US 11,988,614 B2
Cylindrical inner face inspection device
Takashi Oura, Tokyo (JP)
Assigned to Online Business Solution. Inc, Tokyo (JP)
Appl. No. 17/607,142
Filed by Online Business Solution. Inc, Tokyo (JP)
PCT Filed May 11, 2020, PCT No. PCT/JP2020/018788
§ 371(c)(1), (2) Date Oct. 28, 2021,
PCT Pub. No. WO2021/117265, PCT Pub. Date Jun. 17, 2021.
Claims priority of application No. 2019-225680 (JP), filed on Dec. 13, 2019.
Prior Publication US 2022/0349835 A1, Nov. 3, 2022
Int. Cl. G01N 21/954 (2006.01)
CPC G01N 21/954 (2013.01) [G01N 2021/9546 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A cylindrical inner face inspection device, comprising:
a laser light emission device configured to generate a laser beam for irradiation at an inner face of a cylindrical inspection target;
an inspection probe including:
a pipe-shaped member formed from a transparent material, the pipe-shaped member being configured to transmit the laser beam from the laser light emission device as irradiation light through a hollow region,
a cylindrical exterior member configured to internally accommodate the pipe-shaped member, and
a reflective member provided at a leading end part of the exterior member,
the irradiation light being irradiated onto the inner face of the inspection target by the irradiation light being transmitted through the hollow region of the pipe-shaped member to the leading end part and by being reflected by the reflective member provided at the leading end part, and reflected light reflected from the inner face of the inspection target being reflected by the reflective member and transmitted through a region other than the hollow region of the pipe-shaped member;
a rotation device configured to rotate the inspection probe;
a photoelectric conversion unit configured to convert the reflected light, which has been emitted from an end face of the pipe-shaped member at an opposite end from the leading end part of the inspection probe, into an electrical signal; and
a movement device configured to move a main body part comprising the laser light emission device, the inspection probe, the rotation device and the photoelectric conversion unit.