CN106249317B - Based on stress-strain-electric signal relationship evaporation from water surface measuring method - Google Patents
Based on stress-strain-electric signal relationship evaporation from water surface measuring method Download PDFInfo
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- CN106249317B CN106249317B CN201610848244.4A CN201610848244A CN106249317B CN 106249317 B CN106249317 B CN 106249317B CN 201610848244 A CN201610848244 A CN 201610848244A CN 106249317 B CN106249317 B CN 106249317B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01W—METEOROLOGY
- G01W1/00—Meteorology
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
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Abstract
The invention discloses a kind of based on stress-strain-electric signal relationship evaporation from water surface measuring method.A kind of measuring device of water surface evaporation is set, is made of evaporating dish, resistance strain gage and signal acquiring system.Evaporating dish is processed into using stainless steel material, internal diameter 20.0mm, is highly 10.0mm, wall thickness 2.6mm.Resistance strain gage resistance value is 350, and structure type uses uniaxial strain piece, a length of 1.0mm of foil gauge wire grid.Signal picker is made of communication wire and computer end；It can be realized the real-time measurement of water surface evaporation by the device.This method principle is simple and convenient to operate, adaptable, and the result of measurement accurately and securely, can provide convenience for the research and application of related fields.
Description
Technical field
It is the invention belongs to weather monitoring technical field, in particular to a kind of based on stress-strain-electric signal relationship water surface
Measuring method is evaporated, this method is suitable for the relevant departments such as agricultural, forestry, meteorology, scientific research.
Background technique
Water surface evaporation is one of the main meteorological parameter of most weather station monitoring, refers to that moisture is through evaporating within certain period
And the amount in air is spread to, it characterizes the characteristic of land face moisture evaporation, is the important composition of water circulation.In recent years, with
The aggravation of the global climates corruptions such as greenhouse effects, causes the common concern of people, especially to influence climate condition
The evaporation quantifier elimination of one of key factor also becomes more and more important, and accurately measuring evaporation capacity is to carry out evaporation quantity research
Antecedent basis.Mainly there are evaporation pan, large-scale evaporation tub and evaporating dish etc. several for the measuring device of water surface evaporation at present
Kind.Wherein, evaporation pan is met with its cheap and simple, easy to operate, simulation evaporation situation close to reality and measurement accuracy
The advantages of most of duty requirements and be concerned.And the measuring principle of the evaporation pan device of mainstream mainly has weighing at present
Principle and ultrasonic wave principle, they have some limitations.Wherein, ultrasonic wave principle is primarily present following limitation: (1)
Error caused by manual operation is big, and measurement accuracy is low；(2) inaccuracy is measured under subzero environment；(3) unloaded in device
When (do not have water), be easily damaged sensor.And weighing principle is although overcome the limitation of ultrasonic wave principle, it is former there are still measuring
Limitation in reason, i.e., anti-fowl cover (such as device mouth top covers one and opens outward into horn-like wire net circle) cannot be complete mostly
Birds etc. are avoided to cause the inaccuracy of measurement to the touching of weighing sensor.
Summary of the invention
The purpose of the invention is to overcome defect existing in the prior art, provide a kind of based on stress-strain-telecommunications
The evaporation from water surface measuring method of number relationship.
Specific steps are as follows:
(1) a kind of measuring device of water surface evaporation is set, by evaporating dish, resistance strain gage and signal acquiring system group
At；Evaporating dish is processed into using stainless steel material, internal diameter 20.0mm, is highly 10.0mm, wall thickness 2.6mm；Resistance-strain
The center of evaporating dish is arranged in piece, and resistance value is 350 Ω, and structure type uses uniaxial strain piece, and foil gauge wire grid is a length of
1.0mm；Signal acquiring system is made of communication wire and computer end.
(2) calibration correction, specific steps are carried out to the measuring device of step (1) setting are as follows: 8 points of every night rainfall bucket
The water for measuring 20mm pours into evaporating dish, then puts on anti-fowl cover, while being zeroed to signal acquiring system, second night
8 points measure remaining height of water level in evaporating dish with rainfall bucket, while being zeroed again to signal acquiring system, same method
Continuous to implement a week, the result manually measured after a week is corrected the data that signal acquiring system detects.
(3) measuring device after step (2) correction is come into operation, is measured at 8 points of first night with rainfall bucket
The water of 20.0mm pours into evaporating dish, then puts on anti-fowl cover, whole device just supervises water surface evaporation in real time at this time
It surveys and causes the amount of SEA LEVEL VARIATION in evaporating dish to be converted into electric signal evaporation, finally return to electric signal to computer end, i.e., in fact
Now based on stress-strain-electric signal relationship evaporation from water surface measurement.
It is described to cause the amount of SEA LEVEL VARIATION in evaporating dish to be converted into the realization principle of electric signal evaporation are as follows: to be answered based on resistance
Become the principle of piece, i.e. stress-strain-electric signal relationship, cause the amount of SEA LEVEL VARIATION in evaporating dish to be converted into electric signal evaporation,
The verifying calculation process based on stress-strain-electric signal relationship measurement method is as follows:
Resistance strain gage working principle:It will strain and be converted into electric signal.
In formula, R is resistance value, can be measured, KSIt is it is known that ε is the strain at measuring point for the sensitivity coefficient of material.
The Hooke's law of material: σ=E ε
In formula, σ is stress suffered by material, and E is the elasticity modulus of material.
Water surface elevation difference DELTA h (mm)=test value-initial value=ho-h1 in evaporation capacity=evaporating dish.
Test value: after certain time evaporates, residual water level height in evaporating dish.
Initial value: height of water level in initial time evaporating dish.
The difference of front and back water surface elevation value twice is the evaporation capacity of this period.
Then,
The advantages of the method for the present invention:
(1) interference to measurement sensor such as birds is efficiently solved, measurement result is more accurate.
(2) principle of this method based on foil gauge, the performance of measurement are stable, reliable.
(3) adaptable, it can be used under the adverse circumstances such as high temperature, high pressure, underwater and high-intensity magnetic field, while passing through signal
The integrated of acquisition system can be realized real-time, continuous automatic measurement, can effectively improve working efficiency.
Detailed description of the invention
Fig. 1 is the main view of device used herein.
Fig. 2 is the top view of device used herein.
Marked in the figure: 1- evaporating dish；2- overflow hole；3- resistance strain gage；4- signal acquiring system.
Specific embodiment
Embodiment:
(1) a kind of measuring device of water surface evaporation is set, by evaporating dish, resistance strain gage and signal acquiring system group
At；Evaporating dish is processed into using stainless steel material, internal diameter 20.0mm, is highly 10.0mm, wall thickness 2.6mm；Resistance-strain
The center of evaporating dish is arranged in piece, and resistance value is 350 Ω, and structure type uses uniaxial strain piece, and foil gauge wire grid is a length of
1.0mm；Signal acquiring system is made of communication wire and computer end.
(2) when using above-mentioned apparatus, should first calibration correction, specific steps be carried out to whole device are as follows: 8 points of every night is used
The water that rainfall bucket measures 20mm pours into evaporating dish, then puts on anti-fowl cover, while being zeroed to signal acquiring system, and second
It measures remaining height of water level in evaporating dish with rainfall bucket at 8 points at night, while being zeroed again to signal acquiring system.Together
Quadrat method is continuously implemented a week, and the result manually measured after a week carries out school to the data that signal acquiring system detects
Just.
(3) signal acquiring system after correcting can come into operation, and measure the evaporation capacity in certain period of time, only need to be the
The water of 20mm is poured into evaporating dish at 8 points one evening, whole device just monitors water surface evaporation in real time at this time
And return to electric signal to computer end, which long-time automatic collection and can achieve, that is, realizes and answered based on stress-
Change-electric signal relationship evaporation from water surface measurement.If occurring rainy day in surveying range, corresponding evaporation capacity deducts rainfall
?.
Claims (1)
1. a kind of based on stress-strain-electric signal relationship evaporation from water surface measuring method, it is characterised in that specific steps are as follows:
(1) a kind of measuring device of water surface evaporation is set, is made of evaporating dish, resistance strain gage and signal acquiring system；It steams
Hair ware is processed into using stainless steel material, and internal diameter 20.0mm is highly 10.0mm, wall thickness 2.6mm；Resistance strain gage setting
In the center of evaporating dish, resistance value is 350 Ω, and structure type uses uniaxial strain piece, a length of 1.0mm of foil gauge wire grid；
Signal acquiring system is made of communication wire and computer end；
(2) calibration correction, specific steps are carried out to the measuring device of step (1) setting are as follows: 8 points of every night is measured with rainfall bucket
The water of 20mm pours into evaporating dish, then puts on anti-fowl cover, while being zeroed to signal acquiring system, and 8 points of second night
Remaining height of water level in evaporating dish is measured with rainfall bucket, while being zeroed again to signal acquiring system, same method connects
Continuous to implement a week, the result manually measured after a week is corrected the data that signal acquiring system detects；
(3) measuring device after step (2) correction is come into operation, measures 20.0mm's with rainfall bucket at 8 points of first night
Water pours into evaporating dish, then puts on anti-fowl cover, and whole device just monitors water surface evaporation in real time and will steam at this time
The amount of SEA LEVEL VARIATION in evaporating dish of having carried out the coffin upon burial is converted into electric signal, finally returns to electric signal to computer end, that is, realizes based on answering
Power-strain-electric signal relationship evaporation from water surface measurement；
It is described to cause the amount of SEA LEVEL VARIATION in evaporating dish to be converted into the realization principle of electric signal evaporation are as follows: to be based on resistance strain gage
Principle, i.e. evaporation causes the amount of SEA LEVEL VARIATION in evaporating dish to be converted into electric signal, the base by stress-strain-electric signal relationship
It is as follows in the verifying calculation process of stress-strain-electric signal relationship evaporation from water surface measuring method:
Resistance strain gage working principle:It will strain and be converted into electric signal；
In formula, R is resistance value, can be measured, KSIt is it is known that ε is the strain at measuring point for the sensitivity coefficient of material；
The Hooke's law of material: σ=E ε；
In formula, σ is stress suffered by material, and E is the elasticity modulus of material；
Water surface elevation difference DELTA h (mm)=test value-initial value=ho-h1 in evaporation capacity=evaporating dish；
Test value: after certain time evaporates, residual water level height in evaporating dish；
Initial value: height of water level in initial time evaporating dish；
The difference of front and back water surface elevation value twice is the evaporation capacity of this period；
Then,
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201885942U (en) * | 2010-11-25 | 2011-06-29 | 中国林业科学研究院林业研究所 | Soil evaporation sensor |
| CN102565876A (en) * | 2010-12-27 | 2012-07-11 | 张新潮 | Ultrasonic water surface evaporation measuring instrument |
| CN102608674A (en) * | 2012-02-26 | 2012-07-25 | 长安大学 | Water surface evaporation test system |
| CN203772356U (en) * | 2014-02-24 | 2014-08-13 | 中国农业科学院农业资源与农业区划研究所 | Weighing type automatic evaporometer |
-
2016
- 2016-09-26 CN CN201610848244.4A patent/CN106249317B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201885942U (en) * | 2010-11-25 | 2011-06-29 | 中国林业科学研究院林业研究所 | Soil evaporation sensor |
| CN102565876A (en) * | 2010-12-27 | 2012-07-11 | 张新潮 | Ultrasonic water surface evaporation measuring instrument |
| CN102608674A (en) * | 2012-02-26 | 2012-07-25 | 长安大学 | Water surface evaporation test system |
| CN203772356U (en) * | 2014-02-24 | 2014-08-13 | 中国农业科学院农业资源与农业区划研究所 | Weighing type automatic evaporometer |
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Application publication date: 20161221 Assignee: Guangxi Earthquake Prevention Engineering Technology Co.,Ltd. Assignor: GUILIN University OF TECHNOLOGY Contract record no.: X2022450000059 Denomination of invention: Measurement method of water surface evaporation based on stress-strain electrical signal relationship Granted publication date: 20190205 License type: Common License Record date: 20221118 |
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