| 摘要 |
<p>The method involves comparing the movement of a part subjected to a set of forces with that of a perfect part subjected to the same set. It comprises a transparent support (15) on which the part (21) rests freely. The support (15) is fixed to a light emitter (1) and to a detector (13) by means of jacks (5 and 18) and is set in vibration by the electromagnet (9). The signals obtained are compared with the signals obtained for a perfect part. The invention is used especially for monitoring drug pills, lead shot, clothes buttons, balls for bearings, etc. <IMAGE></p> |
