6 results about "Irrigation control" patented technology

Methods and devices are provided to automatically determine plant water requirements and adjust irrigation in order to make efficient use of water. In one implementation, an irrigation control unit comprises a memory storing historical values of a plurality of variables used at least in part in calculating plant water requirements, and at least one input adapted to receive signals corresponding to current values of one or more of the plurality of variables. The unit also comprises a processor coupled to the at least one input and the memory, the processor adapted to determine the plant water requirements at least in part using, for each of the plurality of variables, a current value in the event the current value is available and at least in part using, for each of the plurality of variables, a stored historical value in the event the current value is not available.

A tensiometer for use in determining matric potential of a soil comprising: a water inlet; a hydraulic coupler comprising a porous material for providing hydraulic coupling between water that enters the inlet and the soil; and a septum that seals water that enters the inlet against ingress of air via the porous material.

The invention provides an open channel irrigation control system and method based on big data. The open channel irrigation control system based on the big data comprises a liquid level sensor and a valve device, wherein the valve device comprises a controller and a valve actuator for controlling a water inlet valve and a drainage valve; the liquid level sensor for measuring the liquid level of a land parcel to be irrigated is connected to the controller; and the controller controls the valve actuator based on the liquid level of the land parcel to be irrigated measured by the liquid level sensor and/or a received irrigation instruction.

The invention discloses a low-power-consumption irrigation controller based on the agricultural Internet of Things, and relates to the field of irrigation control equipment. The low-power-consumptionirrigation controller based on the agricultural Internet of Things comprises a solar panel, a power supply battery and a wireless communication module, the solar panel is connected with the power supply battery, and the wireless communication module is connected with the power supply battery, a data acquisition circuit of a sensor and an electric valve driving module used for driving an electric valve. And the wireless communication module is used for controlling the electric valve driving module according to the received control instruction after being awakened, reading the sensor data acquired by the data acquisition circuit and sending the sensor data to a remote terminal in communication connection with the wireless communication module. According to the low-power-consumption irrigation controller based on the agricultural Internet of Things, power supply and communication of the electric valve and the data acquisition circuit can be well achieved according to the remote terminal,and the problem of replacement caused by insufficient battery power does not need to be considered.