Laser machine control is an electronic system for automatic operation of land scrapers or excavators.
The transmitter may use infrared or red laser but for safety measure all manufacturers limits the power to 5 milliwatts.
The transmitter corrects its position to get perfect horizontal plane with acceleration sensor/ gyro sensors / bubble based level sensor and a microprocessor based servo mechanism.
the receiver reads the height with the sensors and convert to a usable analog or digital signal and sends to the machine control unit.
It adjusts the height of the scraper by activating or deactivating the electro-hydraulic actuators (solenoid valves).