WIPER VIBRATION MEASURING DEVICE AND WIPER VIBRATION MEASURING METHOD

• Main Authors: MARUCHI KATSUYA, OTA SHUNSAKU
• Format: Patent
• Language: English; Japanese
• Published: 03.07.2023
• Subjects: CALCULATING; COMPUTING; COUNTING; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES; MEASURING; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

To provide a wiper vibration measuring device and a wiper vibration measuring method with which it is possible to easily measure the minute vibration of a wiper during wiping operation.SOLUTION: A coordinate data list obtained by linking a pixel coordinate of an end part Wbx of a wiper blade Wb which is displaced at every time is acquired from moving-image data Da including a wiper W1 in an operating state. Next, a pixel coordinate position in the coordinate data list is converted to a position on a circular arc wiping locus of the wiper blade Wb. Then, a temporal change of the position on the wiping locus is frequency-analyzed, and a measurement result of a minute vibration that may occur during wiping operation of the wiper W1 is obtained. A series of image processing can be coped with by installing an easily available, easily handleable open source function program to a terminal 23 for measurement. That is, the minute vibration can be easily measured by capturing a moving-image of the wiper W1 which performs wiping operation by a familiar camera 21 and processing the image by the open source function program.SELECTED DRAWING: Figure 2 【課題】払拭作動時のワイパの微小振動の測定を簡易に行い得るワイパ振動測定装置及びワイパ振動測定方法を提供する。【解決手段】作動状態にあるワイパＷ１を含む動画データＤａから、都度変位するワイパブレードＷｂの端部Ｗｂｘのピクセル座標を時間と紐付けた座標データリストが取得される。次いで、座標データリストにおけるピクセル座標位置がワイパブレードＷｂの円弧状の払拭軌跡上位置に変換される。そして、払拭軌跡上位置の時間変化が周波数解析されて、ワイパＷ１の払拭作動時に生じ得る微小振動の測定結果が得られる。一連の画像処理は、入手が簡単で扱いも簡単なオープンソースの機能プログラムの測定用端末２３へのインストールで対応できる。つまり、払拭作動するワイパＷ１を身近なカメラ２１で動画撮影し、オープンソースの機能プログラムによる画像処理にて簡易に実現可能である。【選択図】図２