CN105445140A - Evaporation testing method based on weighing method - Google Patents
Evaporation testing method based on weighing method Download PDFInfo
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- CN105445140A CN105445140A CN201610046367.6A CN201610046367A CN105445140A CN 105445140 A CN105445140 A CN 105445140A CN 201610046367 A CN201610046367 A CN 201610046367A CN 105445140 A CN105445140 A CN 105445140A
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- weight
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- evaporating dish
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
Abstract
The invention discloses an evaporation testing method based on a weighing method. The method mainly solves the problem that an existing evaporation testing method is low in measuring precision and the like. The method includes the following steps of firstly, weighing the original weight G1 of an evaporation container, and weighing the original weight G1' of a rain gauge; secondly, weighing the real-time weight G2 of the evaporation container time T later, and weighing the real-time weight G2' of the rain gauge time T later, wherein T is the measurement cycle; thirdly, obtaining the evaporation amount according to the formula (please see the formula in the specification). The method is convenient to implement and high in measurement precision.
Description
Technical field
The present invention relates to a kind of device for measuring water surface evaporation, specifically, relating to a kind of evaporation method of testing based on weight method.
Background technology
In hydrometeorology monitoring, evaporation from water surface is an important parameter.In prior art, evaporator is mainly measured by the landing difference of high-precision dimensional measuring instrument (vernier caliper etc.) to the water surface, and such Problems existing is that random error of measurement is larger; Although the precision of dimensional measuring instrument is very high, the water surface does not have solid shape, is easily out of shape, and is difficult to hold whether chaining pin is just contact the water surface during measurement, and therefore precision is difficult to the requirement reaching " evaporation from water surface observation criteria ".
Summary of the invention
The object of the invention is to overcome above-mentioned defect, provide a kind ofly to realize conveniently, the evaporation method of testing based on weight method that measuring accuracy is high.
To achieve these goals, the present invention is by the following technical solutions:
Based on an evaporation method of testing for weight method, comprise the following steps:
(1) the original weight G of evaporating dish is taken
1step; Take udometric original weight G
1the step of `;
(2), after elapsed time T, the real-time weight G of evaporating dish is taken
2step; After elapsed time T, take udometric real-time weight G
2the step of `, wherein, T be greater than 0 measuring period;
(3) according to following formula (1) and formula (2), evaporation capacity is obtained:
Y＝(G
2`-G
1`)/(ρS`)(2)
In formula, X represents evaporation capacity, and Y represents rainfall amount, ρ is the density of water, and S is the evaporation area of evaporating dish, and S` is the area of rain gage raingauge receiver mouth, wherein, S is the evaporation area of evaporating dish, and S` is that the area of rain gage raingauge receiver mouth is different according to the evaporator of different size and rain gage.
Further, the implementation taking weight in described step (1) and step (2) is as follows: realized evaporating dish, udometric pressure signal collection by pressure transducer, change according to pressure, pressure transducer produces corresponding voltage, electric current or resistance signal, reaches the object of weighing according to signal intensity.
Further, take weight in described step (1) and step (2) and realized by weighing system, described weighing system includes scale and the scale pan.
Further, the weight data information taken in described step (1) and step (2) is sent to background control center by wireless transmission method, and background control center calculates evaporation capacity information according to the weight data information received.
Further, in the time T after taking original weight data, evaporating dish and rain gage are not weighed.
Compared with prior art, beneficial effect of the present invention is:
The measurement that the present invention adopts weight method to realize evaporation capacity and rainfall amount, then obtains final evaporation capacity according to weight difference before and after measuring the rainfall amount and evaporating dish that obtain.Compared to traditional evaporation method of testing, the present invention realizes simply, has higher precision.
Embodiment
Below in conjunction with embodiment, the invention will be further described.Embodiments of the present invention include but not limited to the following example.
Traditional evaporation is measured and is adopted vernier caliper to measure, and concrete mode is, is measured the drop of the water surface in evaporating dish by vernier caliper, then according to the drop combination integration method of the water surface, the evaporation capacity of moisture in evaporating dish is calculated, although simple to operate, but measuring accuracy is low.
