Abstract: A material parameter tester of fiber-reinforced composite materials based on the laser non-destructive scanning technique is developed. Firstly， by taking the fiber-reinforced composite beam specimen as an example， the theoretical solutions of natural frequencies and vibration responses are deduced. Then， an appropriate step size is chosen to construct the iterative vector of the material parameters， and the theoretical principle for identifying the fiber-reinforced composite material parameters is explained in details. Next， the excitation platform， laser scanning device， signal generator and data acquisition device are utilized to establish the hardware structures， and the functions as well as the control and measurement advantages of the software and corresponding modules based on LabVIEW are also described. Finally， by using this instrument， the material parameters of three TC500 carbon fiber/resin composite beam specimens in different fiber directions are identified， which are also compared with the material results provided by the manufacturer. The results show that their deviations are in the range of 0.63%~10.61%， which is within an acceptable level. Therefore， the reliability of the developed composite material tester and the effectiveness of the related algorithm have been verified.

Key words: fiber-reinforced composite material, material parameter tester, parameter identification, laser non-destructive scanning