US5717484A
Expired / Lapsed
US
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Position detecting system
Assignee: Moneual Inc
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Filing: 1995-03-17
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Granted: 1998-02-10
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Expires: 2015-03-17
Abstract
Abstract A first light receiving portion and a second light receiving portion are provided on the upper surface of a moving body having driving wheels at an interval of a prescribed distance in a plane. The first light receiving portion and the second light receiving portion rotate around the axis in the vertical direction. On the other hand, a first light emitting portion and a second light emitting portion are provided on the side face of a station serving as a reference station at an interval of a prescribed distance in a plane. The first and second light receiving portions carry out sampling while rotating, so that the quantity of light reception is changed according to the directivities of the first and second light receiving portions. When the peaks of the directivities of the first and second light receiving portions match the direction of the first light emitting portion or the second light emitting portion, the quantity of light reception is maximized. Based on a rotational angle at which the quantity of light reception is maximized, the relative positions and the relative directions of the first and second light receiving portions with respect to the first and second light emitting portions are calculated.
Inventors
- 👤 Takayuki Hamaguchi
- 👤 Nobukazu Kawagoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:53
CPC Classifications
G; G01; G01S; G01S5/00; G01S5/16; G05; G05D; G05D1/00; G05D1/02; G05D1/021; G05D1/0231; G05D1/0268; G05D1/027
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
134 words
A position detecting system for detecting a relative position between a first object and a second object under fluorescent light, comprising: a light emitter provided on said first object, said light emitter providing emission during one cycle of the fluorescent light, stopping emission, and maintaining a non-emitting condition during at least one following cycle of the fluorescent light; a light receiver provided on said second object, said light receiver receiving light from said light emitter in a cycle which is related to the fluorescent light cycle such that the fluorescent light cycle is an integer multiple of the light receiving cycle; and a calculator calculating the relative position based on output of said light receiver, wherein the effect of the fluorescent light is removed by operation of said light emitter and said light receiver.
Claim 2
Dependent Claim
134 words
A position detecting system for detecting a relative position between a first object and a second object under fluorescent light, comprising: a light emitter provided on said first object, said light emitter providing emission during one cycle of the fluorescent light, stopping emission, and maintaining a non-emitting condition during at least one following cycle of the fluorescent light; a light receiver provided on said second object, said light receiver receiving light from said light emitter in a cycle which is related to the fluorescent light cycle such that the fluorescent light cycle is an integer multiple of the light receiving cycle; and a calculator calculating the relative position based on output of said light receiver, wherein the effect of the fluorescent light is removed by operation of said light emitter and said light receiver.
Claim 3
Dependent Claim
31 words
A position detecting system as claimed in claim 1, wherein said calculator calculates a distance and a relative angle between said first object and said second object as the relative position.
Claim 4
Dependent Claim
21 words
A position detecting system as claimed in claim 1, wherein emission of said light emitter is synchronized with the fluorescent light.
Claim 5
Dependent Claim
33 words
A position detecting system as claimed in claim 3, wherein a lag of synchronism between emission of said light emitter and the fluorescent light is corrected after a lapse of a predetermined time.
Claim 6
Dependent Claim
19 words
A position detecting system as claimed in claim 1, further comprising a light receiver detecting the fluorescent light cycle.
Claim 7
Dependent Claim
22 words
A position detecting system as claimed in claim 1, wherein said first object is a moving body which moves on a floor.
Claim 8
Dependent Claim
18 words
A position detecting system as claimed in claim 6, wherein said second object is a station at rest.
Claim 9
Dependent Claim
22 words
A position detecting system as claimed in claim 1, wherein said second object is a moving body which moves on a floor.
Claim 10
Dependent Claim
18 words
A position detecting system as claimed in claim 8, wherein said first object is a station at rest.
Claim 11
Dependent Claim
62 words
A detecting system operating under cyclic fluorescent light, comprising: a light emitter which emits light during even multiple cycles of the fluorescent light; and a light receiver which receives light from said light emitter during a half cycle of a light emitting cycle, wherein the effect of the fluorescent light is removed by operation of said light emitter and said light receiver.
Claim 12
Dependent Claim
62 words
A detecting system operating under cyclic fluorescent light, comprising: a light emitter which emits light during even multiple cycles of the fluorescent light; and a light receiver which receives light from said light emitter during a half cycle of a light emitting cycle, wherein the effect of the fluorescent light is removed by operation of said light emitter and said light receiver.
Claim 13
Dependent Claim
92 words
A detecting system operating under fluorescent light, comprising: a light emitter providing emission during one cycle of the fluorescent light, stopping emission, and maintaining a non-emitting condition during at least one following cycle of the fluorescent light; and a light receiver receiving light from said light emitter in a cycle which is related to the fluorescent light cycle such at the fluorescent light cycle is an integer multiple of the light receiving cycle; wherein the effect of the fluorescent light is removed by operation of said light emitter and said light receiver.
Claim 14
Dependent Claim
92 words
A detecting system operating under fluorescent light, comprising: a light emitter providing emission during one cycle of the fluorescent light, stopping emission, and maintaining a non-emitting condition during at least one following cycle of the fluorescent light; and a light receiver receiving light from said light emitter in a cycle which is related to the fluorescent light cycle such at the fluorescent light cycle is an integer multiple of the light receiving cycle; wherein the effect of the fluorescent light is removed by operation of said light emitter and said light receiver.
