一种新型低频声矢量场采集系统的设计与实现  

Design and realization of a new low-frequency vector acoustic field acquisition system

作　　者：邢传玺[1,2] 朴胜春[1,2] 刘振江[3] 张虎 

机构地区：[1]哈尔滨工程大学水声技术重点实验室,哈尔滨150001 [2]哈尔滨工程大学水声工程学院,哈尔滨150001 [3]山东科学院海洋仪器仪表研究所,青岛266001

出　　处：《仪器仪表学报》2013年第12期2800-2805,共6页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金重点项目(11234003);国家自然科学基金(11104045;51279033);国防科技重点实验室基金(9140C200103110C20)资助项目

摘　　要：针对低频声矢量场测量技术,设计和实现了一种声矢量场探测系统。其特点是将矢量水听器、信号采集设备、罗经与电源集成一体,传感器输出的模拟信号直接在其内部进行模数转换,避免了模拟信号由于长距离传输所造成的衰减和干扰,且易于布放回收。该系统可同步测量声场空间的声压和质点振速3个正交分量的数据,所得到的数据即可以采用自容式存储在系统内部TF卡中,亦可通过经优化设计的带宽3 MB/s的高速RS485总线实时传输。回收内部数据时可通过Mass storage协议利用预留USB接口来实现读取数据,无需开启罐体。该系统进行了实验室验证实验,并以潜标的形式进行了海上试验,对爆炸声信号进行了测量并对获得数据进行处理。结果表明,该系统工作可靠稳定,系统平均功率为350 mW,准确地获取了声矢量信号数据,可广泛应用于低频声矢量场探测领域。Aiming at the measurement techniques of the low frequency vector acoustic field, a vector acoustic field de- tection system was designed and realized. The vector hydrophone, signal acquisition equipment, magnetic compass and power supply are integrated in this system, the analog-to-digital conversion of the analog signal from the sensor is completed directly within the system, the attenuation and interference to the analog signal caused by long distance transmission are avoided, and the system is convenient for the deployment and reclamation. This system can synchro- nously measure the sound pressure in the acoustic field space and the three orthogonal components of particle veloci- ty;the measured data can be stored in the internal TF card with self-contained method and also can be transmitted through the RS485 bus with an optimized bandwidth of 3 MB/s in real time. When retrieving data, the internal data can be read through the pre-designed USB port with mass storage protocol rather than opening the equipment. The system was verified with laboratory test;ocean experiment was conducted in the form of submersible buoy, the explo- sion acoustic signal was measured and the obtained data were processed. The experiment results indicate that the sys- tem operates reliably and stably, the vector acoustic field data are acquired accurately;the average power of the sys- tem is 350 mW. The system can be widely applied in low frequency vector acoustic field detection.

关 键 词：声矢量场 数据采集 矢量水听器 潜标 

分 类 号：TB52[理学—物理]