| 摘要 |
PURPOSE:To measure an angle to measure the distance to a picture by providing a pair of ITV cameras which are parallel with each other on both sides of a laser beam and are equally distant from the laser beam and are so supported that they are horizontally rotated synchronously with each other in opposite directions. CONSTITUTION:ITV cameras 20 and 21 pick up a laser spot 19 on screens 20a and 21a of themselves and are rotated synchronously with each other in the horizontal direction, namely, the direction of a laser beam 17. ITV cameras 20 and 21 are rotated synchronously with each other so that a laser spot 19' picked up on the screen 20a of one ITV camera 20 and a laser spot 19'' picked up on the screen 21a of the other ITV camera 21 coincide with centers 0 of respective screens 20a and 21a; and when they coincide with centers O, an angle theta between the laser light source 17 and the ITV camera 20 or 21 is measured to measure a length L to the wall surface in accordance with L=D/tantheta. This constitution is equipped in a running vehicle, and the length to the wall surface 18 is measured and the error is absorbed to run the running vehicle along a supposed route.
|
