RFID tags can be used to monitor the vital signs of many people simultaneously:
Replacing devices based on 19th-century technology* and still in use, Cornell University engineers have developed a simple method for gathering blood pressure, heart rate, and breath rate from multiple patients simultaneously. It uses low-power radio-frequency signals and low-cost microchip radio-frequency identification (RFID) "tags" — similar to the ubiquitous anti-theft tags used in department stores.
The RFID tags measure internal body motion, such as a heart as it beats or blood as it pulses under skin. Powered remotely by electromagnetic energy supplied by a central reader, the tags use a new concept called "near-field coherent sensing." Mechanical motions (heartbeat, etc.) in the body modulate (modify) radio waves that are bounced off the body and internal organs by passive (no battery required) RFID tags.
The modulated signals detected by the tag then bounce back to an electronic reader, located elsewhere in the room, that gathers the data. Each tag has a unique identification code that it transmits with its signal, allowing up to 200 people to be monitored simultaneously.
The tricorder just got cheap.
*Footnote refers to the sphygmomanometer (aka blood pressure cuff or blood pressure meter) which was invented in 1881.
Monitoring vital signs over multiplexed radio by near-field coherent sensing (open, DOI: 10.1038/s41928-017-0001-0) (DX)
(Score: 0) by Anonymous Coward on Tuesday December 19 2017, @03:34AM
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