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    • 9. 发明申请
    • POSITION ENCODER USING STATISTICALLY BIASED PSEUDORANDOM SEQUENCE
    • 使用统计偏移PSEUDORANDOM序列的位置编码器
    • WO02001160A1
    • 2002-01-03
    • PCT/AU2001/000743
    • 2001-06-22
    • G01D5/249G01D5/347H03M1/28H03M1/24
    • G01D5/34792G01D5/2454G01D5/2495G01D5/3473H03M1/282
    • A position sensor encodes absolute position via n consecutive members of a pseudorandom sequence of bits, where each bit (30a-30k) comprises a region of high transmission or reflectivity adjacent to a region of low transmission or reflectivity. The pseudorandom sequence is chosen such that every series of n consecutive bits (30a-30k) in the sequence is predominantly formed from a predetermined bit value (1 or 0). The light transmitted or reflected from the series is therefore detected as a substantially periodic intensity pattern (42), which can be processed via Fourier analysis to yield an accurate interpolation of relative position. An example is given of a pseudorandom sequence, which can be represented as a cyclic Manchester code, in which at least 8 members of every series of 11 consecutive bits has a bit value of 1.
    • 位置传感器通过伪随机序列序列的n个连续成员对绝对位置进行编码,其中每个位(30a-30k)包括与低传输或反射率区域相邻的高传输或反射率的区域。 选择伪随机序列使得序列中的n个连续位(30a-30k)的每个序列主要由预定位值(1或0)形成。 因此,从串联发射或反射的光被检测为基本上周期性的强度图案(42),其可以通过傅里叶分析进行处理,以产生相对位置的精确插值。 给出一个伪随机序列的例子,可以表示为循环曼彻斯特码,其中11个连续位的每个序列中的至少8个成员具有位值1。