Use method of drip sensing rainfall detection device

Abstract

The invention discloses a use method of a drop-sensitive rainfall detection device, and the method comprises the steps: simulating water drops formed under different rainfall conditions in the drop-sensitive rainfall detection device according to a preset rainfall gradient, and obtaining the length of the dripping moment of the water drops and the volume corresponding to the water drops; detecting the rainfall condition of a target area in real time by using the drip-sensitive rainfall detection device, acquiring the length of the dripping moment of water drops formed in the drip-sensitive rainfall detection device, and recording according to the dripping time sequence; and by comparing the length of the dripping moment of the water drops formed in the target area with the length of the dripping moment of the water drops formed under the condition that different rainfall is simulated in the drip-sensitive rainfall detection device, the volume of the water drops formed in the drip-sensitive rainfall detection device in the target area is obtained, and the rainfall in the target area is calculated. The laser module is used for measuring the length of the water drop at the dripping moment, the volume of the water drop is calibrated, and the measurement accuracy is improved.

Description

[0001] This application is a divisional application of application number 2022111695992, filed on September 22, 2022, and named “A drop-sensing rainfall detection device”. Technical Field

[0002] The present invention relates to the technical field of rainfall detection, and in particular to a method for using a drop-sensing rainfall detection device. Background Art

[0003] Rainfall monitoring can record rainfall data in real time. This data can be used to determine precipitation levels in different regions, providing guidance for agricultural irrigation. Precipitation significantly impacts various aspects of human life and production. Excessive rainfall can lead to natural disasters such as floods, landslides, and mudslides, as well as significant economic losses and inconvenience to production and life. Excessive rainfall can increase the demand for water for domestic use, agricultural irrigation, and industrial use, leading to salinization or desertification. The significance of installing a rainfall monitoring system is to promptly integrate past rainfall data and make adjustments to minimize the harm caused by rainfall.

[0004] To ensure high accuracy and comparability of precipitation measurements, meteorological observation standards stipulate that precipitation refers to the depth of liquid or solid (after melting) precipitation that falls from the sky to the ground and accumulates on a horizontal surface without evaporation, infiltration, or loss. Precipitation is measured in millimeters. Traditional precipitation measurement instruments can be categorized by principle as tipping bucket rain gauges, weighing rain gauges, and piezoelectric rain gauges. Traditional precipitation measurement instruments are bulky, have low detection accuracy, and are difficult to integrate with other electronic components for rainfall measurement.

[0005] In view of this, overcoming the defects of the prior art is an urgent problem to be solved in this technical field. Summary of the Invention

[0006] The purpose of the present invention is to overcome the problems of existing rain gauges for measuring rainfall, such as large size, low measurement accuracy and difficulty in integration with other devices.

[0007] The present invention is achieved in that:

[0008] In a first aspect, the present invention provides a drop-sensing rain detection device, comprising an outer cylinder, a rain gauge base, a drainage plate, a water drop counter, and a laser module;

[0009] The outer cylinder is provided with upper and lower openings, a guide plate is provided at the middle portion of the inner portion of the outer cylinder, a dripping port is provided at the center of the guide plate, and the guide plate is provided downward along the dripping port at a first preset angle;

[0010] The rain gauge base is arranged below the drainage plate, and includes a rain gauge support column and a rain gauge bottom plate. The lower end of the rain gauge support column is arranged at the center of the rain gauge bottom plate. A first through hole is provided at the center of the rain gauge bottom plate. A vertical axial drainage channel is provided in the rain gauge support column. The diameter of the drainage channel is larger than the diameter of the drip outlet. The drainage channel, the drip outlet and the first through hole are arranged on the same vertical axis to form a water drop counting channel.

[0011] The side wall of the rain gauge support column is provided with a second mounting hole, and the water drop counter is arranged in the second mounting hole, perpendicular to the trajectory of the falling water droplets and intersecting at a point, so as to count the falling water droplets;

[0012] The laser module is arranged directly above the center of the drainage plate and aligned with the drip outlet. The laser module emits a laser signal to detect the length of a water droplet at the drip outlet at the moment of falling, and obtains the volume of the water droplet through the relationship between the length of the water droplet at the moment of falling and the volume of the water droplet.

[0013] Preferably, it also includes a splash-proof cone, the cone angle of which is set upward at a second preset angle, the bottom of the splash-proof cone is provided with at least two mounting columns in the vertical direction, and the guide plate is provided with at least two first mounting holes, the mounting columns match the first mounting holes, and the mounting columns are inserted into the first mounting holes so that the bottom of the splash-proof cone is suspended at a preset height from the upper surface of the guide plate.

[0014] Preferably, the interior of the anti-splash cone is hollow, and a support frame is provided inside the anti-splash cone, and the support frame is used to fix the laser module.

