3 ms·
FMCW radar is great for precise detection, and TFA does a good job of describing it. It would do an even better job if it also mentioned that an FMCW based hum
by jesperwe 4y ago
FMCW radar is great for precise detection, and TFA does a good job of describing it.
It would do an even better job if it also mentioned that an FMCW based human presence detector consumes several orders of magnitude more power than a PIR sensor, which means battery operation will either make the sensor very large or require frequent battery changes.
- tgv 4y agoPrecise? May depend on usage. I worked at a company that used them for measuring traffic, but the speed detection was not good. Vehicles have multiple reflecting surfaces, and it's hard to interpret multiple reflections.