发明名称 |
Optical position sensor |
摘要 |
An optical position sensor comprises a linearity correction circuit 20 having ROM 22 in which a corresponding table between compensation values and respective rotational angular position of a rotational disk 51. The compensation values are obtained such that an actual relationship is measured between the rotational angular positions of the rotational disk 51 and the output B of a semiconductor position sensing device 54, deviation of the output B of the device 54 from a predetermined linearity relationship (A) is calculated, and compensation values are determined for eliminating the deviation of the output B of the device 54 at respective rotational angular positions of the rotational disk 51. The linearity correction circuit 20 retrieves a compensation value E from ROM 22 based on the output B of the device 54, and compensates the output A so as to produce the sensing output E which has a linearity relationship to the rotational angle of the rotational disk 51.
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申请公布号 |
US5973320(A) |
申请公布日期 |
1999.10.26 |
申请号 |
US19970988535 |
申请日期 |
1997.12.10 |
申请人 |
HARMONIC DRIVE SYSTEMS, INC. |
发明人 |
MARUYAMA, TOSHIKI;AKAHANE, AKIRA;ASAWA, HIDEO |
分类号 |
G01D5/347;G01B11/26;G01D5/34;(IPC1-7):G01D5/34 |
主分类号 |
G01D5/347 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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