摘要
本文详细地阐述了基于USB2.0的实时数据采集虚拟仪器系统的设计细节和研究成果。系统采用400MHz增益带宽积的运算放大器,运用DA高精度校准技术,并选用高采样率低噪声的12位AD转换芯片进行模拟电路和AD转换电路设计,保证了数据采集系统的信噪比,提高了系统测量精度。系统还采用预测编码和字典压缩等数据压缩技术,降低了系统数据传输量,并运用USB2.0高速数据串行传输接口技术,实现了数据串行高速传输,满足了高数据吞吐量要求。
The dissertation has given the designing details and the achivements in study, which includes general scheme, circuits, software and performance of real-time data acquisition system based USB2.0 technology. Firstly, the system has a good SNR and high accuracy, which is owed to wideband operational amplifier being used, accurate adjustment by DA, 12-bit high sampling AD converter being applied. Secondly, data transmission becomes less by using forecasting code technology and dictionary compress technology, which are run by DSP on board.Thirdly, the system can transfer data to PC at a high speed on the series interface based on USB2.0 technology, which is satisfied with the demand for a great many data transmission.
出处
《中国测试技术》
CAS
2005年第5期87-91,共5页
CHINA MEASUREMENT & TESTING TECHNOLOGY
基金
国家自然科学基金项目(437451)
