CN115808507A - Automatic measuring system for evapotranspiration of reference crops in sloping field - Google Patents
Automatic measuring system for evapotranspiration of reference crops in sloping field Download PDFInfo
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- CN115808507A CN115808507A CN202211705313.8A CN202211705313A CN115808507A CN 115808507 A CN115808507 A CN 115808507A CN 202211705313 A CN202211705313 A CN 202211705313A CN 115808507 A CN115808507 A CN 115808507A
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Abstract
The invention discloses an automatic measuring system for evapotranspiration of reference crops in sloping fields, which belongs to the technical field of ecological environment monitoring and comprises a water supply device, a water collecting barrel, an automatic water pumping device and an evapotranspiration device arranged on a slope, wherein the water collecting barrel is arranged at the lower end of the evapotranspiration device, the water supply device conveys water into planting soil of the evapotranspiration device, and then the water is collected into the water collecting barrel and pumped to the water supply barrel through the automatic water pumping device; all be equipped with level sensor in supplying bucket and the collecting vat for the water level in survey supplying bucket and the collecting vat changes, calculates through the water level change in supplying bucket and the collecting vat in the unit interval and reachs the evapotranspiration volume in the unit interval. According to the invention, water is delivered into the planting soil of the evapotranspiration device through the water supply device according to the dynamic water quantity balance principle, so that the water inflow of the soil is ensured to be greater than the evapotranspiration quantity. The method can automatically measure the evapotranspiration of the reference crops in the sloping field, so that the soil water is always in a saturated state in the evapotranspiration observation of the reference crops in the sloping field, and the method is suitable for the field unmanned environment.
Description
Technical Field
The invention belongs to the technical field of ecological environment monitoring, and particularly relates to an automatic measuring system for evapotranspiration of slope reference crops.
Background
The water circulation process formed by the processes of precipitation, infiltration, runoff, water surface evaporation, soil evaporation, plant transpiration and the like is a basic element for maintaining a land ecosystem and a life system, wherein the soil evaporation and the plant transpiration are collectively called as Evapotranspiration (ET), and the evapotranspiration amount is an important basis for formulating a crop irrigation system and a regional irrigation water demand plan and is also an important content which is commonly concerned by a plurality of fields such as regional water balance, farmland irrigation, watershed water resource management and the like. The evapotranspiration is mainly limited by three factors, namely evapotranspiration potential comprehensively determined by the dryness of the atmosphere, radiation conditions and wind power; the soil water supply condition is determined by the soil moisture degree and the water conductivity; thirdly, vegetation conditions and the like determined by plant water transmission and guide tissues, leaf stomata quantity and size, population structure to turbulence exchange coefficient.
According to the needs of practical research work, there are different matters about evapotranspiration as follows: the ambient evapotranspiration (ETa), i.e. the actually produced evapotranspiration; potential evapotranspiration (ETp), the upper limit of evapotranspiration under ideal crop irrigation conditions, estimates the water demand or maximum water resource in a larger area; reference crop evapotranspiration (ET 0), i.e. the evapotranspiration amount that is highly uniform, exuberant in growth, sufficient in moisture, and completely covering green grass vegetation (grass or alfalfa). The measurement and estimation of the reference crop evapotranspiration (ET 0) are the core and the basis, and the indirect calculation of the actual crop evapotranspiration through multiplying the reference crop evapotranspiration (ET 0) by a crop coefficient is a common method at present, is an important basic parameter for determining the crop water demand and formulating an irrigation system, and has an important role in the aspect of agricultural water circulation.
In the measurement and estimation of the reference crop evapotranspiration (ET 0), a direct measurement method is a basic standard method, and an indirect estimation method is to establish a relationship with other elements and then invert the result and the change process of the reference crop evapotranspiration (ET 0) according to the measurement result and the change process of the other elements. Although indirect measurements are flexible, usually the results of indirect estimation need to be calibrated by direct measurements.
