图像采集系统在红外时间延迟积分（Time Delay Integration，TDI）相机开发前期的验证与测试阶段发挥重要作用。介绍了一套以PXI 硬件平台和LabVIEW 软件平台为基础开发的图像采集系统。该系统采用模块化、多线程设计，具有高速数据采集和处理的能力。实验结果表明，系统最高达到约120Mbps 的数据采集率，可完成8 级TDI 图像的高速实时处理与显示。该系统实现了对新型640×8中波红外数字式TDI 探测器的数据获取，对新型探测器的应用有重要的技术支撑作用。

Image acquisition system plays an important role in the validation and testing phase of the early development stage of infrared Time Delay Integration (TDI) cameras. An image acquisition system based on PXI hardware platform and LabVIEW software platform is introduced in this paper. The system, adopting multi-thread and modular design, has the capability of high speed data acquisition and data processing. Experiments show that the system can achieve a data acquisition rate up to 120Mbps, and can process and display 8-stage TDI images in real time. The system has achieved the data acquisition of a new 640×8 digital MWIR TDI detector, which provides important technical support for application of the new detectors.