WIRELESS AND BATTERY-LESS MONITORING UNIT
First Claim
1. A wireless and battery-less sensor device, comprising:
- a mechanical energy harvesting module;
a sensor electrically coupled to the mechanical energy harvesting module and configured to sense with power supplied by the mechanical energy harvesting module;
nonvolatile memory configured to store output from the sensor;
a radio frequency energy harvesting module; and
a radio frequency transmitter electrically coupled to the radio frequency energy harvesting module, the radio frequency transmitter configured to transmit the output from the sensor with power supplied by the radio frequency energy harvesting module.
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Accused Products
Abstract
A wireless and battery-less sensor device is described. The sensor device includes a mechanical energy harvesting device, a sensor electrically coupled to the mechanical energy harvesting module. The sensor is configured to sense with the power supplied by the mechanical energy harvesting device. Nonvolatile memory is configured to store output from the sensor. A radio frequency energy harvesting module is electrically coupled to a radio frequency transmitter. The radio frequency transmitter is configured to transmit the output from the sensor with the power supplied by the radio frequency energy harvesting device. Systems and methods utilizing the wireless and battery-less sensor device are also described.
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Citations
20 Claims
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1. A wireless and battery-less sensor device, comprising:
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a mechanical energy harvesting module; a sensor electrically coupled to the mechanical energy harvesting module and configured to sense with power supplied by the mechanical energy harvesting module; nonvolatile memory configured to store output from the sensor; a radio frequency energy harvesting module; and a radio frequency transmitter electrically coupled to the radio frequency energy harvesting module, the radio frequency transmitter configured to transmit the output from the sensor with power supplied by the radio frequency energy harvesting module. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system to monitor a body, comprising:
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a body to be monitored; a remote radio frequency interrogation device; and at least one wireless and battery-less sensor device disposed to monitor the body and transmit sensed output to the remote radio frequency interrogation device, the sensor device comprising; a mechanical energy harvesting module providing electrical power to a sensor, the sensor providing an output; nonvolatile memory configured to store the output; and a radio frequency energy harvesting module providing electrical power to a radio frequency transmitter for transmission of the output stored in the nonvolatile memory to the remote radio frequency interrogation device. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method of monitoring a body, comprising:
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positioning at least one wireless and battery-less sensor device to monitor a body, the wireless and battery-less sensor device comprises; a mechanical energy harvesting module; a sensor; nonvolatile memory; a radio frequency energy harvesting module; and a radio frequency transmitter; generating electrical power with the mechanical energy harvesting module; sensing a load on the sensor with power supplied by the mechanical energy harvesting module; storing the load as output data in the nonvolatile memory; detecting radio frequency energy with the wireless and battery-less sensor device; generating electrical power with the radio frequency energy from the radio frequency energy harvesting module; and transmitting the stored output data from the nonvolatile memory to a remote radio frequency interrogation device with power supplied by the radio frequency energy harvesting module. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification