CN209356349U - Weighing Lysimeter precision changes totally-enclosed monitoring device and evapotranspiration measures system - Google Patents

Abstract

The utility model relates to the field of ecological monitoring equipment, in particular to a fully enclosed monitoring device for the accuracy change of a weighing lysimeter and an evapotranspiration measuring system. The fully enclosed monitoring device for the accuracy change of the weighing lysimeter includes a sealed box and a connecting piece, and the sealed box is used to be sleeved on the outside of the weighing lysimeter so that the weighing lysimeter is in a closed state , the connecting piece can connect the sealed box and the weighing lysimeter. It can keep the weighing lysimeter in a closed state during the period of monitoring accuracy, reducing the misjudgment of results caused by the influence of the external environment and water vapor exchange. The evapotranspiration measurement system can realize daily monitoring of changes in soil moisture, and can also quickly and easily realize changes in the weighing accuracy of regular monitoring instruments.

Description

Fully enclosed monitoring device for weighing lysimeter accuracy change and evapotranspiration measurement system

technical field

The utility model relates to the field of ecological monitoring equipment, in particular to a fully enclosed monitoring device for the accuracy change of a weighing lysimeter and an evapotranspiration measuring system.

Background technique

Weighing lysimeter is a high-precision instrument that measures changes in soil moisture by weighing containers filled with undisturbed soil and vegetation based on the principle of water balance. At present, the weighing lysimeter is often widely used in water conservancy, agriculture, ecology and other fields as an accurate evapotranspiration measurement method, and its observation results provide a scientific basis for calibrating and verifying other methods. According to the size of the caliber, it is usually divided into miniature (cross-sectional area ≤0.3m ² , depth ≤1.0m), small (0.3m ² <cross-sectional area ≤2.0m ² , 1.0m<depth ≤2m) and large (2.0m ² < Cross-sectional area, 2.0m<depth), etc. Among them, the large-scale weighing lysimeter can more truly simulate the process of natural soil moisture movement. The reason is that the area and depth of the large-scale weighing lysimeter can make the vegetation root system grow freely, and the influence of the isolation effect of the instrument boundary is the lowest, which ensures the consistency of the environment inside and outside the container, thus meeting the measurement accuracy requirements of the real evapotranspiration of the soil.

Due to the complex structure design of the large weighing lysimeter and the long-term placement in the outdoor field, with the increase of the service life and the impact of external force trampled and other factors, the connecting rod, load eccentric wheel, box components, etc. will inevitably have certain deflection. At the same time, the disturbance of the external environment to the normal operation of the lysimeter is also gradually highlighted, such as water vapor and temperature that cause corrosion and oxidation to the metal components of the box, weighing pan, zero counterweight, etc., these factors may cause lysimeter Therefore, regular monitoring of changes in the weighing accuracy of the instrument is essential. However, due to the limited knowledge of the instrument, the instrument users are often unable to detect changes in the weighing accuracy of the instrument, and can only rely on regular monitoring and maintenance by professionals; in addition, the soil surface of the instrument is an open interface, and the soil and the atmosphere are constantly For water vapor exchange, researchers place rated weights on the open interface to monitor whether the weighing accuracy changes, which will be affected by water vapor exchange and cause misjudgment of results. This makes the monitoring of the accuracy change of the lysimeter difficult, costly, time-consuming, and time-sensitive.

In view of this, the present application is proposed.

Utility model content

The purpose of this utility model includes, for example, providing a fully enclosed monitoring device for the accuracy change of weighing lysimeter, which can realize that the weighing lysimeter is in a closed state during the period of monitoring accuracy, reducing the external environment and water vapor. The effect of the exchange caused the results to be misjudged.

The purpose of the present utility model also includes providing an evapotranspiration measurement system, which can realize daily monitoring of changes in soil moisture, and can also quickly and easily realize changes in the weighing accuracy of regular monitoring instruments.

In order to achieve at least one of the above objectives, embodiments of the present utility model adopt the following technical solutions:

A fully enclosed monitoring device for the accuracy change of a weighing lysimeter, which includes a sealed box and a connecting piece. state, the connecting piece can connect the sealed box and the weighing lysimeter.

Optionally, in other embodiments of the present utility model, the above-mentioned sealed box includes a supporting frame and a waterproof curtain, the supporting frame can be installed around and on the top of the weighing lysimeter, the waterproof curtain is sleeved outside the supporting frame and It is connected to the weighing lysimeter through a connecting piece.

Optionally, in other embodiments of the present utility model, the above-mentioned connector includes a first magnetic strip and a second magnetic strip that cooperate with each other for connecting the waterproof curtain and the weighing lysimeter, and the first magnetic strip is pasted on the On the inner side of the waterproof curtain, the second magnetic strip is pasted on the outer side of the weighing lysimeter.

Optionally, in other embodiments of the present utility model, the above-mentioned connecting member further includes an adhesive tape, which can stick the lower edge of the waterproof curtain to the outer surface of the weighing lysimeter.

Optionally, in other embodiments of the present utility model, the above-mentioned connecting piece further includes a buckle for connecting the supporting frame and the weighing lysimeter.

Optionally, in other embodiments of the present utility model, the above-mentioned supporting frame includes side vertical rods, horizontal connecting rods and top support rods, and any two adjacent side vertical rods are connected by horizontal connecting rods to form a rectangular frame structure, the top surface support rod is located on the top surface of the rectangular frame structure and connected with the side vertical rod.

Optionally, in other embodiments of the present utility model, the above-mentioned side vertical rods and horizontal connecting rods are hinged or detachably connected, and there are four top support rods, which are respectively detachably connected to the four corners of the rectangular frame structure and Intersecting at the center of the top surface of the rectangular frame structure, the four top surface support rods are all hinged to a ball hinge with four openings.

Optionally, in other embodiments of the present utility model, the ball hinge includes a mounting block and four ball hinge elements, one end of the ball hinge element is a movable ball, and the other end of the ball hinge element is rod-shaped and is provided with a The mounting slots for the support rods on the top surface are accommodated. Four movable slots are arranged on the mounting block, and the movable balls of the four spherical hinge elements are respectively embedded in the four movable grooves.

Optionally, in other embodiments of the present utility model, the above-mentioned fully enclosed monitoring device for the accuracy change of the weighing lysimeter also includes a waterproof shed installed above the sealed box.

An evapotranspiration measurement system, which includes a weighing lysimeter and a fully enclosed monitoring device for the accuracy change of the weighing lysimeter, the fully enclosed monitoring device for the accuracy change of the weighing lysimeter and the weighing lysimeter can be Disconnect the connection.

The beneficial effects of the utility model embodiment include, for example:

The fully enclosed monitoring device for the accuracy change of the weighing lysimeter provided by the embodiment of the utility model uses a sealed box to be sleeved on the outside of the weighing type lysimeter, so that the weighing type lysimeter is in a sealed state, reducing the The influence of the external environment and water vapor exchange during the precision measurement of the weighing lysimeter causes misjudgment of the results. At the same time, the sealing box is connected with the weighing lysimeter by using the connector, so that the sealing box can be quickly installed and disassembled. It does not affect the daily monitoring of soil moisture changes of the weighing lysimeter, and at the same time, it can quickly and easily realize the change of the weighing accuracy of the regular monitoring instrument.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following drawings will be briefly introduced in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained according to these drawings without creative work.

Fig. 1 is the schematic structural diagram of the cooperation of the supporting frame and the weighing lysimeter provided by the embodiment of the utility model;

Fig. 2 is a schematic structural diagram of the cooperation of the waterproof curtain and the weighing lysimeter provided by the embodiment of the present invention;

Fig. 3 is a schematic structural diagram of a ball hinge provided by an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a waterproof shed provided by an embodiment of the present invention.

