Research On Nondestructive Testing Methods Of Level Of Timber Construction Engineering Material

Wood used in engineering structure in our country has a long history, with the progress of science and technology, how to adopt low cost, high efficiency, high precision of NDT methods in the quality of timber construction engineering material level to judge effectively has become an important direction of current research on wood nondestructive testing. In this paper, combining the actual situation, the wooden engineering material nondestructive testing method to do the following several aspects of research:1. Used stress wave and ultrasonic wave which is the two common nondestructive testing method for wooden parts on the single ply elastic modulus were measured, and made a contrastive analysis compared with the testing results of static method, then evaluated the main advantages and disadvantages of the two methods of nondestructive testing with respect to the testing wood elastic modulus.2. With double glued wood as test object, in this paper, through artificial simulated glue line defect components by using the method of ultrasonic measured research and data analysis, we have found out the main criterion of discriminant glue line defect of ultrasonic parameters and waveform, and through the measured data, a preliminary analysis and discussion on the ultrasonic transmission method is used to determine the feasibility of the glue line defect boundary location.3. From the perspective of signal processing, by using MATLAB software to glue line defect of ultrasonic wave spectrum analysis and wavelet analysis, so the information contained in the waveform signal are analyzed in more accurate, made up for the deficiency of the only by wave velocity and amplitude analysis of waveform data.