| 摘要 |
PURPOSE:To provide a titled device which enables the automatic decision of the adequateness of the number of welding points, by the constitution wherein the traces of the spot welding on the cylindrical work rotating around the axis are detected with a photodetecting means and the detected number of the traces of welding with respect to the prescribed number of revolutions is compared with a set value. CONSTITUTION:The cylindrical work W which is completed of spot welding is installed on a rotary table 6, and is driven by a motor 5 so as to rotate around the axis. On the other hand, the light reflected from the work W is measured with an illuminating apparatus 8 and an industrial television camera 7. The signal from the camera 7 as the photodetecting means is outputted as an analog signal for brightness, and is converted to a digital signal with a binary encoding circuit 9. The digital signal is compared with the data stored in a video RAM 10 whereby the number of the traces T of spot welding are detected. The number of the traces T is counted with a counter 11 and said number and the prescribed number of revolutions of the work W detected with a counter 12 are compared with a set value in a comparator 13, by which the adequateness is decided and the result is displayed on a display 14. |
