关键字 :数据采集、FPGA、高速A/D转换
Abstract
With the development of science and technology, more and more in the nature is being discovered by the people thus the demand for a better way of data acquisition is increasing. And the technology of data acquisition is being development continually, it become faster, higher in resolution, and much wider in input range. In the same time data acquisition system is in the front of any other systems in the whole signal processing system .It’s the most difficult and chief problem that how to acquire the data in real time and accurately. And if there is a problem in acquiring the data, the system behind it will be difficult to process an accurate decision and a corresponding react. So it’s the most important part in the whole designed system. However, it’s difficult for the traditional data acquisition system to fulfill the task of the present.
This article describes a solution to the high speed data acquisition system based on FPGA .There are 8 channels for the analog signal inputs in the system. And what’s more, the range of input is changeable. It combines some analog input handlings and a high speed A/D converter whose sampling frequency can be reach to 1 MHz to achieve a high speed, high resolution sampling with a very wide input range. The FPGA module is the control center of the whole system, with responsibility for sending the commands that control the other module in the system. According to it, the system can be controlled by the supervisory computer easily in changing the acquisition channels and the input range and so on.
Keywords: data acquisition, FPGA, high speed A/D conversion
