| 摘要 |
PURPOSE:To obtain a distance measuring sensor, which is mounted on an unmanned conveying robot and can measure the distance accurately regardless of the reflecting characteristics of a body to be measured, by using laser beams. CONSTITUTION:A laser beam is projected from a laser device 1 through a rotary mirror 3 and rotated at an equal angle speed omega. When the spots of the laser beams are projected on positions C and D on a floor 2, the spots are received by light receiving devices 4 and 6 through a condenser lens 5. A counter 8 counts clock pulses CLK based on the output pulses from the light receiving device 4. The counter 8 become inoperative by the output pulse signal from the light receiving device 6. A latch circuit 9 latches the counted value of the counter 8, and outputs the value to an operating circuit 10. The counted value indicates a time (t) from the time point when the light receiving device 4 receives the spot to the time point when the light receiving device 6 receives the spot. When a body 12 is located at a position E, the light receiving device 6 receives the spot of a position F. By measuring the time (t), the distance (l) of the body 12 can be obtained by the expression in the Figure. |
