CN115373051A - Dripping-feeling rainfall detection device and use method thereof - Google Patents

Abstract

The invention discloses a drop-sensing rain detection device and a method for using the device. The device includes an outer cylinder, a rain base, a drainage plate, a water drop counter and a laser module; The diversion plate is set downward at a first preset angle; the rainfall base includes a rain support column and a rain base plate, the lower end of the rain support column is arranged at the center of the rain base plate, and a first through hole is arranged at the center of the rain gauge base plate. A drainage channel is provided, and the drainage channel, the drip outlet and the through hole are arranged on the same axis; the side wall of the rain support column is provided with a second installation hole, and the water drop counter is arranged in the second installation hole, which is perpendicular to the falling track of rainwater and intersects with the One point, in order to count the water droplets; the laser module is aligned with the drip opening, and the laser module is used to detect the length of the moment when the water droplets fall. The invention uses a laser module to measure the instantaneous length of the water drop, calibrates the volume of the water drop, and improves the measurement accuracy.

Description

A drop-sensing rain detection device and its application method

technical field

The invention relates to the technical field of rainfall detection, in particular to a drop-sensing rainfall detection device and a method for using the same.

Background technique

Rainfall detection can record rainfall data in real time. Through the obtained rainfall data, the precipitation in different regions can be detected, which has a certain guiding effect on agricultural irrigation. The amount of precipitation will greatly affect various fields such as human production and life. If there is too much precipitation, there will be natural disasters such as floods, landslides, mudslides, etc., and it will cause great economic losses and inconvenience to human production and life; Contradictions; cause land salinization or land desertification and so on. The significance of installing the rainfall detection system is to integrate the data of past precipitation in time and make adjustments to reduce the harm caused by rainfall.

In order to make the precipitation more accurate and comparable, the meteorological observation standard stipulates that: the precipitation refers to the liquid or solid (after melting) precipitation falling from the sky to the ground, without evaporation, infiltration, loss Depth of accumulation in the horizontal plane. Precipitation is measured in millimeters. The traditional instruments for measuring precipitation can be mainly divided into tipping bucket rain gauge, weighing rain gauge and piezoelectric rain gauge according to the principle. Traditional instruments for measuring precipitation are bulky and have low detection accuracy, and it is difficult to integrate electronic devices for rainfall detection with other devices.

In view of this, it is an urgent problem to be solved in this technical field to overcome the defects in the prior art.

Contents of the invention

The purpose of the present invention is how to overcome the problems that the existing rain gauge for measuring rainfall has large volume, low measurement accuracy and difficulty in integrating with other devices.

The present invention is achieved like this:

In the first aspect, the present invention provides a drop-sensing rain detection device, which includes an outer cylinder, a rain base, a drainage plate, a water drop counter, and a laser module;

The outer cylinder is arranged with upper and lower openings, and a drainage plate is arranged in the middle part of the interior of the outer cylinder, and a drip opening is arranged at the center of the drainage plate, and the drainage plate forms a first preset angle downward along the drip opening set up;

The rain gauge base is arranged under the diversion plate, the rain gauge base includes a rain gauge support column and a rain gauge bottom plate, the lower end of the rain gauge support column is set at the center of the rain gauge bottom plate, and a first channel is arranged at the center of the rain gauge bottom plate A vertical axial drainage channel is arranged in the rain support column, the diameter of the drainage channel is larger than the diameter of the drip opening, and the drainage channel, the drip opening and the first through hole are arranged on the same vertical axis On, forming a channel for counting water droplets;

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

The laser module is arranged directly above the center of the drainage plate, and is aligned with the drip port. The laser module emits a laser signal to detect the length of the moment when the water drop is formed by the drip port, and the length of the moment of the drop is compared with the The relationship between the volume of water droplets to obtain the volume of water droplets.

Preferably, it also includes an anti-splash cone, the cone angle of the anti-splash cone is set upwards at a second preset angle, at least two mounting columns are arranged on the bottom of the anti-splash cone along the vertical direction, and on the drain plate At least two first installation holes are provided, the installation posts are matched with the first installation holes, and the installation posts are inserted into the first installation holes so that the bottom of the anti-splash cone and the upper surface of the diversion plate form a Preset height suspension settings.

