Trampoline testing equipment and testing method

Abstract

The invention discloses a trampoline detecting device and method, and belongs to the technical field of trampoline detecting. A speed adjusting motor (15) is fixed to a detecting position adjustment mechanism, connected with a motor controller, and controlled by the motor controller to be accelerated to reversely rotate, an impacting ball (19) performs completely free falling, a first camera (9) and a second camera (10) shoot rebounding images of the impacting ball (19), a third camera (12) shoots sunk images of the net face of a trampoline (1), and the first camera (9) and the second camera (10) receive pulse signals to respectively capture one image at the same time. The trampoline detecting method includes the steps of converting the captured color images into binary images, computing pixel difference values of the gravity center of the impacting ball (19) relative to the central points of the images, and obtaining the three-dimensional displacement of the impacting ball (19) and the sunk depths of the trampoline (1) through products of the pixel difference values and space resolutions. The trampoline detecting device has the advantages of being simple in structure, convenient to detect, accurate in result and the like.

Description

technical field [0001] The invention relates to a trampoline detection device and a detection method, which belong to the technical field of trampoline detection, and specifically relate to a detection device and a detection method for detecting the rebound height and the horizontal and vertical offsets of an impact ball after it hits a trampoline in free fall. Background technique [0002] In order for all trampoline athletes to have a fair chance to compete, it is necessary to control the performance of the trampoline and minimize the difference between competition and training equipment. The IAAF requires the trampoline to be tested. For the impact trampoline, the camera is used to record the rebound height of the impact ball and the horizontal and vertical offsets, as well as the sinking depth of the trampoline mesh. At present, the commonly used detection method is the direct linear transformation method. The reconstruction of the three-dimensional coordinates of the sp...

AI Technical Summary

Problems solved by technology

At present, the commonly used detection method is the direct linear transformation method. The reconstruction of the three-dimensional coordinates of the space can be realized through more than two cameras, and the detection of the impact ball can be realized. This method needs to calibrate the cameras in advance, and the calibration process of the cameras is very complicated. 6 control points, generally more than 16 control points are needed to calibrate the parameters of the camera more accurately, and it is easy to introduce calibration errors during the calibration process, and the parameters of the camera are also easy to change with time, transportation process, and installation process in the stadium, resulting in Inaccurate measurement of impact ball

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