CCD Photoelectric Measurements in Calibrators for Vehicle Headlamp Tester
Vehicle headlamp is a very important component for safe driving. The calibration of vehicle headlamp must be done in accordance with standard (JJG967-2001), such as the distribution of shade and the luminosity distribution of far light and close light. Photoelectric measurements, for example, electronic scanning system, dot array of photoelectric cell system and CCD measurement system, were used to research the shade distribution and the luminosity distribution. In order to expedite the measuring process and acquire more accurate parameters, CCD measurement system is proposed to measure more characteristic parameters of headlamp at higher speed. Image processing technology is utilized to get the characteristic parameters such as luminous intensity and optic axis deviation angle for headlamp. Some software algorithms of digital image processing can be used to achieve an uncertainty of luminous intensity of less than or equal to 2％, and an uncertainty of deviation angle of optic axis of less than or equal to 1.6 minute. Experimental results showed that it has many advantages such as high precision, good repetition.
CCD far light close light automobile headlamp image processing technology
Lu Yi Luo Zai Yu Gui-Ying Zhu Wei-Bin
College of Metrology & Measurement Engineering, China Jiliang University,Hangzhou 310018, China College of Metrology & Measurement Engineering, China Jiliang University, Hangzhou 310018, China
国际会议
第五届仪器科学与技术国际学术会议(ISIST 2008)Fifth International Symposium on Instrmentation Science and Technology
沈阳
英文
1-6
2008-09-15（万方平台首次上网日期，不代表论文的发表时间）