Optically powered transducer module
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United States of America Patent
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Feb 27, 2018
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app pub date -
May 20, 2016
filing date -
May 20, 2016
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Abstract
A sensor assembly comprises a remote data concentrator (RDC) and an optically powered transducer module (OPTM). The RDC transmits a first optical pulse including a parameter request signal along an optical fiber. The OPTM is connected to the optical fiber, and comprises a photodiode, an energy storage device, a sensor, a processor, and a laser. The photodiode receives the first optical pulse, and the energy storage device is charged by the photodiode. The sensor, processor, and laser are powered by discharging the energy storage device. The sensor senses a parameter specified by the parameter request signal. The processor generates a signal packet from the output of the first sensor. The laser transmits a second optical pulse including the signal packet along the optical fiber to the RDC.
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