https://github.com/jewbetcha/openlaunch/blob/be4a36a58096c2dc94ea8f8fa9affe5269eb4e6b/golf-launch-monitor-circuit-v2.svg#L1
Comments on Physical Setup (Top View):
The IPM-165 is a continuous wave, monostatic radar with singular transmit and receive elements. That means that it can only measure the radial velocity of objects in its field of view. Objects moving across the field of view, as it seems is diagrammed here, do not induce a Doppler shift in the radial direction of the radar, and thus will generate a Doppler signal out of the sensor at ~0Hz which corresponds to a velocity of 0m/s. Objects moving towards or away from the aperture induce measurable Doppler shifts at the radar sensor. You need the orientation of the radar to be in the plane of the direction of flight of the ball, with careful consideration of the beam pattern (see Issue #2).
This gives rise to a fundamental issue, in that the camera sensor and the radar sensor cannot be co-located, since they require a 90deg offset to collect their respective measurements.
https://github.com/jewbetcha/openlaunch/blob/be4a36a58096c2dc94ea8f8fa9affe5269eb4e6b/golf-launch-monitor-circuit-v2.svg#L1
Comments on Physical Setup (Top View):
The IPM-165 is a continuous wave, monostatic radar with singular transmit and receive elements. That means that it can only measure the radial velocity of objects in its field of view. Objects moving across the field of view, as it seems is diagrammed here, do not induce a Doppler shift in the radial direction of the radar, and thus will generate a Doppler signal out of the sensor at ~0Hz which corresponds to a velocity of 0m/s. Objects moving towards or away from the aperture induce measurable Doppler shifts at the radar sensor. You need the orientation of the radar to be in the plane of the direction of flight of the ball, with careful consideration of the beam pattern (see Issue #2).
This gives rise to a fundamental issue, in that the camera sensor and the radar sensor cannot be co-located, since they require a 90deg offset to collect their respective measurements.