| 摘要 |
<p>A position detection method featuring improved detection precision for a laser sensor that uses CCD as a light-receiving element in the laser sensor, and a device therefor. The sum of products of cell outputs (Ci) and cell positions (Xi) of light-receiving elements (14) is found (42), and the cell outputs are added up (46). A counter (45) is reset when the cell output becomes greater than a preset threshold value, and sample-holding signals (SH) are counted when it becomes smaller than the preset threshold value. The sum of products is divided by an added value through a division circuit (47), and the barycentric position the sum of products is found as a light-receiving position and is stored in the latch buffer. When two or more light-receiving positions are found, the controller finds a position by the primary light of reflection and finds the position of the object. The position is not detected by the CCD cell unit, but the light-receiving position among the CCDs is detected, contributing to improving precision of position detection.</p> |
