公开(公告)号：WO1996023198A1

公开(公告)日：1996-08-01

申请号：PCT/US1995016815

申请日：1995-12-22

Applicant: BOURNS, INC.

Inventor： BOURNS, INC. ,  BRANDESTINI, Marco

IPC: G01D05/249

CPC classification number: G01D5/2492 ,  H03M1/285

Abstract: An encoder to convert absolute angular or linear position to digital information, and a method to derive code sequences to produce such encoders. A sensor-detectable code, such as a binary, ternary or quaternary code, is arranged along a single track (11), and sensors (21, 22, 23, 24) are positioned in a prescribed manner along the track to sense the code. The sensors may be mechanical contacts, optical detectors, magnetic detectors, or capacitive detectors. The sensors (21, 22, 23, 24) and the information elements (12, 13, 14) of the code are arranged such that the digital output sequence produced by the sensors (as the track is moved relative to the sensors) is Gray-encoded, and such that a high level of code efficiency is obtained. Codes sequences are derived using a method which involves the generation and ordering of necklaces.

Abstract translation: 将绝对角度或线性位置转换为数字信息的编码器，以及导出代码序列以产生这种编码器的方法。 沿着单个轨道（11）布置诸如二进制，三进制或四进制代码的传感器可检测代码，并且沿着轨道以规定的方式定位传感器（21,22,23,24）以感测代码 。 传感器可以是机械接触件，光学检测器，磁性检测器或电容式检测器。 代码的传感器（21,22,23,24）和信息元件（12,13,14）被布置成使得由传感器产生的数字输出序列（当轨道相对于传感器移动时）为灰色 并且使得获得高水平的代码效率。 代码序列使用涉及项链生成和排序的方法得出。

公开(公告)号：WO1996019872A1

公开(公告)日：1996-06-27

申请号：PCT/US1995016972

申请日：1995-12-19

Applicant: BOURNS INC.

Inventor： BOURNS INC. ,  BRANDESTINI, Marco

IPC: H03M01/24

CPC classification number: G01D5/2497 ,  G01D5/2492 ,  G01D5/25 ,  H03M1/282 ,  H03M1/285

Abstract: An absolute position encoder converts absolute mechanical position to a digital output value. A single-track, rotary embodiment of the encoder includes several conductive pick-up segments (21a, 22a, 23a, 24a, 25a) that are symmetrically arranged along a circular pick-up track, with each pick-up segment connected to a respective output terminal (21, 22, 23, 24, 25). A metallic rotor (27) of the encoder comprises a plurality of contacts (37) that are positioned in alignment with the pick-up track such that the contacts slidably contact different pick-up segments as the rotor is rotated. The contacts on the rotor are conductively interconnected, and are maintained at a common voltage via a sliding connection between the rotor and a collector ring (26a). The output of the encoder is a cyclical Gray code sequence, which may be used in combination with a ROM look-up table to accurately track position. Linear and multi-track embodiments are also disclosed.

Abstract translation: 绝对位置编码器将绝对机械位置转换为数字输出值。 编码器的单轨，旋转实施例包括沿着圆形拾取轨道对称布置的几个导电拾取段（21a，22a，23a，24a，25a），每个拾取段连接到相应的 输出端子（21,22,23,24,25）。 编码器的金属转子（27）包括多个触点（37），其定位成与拾取轨道对准，使得当转子旋转时，触头可滑动地接触不同的拾取部分。 转子上的触点导电互连，并通过转子和集电环（26a）之间的滑动连接保持在公共电压。 编码器的输出是周期性的格雷码序列，可以与ROM查找表组合使用以准确地跟踪位置。 还公开了线性和多轨道实施例。