US 11,815,596 B2
Object detection device
Ippei Sugae, Kariya (JP)
Assigned to AISIN CORPORATION, Kariya (JP)
Filed by AISIN CORPORATION, Kariya (JP)
Filed on Apr. 7, 2022, as Appl. No. 17/715,122.
Application 17/715,122 is a continuation of application No. 16/905,189, filed on Jun. 18, 2020, granted, now 11,327,173.
Claims priority of application No. 2019-115727 (JP), filed on Jun. 21, 2019.
Prior Publication US 2022/0229176 A1, Jul. 21, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G01S 15/04 (2006.01); G01S 7/527 (2006.01); G01S 15/931 (2020.01)
CPC G01S 15/04 (2013.01) [G01S 7/5273 (2013.01); G01S 15/931 (2013.01); G01S 2015/938 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An object detection device comprising:
a transmission unit that transmits a first transmission wave;
a reception unit that receives a first reception wave as the first transmission wave that is reflected by and returned from an object;
a signal processing unit that samples a first processing target signal according to the first reception wave and acquires a difference signal based on a difference between a value of the first processing target signal for at least one sample according to the first reception wave received at a certain detection timing, and an average value of values of the first processing target signal for a plurality of samples according to the first reception wave received in at least one of a first period and a second period of a predetermined time length that exist before and after the detection timing;
a threshold setting unit that determines a variation in the values of the first processing target signal in the plurality of samples, and sets a threshold which is a comparison target with the value of the difference signal, the threshold being set based on the variation in the values of the first processing target signal for the plurality of samples; and a detection unit that detects information about the object at the detection timing based on a comparison result between the value of the difference signal and the threshold,
wherein
the transmission unit transmits a second transmission wave before transmitting the first transmission wave,
the reception unit receives a second reception wave as the second transmission wave reflected by and returned from a road surface as the object before receiving the first reception wave,
the object detection device further comprises a setting value acquisition unit that acquires a setting value based on information about a second processing target signal according to the second reception wave, and
the signal processing unit acquires the difference signal based on a difference between the value of the first processing target signal for the at least one sample according to the first reception wave received at the detection timing and a larger one of the average value of the values of the first processing target signal for the plurality of samples according to the first reception wave received in at least one of the first period and the second period and the setting value.