红外热成像系统的采集与驱动电路设计  

Design of Acquisition and Driving Circuit for Infrared Thermal Imaging System

作　　者：任其干[1] 谭钦红[1] 万志卫[1] 

机构地区：[1]重庆邮电大学信号与信息处理重点实验室,重庆400065

出　　处：《红外》2011年第2期13-17,共5页Infrared

基　　金：国家自然科学基金项目(60602057);国家自然科学基金-中物院NSAF联合基金项目(10776040)

摘　　要：高精度采集电路是构成高精度红外热像仪的重要组成部分。在简单介绍红外热成像系统基本原理的基础上,给出了用法国ULIS公司的384×288元非致冷红外焦平面阵列探测器设计的红外成像系统的硬件构成。该系统采用CPLD复杂可编程逻辑器件作为采集与驱动时序电路的核心控制芯片,以VSP2566作为采集芯片,把探测器输出的模拟信号转换为16位数字信号,然后将其送至数字信号处理器(DSP)作进一步处理和显示。与直接采用探测器的12位数字输出相比,该设计具有较高的测温精度和成像质量。A high precision acquisition circuit is an important component of a high precision infrared thermal imager.The basic principle of an infrared thermal imaging system is described in brief.The hardware structure of an infrared imaging system using a 384×288-pixel uncooled infrared focal plane array produced by ULIS company is given.The system uses a Complex Programmable Logic Device （CPLD） as the core control chip of its acquisition and driving circuit and uses a VSP2566 as its acquisition chip.The acquisition chip converts the analog signal output from the detector into a 16-bit digital signal and then sends the digital signal to a Digital Signal Processor（DSP） for further processing and displaying. Compared with the scheme which directly uses the 12-bit digital output of the detector,this design has higher temperature measurement accuracy and higher imaging quality.

关 键 词：非致冷红外焦平面阵列 采集电路 复杂可编程逻辑器件 数字信号处理器 

分 类 号：TN215[电子电信—物理电子学]