With the rapid development of science and technology, motor vehicle technology is also undergoing reform and innovation, and the driving safety is the most important issue[1]. In order to strictly control the safety of motor vehicles, the production plant, testing station and maintenance plant are all equipped with headlamp testers for motor vehicle (hereinafter referred to as a light tester) to detect the lighting performance of motor vehicles [2]. It is especially important whether the light tester is qualified or not and whether the deviation is large or not. Based on the JJG745-2016 "headlamp testers for motor vehicle ", this paper uses the motor vehicle’s headlamp tester near and far light calibrator as the standard, and evaluates and discusses the uncertainty of measurement error of far light intensity indicator in headlamp testers, so as to provide reference for the calibration of the light tester.
With the rapid development of our country's economy, the number of motor vehicles has continued to grow rapidly, and the safety of driving has become an important issue[1]. The lack of vision and vision of the driver will directly affect the safety of driving. The transmittance meter is used to measure the visible light transmission ratio of the glass in the driver's view area. It is great important whether the indication is accurate or not. In this paper, the standard neutral filter is chosen as the standard, and the uncertainty of the measurement error of transmittance meter is evaluated and discussed.
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