Water level monitoring device for rice planting

Abstract

The utility model relates to the technical field of water level monitoring, in particular to a water level monitoring device for rice planting, which comprises a water level detection cylinder, a righting component is mounted on the outer side of the water level detection cylinder, an extension plate is arranged at the top of the water level detection cylinder, and a distribution box is fixed on the upper side of the extension plate through screws. A photovoltaic panel is fixedly connected to the upper side of the distribution box, a main circuit board and a lithium battery electrically connected with the photovoltaic panel are fixed in the distribution box, a water level resistance detection circuit is arranged on the water level detection cylinder, the water level of the rice field is estimated by adopting a mode of intermittently measuring resistance between electrodes, so that the energy consumption of measuring the water level is greatly reduced; no movable elements such as floaters are arranged, the positioning rod is obliquely embedded into the deep soil of the rice field and matched with the leveling plate, inclination of the water level detection cylinder can be prevented, the water level monitoring reliability is improved, the photovoltaic panel can convert light energy into electric energy and store the electric energy into the lithium battery for standby application, and the water level monitoring device is low in cost and suitable for application and popularization.

Description

Technical Field

[0001] The utility model relates to the technical field of water level monitoring, in particular to a water level monitoring device used for rice planting. Background Art

[0002] Rice field water level measurement is an important device for realizing the intelligent rice irrigation system. For the irrigation of rice crops, its growth period can be divided into five periods: seedling stage, field rest stage, panicle development stage, filling stage and maturity stage. Different growth stages have different irrigation water level requirements and irrigation strategies to promote the healthy growth of rice. Rice field water level measurement mainly refers to measuring the water level above the ground surface;

[0003] Traditional rice field water level measurement mainly uses ultrasonic or laser water level measurement methods. Among them, ultrasonic water level measurement calculates the propagation distance of ultrasonic waves by detecting the time difference from the transmission of ultrasonic waves to the reception of reflected waves, and then derives water level data. This measurement method has the following main defects: 1. The propagation path of ultrasonic waves (i.e., the measurement channel) cannot be too narrow. When a circular measurement channel is used, its diameter cannot be less than 150mm, otherwise the measurement results will be inaccurate or impossible to measure due to multiple reflections of ultrasonic waves; 2. Since ultrasonic waves are invisible, when the ultrasonic generator is not perpendicular to the radial plane of the measurement channel, the reflection surface is not the water surface but the measurement channel wall, which causes measurement errors or false measurement results; 3. The power supply requirements are high and the price is high, which is not suitable for field use with miniaturized solar power supply; 4. The installation of ultrasonic water level measurement devices is complicated and cumbersome. Due to the large diameter, the surrounding seedlings are greatly damaged when buried, so it is not suitable for promotion and use;

[0004] Laser water level measurement calculates the propagation distance of ultrasound by detecting the time difference from the laser being sent to the reflected wave being received, and then derives the water level data. Compared with ultrasonic measurement, laser is visible and has good directionality, which can greatly reduce the diameter of the measurement channel. However, this measurement method has the following main defects: 1. The laser sensor must be installed on an adjustable plane to ensure that the laser beam is parallel to the axis of the measurement channel and irradiates the surface of the float on the water surface; 2. The laser beam is penetrating, and its measurement results cannot be predicted when it is directly irradiated on the water surface. Therefore, an opaque float must be placed on the water surface to ensure the accuracy of the measurement results. Since the float may sink into silt at low water levels, the float cannot be too small, so the diameter of the measurement channel is generally 40mm-50mm, which limits the miniaturization of the laser water level measurement device; 3. High price; 4. The installation of the laser water level measurement device is relatively complicated. The parallelism of the laser beam needs to be checked and adjusted each time it is installed. The float can be replaced. It is fully competent as a scientific research instrument, but it is not suitable for large-scale promotion and use.

[0005] In order to make up for the drawbacks of the above two water level monitoring methods, the utility model provides a water level monitoring device for rice planting to solve the above problems. Utility Model Content

[0006] The utility model aims to provide a water level monitoring device for rice planting, which solves the technical problem that the traditional rice planting method of using ultrasonic or laser to measure the water level has disadvantages.

