大动态范围宽带模拟声源的干端设计

发布时间：2018-01-09 15:16

本文关键词：大动态范围宽带模拟声源的干端设计　出处：《哈尔滨工程大学》2012年硕士论文　论文类型：学位论文

更多相关文章： ARM FPGA 模拟声源 Linux Qt designer

【摘要】：大动态范围宽带模拟声源，用于系统设备在进行湖试、海试试验时模拟真实目标发出水声信号，完成水声测量系统的验证工作。本论文分别从模拟声源的硬件设计、底层通信驱动程序设计和控制界面软件设计进行阐述。从系统需求的角度制定了模拟声源的设计指标，给出了由ARM和FPGA作为核心处理器的驱动信号发生器设计方案。硬件设计部分，论文介绍了核心器件的选型、设计电源管理系统、设计驱动信号发生器以及相关接口。D/A的动态范围不足，在发送小信号的时候使用衰减器来弥补这一不足。功放部分选择使用线性功率放大器，串联一个电感和换能器进行宽带匹配达到预期目的。软件设计部分选用嵌入式Linux操作系统的Red Hat作为平台，搭建嵌入式开发环境，建立网络共享文件，，可以在目标板上访问远端PC机上的文件和应用程序。编写字符设备驱动程序，完成ARM和FPGA之间的底层通信，并使用动态加载和静态固化两种方法移植设备驱动程序。使用触摸屏LCD极大简便了模拟声源的操作过程，控制软件设计选用具有高效率的信号与槽通信机制特性的Qtopia。由系统需求功能出发使用Qt disigner提供的控件设计控制界面，并详细阐述了信号的生成和传输以及应用程序的编译和固化过程。此模拟声源通过了水池测试和湖上测试，工作稳定，能够满足大动态范围和宽带的要求。
[Abstract]:A wide-band analog sound source with large dynamic range is used to simulate underwater acoustic signals from real targets in lake test and sea test. In this paper, the hardware design of the analog sound source, the design of the communication driver and the software design of the control interface are described. From the point of view of system requirement, the design index of analog sound source is worked out, and the design scheme of driving signal generator with ARM and FPGA as the core processor is given. This paper introduces the selection of core devices, the design of power management system, the design of driving signal generator and the dynamic range of related interface. The attenuator is used to make up for this deficiency when transmitting small signal. The power amplifier chooses to use a linear power amplifier in series with a inductor and a transducer to match the wideband to achieve the desired purpose. In the part of software design, Red Hat of embedded Linux operating system is selected as the platform to set up embedded development environment and establish network shared files. Can access the remote PC files and applications on the target board. Write the character device driver to complete the bottom communication between ARM and FPGA. Dynamic loading and static solidification are used to transplant the device driver. The operation process of simulating sound source is greatly simplified by using touch screen LCD. Qtopia, which has high efficiency communication mechanism between signal and slot, is used in the control software design. The control interface provided by QT disigner is designed according to the system requirement function. The generation and transmission of the signal and the process of compiling and solidifying the application program are described in detail. The simulated sound source has passed the tank test and the lake test, and the work is stable, which can meet the requirements of large dynamic range and wide band.
【学位授予单位】：哈尔滨工程大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP368.1;TN791

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