Study On Amusement Facilities Spindle In-situ Inspection Method And Imaging System

Spindle is the core part of amusement facilities, and bears most of the weight offacilities. Its quality and work condition directly affects the whole equipment operationand even citizens’ personal safety, therefore its quality being effectively and accuratelyinspected and evaluated is very important. At present the most reliable detection methodis demountable detection, after the spindle is detected after it’s removed from theequipment. But for large amusement facilities, dismantle and reinstall are both quitedifficult and will consume large amounts of human, material and financial resources,and much time. According to the characteristics of spindle, author studied the in-situultrasonic testing method, and developed the manual scanning ultrasonic imagingequipment base on the method. Main tasks are as follows:The author used ABAQUS, which is finite element simulation software, tosimulate the wave field of waveform conversion which must be noticed for testingpersonnel, in order to guide the probe selection and discrimination of waveform.Designed and produced saturation sample to test different detective sensitivity andsaturation value to groove in different probe parameters, which provide theexperimental basis for determining the parameter in detection.Designed and produced different kinds of spindle work-pieces, which haveartificially defects based on the internal force characteristics of spindle of amusementfacilities, the defect locations and the main types of defect. Choose appropriatetransducers, according to the finite element simulation and saturation testing，to detectthe spindle work-pieces.The author wrote localization software in order to help to determine the position ofdetects. In the premise of velocity of wave and probe parameters being tested accurately,this software can display the depth of flaw echoes and the horizontal distance from thecenter of circle, also can get the echo numbers be used and schematic diagram ofultrasonic wave propagation path. Manual testing with this software can accuratelylocate the position of defects, which can satisfy the manual detection flaw locationrequirements.In order to realize visualization, we developed an ultrasonic manual scanningimaging system. Two different color light-emitting diodes (LED) are installed in the top of the probe, which are used for the location markers, and CCD camera to identify theposition of light emitting diode in order to determine the incident point and the incidentdirection of ultrasonic wave. According to the information of position and directionwhich CCD camera capture, probe and defect location can be realized. It solved theproblem that the equipment installed difficultly when airborne worked outdoor by usingmanual scanning in place of mechanical scanning.In imaging way, the system use a part of features of ultrasonic F scanning, andachieves the graphic display of defects on condition of all the ultrasonic wave signalsbeing collected。And the stored data can be displayed by post-procession.