文档介绍：摘要
多路同步数据采集技术在自动控制电气测量地质物探航空航天等工程实践
中有着极为广泛的应用如何快速的完成多路输入信号的同步采集并对采样数据进行
快速处理以满足工业现场的控制要求一直是数据采集技术研究的一个重要方向
本研究课题以TI公司的浮点数数字信号处理器TMS320VC33和AD公司的14位高速同
步数据采样芯片AD7865作为控制和采样核心并采用锁相环作为同步控制为数据
的多通道高速同步采样和处理提供了一种有效的解决方法
文章在对有关应用背景进行分析的基础上并通过比较和论证提出了解决工业
控制中高速同步采样问题的一种途径并详细阐述了数据采集系统的软件构架和硬件
设计
文章以系统的多通道同步及高速高精度采样的实现展开研究阐述了多片模数转
换器AD7865与TMS320VC33的接口电路及对周期信号进行同步跟踪的锁相环电路的
设计并采用可编程逻辑器件(CPLD)来实现采集系统硬件模块的地址分配对系统的
UART接口 USB总线的扩展也加以了说明针对采集系统上的硬件资源对A/D同步
采样驱动 USB的固件编程等相应功能模块的软件设计做了详述
在本论文的研究基础上开发出了用于输电网电力参数测量的实物并被作为一个
的研制中负责处理无功补偿装置前端的
多路数据同步采集和数据处理等任务
关键词同步数据采集 DSP USB 固件无功补偿
I
Abstract
In some field, such as auto-control, electric measure, geophysical exploration, spaceflight
projects and so on, multi-channel synchronous data acquisition technology is used widely. In
order to meet industrial field control’s demand, how to synchronous sample multi-channel
input signals with high speed and quickly deal with sampling data is still one of important
directions in data acquisition technology study. This thesis introduces the research and
development of the multi-channel synchronous data acquisition system. Its control and
sampling’s core is based on TI’s floating-point Digital Signal Processor TMS320VC33 and
ADI’s 14_bit fast simultaneous sampling chip AD7865, the Phase Lock Loop(PLL) is adopted
as simultaneous sampling control circuit. This research offers an effective method in
multi-channel synchronous data’s acquisition and dealing with high speed.
On the basis of analysis about some relational applying background, the solution of
high-speed simultaneous sampling for industry control is put forward through reasoning
pare. At the same time, the software structure and hardware design are expounded.
In this paper, the research is based on the realization of synchronization and high
speed/precision sampling for the multi-channel input signals. The design of interface circuit
(between multiple AD7865s with TMS3