CN2308911Y - Controller for farmland humidity alarming and automatic irragation - Google Patents

Abstract

The utility model discloses a controller used for farmland humidity alarming and automatic irrigation. In the utility model, the lower end of a rod body is connected and sealed with a multiporous pottery clay head, the upper part of the rod body is provided with a transparent air collecting chamber, the top end of the air collecting chamber is sealed by a rubber plug, one side of the air collecting chamber is connected with a vacuum meter with a switch structure, the vacuum meter is provided with two pointers, one of the pointers is a reading pointer, the other pointer is a presetting pointer, the same positions of the reading pointer and the presetting pointer are respectively fixed with a silvering contact, and the top of the presetting pointer is connected with a knob.

Description

Farmland humidity is reported to the police and the automatic irrigation controller

The utility model belongs to the observation and control technology field, relates to a kind of testing soil humidity sensor, particularly a kind of controller (G01L5/04) that is applicable to farmland humidity warning and automatic irrigation.

When various crops need to irrigate, and soil moisture tension meter commonly used is indicated.The high-yield cultivating of the different growing of Different Crop and crop of the same race is very close to the dependence of soil water potential, and the soil moisture tension meter is to be used for the instrument of the testing soil flow of water (moisture tension).The size of soil water potential can show by U type mercury table or the pressure vacuum gauge on the soil moisture tension meter, because existing soil moisture tension meter and other are used to measure the utensil of soil water content, for example Chinese patent 88219093.8 disclosed " Pen type humidometer " and Chinese patent 95239050.7 disclosed " Watering indicator " all can only directly show the moisture of soil, people must be by above-mentioned instrument or the shown reading of utensil to being embedded in the field, whether could understand soil needs to pour water, therefore existing soil moisture tension meter and other its corresponding utensils show that the farmland need irritate SIGNALS MANAGEMENT carrying out the large tracts of land multiple spot, and and then implement the occasion of the automatic control of field irrigation, will expose the deficiency that it can't overcome.

The purpose of this utility model is to provide a kind of farmland humidity to report to the police and the automatic irrigation controller, this controller is actually a kind of soil moisture tension meter that has improved, be that the utility model provides a kind of switching regulator soil humidity sensor, so that overcome the existing in prior technology weak point.

Task of the present utility model is finished in the following manner, a kind of farmland humidity is reported to the police and the automatic irrigation controller, be sealed with a porous pot clay end in the lower end of the body of rod, and the top of the body of rod is furnished with transparent collection chamber, the top of collection chamber seals with rubber stopper, and its key is the vacuum meter that a belt switch structure is arranged at a side joint of collection chamber.

The vacuum meter of above-mentioned belt switch structure can adopt following structure, this vacuum meter is provided with two pieces of pointers, one piece is the reading pointer, another piece is to preset pointer, at the reading pointer with preset on the same position of pointer and be fixed with a silver-plated contact respectively, the top of presetting pointer is linked with knob, presetting pointer is preset by the knob at its top, when the reading pointer turns to when presetting pointer position, reading pointer and the silver-plated contact of presetting on the pointer contact with each other, make the lead that is connected on these two contacts be in conducting state, finish the closed action of switch.

Below in conjunction with accompanying drawing shown in the embodiment the utility model is described in further detail.

Fig. 1 reports to the police and the structural representation of automatic irrigation with controller for farmland humidity;

Fig. 2 is a farmland humidity warning system circuit diagram;

With reference to Fig. 1, be sealed with a porous pot clay end 2 in the lower end of the body of rod 1, and the top of the body of rod 1 is furnished with transparent collection chamber 3, the top of collection chamber 3 seals with rubber stopper 4, its key is the vacuum meter 5 that a belt switch structure is arranged at a side joint of collection chamber, this vacuum meter 5 is provided with reading pointer 6 and presets pointer 7, at reading pointer 6 with preset on the same position of pointer 7 and be fixed with a silver-plated contact 8 respectively, the top of presetting pointer 7 is linked with knob 9, presetting pointer 7 is preset by the knob 9 at its top, when reading pointer 6 turns to when presetting pointer 7 positions, reading pointer 6 and the silver-plated contact 8 of presetting on the pointer 7 contact with each other, make the lead 10 that is connected on these two contacts 8 be in conducting state, finish the closed action of switch.

