应用光学, 2014, 35 (5): 806, 网络出版: 2014-10-23  

多通道热释电IRFPA图像拼接采集系统

Pyroelectric IRFPA mosaic image acquisition system with multi channels
程瑶 *
作者单位
重庆理工大学 电子信息与自动化学院,重庆 400050
摘要
为了实现分辨率高的大规模热释电IRFPA探测器,设计了多路通道并行输出的读出电路。针对多路输出的热释电IRFPA探测器,依据热释电探测的时序要求,设计了图像拼接采集系统。利用外部驱动信号控制采集卡的触发及采样时钟,由斩波器同步信号判断热释电探测器的亮场及暗场信号。构造PC-DAQ虚拟仪器系统对多通道输出的热释电型IRFPA进行多路并行图像采集,并对每路图像信号进行亮、暗场判断后进行差分处理,通过软件拼接处理成一副完整的图像,最终在软件平台上显示。对实验室研制的160列×120行双通道读出及320列×120行四通道读出的热释电读出电路进行了图像采集实验,对于同样阵列大小的单通道读出探测器,双通道结构读出速度提高了1倍,四通道结构读出速度提高了3倍。通过采集成像实验验证了系统的可行性。
Abstract
In order to achieve large-scale pyroelectric infrared focal plane array (IRFPA) detector with high resolution, the readout circuit with multi-channel parallel output was designed. Based on the pyroelectric IRFPA detector of multiple-output and the pyroelectric detecting timing requirements, the system of mosaic imaging acquisition was designed. The external driving signals were used to control the trigger and sampling clock of acquisition card, and a chopper synchronizing signal was used to judge the bright field and dark field signal of the pyroelectric detector. The system was constructed with PC-DAQ virtual instrument system to acquire multi-channel parallel image, judge the bright and dark field for differential processing on each channel, and display a whole image after mosaic processing on software platform. The experimental image acquisition of the pyroelectric readout circuit with 160 × 120 two-channels readout and 320 × 120 four-channels readout were taken and the output signal waveform and image were showed after connecting the two-channels and four-channels signals. Compared with the single channel readout structure of the same scale detector, the readout speed of two channels structure doubles, and the four channels readout speed improves 3 times.

程瑶. 多通道热释电IRFPA图像拼接采集系统[J]. 应用光学, 2014, 35(5): 806. Cheng Yao. Pyroelectric IRFPA mosaic image acquisition system with multi channels[J]. Journal of Applied Optics, 2014, 35(5): 806.

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!