Ice accumulation detection method and system based on temperature sequence similarity measurement, terminal and application

Abstract

The invention discloses an ice accretion detection method and system based on temperature sequence similarity measurement, a terminal and application, and relates to the technical field of wing ice accretion detection. The method comprises the steps: collecting a wing surface temperature change sequence with the ice accumulation phenomenon, and obtaining a wing temperature change rate sequence; calculating the distance D1 between the wing surface temperature change sequence and the standard temperature change sequence when the wing surface is iced under the current meteorological condition and the distance D2 between the wing temperature change rate sequence and the standard temperature change rate sequence when the wing surface is iced through a dynamic time warping method; processing the distance D1 and the distance D2 according to an icing model to obtain an icing detection result, and giving an alarm in time when icing occurs. The ice accretion detection method provided by the invention has the advantages of fast response, strong anti-interference capability, easy implementation and the like; in combination with a non-contact infrared temperature sensor, non-contact ice accumulation detection can be achieved, the aerodynamic configuration of the wing is prevented from being affected, and the application prospect is good.

Description

technical field [0001] The invention belongs to the technical field of wing ice accumulation detection, and in particular relates to an ice accumulation detection method, system, terminal and application based on temperature sequence similarity measurement. Background technique [0002] At present, as a modern and efficient means of transportation, airplanes have brought great convenience to people's travel. Ensuring flight safety is the top priority of airlines of all countries, and it is also the greatest wish of every passenger. Despite the continuous improvement of aircraft performance and continuous improvement of ground support equipment, aircraft icing is still one of the important factors affecting flight safety. Ice accumulation on the surface of the airframe, especially the wings, will seriously affect the safety of aircraft take-off and landing. According to relevant flight tests, 2-3 mm of ice accumulation on the wings will increase the stall speed of the aircra...

AI Technical Summary

Problems solved by technology

Because it only needs to collect the image of the wing surface, it will not damage the wing structure and is easy to implement; however, this method requires high image quality. Due to the influence of equipment quality and environmental factors, the image may generate a lot of noise, which leads to detection The result is a large error

[0004] The sensor detection method mainly uses the different characteristics of ice medium and air medium to design different sensors to realize icing detection; (1) according to the different reflection characteristics of infrared light in air and ice, an infrared ice accretion sensor is designed. Judging whether there is ice accumulation by the intensity of the reflected infrared light received; the infrared ice accumulation sensor has the advantages of high precision and fast response, but the cost is expensive, it is greatly affected by ambient light, and its anti-interference ability is weak; (2) according to When there is ice accumulation on the surface of the diaphragm, its stiffness and quality will change, which will cause the change of the resonance frequency. A resonant ice accumulation sensor is designed to judge whether there is ice accumulation by detecting the resonance frequency of the diaphragm; the resonant ice accumulation sensor has High precision, good anti-interference ability and other advantages, but it is large in size, difficult to install, and difficult to implement

(3) In addition, there are fiber-optic icing sensors, capacitive icing sensors, ultrasonic icing sensors, etc., but they all generally have large volume, weak anti-interference ability, poor real-time performance, complicated wiring, and it is difficult to realize the demand for miniaturization and intelligence. and other defects; Jayana and others proposed an ice accretion sensor based on surface acoustic waves (patent number: CN201811603907.1). The sensor is small in size and can be used for wireless passive measurement. It has good application prospects, but the manufacturing process is complex and cumbersome , is still in the research stage and has not been practically applied

[0006] (1) In the prior art, when image processing methods are used for ice accumulation detection, the image quality requirements are high, and various external factors have a great influence on its detection accuracy, and the anti-interference ability is weak;

[0007] (2) In the prior art, most ice accretion sensors have problems such as large volume, complicated wiring, difficult installation, and difficulty in application and promotion;

[0008] (3) Affected by various external factors, the actual application of the existing ice accumulation detection technology will be limited in terms of detection range and detection accuracy.

[0012] In order to solve the problems of weak anti-interference ability, large volume and difficult practical application of the existing ice accumulation detection method, the present invention proposes an ice accumulation detection method based on temperature sequence similarity measurement in combination with the temperature change characteristics when the wing surface is icing

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