长波红外干涉图像获取技术研究

发布时间：2018-02-24 21:08

  本文关键词： 非制冷探测器 干涉图像 单片机 FPGA　出处：《中北大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着红外成像光谱技术的快速发展，长波红外干涉图像获取技术的研究在现代军事、安防、医疗、科研、救灾等中有着越来越重要的应用，而且干涉图像获取技术的研究对于研制干涉成像光谱仪以及研究目标的光谱图像信息都有着十分重要的意义. 论文根据各种静态干涉具的特性，选用等效斜楔干涉具作为干涉图像获取系统的干涉元件，选用法国ULIS公司的UL04371型非制冷红外面阵探测器作为红外干涉图像的获取装置，首先对干涉图像获取的探测原理进行了分析，硬件驱动处理电路采用单片机和FPGA作为控制芯片，单片机STC89C52负责探测器可调偏置电压的控制和显示，FPGA负责探测器的驱动和数据处理，硬件驱动处理电路与移动部件探测器电路之间采用FFC排线连接，方便探测器位置的调整，FPGA与上位机LabVIEW之间采用USB2.0接口电路进行通信，LabVIEW上位机完成了USB传输数据的接收、处理及干涉图像的显示。 其次，完成了探测器的FPGA驱动控制程序、图像数据缓存程序、LabVIEW的图像数据接收与显示程序，以及单片机的偏置电压控制与显示程序的设计，并根据温度和偏置电压对探测器比探测率、噪声等效温差以及噪声电压的影响，合理的设置了探测器偏置电压和工作温度，实现探测器良好的工作性能。 最后，搭建探测器红外成像实验平台，，干涉图像获取系统实验平台，对成像效果进行了测试，获得了300℃下黑体的干涉图像。
[Abstract]:With the rapid development of infrared imaging spectrum technology, the research of long-wave infrared interferometric image acquisition technology has more and more important applications in modern military, security, medical, scientific research, disaster relief and so on. Moreover, the research of interferometric image acquisition technology is very important for the development of interferometric spectrometer and the study of target spectral image information. According to the characteristics of various static interferometers, the equivalent wedge-wedge interferometer is chosen as the interference element of the interferometric image acquisition system, and the UL04371 type uncooled red array detector of ULIS Company of France is chosen as the infrared interferometric image acquisition device. Firstly, the detection principle of interferometric image acquisition is analyzed. The hardware driving and processing circuit uses single chip microcomputer and FPGA as control chip. The MCU STC89C52 is responsible for the control of the adjustable bias voltage of the detector and the display device for the driver and data processing of the detector. The circuit of hardware driving and processing and the circuit of the detector of moving parts are connected by FFC wire arrangement. It is convenient to adjust the position of detector between FPGA and LabVIEW of host computer. The USB2.0 interface circuit is used to communicate with LabVIEW PC to receive and process the data transmitted by USB and display the interference image. Secondly, the FPGA driver control program of the detector, the image data buffer program and the image data receiving and displaying program of LabVIEW, as well as the design of the bias voltage control and display program of the single chip microcomputer are completed. According to the influence of temperature and bias voltage on detector specific detection rate, noise equivalent temperature difference and noise voltage, the detector bias voltage and operating temperature are reasonably set to achieve good performance of the detector. Finally, the infrared imaging experimental platform of detector and the experimental platform of interferometric image acquisition system are set up. The imaging effect is tested and the blackbody interference image is obtained at 300 鈩

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