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1. 发明申请

US20070179738A1 DIGITAL METHOD AND APPARATUS FOR SENSING POSITION WITH A LINEAR VARIABLE DIFFERENTIAL TRANSFORMER 有权
标题翻译：用线性可变差分变换器传感位置的数字方法和装置
公开(公告)号：US20070179738A1
公开(公告)日：2007-08-02
申请号：US11341738
申请日：2006-01-27
申请人： John Stolan
发明人： John Stolan
IPC分类号： G01B21/02 , G01B7/14 , G01B7/02
CPC分类号： G01D5/2291
摘要： An apparatus and method for determining a linear position from a linear variable differential transformer (LVDT) including a primary coil driven by an excitation signal, and two secondary coils coupled to two correlated signals. The method includes converting the correlated signals to a digital estimate, for each of the correlated signals, and evaluating an amplitude of the correlated signals to determine the linear position. The process of converting the correlated signals comprises comparing the correlated signal to an analog feedback signal to generate a comparison result and incrementally adjusting the digital estimate in response to sampling the comparison result at an estimation frequency. The converting process also includes converting the digital estimate to the analog feedback signal, collecting a digital estimate history at a sample frequency that is a binary multiple of the excitation frequency, and analyzing the digital estimate history to determine the amplitude substantially near the excitation frequency.
摘要翻译：一种用于从包括由激励信号驱动的初级线圈的线性可变差动变压器（LVDT）确定线性位置的装置和方法，以及耦合到两个相关信号的两个次级线圈。该方法包括将相关信号转换为数字估计，针对每个相关信号，以及评估相关信号的幅度以确定线性位置。转换相关信号的过程包括将相关信号与模拟反馈信号进行比较，以产生比较结果，并且响应于在估计频率上对比较结果进行采样来递增地调整数字估计。转换过程还包括将数字估计转换为模拟反馈信号，以作为激励频率的二进制倍数的采样频率收集数字估计历史，并分析数字估计历史以确定实质上接近激励频率的幅度。

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