaming, is adopted as the communication protocol. The ADC sampling rate and the backscatter frequency channel are over-the-air configurable through a glue logic between the RFIC and the ADC. The proposed system was evaluated in an indoor propagation environment. It was experimentally demonstrated that the proposed system can achieve an error free concurrent strain measurement with a measurement resolution in the order of 10(-5) and reading distance of 1.8 m using a 4-W effective isotropic radiation power software defined interrogator.
Keywords:
Strain measurement
Sensors
Strain
Wireless sensor networks
Wireless communication
Radiofrequency integrated circuits
Logic
Antenna measurements
Capacitive sensors
Backscatter
Sensor networks
analog-to-digital converter (ADC)
backscatter communication
concurrent and multipoint measurement
glue logic