CN201450984U - Electronic tensiometer - Google Patents
Electronic tensiometer Download PDFInfo
- Publication number
- CN201450984U CN201450984U CN2009201023683U CN200920102368U CN201450984U CN 201450984 U CN201450984 U CN 201450984U CN 2009201023683 U CN2009201023683 U CN 2009201023683U CN 200920102368 U CN200920102368 U CN 200920102368U CN 201450984 U CN201450984 U CN 201450984U
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- Prior art keywords
- pressure
- depressimeter
- magnetic valve
- electronics
- water
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- Expired - Lifetime
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Abstract
The utility model provides an electronic tensiometer which is formed by that a pressure delivering tube is connected with an argil head and an air header, wherein the argil head is embedded into the ground for a certain depth, and the air header is arranged on the upper part of the delivering tube. The air header is connected with a pressure transmitter which is connected with an irrigation control magnetic valve so as to give a switching value signal according to pressure variation to control on and off of the magnetic valve. When the inner pressure of the tensiometer is lower than the set value, the pressure transmitter outputs a 'switching off' signal to the magnetic valve which controls irrigation; when the inner pressure of the tensiometer is higher than the set value, the pressure transmitter outputs a 'switching on' signal. Compared with the traditional irrigation indicating equipment, the electronic tensiometer has high degree of automation, convenient management, simple structure and high sensitivity.
Description
Technical field
The utility model relates to a kind of electronics depressimeter, is mainly used in the automatic irrigation control under farmland, the green house condition, belongs to the control appliance technical field of precision agriculture water-saving irrigation.
Background technology
The efficient utilization of the irrigation water of farmland and green house is the important channel of realizing agricultural water conservation, owing to be subjected to the influence of precipitation, soil moisture content variation, determining of irrigation time need be according to the different depth of soil water regime, along with the situation of shortage of water resources is more serious, agricultural water is again main water consumption part, need measure accurately and manage duty, bury the dynamic change that the soil depressimeter can reflect soil moisture (gesture) underground at different parts.Therefore, the soil depressimeter is a kind of conventional instrument of measuring soil moisture content that generally uses both at home and abroad at present, owing to its volume is little, easy to carry, suits to use in the field, irrigates and reasonable, science water for instructing, and the conserve water resource has great help.Present widely used soil depressimeter is made up of three parts such as vitrified-clay pipe, water-supply-pipe and indicators.Vitrified-clay pipe is the inductive means of instrument, have many micro pores, vitrified-clay pipe by water infiltration after, in hole, form water membrane, when it is full of the undersaturated soil of insertion moisture of water and sealing, moisture film just is connected with water in the soil pore space, makes the water generates negative pressure in the transmission water pipe in the instrument, passes to indicator by the transmission water pipe.At present, known depressimeter indicator is vacuum meter mostly, and the observation personnel directly read data from vacuum meter and are used for instructing irrigation.Automatically control irrigation if realize depressimeter, just need to transmit the signal of telecommunication the electronics depressimeter.
Summary of the invention
The purpose of this utility model is to provide a kind of electronics depressimeter of automatic output switching value signal, at the requirement of automatic irrigation, and the electronic signal that output opens or closes in certain pressure limit, opening or closing by electronic signal control magnetic valve.
The technical solution of the utility model is achieved in that this electronics depressimeter, it is characterized in that: the electronics depressimeter is embedded in underground pot clay end by the connection of pressure transmission pipe and constitutes with the discharge that is arranged at transfer tube top, discharge connects the pressure converter, the pressure converter is connected with irrigation control magnetic valve, changes the break-make that provides switching value signal controlling magnetic valve according to pressure.
Described electronics depressimeter, described pot clay end are the vitrified-clay pipes that the bottom has blind hole.
Described electronics depressimeter, described discharge, pressure transmission pipe and pot clay end are communicated with the suit combination, and discharge (3) top is provided with seal cover.
The utility model changes by pressure transmitter induction depressimeter internal pressure and produces the switching value signal, by setting to pressure transmitter, when the depressimeter internal pressure when being lower than setting value, magnetic valve output " pass " signal that pressure transmitter is irrigated to control; When the depressimeter internal pressure was higher than setting value, pressure transmitter output " opening " signal was compared the automaticity height with traditional irrigation indicating equipment, and operational management is convenient, and is simple in structure, highly sensitive.Can replace artificial reading to instruct fully and irrigate, use manpower and material resources sparingly, and can in time carry out automatic irrigation, improve the value of water resource greatly according to soil water regime.Can be used in the automatic control irrigation system in land for growing field crops, gardens and greenhouse etc.
Description of drawings
Fig. 1 is the set-up mode schematic diagram of electronics depressimeter
Fig. 2 is an electronics depressimeter schematic diagram
Among the figure: 1, pot clay end 2, pressure transmission pipe 3, discharge 4, seal cover 5, pressure converter 6, magnetic valve
Embodiment
Fig. 1, shown in the utility model electronics depressimeter set-up mode schematic diagram, with reference to Fig. 1, mainly form from top to bottom when the utility model is upright by seal cover 4, discharge 3, pressure transmission pipe 2 and pot clay end 1, pot clay end 1 is the vitrified-clay pipe that the bottom has blind hole, there is water filling port the upper end of discharge 3, with seal cover 4 sealings, side has an interface to be connected with pressure transmitter 5; Collector pipe pot clay end 1, transfer tube 2, discharge 3 interconnect.
With reference to Fig. 2 principle, when the utility model uses,, vertically punch to desired depth with the drill of a diameter 20mm in the place of needs monitoring soil water potentials (soil moisture content), " degree of depth " refers to from the middle distance to ground of pot clay end, in the hole, add a little mud then, pot clay end closely contacted with soil, around the tamping of banketing, and injection little water, make loose ground heavy real, can not be gapped, guarantee that rainwater or irrigation water can not lose representativeness along oozing under the tube wall.Remove the seal cover 4 of discharge 3 upper ends, fill it up with distilled water by water filling port then, the rubber stopper in the jam-pack seal cover is tightened screw lid, can not leak gas.Pressure transmitter 5 connects power supply and magnetic valve by electric wire.Mounted electronics depressimeter is stable through 2 day time, and the water and the soil water in the instrument just can produce hydraulic connection, just can use.
During the utility model work, because pot clay end 1 closely contacts with soil, when soil moisture is unsaturated, water in the interstices of soil makes the inner negative pressure that produces of depressimeter by pot clay end, negative pressure transfers to pressure transmitter 5 by transfer tube 2, pressure transmitter as detecting element, and produces the switching value signal with pressure sensor, realizes the output of pressure continuous measurement and switching value.The switching value signal of output transfers to controller by electric wire, and then the switching of control magnetic valve 6, realizes that control is irrigated automatically.
The model that above-mentioned pressure transmitter adopts Beijing sensing starry sky automatic control Co., Ltd to produce is that the pressure transmitter of CGYL-501 is an example, and range is 0～1bar, 0.3 grade of precision, and the power supply of employing+24VDC power supply, the switching point force value requires customization according to monitoring.
Foregoing description only proposes as a kind of enforceable technical scheme of the utility model electronics depressimeter, and conduct is not to its structure or technology limitation condition.
Claims (3)
1. electronics depressimeter, it is characterized in that: the electronics depressimeter is connected discharge (3) formation that is embedded in underground pot clay end (1) and is arranged at transfer tube top by pressure transmission pipe (2), discharge connects pressure converter (5), pressure converter (5) is connected with irrigation control magnetic valve (6), changes the break-make that provides switching value signal controlling magnetic valve according to pressure.
2. according to the described electronics depressimeter of claim 1, it is characterized in that: described pot clay end is the vitrified-clay pipe that the bottom has blind hole.
3. according to the described electronics depressimeter of claim 1, it is characterized in that: described discharge (3), pressure transmission pipe (2) and pot clay end (1) are communicated with the suit combination, and discharge (3) top is provided with seal cover (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201023683U CN201450984U (en) | 2009-04-03 | 2009-04-03 | Electronic tensiometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201023683U CN201450984U (en) | 2009-04-03 | 2009-04-03 | Electronic tensiometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201450984U true CN201450984U (en) | 2010-05-12 |
Family
ID=42378312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201023683U Expired - Lifetime CN201450984U (en) | 2009-04-03 | 2009-04-03 | Electronic tensiometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201450984U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104303961A (en) * | 2014-11-10 | 2015-01-28 | 中国科学院地理科学与资源研究所 | Automatic irrigation control device and control method thereof |
| CN106324045A (en) * | 2016-11-01 | 2017-01-11 | 西安理工大学 | Device for testing electric conductivity and soil-water characteristics of loess |
| CN108375666A (en) * | 2018-02-26 | 2018-08-07 | 中国农业科学院农田灌溉研究所 | A kind of field irrigation monitoring device and method based on soil water potential |
| CN109682514A (en) * | 2019-03-13 | 2019-04-26 | 湖南大学 | High range high-precision tensometer and its use and saturation process based on fiber grating |
-
2009
- 2009-04-03 CN CN2009201023683U patent/CN201450984U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104303961A (en) * | 2014-11-10 | 2015-01-28 | 中国科学院地理科学与资源研究所 | Automatic irrigation control device and control method thereof |
| CN106324045A (en) * | 2016-11-01 | 2017-01-11 | 西安理工大学 | Device for testing electric conductivity and soil-water characteristics of loess |
| CN108375666A (en) * | 2018-02-26 | 2018-08-07 | 中国农业科学院农田灌溉研究所 | A kind of field irrigation monitoring device and method based on soil water potential |
| CN109682514A (en) * | 2019-03-13 | 2019-04-26 | 湖南大学 | High range high-precision tensometer and its use and saturation process based on fiber grating |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100512 |