【作者】 潘国栋；

【导师】 赵春晖；

【作者基本信息】 哈尔滨工程大学 ， 通信与信息系统， 2002， 硕士

【摘要】 水声数据采集装置对于水声试验来说是不可缺少的，由于水底的自然环境极其复杂，这就要求我们所采用的数据采集器能够适应水下恶劣的自然环境，因此所采用的数据采集器应具有较大的动态范围，所采集信号的幅度范围要尽可能的宽。从节约成本的角度考虑，又要求所采用的系统应该具有一定的通用性以及灵活的扩展能力。本论文所要完成的工作正是基于这一目的而展开的，主要的工作摘要如下： 1．在模拟电路部分，采用可编程滤波器MAX262，这样就满足了该数据采集装置所采集的信号的频率范围较宽以及具有较低的噪声水平的要求，为了使采样到的信号的幅度满足后面A／D转换器的要求，采用MAX551对采样到的信号进行调理(增益控制)。 2．该系统将来需要走出实验室到实际的试验现场去采集数据，如果不能脱离主机，那么使用起来就很不方便，因此，要求我们必须使其能够脱机工作。该系统中所使用的液晶显示屏正是作为人机交互的界面，用户通过键盘就可以设置参数并能实时显示参数，使用起来非常方便。 3．为了将来的扩展，本系统中采用了TI公司的TMS320VC5402 DSP芯片和Altera公司的大规模可编程逻辑器件EPF10K50E芯片作为整个系统的核心器件，由于二者都是可编程的，这就为将来的升级提供了便利的条件。 4．为了增加传送大量数据的灵活性，本系统中采用了光纤接口、USB2.0接口以及IDE硬盘接口，这就为调试以及实际应用时提供了比较多的选择机会，增加了本系统的实用性。更多还原

【Abstract】 Underwater acoustic data acquisition equipment is necessary for underwater acoustic experimentation. Since the situation underwater is very complicated, we must adopt the data acquisition equipment which is adaptive to the abominable field underwater. All of these make us to make the data acquisition equipment to has a wide dynamic range and have the utility to acquire the signals which have large amplitude range. To reduce the cost necessary for the research on it , we must make the system to has unversial purposes and flexiable extending ablitity. All of these requests are the kernal of the paper. The work finished in this paper is as follows:1. In designing analogic circuit, we adopt programmable filter MAX262 to meet the system’s command. After the step, we can make the signal’s frequency width is wider and noise level is lower. To make the signal’s amplitude to meet the analogic to digital device’s command, we adopt the MAX551 to finish the gain control.2. Because the data acquisition equipment researched in laboratory must be taken out to the field to acquire the experiment data, we must make it to work independently. If we can’t make it, the application of the equipment will be very troublesome. The liquid crystal module introduced to the data acquisition equipment solves the task perfectly.3. In order to extend the use range of the system equipment in the future, we introduced the TMS320VC5402 DSP 1C (Integrated Circuit chip) produced by TI corporation and PLD (Programmable Logic Device) produced by Altera corporation. It is very convinent to upgrade the system because these integrated circuit chips adopted in it can be programmed on them.4. To increase the flexibility when transferring large qualities of data, We use optical fibric interface and USB2.0 interface and IDE harddisk interface to solve the task perfectly. All of these measures above increase the flexibility and applicability of the system equipment largely.更多还原