Research On Adaptive Detection Technology Of Ultrasonic Phased Array

As a key part of the train running department,the rim directly affects the safe operation of the train.Long-term rolling contact between the rim and the steel rail in a high-speed,hightemperature environment is prone to internal cracks.The presence of cracks greatly reduces the quality and safety of the rim,causing great safety hazards for high-speed trains.Based on this,this paper analyzes the propagation models of ultrasonic waves in the plane interface,arc interface,and sinusoidal interface in the immersion environment.The synthetic aperture ultrasonic immersion algorithm model and the ultrasonic forward vector algorithm model are established.Through simulation and experiment,the ultrasonic water immersion detection inside the detection component is realized.The main research contents of this article are as follows:1.The ultrasonic forward vector algorithm is explained from the forward thinking,and the mean processing is introduced to realize the ultrasonic water immersion detection of plane test block.The results show that the forward vector algorithm is feasible in water immersion detection,and it can ensure the quality of imaging and improve the efficiency of detection.2.In order to solve the problem that the incident normal of ultrasonic in the arc interface will change with the difference of array element and refraction point,this paper first analyzes the geometric propagation model of the arc interface of ultrasonic wave in the water immersion environment,establishes the ultrasonic forward water immersion detection algorithm of the train rim,then collects and stores the corresponding experimental data by using CIVA and detection platform,and finally,visually evaluates the three algorithms.The results show that for the arc parts of train rims,the ultrasonic forward vector algorithm can significantly improve the imaging efficiency while ensuring high resolution imaging.It provides an effective detection method for the detection of arc components such as wheel rim in industrial detection.3.The interface reconstruction algorithms are introduced to realize and analyze the surface reconstruction of complex components;the adaptive ultrasonic imaging algorithm is established based on the propagation model of ultrasonic on complex surfaces and the corresponding imaging algorithm.the experimental platform for rim and sinusoidal test block are built,and the collected data are processed adaptively to realize the adaptive ultrasonic water immersion detection of test object.The results show that the adaptive ultrasonic water immersion detection algorithm can achieve the internal detection of complex components;compared with the synthetic aperture focusing algorithm,the ultrasonic forward vector algorithm has better detection capabilities.