Embodiment 1
Present embodiments provide a kind of evaporation method of testing based on weight method, the measurement that this method of testing adopts the mode of weighing to realize evaporation capacity, by evaporating dish before the evaporation after weight change obtain evaporation capacity data, avoid adopt vernier caliper carry out measuring the not good enough problem of brought measuring accuracy.This weight method realize shown in the following formula of principle:
Y＝(G
2`-G
1`)/(ρS`)(2)
In formula, X represents evaporation capacity, and Y represents rainfall amount, and ρ is the density of water, and S is the evaporation area of evaporating dish, and S` is the area of rain gage raingauge receiver mouth.Because evaporate station basic setup out of doors, therefore natural precipitation can bring impact to the actual measurement of evaporate station, now, is then absolutely necessary to the measurement of rainfall amount.Known according to formula (1), evaporation capacity is the weight difference of (measuring period) and the combination of rainfall amount before and after Pan evaporation, meanwhile, known according to formula (2), rainfall amount is the weight difference of (measuring period) before and after rain gage evaporation.
According to above-mentioned principle, the concrete steps of this method are as follows:
(1) the original weight G of evaporating dish is taken
1step; Take udometric original weight G
1the step of `;
(2), after elapsed time T, the real-time weight G of evaporating dish is taken
2step; After elapsed time T, take udometric real-time weight G
2the step of `, wherein, T be greater than 0 measuring period;
(3) according to following formula (1) and formula (2), evaporation capacity is obtained:
Y＝(G
2`-G
1`)/(ρS`)(2)
Evaporator and udometric weighing adopt weighing system to realize, weighing system includes scale and the scale pan, in the present embodiment, scale adopts pressure transducer to realize weighing, specifically, realized evaporating dish, udometric pressure signal collection by pressure transducer, change according to pressure, pressure transducer produces corresponding voltage, electric current or resistance signal, reaches the object of weighing according to signal intensity.
The embodiment of weighing system is as follows: when rain gage or evaporator (evaporating dish) are placed on the scale pan, rain gage or evaporator (evaporating dish) only should be subject to gravity, and be no longer subject to external force, make it keep free state to weigh.Rain gage or evaporator (evaporating dish) depart from scale, when namely not weighing, are non-measured state, rain gage or evaporator (evaporating dish) be placed on scale is weighed time, be measuring state.The weighing precision of scale is more high better, and those skilled in the art can select according to actual conditions.
In the present embodiment, in the time T after taking original weight data, evaporating dish and rain gage are not weighed.Its implementation, for when needs take weight, adopts action actuating mechanism evaporating dish or rain gage to be placed on weighing system (scale pan), and in evaporation process, then evaporating dish or rain gage is taken off from weighing system.In another embodiment, evaporating dish and rain gage can be placed on weighing system always weighs, and system only need intercept front and back end Value Data measuring period, also can measure the continually varying data of evaporating dish and rain gage weight within measuring period in real time.
In the present embodiment, action actuating mechanism forms primarily of electric pushrod, realizes the knee-action of evaporation method of testing in vertical or vertical direction based on weight method by the expanding-contracting action of push rod.Further, also push-plate can be provided with, push-plate is arranged on the top of push rod, push rod has high-order and low level two kinds of positions, when being in a high position, rain gage or evaporating dish are placed on push-plate, and when being in low level, rain gage or evaporating dish are fallen on the scale pan, weigh, now, push-plate departs from rain gage or evaporating dish.
Embodiment 2
The difference of the present embodiment and embodiment 1 is, action actuating mechanism is mechanical arm, realizes evaporator (evaporating dish) or the placement between rain gage and weighing system and disengaging by the mechanical arm with multiple degrees of freedom (more than Three Degree Of Freedom).
Embodiment 3
The difference of the present embodiment and embodiment 1 is, the power of push rod is provided by motor lead screw, pneumatic or hydraulic pressure.
Embodiment 4
The difference of the present embodiment and embodiment 1 is, the present embodiment adopts background control center to realize rain gage or/and the data that evaporating dish is weighed process, the weight data information taken is sent to background control center by wireless transmission method, and background control center calculates evaporation capacity information according to the weight data information received.
Embodiment 5
The difference of the present embodiment and embodiment 1 is, the control of action actuating mechanism adopts background control center to carry out, specifically, action actuating mechanism also includes the assembly receiving order, as radio communication device, invalid communicator is connected with disposal system, and disposal system controls action actuating mechanism according to the order received.The steering order that background control center sends can be carried out according to the measuring period of establishing in system, also can carry out control operation by staff.
According to above-described embodiment, just the present invention can be realized well.What deserves to be explained is; under prerequisite based on above-mentioned design concept; for solving same technical matters; even if some making on architecture basics disclosed in this invention are without substantial change or polishing; the essence of the technical scheme adopted is still the same with the present invention, therefore it also should in protection scope of the present invention.
