Patent ID: 7528774

Claim:
An azimuth measurement apparatus comprising: a positioning signal receiver which receives a first impulse positioning signal and a second impulse positioning signal from a first fixed position and a second fixed position, respectively; a phase difference detector which detects a phase difference between the first impulse positioning signal and the second impulse positioning signal; and an azimuth calculator which measures an azimuth between a reference plane and an object of positioning, based on the first impulse positioning signal, the second impulse positioning signal, and the detected phase difference, wherein the phase difference detector comprises: a positioning signal phase detection unit which receives the first impulse positioning signal and the second impulse positioning signal and outputs a pulse signal with respect to the phase difference of the two positioning signals; a pulse-voltage conversion unit which converts the pulse signal into a voltage signal; and an analogue-digital (A/D) conversion unit which digitizes and outputs the voltage signal to the azimuth calculator.