Automatic parachute cutting method for unmanned aerial vehicle

Abstract

Provided is an automatic parachute cutting method for an unmanned aerial vehicle. A weight measuring device is installed on a main parachute rope of a parachute of the unmanned aerial vehicle. A weight detection sensor and a signal processor are arranged in the weight measuring device. The weight of the unmanned aerial vehicle is detected through the weight detection sensor in the descending process. A detecting signal is sent to the signal processor. The signal processor processes a received data signal and compares the data signal with a threshold set in the signal processor. When the measured value is far smaller than the set threshold, a landing signal is given. Meanwhile, an electric cutting device is installed on a parachute cutting device and internally provided with an electromagnetic valve. When the electromagnetic valve receives the landing signal, the electromagnetic valve is disconnected, and the parachute cutting device acts so that automatic parachute cutting can be completed; the error detection / error cutting probability and the missing detection / missing cutting probability of automatic parachute cutting are effectively reduced; and meanwhile, the electromagnetic valve and an electromagnet are arranged in the parachute cutting device, current of the electromagnet can be cut off by disconnecting the electromagnetic valve, and the manufacturing cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of unmanned aerial vehicle parachute cutting, in particular to an automatic parachute cutting method for an unmanned aerial vehicle. Background technique [0002] During the landing process of the parachute UAV, when the UAV lands, the parachute on the UAV must be cut immediately, that is, the parachute needs to be separated from the UAV, so as to prevent the parachute from being blown by the wind on the ground after the UAV lands, and then Pulling the drone makes the drone drag or even roll over on the ground, causing damage to the drone body. At present, the completion of the parachute cutting action of the parachute drone mainly includes manual and automatic two types: [0003] 1) Manual [0004] It is completed remotely by the ground station personnel; [0005] 2) automatic [0006] a) Software automatic [0007] The flight control software program relies on detecting parameters such as the UAV's de...

AI Technical Summary

Problems solved by technology

[0010] The automatic execution of the existing hardware mainly depends on the triggering of the ground contact mechanical switch installed on the body to give a landing signal, thereby starting the umbrella cutting actuator to complete the umbrella cutting. Since the automatic umbrella cutting function must have a small probability of false detection\miscutting, At the same time, the probability of missed inspection / missing cut is small, and the importance of false detection / miscutting is higher than all other indicators. However, the existing hardware automatic actuator-mechanical switch has the hidden danger of sending a UAV landing signal if it is accidentally touched. , the error rate is high, which leads to a high error rate of automatic umbrella cutting

Images