6 results about "Aircraft Accident" patented technology

The invention discloses an aircraft flight data accident investigation inversion method based on video image data, and the method comprises the steps: S1, screening a front video image P1 and a rear video image P2 from video stream data, obtaining the actually measured longitude and latitude and elevation of reference objects A and B and the distance from the reference objects A and B to a shooting position, and obtaining the conversion coefficient of the pixel distance and the actually measured distance in the video images; s2, constructing a geographic coordinate system taking a camera shooting position as an original point and taking the ground as a coordinate plane, performing conversion processing through a conversion coefficient, uniformly expressing the converted information to the geographic coordinate system, respectively calculating geographic coordinate information of an aircraft position C and an aircraft position C1, fitting a connecting line to serve as a speculative trajectory, constructing a flight data set, and storing the speculated trajectory containing the geographic coordinate information into a flight data set and outputting the flight data set. According to the method, important flight data such as the track, the speed and the height of the accident aircraft can be obtained through inversion based on the video stream data, and accurate and reliable flight data support is provided for aircraft accident investigation.

The application discloses a dangerous driving risk quantitative evaluation and early warning grading method considering risk superposition, relates to the field of aircraft driving safety, and comprises the following steps: selecting pilot dangerous driving single-source risk representation indexes and quantifying, constructing a pilot dangerous driving single-source risk quantitative evaluation model and a pilot dangerous driving multi-source risk superposition model; predicting pilot dangerous driving comprehensive risk; grading pilot dangerous driving comprehensive risk; issuing a grading early warning signal to the pilot according to a prediction structure; and comprehensively analyzing pilot dangerous driving behavior characteristics by constructing a pilot dangerous driving risk quantitative evaluation model and grading early warning of the result, so that efficient perception, prediction and early warning of pilot dangerous driving risk can be realized, and therefore, the aircraft accident rate is reduced, and the aviation transportation safety is improved.

The present application relates to the technical field of explosive information comparison, and specifically discloses a three-dimensional comparison and analysis method for explosive information, which comprises the following steps: S1. conveying package detection, S2. conveying package analysis, S3. conveying package hazard judgment, S4. dangerous article processing, S5. dangerous article associated personnel analysis, and S6. associated personnel related information processing. The present application remedies the defect that the existing technology does not pay high attention to the apparent material quality of the internal articles of a package, thereby improving the accuracy of airport explosive detection to a certain extent and reducing the incidence of aircraft accidents. The present application automatically pushes dangerous articles into an explosion-proof area, thereby improving the relevant income of the airport, overcoming the defect of the subjective initiative of the staff, and reducing the harm to the life safety of the staff. The present application remedies the defect that the existing technology requires the staff to trace through monitoring, thereby reducing the waste of resources when the relevant personnel are investigated.

The invention discloses a method for testing the wear resistance of an airport machine-made sand road panel, and relates to the technical field of airport machine-made sand road panel wear resistance testing. A support frame; an aircraft take-off and landing simulation mechanism; an aircraft simulation device; a test piece; the method comprises a first test mode, a second test mode and a third test mode. According to the invention, the performance of the wear-resistant layer on the surface of the test piece can be tested in multiple modes, including the influence of an aircraft take-off state on wear resistance, the influence of an aircraft landing state on wear resistance and the influence of an aircraft accident state on wear resistance, and the wear resistance of the wear-resistant layer can be fully verified through the tests; and a data reference is provided for the improvement of the pavement slab and the flight safety of an airplane.

The invention belongs to the technical field of aircraft flight control systems, and particularly relates to an aircraft autopilot control logic safety evaluation method, which comprises the following steps: acquiring all safety factors, and dividing all safety factors into first-level safety factors, second-level safety factors, third-level safety factors and necessary safety factors; when the safety factor meets the condition, assigning 1, otherwise assigning 0; adding different coefficients to the first-level safety factor and the second-level safety factor, and accumulating the coefficient of each safety factor and the assigned value to obtain a safety evaluation value; when any necessary safety factor does not meet the condition, assigning 0 to the safety evaluation value; safety evaluation is carried out on the control logic of the autopilot based on the safety evaluation value, the safety of the system is improved, and aircraft accidents caused by the design of the autopilot can be eliminated.

This invention discloses a method for inverting aircraft flight data accident investigations based on video image data. The method includes: S1, selecting two consecutive video images P1 and P2 from the video stream data, obtaining the measured latitude, longitude, elevation, and distance from the camera position to reference objects A and B, and obtaining the conversion coefficient between the pixel distance in the video image and the measured distance; S2, constructing a geographic coordinate system with the camera position as the origin and the ground as the coordinate plane, converting and processing the data using the conversion coefficient, and uniformly expressing it on the geographic coordinate system, calculating the geographic coordinate information of aircraft position C and aircraft position C1 respectively, fitting a line to form the inferred trajectory, constructing a flight dataset, storing the inferred trajectory containing geographic coordinate information in the flight dataset, and outputting it. This invention can invert and obtain important flight data such as the trajectory, speed, and altitude of the aircraft involved in the accident based on video stream data, providing accurate and reliable flight data support for aircraft accident investigations.