Claims (5)
1., based on an evaporation method of testing for weight method, it is characterized in that, comprise the following steps:
(1) the original weight G of evaporating dish is taken
1step; Take udometric original weight G
1the step of `;
(2), after elapsed time T, the real-time weight G of evaporating dish is taken
2step; After elapsed time T, take udometric real-time weight G
2the step of `, wherein, T is measuring period;
(3) according to following formula (1) and formula (2), evaporation capacity is obtained:
Y＝(G
2`-G
1`)/(ρS`)(2)
In formula, X represents evaporation capacity, and Y represents rainfall amount, and ρ is the density of water, and S is the evaporation area of evaporating dish, and S` is the area of rain gage raingauge receiver mouth.
2. the evaporation method of testing based on weight method according to claim 1, it is characterized in that, the implementation taking weight in described step (1) and step (2) is as follows: realized evaporating dish, udometric pressure signal collection by pressure transducer, change according to pressure, pressure transducer produces corresponding voltage, electric current or resistance signal, reaches the object of weighing according to signal intensity.
3. the evaporation method of testing based on weight method according to claim 2, is characterized in that, take weight in described step (1) and step (2) and realized by weighing system, described weighing system includes scale and the scale pan.
4. the evaporation method of testing based on weight method according to claim 2, it is characterized in that, the weight data information taken in described step (1) and step (2) is sent to background control center by wireless transmission method, and background control center calculates evaporation capacity information according to the weight data information received.
5. the evaporation method of testing based on weight method according to claim 1, is characterized in that, in the time T after taking original weight data, evaporating dish and rain gage are not weighed.
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|---|---|---|---|
| CN201610046367.6A CN105445140A (en) | 2016-01-22 | 2016-01-22 | Evaporation testing method based on weighing method |
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Cited By (6)
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|---|---|---|---|---|
| CN106018161A (en) * | 2016-07-14 | 2016-10-12 | 山西省交通科学研究院 | Water evaporation capacity testing device for macroporous asphalt mixture |
| CN106442206A (en) * | 2016-09-30 | 2017-02-22 | 中国科学院遗传与发育生物学研究所 | Water surface evaporation automatic measurement device for eliminating rainfall influence |
| CN108051871A (en) * | 2017-12-11 | 2018-05-18 | 吉林建筑大学 | A kind of monitoring of urban ecological system dew evaporation capacity and computational methods |
| CN109323951A (en) * | 2018-11-12 | 2019-02-12 | 宁夏大学 | For the evapotranspiration of grassland monitoring method under the complex environment of drought-hit area |
| CN109856002A (en) * | 2019-01-02 | 2019-06-07 | 昆明理工大学 | A method of the measurement plant leaf blade leaf table effectively amount of laying the dust |
| CN110108592A (en) * | 2019-04-03 | 2019-08-09 | 昆明理工大学 | A method of measurement leaves of plants table net settlement atmosphere PM |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018161A (en) * | 2016-07-14 | 2016-10-12 | 山西省交通科学研究院 | Water evaporation capacity testing device for macroporous asphalt mixture |
| CN106018161B (en) * | 2016-07-14 | 2019-08-30 | 山西省交通科学研究院 | Porous asphalt water evaporation quantity test device |
| CN106442206A (en) * | 2016-09-30 | 2017-02-22 | 中国科学院遗传与发育生物学研究所 | Water surface evaporation automatic measurement device for eliminating rainfall influence |
| CN108051871A (en) * | 2017-12-11 | 2018-05-18 | 吉林建筑大学 | A kind of monitoring of urban ecological system dew evaporation capacity and computational methods |
| CN109323951A (en) * | 2018-11-12 | 2019-02-12 | 宁夏大学 | For the evapotranspiration of grassland monitoring method under the complex environment of drought-hit area |
| CN109856002A (en) * | 2019-01-02 | 2019-06-07 | 昆明理工大学 | A method of the measurement plant leaf blade leaf table effectively amount of laying the dust |
| CN109856002B (en) * | 2019-01-02 | 2021-10-15 | 昆明理工大学 | Method for measuring effective dust retention amount of leaf surface of plant leaf |
| CN110108592A (en) * | 2019-04-03 | 2019-08-09 | 昆明理工大学 | A method of measurement leaves of plants table net settlement atmosphere PM |
| CN110108592B (en) * | 2019-04-03 | 2021-09-10 | 昆明理工大学 | Method for measuring plant leaf surface net settlement atmosphere PM |
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Application publication date: 20160330 |
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