台灣午後多雷雨,山區中上游易發生溪水暴漲情形,每年夏季奪去好幾條生命。但目前沒有針對溪流暴漲的救難設施,因此我們改良現有拋繩袋,增加浮板式外袋以利待救者抓取。並設計具有咬繩機構的放繩器,可因應急流速度放繩,增加救援者安全。 Every summer in Taiwan, many people drown after falling into surging rivers which are fed by afternoon shower. However, we do not have rescue devices which aim to deal with this situation now. Therefore, we redesign the present water rescue bag by adding floating bag outside. With it, victims can hold the bag by any way easily. Also, we design the auto-releasing machine which can automatically release the rope with the speed of stream to enhance the safety of rescuer.