基于误差反馈的LED阵列近场光强检测

doi:10.3969/j.issn.1000-1158.2021.08.03

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Abstract Light emitting diode (LED), which acts as a signal light source in fields such as airports and railways,usually uses the way of arrays of LEDs. The traditional method is to send the light source to the laboratory for detection after disassembly. In this way, the state of the light source at the work site cannot be obtained and the whole detection period is a little long. A method based on illumination error is proposed to solve the above problems. First, in the scene where the lamp is not disassembled or moved, the illumination distribution was detected by moving the illumination probe in the near-field area. Second, presetting the light intensity distribution of each LED. Third, calculating the error between the illuminationwhich was formed at the measuring point under this light intensity distribution and actual illumination that was measured by the illumination probe at the measuring point and updating the setting intensity value and iterating several times until the error is small enough. Final, the approximate light intensity distribution of each LED calculated at this time is superimposed to calculate the light intensity distribution of the entire LED array. The method can quickly and accurately detect the distribution of light intensity of lamps on the spot, while ensuring the portable design of the whole detection system.The experimental results show that the proposed method can detect the light intensity under different conditions, and the matching degree can reach more than 93%.

Key words： metrology;light intensity measurement LED arrays;navigational lighting aid;error feedback

Received: 17 February 2020 Published: 20 August 2021

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TB96

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	HOU Qi-zhen
	MA Bing-zheng

Cite this article:

HOU Qi-zhen,MA Bing-zheng. Near-field Intensity Detection of LED Array Based on Error Feedback[J]. Acta Metrologica Sinica, 2021, 42(8): 993-999.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2021.08.03 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2021/V42/I8/993

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