MOTION SENSING IN A WIRELESS RF NETWORK
First Claim
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1. A sensor system, comprising:
- a sensor module comprising a sensor attached to a person or object and operable to measure data of the person, a microprocessor operable to process the sensor data and to generate an alert signal when the sensor data indicates an abnormal condition of the person or object, and a wireless transceiver operable to wirelessly transmit the sensor data;
a network of wireless transceiver nodes distributed at fixed locations to receive the sensor data wirelessly transmitted by the sensor module; and
a central monitor in communication with the network of wireless transceiver nodes to communicate with the sensor module and operable to obtain a location of the sensor module based on signal strengths of a signal generated by the sensor module and received by a plurality of wireless transceiver nodes close to the sensor module.
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Abstract
Techniques and systems that monitor motion of a person or object and wirelessly communicate the motion data of the person through a network of wireless communication transceiver nodes to a central monitor station. An abnormal state of motion of the person or object can be detected based on the motion data and an alert signal can be generated when an abnormal condition of the person or object occurs. Other parameters of a person or object may also be measured and transmitted to the central monitor station, such as the heart beat and body temperature of the person or the orientation or dynamic motion of an object.
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Citations
20 Claims
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1. A sensor system, comprising:
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a sensor module comprising a sensor attached to a person or object and operable to measure data of the person, a microprocessor operable to process the sensor data and to generate an alert signal when the sensor data indicates an abnormal condition of the person or object, and a wireless transceiver operable to wirelessly transmit the sensor data;
a network of wireless transceiver nodes distributed at fixed locations to receive the sensor data wirelessly transmitted by the sensor module; and
a central monitor in communication with the network of wireless transceiver nodes to communicate with the sensor module and operable to obtain a location of the sensor module based on signal strengths of a signal generated by the sensor module and received by a plurality of wireless transceiver nodes close to the sensor module. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for monitoring a person or object on a premise, comprising:
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distributing wireless transceiver nodes at fixed locations on the premise;
attaching a user wireless transceiver to a person or object to wirelessly communicate with the wireless transceiver nodes;
obtaining a location of the person or object on the premise from signal strengths of a signal generated by the user wireless transceiver received at different wireless transceiver nodes;
attaching at least a motion sensor to the person or object to measure a motion of the person or object;
using the measured motion data from the motion sensor to detect whether the person or object has an abnormal motion; and
wirelessly transmitting an alert signal through the wireless transceiver nodes when an abnormal motion of the person or object is detected. - View Dependent Claims (17, 18, 19, 20)
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Specification