A test device for simulating the drainage lag process of farmland

Abstract

The utility model belongs to the field of agricultural simulation test device provides a kind of test device simulating farmland drainage lag process, comprising: soil box and the soil placed in soil box, for simulating farmland irrigation drainage;Water supply mechanism is set up on soil box, for simulating water supply irrigation to soil box;Drainage mechanism is set up on soil box, for simulating drainage in soil box;Collection mechanism is set up at soil box side, for collecting water potential variation data in soil box;When water supply bucket water supply, drainage bucket carries out collection drainage and water potential variation in soil box, can respectively pass two water pressure sensors and several soil water potential sensors, monitoring data is transmitted to data collector, is analyzed and handled by data collector, to this auxiliary scientific researcher analyzes the water dynamic characteristic and lag law of simulated farmland irrigation drainage.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural simulation test devices, specifically a test device for simulating the lag process of farmland drainage. Background Technology

[0002] The lag in farmland irrigation and drainage refers to the significant time delay in the process of water entering the soil (infiltration) and excess water being discharged from the soil (drainage) after irrigation or rainfall. This delay is not instantaneous but requires a certain amount of time to achieve the desired effect.

[0003] However, there are many factors that affect the lag time of farmland irrigation and drainage, making it difficult to conduct research on the lag of farmland drainage through field experiments.

[0004] To address this issue, those skilled in the art have proposed an experimental device to simulate the delayed process of farmland drainage. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides an experimental device for simulating the delayed process of farmland drainage, thereby solving the problem that the delayed nature of farmland irrigation and drainage is difficult to test and study on-site in the prior art.

[0006] An experimental device for simulating the lag process of farmland drainage includes: a soil box and soil placed inside the soil box for simulating farmland irrigation and drainage; a water supply mechanism set on the soil box for simulating water supply to the soil box for simulating irrigation; a drainage mechanism set on the soil box for simulating drainage inside the soil box; and a data acquisition mechanism set on the side of the soil box for acquiring data on water potential changes inside the soil box.

[0007] Preferably, the water supply mechanism includes an irrigation simulator fixedly installed on the top of the soil tank, a water supply tank fixedly installed on the top of the irrigation simulator, and a water supply valve fixedly installed on the water supply tank.

[0008] Preferably, the drainage mechanism includes a metal mesh fixedly installed on one side of the soil tank sidewall, a retaining plate fixedly installed on the outer wall of the metal mesh, and a plurality of drainage holes opened on the retaining plate; a drainage trough fixedly installed on the outer wall of the retaining plate, a drainage bucket fixedly installed on the drainage trough, and a drainage valve fixedly installed on the drainage bucket; and the drainage bucket is located below the soil tank.

[0009] Preferably, the data acquisition mechanism includes a data acquisition unit disposed on the side of the soil tank, and a plurality of soil water potential sensors are fixedly disposed inside the soil tank; and the plurality of soil water potential sensors are electrically connected to the data acquisition unit via data cables.

[0010] Preferably, the data acquisition mechanism further includes water pressure sensors fixedly installed in the water supply tank and the water drain tank, and both water pressure sensors are electrically connected to the data acquisition device via data cables.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] This invention features a soil tank containing soil for simulating farmland experiments. It includes a water supply tank and a drainage tank. The water supply tank works with an irrigation simulator to simulate an irrigation system supplying water to the soil tank. Water from the soil tank is drained through drainage holes on a retaining plate and into the drainage tank for collection. During water supply, drainage, and changes in water potential within the soil tank, monitoring data is transmitted to a data acquisition unit via two water pressure sensors and several soil water potential sensors. The data acquisition unit analyzes and processes the data to assist researchers in analyzing the hydrodynamic characteristics and hysteresis patterns of simulated farmland irrigation and drainage. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the experimental device of this utility model;

[0014] Figure 2 This is a diagram illustrating the structure of the soil box of this utility model;

[0015] Figure 3 This is a structural diagram of the water supply tank connection of this utility model;

[0016] Figure 4 This is a structural diagram of the drainage bucket of this utility model.

[0017] In the picture:

[0018] 1. Data acquisition unit; 2. Soil water potential sensor; 3. Water pressure sensor; 4. Water supply tank; 5. Irrigation simulator; 6. Metal mesh; 7. Retaining plate; 8. Drainage trough; 9. Drainage valve; 10. Drainage tank; 11. Drainage hole; 12. Water supply valve; 13. Soil tank; 14. Soil. Detailed Implementation

[0019] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0020] Example 1:

[0021] As attached Figure 1 To be continued Figure 4 As shown:

[0022] This utility model provides an experimental device for simulating the lag process of farmland drainage, including: a soil box 13 and soil 14 placed inside the soil box 13 for simulating farmland irrigation and drainage; a water supply mechanism disposed on the soil box 13 for simulating water supply to the soil box 13 for simulating irrigation; a drainage mechanism disposed on the soil box 13 for simulating drainage inside the soil box 13; and a data collection mechanism disposed on the side of the soil box 13 for collecting water potential change data inside the soil box 13.

