The invention provides a PSD-based
robot arm leveling and locating
system comprising a high-precision automatic leveling line
laser, a high-precision PSD module and a circuit module. A
laser ray serves as the datum line of the PSD-based
robot arm leveling and locating
system provided by the invention, then the PSD-based
robot arm leveling and locating
system is matched with three PSD units to be used, PSDs can read the position coordinates of light spots formed by crossing of the
ray and the PSDs through the circuit module, the accurate deflection direction and angle of a robot arm can be judged according to the coordinate values on the three PSDs, and 10-m precision can be smaller than 0.1 mm. A
signal communication circuit is arranged and adopts RS485 communication, the speed can reach 100 hz or above, the
signal transmission speed is increased greatly, thus the leveling and locating speed of the PSD-based robot arm leveling and locating system is further promoted, modulation light is adopted for a
light source from the high-precision automatic leveling line
laser, interference of external
background light is avoided effectively, and then overall precision of the PSD-based robotarm leveling and locating system is improved.