Use of a time-variation ultrasonic signal and PIR sensors to enhance the sensing reliability of an embedded surveillance system. - Ying-Wen Bai; Chen-Chien Cheng; Zi-Li Xie (CCECE, 2013)

Use of ultrasonic signal coding and PIR sensors to enhance the sensing reliability of an embedded surveillance system. - Ying-Wen Bai; Chen-Chien Cheng; Zi-Li Xie (SysCon, 2013)