US 12,111,389 B2
Radar elevation angle validation
Jonathan C. Berry, San Jose, CA (US); and Duc H. Vu, Sunnyvale, CA (US)
Assigned to Argo AI, LLC, Pittsburgh, PA (US)
Filed by Argo AI, LLC, Pittsburgh, PA (US)
Filed on Sep. 21, 2020, as Appl. No. 17/027,501.
Prior Publication US 2022/0091254 A1, Mar. 24, 2022
Int. Cl. G01S 13/86 (2006.01); G01S 13/58 (2006.01); G01S 13/931 (2020.01)
CPC G01S 13/865 (2013.01) [G01S 13/58 (2013.01); G01S 13/931 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A device, the device comprising processing circuitry coupled to storage, the processing circuitry configured to:
transmit, from a radar, one or more signals towards a corner reflector situated in a direction of the radar;
receive, at the radar, reflected signals from the corner reflector;
measure signal energy of at least one of the reflected signals;
access a baseline dataset stored in a datastore, the baseline dataset comprising a plurality of radar elevation angles indexed in the datastore by different sets of signal energy values, corner reflector elevation values, and radar-to-reflector distances;
compare the measured signal energy to one or more of the plurality of signal energy values contained in the baseline dataset;
retrieve a radar elevation angle from the plurality of radar elevation angles contained in the baseline dataset that is associated with a signal energy value of the plurality of signal energy values matching to the measured signal energy;
compare the radar elevation angle retrieved from the baseline dataset to a validation threshold;
determine whether the radar is pitched upwards or downwards based on a deviation of the radar elevation angle of the baseline dataset from the validation threshold; and
determine a radar validation status based on the comparison;
wherein the baseline dataset correlates signal energy values with an average energy pattern based on measurements associated with a plurality of other radars.