At present, the direct measurement of the evapotranspiration (ET 0) of the reference crop is carried out on the basis of a flat ground, and the result is obtained on the basis of the flat ground. However, the mountain area accounts for 1/6 of the whole world, the mountain area in China accounts for more than 2/3 of the whole country, and the mountain area in the North river accounts for more than 65% of the whole province. The problem of the total soil moisture in the observation of the evapotranspiration of the reference crops on the flat ground is not required to be considered, and the problem of the total soil moisture in the observation of the evapotranspiration of the reference crops on the sloping ground is required to be considered, and the influence of the structure and texture of the soil on the evapotranspiration is considered. Therefore, it is necessary to directly measure the evapotranspiration process of the reference crops on the sloping field, obtain the evapotranspiration result of the reference crops on the sloping field, strengthen the knowledge of the evapotranspiration of the reference crops on the sloping field, provide basic parameters for the calculation of the actual evapotranspiration of the sloping field on the mountainous area, and have important significance on the research of the water circulation and the water balance of the watershed.
Disclosure of Invention
The invention aims to provide an automatic determination system for evapotranspiration of reference crops in sloping fields, and aims to solve the technical problem that in the prior art, the evapotranspiration result of the reference crops in the sloping fields cannot be measured on the flat ground.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
an automatic measuring system for evapotranspiration of reference crops in sloping fields comprises a water supply device, a water collecting barrel, an automatic water pumping device and an evapotranspiration device arranged on a sloping surface, wherein the water collecting barrel is arranged at the lower end of the evapotranspiration device, water is conveyed into planting soil of the evapotranspiration device by the water supply device, and the water in the evapotranspiration device is collected into the water collecting barrel and pumped to a water supply barrel of the water supply device by the automatic water pumping device; and water level sensors are respectively arranged in the water supply barrel and the water collecting barrel and are respectively used for measuring the water level change in the water supply barrel and the water collecting barrel, and the evapotranspiration amount in unit time is calculated through the water level change in the water supply barrel and the water collecting barrel in unit time.
Preferably, the difference between the water level changes of the water supply barrel and the water collection barrel in unit time is multiplied by the ratio of the cross-sectional areas of the water supply barrel and the evapotranspiration device, and the obtained product is the evapotranspiration amount in unit time.
Preferably, the evapotranspiration device is of a parallelepiped frame structure, the bottom of the evapotranspiration device is a square bottom frame which is placed below a slope along a slope, parallelogram blocking edges are arranged around the evapotranspiration device, the blocking edges are vertically downward, the lower edges of the blocking edges extend to the position below the slope, and the top of the evapotranspiration device is 5-8cm higher than the surface of the slope; planting soil is filled in the inner cavity of the evapotranspirer, and the surface of the planting soil is flush with the surface of the outer side sloping field; and plants are sown in the planting soil in the evapotranspiration device.
Preferably, alfalfa is sown in the planting soil in the evapotranspiration device.
Preferably, the water supply device comprises a water supply barrel, a flow divider and a plurality of water dripping belts, and the plurality of water dripping belts are flatly laid on the top of the evaporating and dispersing device; the bottom outlet pipe of the water supply barrel conveys water to the plurality of drip tapes through the shunt, and the outlet pipe is provided with a valve for controlling the water outlet amount of the water supply barrel so as to ensure that the water supply amount of the water supply barrel is greater than the evapotranspiration amount of the evapotranspiration device.
Preferably, a plurality of drip tapes are arranged in parallel and are laid along the top of the evapotranspiration device from top to bottom along a slope; the flow divider is a water supply pipe with a plurality of water outlets, and the water outlets of the water supply pipe are respectively connected with different water dripping belts.
Preferably, the automatic water pumping device comprises a water pipe, a water pump and an intelligent recording controller, the water pump is arranged in the water collecting bucket, the water pump, the water level sensors in the water supply bucket and the water collecting bucket are connected with the intelligent recording controller, and the water pump supplies water into the water supply bucket through the water pipe.
Preferably, when the water amount in the water supply barrel is less than 5% of the total volume, the water level sensor in the water supply barrel sends a signal for starting the water pump to the intelligent recording controller, the intelligent recording controller sends a starting instruction to the water pump, and the water pump starts to fill water into the water supply barrel; when the water quantity in the water supply barrel reaches 95% of the total volume, the water level sensor in the water supply barrel sends a signal for stopping the water pump to the intelligent recording controller, the intelligent recording controller sends a stop instruction to the water pump, and the water pump automatically stops pumping water.
Preferably, the power supply of the intelligent recording controller is direct current DC24v, and the intelligent recording controller is provided with 4 paths of electric signal input channels and 4 paths of relay alarm output channels.
