| 摘要 |
PURPOSE:To speed up the detection of bend in all directions by forming two means each of which projects parallel light to through holes corresponding to the number of leads formed on one side of a guide at a fixed angle and finding out the number of times of absence of 'OR' between the outputs of photodetectors which may be obtained by transmitted light. CONSTITUTION:An IC having leads 21-214 passes on an IC guide 11 having two pairs of through holes 15-21, 15a-21a so that light beams irradiated from illumination light sources 13, 13a are interrupted from passing the through holes 15-21, 15a-21a respectively and making incident on photodetectors 22-28, 22a-28a. The outputs of the converters 22-28 and that of the converters 22a-28a are inputted to independent OR circuits respectively and the number of times of repeats from the interruption of light to '0' of the OR circuits is counted by a counter. When the counter counts '2' for the frequency turning each OR circuit to '0' and '4' in total, the leads are decided as normal, and in other cases, decides as abnormal. |
