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Method for measuring angle of central transition region of the two-color beam of LED precision approach path indicator

A measurement method and indicator technology, applied in the field of optical measurement, which can solve problems such as deviation

Inactive Publication Date: 2009-12-23
FUDAN UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for measuring the angle of the central transition zone of the two-color light beam of the LED precision approach channel indicator, so as to eliminate the problem of deviation caused by the current use of visual methods to judge the angle, and realize the optical parameter of the indicator-two-color Precise measurement of the angle of the central transition zone of the beam

Method used

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  • Method for measuring angle of central transition region of the two-color beam of LED precision approach path indicator
  • Method for measuring angle of central transition region of the two-color beam of LED precision approach path indicator
  • Method for measuring angle of central transition region of the two-color beam of LED precision approach path indicator

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Embodiment Construction

[0023] The used elements of the present invention are as follows:

[0024] LED Precision Approach Course Indicator 5: An indicator under test using red and white LEDs as light sources.

[0025] Test screen 4: Be able to receive light beams with a horizontal field of view of ±10° and a vertical field of view of ±4° from the precision approach course indicator of the LED at a certain distance from the indicator. The size of the test screen is the same as that of the LED The distance between the precision approach channel indicator and the test screen is related. In this example, the distance is 5 meters, and the effective range of the test screen size is 1.763×0.699m 2 , which is taken as 1.8×0.8m in this example 2 , and the test screen can allow the beam to pass through uniformly.

[0026] V(λ) filter 3: Make the spectral responsivity of the CCD camera match as close as possible to the spectral viewing function V(λ) of the human eye.

[0027] CCD camera 2: The light beam pas...

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Abstract

The invention belongs to the field of optical measuring technology, in particular relates to a method for testing the angle of the central transition region of the two-color beam of an LED precision approach path indicator. The method comprises test system building, testing and sampling, data processing, and the like. A test system comprises an LED precision approach path indicator to be tested, a test screen, a V (lambda) optical filter, a CCD video camera and a computer. By the V (lambda) optical filter, the CCD video camera is used for acquiring the gray-scale value of the two-color beam emitted by the LED precision approach path indicator; processing acquired data by a mathematical method and a computer image processing technology to further obtain the angle of the central transition region of the two-color beam, thereby precisely testing the angle of the central transition region.

Description

technical field [0001] The invention belongs to the technical field of optical measurement, and in particular relates to a method for measuring the angle of the central transition zone of two-color light beams of an LED precision approach channel indicator. Background technique [0002] After the semiconductor technology triggered the microelectronics revolution, it is gestating a new industrial revolution---lighting revolution. The characteristics of light-emitting diodes (LEDs) make them widely used in the fields of display and special lighting. In the field of aviation lamps, various lamps are gradually using LED as their light source to achieve the purpose of energy saving and emission reduction. [0003] With the rapid development of the aircraft industry and the use of jet aircraft, the approach speed of the aircraft is getting faster and faster, and the approach time is getting shorter and shorter, so it becomes more important to provide pilots with accurate approach...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/26
Inventor 葛爱明魏敏晨
Owner FUDAN UNIV
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