The Doppler motion sensor I bought only outputs a non-amplified signal of a few micro-volts, whose frequency represents the speed at which an object is moving towards or away from the sensor.

According to [Mathieu], the answer is also yes, but only if you ignore the datasheet circuit and build this amplification circuit for your dirt cheap Doppler ... speed for the sensor is only ...

This acoustic doppler data is then further analyzed by something called an "acoustic vector sensor" (AVS) to create a more dynamic picture of traffic patterns. "We can calibrate an acoustic vector ...

The Doppler sensor works by bouncing harmless wave signals off of objects to detect whether they are in motion. When changes in wavelength are detected, the lights are triggered to turn on.

It used to be the case that if you bought a compact camera you’d have a small sensor, and if you went for an interchangeable-lens camera like a DSLR you got a much larger one. This would also ...