Icons: 100-fully enclosed monitoring device for weighing lysimeter accuracy change; 110-sealed box; 111-support frame; 112-waterproof curtain; 113-side vertical rod; 114-horizontal connecting rod; 115-top support Rod; 116-ball hinge; 117-installation block; 1171-movable groove; 118-ball hinge element; 1181-movable ball; 1182-installation groove; 120-connector; Magnetic strip; 123-adhesive tape; 124-hap; 130-waterproof shed; 200-weighing lysimeter.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is usually placed when the utility model product is used, or the orientation or positional relationship that is commonly understood by those skilled in the art, It is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", and it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of the present utility model, it should also be noted that, unless otherwise specified and limited, the terms "setting", "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection , can also be detachably connected, or integrally connected; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediary, and can be internal communication between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

Example

Please refer to FIG. 1 and FIG. 2 , the present embodiment provides a fully enclosed monitoring device 100 for accuracy change of a weighing lysimeter, which is used to monitor the accuracy change of a weighing lysimeter 200 . The specific results include a sealed box 110 and a connecting piece 120. The sealed box 110 is used to be sleeved on the outside of the weighing lysimeter 200 so that the weighing lysimeter 200 is in a closed state. The connecting piece 120 can be connected to the sealed Box 110 and weighing lysimeter 200 .

In this embodiment, the weighing-type lysimeter 200 is set in a sealed box 110 so that the weighing-type lysimeter 200 is in a relatively closed state. At this time, accuracy monitoring can avoid the influence of water vapor exchange. At the same time, it can reduce the influence of external air flow, temperature, weather, etc., and ensure the accuracy of monitoring results.

The sealed box 110 is mainly used to keep the weighing lysimeter 200 in a relatively closed state, so its specific structure may not be limited, as long as the weighing type lysimeter 200 is in a relatively closed state, For example, it can also be implemented by using a rectangular box directly sleeved on the outside of the weighing lysimeter 200 .

Please refer to Figure 1 and Figure 2, in this embodiment, in order to enhance its applicability and the convenience of installation and disassembly, the specific structure of the sealing box 110 and the connecting piece 120 is limited:

The sealed box 110 includes a support frame 111 and a waterproof curtain 112. The support frame 111 can be installed around and on the top of the weighing lysimeter 200. The waterproof curtain 112 is sleeved outside the support frame 111 and connected to the weighing type The lysimeter 200 is connected.

The connecting part 120 includes a first magnetic bar 121 , a second magnetic bar 122 , an adhesive tape 123 and a buckle 124 .

Among them, the first magnetic strip 121 and the second magnetic strip 122 are used to connect the waterproof curtain 112 and the weighing lysimeter 200, the first magnetic strip 121 and the second magnetic strip 122 can cooperate with each other for magnetic connection, and the magnetic connection is convenient to install And it is easy to disassemble and can be used repeatedly. The first magnetic strip 121 is pasted on the inside of the waterproof curtain 112 , and the second magnetic strip 122 is pasted on the outside of the weighing lysimeter 200 . The adhesive tape 123 can stick the lower edge of the waterproof curtain 112 to the outer surface of the weighing lysimeter 200, further improving the tightness of the connection between the waterproof curtain 112 and the weighing lysimeter 200, realizing multiple positioning seals, and the sealing effect is better good. In addition, the hasp 124 is used to connect the support frame 111 and the weighing lysimeter 200, and the support frame 111 can be installed on the side wall of the weighing type lysimeter 200, avoiding the disturbance of the side wind, and the operation is simple and fast.

The supporting frame 111 includes side vertical rods 113, horizontal connecting rods 114 and top surface supporting rods 115, any two adjacent side vertical rods 113 are connected by horizontal connecting rods 114 to form a rectangular frame structure, and the top surface supporting rods 115 are located in the rectangular frame structure. The top surface of the frame structure is connected with the side uprights 113 . In this embodiment, a rectangular frame structure is constructed by a rod structure or a column, and then a waterproof curtain 112 is sheathed on the outside of the rectangular frame structure, thereby forming a structure sealed around the periphery and the top surface. Then, the lower end of the waterproof curtain 112 is fixed to the weighing lysimeter 200 by using the above-mentioned connector 120 (the first magnetic strip 121 , the second magnetic strip 122 and the adhesive tape 123 ), so as to achieve sealing.