With reference to Fig. 2, farmland humidity is reported to the police and automatic irrigation links with controller via controller socket 1 and sound, optical alarm circuit, this sound, optical alarm circuit are provided with duty gauge tap K, divider resistance R and pilot lamp 0 by power supply E power supply in sound, the optical alarm circuit, also are provided with loudspeaker L simultaneously.In case when the antecedent soil moisture of a certain controlled field piece arrived setting value, controller just was in conducting state, the loudspeaker L in sound, the optical alarm circuit promptly sends to be needed to irritate chimes of doom, represents the pilot lamp 0 of this controlled field piece also to send the light signal simultaneously.

Above-mentioned farmland humidity is reported to the police the purposes of two aspects usually with controller with automatic irrigation, a kind of is that itself and sound, optical alarm circuit are linked, available many sensors are formed the farmland multiple spot need irritate warning device, and this moment, this controller was equivalent to a gauge tap of whole warning device.When certain piece farmland (or certain the field piece in the greenhouse) antecedent soil moisture during to a certain setting water potential value, be embedded in the reading pointer in the controller of this field piece and preset on the pointer and can overlap, its silver-plated contact contacts with each other, make the lead that is connected on these two contacts be in conducting state, whole warning device promptly sends needs to irritate chimes of doom, light signal.Another kind of purposes is; with the controller and the time relay; A.C. contactor; overvoltage protection switch and power supply etc. are formed easy automatic irrigation system; this moment, this controller was equivalent to a gauge tap of simple and easy automatic irrigation system; when certain piece farmland (or certain the field piece in the greenhouse) antecedent soil moisture during to a certain setting water potential value; be embedded in the reading pointer in the controller of this field piece and preset on the pointer and can overlap; its silver-plated contact contacts with each other; make the lead that is connected on these two contacts be in conducting state; this moment, the time relay entered duty; by the water pump that A.C. contactor is opened in the simple and easy automatic irrigation system this control field piece is irrigated; and control irrigation quantity (promptly controlling the working time of water pump) by the working time that the time relay presets; if power supply takes place unusual, the overvoltage protection switch plays a part to cut off the electricity supply.

Principle of work of the present utility model is: with water-filled controller (the being the switching regulator soil humidity sensor) certain depth of placing into the soil, when the moisture in the soil is in undersaturated condition, soil will be drawn the interior moisture of controller by the porous pot clay end, owing to being sucked out, moisture produces vacuum tightness in the controller, the vacuum tightness that produces in the dry more controller of soil is just big more, the size of soil water absorbing capacity gesture reflects by the vacuum meter on the controller, when the reading pointer is gone to and is preset pointer and coincides the position, reading pointer and the silver-plated contact of presetting on the pointer contact with each other, make the lead that is connected on these two contacts be in conducting state, when this controller and sound, when optical alarm circuit linked and forms the farmland multiple spot and need irritate warning device, whole warning device promptly sends needed to irritate chimes of doom, the light signal.When this controller and the time relay, A.C. contactor, overvoltage protection switch and power supply etc. were formed easy automatic irrigation system, the water pump in the simple and easy automatic irrigation system promptly was unlocked, and simple and easy automatic irrigation system is just irrigated control field piece.Preset type and the breeding time thereof of the determining positions of pointer in crops.For example, cucumber, little green vegetables are 10 kPas, and wheat seedling stage is 30 kPas, and the maturity stage is 50 kPas etc.

The utlity model has reliable operation, cost low, the characteristics such as be suitable for using on the spot, be specially adapted to seedling The garden, warm canopy vegetables, the humidity demands for control such as insect, vermiculture, and the farming such as industrial crops water-saving irrigation The field automatic irrigation system also can be used for the automatically controls of spray, drip irrigation system such as garden lawn.

Claims (2)

1, a kind of farmland humidity warning and automatic irrigation controller, be sealed with a porous pot clay end in the lower end of the body of rod, and the top of the body of rod is furnished with transparent collection chamber, and the top of collection chamber seals with rubber stopper, it is characterized in that having at a side joint of collection chamber the vacuum meter of a belt switch structure.

2, report to the police and the automatic irrigation controller according to the farmland humidity of claim 1 regulation, the vacuum meter that it is characterized in that described belt switch structure is provided with two pieces of pointers, one piece is the reading pointer, another piece is to preset pointer, at the reading pointer with preset on the same position of pointer and be fixed with a silver-plated contact respectively, the top of presetting pointer is linked with knob.