[0015] Preferably, it further comprises a circuit board, which is arranged between the drainage plate and the rain gauge support column, and the circuit board is electrically connected to the water drop counter and the laser module.

[0016] Preferably, the upper surface of the guide plate is provided with lines, and rainwater flows evenly to the edges of the drip outlet through the lines, so that raindrops form water droplets on the lower surface of the drip outlet.

[0017] Preferably, it also includes a rain gauge bottom cover, the upper surface of the rain gauge bottom cover is provided with a mounting groove, the lower part of the outer cylinder is inserted into the mounting groove, the rain gauge bottom cover is provided with a protrusion, and a third mounting hole is provided in the protrusion, and the third mounting hole is used to fix the rain gauge detection device.

[0018] Preferably, the first preset angle is less than or equal to 15° and greater than or equal to 5°; the second preset angle is less than or equal to 95° and greater than or equal to 70°.

[0019] Preferably, the drip outlet is cylindrical, and the diameter of the drip outlet is greater than or equal to 3 mm and less than or equal to 6 mm.

[0020] In a second aspect, the present invention, based on the drip-sensing rain detection device, further proposes a method for using the drip-sensing rain detection device, comprising:

[0021] According to the preset rainfall gradient, water droplets formed under different rainfall conditions are simulated in the drop-sensing rainfall detection device, and the length of the water droplet at the moment of falling and the corresponding volume of the water droplet are obtained;

[0022] Using the droplet-sensing rain detection device to detect the rainfall in the target area in real time, obtaining the length of the water droplets formed in the droplet-sensing rain detection device at the moment of falling, and recording them in the order of the time of falling;

[0023] By comparing the length of the water droplets formed in the target area at the moment of falling with the length of the water droplets formed under different rainfall conditions simulated in the drop-sensing rain detection device, the volume of the water droplets formed in the drop-sensing rain detection device in the target area is obtained, and the rainfall in the target area is calculated.

[0024] Preferably, the length of the water droplet at the moment of falling and the volume of the water droplet are obtained by taking an average value, which specifically includes:

[0025] Set a preset number of water drops, use a water drop counter to detect the process of water drops falling, and after the time intervals between adjacent water drops are equal, use a laser module to detect the length of the water drops at the moment of falling;

[0026] By taking the average value, the average length of the water drop at the moment of falling is calculated, and the corresponding average volume of the water drop is measured using a measuring instrument.

[0027] The present invention provides a laser module to measure the length of raindrops collected by a droplet-sensing rainfall detection device at the moment they form water droplets and fall from a dripping outlet, so as to calibrate the volume of the water droplets and thereby improve the accuracy of rainfall detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A schematic diagram of the shape of a water droplet dripping from a dripping spout according to an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of the overall structure of a drop-sensing rainfall detection device provided by an embodiment of the present invention;

[0031] Figure 3 A schematic cross-sectional view of a drop-sensing rainfall detection device provided by an embodiment of the present invention;

[0032] Figure 4 A schematic diagram of the structure of a rain gauge base of a drop-sensing rain gauge detection device provided by an embodiment of the present invention;

[0033] Figure 5 A schematic diagram of the structure of a rainfall base plate of a drop-sensing rainfall detection device provided by an embodiment of the present invention;

[0034] Figure 6 A schematic diagram of the splash cone structure of a drop-sensing rainfall detection device provided by an embodiment of the present invention;

[0035] Figure 7 A schematic diagram of a specific structure of a support frame of a drop-sensing rainfall detection device provided by an embodiment of the present invention;

[0036] Figure 8 A schematic diagram of the circuit board position structure of a drop-sensing rainfall detection device provided by an embodiment of the present invention;

[0037] Figure 9 A top view of a drainage plate of a drip-sensing rainfall detection device provided by an embodiment of the present invention;

[0038] Figure 10 A schematic diagram of the structure of a rainfall bottom cover of a drop-sensing rainfall detection device provided by an embodiment of the present invention;

[0039] Figure 11 A flowchart of a method for using a drop-sensing rainfall detection method provided by an embodiment of the present invention;

[0040] Figure 12 A flowchart of a method for using a drop-sensing rainfall detection device provided by an embodiment of the present invention;

[0041] Wherein, the accompanying drawings are marked as follows:

[0042] 1-outer cylinder; 11-cutting edge; 2-rain gauge base; 21-rain gauge support column; 211-drainage channel; 212-second mounting hole; 22-rain gauge bottom plate; 221-first through hole; 3-drainage plate; 31-drip port; 32-first mounting hole; 33-texture; 4-water drop counter; 5-laser module; 6-splash cone; 61-mounting column; 62-support frame; 7-circuit board; 8-rain gauge bottom cover; 81-mounting slot; 82-protrusion; 821-third mounting hole. DETAILED DESCRIPTION

[0043] In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "upper", "lower", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0045] Example 1:

[0046] The embodiment of the present invention provides a drop-sensing rain detection device, comprising an outer cylinder 1, a rain gauge base 2, a drainage plate 3, a water drop counter 4, and a laser module 5;

[0047] The outer tube 1 is provided with upper and lower openings, and a guide plate 3 is provided in the middle portion of the inner portion of the outer tube 1. A dripping port 31 is provided at the center of the guide plate 3. The guide plate 3 is provided downward along the dripping port 31 at a first preset angle.