Through the rod-shaped side vertical rod 113, horizontal connecting rod 114 and top surface support rod 115, the structure of the side vertical rod 113, horizontal connecting rod 114 and top surface support rod 115 is simple, easy to install and disassemble, and easy to place .

There are many ways to connect the side uprights 113 , the horizontal connecting rods 114 and the top support rods 115 , such as fixed connection, detachable connection, hinged connection and so on.

During the fixed connection, the side vertical rod 113, the horizontal connecting rod 114 and the top support rod 115 can be directly welded, and when the weighing lysimeter 200 is removed later, the supporting frame 111 can be directly moved upward.

And when detachable connection, can utilize the two-way connector 120 that has groove, three-way connector 120 or four-way connector 120 at the junction of side vertical bar 113, transverse link 114 and top surface support rod 115 Easy to connect, install and remove.

In addition, the joints of the side vertical rods 113, the horizontal connecting rods 114, and the top support rods 115 can also be hinged. The hinged joints can realize extrusion deformation of the rectangular frame structure, thereby reducing its footprint and facilitating storage.

Specifically in this embodiment, the side vertical rods 113 and the horizontal connecting rods 114 can also be connected in a detachable or hinged manner. The four top support rods 115 are all hinged to the ball hinges 116 with four openings.

Such a connection method makes it easy to disassemble or squeeze and fold the frame structure composed of the side vertical rod 113 and the horizontal connecting rod 114, which is easy to install when the subsequent measurement is completed, and to place after the measurement is completed. At the same time, the top surface support rod 115 Through the ball hinges 116 with four openings to achieve mutual hinge, it can be realized that when disassembling, the four ends of the top surface support rod 115 are directly separated from the joints of the side vertical rods 113, and then the four top surface support rods are shrunk 115, and the four top support rods 115 can form a bundle, which is convenient for storage, and can be easily stretched when reinstalling later, and then the four ends of the four top support rods 115 can be connected.

Specifically, please refer to FIG. 3 , the ball hinge 116 includes a mounting block 117 and four ball hinge elements 118 , one end of the ball hinge element 118 is a movable ball 1181 , and the other end of the ball hinge element 118 is rod-shaped and is provided for accommodating The mounting slot 1182 of the top support bar 115 and the mounting block 117 are provided with four movable slots 1171 , and the movable balls 1181 of the four ball hinge elements 118 are respectively embedded in the four movable slots 1171 .

In addition, please refer to FIG. 4 , the above-mentioned fully enclosed monitoring device 100 for weighing lysimeter precision change also includes a waterproof shed 130 installed above the sealed box 110 . The waterproof shed 130 can realize all-weather testing of the accuracy monitoring of the large-scale weighing lysimeter 200 , so that the accuracy monitoring of the large-scale weighing lysimeter 200 is not affected by the weather.

The specific installation and monitoring methods of the fully enclosed monitoring device 100 for the accuracy change of the weighing lysimeter are as follows:

S1. Assemble the support frame 111 (see FIG. 1 ).

S2. Utilize the thousandth electronic balance to weigh the sealed box body 110 (support frame 111 and waterproof curtain 112) and connector 120 (first magnetic strip 121, second magnetic strip 122 and buckle 124), denoted as K ₁ ; weigh the double-sided tape, denoted as J ₁ ; weigh the adhesive tape 123, denote as M ₁ .

S3. After the weighing is completed, the support frame 111 is fixed on the weighing lysimeter 200 by using four buckles 124 .

S4, utilize double-sided tape to paste the second magnetic force strip 122 on the weighing type lysimeter 200 partition (outer side), paste the first magnetic force strip 121 on the waterproof curtain 112 (inside) from the lower edge 5cm place; The thousandth electronic balance weighs and measures the remaining amount of double-sided adhesive tape, which is recorded as J ₂ .

