[특허]Irrigation control and flow management system

Irrigation control and flow management system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A01G-025/16
출원번호	US-0660780 (1991-02-25)
발명자 / 주소	Evelyn-Veere Rene H. (Alta Loma CA)
출원인 / 주소	Clemar Manufacturing Corp. (Azusa CA 02)
인용정보	피인용 횟수 : 60 인용 특허 : 0

초록 ▼

Method and apparatus for controlling an irrigation system within prescribed limits of pump capacity and flow capacity through water line branches and defined local zones. Watering schedules may be all simultaneously activated and will make multiple requests for watering time, for posting in a flow management roster. The requests in the roster are processed and satisfied only if overall pump capacity permits and if local flow zone capacities, and the capacities of water lines feeding the flow zones, are not exceeded. Pump capacity is expanded incrementally as more requests are processed, but only in accordance with predefined limits on the conditions that have to be met before moving to an expanded capacity. This flow management technique is best employed with a cycle-and-soak feature to avoid runoff problems at selected sites, and using an evapotranspiration approach to vary the watering times in accordance with changing weather conditions.

대표청구항 ▼

A method of controlling an irrigation control system in accordance with available pump capacity and local flow constraints, the method comprising the steps of: activating at least one watering schedule having a plurality of programmed watering times for a plurality of stations; placing the anticipated water flow requests for all active schedules in a flow management roster; and processing the requests for watering on a priority basis, including granting requests for watering at specific stations, based on availability of pump capacity and maintaining flow in local zones, and in water lines feeding the local zones, below designated maxima, and updating the flow management roster was watering continues, to reflect the passage of time and the current total flow conditions; wherein the step of granting requests for watering at specific stations includes determining the flow capacity presently available in a predefined watering zone in which each station is located; denying the request if granting it would exceed the zone capacity for water flow; determining the flow capacity of each branch water line upstream of each predefined watering zone; denying the request if granting it would exceed the capacity for water flow in any branch water line delivering water to the watering zone; determining the current pump capacity of the irrigation system, the currently running flow rate in the system, and the currently requested additional flows; and denying the request if the currently requested flows in the system are insufficient to justify incrementally expanding the current pump capacity of the system.

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