Patent EP0039921A2 successfully refreshed from Google Patents.
EP0039921A2
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EP
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Encoder device and method of use of it
Assignee: Topcon Corp
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Filing: 1981-05-07
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Granted: —
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Expires: 2001-05-07
Abstract
Abstract An encoder device is characterized by comprising a code plate (1) which is divided into a plurality of blocks (N 1 ,..., Np, .., N n-1 , N n ) along the longitudinal direction, in each of which is encoded address information consisting of code sequences arranged in a row along the longitudinal direction and representing the absolute address of the respective blocks; a line sensor (4) having a plurality of sensor elements arranged in a row for reading the information stored in the code plate; and means (6) for processing an electric output signal from the line sensor (4) to read the block address.
Inventors
- 👤 Masana Minami
- 👤 Fumio Ohtomo
- 👤 Kazuaki Kimura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 08:31
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12; G01D5/244; G01D5/249; G01D5/2492; H; H03; H03M; H03M1/00; H03M1/12; H03M1/22; H03M1/24; H03M1/28; H03M1/30; H03M1/303; H03M1/305; H03M1/60
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
105 words
An encoder device characterized by comprising a code plate (1) which is divided into a plurality of blocks (N 1 , ..., N , ..., N n-1 , N ) along the longitudinal direction, in each of which is encoded address information consisting of code sequences arranged in a row along the longitudinal direction and representing the absolute address of the respective blocks; a line sensor (4) having a plurality of sensor elements arranged in a row for reading the information stored in said code plate (1); and means for processing an electric output signal from said line sensor (4) to read said block address.
Claim 2
Dependent Claim
105 words
An encoder device characterized by comprising a code plate (1) which is divided into a plurality of blocks (N 1 , ..., N , ..., N n-1 , N ) along the longitudinal direction, in each of which is encoded address information consisting of code sequences arranged in a row along the longitudinal direction and representing the absolute address of the respective blocks; a line sensor (4) having a plurality of sensor elements arranged in a row for reading the information stored in said code plate (1); and means for processing an electric output signal from said line sensor (4) to read said block address.
Claim 3
Dependent Claim
59 words
An encoder device according to claim 1, characterized in that an absolute position to a precision of at least one pitch of said line sensor (4) is obtained by detecting a reference position of each of said blocks (N 1 , ..., N p , ..., N n-1 , N ) from said block address information which is encoded.
Claim 4
Dependent Claim
59 words
An encoder device according to claim 1, characterized in that an absolute angle to a precision of at least one pitch of said line sensor (4) is obtained by detecting a reference position of each of said blocks (N 1 , ..., N p , ..., N n-1 , N ) from said block address information which is encoded.
Claim 5
Dependent Claim
84 words
An encoder device accroding to claim 1, characterized in that said block address information and characteristic marker information representing a reference position of each block are encoded in each block (N 1 , ..., Np, ..., N n-1 , N ) of said code plate (1), and an absolute position to a precision of at least one pitch of said line sensor (4) is obtained by reading said block address information and said characteristic marker information from an output of said line sensor (4).
Claim 6
Dependent Claim
88 words
An encoder device according to claim 1, characterized in that said block address information and characteristic marker information representing a reference position of each block (N 1 , ..., N p , ..., N n-1 , N n ) are encoded in each block of said code plate (1), and an absolute angle to a precision of at least one pitch of said line sensor (4) may be obtained by reading said block address information and said characteristic marker information from an output of said line sensor (4).
Claim 7
Dependent Claim
54 words
An encoder according to claims 2 or 4, characterized in that an absolute position to a precision of at least one pitch of said line sensor (4) is obtained by obtaining distances from said detected reference positions of said blocks to a reference bit on said line sensor which is arbitrarily determined in advance.
Claim 8
Dependent Claim
55 words
An encoder according to claim 3 or 5, characterized in that means for obtaining an absolute angle to a precision of at least one pitch of said line sensor (4) obtains angles from said detected reference positions of said blocks to a reference bit on said line sensor (4) which is arbitrarily determined in advance.
References Cited (Backward Citations)
No citation records indexed.
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