The invention discloses an emergency parachuting device and method for a multiple-rotor unmanned aerial vehicle. The device comprises a measurement and
control unit, an unlocking steering engine, a parachute-throwing spring, a latch, a parachute and a magnetic latching
relay, wherein the measurement and
control unit, the unlocking steering engine, the parachute-throwing spring, the latch, the parachute and the magnetic latching
relay are installed in a parachute bin. The measurement and
control unit comprises a
microcontroller and an
inertia movement measurement unit, wherein the
microcontroller is electrically connected with the unlocking steering engine and the magnetic latching
relay; the unlocking steering engine is connected with the latch through a
rocker arm, and the magnetic latching relay is used for connecting or disconnecting a power supply of a rotor motor; the parachute bin is fixed to the multiple-rotor unmanned aerial vehicle, one end of the parachute-throwing spring is fixed to the bottom of the parachute bin, and the parachute is arranged at the other end of the parachute-throwing spring. The method includes the following steps that the current instant height and acceleration of the unmanned aerial vehicle are acquired, the dropping rate of the unmanned aerial vehicle is worked out, whether the unmanned aerial vehicle flies under a dangerous dropping state or not is judged, and if yes, the power supply of the rotor motor is disconnected, and the parachute is thrown out to make the unmanned aerial vehicle safely land. The emergency parachuting device has the advantages of being simple in structure, low in cost, light in weight, high in
reaction speed and the like.