Misting and watering system controller with light sensistive detector
First Claim
1. A method of supplying water to plants comprising the steps of:
- detecting light adjacent the plants, said detected light having at least two levels of illumination corresponding to different states;
generating a first signal representative of a first state when the level of illumination of the detected light is less than a threshold level;
generating a second signal representative of a second state when the level of illumination of the detected light is greater than the threshold level;
anticipating in response to the first and second signals approximately when the detected light will next change from the first state to the second state and approximately when the detected light will next change from the second state to the first state;
generating an initiate signal and a terminate signal, said initiate signal being generated a first period of time before or after the anticipated change from the first state to the second state and said terminate signal being generated a second period of time before or after the anticipated change from the second state to the first state; and
supplying water to the plants in a sequence of at least one on period and at least one off responsive to the initiate signal to begin the sequence and responsive to the terminate signal to end the sequence.
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Accused Products
Abstract
System and method for supplying water to plants. A photodetector detects light adjacent the plants and a threshold circuit generates a first signal representative of a first state when the level of illumination of the detected light is less than a threshold level and generates a second signal representative of a second state when the level of illumination of the detected light is greater than the threshold level. A processor is responsive to the first and second signals for anticipating approximately when the detected light will next change from the first state to the second state and approximately when the detected light will next change from the second state to the first state. A counter circuit responsive to the processor generates an initiate signal and a terminate signal. The counter circuit generates the initiate signal a first period of time before or after the anticipated change from the first state to the second state and generates the terminate signal a second period of time before or after the anticipated change from the second state to the first state. A valve control circuit, responsive to the initiate signal for beginning a sequence of alternating on and off periods and responsive to the terminate signal for ending the sequence, controls a valve arrangement which supplies water to the plants.
78 Citations
20 Claims
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1. A method of supplying water to plants comprising the steps of:
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detecting light adjacent the plants, said detected light having at least two levels of illumination corresponding to different states; generating a first signal representative of a first state when the level of illumination of the detected light is less than a threshold level; generating a second signal representative of a second state when the level of illumination of the detected light is greater than the threshold level; anticipating in response to the first and second signals approximately when the detected light will next change from the first state to the second state and approximately when the detected light will next change from the second state to the first state; generating an initiate signal and a terminate signal, said initiate signal being generated a first period of time before or after the anticipated change from the first state to the second state and said terminate signal being generated a second period of time before or after the anticipated change from the second state to the first state; and supplying water to the plants in a sequence of at least one on period and at least one off responsive to the initiate signal to begin the sequence and responsive to the terminate signal to end the sequence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Apparatus for controlling a watering system for supplying water to plants in a sequence of at least one on and off period and at least one off period, said watering system including at least one valve connected to a water supply, said apparatus comprising:
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a photodetector for detecting light adjacent the plants, said detected light having at least two levels of illumination corresponding to different states; a threshold circuit for generating a first signal representative of a first state when the level of illumination of the detected light is less than a threshold level and for generating a second signal representative of a second state when the level of illumination of the detected light is greater than the threshold level; a processor responsive to the first and second signals for anticipating approximately when the detected light will next change from the first state to the second state and approximately when the detected light will next change from the second state to the first state; a counter circuit responsive to the processor for generating an initiate signal and a terminate signal, said initiate signal being generated a first period of time before or after the anticipated change from the first state to the second state and said terminate signal being generated a second period of time before or after the anticipated change from the second state to the first state; and a valve control circuit responsive to the initiate signal to begin the sequence and responsive to the terminate signal to end the sequence.
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11. A system for supplying water to plants comprising:
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a photodetector for detecting light adjacent the plants, said detected light having at least two levels of illumination corresponding to different states; a threshold circuit for generating a first signal representative of a first state when the level of illumination of the detected light is less than a threshold level and for generating a second signal representative of a second state when the level of illumination of the detected light is greater than the threshold level; a processor responsive to the first and second signals for anticipating approximately when the detected light will next change from the first state to the second state and approximately when the detected light will next change from the second state to the first state; a counter circuit responsive to the processor for generating an initiate signal and a terminate signal, said initiate signal being generated a first period of time before or after the anticipated change from the first state to the second state and said terminate signal being generated a second period of time before or after the anticipated change from the second state to the first state; means, including a valve, for supplying water to the plants in a sequence of at least one on period and at least one off period; and a valve control circuit responsive to the initiate signal to begin the sequence and responsive to the terminate signal to end the sequence. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification