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Evaporation based irrigation prealarming device and its operation method

An early warning device and evaporation technology, applied in measuring devices, rainfall/precipitation gauges, using multiple variables to indicate weather conditions, etc., can solve the problems of insufficient consideration of rainfall, no automatic early warning function, cumbersome operation process, etc. , to achieve the effect of high practical value, easy operation and high measurement accuracy

Inactive Publication Date: 2008-08-06
FARMLAND IRRIGATION RES INST CHINESE ACAD OF AGRI SCI
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  • Abstract
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Problems solved by technology

In terms of evaporation monitoring, since the evaporation is greatly affected by the water level in the evaporating pan, water needs to be added frequently in order to maintain a stable water level in the evaporating pan during use. Large; in terms of irrigation early warning, the existing devices do not consider the factor of rainfall enough when used in field conditions, and there is no automatic early warning function, requiring the user to determine the irrigation time and irrigation amount through manual calculations

Method used

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  • Evaporation based irrigation prealarming device and its operation method
  • Evaporation based irrigation prealarming device and its operation method

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Embodiment Construction

[0018] The following description only represents a specific embodiment of the present invention, and is only for further illustrating the present invention, but not limiting the present invention.

[0019] As shown in Figures 1 and 2, the present invention includes an evaporation measurement device 1, a rain gauge 2, a controller 3 and an alarm device 4; Sensor 16; the top of the evaporating dish 7 is provided with a mesh cover 9, the mesh size of which is 20 mm, and the side wall of the evaporating dish 7 is provided with an overflow port 8, and the distance between its lower edge and the top edge of the evaporating dish 7 is 2 cm to 5 cm, preferably 3 cm; An air inlet pipe 15 is arranged on this water replenisher 12, and its aperture is 2.5mm. The two ends of the air inlet pipe 15 are open, and its lower end opening is at the same height as the lower edge of the overflow port 8, and its upper end opening is connected with the atmosphere; The water inlet 13, the water injecti...

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Abstract

The invention relates to an irrigation early warning device, in particular to an irrigation early warning device based on evaporation capacity and an operation method thereof. The irrigation early warning device comprises an evaporation capacity measuring device, an udometer, a controller and an alarm device, wherein, the evaporation capacity measuring device, the udometer and the alarm device are respectively connected with the controller which is used for receiving evaporation signals of the evaporation capacity measuring device and rainfall signals of the udometer and controlling the operation of the alarm device. The invention can be used no matter in a small parcel of rice field or a large parcel of rice field; due to adoption of automatic water replenishing design, time and labor are saved and the operation is simple and convenient; accumulated evaporation capacity is recorded automatically, and the measuring precision is high; dynamic irrigation early warning can be implemented according to rainfall conditions.

Description

Technical field: [0001] The invention belongs to the technical field of agricultural irrigation, and relates to an irrigation early warning device, in particular to an irrigation early warning device based on evaporation and an operation method thereof. Background technique: [0002] Irrigation early warning is one of the important ways to realize timely and appropriate irrigation of crops. Most of the current irrigation early warning devices use soil water content or soil water potential as the irrigation early warning index, which is to monitor the soil moisture status in the root layer of the crop through the soil moisture sensor, and judge whether it reaches the preset soil moisture control lower limit value to perform irrigation early warning. . Since the soil moisture monitored by the soil moisture sensor can only reflect the information of one monitoring point, in reality, there is often a large spatial variability in the soil moisture of the farmland, and the soil m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01W1/02G01W1/14G01F23/14
Inventor 张寄阳段爱旺孙景生申孝军
Owner FARMLAND IRRIGATION RES INST CHINESE ACAD OF AGRI SCI
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