| 摘要 |
PURPOSE:To detect unevenness of coated paint positively and integrating the detector in a manufacturing line for automation, by installing an image sensor for developing the image of an article, A/D sensor circuit memory, and calculating means. CONSTITUTION:A beam of light is projected on to an article coated with paint on its surface, an image of the article is picked up by an image sensor. Next, an image signal issued out from the image sensor is converted to a digital signal per each bit by an A/D conversion circuit 24. And, the digital signal fed out of the circuit 24 is stored consecutively in a shift registor 38. For example, if data for 10 bits are stored in the shift registor 38, a difference of data stored by an adder 74 in a position by 2 bits beforehand, adder 75 in a position by 5 bits beforehand, and adder 76 in a position by 8 bits beforehand and the data stored at this time is obtained and this difference is compared with the upper limit standard value by comparators 86, 87, 88 respectively. And, when any value of difference exceeds the upper limit value, gates of the corresponding AND gates 90-92 are opened and a paint coat unevenness detection signal FS is fed out through an SSR (Solid State Relay) 96. |
