We are developing a multilateration system at a reasonable cost that aims at an accuracy better than 50 µm determined with a consistent metrological approach. In this context, an absolute distance meter, developed in-house, is used as a unique telemetric system to feed the different measurement heads of the multilateration system through a network of optical fibers. The uncertainty contribution for a distance measurement of the telemetric system itself, in a controlled environment, is from 2 µm up to 100 m (k = 1). In this paper, the uncertainty contribution due to mechanical designs of the measurement heads and the target is estimated: the gimbal mechanisms we have designed are presented and their sources of error are identified, experimentally quantified, and minimized. At the end, we demonstrate that the current design of the measurement head does not induce errors higher than 2 µm on the measured distances and the design of the target does not induce errors higher than 9 µm.

中文翻译：

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光学多点定位系统原型的机械误差评估

我们正在以合理的成本开发一种多点测量系统，旨在通过一致的计量方法确定优于 50 µm 的精度。在这种情况下，内部开发的绝对测距仪用作独特的遥测系统，通过光纤网络为多点定位系统的不同测量头供电。在受控环境中，遥测系统本身的距离测量的不确定性贡献从 2 µm 到 100 m (k = 1)。在本文中，估计由于测量头和目标的机械设计造成的不确定性贡献：介绍了我们设计的万向节机构，并确定了它们的误差来源，通过实验量化并最小化。在最后，