Wireless Heart Rate Surveillance
A team of researchers at the University of California, Santa Cruz, has developed an innovative proof of concept for a system called Pulse-Fi. This groundbreaking technology uses conventional Wi-Fi routers to measure pulse rates with clinical accuracy, without the need for physical sensors or wristbands.
The primary device used in the proof of concept was an ESP32, but a Raspberry Pi was also able to perform the same trick. Interestingly, the Raspberry Pi appeared to work better, although it is more expensive than the ESP32.
The Pulse-Fi system works by monitoring how heart rates affect Wi-Fi channel state information. By measuring heart rates and variations in the Wi-Fi signal, the team was able to fit data for accurate heart rate prediction.
However, the system's effectiveness may vary depending on the Wi-Fi chipset used. Unique training may be required for the system to work effectively with different Wi-Fi chipsets.
The possibility of a wireless polygraph arises if enough signals like Pulse-Fi can be detected. The potential exists for Wi-Fi permutations to detect various things beyond heart rates. Other ubiquitous RF signals like Bluetooth could be used for similar purposes.
The Pulse-Fi system raises questions about its repeatability in a real-world environment. The system works on people up to ten feet away and does not require sensors or wires.
The researchers who developed the Pulse-Fi technology are from the University of California in Santa Cruz, USA. The tests were conducted there, and the system uses signals from conventional Wi-Fi routers to measure the pulse with clinical accuracy.
The development of Pulse-Fi opens up a new realm of possibilities for wireless health monitoring. With further research and development, this technology could revolutionise the way we monitor health, making it more convenient and accessible than ever before.
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