在线检测； 预行程误差； BP神经网络； 误差预测； 误差补偿；

On-line inspecting system; Pre-travel error; BP neural network; Error prediction; Error compensation;

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介绍一种适用于大行程位移检测，并具有误差补偿功能的智能型检测系统。

This paper presents an intelligence measurement system of long displacement with error compensation ability.

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根据测头误差产生的机理，通过对测头不同触发区间触发力的分析，得出不同触发区间预行程量的计算公式。

All kinds of error sources will effect the on-machine measure system precision were introduced in the forth part of the paper, especially the error from the trigger probe.

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