Vertical coordinates measurement based on intersection laser screens

Bin Zhang; Zhaoba Wang; Donge Zhao; Ji Liu

doi:10.1117/12.2205252

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8 October 2015 Vertical coordinates measurement based on intersection laser screens

Bin Zhang, Zhaoba Wang, Donge Zhao, Ji Liu

Author Affiliations +

Proceedings Volume 9677, AOPC 2015: Optical Test, Measurement, and Equipment; 96772Q (2015) https://doi.org/10.1117/12.2205252
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China

Abstract

In order to solve the weakness of traditional vertical target coordinate measurement, such as complex structure, inconvenient debugging and difficult to form a large area target, a method based on intersection laser screens was proposed. The effective area of was constituted by the intersection of two fan-shaped laser screens. Photodiode (PD) array was used to measure the intensity of laser light. When the projectile passes through the laser screens, the corresponding PDs receive signal. After signal processing and adaptive threshold comparator circuit processing, the signal is transmitted to PC to calculate the projectile target coordinate. The calculation method of feature point and the calculation process of coordinate were described in detail. Error distribution in effective area was analyzed. Experiment was carried out by using simulating projectile and the principle prototype whose effective target area is 1m×1m. The result shows that the precision of location measurement is up to 2mm. The method has the advantages of simple structure, convenient debugging. It is easy to construct a larger area target, and the maximum effective area can reach to 6m×6m.

Citation Download Citation

Bin Zhang, Zhaoba Wang, Donge Zhao, and Ji Liu "Vertical coordinates measurement based on intersection laser screens", Proc. SPIE 9677, AOPC 2015: Optical Test, Measurement, and Equipment, 96772Q (8 October 2015); https://doi.org/10.1117/12.2205252

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