EP0552001A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A sensor
Assignee: Techno Excel KK
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Filing: 1993-01-11
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Granted: —
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Expires: 2013-01-11
Abstract
Abstract A sensor of the present invention comprises: a plurality of planar zigzag coils (10a, 10b) being provided on substrates (40, 42, 44), the planar zigzag coils having same coil pitch and being formed into zigzag shape in a first direction, the planar zigzag coils (10a,10b) being capable of relatively moving in the first direction, the planar zigzag coils (10a, 10b) including a first planar zigzag coil (10a), which is a primary coil, and a second planar zigzag coil (10b), which is a secondary coil; magnetizing means (12, 14) for magnetizing the first planar zigzag coil (10a); first detecting means (16) for detecting induced electromotive force, which is induced in the second planar zigzag coil (10b) by the first planar zigzag coil (10a) magnetized; and second detecting means (28) for detecting displacement length between the first planar zigzag coil (10a) and the second planar zigzag coil (10b) on the basis of the induced electromotive force in the second planar zigzag coil (10b). Therefore, the sensor is capable of having a wide sensing range in which the first planar zigzag coil (10a) induces the second planar zigzag coil (10b).
Inventors
- 👤 Takanori c/o Techno Excel K.K. Kobayashi
- 👤 Yoshifumi c/o Techno Excel K.K. Nagano
- 👤 Kiyohito Yamasawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 03:29
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/16; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/20; G01D5/204; G01D5/2073
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
158 words
A sensor, comprising: a plurality of planar zigzag coils (10a, 10b) being provided on substrates (40, 42, 44), said planar zigzag coils having same coil pitch and being formed into zigzag shape in a first direction, said planar zigzag coils (10a, 10b) being capable of relatively moving in the first direction, said planar zigzag coils (10a, 10b) including a first planar zigzag coil (10a), which is a primary coil, and a second planar zigzag coil (10b), which is a secondary coil; magnetizing means (12, 14) for magnetizing said first planar zigzag coil (10a); first detecting means (16) for detecting induced electromotive force, which is induced in said second planar zigzag coil (10b) by said first planar zigzag coil (10a) magnetized; and second detecting means (28) for detecting displacement length between said first planar zigzag coil (10a) and said second planar zigzag coil (10b) on the basis of the induced electromotive force in said second planar zigzag coil (10b).
Claim 2
Dependent Claim
38 words
The sensor according to claim 1, wherein said second detecting means (28) detects the displacement length on the basis of detecting a predetermined value of the induced electromotive force, which is detected by said first detecting means (16).
Claim 3
Dependent Claim
34 words
The sensor according to claim 1 or 2 further comprising third detecting means (24) for detecting relative moving speed between said planar zigzag coils (10a, 10b) on the basis of the displacement length therebetween.
Claim 4
Dependent Claim
31 words
The sensor according to claim 3, further comprising fourth detecting means (26) for detecting relative acceleration between said planar zigzag coils (10a, 10b) on the basis of the moving speed therebetween.
Claim 5
Dependent Claim
38 words
The sensor according to any preceding claim further comprising a detecting coil (48) for detecting an absolute position of said first planar zigzag coil (10a), said detecting coil (48) being induced by said first planar zigzag coil (10a).
Claim 6
Dependent Claim
26 words
The sensor according to claim 5, wherein the length of said detecting coil (48) is equal to the width of said second planar zigzag coil (10b).
Claim 7
Dependent Claim
64 words
The sensor according to any preceding claim wherein a face of said first planar zigzag coil (10a), which is an opposite face facing to said second planar zigzag coil (10b), is covered with a magnetizable material, a face of said second planar zigzag coil (10b), which is an opposite face facing to said first planar zigzag coil (10a), is covered with a magnetizable material.
Claim 8
Dependent Claim
34 words
The sensor according to any preceding claim further comprising output means (30) for outputting at least the detected displacement length between said first planar zigzag coil (10a) and said second planar zigzag coil (10b).
Claim 9
Dependent Claim
217 words
A sensor, comprising: a first sensor section and a second sensor section, each of which has: a plurality of planar zigzag coils (100X, 100Y, 102X, 102Y) being provided on substrates (40, 42, 44), said planar zigzag coils (100X, 100Y, 102X, 102Y) having same coil pitch and being formed into zigzag shape in one direction, said planar zigzag coils (100X, 100Y, 102X, 102Y) being capable of relatively moving in the one direction, said planar zigzag coils (100X, 100Y, 102X, 102Y) including a first planar zigzag coil (100X, 100Y), which is a primary coil, and a second planar zigzag coil (102X, 102Y), which is a secondary coil; magnetizing means (104, 106X, 106Y) for magnetizing said first planar zigzag coil (100X, 100Y); and first detecting means (108X, 108Y) for detecting induced electromotive force, which is induced in said second planar zigzag coil (102X, 102Y) by said first planar zigzag coil (100X, 100Y) magnetized, wherein the forming directions of said planar zigzag coils (100X, 100Y, 102X, 102Y) of each sensor section are mutually perpendicular; and second detecting means (116) for detecting each displacement length between said first planar zigzag coil (100X, 100Y) and said second planar zigzag coil (102X, 102Y) of each sensor section on the basis of the induced electromotive force in said second planar zigzag coil (102X, 102Y) thereof.
Claim 10
Dependent Claim
185 words
A sensor, comprising: a first sensor section (200), a second sensor section (202) and a third sensor section (202), each of which has: a plurality of planar zigzag coils being provided on substrates, said planar zigzag coils having same coil pitch and being formed into zigzag shape in one direction, said planar zigzag coils being capable of relatively moving in the one direction, said planar zigzag coils including a first planar zigzag coil, which is a primary coil, and a second planar zigzag coil, which is a secondary coil; magnetizing means for magnetizing said first planar zigzag coil; and first detecting means for detecting induced electromotive force, which is induced in said second planar zigzag coil by said first planar zigzag coil magnetized, wherein the forming directions of said planar zigzag coils of each sensor section (200, 202, 204) are perpendicular; and second detecting means (116) for detecting each displacement length between said first planar zigzag coil and said second planar zigzag coil of each sensor section (200, 202, 204) on the basis of the induced electromotive force in said second planar zigzag coils thereof.
References Cited (Backward Citations)
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