US 11,982,742 B2
Non-linear reception filter for an object recognition sensor for vehicles, in particular, ultrasonic sensor
Udo Sieber, Bietigheim (DE); and Ulrich Bauer, Markgroeningen (DE)
Assigned to ROBERT BOSCH GMBH, Stuttgart (DE)
Appl. No. 17/278,508
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Nov. 6, 2019, PCT No. PCT/EP2019/080355
§ 371(c)(1), (2) Date Mar. 22, 2021,
PCT Pub. No. WO2020/126195, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 102018222320.3 (DE), filed on Dec. 19, 2018.
Prior Publication US 2022/0035030 A1, Feb. 3, 2022
Int. Cl. G01S 15/931 (2020.01); G01S 7/292 (2006.01); G01S 7/521 (2006.01)
CPC G01S 15/931 (2013.01) [G01S 7/2926 (2013.01); G01S 7/521 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An object recognition device for a vehicle, comprising:
at least one ultrasonic sensor;
an averaging unit;
a filter device; and
an analysis device,
wherein signals from an object to be recognized are detectable by the sensor, the detected signals being filterable by the filter device, and then being feedable to the analysis device, and the analysis device being configured to recognize the object by an analysis of the fed filtered signals;
wherein:
the averaging unit averages a profile of amplitudes of the detected signals,
the filter device includes a non-linear filter unit, which is provided based on a linear low-pass filter with a variable time constant and is configured to filter the detected signals,
a value profile corresponding to a difference between the averaged amplitude profile and the filtered signals being feedable to the analysis device for analyzing and recognizing the object, and
the variable time constant being establishable based on a difference between the filtered signals and the detected signals and based on the averaged amplitude profile.