Preferably, still include solar power system, solar power system includes solar panel, charge controller, battery and direct current constant voltage power supply module, solar panel passes through charge controller and turns into the electric energy storage with solar energy in the battery, the battery provides the power to level sensor and water pump through direct current constant voltage power supply module.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: compared with the prior art, the invention has the advantages of high automation level, simple structure, convenient use and low price, water is delivered into the planting soil of the evapotranspirer through the water supply device, so that the internal soil is close to a saturated state, the soil water inflow is ensured to be greater than the evapotranspiration amount, and the automatic determination of the evapotranspiration amount of reference crops in different time periods in the whole process can be realized. According to the invention, the automatic determination of the evapotranspiration of the reference crops on the sloping field is completed according to the dynamic water balance principle, the problem that the evapotranspiration of the reference crops on the flat ground is not needed to be considered in the observation and the soil which is needed to be considered in the observation of the evapotranspiration of the reference crops on the sloping field is completely wet can be solved, and the soil water in the evapotranspiration device is ensured to be in a saturated state all the time; the influence of the soil structure and the texture on the evapotranspiration can be avoided, and meanwhile, the long-term use under the unattended condition can be realized.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural diagram of an automatic determination system for evapotranspiration of a reference crop on a sloping field according to an embodiment of the present invention;
FIG. 2 is a top view of the water collecting tub, the water supplying tub, the drip belt and the evapotranspiration device according to the embodiment of the present invention;
FIG. 3 is a schematic diagram of the connection between the water level sensor and the water pump and the intelligent recording controller according to the embodiment of the invention;
in the figure: 1-a water collecting barrel, 2-a evapotranspiring device, 3-a water supply barrel, 4-a water level sensor, 5-a flow divider, 6-a water dropping belt, 7-a valve, 8-a water conveying pipe, 9-a water pump and 10-an intelligent recording controller.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the system for automatically measuring evapotranspiration of reference crops in sloping fields provided by the invention comprises a water supply device, a water collecting bucket 1, an automatic water pumping device and an evapotranspirer 2 arranged on a slope, wherein the water collecting bucket 1 is arranged at the lower end of the evapotranspirer 2, water is conveyed into planting soil of the evapotranspirer 2 by using the water supply device, so that the internal soil water is always in a saturated state, and the water in the evapotranspirer 2 is collected into the water collecting bucket 1 and pumped to a water supply bucket 3 of the water supply device by the automatic water pumping device; and water level sensors 4 are respectively arranged in the water supply barrel 3 and the water collecting barrel 1 and are respectively used for measuring the water level change in the water supply barrel 3 and the water collecting barrel 1, and the evapotranspiration amount in unit time is calculated through the water level change in the water supply barrel 3 and the water collecting barrel 1 in unit time. The shape and size of the water collecting barrel are the same as those of the water supply barrel, and the working principle is that the evapotranspiration of the slope reference crops is equal to the difference between the water level changes of the water supply barrel 3 and the water collecting barrel 1 in unit time, and then the ratio of the cross sectional area of the water supply barrel 3 to the cross sectional area of the evapotranspirer 2 is multiplied, so that the evapotranspiration in unit time is obtained.
According to the invention, the automatic determination of the evapotranspiration of the reference crops on the sloping field is completed by synchronously monitoring the water level changes of the water supply barrel 3 and the water collecting barrel 1 according to the dynamic water balance principle, so that the automatic determination of the evapotranspiration of the reference crops on a short time scale can be realized, and meanwhile, the long-term use under the field unattended condition can be realized.
In one embodiment of the present invention, as shown in fig. 1 and 2, the evaporation and diffusion device 2 is a parallelepiped frame structure, the bottom of the evaporation and diffusion device 2 is a square bottom frame placed under a slope along a slope, parallelogram ribs are arranged around the evaporation and diffusion device 2, the ribs are vertically downward, the lower edge of the ribs extends to the lower part of the slope, and the top of the evaporation and diffusion device is 5-8cm higher than the surface of the slope; planting soil is filled in the inner cavity of the evapotranspirer 2, and the surface of the planting soil is flush with the surface of the outer side sloping field. Then, alfalfa is sown in the planting soil in the evapotranspiration device 2, and the water dripping belt 6 is laid and connected with the flow divider 5.
