Design of a Micro-Vibration Rate And Displacement Detection Radar

• Main Authors: JIANG,JIA-HAO, 蔣嘉豪
• Other Authors: Sheng-Fuh Chang
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/q7a5f6

碩士 === 國立中正大學 === 電機工程研究所 === 105 === In this thesis, a high-sensitive non-contact microwave micro-vibration detector was designed, based on standing-wave envelope demodulation technique. This highly-integrated detector includes a standing-wave envelope demodulation radar, microprocessor, bluetooth, and mobile-phone App software. This detector is also incorporated with LCD display, Wi-Fi and GPS modules for further application extension. The core signal processing in this detector are: first, system calibration algorithm for elimination of hardware RF impairments; Second, automatic phase shifting algorithm for maximal detection accuracy and sensitivity; and Third, the relative displacement computation for vibration displacement estimation. The size of demonstrated detector is 5.3×4.1 cm2 and the dc power consumption is 450 mW. The experimental results show that for a 1.50 Hz, 10 m vibration metal plate of 12×8 cm2, the detection error rate is less than 0.01 Hz (0.6%). Moreover, for human wrist pulse non-contact wearable measurement, the root-mean-squared error is 0.8-1.3 BPM, compared with hand count and with commercial blood-pressure and pulse meter.