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An icing detection device and icing detection method based on a light guide plate

A detection device and detection method technology, applied in deicing devices, transportation and packaging, aircraft parts, etc., can solve problems that do not have engineering significance, and achieve the effect of simple structure, low price and easy realization

Active Publication Date: 2021-12-21
LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, large-scale ice accumulation detection requires the integration of large-scale optical fiber detectors and signal processing, which in turn requires a large number of independent photoelectric conversion, electrical signal amplification, multi-way switches and other back-end signal acquisition and processing hardware. Points are on the order of tens or hundreds, such system integration is no longer of engineering significance

Method used

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  • An icing detection device and icing detection method based on a light guide plate
  • An icing detection device and icing detection method based on a light guide plate
  • An icing detection device and icing detection method based on a light guide plate

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Effect test

Embodiment 1

[0039] An icing detection device based on a light guide plate, such as Figure 1-Figure 3 As shown, it includes a light guide plate 10 and a photosensitive receiving device 30; the inner surface and the outer surface of the light guide plate 10 are symmetrically provided with a plurality of inner light-emitting points 12 and outer light-emitting points 11; the position of each inner light-emitting point 12 is fixed. A photosensitive receiving device 30; all the photosensitive receiving devices 30 are connected in series, and the data acquisition system is connected to the end surface of the light guide plate by connecting the series leads; at least one end surface light source 40 is arranged on the two ends of the light guide plate.

[0040] The light guide plate 10 is a thin plate with reflective surfaces on both sides, so as to ensure that the optical fiber is not emitted from the two sides, but is always guided inside the light guide plate to reduce light loss. The reflecti...

Embodiment 2

[0048] This embodiment also relates to an icing detection device based on a light guide plate. Compared with Embodiment 1, this embodiment 2 differs in that the icing detection device of this embodiment is also provided with an accurate measurement light source 20 .

[0049] Due to the increase of the length of the light guide plate on the light guide plate 10, the light emitted by the end surface light source 40 propagates through a long distance, and a certain amount of light loss will occur on the propagation path, so that the signal-to-noise ratio of the photosensitive receiving device near the light-emitting point at a relatively long distance Reduced, resulting in measurement errors, especially the detection results of specific important points to be detected are not accurate.

[0050] In order to be able to accurately measure the ice accumulation at a specific point to be measured, an accurate measurement light source 20 can be optionally set at the light exit point 12 i...

Embodiment 3

[0056] This embodiment provides an icing detection method, which uses the icing detection device based on the light guide plate in Embodiment 1 for detection.

[0057] The icing detection device in Embodiment 1 is embedded in the notch of the aircraft skin, those skilled in the art can understand that a notch is set on the aircraft skin, and the icing detector is arranged in this notch, so that the guide The outer surface of the light panel 10 can directly contact the ice accumulation on the surface of the aircraft, so as to measure the ice accumulation on the skin surface of the aircraft.

[0058] During measurement, open an end surface light source 40 and photosensitive receiving device 30, when there is no ice accumulation on the aircraft surface, the photosensitive receiving device only receives the light of the outgoing light intensity (this light beam is the light that the inner light emitting point sends); When it is iced, the received light intensity is greater than th...

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PUM

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Abstract

The invention is applicable to the technical field of wind tunnel tests, and provides an icing detection device and an icing detection method based on a light guide plate. The detection device includes a light guide plate and a photosensitive receiving device; the inner surface and the outer surface of the light guide plate are symmetrically provided with a plurality of inner light-emitting points and outer light-emitting points; a photosensitive receiving device is fixed at the position of each inner light-emitting point; all The photosensitive receiving devices are connected in series, and the series leads are connected to the data acquisition system on the end surface of the light guide plate; at least one end surface light source is arranged on the two ends of the light guide plate. The invention adopts a light guide plate to replace a conventional point light source, reduces the scale and difficulty of a large-area icing detection system, and reduces volume, weight and cost.

Description

technical field [0001] The invention belongs to the technical field of wind tunnel tests, and in particular relates to an icing detection device and an icing detection method based on a light guide plate. Background technique [0002] Icing is one of the main causes of aircraft flight accidents. Icing on the leading edge of the wings and tail of the aircraft will lead to increased airfoil resistance, decreased lift, reduced critical angle of attack, and deterioration of maneuverability and stability, resulting in Serious flight accidents have received widespread attention and research. [0003] The current aircraft icing detection technology has developed various measurement methods such as optical method, thermal method, electrical method, mechanical method and waveguide method. The major disadvantages have been basically eliminated at present; and techniques such as the differential pressure method and the conductance method have not been widely used due to their suscepti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64D15/20
CPCB64D15/20
Inventor 胡站伟何苗柳庆林熊浩王文
Owner LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT