Design of the automatic acquisition system based on GPS

In the communication system especially the free-space optical communication, the pointing direction adjustment system is strongly required because of the strongly transmission directionality of communication signals. Based on the GPS technology, the automatic acquisition system, with the control core of TMS320F2812, is established, and the horizontal and elevate reference angle are separately detected by magnetic field sensors KMZ51 and 3-axis acceleration sensor ADXL345. The acquisition principle for GPS and software flow chart is discussed in this paper. Finally, the experiment proved that this acquisition system could finish preconcerted function, and if it is equipped with wireless transmission, the system can be directly applied in the initial acquisition for free-space optical communication.