Preferably, the inside of the splash-proof cone is hollow, and a support frame is arranged inside the splash-proof cone, and the support frame is used to fix the laser module.

Preferably, a circuit board is also included, the circuit board is arranged between the drainage plate and the rain support column, and the circuit board is electrically connected to the water drop counter and the laser module.

Preferably, the upper surface of the drainage plate is provided with lines, through which the rainwater evenly flows to the edge of the drip opening, so that the raindrops form water droplets on the lower surface of the drip opening.

Preferably, it also includes a rain gauge bottom cover, the upper surface of the rain gauge bottom cover is provided with an installation groove, the lower part of the outer cylinder is inserted into the installation groove, the rain gauge bottom cover is provided with a protruding part, and the protruding part is set There is a third mounting hole, and the third mounting hole is used for fixing the rain detection device.

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°.

Preferably, the drip opening is cylindrical, and the diameter of the drip opening is greater than or equal to 3 mm and less than or equal to 6 mm.

In the second aspect, the present invention also proposes a method for using the drop-sense rain detection device based on the drop-sense rain detection device, including:

According to the preset rainfall gradient, the water droplets formed under different rainfall conditions are simulated in the drip sensing rainfall detection device, and the length of the water drop at the moment of dripping and the corresponding volume of the water drop are obtained;

Utilize the drop-sensitive rainfall detection device to detect the rainfall in the target area in real time, obtain the length of the moment when the water droplets formed in the drop-sensitive rain detection device drop, and record according to the time sequence of the drop;

By comparing the length of the moment of drop of the water drop formed in the target area with the length of the moment of drop of the drop of water formed under different rainfall conditions simulated in the drop feeling rain detection device, the drop feeling in the target area can be obtained. The volume of water droplets formed in the rainfall detection device and calculates the rainfall in the target area.

Preferably, the length of the moment when the water droplet falls and the corresponding volume of the water droplet are obtained by taking an average value, specifically including:

Set the preset number of water droplets, and use the water drop counter to detect the falling process of water droplets. After the falling time interval between adjacent water droplets is equal, use the laser module to detect the length of the moment when the water droplets fall;

By taking the average value, the average length of the moment when the water drop falls is calculated, and the corresponding average volume of the water drop is measured by a measuring instrument.

In the present invention, a laser module is set to measure the length of the raindrops collected by the drop-sensing rainfall detection device at the drip opening to calibrate the volume of the water droplets, thereby improving the accuracy of rainfall detection.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram of the shape of a water drop at the moment of dripping at the drip opening provided by the embodiment of the present invention;

Fig. 2 is a schematic diagram of the overall structure of a drop-sensitive rain detection device provided by an embodiment of the present invention;

Fig. 3 is a schematic cross-sectional structure diagram of a drip sensing rain detection device provided by an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a rain base of a drip sensing rain detection device provided by an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a rain base plate of a drip sensing rain detection device provided by an embodiment of the present invention;

Fig. 6 is a schematic structural diagram of the anti-splash cone of a drop-sensitive rain detection device provided by an embodiment of the present invention;

Fig. 7 is a specific structural schematic diagram of a support frame of a drip sensing rain detection device provided by an embodiment of the present invention;

Fig. 8 is a schematic diagram of the position structure of a circuit board of a drop-sensing rain detection device provided by an embodiment of the present invention;

Fig. 9 is a top view of a drainage plate of a drip sensing rain detection device provided by an embodiment of the present invention;

Fig. 10 is a schematic diagram of the structure of a rain bottom cover of a drip sensing rain detection device provided by an embodiment of the present invention;

Fig. 11 is a flow chart of a method of using a drop-sensing rain detection method provided by an embodiment of the present invention;

Fig. 12 is a flow chart of a method for using a drop-sensing rain detection device provided by an embodiment of the present invention;

Wherein, reference sign is:

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

Detailed ways

In the description of the present invention, the orientation or positional relationship indicated by the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom" etc. are based on the drawings The orientations or positional relationships shown are only for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention.

