Motion/vibration sensor
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
A motion/vibration sensor includes a transmit/receive antenna unit, an oscillation unit and a frequency-mixing unit. The transmit/receive antenna unit receives an output signal from the oscillation unit and transmits a detection signal toward at least one object. 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. 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.
68 Citations
19 Claims
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1. A motion/vibration sensor, including:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A motion/vibration sensor, including:
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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 oscillation unit outputs a first output signal to the transmit/receive antenna unit and outputs a second output signal to the frequency-mixing unit; the transmit/receive antenna unit receives the first output signal and transmits a detection signal toward at least one object according to the first output signal; the transmit/receive antenna unit receives a reflected detection signal from the at least one object which reflects the detection signal as the reflected detection signal; the transmit/receive antenna unit receives the reflected detection signal as a first injection signal and a second injection signal; the oscillation unit receives the first injection signal from the transmit/receive antenna unit for self-injection locking; the frequency-mixing unit mixes and demodulates the second injection signal from the transmit/receive antenna unit with the second output signal from the oscillation unit into a baseband output signal which represents a motion/vibration information. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification