Abstract
In a measurement, measurement is influenced by uncertainties, part of which is contributed by the measurement instrument itself. We develop a new calibration method for laser velocimetry mainly for application in flow measurements. With the new calibration method, the measurement uncertainty can be quantified and it is also reduced compared to some former methods. In the former methods, calibration uncertainty was dominated by that of the calibration orbit radius, which is not accessible directly. Our new method solves this issue by utilizing a linear relationship between measurement outputs to the rotating radii of a calibration disk. We have used multiple pinholes to realize the calibration and confirmed its performance. In the present study, we propose a new realization of the calibration method using multiple points along a slit instead of multiple pinholes. We report the initial result of the performance evaluation based on the slip method. The functionality of the new realization was confirmed and the performance was investigated through an experiment. The performance is expected to be improved furthermore.