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1:

An embodiment of the present invention provides a drop-sensing rain detection device, including an outer cylinder 1, a rain base 2, a drainage plate 3, a water drop counter 4 and a laser module 5;

The outer cylinder 1 is arranged with upper and lower openings, and the middle part of the outer cylinder 1 is provided with a drainage plate 3, and the center of the drainage plate 3 is provided with a drip opening 31, and the drainage plate 3 is arranged along the direction of the drip opening 31. The bottom is the first preset angle setting;

The rain gauge base 2 is arranged below the diversion plate 3, the rain gauge base 2 includes 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 the rain gauge base plate 22 A first through hole 221 is provided at the center of the rainfall support column 21, and a vertical axial drainage channel 211 is arranged in the rain gauge support column 21. The diameter of the drainage channel 211 is larger than the diameter of the drip opening 31, and the drainage channel 211 , the drip opening 31 and the first through hole 221 are arranged on the same vertical axis to form a channel for counting water droplets;

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

The laser module 5 is arranged directly above the center of the drainage plate 3, and is aligned with the drip port 31. The laser module 5 emits a laser signal for detecting the length of the moment when the water drop is formed by the drip port 31, and passes through the water drop. The relationship between the length of the drop moment and the volume of the water droplet is used to obtain the volume of the water droplet.

As shown in Figure 1, it shows a schematic diagram of the shape of the water drop at the moment of dripping at the drip opening. In order to see the shape of the water drop more clearly, the water film layer formed at the drip opening is not drawn. The raindrops form water droplets at the drip opening 31 and break away from the drip opening 31 to drip into the drainage channel 211 . During this process, based on the internal tension of the water droplets, the shape of the water droplets will undergo a series of changes. First, after the raindrops converge to form water droplets, the length of the vertical direction (gravity direction) of the water droplets will become longer. When the maximum value (corresponding to the water droplet At the moment of dripping), the water drop will break away from the drip opening 31, and then be affected by the internal tension of the water drop, and the water drop will rebound. Theoretically, the moment when the water drop falls corresponds to the moment when the vertical length of the water drop is maximum, and the volume of the water drop corresponds to the length of the drop at the moment of falling.

In practical application scenarios, different rainfall conditions and different raindrop states will affect the volume of water droplets when they fall, which will cause the length of the moment of water droplets to change. Therefore, it cannot be considered that the volume of each droplet during the process of water droplets falling They are all unchanged. At present, the rainfall is calculated by multiplying the number of raindrops by the fixed volume. From the above analysis, it can be seen that under different conditions, the volume of water droplets is different, and the method of calculating rainfall with a fixed volume has the problem of inaccurate detection. .

In order to solve the foregoing problems, in this embodiment, when the rain detection device for the target area is used to detect the amount of rain in the target area, the length of the moment when the water drop drops is measured by the laser module 5 arranged in the detection device, and through the water drop The relationship between the volume and the length of the water drop at the moment of falling (the volume of the rain drop can be determined by looking up the table or the functional relationship), obtain the real volume of the water drop, and then measure the rainfall in the target area.

It is worth noting that different rainfall conditions in the present invention indicate the amount of rainfall in the target area, and different raindrop states indicate the speed, direction, acceleration, etc. of the raindrops in the target area entering the detection device of the present invention. In order to show the difference, the liquid droplets entering the detection device during the precipitation process are collectively referred to as raindrops, and the liquid droplets formed from the raindrops from the drip opening 31 are collectively referred to as water droplets.

As shown in Figures 2-5, the outer cylinder 1 of the present invention is provided with upper and lower openings, and the laser module 5 is arranged directly above the center of the drainage plate 3 and aligned with the drip port 31. The laser module 5 includes a laser emitting component and a laser The receiving component, the laser emitting component emits a laser signal, the laser signal first passes through the upper surface of the water droplet, and after passing through the action of the upper surface of the water droplet, the laser signal will be reflected and transmitted, the laser signal is divided into two, and the first part of the laser signal is reflected to the In the laser module 5 (received by the laser receiving component), 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 and divided into the third part The laser signal and the fourth part of the laser signal, the third part of the laser signal is reflected into the laser module 5, the fourth part of the laser signal is transmitted, and enters the air from the water droplet.

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 in the laser module 5, and can measure the length change of the water drop along the direction of gravity (dropping track) in real time. The time difference between a part of the laser signal and the second part of the laser signal transmitted to the laser module 5 can be divided by 2 and multiplied by the transmission speed of the laser signal to obtain the momentary length of the water drop.

The present invention is based on the change of the shape of the water droplet. By analyzing the reflected laser signals in different states through the laser module 5, the length of the moment when the water droplet falls can be known. Inside, it can be considered that a layer of water film is formed at the drip opening 31 at this time, and there is an air gap between the water droplet and the water film at the drip opening 31, and the reflection from the upper and lower surfaces of the water film at the drip opening 31 will be received by the laser module 5 signal, and the reflection signal on the upper and lower surfaces of the water droplet; when the water droplet did not drop (not forming a water droplet), the laser module 5 would only receive the reflection signal on the upper and lower surfaces of the water droplet 31 water film, and the laser module 5 would pass the analysis The change in the number of reflected signals can obtain the moment corresponding to the moment when the water drop drops, and then measure the length corresponding to the water drop at this moment. The formed water droplets are counted by the water drop counter 4, and the length of the water droplets is measured sequentially according to the order in which the water droplets fall, and converted into the calibrated volume of the water droplets in turn, so as to improve the accuracy of precipitation measurement in the target area.

The present invention uses the relationship between the length of the water drop and the volume of the water drop to correct the volume of the water drop in different states, and the raindrops collected by the drop sensing rain detection device through the laser module 5 form the water drop at the drip port 31. The length of the water drop is measured to calibrate the true volume of the water droplet, thereby improving the accuracy of rainfall detection.

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 splashing of raindrops into the detection device as much as possible, the amount of collected rain is reduced, thereby causing the problem of inaccurate measurement. As shown in Figure 6, it also includes an anti-splash cone 6, the cone angle of the anti-splash cone 6 is set upwards at a second preset angle, and the bottom of the anti-splash cone 6 is provided with at least two mounting posts along the vertical direction 61, at least two first installation holes 32 are provided on the flow guide plate 3, the installation column 61 is matched with the first installation hole 32, and the installation column 61 is inserted into the first installation hole 32, The bottom of the anti-splash cone 6 and the upper surface of the deflector 3 are suspended at a preset height. The present invention is by arranging the anti-splash cone 6, after the raindrop drips into the detection device of the present invention, through the buffering effect of the anti-splash cone 6 conical surfaces, even if the raindrop splashes, it can control the raindrop to remain in the detection device of the present invention as much as possible ( Raindrop can splash on the outer cylinder 1 inner wall of the present invention, so that can not splash outside the present invention).

In order to make the raindrops converge to the drip opening 31 smoothly, there needs to be a certain distance between the anti-splash cone 6 of the present invention and the drain plate 3. The present invention sets the first mounting column 61 at the bottom of the anti-splash cone 6, and A first installation hole 32 is provided at a corresponding position on the flow guide plate 3 , and the anti-splash cone 6 is inserted into the first installation hole 32 through the first installation column 61 to form a suspended structure. The diameter of the bottom surface of the anti-splash cone 6 of the present invention is smaller than the inner diameter of the outer cylinder 1, so that the raindrops can smoothly enter the drainage plate 3, and the drainage plate 3 is arranged at a first preset angle downward along the drip opening 31, so that the raindrops can smoothly converge into the drip port 31, when the raindrops in the drip port 31 gather to a certain extent, water droplets will be formed and drip from the drainage channel 211, and the water droplets will be counted by the water drop counter 4, and the length of the water drop during the detection process will be obtained. Get the actual volume of the water droplet.

It is worth noting that before obtaining the actual volume of the water drop, the present invention also needs to simulate the relationship between the length of the water drop at the moment of falling and the actual volume of the water drop, and make a table or a functional relationship, and obtain the actual volume by looking up the table. Detects the actual volume of the process water droplets. The specific implementation method is as follows: obtain the actual length of the detected water droplet drop in the target area, obtain the real volume of the water droplet through the simulated table or function relationship, and then measure the precipitation in the target area.

The preset height of the anti-splash cone 6 of the present invention is set according to actual needs, and should not be too high or too low. The anti-splash cone 6 is arranged in the drop-sensitive rain detection device provided by the present invention, which can reduce the loss of water droplets falling 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 very small (for example, the diameter of the outer cylinder 1 is directly designed to be tens of centimeters), and compared with the existing rain gauge, the volume can be set to be small enough, more It can meet the requirements of miniaturization and integration.

In order to avoid the problem that the laser module 5 arranged in the drip sensing rain detection device contacts the raindrops, causing the short circuit failure of the laser module 5; and the deviation of the laser module 5 during the detection process, resulting in measurement failure or inaccuracy. The interior of the anti-splash cone 6 in the embodiment of the present invention is hollow, and the interior of the anti-splash cone 6 is provided with a support frame 62 , and the support frame 62 is used to fix the laser module 5 .

In the embodiment of the present invention, by fixing the laser module 5 inside the anti-splash cone 6, the protection effect of the anti-splash cone 6 can effectively avoid the short-circuit failure of the laser module 5 caused by the contact of the laser module 5 with raindrops. In addition, the present invention arranges the support frame 62 inside the anti-splash cone 6, and 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 port 31, so that the laser module 5 emits The trajectory of the signal and the trajectory of the water droplet always coincide. As shown in Figure 7, represent a kind of specific structural schematic diagram of support frame 62 of the present invention, support frame 62 of the present invention mainly plays the effect of fixing, can be the structure in the figure, also can be hook structure (on the laser module 5 Mounting holes are provided, the hooks hang the laser module 5), and the laser module 5 can be directly welded on the inside of the anti-splash cone 6 (the anti-splash cone 6 is used as the support frame 62).

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 . As shown in Figure 8, the present invention also includes a circuit board 7, which is arranged between the drainage plate 3 and the rain support column 21, and the circuit board 7 is electrically connected to the water drop counter 4 and the laser module 5 . It should be noted that when the water drop counter 4 counts the water droplets, the water drop counter 4 needs to be perpendicular to and intersect with the falling track of the water drop at one point, so as to realize the counting of the falling water droplets. Usually, the circuit board 7 is connected to the water drop counter 4 and the laser module 5 through a wire. The center of a specific mounting column 61 at the bottom of the splash cone 6 is hollowed out (set to a hollow structure), and the wire connected between the circuit board 7 and the drop counter 4 and the laser module 5 is put into the mounting column 61. It is worth noting that, in order to allow the water droplets to drip smoothly in the drainage channel 211, after the water droplets are formed at the drip port 31 of the present invention, the path of the water droplets falling to the drainage channel 211 should ensure that there is no obstruction. The circuit board of the present invention The center of the circuit board 7 is hollow. Normally, the diameter of the hole at the center of the circuit board 7 should be greater than or equal to the diameter of the drainage channel 211 .

The drainage plate 3 of the present invention is arranged at a first preset angle downward along the drip opening 31. When the preset angle is too large, it is easy to cause raindrops to gather at the drip opening 31 and fail to form water droplets (water will flow from drip outlet 31), when the preset angle is too small, it is difficult for the raindrops to gather at the drip outlet 31. It is known from experiments that the first preset angle of the present invention is less than or equal to 15° and greater than or equal to 5° , to ensure the measurement accuracy requirements.

The anti-splash cone 6 of the present invention is mainly used to prevent raindrops from splashing out of the detection device. The angle (the second preset angle) of the anti-splash cone 6 should not be too large or too small. The angle of the anti-splash cone 6 of the present invention is set at less than or equal to 95°, and greater than or equal to 70°. It can be known from experiments that when the setting is between 70° and 95°, the requirement of detection accuracy can be met (raindrops splash out of the detection device as little as possible).

In order to make the raindrops falling into the detection device of the present invention smoothly form water droplets at the water drip opening 31 and be detected by the water drop counter 4 . The aperture of the drip opening 31 of the present invention should not be too large, nor should it be too small. When the aperture of the drip opening 31 is too large, it is difficult for the raindrops to form water droplets at the fixed position of the drip opening 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 opening 31 in the form of water flow. When the aperture of the drip opening 31 is too small, it is difficult for raindrops to drip out from the drip opening 31. When the rainfall is large enough, the raindrops will form a water column in the form of jets, and flow into the drainage channel 211 from the drip opening 31. Inside, water droplets cannot form, making it impossible for the detection device to measure. Experimental tests show that the drip opening 31 of the present invention is cylindrical, and the diameter of the drip opening 31 is greater than or equal to 3 mm and less than or equal to 6 mm. The specific diameter of the drip opening 31 is determined according to the accuracy requirement.

