To provide an inspection device for accurately inspecting the number and positions of spot weld parts formed on a workpiece.
The inspection device 10 for inspecting the weld parts 12 comprises a laser sensor 22 provided on a robot arm 21, a control part 23 for moving the laser sensor 22 along the surface of the workpiece 11, a determination part 24, and a display device 25 and the like. The determination part 24 irradiates a laser beam toward the surface 11a of the workpiece from the laser sensor 22 while moving the laser sensor 22 to the workpiece 11 at a constant speed, and detects a distance from the laser sensor 22 to the workpiece 11 on the basis of the reflection light. The determination part finds a change amount of the distance from the laser sensor 22 to the workpiece 11 by differentiating the detected waveform. When a threshold exceeds the change amount, the determination part determines that the spot weld part 12 exists on a part irradiated with the laser beam.
| JPH05293668A | 1993-11-09 | |||
| JPH02260076A | 1990-10-22 | |||
| JPH10216955A | 1998-08-18 |
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Sadao Muramatsu
Ryo Hashimoto
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