US4719344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for measuring amount of solar radiation received directly
Assignee: Eko Instruments Trading Co Ltd
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Filing: 1986-08-21
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Granted: 1988-01-12
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Expires: 2006-08-21
Abstract
Abstract A method for measuring the amount of direct solar radiation and an apparatus according to the method. The invention provides a light sensor which rotates at a constant speed while scanning the sky including the sun. The differential coefficient of the radiation received is obtained from the output of the light-receiving element, thus substantially eliminating the scattered light component from the output. The preferred embodiment of the light-receiving element is a pyroelectric detector.
Inventors
- 👤 Tozawa Hiroyuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:42
CPC Classifications
G; G01; G01J; G01J1/00; G01J5/00; G01J5/10; G01J5/34; G01J1/42; G01J2001/4266; G01J2001/4271
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
76 words
A method for measuring the amount of direct solar radiation, comprising the steps of: rotating a light sensor at a constant speed in a manner such that the light sensor scans the sky including the sun so as to receive both direct and scattered components of solar radiation; and obtaining the differential coefficient of electric outputs from the light sensor with respect to time so as to substantially eliminate the scattered component of the radiation received.
Claim 2
Independent Claim
76 words
A method for measuring the amount of direct solar radiation, comprising the steps of: rotating a light sensor at a constant speed in a manner such that the light sensor scans the sky including the sun so as to receive both direct and scattered components of solar radiation; and obtaining the differential coefficient of electric outputs from the light sensor with respect to time so as to substantially eliminate the scattered component of the radiation received.
Claim 3
Dependent Claim
14 words
A method according to claim 1, wherein the light sensor is a pyroelectric detector.
References Cited (Backward Citations)
US4262195A
Cited
US4491727A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-11 | 1991-07-13 | 1992-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-11 | 1995-07-13 | 1996-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-11 | 1999-07-13 | 2000-01-12 | $7700.00 | Window Closed / Lapsed |