US 12,442,922 B2
Optical measurement device and optical measurement method
Yosuke Kajii, Ayabe (JP); and Tomonori Kondo, Kyoto (JP)
Assigned to OMRON Corporation, Kyoto (JP)
Appl. No. 17/415,738
Filed by OMRON Corporation, Kyoto (JP)
PCT Filed Dec. 26, 2019, PCT No. PCT/JP2019/051050
§ 371(c)(1), (2) Date Jun. 18, 2021,
PCT Pub. No. WO2020/145172, PCT Pub. Date Jul. 16, 2020.
Claims priority of application No. 2019-003677 (JP), filed on Jan. 11, 2019; and application No. 2019-170426 (JP), filed on Sep. 19, 2019.
Prior Publication US 2022/0066033 A1, Mar. 3, 2022
Int. Cl. G01S 17/10 (2020.01); G01S 7/4863 (2020.01); G01S 7/487 (2006.01)
CPC G01S 17/10 (2013.01) [G01S 7/4863 (2013.01); G01S 7/4873 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An optical measurement device that acquires a measured value based on a received light amount of reflected light reflected by a target, the optical measurement device comprising:
a setting part that sets a threshold value for a received light amount per unit time of the reflected light based on feature information regarding a light amount of the optical measurement device, the feature information comprising a relative coefficient of the optical measurement device with respect to a reference value;
a determination part that determines presence or absence of noise in the measured value based on the threshold value;
a controller that comprises a light source for emitting light; and
a sensor head that comprises an optical system for condensing the reflected light,
wherein the setting part sets the threshold value based on first feature information regarding a light amount of the controller and second feature information regarding a light amount of the sensor head, the first feature information comprises a controller relative coefficient with respect to the received light amount per unit time of the reflected light and the reference value, and the second feature information comprises a sensor head relative coefficient with respect to the received light amount per unit time of the reflected light and the reference value,
wherein the controller further comprises a first storage part for storing the first feature information, and
the sensor head further comprises a second storage part for storing the second feature information.