| 摘要 |
PURPOSE:To calculate a swing speed considering the intering angle of a swinging member and including no error by forming a light transmitter/receiver, the swinging member, an operating means, etc. CONSTITUTION:A light hole E is formed on a sensor unit 3 so as to be separated from a light hole B by a prescribed distance in the rectangular direction to the arraying direction of light holes A, B. An optical beam 3e to be the 3rd light flux which is approximately parallel with optical beams 3a, 3b to be the 1st and 2nd light flux is projected from the light hole E. A light transmitting/receiving circuit 5e having the same constitution as light transmitting/receiving circuits 5a-5d is formed, the 1st-3rd light emitting means for projecting the 1st-3rd light flux are constituted of light emitting elements 6a, 6b, 6e formed correspondingly to the light holes A, B, E of the unit 3 and a photodetecting means for detecting the reflected light of the light flux from the light emitting means are constituted of photodetecting elements 7a, 7b, 7e. Thus, the real swinging speed is calculated on the basis of outputs obtained from the light transmitting/receiving circuits 5a, 5b, 5e by an operating part 13 in which the distances BE, AB are previously set up. |
