Microwave Radar with Transponder for Three-Dimensional Displacement Measurement in Structural Health Monitoring
نویسندگان
چکیده
Having combined the advantages of ground-based interferometric radar and Global Position System (GPS), a microwave radar with transponder for three-dimensional displacement monitoring method has been proposed. In this system, the active reflector ensures the long measurement distance at low antenna radiation power; the transponder provides the total solutions to antenna microwave leakage and multipath reflection problems; the phase demodulation with FFT(Fast Fourier Transform) make sure that the accuracy approach to submillimeter level. The experiment results show that the system measurement error is less than 0.32mm within 400 meters at 1.6W transmitting power, measuring speed is 10ms per time, and the displacement measurement range can reach 60mm.
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