Introduction
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The specifications of Doppler radars vary by part, but in general they work as long-range, low-resolution sensors for measuring distance and velocity of obstacles.
Common Types of Radar Sensors
Doppler Radar
As explained previously, Doppler radars use the Doppler effect to calculate the velocity of moving objects. Most are also capable of determining the distance of these objects relative to the radar, simply by measuring the time taken for the transmitted wave to be received by the antenna.
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Low field of view: FOV is especially low at long range, often falling below 20°. For a complete view of the surroundings, the sensor will need to be rotated in the direction that needs to be observed
- Low resolution & accuracy: Radar sensors are not good for getting precise readings of the position and velocity of obstacles. They are more so for getting a general sense of where obstacles are so they can be avoided
Sample Radar Sensors
The sample sensors below are equipped with a CAN bus interface.