A soil moisture measurement collection box for surface water-saving irrigation

Abstract

The utility model discloses a kind of soil moisture measurement collection boxes for surface water-saving irrigation, including PVC collection box, the inside of PVC collection box includes data collector, TDR time domain reflector, battery and coaxial split record switch board, the bottom of the data collector is electrically connected with TDR time domain reflector, the bottom of the TDR time domain reflector is electrically connected with coaxial split record switch board, the data collector, TDR time domain reflector and coaxial split record switch board are electrically connected with battery.8 TDR sensors are used in the utility model, longitudinal can be inserted in soil profile continuous measurement, transverse can be inserted in soil surface layer and divide 8 directions, measurement in batches, take the average of moisture content per unit area, precision improves, data collector and coaxial split record switch board are configured, can realize program automatic interval 3 minutes cycle collection moisture content data, degree of automation is high, battery and charger are configured, more suitable for field operation.

Description

Technical Field

[0001] This utility model relates to the field of soil moisture measurement technology, specifically to a soil moisture measurement and collection box for surface water-saving irrigation. Background Technology

[0002] Soil moisture monitoring technology is widely used in important monitoring projects in agriculture, water conservancy, meteorology, forestry, and ecology. Soil moisture measurement technology is a crucial technical guarantee for water-saving and drought-resistant implementation. Soil moisture measurement sensors and instruments used for surface water-saving irrigation are important technical means to achieve variable irrigation and soil moisture (drought) monitoring. With the continuous development of advanced technologies, soil moisture detection technologies, including TDR (Time Domain Reflectometry) and FDR (Frequency Domain Reflectometry), have been widely applied in soil moisture determination.

[0003] Among them, high-precision soil moisture sensors, less affected by soil texture, mainly employ the time-domain reflectometry (TDR) principle to measure the moisture content in soil. TDR is a newly developed method for measuring dielectric constant. A smart microelectronic time-domain emission source emits a high-frequency electromagnetic pulse (up to 1 GHz). This pulse generates an electromagnetic region along a metal rod acting as a waveguide and propagates within it. At the end of the guide, the pulse is reflected back to the source. Depending on the moisture content of the measured material, the propagation time (10 ps to 2 ns) and dielectric constant of the measurement result also vary. The dielectric constant of air is 1, the dielectric constant of solids is approximately 4, and the dielectric constant of pure water is approximately 80. Clearly, the dielectric constant of soil is mainly determined by its volumetric water content. The TDR principle calculates the soil moisture content by measuring changes in the soil's dielectric constant.

[0004] High-precision TDR soil moisture measuring instruments detect soil moisture content by directly contacting the soil with a probe. This measurement method is relatively simple to operate, but it has the following main drawbacks: it is mainly used indoors and requires a 220V power supply, so it cannot be used in the field. In addition, the data logger is a single-point measurement, meaning that one data logger can only connect to one sensor, resulting in a small number of data points collected at the same time and low efficiency.

[0005] Existing data acquisition devices are difficult to perform multi-point measurements simultaneously, and rainwater can easily seep into the device during rainy weather, causing damage. Furthermore, the devices lack fixing components when used outdoors. Therefore, they do not meet the current requirements. To address this, we propose a soil moisture measurement and acquisition box for surface water-saving irrigation. Utility Model Content

[0006] The purpose of this utility model is to provide a soil moisture measurement and collection box for surface water-saving irrigation, so as to solve the problems mentioned in the background art, such as the difficulty of the collector to perform multi-point measurement at the same time, the easy penetration of rainwater into the device during rainy weather causing damage to the device, and the lack of fixing components when the device is used outdoors.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a soil moisture measurement and acquisition box for surface water-saving irrigation, comprising a PVC acquisition box, wherein the PVC acquisition box contains a data acquisition unit, a TDR time domain reflector, a storage battery, and a coaxial entry switching board. The bottom of the data acquisition unit is electrically connected to the TDR time domain reflector, and the bottom of the TDR time domain reflector is electrically connected to the coaxial entry switching board. The data acquisition unit, the TDR time domain reflector, and the coaxial entry switching board are all electrically connected to the storage battery. Eight detection lines are movably connected to the bottom of the coaxial entry switching board, and each detection line is detachably connected to a TDR sensor. Handle mounting platforms are fixedly installed on both sides of the PVC acquisition box, and handles are rotatably installed on the bottom of each handle mounting platform.

[0008] Preferably, two L-shaped connecting plates are fixedly installed on the rear side of the PVC collection box. A vertical plate is fixedly installed on the top of each L-shaped connecting plate. The inner wall surface of each vertical plate is provided with a lifting groove. A rotating rod is rotatably installed on the inner side of each vertical plate. Both ends of the rotating rod are movably inserted into the lifting groove. A rain shield is fixedly installed on the surface of the rotating rod. Two elastic pads are provided at the bottom of the rain shield. The elastic pads are in contact with the top surface of the PVC collection box. A baffle is fixedly installed between the L-shaped connecting plates and the vertical plates.

[0009] Preferably, the bottom of the PVC collection box is connected to a support column by bolts, a base plate is fixedly installed at the bottom of the support column, and a soil-inserting drill bit is fixedly installed at the bottom of the base plate.

[0010] Preferably, both sides of the soil insertion drill bit are provided with sliding grooves, and a limiting rod is slidably installed inside the sliding groove. A connecting rod is rotatably connected to the inner side of the limiting rod. The bottom end of the base plate is provided with a support column bottom groove, and a connecting rod is slidably installed inside the support column bottom groove. A rotating shaft is rotatably installed on the bottom surface of the connecting rod. The two connecting rods are fixedly connected to the two ends of the rotating shaft. Both the support column bottom groove and the sliding groove are provided with rotating shaft slots, and both ends of the rotating shaft are movably engaged into the rotating shaft slots.

[0011] Preferably, a movable rod is fixedly installed at the top of the connecting rod, and a movable groove is provided on the surface of the support column. A push rod is slidably installed inside the movable groove. The push rod is rotatably connected to the movable rod. Two fixing plates are fixedly installed at the top of the push rod. Both fixing plates extend through the interior of the movable groove to the outside of the support column.

[0012] Preferably, the top and bottom surfaces of the movable groove are provided with limiting arc grooves, and the fixing plates are movably engaged into the interior of the limiting arc grooves through the movable groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model uses 8 TDR sensors, which can be inserted longitudinally into the soil profile for continuous measurement, and can be inserted laterally into the soil surface in 8 equal directions for measurement in multiple times, taking the average moisture content per unit area, thus improving accuracy. It is equipped with a data acquisition unit and a coaxial recording and switching board, which can realize automatic cyclic collection of moisture content data at 3-minute intervals, with a high degree of automation. It is also equipped with a battery and charger, making it more suitable for field operation.

[0015] 2. This utility model, through the cooperation of a rotating rod and a rain shield, allows the device to be used outdoors. When used on a sunny day, the rain shield can be rotated along the rotating rod as its axis to a vertical position. At this time, the rain shield can be pressed down, causing the rotating rod to descend along the lifting groove to the lowest position, thereby retracting the rain shield. When used on a rainy day, the rain shield can be pulled up, causing the rotating rod to rise along the lifting groove to the highest position. At this time, the rain shield can be rotated so that the elastic pad contacts the top of the PVC collection box. This allows the rain shield to protect the PVC collection box from rain, preventing water from entering the PVC collection box due to prolonged exposure to rain.

[0016] 3. This utility model, through the cooperation of the support column and the soil-inserting drill bit, allows the device to be used outdoors. The support column is installed at the bottom of the PVC collection box, and then the soil-inserting drill bit is inserted into the soil. At this point, pressing down on the fixing plate causes the fixing plate to drive the push rod, which in turn drives the connecting rod downwards. This causes the connecting rod to drive the linkage rod downwards. The limiting rod is then pushed out of the sliding groove by the lateral push of the linkage rod during its descent and becomes lodged in the soil, thus securing the limiting rod and the soil-inserting drill bit to the support column and preventing it from collapsing. When it is necessary to remove the device from the soil, the fixing plate can be raised to its highest point. The linkage rod will then pull the limiting rod back into the sliding groove, releasing the limitation on the soil-inserting drill bit, allowing the support column to be pulled upwards from the soil. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional front view of the entire utility model;

[0019] Figure 3 This is a partial cross-sectional side view of the entire utility model;

[0020] Figure 4 This utility model Figure 2 A partial structural diagram of part A in the middle;

[0021] Figure 5 This is a structural diagram of the soil longitudinal profile measurement using a longitudinally arranged sensor bracket according to this utility model;

[0022] Figure 6 This utility model utilizes a horizontally arranged sensor bracket to measure the soil surface layer in eight directions.