[0023] By setting up a soil tank 13, soil 14 can be placed inside the soil tank 13 to simulate farmland for experiments. A water supply tank 4 and a drainage tank 10 are also set up, so that the water supply tank 4 can work with the irrigation simulator 5 to simulate the irrigation system to supply water to the soil tank 13. The water in the soil tank 13 can be discharged into the drainage tank 10 through several drainage holes 11 on the retaining plate 7 and drainage channels 8. When the water supply tank 4 supplies water, the drainage tank 10 collects and drains water, and the water potential in the soil tank 13 changes, the monitoring data can be transmitted to the data acquisition unit 1 through two water pressure sensors 3 and several soil water potential sensors 2, respectively. The data acquisition unit 1 analyzes and processes the data to assist researchers in analyzing the hydrodynamic characteristics and lag patterns of the simulated farmland irrigation and drainage.

[0024] Meanwhile, the water supply bucket 4, irrigation simulator 5, soil box 13, retaining plate 7, drainage ditch 8 and drainage bucket 10 are all made of transparent materials, which makes it easy for researchers to observe the simulated farmland drainage lag process experiment.

[0025] refer to Figure 1 , Figure 2 and Figure 3 The water supply system includes an irrigation simulator 5 and a water supply tank 4;

[0026] By setting a water supply tank 4 at the top of the soil box 13, water for simulated irrigation of farmland can be stored inside the water supply tank 4. An irrigation simulator 5 is fixedly connected to the top of the soil box 13, and the water supply tank 4 and the irrigation simulator 5 are fixedly connected to each other. Thus, when the soil box 13 conducts a farmland drainage lag test, water can be delivered from the water supply tank 4 to the irrigation simulator 5, and then the irrigation simulator 5 simulates the rainfall state to irrigate the soil 14 in the soil box 13, thereby achieving the state of farmland water supply when the soil box 13 simulates the water supply of farmland.

[0027] Meanwhile, a water supply valve 12 is fixedly connected to the water supply tank 4, so that the water supply tank 4 can be switched on and off by the water supply valve 12 when supplying water to the irrigation simulator 5, so that the water supply tank 4 can supply water in a controlled manner according to the test requirements.

[0028] refer to Figure 1 The drainage system includes a drainage trough 8, a metal mesh 6, a retaining plate 7, and a drainage bucket 10.

[0029] By fixing a retaining plate 7 to the side wall of the soil box 13 and fixing a metal mesh 6 between the side wall of the soil box 13 and the retaining plate 7, the metal mesh 6 can block the soil 14 in the soil box 13, thereby preventing the soil 14 in the soil box 13 from flowing out from the side of the retaining plate 7. Several drainage holes 11 are opened on the retaining plate 7, and the irrigation water in the soil box 13 can flow out through the drainage holes 11. A drainage trough 8 is fixedly connected to the outer wall of the retaining plate 7, so that the water flowing out of the drainage holes 11 in the soil 14 can be stored in the drainage trough 8.

[0030] Meanwhile, a drainage bucket 10 is fixedly connected to the drainage trough 8, and a drainage valve 9 is fixedly connected to the drainage bucket 10. When the water in the soil tank 13 needs to be discharged, the drainage valve 9 can be opened so that the water in the soil tank 13 is first discharged into the drainage trough 8 through several drainage holes 11, and then discharged into the drainage bucket 10 for collection and treatment. In this way, the drainage valve 9 can control the water in the drainage trough 8 to be discharged into the drainage bucket 10.

[0031] Secondly, the drainage bucket 10 is located below the soil box 13 so that the water in the soil box 13 can be smoothly drained into the drainage bucket 10.

[0032] Example 2:

[0033] refer to Figure 1 The data acquisition mechanism includes a data acquisition unit 1, a soil water potential sensor 2, and a water pressure sensor 3.

[0034] By installing a data acquisition device 1 on the side of the soil tank 13, the data acquisition device 1 can determine the distribution of the hydrodynamic field in the soil 14 based on the water potential in the soil 14. Several soil water potential sensors 2 are fixedly connected inside the soil tank 13 and are all fixedly placed inside the soil 14. When the water supply tank 4 supplies water to the soil tank 13 and the soil tank 13 drains water into the drainage trough 8, the changes in the water potential in the soil 14 are recorded in real time by the several soil water potential sensors 2. The data information recorded by the soil water potential sensors 2 is then synchronously transmitted to the data acquisition device 1 through several data lines, and the data acquisition device 1 judges and analyzes the changes in the distribution of the hydrodynamic field in the soil 14.

[0035] Meanwhile, water pressure sensors 3 are fixedly connected inside both the water supply tank 4 and the drainage tank 10. This allows the water pressure sensors 3 inside the water supply tank 4 to automatically record the changes in water pressure inside the water supply tank 4 when it drains water into the irrigation simulator 5 and the soil box 13. The data is then synchronously transmitted to the data acquisition unit 1 via a data cable. This enables the data acquisition unit 1 to calculate the amount of irrigation water in the water supply tank 4 at different times based on the changes in water pressure inside the water supply tank 4.

