A kind of safety device for wheelchair of what is closed in this creation system,It is that one frame body of what is equipped with driving wheel and steering wheel； One power unit drives two driving wheel； One steering unit controls two steering wheel and rotates an angle； One control unit automatically controls the power unit and the steering unit actuation； The what frame body is arranged at least one first detecting unit,And can emit and receive the first detection signal of an inclination to the ground,To detect the pit-hole on ground,Ditch,The barriers such as recess or downward ladder,And it issues one first control signal to control unit and carries out automatically controlling； One power supply unit,It is for should power unit,Steering unit,Control unit,Required electric power when the first detecting unit actuation； Use can ensure that wheelchair what advance,Safety when Hou moves back and turns.本創作係關於一種輪椅安全裝置，係於一架體設有主動輪及方向輪；一動力單元驅動該二主動輪；一轉向單元控制該二方向輪轉動一角度；一控制單元自動控制該動力單元及該轉向單元作動；至少一第一偵測單元設置於該架體，並能發射及接收一向地面傾斜之第一偵測訊號，用以偵測地面上之坑洞、水溝、凹陷或向下之階梯等障礙物，並發出一第一控制訊號至該控制單元進行自動控制；一供電單元，其係供應該動力單元、轉向單元、控制單元、第一偵測單元作動時所需之電力；藉以可確保輪椅於前進、後退及轉彎時之安全性。
