CN102937643A - Split-type tensionmeter connected through soft pipes and used for measuring soil water potential - Google Patents
Split-type tensionmeter connected through soft pipes and used for measuring soil water potential Download PDFInfo
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- CN102937643A CN102937643A CN2012104620184A CN201210462018A CN102937643A CN 102937643 A CN102937643 A CN 102937643A CN 2012104620184 A CN2012104620184 A CN 2012104620184A CN 201210462018 A CN201210462018 A CN 201210462018A CN 102937643 A CN102937643 A CN 102937643A
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Abstract
The invention discloses a tensionmeter connected through soft pipes and used for measuring soil water potential. The tensionmeter comprises a clay pipe. A water injection soft pipe and a pressure guiding soft pipe are packaged on the upper end of the clay pipe respectively. The pressure guiding pipe is connected with a water storage air collecting pipe for storing water and collecting air. A cover is arranged on the water storage air collecting pipe. A vacuum pressure meter or a digital pressure sensor is arranged on a lateral end of the water storage air collecting pipe. When the tensionmeter is used as a traditional tensionmeter, the vacuum pressure meter is used, and during collecting of digital signals, users only need to replace the vacuum pressure meter with the digital pressure sensor, and other portions are not required to be changed. The collected signals are digital signals and are favorable for follow-up storage processing and the like. The tensionmeter is simple in structure, easy to manufacture and convenient to use, simultaneously gives consideration to a traditional and conventional use method, overcomes some defects of a traditional tensionmeter, reserves the advantages of low price and simple operation, enables measurement results to be correct, and is favorable for scientific measurement.
Description
Technical field
The invention belongs to a kind of agricultural surveying instrument in observation and control technology field, relate in particular to a kind of tensiometer of measurement soil water potential of flexible pipe connection.
Background technology
Soil moisture is that the research agricultural is done early and crop does important indicator early, is the Important Parameters that field irrigation management, the research of Regional Hydrologic condition and basin water balance-dividing calculate.Particularly along with the water source crisis becomes increasingly conspicuous, research is all paid close attention to water-saving agriculture both at home and abroad, and soil moisture content has also just become the project of often measuring in the water-saving agriculture research.How fast the research of assay method be mainly reflected in, measure accurately, economically the soil moisture content aspect, and this is in time verifying soil water regime, in order to make the decision-making of science or take rational measure etc. significant in good time.
By existing soil water potential determining instrument is analyzed, although can see the instrument of measuring at present soil water potential has a lot, principle is also a lot, have mechanical, digital display type is also arranged, but still have a lot of problems in using, or equipment is complicated, troublesome poeration requires high to operator's professional knowledge.Expensive, be unfavorable for promoting and the field utilization.Be exactly that power consumption is large in addition, be unfavorable for energy savings, especially under the lowered in field environment, the pot life of power consumption conference limiting device.The equipment that has simultaneously also can produce radiomaterial, and human body and soil are had harm.
Soil Tension is to measure a kind of instrument of soil water potential, and it is simple in structure, is easy to make, and is easy to use, but also there is following shortcoming in it:
1, measuring accuracy is low, and all is to carry out reading by the mechanical type instrument, is unfavorable for digital collection and the storage of data.
2, need the water filling of not timing, larger to the Soil Tension disturbance during water filling because Soil Tension is organic glass or plastics stiff rod structure, meeting spoiled soil structure is larger to the reliability effect of measurement result.
3, because Soil Tension is organic glass or plastics stiff rod structure, in soil, water can infiltrate along the hard tube wall, easily causes wall effect with its integral installation.
By the analysis to the relative merits of tensiometer, can find out, want better tensiometer to be applied in the scientific measurement, must update and perfect tensiometer.
Summary of the invention
In order to overcome the above defective that Soil Tension exists in the above-mentioned prior art, the object of the invention is to, a kind of tensiometer of split type measurement soil water potential of flexible pipe connection is provided, this tensiometer has been taken into account the characteristics that are simple and easy to usefulness of conventional tension meter, can carry out again digital collection and the storage of data.
In order to realize above-mentioned task, the present invention takes following technical solution:
The tensiometer of the measurement soil water potential that a kind of flexible pipe connects, it is characterized in that, comprise vitrified-clay pipe, be sealed with respectively a water filling flexible pipe and a pilot flexible pipe in the upper end of vitrified-clay pipe, described pilot flexible pipe connects the water storage discharge that is used for storing water and collects air, on the water storage discharge lid is arranged, at the side of water storage discharge, pressure vacuum gauge or digital pressure sensor are installed.
The tensiometer of the measurement soil water potential that flexible pipe of the present invention connects, vitrified-clay pipe and measure portion employing split-type design to traditional Soil Tension bury vitrified-clay pipe underground convenient.It is simple in structure, is easy to make, and is easy to use, takes into account simultaneously tradition and conventional using method, overcome some drawbacks of conventional tension meter, but kept its cheap, simple to operate advantage, improve again its structure, so that the result who measures is more accurate, be more conducive to carry out scientific measurement.When using as tradition, can use under the lowered in field environment with pressure vacuum gauge, needn't power to it, can be used as traditional tensiometer and use.And when carrying out the collection of digitized signal, only pressure vacuum gauge need to be replaced with digital pressure sensor just passable, other parts are not used as any change, and the signal that gathers like this has been exactly digital signal, and are all convenient to follow-up stores processor etc.
Description of drawings
Fig. 1 is the tensiometer of the measurement soil water potential of flexible pipe connection of the present invention, as the mounting structure figure of traditional use-pattern.
Fig. 2 is the tensiometer of the measurement soil water potential of flexible pipe connection of the present invention, the mounting structure figure of conventional use-pattern.
Mark among Fig. 1 and Fig. 2 represents respectively: 1, lid, 2, the water storage discharge, 3, water injection pipe, 4, connecting pipe, 5, vitrified-clay pipe, 6, pressure vacuum gauge, 7, digital pressure sensor.
Fig. 3 is the hardware circuit principle figure that the storage of digital signal of the present invention shows.
Below in conjunction with accompanying drawing embodiment the present invention is done further detailed explanation.
Embodiment
According to technical scheme of the present invention, the tensiometer of the measurement soil water potential that a kind of flexible pipe connects, comprise vitrified-clay pipe 5, be sealed with respectively a water filling flexible pipe 3 and a pilot flexible pipe 4 in 5 upper ends of vitrified-clay pipe, pilot flexible pipe 4 connects the water storage discharge 2 that is used for storing water and collects air, lid 1 is arranged on the water storage discharge 2, at the side of water storage discharge 2, pressure vacuum gauge 6 or digital pressure sensor 7 are installed.Be applicable to for measuring soil water matrix potential.
Below be to adopt the tradition of the tensiometer of the measurement soil water potential that this flexible pipe connects to use and conventional use-pattern.
Fig. 1 is the mounting structure figure of traditional use-pattern.Vitrified-clay pipe 5 is connected with the water storage discharge by connecting pipe 4 connections, so in use, can be measuring head with vitrified-clay pipe 5() be embedded in separately in the soil, to the disturbance of soil, also avoided the impact of wall effect simultaneously when avoiding reading or other operations.Water injection pipe 3 sealing-ins to vitrified-clay pipe 5 again water filling the time, just need not be taken out vitrified-clay pipe 5 like this in the upper end of vitrified-clay pipe 5 from soil, use more conveniently, also avoid the movement of the flow of water measuring position of the same point impact on measurement accuracy.When using as tradition, at the side of water storage discharge 2 pressure vacuum gauge 6 is installed, when lowered in field environment is used like this with regard to traditional the same use of tensiometer, and need not consider the factor such as power supply.
In concrete the making, water storage gas extractor 2 can adopt transparent machine glass to make, and can observe the variation of water storage gas extractor 2 interior water levels, and 4 requirements of pilot flexible pipe can pressure-bearing get final product.
Fig. 2 is the mounting structure figure of conventional use-pattern.In this case, except pressure vacuum gauge 6 is replaced with digital pressure sensor 7, other structure is the same with Fig. 1, because water storage discharge 2 side pressure vacuum gauges 6 are identical with the Interface design of digital pressure sensor 7, interchangeable installation, the hardware circuit that so just the pressure signal that collects just can be shown with the storage of digital signal by Fig. 3 is converted to digital signal, makes the data that collect more be conducive to the storage of computer and consults.
In the situation that Fig. 2, although digital pressure sensor 7 has been installed, the signal of output also needs to process, to obtain accurately data.As shown in Figure 3, digital pressure sensor 7 connects A/D converter by operational amplifier, A/D converter is digital signal with analog signal conversion, be input in the single-chip microcomputer by the I/O interface again, single-chip microcomputer also is connected with keyboard load module, LCD MODULE and data memory module by the I/O interface, and power module connects digital pressure sensor 7, operational amplifier and single-chip microcomputer; Wherein, operational amplifier amplifies faint electric signal, and LCD MODULE is used for showing in real time that the soil water potential that records, keyboard load module are used for enquiry of historical data and set various parameters, and data memory module then is used for store historical data.
Claims (4)
1. the tensiometer of the measurement soil water potential that connects of a flexible pipe, it is characterized in that, comprise vitrified-clay pipe (5), (5) upper end at vitrified-clay pipe is sealed with respectively a water filling flexible pipe (3) and a pilot flexible pipe (4), described pilot flexible pipe (4) connects the water storage discharge (2) that is used for storing water and collects air, lid (1) is arranged on the water storage discharge (2), and the side in water storage discharge (2) is equipped with pressure vacuum gauge (6) or digital pressure sensor (7).
2. the tensiometer of the measurement soil water potential of flexible pipe connection as claimed in claim 1 is characterized in that, described water storage gas extractor (2) adopts organic glass to make.
3. the tensiometer of the measurement soil water potential of flexible pipe connection as claimed in claim 1 is characterized in that, the pressure vacuum gauge (6) of described water storage discharge (2) side is identical with digital pressure sensor (7) interface, interchangeable installation.
4. the tensiometer of the measurement soil water potential that connects of flexible pipe as claimed in claim 1, it is characterized in that, described digital pressure sensor (7) connects A/D converter by operational amplifier, A/D converter is digital signal with analog signal conversion, be input in the single-chip microcomputer by the I/O interface again, single-chip microcomputer also is connected with keyboard load module, LCD MODULE and data memory module by the I/O interface, and power module connects digital pressure sensor (7), operational amplifier and single-chip microcomputer; Wherein, LCD MODULE is used for showing in real time that the soil water potential that records, keyboard load module are used for enquiry of historical data and set various parameters, and data memory module then is used for store historical data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104620184A CN102937643A (en) | 2012-11-15 | 2012-11-15 | Split-type tensionmeter connected through soft pipes and used for measuring soil water potential |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104620184A CN102937643A (en) | 2012-11-15 | 2012-11-15 | Split-type tensionmeter connected through soft pipes and used for measuring soil water potential |
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| CN102937643A true CN102937643A (en) | 2013-02-20 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103837665A (en) * | 2014-03-27 | 2014-06-04 | 中国农业大学 | Dot-matrix type soil negative pressure/moisture content measurement device |
| CN103884830A (en) * | 2014-03-26 | 2014-06-25 | 江苏省农业科学院 | Automatic temperature compensation type soil water tension meter system and determination method |
| CN105486838A (en) * | 2015-12-25 | 2016-04-13 | 中国科学院南京土壤研究所 | Convenient-to-maintain antifreezing tensiometer measuring soil water potential and test method |
| CN107764978A (en) * | 2017-11-08 | 2018-03-06 | 北京林业大学 | A kind of gasbag-type tensometer and its application method |
| CN108872312A (en) * | 2018-04-16 | 2018-11-23 | 河海大学 | A kind of high range soil water potential device and application method that saturation is easy |
| CN109030778A (en) * | 2018-07-20 | 2018-12-18 | 中国农业科学院农田灌溉研究所 | The soil moisture monitor of direct-connected pressure vacuum gauge |
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| CN2354130Y (en) * | 1998-10-07 | 1999-12-15 | 中国科学院南京土壤研究所 | Duplex soil-water tension meter |
| EP1203955A1 (en) * | 1999-07-08 | 2002-05-08 | Omron Corporation | Soil measuring instrument, soil measurement assisting device and method, recorded medium on which program is recorded, recorded medium on which data is recorded, application amount controller, application amount determining device, method for them, and farm working determination assisting system |
| GB2398637A (en) * | 2002-12-16 | 2004-08-25 | Sentek Pty Ltd | Soil matric potential and salinity measurement |
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2012
- 2012-11-15 CN CN2012104620184A patent/CN102937643A/en active Pending
Patent Citations (7)
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| CN2354130Y (en) * | 1998-10-07 | 1999-12-15 | 中国科学院南京土壤研究所 | Duplex soil-water tension meter |
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Non-Patent Citations (1)
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884830A (en) * | 2014-03-26 | 2014-06-25 | 江苏省农业科学院 | Automatic temperature compensation type soil water tension meter system and determination method |
| CN103837665A (en) * | 2014-03-27 | 2014-06-04 | 中国农业大学 | Dot-matrix type soil negative pressure/moisture content measurement device |
| CN103837665B (en) * | 2014-03-27 | 2015-09-09 | 中国农业大学 | A kind of dot matrix soil negative pressure/moisture measurement device |
| CN105486838A (en) * | 2015-12-25 | 2016-04-13 | 中国科学院南京土壤研究所 | Convenient-to-maintain antifreezing tensiometer measuring soil water potential and test method |
| CN107764978A (en) * | 2017-11-08 | 2018-03-06 | 北京林业大学 | A kind of gasbag-type tensometer and its application method |
| CN108872312A (en) * | 2018-04-16 | 2018-11-23 | 河海大学 | A kind of high range soil water potential device and application method that saturation is easy |
| CN108872312B (en) * | 2018-04-16 | 2020-08-04 | 河海大学 | Simple and convenient saturated high-range soil water potential device and use method |
| CN109030778A (en) * | 2018-07-20 | 2018-12-18 | 中国农业科学院农田灌溉研究所 | The soil moisture monitor of direct-connected pressure vacuum gauge |
| CN109030778B (en) * | 2018-07-20 | 2023-10-20 | 中国农业科学院农田灌溉研究所 | Soil moisture monitor directly connected with vacuum pressure gauge |
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Application publication date: 20130220 |