Application of ultrasonic binaural method for measurement of spatial coordinates

Abstract

For measurement of spatial coordinates of the mobile object combined method based on ultrasonic binaural approach and infrared remote triggering was proposed. The source of low-frequency ultrasonic waves is fixed to the mobile object and is triggered remotely by infrared optical waves. The ultrasonic signals are picked up by two ultrasonic receivers and position the ultrasonic source is determined by the binaural method. For improvement of accuracy and noise robustness the delay time of the ultrasonic signals is determined on-line using correlation processing. Algorithm for tracking of ultrasonic pulses in the time domain was developed. Analysis of the measurement uncertainties and results of experimental investigations are presented.