S5, set the waterproof curtain 112 outside the support frame 111, and fasten the first magnetic strip 121 on the waterproof curtain 112 (inside) and the second magnetic strip 122 on the outside of the weighing type lysimeter 200 partition, to ensure Sealing; after the operation is completed, utilize the adhesive tape 123 to stick the lower edge of the waterproof curtain 112 on the weighing type lysimeter 200 partition (outside), and carry out weighing measurement to the adhesive tape 123 remaining amount, mark it as M ₂ (see Fig. 2).

S6. Use the thousandth electronic balance to weigh and check the standard weight, which is recorded as F; determine the total weight of the fully enclosed weighing device G=K ₁ +(J ₁ -J ₂ )+(M ₁ -M ₂ )+F .

S7, build a waterproof shed 130 above the device, and fix it with a urn (see Figure 4).

S8. Set the weighing frequency of the lysimeter, every 10 minutes/time; record the change of the soil body L of the lysimeter + the total weight G of the weighing device, and record it as S; the relative error of the weighing data δ Accuracy change monitoring starts, otherwise, return to step S4, and fix the seal again.

S9. In order to eliminate the external interference on the lysimeter disturbance before and after the weight is placed, each time a standard weight F _n is placed, after the relative error of the weighing data δ≤5‰, start weighing, and record the weighing balance of the lysimeter data S _n ; after that, remove the standard weight F _n , and start weighing after the relative error of the weighing data δ≤5‰, and record the weighing balance data S _n+1 of the lysimeter, and the weighing weight of the lysimeter The code weight is denoted as F _n '(F _n '=S _n -S _n+ 1); a set of valid data is recorded as (F _n , F _n ').

S10. In order to ensure the validity of statistical data, add weighing weights in order from light to heavy, repeat step S9 100 times, and record 100 sets of valid data; through SPSS and other statistical analysis software, under the premise of significant confidence level, determine The error value Γ of the lysimeter accuracy change, where, F' is the average value of all standard weights weighed by electronic balance and lysimeter respectively.

In addition, the present application also provides an evapotranspiration measurement system, which includes a weighing lysimeter 200 and the above-mentioned fully enclosed monitoring device 100 for the accuracy change of the weighing lysimeter, and a fully enclosed monitoring device for the accuracy change of the weighing lysimeter The device 100 is detachably connected to the weighing lysimeter 200 . It can realize daily monitoring of changes in soil moisture, and can also quickly and easily realize changes in the weighing accuracy of regular monitoring instruments.

To sum up, the fully enclosed monitoring device 100 for the accuracy change of the weighing lysimeter provided by the embodiment of the utility model uses the sealed box 110 to be set on the outside of the weighing lysimeter 200 to realize the measurement of the weighing type lysimeter. The lysimeter 200 is in a sealed state, which reduces the misjudgment of the results caused by the influence of the external environment and water vapor exchange during the accuracy measurement process of the weighing lysimeter 200. 200 connection, so that the sealed box 110 can be quickly installed and disassembled, without affecting the daily monitoring of soil moisture changes by the weighing lysimeter 200, and at the same time, the change of the weighing accuracy of the regular monitoring instrument can be realized quickly and easily.

Compared with the traditional accuracy monitoring means, the fully enclosed monitoring device 100 for weighing lysimeter precision change provided by the embodiment of the utility model has simple structure, easy to obtain and manufacture materials, and convenient operation is one of its biggest advantages. In the actual application process, its technical effect is mainly reflected in the following points:

