Research and Application on Optic-electronic Ranging Technology for Close Quarters

Compared with the traditional contact ranging technology, the optic-electronic ranging technology has been widely used in the fields of automatic measurement and online monitoring because of its non-contacting mode, good accuracy, real-time and other prominent advantages. Aiming at the engineering requirements of the close quarters ranging, the paper designed an optic-electronic ranging system for close quarters based on PSD. With the improved vertical-incidence triangulation as measuring principle, the optical system was set up on the optical platform. And then the position signal detecting circuit and the data acquisition and processing circuit were designed. The data acquisition and processing circuit with the ARM microprocessor as its core used the own 12 bit high-speed A/D convert module of the chip to collect the data. The circuit realized the other functions such as the real-time display, the LED indication and the buzzer warning. The test results show that the measuring range of the system is 100 mm to 150 mm, and ranging accuracy could reach 1 mm. The system ultimately reached the preliminary design requirements.