Warning system, monitoring device and method for monitoring controlled device
AssigneeInventec Appliances Corp.
InventorShang Li
Life of this patent
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Abstract
A warning system includes a monitoring device and a controlled device, wherein the controlled device includes a wireless transmitter, a wireless receiver, a phase analyzer and a warning indicator. The wireless transmitter can transmit a detection signal, and then the controlled device responses to the detection signal and transmits a feedback signal. The wireless receiver can receive the feedback signal. The phase analyzer can analyze a phase difference between the detection signal and the feedback signal. The warning indicator can perform a warning action when the phase difference is greater than a preset value. Moreover, a method for monitoring a controlled device is disclosed in specification.
Claims17
A warning system comprising:
- at least one controlled device;
- and
- a monitoring device comprising:
- a wireless transmitter for transmitting a detection signal, wherein after the controlled device receives the detection signal, the controlled device responses to the detection signal and transmits a feedback signal;
- a wireless receiver for receiving the feedback signal;
- a phase analyzer for analyzing a phase difference between the detection signal and the feedback signal, and the phase analyzer comprising:
- a phase difference setting module for obtaining a distance parameter and setting a preset phase difference in accordance with the distance parameter;
- and
- a phase comparison module for calculating the phase difference between the direction signal and the feedback signal so as to determine whether or not the phase difference is greater than the present phase difference;
- and
- a warning indicator for performing a warning action when the phase difference is greater than the preset phase difference.
The warning system of claim , wherein the wireless transmitter comprises:
- a frequency setting module for setting a transmitting frequency;
- and
- a pulse transmitting module for periodically transmitting at least one pulse signal, which is recognized as the detection signal, in accordance with the transmitting frequency.
A monitoring device for detecting at least one controlled device, the monitoring device comprising:
- a wireless transmitter for transmitting a detection signal, wherein the controlled device responses to the detection signal and transmits a feedback signal;
- a wireless receiver for receiving the feedback signal;
- a phase analyzer for analyzing a phase difference between the detection signal and the feedback signal, and the phase analyzer comprising:
- a phase difference setting module for obtaining a distance parameter and setting a preset phase difference in accordance with the distance parameter;
- and
- a phase comparison for calculating the phase difference between the detection signal and the feedback signal so as to determine whether or not the phase difference is greater than the present phase difference;
- and
- a warning indicator for performing a warning action when the phase difference is greater than the preset phase difference.
A method for monitoring at least one controlled device, comprising:
- transmitting a detection signal, wherein the controlled device responses to the detection signal and transmits a feedback signal after receiving the detection signal;
- receiving the feedback signal from the controlled device;
- analyzing a phase difference between the detection signal and the feedback signal by obtaining a distance parameter and setting a preset phase difference in accordance with the distance parameter and calculating the phase difference so as to determine whether or not the phase difference is greater than the preset phase difference;
- and
- performing a warning action when the phase difference is greater than the preset phase difference.
Dependencies are inferred from the claim text.