The weighing-type lysimeter precision change fully-enclosed monitoring device 100 provided by the embodiment of the utility model considers the universality and operability of the device and equipment, does not require any professional knowledge background for the experimenters, and utilizes the fully-enclosed design of the sealed box 110, The weighing lysimeter 200 can be kept isolated from the outside atmosphere during weighing, so as to ensure the weighing accuracy; the fully enclosed monitoring device 100 for the accuracy change of the weighing lysimeter can be quickly fixed to the weighing device through the connecting piece 120 On the lysimeter 200, the disturbance of the crosswind is avoided, and the operation is simple and fast; a waterproof shed 130 is installed above the fully enclosed device to realize the all-weather test of the precision monitoring of the large weighing lysimeter 200; In addition to the weight, the thousandth electronic balance is used to weigh fixed objects (such as iron blocks, airtight buckets and other easily accessible objects) as standard weighing samples for monitoring, which greatly facilitates the operability of the experiment.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. A fully enclosed monitoring device for weighing type lysimeter accuracy change, characterized in that it includes a sealed box and a connector, and the sealed box is used to be sleeved on the outside of the weighing type lysimeter so that The weighing-type lysimeter is in a closed state, and the connecting piece can connect the sealed box and the weighing-type lysimeter. 2. The weighing-type lysimeter precision change fully-enclosed monitoring device according to claim 1, characterized in that, the sealed box includes a supporting frame and a waterproof curtain, and the supporting frame can be installed on the weighing type lysimeter. Around and on the top of the lysimeter, the waterproof curtain is sheathed outside the support frame and connected to the weighing lysimeter through the connecting piece. 3. The weighing-type lysimeter precision change fully-enclosed monitoring device according to claim 2, characterized in that, the connector includes a mutual cooperation for connecting the waterproof curtain and the weighing-type lysimeter The first magnetic strip and the second magnetic strip, the first magnetic strip is pasted on the inside of the waterproof curtain, and the second magnetic strip is pasted on the outside of the weighing lysimeter. 4. The weighing-type lysimeter precision change fully-enclosed monitoring device according to claim 3 is characterized in that, the connecting piece also includes an adhesive tape, and the adhesive tape can stick the lower edge of the waterproof curtain on the External surface of a gravimetric lysimeter. 5. The weighing-type lysimeter precision change fully-closed monitoring device according to claim 2, characterized in that, the connector also includes a lap for connecting the supporting frame and the weighing-type lysimeter buckle. 6. The weighing-type lysimeter precision variation fully-enclosed monitoring device according to claim 2, characterized in that, the supporting frame includes side vertical rods, horizontal connecting rods and top surface supporting rods, and any two adjacent The side vertical rods are connected by the horizontal connecting rods to form a rectangular frame structure, and the top surface support rod is located on the top surface of the rectangular frame structure and connected with the side vertical rods. 7. The weighing-type lysimeter precision change fully-enclosed monitoring device according to claim 6, characterized in that, the side vertical rod and the horizontal connecting rod are hinged or detachably connected, and the top surface supports There are four rods, which are detachably connected to the four corners of the rectangular frame structure and meet at the center of the top surface of the rectangular frame structure. The four top support rods are all hinged on a ball with four openings. Hinge. 8. The weighing-type lysimeter precision variation fully-enclosed monitoring device according to claim 7, characterized in that, the spherical hinge includes a mounting block and four spherical hinge elements, and one end of the spherical hinge element is a movable The other end of the ball hinge element is rod-shaped and is provided with a mounting groove for accommodating the support rod on the top surface. The installation block is provided with four movable grooves. The four ball hinge elements The movable balls are respectively embedded in the four movable grooves. 9. The fully-enclosed monitoring device for weighing-type lysimeter accuracy change according to claim 1, characterized in that, the weighing-type lysimeter precision change fully-closed monitoring device also includes a waterproof shed installed on the waterproof The shed is arranged above the sealed box. 10. An evapotranspiration measurement system, characterized in that it comprises a weighing type lysimeter and a fully enclosed monitoring device for the accuracy change of the weighing type lysimeter as claimed in any one of claims 1-9, the weighing type lysimeter The fully enclosed monitoring device for the accuracy change of the heavy-type lysimeter is detachably connected with the weighing-type lysimeter.