Double position sensitive detectors (PSDs) based measurement system of trajectory tracking of a moving target

Abstract

Purpose

The purpose of this paper is to achieve the trajectory tracking measurement of a moving target based on double position sensitive detectors (PSDs).

Design/methodology/approach

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.

Findings

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.

Originality/value

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.

Citation

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