The purpose of this paper is to achieve the trajectory tracking measurement of a moving target based on double position sensitive detectors (PSDs).
In this paper, first, a double PSD-based measurement system including hardware system and software system is built up. Then, the working principle is studied to calculate parameters, and calibration experience is conducted. Finally, this double PSD-based measurement system is used to test angular displacement and axial displacement on the tool magazine and automatic tool changer.
In the experiment, the maximum position error of a space point based on double PSD measurement system is 0.8566 mm, and the average error is 0.4716 mm. These results show that the built double PSD-based measurement system of trajectory tracking of a moving target is reasonable.
Combining the characteristics of the PSD and principles of binocular visual measurement, a non-contact three-dimensional measuring system based on double PSDs is developed. The designed double-based measurement system is quite suitable for measurement of a fast-changing illuminant or in the case that the tracking accuracy is not tight.
The research is supported by the high-grade CNC machine tool and the basic equipment manufacturing industry major science and technology project (No. 2011ZX04011-022).
Lu, X., Jia, Z., Hu, X. and Wang, W. (2017), "Double position sensitive detectors (PSDs) based measurement system of trajectory tracking of a moving target", Engineering Computations, Vol. 34 No. 3, pp. 781-799. https://doi.org/10.1108/EC-08-2015-0214
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