As a preferable scheme, as shown in fig. 2, the water supply device comprises a water supply barrel 3, a flow divider 5 and a plurality of water dripping strips 6, and the plurality of water dripping strips 6 are flatly laid on the top of the evapotranspiration device 2; the bottom outlet pipe of the water supply barrel 3 is used for conveying water to a plurality of water dripping belts 6 through a flow divider 5, and a valve 7 is arranged on the outlet pipe and used for controlling the water outlet amount of the water supply barrel 3 so that the water supply amount of the water supply barrel 3 is larger than the evapotranspiration amount of the evapotranspiration device 2. Wherein, a plurality of drip tapes 6 are arranged in parallel and are laid along the top of the evapotranspiration device 2 from top to bottom; the flow divider 5 is a water supply pipe with a plurality of water outlets, and the water outlets of the water supply pipe are respectively connected with different water dripping belts 6.
When the device is applied, the water supply barrel 3 is filled with water, and water is sprayed on the evapotranspiring device 2 at the same time, so that the internal soil is close to a saturated state. Then, the valve 7 on the water outlet pipe of the water supply barrel 3 is opened to supply water to the evapotranspiration device 2, and simultaneously, the water outlet quantity is ensured to be larger than the evapotranspiration quantity, namely, the water is ensured to flow out of the evapotranspiration device 2 and enter the water collecting barrel 1. When the sum of the water in the water supply barrel 3 and the water collecting barrel 1 is less than one tenth of the volume of the water supply barrel 3 or the water collecting barrel 1, the water supply barrel 3 is manually filled with water again, so that the water is ensured to flow out of the water supply barrel 3 all the time, enter the evapotranspiring device 2 and flow out of the evapotranspiring device 2 and enter the water collecting barrel 1.
In one embodiment of the present invention, as shown in fig. 1 and 3, the automatic water pumping device includes a water pipe 8, a water pump 9 and an intelligent recording controller 10, the water pump 9 is disposed in the water collecting tank 1, the water pump 9, the water level sensor 4 in the water supplying tank 3 and the water collecting tank 1 are both connected to the intelligent recording controller 10, and the water pump 9 supplies water into the water supplying tank 3 through the water pipe 8. Wherein, the water level sensors in the water supply barrel and the water collecting barrel are all voltage type, the power supply is DC12v, the output is 0-5v according to the size of the underground water level, and the water level changes in the water supply barrel and the water collecting barrel are respectively measured; the power supply of the water pump 9 is DC12V or DC24V, the power is 25W-50W, the lift is 2.0 m-5.0 m, and the flow is 10-15L/min; the power supply of the intelligent recording controller 10 is direct current DC24v, and the intelligent recording controller is provided with 4 paths of electric signal input channels and 4 paths of relay alarm output channels. The specific control process is as follows:
when the water amount in the water supply barrel 3 is less than 5% of the total volume, the water level sensor 4 in the water supply barrel 3 sends a signal for starting the water pump 9 to the intelligent recording controller 10, the intelligent recording controller 10 drives the relay alarm output channel to be closed, the intelligent recording controller drives the relay alarm output channel to be closed, a starting instruction is sent to the water pump 9, and the water pump 9 starts to pour water into the water supply barrel 3; when the water amount in the water supply barrel 3 reaches 95% of the total capacity, the water level sensor 4 in the water supply barrel 3 sends a signal for stopping the water pump 9 to the intelligent recording controller 10, the intelligent recording controller 10 sends a stop instruction to the water pump 9, and the water pump 9 automatically stops pumping water.
The technical scheme is further optimized, and the solar water heater further comprises a solar power generation device (not shown in the figure), wherein the solar power generation device comprises a solar panel, a charging controller, a storage battery and a direct-current stabilized voltage power supply module, the solar panel converts solar energy into electric energy through the charging controller to be stored in the storage battery, and the storage battery provides power for the water level sensor and the water pump through the direct-current stabilized voltage power supply module.
In a specific embodiment of the invention:
the solar power generation device comprises a solar panel of 50W, a solar charging controller of 10A, a storage battery of 48AH and DC stabilized power supply modules of IN9-18V and OUT 12V.
And secondly, the side length of the bottom frame of the evaporation and diffusion device is 50cm, and the height of the surrounding flanges is 30cm.
And (III) the inner diameters of the water supply barrel and the collecting barrel are all 30cm, the height is 100cm, and the volume is 70 liters.
And (IV) the flow of the water outlet of the water supply barrel is based on the evapotranspiration amount, and if the evapotranspiration amount of the reference crops is 15mm/d, the product is multiplied by the area of an evapotranspiration device to obtain 3.75 liters per day, namely the flow of the water outlet of the water supply barrel is only required to be larger than 3.75 liters per day, namely 5 liters per day. Thus, the water pump needs to be started up once in about 14 days, and water needs to be manually added to the water supply barrel once in 18 days.
And the flow divider adopts a water supply pipe with 1 water inlet and 4 water outlets and is connected with the four water dripping belts, and the inner diameter of the water inlet of the water supply pipe is 25mm, and the inner diameter of the water outlet of the water supply pipe is 20mm.
And sixthly, the diameter of the water dripping belt is 20mm, and the distance between the water dripping holes uniformly distributed on the water dripping belt is 10cm.
And (seventhly), the water level sensor supplies power to DC12v, outputs the power to 0-5v, has a measuring range of 0-100cm and is respectively used for measuring the water level change in the water supply barrel and the water collecting barrel.
And (eighthly), the intelligent recording controller supplies power to a direct current DC24v and is provided with 4 paths of relay alarm output channels and 4 paths of electric signal input channels.
And (ninthly), the water pump is powered by direct current DC12V, the power is 25w, the lift is 3.0 m, the flow is 12L/min, when the water depth in the water supply barrel is lower than 5.0cm, the intelligent recording controller drives the relay to alarm and output the closed channel, the water pump positioned in the water collecting barrel is started to pour water into the water supply barrel, and when the water depth in the water collecting barrel reaches 95.0cm, the water pump automatically stops pumping water, and the time of about 6 minutes is needed each time.
The working principle and the flow of the embodiment are as follows:
the evapotranspiration of the sloping field reference crop is equal to the difference of the water level changes of the water supply bucket and the water collection bucket in unit time, and then multiplied by the ratio of the cross sectional areas of the water supply bucket and the evapotranspiration device. Firstly, the water supply barrel is filled with water, and water is sprayed on the evapotranspirer at the same time, so that the internal soil is close to a saturated state. Then, the valve on the water outlet of the water supply barrel is opened to supply water to the evapotranspiration device, and simultaneously, the water yield is ensured to be larger than the evapotranspiration amount, namely, the water is ensured to flow out of the evapotranspiration device and enter the water collecting barrel. When the water depth in the water supply barrel is lower than 5.0cm, the intelligent recording controller drives the relay alarm output channel to be closed, the water pump in the water collection barrel is started to fill water into the water supply barrel, and when the water depth in the water supply barrel reaches 95.0cm, the water pump automatically stops pumping water. When the sum of the water in the water supply barrel and the water collecting barrel is less than one tenth of the volume of the water supply barrel or the water collecting barrel, the water supply barrel is manually filled with water again, so that the water is ensured to flow out of the water supply barrel all the time, enter the evapotranspiration device and flow out of the evapotranspiration device and enter the water collecting barrel.
In conclusion, the invention has the advantages of high automation level, convenient use, simple structure and low manufacturing cost, and water is delivered into the planting soil of the evapotranspirer through the water supply device according to the dynamic water balance principle, so that the internal soil is close to a saturated state, the soil water inflow is ensured to be greater than the evapotranspiration amount, and the automatic determination of the evapotranspiration amount of the reference crops in different time periods in the whole process can be realized. The method can solve the problem that the soil is totally moist, which is not needed to be considered in the evapotranspiration observation of the reference crops on the flat ground but needs to be considered in the evapotranspiration observation of the reference crops on the sloping field, can also avoid the influence of the soil structure and texture on the evapotranspiration, can realize the automatic determination of the evapotranspiration on a short time scale, can be used for a long time under the unattended condition, and is suitable for the automatic monitoring in the field.
In the description above, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and thus the present invention is not limited to the specific embodiments disclosed above.
Claims (10)
1. An automatic measuring system for evapotranspiration of reference crops on sloping fields is characterized in that: the water collecting barrel is arranged at the lower end of the evapotranspiration device, water is conveyed into planting soil of the evapotranspiration device by the water supply device, and water in the evapotranspiration device is collected into the water collecting barrel and pumped to a water supply barrel of the water supply device by the automatic water pumping device; and water level sensors are respectively arranged in the water supply barrel and the water collecting barrel and are respectively used for measuring the water level change in the water supply barrel and the water collecting barrel, and the evapotranspiration amount in unit time is calculated through the water level change in the water supply barrel and the water collecting barrel in unit time.
2. The automatic sloping field reference crop evapotranspiration measuring system according to claim 1, wherein: the difference between the water level changes of the water supply barrel and the water collecting barrel in unit time is multiplied by the ratio of the cross sectional area of the water supply barrel and the cross sectional area of the evapotranspiring device, and the evapotranspiring amount in unit time is obtained.
3. The automatic sloping field reference crop evapotranspiration measuring system according to claim 2, wherein: the evaporation and diffusion device is of a parallelepiped frame structure, the bottom of the evaporation and diffusion device is a square bottom frame which is placed below a slope along the slope, parallelogram blocking edges are arranged around the evaporation and diffusion device, the blocking edges are vertically downward, the lower edges of the blocking edges extend to the position below the slope, and the top of the evaporation and diffusion device is 5-8cm higher than the surface of the slope; planting soil is filled in the inner cavity of the evapotranspirer, and the surface of the planting soil is flush with the surface of the outer side sloping field; and plants are sown in the planting soil in the evapotranspiration device.
4. The automatic sloping field reference crop evapotranspiration measuring system according to claim 3, wherein: alfalfa is sown in the planting soil in the evapotranspiration device.
5. The automatic sloping field reference crop evapotranspiration measuring system according to claim 3, wherein: the water supply device comprises a water supply barrel, a flow divider and a plurality of water dripping belts, and the water dripping belts are tiled on the top of the evaporating and distributing device; the bottom outlet pipe of the water supply barrel conveys water to the plurality of drip tapes through the shunt, and the outlet pipe is provided with a valve for controlling the water outlet amount of the water supply barrel so as to ensure that the water supply amount of the water supply barrel is greater than the evapotranspiration amount of the evapotranspiration device.
6. The automatic determination system for evapotranspiration of a reference crop on a sloping field of claim 5, wherein: a plurality of drip tapes are arranged in parallel and are laid along the top of the evapotranspiration device from top to bottom; the flow divider is a water supply pipe with a plurality of water outlets, and the water outlets of the water supply pipe are respectively connected with different water dripping belts.
7. The automatic sloping field reference crop evapotranspiration measuring system according to claim 1, wherein: the automatic water pumping device comprises a water delivery pipe, a water pump and an intelligent recording controller, the water pump is arranged in the water collecting barrel, the water pump, the water level sensors in the water supply barrel and the water collecting barrel are connected with the intelligent recording controller, and the water pump supplies water into the water supply barrel through the water delivery pipe.
8. The automatic sloping field reference crop evapotranspiration measuring system according to claim 7, wherein: when the water amount in the water supply barrel is less than 5% of the total volume, a water level sensor in the water supply barrel sends a signal for starting the water pump to the intelligent recording controller, the intelligent recording controller sends a starting instruction to the water pump, and the water pump starts to fill water into the water supply barrel; when the water quantity in the water supply barrel reaches 95% of the total volume, the water level sensor in the water supply barrel sends a signal for stopping the water pump to the intelligent recording controller, the intelligent recording controller sends a stop instruction to the water pump, and the water pump automatically stops pumping water.
9. The automatic sloping field reference crop evapotranspiration measuring system according to claim 7, wherein: the power supply of the intelligent recording controller is direct current DC24v, and the intelligent recording controller is provided with 4 paths of electric signal input channels and 4 paths of relay alarm output channels.
10. The automatic sloping field reference crop evapotranspiration measuring system according to any one of claims 1 to 9, wherein: still include solar power system, solar power system includes solar panel, charge controller, battery and direct current constant voltage power supply module, solar panel passes through charge controller and turns into the electric energy deposit with solar energy in the battery, the battery provides the power through direct current constant voltage power supply module to level sensor and automatic pumping device.
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