Method and system for simulating the solar cycle

Details Method and system for simulating the solar cycle Method and system for simulating the solar cycle

1999-01-07

2001-04-10

Poon, Peter M. (Department: 3644)

Plant husbandry

Greenhouse, apparatus or method

Reexamination Certificate

active

06212823

ABSTRACT:

FIELD OF THE INVENTION
The invention relates to devices and methods which simulate the natural cycle of the sun. Specifically, the invention relates to devices and methods which reproduce the daily and yearly solar cycle and other environmental conditions.
SUMMARY OF THE INVENTION
It is a principle object of the invention to provide an algorithm that approximates the yearly solar cycle.
It is another object of the invention to provide an algorithm for calculating the amount of daily solar radiation over a year of a particular location which is adjustable for latitude of the location.
It is still another object of the invention to provide a system that senses the moisture level of the soil and is able to provide the proper moisture adjustments for the soil.
It is a further object of the invention to provide a system where the user can monitor data concerning the soil such as its pH, alkaline value, temperature and nutrient condition.
It is another object of the invention to provide an algorithm that calculates the solar cycle beginning on the winter solstice.
It is still another object of the invention to provide an algorithm which provides five seasonal sections creating the four seasonal changes.
It is yet another object of the invention to provide an algorithm that calculates the solar cycle with the algorithm aligning on the winter solstice yet allowing the user to initialize the algorithm to start at any point in time along the yearly cycle.
Still another object of the invention is to provide an algorithm which provides five seasonal sections creating the four seasonal changes which allows the algorithm to align on the point of allegorical origin, the winter solstice.
It is a further object of the invention to provide a system that incorporates methods of stimulating plant growth.
It is yet another object of the invention to provide a system that reconstructs the duration and intensity of the daily solar cycle in real time.
It is still another object of the invention to provide a system that is compact in size and easy to use.
It is still another object of the invention to provide a system where the soil moisture level can be easily measured and the result displayed to the user.
These and other objects are accomplished in a system for simulating the lighting cycle of the sun comprising means for obtaining a set of inflection points on a solar lighting cycle and obtaining the annual minimum sunlight value for a location at a predetermined latitude; means for reconstructing the daily and yearly solar cycle based about said set of inflection point and said minimum yearly value; means for determining the lighting period based upon said daily and yearly cycles; and means for activating a lighting device for the determined lighting period.


REFERENCES:
patent: 6000170 (1999-12-01), Davis
patent: 6079152 (2000-06-01), Hou

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