US 12,459,796 B2
Industrial vehicle distance and range measurement device calibration
Karan Purohit, Auckland (NZ); Timothy Fanselow, Auckland (NZ); and Sebastian Theos, Vaterstetten (DE)
Assigned to Crown Equipment Corporation, New Bremen, OH (US)
Filed by Crown Equipment Corporation, New Bremen, OH (US)
Filed on Jul. 8, 2021, as Appl. No. 17/305,482.
Claims priority of provisional application 63/049,171, filed on Jul. 8, 2020.
Prior Publication US 2022/0009759 A1, Jan. 13, 2022
Int. Cl. B66F 9/075 (2006.01); B66F 9/06 (2006.01); G01S 7/497 (2006.01); G01S 17/42 (2006.01)
CPC B66F 9/0755 (2013.01) [B66F 9/063 (2013.01); G01S 7/497 (2013.01); G01S 17/42 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A process for calibrating a distance and range measurement device coupled to an industrial vehicle, the process comprising:
determining a nominal detection zone that ends above ground at a zone height, wherein the nominal detection zone is a detection zone when the distance and range measurement device is properly calibrated;
determining a device height of the distance and range measurement device above the ground;
taking a measurement of an emission from the distance and range measurement device at a pitch angle;
reshaping the nominal detection zone to create a modified detection zone based on the zone height, the device height, and the measurement; and
using the modified detection zone to detect objects of interest to the industrial vehicle, wherein when an object is detected below the zone height, the object is ignored.