US 11,874,398 B2
Movement amount detection system, movement amount detection method and non-transitory computer readable medium
Hidenori Yabushita, Seto (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by Toyota Jidosha Kabushiki Kaisha, Toyota (JP)
Filed on Feb. 8, 2021, as Appl. No. 17/169,693.
Claims priority of application No. 2020-021313 (JP), filed on Feb. 12, 2020.
Prior Publication US 2021/0247491 A1, Aug. 12, 2021
Int. Cl. G01S 7/48 (2006.01); G01S 17/931 (2020.01)
CPC G01S 7/4808 (2013.01) [G01S 17/931 (2020.01)] 8 Claims
OG exemplary drawing
 
1. A movement amount detection system comprising:
a plurality of optical sensors disposed in a moving body, each of the plurality of optical sensors being configured to acquire image data of a floor surface, the number of the plurality of optical sensors being at least three;
a movement amount acquisition unit configured to acquire, by using the image data acquired by the optical sensors, a movement amount of the moving body at each of a plurality of places where a respective one of the plurality of optical sensors is disposed; and
an arithmetic processing unit configured to calculate the movement amount of the moving body at a reference point located thereon by using the movement amount of the moving body at each of the plurality of places where a respective one of the plurality of optical sensors is disposed, acquired by the movement amount acquisition unit, wherein
the arithmetic processing unit calculates a second movement amount at the reference point by using first movement amounts, each of which is detected based on image data acquired by a respective one of the plurality of optical sensors, and inversely calculates a third movement amount at each of the plurality of places where a respective one of the plurality of optical sensors is disposed from the second movement amount, and
the arithmetic processing unit determines, among the plurality of optical sensors, an optical sensor that should be excluded in the calculation of the movement amount at the reference point of the moving body based on a difference between the first movement amounts and the third movement amount at each of the plurality of optical sensors.