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    • 8. 发明专利
    • INSPECTION DEVICE WITH LINEAR CAMERA
    • JPH04290951A
    • 1992-10-15
    • JP5427691
    • 1991-03-19
    • NEC CORPYAMAMOTO NORITEN CO LTD
    • MASUDA KOICHIYAMAMOTO KEIZO
    • G01B11/00G01N21/88
    • PURPOSE:To allow a linear camera to make accurate self-start and self-stop for taking-in the inspection data for an object to be inspected. CONSTITUTION:When an object to be inspected 5 comes in the visual field of a linear CCD camera 1, the total amount of light incident to the camera 1 varies, and it is sensed that the light amount calculated by a camera data summarizing circuit 2 becomes greater than the min. light amount preset by a total light amount comparing circuit 3, which gives a start signal to a camera data takein circuit 4. This circuit 4 begins taking in the camera data given via the camera 1. A stop signal is given to the camera data takein circuit 4 if it is sensed that the light amount calculated by the camera data summarizing circuit 2 becomes the min. light amount preset by the total light amount comparing circuit 3 at the moment the object 5 goes out of the view field of the camera 1. Consequently the camera data takein circuit 4 interrupts the taking-in of the camera data for the object 5 given via the camera 1.