红外无损检测的数值模拟及其对比性研究

红外无损检测技术是一种新型的无损检测技术，具有非接触、检测面积大、检测速度快等优点，现已发展出许多有不同的检测方法，为了研究不同检测方法的优缺点，根据传热学的理论，对比分析红外无损检测的不同检测方法，建立了一个二维导热模型；并利用建立的模型，模拟计算出了试件在不同热激励条件下的温度场，在此基础上实现了对红外无损检测中的脉冲检测法、锁相检测法和脉冲相位检测法的数值模拟，从理论计算的角度比较了这三种红外无损检测方法的优缺点，得出了这三种红外检测技术的最佳使用范围，为红外无损检测的检测方法的选取提供了理论依据。

Numerical simulation and comparative study of infrared technology for nondestructive testing

Infrared thermography is a nondestructive testing and evaluating technique that allows the non-contact inspection and quick monitor large area. There are different detection methods of infrared technology for nondestructive testing. In order to study the advantages and disadvantages of different detection methods, different detection methods of infrared technology for nondestructive testing were comparatively analyzed according to the theory of heat transfer. A two-dimensional heat conduction model was established. The temperature fields of the specimen under different heat source excitation conditions were simulated by using the established model, based on this, PT LT and PPT of infrared technology for nondestructive testing were numerically simulated, from the theoretical point of view, the merit and demerit of the three kinds of methods were compared, the best useful range of three infrared technology for nondestructive testing were obtained, a theoretical basis for the selection of detection method of infrared technology for nondestructive testing was provided.