[0036] Secondly, the water pressure sensor 3, which is fixedly connected inside the drainage bucket 10, can automatically record the water pressure changes inside the drainage bucket 10 when the drainage valve 9 is opened and water from the soil box 13 and the drainage trough 8 is discharged into the drainage bucket 10. The data is then synchronously transmitted to the data acquisition unit 1 via a data cable. The data acquisition unit 1 calculates the amount of water discharged at different times based on the water pressure changes inside the drainage bucket 10. This allows the data acquisition unit 1 to assist researchers in analyzing and simulating the hydrodynamic characteristics and lag patterns of farmland irrigation and drainage based on the irrigation volume in the water supply bucket 4, the drainage volume in the drainage bucket 10, and the changes in the water potential of the soil 14 in the soil box 13.

[0037] Working principle: A soil tank 13 is set up, and soil 14 is loaded inside the soil tank 13. Several soil water potential sensors 2 are fixedly connected inside the soil tank 13. The soil water potential sensors 2 are electrically connected to the data acquisition unit 1 via data cables. In the simulation of farmland drainage lag test, water in the water supply tank 4 is first controlled to be delivered to the irrigation simulator 5 through the water supply valve 12. The water pressure sensor 3 in the water supply tank 4 can monitor the water pressure in the water supply tank 4 in real time and transmit the water pressure change data in the water supply tank 4 to the data acquisition unit 1 for analysis and processing. This allows the data acquisition unit 1 to determine the water supply of the water supply tank 4 at different times based on the value of the water pressure sensor 3 in the water supply tank 4. At the same time, the soil water potential sensor 2 is connected to the data acquisition unit 1 via the soil tank 13. The irrigation simulator 5 simulates an irrigation system. Several soil water potential sensors 2 inside the soil tank 13 detect changes in soil moisture and electrical conductivity over time. The monitoring data from the soil water potential sensors 2 is transmitted in real time to the data acquisition unit 1 for analysis and processing. Next, when the water inside the soil tank 13 is drained into the drainage trough 8 and then flows into the drainage bucket 10, the water pressure sensor 3 inside the drainage bucket 10 can obtain the drainage water pressure data at different times. The real-time monitored data is then transmitted to the data acquisition unit 1 for analysis and processing to obtain the drainage volume at different times in the drainage bucket 10. Finally, the water pressure sensor 3 inside the water supply bucket 4 and the soil water potential sensors 2 inside the drainage bucket 10 are used for comprehensive analysis and processing.

[0038] The embodiments of this utility model are given for the purpose of illustration and description. Although embodiments of this utility model have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the utility model. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this utility model.

[0039] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0040] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0041] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0042] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An experimental device for simulating the lag process of farmland drainage, characterized in that, include: Soil box (13) and soil (14) placed inside soil box (13) are used to simulate farmland irrigation and drainage; A water supply mechanism is installed on the soil box (13) and is used to simulate water supply for irrigation into the soil box (13); A drainage mechanism is installed on the soil box (13) for simulating drainage inside the soil box (13); The data acquisition mechanism is located on the side of the soil box (13) and is used to collect data on water potential changes inside the soil box (13).

2. The experimental apparatus for simulating the delayed process of farmland drainage as described in claim 1, characterized in that: The water supply mechanism includes an irrigation simulator (5) fixedly installed on the top of the soil box (13), a water supply tank (4) fixedly installed on the top of the irrigation simulator (5), and a water supply valve (12) fixedly installed on the water supply tank (4).

3. The experimental apparatus for simulating the delayed process of farmland drainage as described in claim 1, characterized in that: The drainage mechanism includes a metal mesh (6) fixedly installed on one side of the side wall of the soil box (13), and a retaining plate (7) fixedly installed on the outer wall of the metal mesh (6), and a plurality of drainage holes (11) are provided on the retaining plate (7). A drainage trough (8) is fixedly installed on the outer wall of the retaining plate (7), a drainage bucket (10) is fixedly installed on the drainage trough (8), and a drainage valve (9) is fixedly installed on the drainage bucket (10). The drainage bucket (10) is located below the soil box (13).

4. The experimental apparatus for simulating the delayed process of farmland drainage as described in claim 3, characterized in that: The data acquisition mechanism includes a data acquisition unit (1) located on the side of the soil box (13), and several soil water potential sensors (2) are fixedly installed inside the soil box (13); Furthermore, several of the soil water potential sensors (2) are electrically connected to the data acquisition unit (1) via data lines.

5. The experimental apparatus for simulating the delayed process of farmland drainage as described in claim 4, characterized in that: The data acquisition mechanism also includes water pressure sensors (3) fixedly installed in the water supply tank (4) and the drainage tank (10). Both water pressure sensors (3) are electrically connected to the data acquisition device (1) via data cables.

Images