Methods for solar access measurement

• US 9,697,644 B2
• Filed: 03/04/2014
• Issued: 07/04/2017
• Est. Priority Date: 12/28/2005
• Status: Active Grant

• Current Assignee: Fluke Corporation (Fortive Corp.)
• Original Assignee: Solmetric Corporation (Fortive Corp.)
• Inventors: MacDonald, Willard S., MacDonald, Robert
• Primary Examiner(s): Hellner, Mark
• Application Number:
  US14/197,210
• Publication Number:
  US 20140176543A1
• Time in Patent Office: 1,218 Days
• Field of Search: 345420
• CPC Class Codes: G01J 1/0266 Field-of-view determination; Aiming or pointing of a photometer; Adjusting alignment; Encoding angular position; Size of the measurement area; Position tracking; Photodetection involving different fields of view for a single detector
• CPC Class Codes: G01J 1/4228 arrangements with two or more detectors, e.g. for sensitivity compensation
• CPC Class Codes: G01S 3/7868 using horizon sensors
• CPC Class Codes: G01W 1/12 Sunshine duration recorders measuring intensity of sunshine G01J
• CPC Class Codes: G06T 17/05 Geographic models
• CPC Class Codes: Y02B 10/10 Photovoltaic [PV]

Abstract

A method for determining solar access at a position includes: obtaining an image of a horizon that includes a skyline; determining the azimuth orientation and the inclination of the obtained image; and determining solar access based on the skyline within the obtained image, the measured azimuth orientation and inclination of the obtained image, and a position associated with the image of the horizon. Other features and embodiments relating to solar access measurement are disclosed.

Claims

1. A non-transitory computer-readable medium with an executable computer program comprising an ordered listing of executable instructions stored thereon, wherein the computer program, when executed, instructs a processor to perform a method, the method comprising:

obtaining an image of a horizon that includes a skyline, wherein said image is obtained by a virtual image sensor of a 3D CAD model digitally representing a real-world open area;

determining the azimuth orientation and the inclination of the obtained image; and

determining solar access based on the skyline within the obtained image, the measured azimuth orientation and inclination of the obtained image, and a position associated with the image of the horizon.

2. The non-transitory computer-readable medium of claim 1 wherein the image from the 3D CAD model includes a virtual horizon and a virtual skyline.

3. The non-transitory computer-readable medium of claim 2 wherein the virtual horizon is a representation of a real-world horizon at the position of the obtained image.

4. The non-transitory computer-readable medium of claim 1 wherein the virtual image sensor is embodied in a software algorithm.

5. The non-transitory computer-readable medium of claim 1 wherein said image is obtained from at least a portion of one or more images stored on a computerized database.

6. The non-transitory computer-readable medium of claim 1 wherein said image is obtained by a skyline detector configured to capture an image of an open space, wherein the open space includes a 2D rendering of a 3D CAD model.

7. The non-transitory computer-readable medium of claim 6 wherein the skyline detector is embodied in a computerized algorithm.

8. A method for determining solar access, comprising:

within a computerized system comprising a 3D CAD model configured to obtain an image of a virtual horizon that includes a virtual skyline at a predetermined virtual position, wherein said virtual horizon corresponds to a real world horizon, said virtual skyline corresponds to a real world skyline, and said virtual position corresponds to a real world position;

obtaining an image of the virtual horizon and the virtual skyline associated therewith;

determining the azimuth orientation and inclination of the obtained image; and

processing the obtained image to locate the skyline in the obtained image; and

determining solar access based on the virtual skyline within the obtained image, the measured azimuth orientation and inclination of the obtained image, and the position associated with the image.

9. The method of claim 8, further comprising:

determining paths of the sun throughout a range of times of day and days of year for a particular latitude of the predetermined location; and

determining the amount of solar radiation that will impinge the predetermined location throughout the range.