PROBLEM TO BE SOLVED: To support specification of which leg of a four-legged animal has a disease or injury by a simple method.SOLUTION: In a computer, the grounding timing of legs of a four-legged animal is detected and the timing of body weight movement to a rear of the four-legged animal is detected. Based on the detected grounding timing of the legs of the four-legged animal and the detected timing of the body weight movement to the rear of the four-legged animal, a determination is made whether the leg of the four-legged animal has a disease or injury. In that case, the timing of the body weight movement to the rear is detected from the change of the vertical direction components of acceleration of a neck.SELECTED DRAWING: Figure 6【課題】四脚動物のどの脚が疾患やけがを有するかの特定を簡便な方法で支援する。【解決手段】コンピュータに、四脚動物の脚の接地タイミングを検出するとともに、前記四脚動物の後方への体重移動のタイミングを検出し、検出された前記四脚動物の脚の接地タイミングと、検出された前記四脚動物の後方への体重移動のタイミングとに基づいて、前記四脚動物の脚が疾患又はけがを有するかを判定する。その際、後方への体重移動のタイミングは、首の加速度の上下方向成分の変化から検出する。【選択図】図６
