Distance measurement appts. using light pulses - involves transmitter emitting light pulses towards measurement object, and receiver detecting reflected light

摘要

The receiver signal processing unit comprises an analogue/digital convertor for digitalising the receiver signals and signal processing electronics which prosses the signals from the measurements by means of average value formation or other noise-reducing algorithm to obtain a distance value out of a noise signal. The transmitter comprises a laser diode with a lens, and the receiver consists of a band pass filter, a lens, a picture field mixer, and a detector. The transmitter and receiver optics are formed with common a focal consisting of a main lens, a picture turning prism with radiation divider and mirrors. The signal processing electronics comprise digital calculation circuits which accumulates measurment values from a large number of measurements.