A parachute opening state monitoring method and system based on drag parachute feature recognition

A feature recognition and drag parachute technology, applied in measurement devices, image analysis, image enhancement and other directions, can solve problems such as the inability of the aircraft's onboard system to feed back information to the pilot, delay the pilot's processing time, and the plane rushing out of the runway, so as to improve flight test safety. The effect of margin, shortening alarm time, and improving reaction time

Active Publication Date: 2022-05-10
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the pilot self-monitoring method, the pilot can only know whether the parachute release mechanism of the aircraft is working normally
When the parachute mechanism of the aircraft releases the parachute correctly, problems such as "hanging" and "entanglement" occur and the parachute cannot be opened correctly, the onboard system of the aircraft cannot feed back information to the pilot, and the pilot cannot feedback through the onboard system Get the information that the umbrella failed
In the commander-assisted monitoring method, it takes a period of time for the commander to observe and judge the failure of parachute release, and the voice call will cause delay. A little carelessness will delay the pilot's processing time, causing the aircraft to rush out of the runway.

Method used

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  • A parachute opening state monitoring method and system based on drag parachute feature recognition
  • A parachute opening state monitoring method and system based on drag parachute feature recognition
  • A parachute opening state monitoring method and system based on drag parachute feature recognition

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Embodiment 1

[0034] A parachute opening state monitoring method based on drag parachute feature recognition, comprising the following steps:

[0035] Step S100: Carry out automatic image recognition and tracking of the area of ​​the parachute release mechanism of the aircraft;

[0036] Step S200: converting the three-dimensional image information collected in step S100 into local two-dimensional coordinates to realize geometric measurement of image elements;

[0037] Step S300: first judge whether the pilot parachute is sent out, if the pilot parachute has been sent out normally, then judge whether the drag parachute is successfully opened, if figure 2 As shown, the stretched resistance parachute includes the reinforcement belt 1 and the canopy surface 2, and the intersection point of the resistance parachute reinforcement belt 1 is used as the feature point 3, and the gradient of the total number of feature points 3 is used to determine whether the resistance parachute is opened or not. ...

Embodiment 2

[0039] This embodiment is optimized on the basis of Embodiment 1. In the step S100, the high dynamic visual tracking technology is used to realize the automatic image recognition and tracking of the area of ​​the parachute release mechanism of the aircraft.

[0040] Further, in the step S100, a high-speed camera with controllable sampling rate is equipped in the area of ​​the parachute mechanism of the aircraft.

[0041] Further, in the step S300, the method for judging whether the parachute is opened successfully is as follows:

[0042] Assuming that the high-speed camera in step S100 takes N pictures per second, at the beginning t 0 The number of feature points 3 counted in the photos taken at any time is M t0 , t 1 The number of feature points 3 counted in the photos taken at any time is M t1 , until the end of the shooting, so the time matrix T and the feature point 3 count number matrix M will be obtained:

[0043] T=[t 0 , t 1 , t 2 ,...,t N-1 , t N ]

[0044] ...

Embodiment 3

[0052] A parachute opening state monitoring system based on the feature recognition of the drag parachute is carried out based on the above-mentioned monitoring method, such as figure 1 As shown, it includes an optical detection module, a resistance parachute detection module, and a voice prompt module, and the image of the aircraft parachute mechanism area is collected by the optical detection module, and is input to the resistance parachute detection module; the resistance parachute detection module The three-dimensional image information is converted into the local two-dimensional coordinates, and the parachute image is recognized and analyzed. The resistance parachute detection module outputs the resistance parachute opening status signal to the voice prompt module, and the pilot broadcasts prompts through the voice prompt module.

[0053] Further, the voice prompt module includes a voice radio station and an airborne radio station connected to each other, and the resistanc...

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PUM

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Abstract

The invention discloses a parachute-opening state monitoring method and system based on feature recognition of a resistance parachute. Firstly, it is judged whether the guide parachute has been sent out. Points are used as feature points, and the gradient of the total number of feature points is used as the threshold for judging whether the drag parachute is successfully opened. The invention judges the parachute opening situation of the drag parachute by measuring the change gradient of the total number of feature points on the drag parachute, and sets a corresponding threshold. When the change gradient of the total number of feature points is lower than a certain threshold, the voice radio station is automatically triggered. Provide voice prompts to realize the pilot's quick judgment and emergency treatment of the parachute opening status of the aircraft. Based on picking up the characteristic points of the parachute opening of the aircraft, the invention can quickly judge whether the parachute opening is successful, shortens the alarm time, improves the reaction time of the pilot and the flight test safety margin, and has good practicability.

Description

technical field [0001] The invention belongs to the technical field of drag parachute opening monitoring, and in particular relates to a parachute opening state monitoring method and system based on drag parachute feature recognition. Background technique [0002] When the length of the runway is limited, in order to effectively reduce the speed after the aircraft lands, part of the drag parachute is used to increase the resistance and reduce the taxiing distance. A typical parachute release process is as follows: After the aircraft lands and slides for a certain distance, the pilot sends out a control command, and the parachute throwing mechanism of the aircraft first throws the guide parachute, and after the guide parachute is fully opened, sufficient pulling force is generated due to wind resistance to pull the main parachute out. It expands to the maximum under the action of drag, and finally generates enough drag to reduce the aircraft speed below the threshold within a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D21/00G01B11/00G06T7/00G06T7/60
CPCG01D21/00G01B11/00G06T7/0002G06T7/60G06T2207/10016G06T2207/10028
Inventor 杨地陈海燕覃建兰
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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