关键词: 水听器阵列, 数据采集, 精确同步, 温补压控晶振

Abstract: The paper proposed a precise full-array-synchronization data acquisition clock generation and transmission method to handle the hydrophone's data acquisition synchronization problem in the ocean underwater acoustic detection. By using the independent high-precision clock source and asynchronous differential transmission lines, the long distance synchronous acquisition of the hydro-phone's array was realized, which was characterized with high anti-jamming capability and so on. The detailed model of the full-array-synchronization principle was analyzed and the prototype system was established. Circuits experiment was carried out to verify the feasibility of the entire system. Recovered clock's time delay in the acquisition node was less than 165ns when the low-speed synchronous clock signal was transmitted by the unshielded twisted pair of 18 meters length. The experimental results show that the proposed method has good effect when being applied to transfer the standard clock of data acquisition in the linear array.

Key words: hydrophone's array, data acquisition, precise synchronization, Voltage Controlled Temperature Compensated Crystal Oscillator (VCTCXO