[0023] In the diagram: 1. PVC data acquisition box; 2. L-shaped connecting plate; 3. Vertical plate; 4. Rotating rod; 5. Rain shield; 6. Handle; 7. Handle mounting platform; 8. Lifting groove; 9. Baffle; 10. Elastic pad; 11. Detection line; 12. TDR sensor; 13. Support column; 14. Data acquisition unit; 15. TDR time domain reflector; 16. Battery; 17. Coaxial entry switching board; 18. Movable groove; 19. Limiting arc groove; 20. Base plate; 21. Soil drill bit; 22. Push rod; 23. Fixing plate; 24. Connecting rod; 25. Movable rod; 26. Support column bottom groove; 27. Rotating shaft; 28. Linkage rod; 29. ​​Limiting insertion rod; 30. Sliding groove; 31. Rotating shaft slot. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] The data acquisition device (model CR1000) and the TDR time domain reflector (model TDR100) mentioned in this utility model can be obtained from the market or through private customization.

[0026] Please see Figures 1 to 6This utility model provides an embodiment of a soil moisture measurement and acquisition box for surface water-saving irrigation, comprising a PVC acquisition box 1. The PVC acquisition box 1 contains a data acquisition unit 14, a TDR time domain reflector 15, a storage battery 16, and a coaxial recording switching board 17. The bottom of the data acquisition unit 14 is electrically connected to the TDR time domain reflector 15, and the bottom of the TDR time domain reflector 15 is electrically connected to the coaxial recording switching board 17. The data acquisition unit 14, the TDR time domain reflector 15, and the coaxial recording switching board 17 are all electrically connected to the storage battery 16. Eight detection lines 11 are movably connected to the bottom of the coaxial recording switching board 17, and TDR sensors 12 are detachably connected to the ends of the detection lines 11. Handle mounting platforms 7 are fixedly installed on both sides of the PVC acquisition box 1, and handles 6 are rotatably installed on the bottom of the handle mounting platforms 7.

[0027] By employing eight TDR sensors 12, the soil profile can be continuously measured longitudinally, and the surface layer can be divided into eight equal directions laterally for measurement. The average moisture content per unit area is taken, improving accuracy. The system is equipped with a data acquisition unit 14 and a coaxial recording switch 17, which can automatically collect moisture content data at 3-minute intervals, resulting in a high degree of automation. It is also equipped with a battery 16 and a charger, making it more suitable for field operations.

[0028] Two L-shaped connecting plates 2 are fixedly installed on the rear side of the PVC collection box 1. A vertical plate 3 is fixedly installed on the top of each L-shaped connecting plate 2. The inner wall surface of each vertical plate 3 is provided with a lifting groove 8. A rotating rod 4 is rotatably installed on the inner side of the vertical plate 3. Both ends of the rotating rod 4 are movably inserted into the lifting groove 8. A rain shield 5 is fixedly installed on the surface of the rotating rod 4. Two elastic pads 10 are provided at the bottom of the rain shield 5. The elastic pads 10 are in contact with the top surface of the PVC collection box 1. A baffle 9 is fixedly installed between the L-shaped connecting plate 2 and the vertical plate 3.

[0029] By cooperating with the rotating rod 4 and the rain shield 5, the device can be used outdoors. When used on a sunny day, the rain shield 5 can be rotated along the rotating rod 4 as the axis to a vertical position. At this time, the rain shield 5 can be pressed down, causing the rotating rod 4 to descend along the lifting groove 8 to the lowest position, thereby retracting the rain shield 5. When used on a rainy day, the rain shield 5 can be pulled up, causing the rotating rod 4 to rise along the lifting groove 8 to the highest position. At this time, the rain shield 5 can be rotated so that the elastic pad 10 contacts the top of the PVC collection box 1. This allows the rain shield 5 to protect the PVC collection box 1 from rain, preventing water from entering the PVC collection box 1 due to prolonged exposure to rain.

[0030] The bottom of the PVC collection box 1 is connected to a support column 13 by bolts. The bottom of the support column 13 is fixedly installed with a base plate 20. The bottom of the base plate 20 is fixedly installed with a soil insertion drill bit 21.

[0031] Both sides of the soil insertion drill bit 21 are provided with sliding grooves 30. Limiting rods 29 are slidably installed inside the sliding grooves 30. The inner side of the limiting rods 29 is rotatably connected with connecting rods 28. The bottom end of the base plate 20 is provided with a support column bottom groove 26. A connecting rod 24 is slidably installed inside the support column bottom groove 26. A rotating shaft 27 is rotatably installed on the bottom surface of the connecting rod 24. The two connecting rods 28 are fixedly connected to the two ends of the rotating shaft 27 respectively. The support column bottom groove 26 and the sliding groove 30 are both provided with rotating shaft slots 31. Both ends of the rotating shaft 27 are movably inserted into the rotating shaft slots 31.

[0032] With the cooperation of the support column 13 and the soil-inserting drill bit 21, when the device is used outdoors, the support column 13 is installed at the bottom of the PVC collection box 1, and then the soil-inserting drill bit 21 is inserted into the soil. At this time, the fixing plate 23 is pressed down, which causes the fixing plate 23 to drive the push rod 22 and then the connecting rod 24 to descend. This causes the connecting rod 24 to drive the linkage rod 28 to descend. At this time, the limiting rod 29 will be pushed out of the sliding groove 30 by the lateral push of the linkage rod 28 and then stuck into the soil, so as to realize the fastening of the limiting rod 29 and the soil-inserting drill bit 21 to the support column 13, thereby preventing the support column 13 from collapsing. When it is necessary to pull the device out of the soil, the fixing plate 23 can be raised to the highest point. At this time, the linkage rod 28 will pull the limiting rod 29 back into the sliding groove 30, releasing the limitation on the soil-inserting drill bit 21, and then the support column 13 can be pulled out of the soil.

[0033] A movable rod 25 is fixedly installed at the top of the connecting rod 24. A movable groove 18 is provided on the surface of the support column 13. A push rod 22 is slidably installed inside the movable groove 18. The push rod 22 is rotatably connected to the movable rod 25. Two fixing plates 23 are fixedly installed at the top of the push rod 22. Both fixing plates 23 extend through the inside of the movable groove 18 to the outside of the support column 13.

[0034] The top and bottom surfaces of the movable groove 18 are provided with limiting arc grooves 19, and the fixed plates 23 are all movably inserted into the limiting arc grooves 19 through the movable groove 18.

[0035] Depending on the soil measurement requirements, longitudinal or transverse support brackets can be used to connect and arrange the detection line 11 and the TDR sensor 12.

[0036] The longitudinally arranged bracket is made of aluminum alloy, with a cross-section of 30x30mm square rod and a length of 1 meter. There is a groove in the middle of the square rod, and there are 8 sets of fixing clips on the groove. Each fixing clip has a mounting hole at the bottom. The fixing clip is installed into the groove in the middle of the square rod by passing the mounting hole through the screw. The fixing clip is used to fix the eight longitudinal TDR sensors 12.

[0037] The horizontally arranged bracket is made of aluminum alloy, with a cross-section of 30x30mm square rods and a length of 0.5 meters. Eight square rods are welded together in a star shape. There is a groove in the middle of the square rod, and there are 8 sets of fixing clips on the groove. Each fixing clip has a mounting hole at the bottom. The fixing clips are installed into the groove in the middle of the square rod by passing the mounting hole through the mounting rod with a screw. The fixing clips are used to fix the eight horizontal TDR sensors 12.

[0038] When in use, this surface water-saving irrigation soil moisture measurement and acquisition box uses 8 TDR sensors 12, which can be inserted vertically into the soil profile for continuous measurement, and can be inserted horizontally into the soil surface in 8 equal directions for measurement in multiple times, taking the average moisture content per unit area, thus improving accuracy. It is equipped with a data acquisition unit 14 and a coaxial recording and switching board 17, which can realize the automatic collection of moisture content data at 3-minute intervals, with a high degree of automation. It is also equipped with a battery 16 and a charger, making it more suitable for field operation.

[0039] When used on a sunny day, the rain shield 5 can be rotated around the rotating rod 4 to the vertical direction. At this time, the rain shield 5 can be pressed down, so that the rotating rod 4 moves down along the lifting groove 8 to the lowest position, thereby retracting the rain shield 5.

[0040] When used in rainy weather, the rain shield 5 can be pulled upwards, so that the rotating rod 4 moves up along the lifting groove 8 to the highest position. At this time, the rain shield 5 can be rotated so that the elastic pad 10 contacts the top of the PVC collection box 1. At this time, the rain shield 5 can be used to protect the PVC collection box 1 from rain, so as to avoid water entering the PVC collection box 1 due to prolonged exposure to rain.

[0041] When the device is used outdoors, the support column 13 can be installed at the bottom of the PVC collection box 1, and then the soil drill bit 21 can be inserted into the soil. At this time, the fixing plate 23 can be pressed down, causing the fixing plate 23 to drive the push rod 22 and then drive the connecting rod 24 to descend. This causes the connecting rod 24 to drive the linkage rod 28 to descend. At this time, the limiting rod 29 will be pushed out of the sliding groove 30 by the lateral push of the linkage rod 28 when it descends, and then stuck into the soil. This achieves the fastening of the limiting rod 29 and the soil drill bit 21 to the support column 13, thereby preventing the support column 13 from collapsing.

[0042] When it is necessary to pull the device out of the soil, the fixing plate 23 can be raised to the highest point. At this time, the linkage rod 28 will pull the limiting rod 29 back into the sliding groove 30, releasing the limitation on the soil-inserting drill bit 21, and then the support column 13 can be pulled out of the soil.

[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A soil moisture measurement and collection box for surface water-saving irrigation, comprising a PVC collection box (1), characterized in that: The PVC acquisition box (1) includes a data acquisition unit (14), a TDR time domain reflector (15), a battery (16), and a coaxial entry switching board (17). The bottom of the data acquisition unit (14) is electrically connected to the TDR time domain reflector (15), and the bottom of the TDR time domain reflector (15) is electrically connected to the coaxial entry switching board (17). The data acquisition unit (14), the TDR time domain reflector (15), and the coaxial entry switching board (17) are all electrically connected to the battery (16). Eight detection lines (11) are movably connected to the bottom of the coaxial entry switching board (17). TDR sensors (12) are detachably connected to the ends of the detection lines (11). Handle mounting platforms (7) are fixedly installed on both sides of the PVC acquisition box (1), and handles (6) are rotatably installed on the bottom of the handle mounting platforms (7).

2. The soil moisture measurement and acquisition box for surface water-saving irrigation according to claim 1, characterized in that: Two L-shaped connecting plates (2) are fixedly installed on the rear side of the PVC collection box (1). A vertical plate (3) is fixedly installed on the top of each L-shaped connecting plate (2). A lifting groove (8) is provided on the inner wall surface of each vertical plate (3). A rotating rod (4) is rotatably installed on the inner side of the vertical plate (3). Both ends of the rotating rod (4) are movably inserted into the lifting groove (8). A rain shield (5) is fixedly installed on the surface of the rotating rod (4). Two elastic pads (10) are provided at the bottom of the rain shield (5). The elastic pads (10) are in contact with the top surface of the PVC collection box (1). A baffle (9) is fixedly installed between the L-shaped connecting plate (2) and the vertical plate (3).

3. The soil moisture measurement and acquisition box for surface water-saving irrigation according to claim 1, characterized in that: The bottom of the PVC collection box (1) is connected to a support column (13) by bolts. A base plate (20) is fixedly installed at the bottom of the support column (13). A soil-inserting drill bit (21) is fixedly installed at the bottom of the base plate (20).

4. A soil moisture measurement and acquisition box for surface water-saving irrigation according to claim 3, characterized in that: The soil-inserting drill bit (21) has sliding grooves (30) on both sides. Limiting rods (29) are slidably installed inside the sliding grooves (30). Connecting rods (28) are rotatably connected to the inner side of the limiting rods (29). The bottom end of the base plate (20) has a support column bottom groove (26). Connecting rods (24) are slidably installed inside the support column bottom groove (26). Rotating shafts (27) are rotatably installed on the bottom surface of the connecting rods (24). The two connecting rods (28) are fixedly connected to the two ends of the rotating shafts (27). Rotating shaft slots (31) are provided inside the support column bottom grooves (26) and the sliding grooves (30). Both ends of the rotating shafts (27) are movably inserted into the rotating shaft slots (31).

5. A soil moisture measurement and acquisition box for surface water-saving irrigation according to claim 4, characterized in that: A movable rod (25) is fixedly installed at the top of the connecting rod (24). The surface of the support column (13) is provided with a movable groove (18). A push rod (22) is slidably installed inside the movable groove (18). The push rod (22) is rotatably connected to the movable rod (25). Two fixing plates (23) are fixedly installed at the top of the push rod (22). The fixing plates (23) extend through the interior of the movable groove (18) to the outside of the support column (13).

6. A soil moisture measurement and acquisition box for surface water-saving irrigation according to claim 5, characterized in that: The top and bottom surfaces of the movable groove (18) are provided with limiting arc grooves (19), and the fixed plate (23) is movably inserted into the interior of the limiting arc groove (19) through the movable groove (18).

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