Wireless sensor unit
First Claim
Patent Images
1. A wireless ambient sensor unit, comprising:
- a frequency-hopping spread spectrum transceiver configured to transmit sensor data and to receive instructions;
at least one sensor configured to measure an ambient condition; and
a controller configured to control said transceiver and said at least one sensor, said wireless sensor unit configured to report data measured by said at least one sensor when said wireless sensor unit determines that data measured by said at least one sensor fails a threshold test, said sensor unit configured to operate in a low-power mode when not transmitting data or receiving instructions, said sensor unit configured to transmit status information at regular intervals and to enter a receive mode for a period after transmitting said status information, said sensor unit having an identification code and configured to implement instructions addressed to the sensor unit according to said identification code.
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Abstract
A low cost, robust, wireless sensor that provides an extended period of operability without maintenance is described. The wireless sensors are configured to communicate with a base unit or repeater. When the sensor unit detects an anomalous ambient condition (e.g., smoke, fire, water, etc.) the sensor communicates with the base unit and provides data regarding the anomalous condition. The sensor unit receives instructions to change operating parameters and/or control external devices.
195 Citations
36 Claims
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1. A wireless ambient sensor unit, comprising:
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a frequency-hopping spread spectrum transceiver configured to transmit sensor data and to receive instructions;
at least one sensor configured to measure an ambient condition; and
a controller configured to control said transceiver and said at least one sensor, said wireless sensor unit configured to report data measured by said at least one sensor when said wireless sensor unit determines that data measured by said at least one sensor fails a threshold test, said sensor unit configured to operate in a low-power mode when not transmitting data or receiving instructions, said sensor unit configured to transmit status information at regular intervals and to enter a receive mode for a period after transmitting said status information, said sensor unit having an identification code and configured to implement instructions addressed to the sensor unit according to said identification code. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A wireless ambient sensor unit, comprising:
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a frequency-hopping spread spectrum transceiver configured to transmit sensor data and to receive instructions;
means for sensing an ambient condition; and
a controller configured to control said transceiver and said at least one sensor, said wireless sensor unit configured to report data measured by said means for sensing when said wireless sensor unit determines that data measured by said means for sensing fails a threshold test, said sensor unit configured to operate in a low-power mode when not transmitting data or receiving instructions, said sensor unit configured to transmit status information at regular intervals and to enter a receive mode for a period after transmitting said status information, said sensor unit having an identification code and configured to implement instructions addressed to the sensor unit according to said identification code. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification