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    • 14. 发明申请
    • POSITION SENSOR
    • 位置传感器
    • WO1991010288A2
    • 1991-07-11
    • PCT/GB1990002004
    • 1990-12-21
    • ADRIAN MARCH LIMITEDMARCH, Adrian, Anthony, Cecil
    • ADRIAN MARCH LIMITED
    • H03M01/22
    • H03M1/282G01D5/2495G01D5/36G01G3/12G01G9/00
    • A position sensor has a detector fixed to a first body, the detector having sensitive elements defining a track (10) of such elements. A scale being e.g. the optical image of a part of a second body, is caused to impinge on the detector. The scale has a track (6) of indicia (i.e. a bar pattern) and the sensitive elements of the track (10) of the detector detect their overlapping with a corresponding one or more of the indicia and generate an output depending on that overlapping. The indicia of the track (6) of indicia define two patterns (A, B) arranged in a plurality of successive sections (8). One pattern (A) is fixed for all sections (8) and the other pattern (B) varies according to a predetermined rule (e.g. cyclically) from section (8) to section (8). The track (10) of the detector detects a length of the track (6) of indicia corresponding approximately to the length of a section (8), as a result, the output of the detector can be processed to determine the relative positions of the first and second bodies, from detection of the relative position of the detector and the fixed pattern together with the relationship between the two patterns.
    • 位置传感器具有固定到第一主体的检测器,检测器具有限定这些元件的轨道(10)的敏感元件。 例如, 导致第二体的一部分的光学图像撞击检测器。 刻度具有标记的轨迹(6)(即条形图案),并且检测器的轨道(10)的敏感元件检测它们与对应的一个或多个标记的重叠,并根据该重叠产生输出。 标记的轨道(6)的标记定义了布置在多个连续部分(8)中的两个图案(A,B)。 一个图案(A)对于所有部分(8)是固定的,另一个图案(B)根据从部分(8)到部分(8)的预定规则(例如循环地)而变化。 检测器的轨道(10)检测出与部分(8)的长度相对应的标记的轨迹(6)的长度,结果,可以处理检测器的输出以确定检测器的相对位置 检测器和固定图案的相对位置以及两个图案之间的关系的第一和第二主体。