[0048] The rain gauge base 2 is arranged below the drainage plate 3. The rain gauge base 2 includes a rain gauge support column 21 and a rain gauge bottom plate 22. The lower end of the rain gauge support column 21 is arranged at the center of the rain gauge bottom plate 22. A first through hole 221 is provided at the center of the rain gauge bottom plate 22. A vertical axial drainage channel 211 is provided in the rain gauge support column 21. The diameter of the drainage channel 211 is larger than the diameter of the dripping port 31. The drainage channel 211, the dripping port 31 and the first through hole 221 are arranged on the same vertical axis to form a channel for counting water drops.

[0049] The side wall of the rain gauge support column 21 is provided with a second mounting hole 212, and the water drop counter 4 is arranged in the second mounting hole 212, perpendicular to the trajectory of the falling water droplets and intersecting at one point, so as to count the falling water droplets;

[0050] The laser module 5 is arranged just above the center of the guide plate 3 and aligned with the drip outlet 31. The laser module 5 emits a laser signal to detect the length of a water drop formed at the drip outlet 31 at the moment of dripping, and obtains the volume of the water drop through the relationship between the length of the water drop at the moment of dripping and the volume of the water drop.

[0051] like Figure 1As shown, it is a schematic diagram showing the shape of a water droplet at the moment it drips from the drip outlet, wherein, in order to more clearly see the shape of the water droplet, the water film layer formed at the drip outlet is not drawn. Raindrops form water droplets at the drip outlet 31 and detach from the drip outlet 31, dripping into the drainage channel 211. In this process, based on the tension inside the water droplet, the shape of the water droplet will undergo a series of changes. First, after the raindrops converge to form water droplets, the length of the water droplet in the vertical direction (direction of gravity) will become longer. When it reaches the maximum value (corresponding to the moment the water droplet falls), the water droplet will detach from the drip outlet 31, and then be affected by the internal tension of the water droplet, and the water droplet will rebound. Theoretically speaking, the moment the water droplet falls corresponds to the moment when the vertical length of the water droplet is the largest, and the volume of the water droplet corresponds one to one to the length of the water droplet at the moment it falls.

[0052] In actual application scenarios, different rainfall conditions and different raindrop states will affect the volume of water droplets when they fall, causing the instantaneous length of the water droplets to change. Therefore, it cannot be assumed that the volume of each droplet remains unchanged during the falling process. Currently, the rainfall is calculated by multiplying the number of raindrops by a fixed volume. From the above analysis, it can be seen that the volume of water droplets is different under different conditions, and the method of using a fixed volume to calculate rainfall has the problem of inaccurate detection.

[0053] In order to solve the aforementioned problem, in this embodiment, when a droplet-sensing rain detection device is used to detect the amount of rain in a target area, the length of the water droplet at the moment of falling is measured by a laser module 5 arranged in the detection device, and the actual volume of the water droplet is obtained through the relationship between the volume of the water droplet and the length of the water droplet at the moment of falling (the volume of the raindrop can be determined by looking up a table or a function relationship), and then the rainfall in the target area is measured.

[0054] It is worth noting that the different rainfall conditions of the present invention represent the amount of rainfall within the target area, and the different raindrop states represent the speed, direction, acceleration, etc. of raindrops within the target area entering the detection device of the present invention. For the sake of distinction, the droplets that enter the detection device during precipitation are collectively referred to as raindrops, and the droplets formed by raindrops from the drip outlet 31 are collectively referred to as water droplets.

[0055] like Figure 2-5As shown, the outer cylinder 1 of the present invention is set with upper and lower openings, the laser module 5 is set just above the center of the guide plate 3 and aligned with the drip outlet 31, the laser module 5 includes a laser emitting component and a laser receiving component, the laser emitting component emits a laser signal, and the laser signal first passes through the upper surface of the water droplet. After the action of the upper surface of the water droplet, the laser signal will be reflected and transmitted, and the laser signal will be divided into two. The first part of the laser signal is reflected into the laser module 5 (received by the laser receiving component), and the second part of the laser signal enters the water droplet; after the second part of the laser signal reaches the lower surface of the water droplet, the second part of the laser signal will also be divided into two, into a third part of the laser signal and a fourth part of the laser signal, the third part of the laser signal is reflected into the laser module 5, and the fourth part of the laser signal is transmitted and enters the air from the water droplet.

[0056] Therefore, the laser module 5 only needs to analyze the first part of the laser signal and the third part of the laser signal reflected into the laser module 5 to measure the change in the length of the water droplet along the direction of gravity (dripping trajectory) in real time. Specifically, the time difference between the first part of the laser signal and the third part of the laser signal transmitted to the laser module 5 is obtained. According to the time difference divided by 2 and multiplied by the transmission speed of the laser signal, the length of the water droplet at the moment of falling can be obtained.

[0057] The present invention is based on the change of the water drop shape. By analyzing the reflected laser signal in different states through the laser module 5, the length of the water drop at the moment of falling can be known. The specific analysis is: Figure 1 As shown, within a short period of time after a water droplet falls, a water film can be considered to have formed at the drip outlet 31. There is an air gap between the water droplet and the water film at the drip outlet 31. The laser module 5 will receive the reflection signals from the upper and lower surfaces of the water film at the drip outlet 31, as well as the reflection signals from the upper and lower surfaces of the water droplet. When the water droplet does not fall (no water droplet is formed), the laser module 5 will only receive the reflection signals from the upper and lower surfaces of the water film at the drip outlet 31. By analyzing the changes in the number of reflection signals, the laser module 5 can obtain the corresponding moment of the water droplet falling, and then measure the corresponding length of the water droplet at this moment. The water drop counter 4 counts the formed water droplets, and measures the length of the water droplets in the order in which the water droplets fall. The length of the water droplets is converted into the calibrated volume of the water droplets in turn, thereby improving the accuracy of precipitation measurement in the target area.

[0058] The present invention utilizes the relationship between the length of a water droplet at the moment it falls and its volume to calibrate the volume of a water droplet in different states. The laser module 5 measures the length of raindrops collected by the droplet-sensing rainfall detection device at the moment they form a water droplet at the drip outlet 31, so as to calibrate the actual volume of the water droplet, thereby improving the accuracy of rainfall detection.

[0059] In order to illustrate the complete solution of the present invention, the details of the present invention are explained in detail below. In order to avoid as much as possible the splashing of raindrops into the detection device, which reduces the amount of rain collected and causes inaccurate measurement. Figure 6 As shown, it also includes a splash cone 6, the cone angle of the splash cone 6 is set upward at a second preset angle, the bottom of the splash cone 6 is provided with at least two mounting posts 61 in the vertical direction, and the guide plate 3 is provided with at least two first mounting holes 32, the mounting posts 61 match the first mounting holes 32, and the mounting posts 61 are inserted into the first mounting holes 32 so that the bottom of the splash cone 6 and the upper surface of the guide plate 3 are suspended at a preset height. The present invention provides the splash cone 6, and after raindrops fall into the detection device of the present invention, the cushioning effect of the cone surface of the splash cone 6 makes it possible for raindrops to be controlled to remain in the detection device of the present invention as much as possible even if they splash (the raindrops will splash onto the inner wall of the outer cylinder 1 of the present invention, so that they will not splash outside the present invention).

[0060] In order to allow raindrops to smoothly converge into the dripping port 31, the splash cone 6 of the present invention needs to be spaced a certain distance from the drainage plate 3. The present invention sets a first mounting post 61 at the bottom of the splash cone 6 and sets a first mounting hole 32 at a corresponding position on the drainage plate 3. The splash cone 6 is inserted into the first mounting hole 32 through the first mounting post 61 to form a suspended structure. The bottom diameter of the splash cone 6 of the present invention is smaller than the inner diameter of the outer cylinder 1, so that raindrops can smoothly enter the drainage plate 3. The drainage plate 3 is set downward at a first preset angle along the dripping port 31, so that raindrops can smoothly converge into the dripping port 31. When the raindrops in the dripping port 31 gather to a certain extent, they will form water droplets and drip from the drainage channel 211. The water drop counter 4 counts the water droplets and obtains the length of the water droplets dripping during the detection process to obtain the actual volume of the water droplets.

[0061] It's worth noting that before obtaining the actual volume of a water droplet, the present invention also requires simulating the relationship between the length of a water droplet at the moment of impact and its actual volume, creating a table or functional relationship. This table lookup allows the actual volume of the water droplet during the actual detection process to be determined. This is achieved by obtaining the actual length of a water droplet within the target area at the moment of impact, using the simulated table or functional relationship to determine the actual volume of the water droplet, thereby measuring the precipitation within the target area.

[0062] The preset height of the splash cone 6 of the present invention is set according to actual needs, and should not be too high or too low. The splash cone 6 is provided in the drop-sensing rain detection device provided by the present invention, which can reduce the loss of water droplets dripping into the present invention as much as possible and improve the accuracy of measurement. In addition, the principle of the present invention is to form water droplets in the detection device, and calculate the rainfall in the target area by the number of water droplets detected per unit time. Based on the detection principle of the present invention, the opening of the present invention can be designed to be very small (for example, the outer cylinder 1 is directly designed to be a few tens of centimeters in diameter). Compared with the existing rain gauge, the volume can be set to be small enough, which can better meet the requirements of miniaturization and integration.

[0063] To prevent the laser module 5 within the droplet-sensing rainfall detection device from short-circuiting and failing due to contact with raindrops, and the laser module 5 from shifting during detection, resulting in measurement failure or inaccuracy, the splash cone 6 of the embodiment of the present invention is hollow and includes a support frame 62 for securing the laser module 5.

[0064] The embodiment of the present invention fixes the laser module 5 inside the anti-splash cone 6, and utilizes the protective function of the anti-splash cone 6 to effectively avoid the problem of short circuit failure of the laser module 5 caused by the laser module 5 contacting raindrops. In addition, the present invention sets a support frame 62 inside the anti-splash cone 6. The support frame 62 is mainly used to fix the laser module 5, so that the laser module 5 can be stably aligned with the drip outlet 31, so that the trajectory of the laser signal emitted by the laser module 5 always coincides with the trajectory of the falling water droplets. Figure 7 As shown, a specific structural diagram of the support frame 62 of the present invention is shown. The support frame 62 of the present invention mainly plays a fixing role. It can be the structure shown in the figure, or it can be a hook structure (a mounting hole is set on the laser module 5, and the hook hangs the laser module 5). The laser module 5 can be directly welded to the inside of the splash cone 6 (the splash cone 6 is used as the support frame 62).

[0065] In order for the water drop counter 4 and the laser module 5 of the present invention to work smoothly, it is also necessary to provide electric energy to the water drop counter 4 and the laser module 5. Figure 8As shown, the present invention also includes a circuit board 7, which is disposed between the drainage plate 3 and the rain gauge support column 21. The circuit board 7 is electrically connected to the water drop counter 4 and the laser module 5. It is worth noting that when the water drop counter 4 counts water droplets, the water drop counter 4 needs to be perpendicular to the trajectory of the water droplets and intersect at a point in order to count the falling water droplets. Typically, the circuit board 7 is connected to the water drop counter 4 and the laser module 5 by a metal wire. In order to minimize contact between the circuit and the water droplets, an embodiment of the present invention provides a feasible solution, in which the center of a specific mounting column 61 disposed at the bottom of the splash cone 6 is hollowed out (set to a hollow structure), and the metal wire connecting the circuit board 7 to the water drop counter 4 and the laser module 5 is placed inside the mounting column 61. It is worth noting that in order to allow water droplets to drip smoothly into the drainage channel 211, after the water droplets are formed at the drip outlet 31 of the present invention, it should be ensured that there are no obstructions on the path of the water droplets dripping into the drainage channel 211. The center of the circuit board 7 of the present invention is hollow. Under normal circumstances, the aperture diameter at the center of the circuit board 7 should be greater than or equal to the diameter of the drainage channel 211.

[0066] The guide plate 3 described in the present invention is set at a first preset angle downward along the drip outlet 31. When the preset angle is too large, it is easy to cause raindrops to fail to form water droplets after gathering at the drip outlet 31 (water will flow out of the drip outlet 31 in the form of a stream). When the preset angle is too small, it is difficult for raindrops to gather at the drip outlet 31. Through experiments, it is found that when the first preset angle of the present invention is less than or equal to 15° and greater than or equal to 5°, the measurement accuracy requirements can be guaranteed.

[0067] The splash cone 6 of the present invention is primarily used to prevent raindrops from splashing out of the detection device. The angle of the splash cone 6 (the second preset angle) should not be too large or too small. The angle of the splash cone 6 of the present invention is set to be less than or equal to 95 degrees and greater than or equal to 70 degrees. Experiments have shown that when set between 70° and 95°, the detection accuracy requirement can be met (raindrops splash out of the detection device as little as possible).

[0068] In order to ensure that raindrops falling into the detection device of the present invention can smoothly form water droplets at the drip port 31 and can be detected by the water drop counter 4. The aperture of the drip port 31 of the present invention should not be too large or too small. When the aperture of the drip port 31 is too large, it is difficult for raindrops to form water droplets at the fixed position of the drip port 31 (the position where the water droplets are formed may change), or the raindrops will flow into the drainage channel 211 from the side wall of the drip port 31 in the form of a stream of water and cannot form water droplets; when the aperture of the drip port 31 is too small, it is difficult for raindrops to drip out of the drip port 31. When the rainfall is large enough, the raindrops will form a water column in the form of a jet and flow from the drip port 31 into the drainage channel 211, and cannot form water droplets, making it impossible for the detection device to measure. Through experimental tests, it can be seen that the drip port 31 of the present invention is cylindrical, and the diameter of the drip port 31 is greater than or equal to 3 mm and less than or equal to 6 mm. The specific diameter of the drip port 31 is determined according to the accuracy requirements.

[0069] In order to prevent the raindrops from flowing into the dripping port 31 through the guide plate 3, the amount of raindrops gathered in different directions along the dripping port 31 will not be inconsistent, resulting in uneven formation of water droplets, which in turn will cause large errors in measurement. Figure 9 As shown, the upper surface of the drain plate 3 of the present invention is provided with grooves 33. Rainwater flows evenly through these grooves 33 toward the edges of the drip outlet 31, so that raindrops form droplets on the lower surface of the drip outlet 31. Due to the provision of grooves 33, raindrops will first wet the drain plate 3 and then move along the grooves 33. For the side with a faster water flow, the blocking effect of the grooves 33 can slightly slow the time it takes for the water to reach the drip outlet 31 and the flow rate, thereby helping to form stable droplets and improving the measurement accuracy of the present invention.

[0070] Further, such as Figure 10 As shown, the present invention also includes a rain gauge bottom cover 8, the upper surface of which is provided with a mounting groove 81. The lower portion of the outer tube 1 is inserted into the mounting groove 81 to facilitate the fixing of the outer tube 1 to the rain gauge bottom cover 8. The rain gauge bottom cover 8 is provided with a protrusion 82, and a third mounting hole 821 is provided in the protrusion 82. The third mounting hole 821 is used to fix the rain gauge detection device. The present invention is fixed to the desired installation location through the third mounting hole 821 on the rain gauge bottom cover 8. Correspondingly, the present invention can be fixed to the desired installation location using pins, screws, or welding.

[0071] To further prevent raindrops from splashing through the detection device, e.g. Figure 2 As shown, the outer cylinder 1 of the present invention is provided with a cutting edge 11 at the top thereof, and the cutting edge 11 is provided to extend inwards at a third preset angle. It is worth noting that the third preset angle is usually set according to actual needs.

[0072] The present invention utilizes the relationship between the length of a water droplet at the moment it falls and its volume to calibrate the volume of a water droplet in different states. The laser module 5 measures the length of raindrops collected by the droplet-sensing rainfall detection device at the moment they form a water droplet at the drip outlet 31, so as to calibrate the actual volume of the water droplet, thereby improving the accuracy of rainfall detection.

[0073] Example 2:

[0074] Based on the use of the drip-sensing rainfall detection device of embodiment 1, the present invention also proposes a method for using the drip-sensing rainfall detection device, such as Figure 11 As shown, specifically including:

[0075] Step 201: According to a preset rainfall gradient, water droplets formed under different rainfall conditions are simulated in the drop-sensing rainfall detection device, and the length of the water droplet at the moment of falling and the corresponding volume of the water droplet are obtained.

[0076] In this embodiment, the relationship between the length of a water droplet at the moment of falling and its volume is obtained in advance and tabulated (a comparison table) or a functional relationship is obtained. When detecting rainfall in a target area, the laser module 5 detects the length of the water droplet at the moment of falling in real time, and the actual volume of the corresponding water droplet is obtained by comparison or functional relationship. It is worth noting that the actual volume of the water droplet obtained by the present invention also has a certain error, but compared with treating each droplet as a fixed volume value, the accuracy of the embodiment of the present invention is significantly improved, and the device for measuring the volume of the water droplet can be omitted during the real-time measurement process. Before performing real-time measurement, the present invention first needs to obtain the relationship between the length of the water droplet at the moment of falling and the actual volume of the water droplet. By measuring the length of the water droplet at the moment of falling in real time and looking up the table or using the functional relationship, the real-time measured water droplet volume is obtained, and then the precipitation in the target area is determined. It is worth noting that during the simulation process, the volume of the water droplet needs to be measured using a measuring tool; during the actual real-time detection process, it is not necessary to use a measuring tool to measure the volume of the water droplet; the volume of the water droplet can be obtained by comparison.

[0077] Step 202: Utilize the droplet-sensing rain detection device to detect the rainfall situation in the target area in real time, obtain the length of the water droplets formed in the droplet-sensing rain detection device at the moment of falling, and record them in the order of the time of falling.

[0078] The present invention primarily utilizes a laser module 5 to obtain the length of a water droplet at the moment of its impact. The laser module 5 comprises at least a transmitter submodule, a receiver submodule, and an analyzer submodule. The transmitter submodule is primarily used to transmit laser signals, the receiver submodule is primarily used to receive the transmitted laser signals, and the analyzer submodule is used to analyze the number of reflected laser signals, the time difference between two laser signal reflections within the water droplet, and the speed at which the laser signal propagates within the water droplet, thereby determining the length of the water droplet at the moment of its impact.

[0079] The following is a detailed explanation of this implementation process: after the raindrop breaks away from the drip outlet 31 to form a water droplet, the number of laser signals received by the receiving submodule of the laser module 5 will increase by two (this has been explained before and will not be repeated here). The critical moment when the water droplet falls is obtained by the change in the number of laser signals; the length of the water droplet at the moment of falling is calculated by the time difference between the two reflected laser signals in the water droplet and the speed of the laser signal propagation in the water droplet.

[0080] Step 203: By comparing the length of the water droplets formed in the target area at the moment of falling with the length of the water droplets formed under different rainfall conditions simulated in the drop-sensing rain detection device, the volume of the water droplets formed in the target area in the drop-sensing rain detection device is obtained, and the rainfall in the target area is calculated.

[0081] After obtaining the length of a water droplet at the moment of falling, the actual volume of the water droplet is obtained by looking up a table or function relationship. The present invention pre-determines the relationship between the length of a water droplet at the moment of falling and the volume of the water droplet, thereby obtaining the actual volume of the water droplet under different rainfall amounts. The laser module 5 measures the length of raindrops collected in real time by the droplet-sensing rainfall detection device at the moment of falling, forming a water droplet at the drip outlet 31, to obtain the actual volume of the water droplet during the real-time detection process, thereby improving the accuracy of rainfall detection.

[0082] In order to reduce the measurement error as much as possible, the average value is usually used to measure the rainfall in the target area. Whether the present invention is pre-simulating the relationship between the length of water droplets with different rainfall amounts at the moment of falling and the actual volume of the water droplets, or obtaining the length of water droplets at the moment of falling in real time within the target area through the drop-sensing rain detection device of the present invention, the average value is used for calculation. Next, this is explained by taking the pre-simulation of the relationship between the length of water droplets with different rainfall amounts at the moment of falling and the volume of the water droplets as an example. The embodiment of the present invention obtains the length of the water droplets at the moment of falling and the corresponding volume of the water droplets by taking the average value, such as Figure 12 As shown, specifically including:

[0083] Step 301: Set a preset number of water drops, use the water drop counter 4 to detect the falling process of water drops, and after the time intervals between the falling of adjacent water drops are equal, use the laser module 5 to detect the length of the water drops at the moment of falling.

[0084] Among them, the drop-sensing rain detection device of the embodiment of the present invention needs to be moistened first, and then simulate the relationship between the length of the water droplet at the moment of falling and the volume of the water droplet. In the process of real-time detection of the length of the water droplet at the moment of falling in the target area, it is necessary to ensure that the water droplets are stably generated before starting.

[0085] Step 302: Calculate the average length of the water droplets at the moment of falling by taking the average value, and measure the corresponding average volume of the water droplets using a measuring instrument.

[0086] Among them, in the specific detection process, due to different rainfall conditions, the number of water droplets dripping per unit time is different (the greater the rainfall per unit time, the greater the rainfall collected per unit time by the drop-sensing rain detection device of the present invention, and the more water droplets generated per unit time). The embodiment of the present invention selects a preset number of water droplets, obtains the length of each water droplet at the moment of dripping, obtains the average length of the water droplet at the moment of dripping by the average value, and measures the average volume of the water droplet by the measuring device. And make a comparison table or obtain the functional relationship between the length and volume of the water droplet at the moment of dripping, so as to prepare for subsequent real-time detection to obtain the volume of each water droplet, and then calculate the precipitation per unit time in the target area. It is worth noting that in the actual measurement process, a certain number of drop-sensing rain detection devices are usually evenly arranged in the area, and the data collected by the drop-sensing rain detection device is converted into precipitation in the target area.

[0087] The above description is only a preferred embodiment of the present invention. The present invention cannot list all specific embodiments one by one. Therefore, the aforementioned specific embodiments are not specific limitations of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for using a drop-sensing rainfall detection device, characterized in that: include: According to the preset rainfall gradient, the droplet-sensing rain detection device simulates the water droplets formed under different rainfall conditions, and obtains the length of the water droplet at the moment of falling and the corresponding volume of the water droplet; Using the droplet-sensing rain detection device to detect the rainfall in the target area in real time, obtaining the length of the water droplets formed in the droplet-sensing rain detection device at the moment of falling, and recording them in the order of the time of falling; By comparing the length of the water droplets formed in the target area at the moment of falling with the length of the water droplets formed under different rainfall conditions simulated in the drop-sensing rain detection device, the volume of the water droplets formed in the drop-sensing rain detection device in the target area is obtained, and the rainfall in the target area is calculated.

2. The method for using the drop-sensing rainfall detection device according to claim 1, characterized in that: The droplet-sensing rainfall detection device comprises a water drop counter (4) and a laser module (5); The method further comprises: A preset number of water drops is set, and a water drop counter (4) is used to detect the falling process of the water drops. After the time intervals between the falling of adjacent water drops are equal, a laser module (5) is used to detect the length of the water drops at the moment of falling; By taking the average value, the average length of the water drop at the moment of falling is calculated, and the corresponding average volume of the water drop is measured using a measuring instrument.

3. The method for using the drop-sensing rainfall detection device according to claim 1, characterized in that: The droplet-sensing rainfall detection device comprises a laser module (5); The step of obtaining the length of a water drop formed in the drop-sensing rain detection device at the moment of falling comprises: By analyzing the number of reflected laser signals, the time difference between the two reflected laser signals in the water droplet, and the speed of the laser signal propagation in the water droplet, the length of the water droplet at the moment of falling is obtained.

4. The method for using the drop-sensing rainfall detection device according to claim 1, wherein: The method further comprises: After obtaining the length of the water drop at the moment of falling, the actual volume of the water drop is obtained by looking up a table or function relationship.

5. The method for using the drop-sensing rainfall detection device according to claim 1, characterized in that: The method further comprises: The drop-sensing rainfall detection device first needs to be wetted, and then simulated to obtain the relationship between the length of the water drop at the moment of falling and the volume of the water drop.

6. The method for using the drop-sensing rainfall detection device according to claim 1, wherein: The method further comprises: The rainfall in the target area is measured using an average value.

7. The method for using the drop-sensing rainfall detection device according to claim 1, wherein: The laser module (5) comprises a laser emitting component and a laser receiving component; The step of obtaining the length of a water drop formed in the drop-sensing rain detection device at the moment of falling comprises: The laser emitting component emits a laser signal, which first passes through the upper surface of the water droplet. After being acted upon by the upper surface of the water droplet, the laser signal is reflected and transmitted, and the laser signal is divided into two parts. The first part of the laser signal is received by the laser receiving component, and the second part of the laser signal enters the water droplet. After the second part of the laser signal reaches the lower surface of the water droplet, the second part of the laser signal is also divided into two parts, namely, a third part of the laser signal and a fourth part of the laser signal. The third part of the laser signal is reflected into the laser module (5), and the time difference between the first part of the laser signal and the third part of the laser signal transmitted to the laser module (5) is obtained. The length of the water droplet at the moment of falling is obtained by dividing the time difference by 2 and multiplying it by the transmission speed of the laser signal.

8. The method for using the drop-sensing rainfall detection device according to claim 7, characterized in that: The drop-sensing rain detection device further comprises an outer cylinder (1), a rain gauge base (2), a drainage plate (3) and a water drop counter (4); The outer cylinder (1) is provided with upper and lower openings, a guide plate (3) is provided in the middle portion of the inner portion of the outer cylinder (1), a dripping port (31) is provided at the center of the guide plate (3), and the guide plate (3) is provided downwardly along the dripping port (31) at a first preset angle; The rain gauge base (2) is arranged below the drainage plate (3), and the rain gauge base (2) comprises a rain gauge support column (21) and a rain gauge base plate (22). The lower end of the rain gauge support column (21) is arranged at the center of the rain gauge base plate (22), and a first through hole (221) is provided at the center of the rain gauge base plate (22). A vertical axial drainage channel (211) is provided in the rain gauge support column (21), and the diameter of the drainage channel (211) is larger than the diameter of the dripping port (31). The drainage channel (211), the dripping port (31) and the first through hole (221) are arranged on the same vertical axis to form a channel for counting water drops. The side wall of the rain gauge support column (21) is provided with a second mounting hole (212), and the water drop counter (4) is arranged in the second mounting hole (212), perpendicular to the trajectory of the falling water droplets and intersecting at one point, so as to facilitate counting of the falling water droplets; The laser module (5) is arranged directly above the center of the guide plate (3) and is aligned with the water dripping port (31).

9. The method for using the drop-sensing rainfall detection device according to claim 8, characterized in that: The drop-sensing rainfall detection device further comprises a splash cone (6), the cone angle of the splash cone (6) being arranged upward at a second preset angle, the bottom of the splash cone (6) being provided with at least two mounting posts (61) in a vertical direction, the guide plate (3) being provided with at least two first mounting holes (32), the mounting posts (61) matching the first mounting holes (32), and the mounting posts (61) being inserted into the first mounting holes (32) so that the bottom of the splash cone (6) and the upper surface of the guide plate (3) are suspended at a preset height.

10. The method for using the drop-sensing rainfall detection device according to claim 8, characterized in that: The upper surface of the guide plate (3) is provided with lines (33), and rainwater flows evenly toward the edges of the drip outlet (31) through the lines (33), so that raindrops form water droplets on the lower surface of the drip outlet (31).

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