A ground-motion-detecting device used to improve the conveniences of conventional motion-detecting devices is disclosed. The ground-motion-detecting device includes at least one cushion and a control module. The at least one cushion includes a plurality of stress sensors and a control unit, with the plurality of stress sensors mounted between two surface of the cushion, with the plurality of stress sensors coupling with each other, and with the control unit coupling to the plurality of stress sensors. The control unit is capable of detecting the amount of the stress sensors turned on. The control module couples to and powers the control unit of the at least one cushion. The control module further collects the amount of the stress sensors turned on of the at least one cushion, and presets a threshold value and a warning time.一種地板動作偵測裝置,用以進行人體跌倒受傷不起之動作偵測。該地板動作偵測裝置包含:至少一墊體,各該墊體均包含複數個受力感測器及一控制單元,該複數個受力感測器設置於該墊體之二表面之間,且該複數個受力感測器係相互耦接,該控制單元係耦接該複數個受力感測器,以偵測該複數個受力感測器中,呈導通狀態之受力感測器之數目;及一控制模組,耦接上述至少一墊體之控制單元,以對該控制單元供電,並接受上述至少一墊體之複數個受力感測器中,呈導通狀態之受力感測器之數目,該控制模組中另預設一閥值與一警戒時間。1‧‧‧墊體11‧‧‧第一表面12‧‧‧第二表面13‧‧‧受力感測器131‧‧‧微動開關14‧‧‧控制單元15‧‧‧結合部16‧‧‧電性連接部2‧‧‧控制模組21‧‧‧警示單元
