Adaptive Control Irrigation and Drainage System of Bottom Lysimeter Pit

A self-adaptive control, irrigation and drainage technology, applied in the direction of electrical program control, sequence/logic controller program control, etc., can solve problems such as high labor intensity, unfavorable irrigation test development, undisturbed soil layer damage, etc., to reduce labor The effect of intensity

Inactive Publication Date: 2016-11-16
JIANGSU COASTAL WATER CONSERVANCY SCI RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After a period of testing, due to the application of pesticides and chemical fertilizers, the salt content in the soil in the test pit will accumulate, which often needs to be solved by replacing the soil in the test pit, which is labor-intensive and damages the original soil layer in the test pit. Not conducive to the development of irrigation experiments

Method used

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  • Adaptive Control Irrigation and Drainage System of Bottom Lysimeter Pit
  • Adaptive Control Irrigation and Drainage System of Bottom Lysimeter Pit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] like figure 2As shown, open and close the judging circuit switch 4, the judging circuit pit measuring indicator 2 and the judging circuit field indicator 8 all light up, the system starts to work, the soil salinity is less than 4%, and the water level in the measuring pit is lower than the water level in the field, then measuring The total length of the negative pit metal probe wire 1 and the anode pit metal probe wire 6 exposed to the water surface in the pit judging circuit is greater than the total length of the cathode field metal probe wire 7 and the anode field metal probe wire 10 exposed to the water surface in the field judgment circuit, As a result, the resistance value in the pit judgment circuit is greater than the resistance value in the field judgment circuit. Since both the pit-testing judgment circuit and the field judgment circuit are powered by the judgment circuit power supply 3, under the same voltage, the current value with the larger resistance val...

Embodiment 2

[0034] like figure 2 As shown, the judgment circuit switch 4 is closed, the judgment circuit pit indicator light 2, and the judgment circuit field indicator light 8 all light up, the system starts to work, the soil salinity is <4%, and when the water level in the test pit is higher than the water level in the field, then The total length of the negative pit metal probe wire 1 and the anode pit metal probe wire 6 exposed to the water surface in the pit judgment circuit is less than the total length of the cathode field metal probe wire 7 and the anode field metal probe wire 10 exposed to the water surface in the field judgment circuit , causing the resistance value in the pit judgment circuit to be smaller than the resistance value in the field judgment circuit. Since both the pit-testing judgment circuit and the field judgment circuit are powered by the judgment circuit power supply 3, under the same voltage, the current value with the smaller resistance value is larger. For...

Embodiment 3

[0036] During the test, if it is found that the soil salt content in the test pit is ≥ 4%, which is unfavorable for the irrigation test, the control circuit closing knob 26 can be directly rotated, so that the control circuit drainage contact 28 and the control circuit irrigation contact 29 are short-circuited, and the control circuit closure. The irrigation pumping station 21 and the drainage pumping station 16 work at the same time, and the bottomed lysimeter pit 25 is washed with salt while irrigating and draining, so as to reduce the salt content in the soil in the bottomed lysimeter pit 25 .

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Abstract

The present invention is a self-adaptive control irrigation and drainage system with a bottom lysimeter pit, and its structure includes two parts: a judging circuit and a control circuit; the pole A of the electromagnet 5 of the pit testing circuit in the judging circuit and the field pole in the control circuit The B poles of the circuit electromagnet 9 are connected, and the other A of the pit circuit electromagnet 5 is connected. ， The pole is connected with the metal probe wire 6 of the anode test pit, and the other B of the Datian circuit electromagnet 9 in the control circuit ， The pole is connected with the anode field metal probe wire 10. Advantages: adaptively adjust the irrigation water level in the bottomed lysimeter pit, so that the crop irrigation water depth in the bottomed lysimeter pit is always consistent with that of the field; through the closed control circuit, the irrigation and drainage pump stations are opened at the same time, and the side-side irrigation is adopted. The soil salinity content in the bottomed lysimeter pit is reduced by means of drainage; thereby greatly reducing the labor intensity of artificial irrigation and drainage in the irrigation test and replacement of the soil in the bottomed lysimeter pit.

Description

technical field [0001] The invention relates to an adaptive control irrigation and drainage system with a bottom lysimeter pit. Background technique [0002] The bottomed lysimeter pit is a kind of experimental equipment widely used in agricultural irrigation experiments, and is usually used for the determination of crop evapotranspiration. According to the requirements in the irrigation test specification (SL13-2004), the soil surface area of ​​the lysimeter pit should generally not be less than 4m 2 , The soil filling depth in the test pit is generally 0.8-2.0m. In actual use, according to the change of the groundwater level of the field, the value of the groundwater level in the test pit is adjusted accordingly, so that the water level in the test pit is consistent with that of the field. By measuring the difference between pit irrigation and drainage, the net irrigation water consumption of crops is calculated, and converted into corresponding crop evapotranspiration. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/04
Inventor 刘德斌苏瑛杨延春邹志国
Owner JIANGSU COASTAL WATER CONSERVANCY SCI RES INST
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