Its principle is : a laminated structure ( beam or plate ) with delamination consists of undelaminated region and delaminted region which can be divided to upper and lower parts . when a low - amplitude and high - frequency excitation has the frequency close to some part ' s natural frequency , this part will resonate and certain amount of mechanical energy will convert to heat so that the delaminated region ' s temperature exceeds greatly that of the undelaminated region . therefore the delamination can be located by means of infrared thermograph 其原理是具有脱层的层合材料构件(梁或板)包含脱层区域及未脱层区域，脱层区域分为上下两部分，若对层合材料构件施加小振幅、高频率的振动激励，当激励频率恰好接近其中一部分的固有频率时，该部分就会产生共振响应，部分机械能将转化为热能，使脱层区域的温度远高于未脱层区域，借助红外热像仪即可显示出脱层的位置。
After deep analysis of system structure and circuit design , we redesigned all of circuits of the thermal imager . with the hi - speed parallel processing ability of fpga and the event - intensive controlling ability of mcu , we improve image quality effectively , eliminate the image defects and by adopting human - machine dialog mode , make the way of debugging and controlling more intellectualized , and shorten the time of debugging greatly 通过对类热像仪的系统结构及设计原理进行深入分析，将所有电路都重新进行了设计，利用fpga的高速并行处理能力以及mcu的事务密集型的控制能力有效的改善了图象质量，消除了以往的图象缺陷，并且采取人机对话方式使调试、控制手段智能化，缩短了调试时间。
In the middle 1960s , it began to be applied in detecting the fault of electronic facility in foreign countries . in the 1970s , thermal instrument had been installed in helicopter to detect the connection of power line and the determinant standard about infrared test had been established . in the middle 1980s , ir technology had a comprehensive application on the fault of print circuit board ( pcb ) 国外应用红外技术检测电气设备故障始于六十年代中期，七十年代开始把热像仪装在面包车或直升机上对变电站设备或高压输电线路连接件故障做巡回检测，并分别制订出相应的技术规范或红外诊断故障判定标准。
The design thought of the infrared nondestructive evaluation system software is : its precondition is to satisfy the requirements of the petroleum chemistry corporations , it can make the software and the infrared scanner combined perfectly , it can realize the infrared nondestructive detection automatically 红外无损评估系统软件的总体设计思想是：以满足石化企业的生产需要和实际应用为前提，针对红外热像仪，使软件与硬件充分结合，以实现红外无损检测技术操作过程的全自动化。
Anti - infrared extinction coefficient is a key parameter to assess the obscuring performance of smoke - screen , a method to calculate the viriation of radiant energy and obtain the extinction coefficient based on the temperature tested by a thermal imager has been proved , the practical situation and notice in test also has been illustrated 摘要红外消光系数是衡量烟幕对红外遮蔽能力的关键参数，文中提出利用热像仪测得的温度数据，通过计算得到红外辐射能量变化及消光系数的方法，介绍应用情况及测试中应注意的问题。
The demonstration of heat - transfer measuring techniques and prospect of infrared thermal mapping techniques , main parts and performance indexes of a infrared camera , functional blocks and implementation of infrared processing software , experimental facility and measuring system of the wind tunnel has been made . the model emittance was experimentally determined and the three methods correcting directional emittance were compared . those problems of the infinite - slab model thickness and constant wall heat rates hypothesis , the determination of adiabatic wall temperature were discussed in a 1 - d heat conduction analysis 本文对红外热图测热技术与应用前景、红外热像仪主要部件与性能指标、红外测热数据处理软件功能模块与实现、风洞试验设备与测量系统等进行了论述，测量了模型表面发射率并对发射率随极角变化的三种修正方法进行了对比，对一维热传导分析中模型壁厚半无限假设、壁面热流定常假设、绝热壁温选取等进行了探讨。
The realization thought of the infrared nondestructive evaluation system software is : it can read and analyze the output image of the infrared scanner to get the information of the heating furnace , and then realize the function of image displaying , temperature analyzing , thermal insulation performance evaluation and damage detection 红外无损评估系统软件的实现思想是：读取红外热像仪拍摄得到的设备图像，从图像中获得加热炉的信息，然后进行图像再现、温度分析、保温性能评估和损伤探测等。
This text draws the basic principle of infrared diagnoses based on the primary knowledge of infrared radiation , and analyse the imaging principle of infrared devices ; from the view of infrared diagnostic technology we discuss the fault models and the principium of infrared diagnosis on electrical equipments ; then this paper research the diagnosis of electrical equipments fault by using infrared devices , obtain the hot picture atlas of equipment fault and analysis the hot picture atlas ; the text analyse the various kinds of possible factor which might effect the results of infrared diagnosing in electrical equipments , and propose correspondingly countermeasure against these factor in order to improve the accuracy of measurement ; finally , by using infrared diagnosing techniques analyse and diagnose the interior or exterior fault in part of transformers and arresters in electric network of si chuan , and the results obtained from the text accord with practice 本文在红外辐射的基础知识上引出红外诊断的基本原理，分析了红外成像仪的成像原理；并从红外诊断的角度研究了电气设备的故障模式及其诊断的机理；研究了利用红外热像仪对电气设备的故障进行诊断，获取设备故障热像图谱并进行热像图谱的分析；对影响电气设备红外技术诊断结果的各种可能因素进行了分析探讨，并针对这些干扰因数，提出了相应的对策，以提高检测的准确性；论文最后应用红外热成像技术对四川电网中的部分变压器和避雷器典型的内外部故障进行了诊断分析，得到与实际相符的结果。
Infrared thermography is a relatively new technique in the field of nondestructive detection . infrared scanner can measure the surface temperature of the object rapidly , leaving the object untouched and undamaged . through the surface temperature distribution , the working status of the equipment can be evaluated 红外热像技术是近年发展起来的一种新的无损检测方法，用红外热像仪可以无损、快速、非接触地探测出物体表面温度场分布，从而推导出生产设备材料的工作状况。