[0007] The above technical objectives of the utility model are achieved through the following technical solutions:

[0008] A water level monitoring device for rice planting comprises a water level detection cylinder, a righting assembly is installed on the outer side of the water level detection cylinder, an extension plate is arranged on the top of the water level detection cylinder, a distribution box is fixed by screws on the upper side of the extension plate, a photovoltaic panel is fixedly connected to the upper side of the distribution box, a main circuit board and a lithium battery electrically connected to the photovoltaic panel are fixed in the distribution box, a water level resistance detection circuit is arranged on the water level detection cylinder, and the water level resistance detection circuit is electrically connected to the main circuit board.

[0009] Beneficial effects: The water level monitoring device used for rice planting estimates the water level in the rice field by intermittently measuring the resistance between electrodes, which greatly reduces the energy consumption of measuring the water level. There are no active components such as floats. The positioning rod is tilted and embedded in the soil deep in the rice field. Together with the adjustment plate, it can prevent the water level detection tube from tilting, thereby improving the reliability of water level monitoring. The photovoltaic panel can convert light energy into electrical energy and store it in lithium batteries for backup. It is low in cost and suitable for popularization and use.

[0010] Furthermore, the water level resistance detection circuit includes a common electrode, a sensing electrode and an ohmmeter located on the water level detection cylinder, the common electrode is located on one side of the water level detection cylinder, and multiple sensing electrodes are equidistantly distributed on the other side of the water level detection cylinder, and the lithium battery, ohmmeter, common electrode and at least one sensing electrode together constitute a detection circuit.

[0011] Furthermore, the righting assembly includes a plug embedded in the bottom port of the water level detection tube and a limiting ring fixedly mounted on the outer wall of the water level detection tube, at least three diagonal support rods are hinged on the outer side of the limiting ring, and positioning rods are arranged below the diagonal support rods. Threaded grooves are provided on adjacent end faces of the diagonal support rods and the positioning rods, and a double-headed screw rod is threadedly connected between the two threaded grooves. An anti-slip sleeve is fixedly mounted on the outer side of the middle part of the double-headed screw rod, and the bottom end of the positioning rod is a conical structure, and an adjusting plate is rotatably connected to the outer side of the bottom end, and a strip groove is provided on one side of the adjusting plate corresponding to the positioning rod.

[0012] Furthermore, an insert tube is fixedly sleeved on the outer wall of the bottom of the water level detection tube, the outer peripheral wall of the insert tube is densely covered with round holes, and filter nets are fixedly embedded in the round holes, and the bottom end of the insert tube is a cone-shaped structure.

[0013] Furthermore, a box door is hinged on one side of the distribution box, and a display screen for displaying the real-time water level of the rice field is fixedly embedded on the box door.

[0014] Furthermore, a signal transmitter and two warning lights are fixedly connected to the lower side of the photovoltaic panel, and the signal transmitter and the two warning lights are electrically connected to the main circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional diagram of a water level monitoring device for rice planting according to the utility model;

[0016] Figure 2 This is a side sectional view of a water level monitoring device for rice planting according to the utility model;

[0017] Figure 3 This is a module control diagram of a water level monitoring device for rice planting according to the utility model.

[0018] Figure numerals: 1. Water level detection cylinder; 11. Extension plate; 12. Common electrode; 13. Sensing electrode; 14. Ohmmeter; 15. Insertion tube; 16. Filter; 2. Straightening assembly; 21. Plug; 22. Limiting ring; 23. Diagonal support rod; 24. Positioning rod; 25. Threaded groove; 26. Double-headed screw; 27. Anti-slip sleeve; 28. Adjustment plate; 29. ​​Strip groove; 3. Distribution box; 31. Box door; 32. Display screen; 4. Photovoltaic panel; 41. Signal transmitter; 42. Alarm light; 5. Main circuit board; 6. Lithium battery. DETAILED DESCRIPTION

[0019] The following is only a preferred embodiment of the present invention, and the protection scope is not limited to this embodiment. All technical solutions under the concept of the present invention should belong to the protection scope of the present invention. At the same time, it should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

[0020] See Figures 1 to 3As shown, a water level monitoring device for rice planting comprises a water level detection tube 1, a righting assembly 2 is installed on the outer side of the water level detection tube 1, the righting assembly 2 comprises a plug 21 embedded in the bottom port of the water level detection tube 1 and a limit ring 22 fixedly sleeved on the outer wall of the water level detection tube 1, at least three diagonal support rods 23 are hinged on the outer side of the limit ring 22, and positioning rods 24 are arranged below the diagonal support rods 23, and thread grooves 25 are provided on the adjacent end surfaces of the diagonal support rods 23 and the positioning rods 24, and a double-headed screw rod 26 is threadedly connected between the two thread grooves 25, and an anti-slip sleeve 27 is fixedly sleeved on the outer side of the middle part of the double-headed screw rod 26, and the bottom end of the positioning rod 24 is a conical structure, and the outer side of the bottom end thereof is rotatably connected to an adjustment plate 28, and a strip groove 29 is provided on one side of the adjustment plate 28 corresponding to the positioning rod 24;

[0021] Specifically, during installation, the water level detection tube 1 is vertically inserted into the paddy field soil. The plug 21 can prevent the water level detection tube 1 from being excessively immersed in the soil. The diagonal support rod 23 is laterally unfolded, and then the anti-slip sleeve 27 is screwed. The double-headed screw 26 can gradually extend out of the threaded groove 25, so that the support length can be adjusted until the bottom end of the positioning rod 24 can penetrate into the soil. The adjustment plate 28 contacts the soil surface, which can prevent the water level detection tube 1 from tilting and keep the water level detection tube 1 in a vertical state, thereby ensuring the accuracy of the detection.

[0022] Furthermore, an insert tube 15 is fixedly sleeved on the bottom outer wall of the water level detection tube 1, and the outer peripheral wall of the insert tube 15 is densely covered with circular holes, and a filter screen 16 is fixedly embedded in each of the circular holes, and the bottom end of the insert tube 15 is a cone-shaped structure;

[0023] Specifically, the insert tube 15 serves to connect the inside and the outside, and an air hole is provided on the upper part of the insert tube 15. After the atmospheric pressure inside and outside the water level detection tube 1 is balanced, the water levels inside and outside are consistent. The filter net 16 can filter impurities in the water to prevent foreign matter from entering the water level detection tube 1 to interfere with the detection process. The water level detection tube 1 with a tapered end can be easily inserted into the soil.

[0024] Furthermore, an extension plate 11 is provided on the top of the water level detection tube 1, a distribution box 3 is screwed to the upper side of the extension plate 11, a box door 31 is hinged on one side of the distribution box 3, and a display screen 32 for displaying the real-time water level of the paddy field is fixedly embedded on the box door 31;

[0025] Specifically, the main circuit board 5 controls the display screen 32 to display the real-time water level of the paddy field, which can facilitate the staff to adjust the water level of the paddy field, and is intuitive and convenient.

[0026] Furthermore, a photovoltaic panel 4 is fixedly connected to the upper side of the distribution box 3, a main circuit board 5 and a lithium battery 6 electrically connected to the photovoltaic panel 4 are fixed in the distribution box 3, a signal transmitter 41 and two alarm lights 42 are fixedly connected to the lower side of the photovoltaic panel 4, and the signal transmitter 41 and the two alarm lights 42 are both electrically connected to the main circuit board 5;

[0027] Specifically, the main circuit board 5 can control the signal transmitter 41 to send real-time water level information to the control terminal, which can realize wireless transmission and is not restricted by terrain, greatly facilitating the monitoring process. If the real-time water level exceeds the safety standard, the main circuit board 5 controls the alarm light 42 to flash, which can facilitate the staff to replenish or discharge the water in time.

[0028] Furthermore, a water level resistance detection circuit is provided on the water level detection cylinder 1, and the water level resistance detection circuit is electrically connected to the main circuit board 5. The water level resistance detection circuit includes a common electrode 12, a sensing electrode 13 and an ohmmeter 14 located on the water level detection cylinder 1, the common electrode 12 is located on one side of the water level detection cylinder 1, and a plurality of the sensing electrodes 13 are equidistantly distributed on the other side of the water level detection cylinder 1, and the lithium battery 6, the ohmmeter 14, the common electrode 12 and at least one sensing electrode 13 together constitute a detection circuit;

[0029] Specifically, the sensing electrodes 13 are evenly spaced above and below, and the spacing between adjacent sensing electrodes 13 is 2cm-5cm. By utilizing the characteristic that the conductive resistance of water is much lower than the conductive resistance of air, when the water level in the water level detection tube 1 rises, the current always passes through the uppermost sensing electrode 13, resulting in a smaller resistance of the current passing through the common electrode 12 and the sensing electrode 13. The resistance change is reflected in the change in the reading of the ohmmeter 14, so that the main circuit board 5 can derive the scope of the current water level according to the detection result of the ohmmeter 14. Compared with the method of measuring the water level by ultrasound or laser, this structure is simpler and more reliable.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, 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

1. A water level monitoring device for rice planting, comprising a water level detection tube (1), characterized in that: A straightening assembly (2) is installed on the outside of the water level detection tube (1); an extension plate (11) is provided on the top of the water level detection tube (1); a distribution box (3) is screwed to the upper side of the extension plate (11); a photovoltaic panel (4) is fixedly connected to the upper side of the distribution box (3); a main circuit board (5) and a lithium battery (6) electrically connected to the photovoltaic panel (4) are fixed in the distribution box (3); a water level resistance detection circuit is provided on the water level detection tube (1); and the water level resistance detection circuit is electrically connected to the main circuit board (5).

2. A water level monitoring device for rice planting according to claim 1, characterized in that: The water level resistance detection circuit comprises a common electrode (12), a sensing electrode (13) and an ohmmeter (14) located on a water level detection cylinder (1); the common electrode (12) is located on one side of the water level detection cylinder (1); a plurality of sensing electrodes (13) are equidistantly distributed on the other side of the water level detection cylinder (1); and the lithium battery (6), the ohmmeter (14), the common electrode (12) and at least one sensing electrode (13) together form a detection circuit.

3. The water level monitoring device for rice planting according to claim 1, characterized in that: The straightening assembly (2) comprises a plug (21) embedded in the bottom port of the water level detection tube (1) and a limit ring (22) fixedly sleeved on the outer wall of the water level detection tube (1); at least three diagonal support rods (23) are hinged on the outer side of the limit ring (22); a positioning rod (24) is arranged below each of the diagonal support rods (23); a thread groove (25) is provided on the adjacent end faces of the diagonal support rod (23) and the positioning rod (24); a double-headed screw rod (26) is threadedly connected between the two thread grooves (25); an anti-slip sleeve (27) is fixedly sleeved on the outer side of the middle part of the double-headed screw rod (26); the bottom end of the positioning rod (24) is a conical structure, and the outer side of the bottom end is rotatably connected to an adjustment plate (28); a strip groove (29) is provided on one side of the adjustment plate (28) corresponding to the positioning rod (24).

4. The water level monitoring device for rice planting according to claim 1, characterized in that: The bottom outer wall of the water level detection cylinder (1) is fixedly sleeved with an insert cylinder (15), the outer peripheral wall of the insert cylinder (15) is densely covered with circular holes, and filter screens (16) are fixedly embedded in the circular holes, and the bottom end of the insert cylinder (15) is in a conical structure.

5. The water level monitoring device for rice planting according to claim 1, characterized in that: A box door (31) is hinged on one side of the distribution box (3), and a display screen (32) for displaying the real-time water level of the paddy field is fixedly embedded on the box door (31).

6. The water level monitoring device for rice planting according to claim 1, characterized in that: A signal transmitter (41) and two warning lights (42) are fixedly connected to the lower side of the photovoltaic panel (4), and the signal transmitter (41) and the two warning lights (42) are both electrically connected to the main circuit board (5).

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