| This paper makes a detailed discussion on laser plane instrument, laser receiver array and the design of flat
shovel control unit of laser grader. Using DC motor to drive rotation of the pentagonal prism, laser plane and completing the
closed loop, DC motor is controlled by self-guiding grating and consequently the injection angle control of the laser plane
is achieved. The design a level sensor element based on ordinary blisters will effectively guarantee the horizontal precision.
Arrange a certain amount of silicon photocells as the laser receive arrays and then installs them on the force arm of the flat
blade as photoconductive unit. The poweramp uses the corresponding amplify shape and filter circuit to process the output
signal, the controller can obtain the current position and speed of the flat blade. The control algorithms of the flat blade
based on the receiver array can ensure the working accuracy of the laser grader. The results of the test show that the laser
plane horizontal error produced by the system is less than 25' and the leveling accuracy is less than 50 mm. |
