US Patent No. 9,375,153

MOTION/VIBRATION SENSOR


Patent No. 9,375,153
Issue Date June 28, 2016
Title Motion/vibration Sensor
Inventorship Tzyy-Sheng Horng, Kaohsiung (TW)
Fu-Kang Wang, Kaohsiung (TW)
Kang-Chun Peng, Kaohsiung (TW)
Assignee INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE, Hsinchu (TW) NATIONAL SUN YAT-SE...

Claim of US Patent No. 9,375,153

1. A motion/vibration sensor, including:
a transmit/receive antenna unit;
an oscillation unit, coupled to the transmit/receive antenna unit; and
a frequency-mixing unit coupled to the transmit/receive antenna unit and the oscillation unit;
wherein the transmit/receive antenna unit receives an output signal from the oscillation unit and transmits a detection signal
toward at least one object according to the output signal;

the detection signal is reflected by the object as a reflected detection signal and received by the transmit/receive antenna
unit;

the oscillation unit receives the reflected detection signal from the transmit/receive antenna unit for self-injection locking
and the frequency-mixing unit receives the reflected detection signal from the transmit/receive antenna unit for frequency
demodulation; and

the frequency-mixing unit mixes and demodulates the reflected detection signal from the transmit/receive antenna unit with
the output signal from the oscillation unit into a baseband output signal which represents a motion/vibration information.