Claim 15
Dependent Claim
22 words
A detecting system as claimed in claimed in claim 11, wherein emission of said light emitter is synchronized with the fluorescent light.
Claim 16
Dependent Claim
32 words
A detecting system as claimed in claim 11, wherein a lag of synchronism between emission of said light emitter and the fluorescent light is corrected after a lapse of a predetermined time.
Claim 17
Dependent Claim
18 words
A detecting system as claimed in claim 11, further comprising a light receiver detecting the fluorescent light cycle.
Claim 18
Dependent Claim
158 words
A position detecting system for detecting a relative position between a first object and a second object under cyclic fluorescent light, comprising: a light emitter provided on the first object to emit light in a cyclic manner, the light emitter emitting light for a predetermined period during each light emitting cycle of the light emitter, wherein the light emitting cycle is a multiple of a cycle of the fluorescent light; a light receiver provided on the second object, the light receiver receiving light from the light emitter in a light receiving cycle which is related to the light emitting cycle in a manner such that the light emitting cycle is an integer multiple of the light receiving cycle; and a calculator calculating the relative position of the first and second objects based on an output of the light receiver, wherein the effect of the fluorescent light is removed by operation of the light emitter and the light receiver.
Claim 19
Dependent Claim
158 words
A position detecting system for detecting a relative position between a first object and a second object under cyclic fluorescent light, comprising: a light emitter provided on the first object to emit light in a cyclic manner, the light emitter emitting light for a predetermined period during each light emitting cycle of the light emitter, wherein the light emitting cycle is a multiple of a cycle of the fluorescent light; a light receiver provided on the second object, the light receiver receiving light from the light emitter in a light receiving cycle which is related to the light emitting cycle in a manner such that the light emitting cycle is an integer multiple of the light receiving cycle; and a calculator calculating the relative position of the first and second objects based on an output of the light receiver, wherein the effect of the fluorescent light is removed by operation of the light emitter and the light receiver.
Claim 20
Dependent Claim
22 words
A position detecting system as claimed in claim 15, wherein said predetermined period is as long as one fluorescent light cycle period.
Claim 21
Dependent Claim
21 words
A position detecting system as claimed in claim 15, wherein said predetermined period is shorter than one fluorescent light cycle period.
Claim 22
Dependent Claim
31 words
A position detecting system as claimed in claim 17, wherein said calculator calculates a distance and a relative angle between said first object and said second object as the relative position.
Claim 23
Dependent Claim
39 words
A position detecting system as claimed in claim 17, wherein a lag of synchronism between the emission of light from said light emitter and the cycles of the fluorescent light is corrected after a lapse of a predetermined time.
Claim 24
Dependent Claim
19 words
A position detecting system as claimed in claim 17, further comprising a light receiver detecting the fluorescent light cycle.
Claim 25
Dependent Claim
22 words
A position detecting system as claimed in claim 17, wherein said first object is a moving body which moves on a floor.
Claim 26
Dependent Claim
18 words
A position detecting system as claimed in claim 21, wherein said second object is a station at rest.
Claim 27
Dependent Claim
22 words
A position detecting system as claimed in claim 17, wherein said second object is a moving body which moves on a floor.
Claim 28
Dependent Claim
18 words
A position detecting system as claimed in claim 23, wherein said first object is a station at rest.
Claim 29
Dependent Claim
112 words
A detecting system operating under cyclic fluorescent light, comprising: a light emitter emitting light for a predetermined time which is equal to or less than one cycle of the fluorescent light, and maintaining a non-emitting condition during a predetermined time period which is equal to or greater than one cycle of the fluorescent light; and a light receiver receiving light from the light emitter in a cycle which is related to the light emitting cycle in a manner such that the light emitting cycle is an integer multiple of the light receiving cycle, wherein the effect of the fluorescent light is removed by operation of the light emitter and the light receiver.
Claim 30
Dependent Claim
112 words
A detecting system operating under cyclic fluorescent light, comprising: a light emitter emitting light for a predetermined time which is equal to or less than one cycle of the fluorescent light, and maintaining a non-emitting condition during a predetermined time period which is equal to or greater than one cycle of the fluorescent light; and a light receiver receiving light from the light emitter in a cycle which is related to the light emitting cycle in a manner such that the light emitting cycle is an integer multiple of the light receiving cycle, wherein the effect of the fluorescent light is removed by operation of the light emitter and the light receiver.
Claim 31
Dependent Claim
38 words
A detecting system as claimed in claim 25, wherein a lag of synchronism between the emission of light from said light emitter and the cycles of the fluorescent light is corrected after a lapse of a predetermined time.
Claim 32
Dependent Claim
18 words
A detecting system as claimed in claim 25, further comprising a light receiver detecting the fluorescent light cycle.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-02-09 | 2001-08-11 | 2002-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-02-09 | 2005-08-11 | 2006-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-02-09 | 2009-08-11 | 2010-02-10 | $7700.00 | Window Closed / Lapsed |