基于DSP的参数在线配置滤波器

发布时间：2019-03-18 20:13

【摘要】：数字滤波器在工业中应用广泛,需求量巨大,但不同的工业现场往往对滤波器的性能参数要求不尽相同,而现有的数字滤波器多数存在参数不便改写的问题。为此,本文以TMS320F28335处理器为基础,提出了一种基于DSP的参数在线配置滤波器。本文设计的基于DSP的参数在线配置滤波器系统,集A/D数据采集、DSP数字滤波、D/A波形恢复于一体,并结合上位机用户界面,可实现非接触式的滤波参数在线配置功能。该系统由上位机和下位机两部分组成,基于Lab VIEW图形化语言编写的上位机软件主要负责配置并显示滤波阶数,滤波系数以及采样频率等滤波器性能参数,下位机由以TMS320F28335为核心芯片的DSP处理器和C8051F340单片机两部分组成,主要负责数据存储、传输以及对数字信号的实时滤波处理。上位机和C8051F340单片机通过无线Wi Fi通信,完成滤波参数的在线配置及传送过程,而单片机需将从上位机接收到的滤波参数通过SPI方式发送给DSP,最后DSP进行数字滤波。实际测试表明,本文设计的上位机与下位机能够协调配合,实现滤波参数的非接触式在线配置功能,达到了设计要求。首先,本文介绍了该滤波器系统的研究意义及设计方案,其次,完成了系统的原理图及PCB板设计,并对PCB板进行焊接,最终完成系统的硬件平台设计。文中使用C语言对系统应用功能进行代码编写,并结合软硬件设计对系统功能进行测试和验证。测试结果表明,本文设计的基于DSP的参数在线配置滤波器系统合理可行。
[Abstract]:Digital filters are widely used in industry and require a great deal of demand. However, different industrial sites often require different performance parameters of filters. However, most of the existing digital filters have the problem of inconvenient rewriting of parameters. In this paper, based on TMS320F28335 processor, a parameter on-line configuration filter based on DSP is proposed. The parameter on-line configuration filter system based on DSP is designed in this paper. It can realize the on-line configuration function of non-contact filter parameters by integrating the data acquisition, DSP digital filtering and Dana waveform recovery in one, and combining with the user interface of the host computer to realize the function of on-line configuration of the non-contact filter parameters. This system is composed of upper computer and lower computer. The upper computer software based on Lab VIEW graphic language is mainly responsible for configuring and displaying filter performance parameters, such as filter order, filter coefficient and sampling frequency, etc. The lower computer is composed of a DSP processor with TMS320F28335 as its core chip and a C8051F340 single chip microcomputer, which is mainly responsible for data storage, transmission and real-time filtering of digital signals. The host computer and the C8051F340 MCU communicate through the wireless Wi Fi to complete the on-line configuration and transmission process of the filter parameters, and the MCU needs to send the filter parameters received from the host computer to the DSP, final DSP through the SPI mode to carry out the digital filtering. The practical test shows that the upper computer and the lower computer can coordinate with each other to realize the contactless online configuration of filter parameters, which meets the design requirements. Firstly, this paper introduces the research significance and design scheme of the filter system. Secondly, it completes the schematic diagram of the system and the PCB board design, and welds the PCB board, finally completes the hardware platform design of the system. In this paper, the C language is used to code the application function of the system, and the system function is tested and verified by the software and hardware design. The test results show that the parameter on-line configuration filter system based on DSP is reasonable and feasible.
【学位授予单位】：西安工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN713

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