Using an Optical Motion Sensor for Visualization and Analysis of Maintenance Work on Semiconductor Manufacturing Equipment

Kagaya, Munehito; Tanaka, Satoshi; Matsui, H.; Moriya, Tsuyoshi

doi:10.1109/tsm.2017.2750719

Cited by 6 publications

(1 citation statement)

References 20 publications

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“…The conventional optical arc detection method is distorted by strong sunlight or other environmental lights, and it is hard to distinguish the light of pantograph–catenary arc from interference. 12,13 It can be seen that the arc detection using the characteristics of current and light has some disadvantages, especially in the pantograph–catenary system. Due to the complex environment of the pantograph–catenary system, the arc detection would be affected easily by external factors.…”

Section: Introductionmentioning

confidence: 99%

A novel method for detecting the pantograph–catenary arc based on the arc sound characteristics

Wei

Liang

Yang

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part F:

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In recent years, the speed and the current transmission density of high-speed railways are increased. As a result, the rate of the occurrence of pantograph–catenary arc also increases, which directly influences the service performance of the pantograph–catenary system. The detection and identification of the pantograph–catenary arc is of great significance for evaluating the off-line level to ensure the safe operation of the pantograph–catenary system. The currently used conventional optical arc detection method would be distorted by strong sunlight or other environmental lights in the actual operation, which would affect the accuracy of detection. On the contrary, the arc sound signal is not affected by the diurnal variation and can be easily obtained; it can also be distinguished well from other interfering sounds. In this paper, a new method that uses the arc sound is proposed to realize the effective detection of the pantograph–catenary arc. The frequency spectrum and the intensity characteristics of the pantograph–catenary arc sound are analyzed. The results show that the frequency band of the arc sound signal is wide and mainly gets distributed at 5–17 kHz. The curve of the sound waveform is drawn by calculating the short-time average energy, which is used to obtain the arc’s starting time, duration, and intensity, for calculating the off-line rate.

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Section: Introductionmentioning

confidence: 99%