| 摘要 |
PURPOSE:To measure the length of a long material rapidly with a high precision, by adding a mark for every length of the staff while moving the object to be measured along the staff. CONSTITUTION:Objects 2 and 2' to be measured and staff 1 of length L equipped with the mark with sensor at the front end are moved in parallel relatively. Simultaneously with the arrival of leading edges of objects 2 and 2' at the position of front first sensor S1, a counting mark is added to objects 2 and 2' in the position of back second sensor S2. After that, the operation where the mark is added in the position of the second sensor S2 simultaneously with the arrival of the preceding- stage mark part at the position of the first sensor S1 is repeated, and the total number of added marks is calculated. Further, the rest length from the last mark part to the back end part is detected to obtain the overall length of objects 2 and 2'. |