In order to make the raindrops flow into the drip opening 31 through the drainage plate 3, the raindrops will not converge in different directions along the drip opening 31, so that the formed water droplets will not be uniform, resulting in large errors in measurement. As shown in Figure 9, the upper surface of the drainage plate 3 of the present invention is provided with lines 33, and the rainwater flows uniformly to the edge of the drip opening 31 through the lines 33, so that the raindrops form water droplets at the lower surface of the drip opening 31. . Through the arrangement of the lines 33, the raindrops will first wet the drainage plate 3 and move along the lines 33. For the side with a faster water flow, the blocking effect of the lines 33 can be used to slightly slow down the arrival at the drip outlet 31. The time and the flow velocity help to form stable water droplets and improve the accuracy of the measurement of the present invention.

Further, as shown in FIG. 10 , the present invention also includes a rain gauge bottom cover 8, the upper surface of the rain gauge bottom cover 8 is provided with a mounting groove 81, and the lower part of the outer cylinder 1 is inserted into the mounting groove 81, so as to facilitate the The outer cylinder 1 is fixed to the bottom rain cover 8 . The rain gauge bottom cover 8 is provided with a protruding portion 82, and a third mounting hole 821 is disposed in the protruding portion 82, and the third mounting hole 821 is used for fixing the rainfall detection device. The present invention is fixed on the position to be installed through the third installation hole 821 on the rain gauge bottom cover 8 . In a correspondingly achievable manner, the present invention can be fixed on the position to be installed by means of bolts, screws or welding.

In order to further prevent raindrops from splashing through the detection device, as shown in FIG. 2 , a cutting edge 11 is provided on the top of the outer cylinder 1 of the present invention, and the cutting edge 11 extends inward at a third preset angle. It should be noted that the third preset angle is usually set according to actual needs.

The present invention uses the relationship between the length of the water drop and the volume of the water drop to correct the volume of the water drop in different states, and the raindrops collected by the drop sensing rain detection device through the laser module 5 form the water drop at the drip port 31. The length of the water drop is measured to calibrate the true volume of the water droplet, thereby improving the accuracy of rainfall detection.

Example 2:

The present invention also proposes a method for using the drop-sensing rainfall detection device on the basis of the use of the drip-sensing rainfall detection device in Embodiment 1, as shown in FIG. 11 , specifically including:

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

Wherein, the embodiment of the present invention pre-acquires the relationship between the length of the moment when the water drop falls and the volume of the water drop, and makes a table (comparison table) or obtains the functional relationship. When detecting the amount of rainfall in the target area, the laser module 5 is used to detect the length of the moment when the water drop falls in real time, and the real volume of the corresponding water drop is obtained through comparison or functional relationship. It is worth noting that the actual volume of the water droplets obtained through the present invention also has certain errors, but compared with using each water droplet generated as a fixed volume value, the accuracy of the embodiment of the present invention will be significantly improved, and , in the process of real-time measurement, the device for measuring the volume of water droplets can be omitted. Before real-time measurement, the present invention firstly needs to obtain the relationship between the length of the water drop at the moment of falling and the real volume of the water drop, and obtain the real-time measured water drop volume by measuring the length of the water drop at the moment of falling in real time, and looking up the table or using the function relationship , and then determine the precipitation in the target area. It is worth noting that in the process of simulation, the volume of water droplets needs to be measured with measuring tools; in the process of actual real-time detection, it is not necessary to use measuring tools to measure the volume of water droplets, only through comparison The volume of the water droplet.

Step 202: Use the drop-sensitive rainfall detection device to detect the rainfall in the target area in real time, obtain the length of the moment when the water droplets formed in the drop-sensitive rain detection device fall, and record them according to the time sequence of the drop.

Wherein, the present invention mainly uses the laser module 5 to obtain the length of the moment when the water drop falls. The laser module 5 at least includes a transmitting sub-module, a receiving sub-module and an analyzing sub-module; wherein, the transmitting sub-module is mainly used for transmitting laser signals, the receiving sub-module is mainly used for receiving emitted laser signals, and the analyzing module is used for analyzing reflected laser signals. The number of laser signals, the time difference between the two reflected laser signals in the water droplet, and the propagation speed of the laser signal in the water droplet are used to obtain the length of the moment when the water droplet falls.

The implementation process will be explained in detail below: after the raindrops leave the drip opening 31 to form water droplets, the number of laser signals received by the receiving sub-module of the laser module 5 will increase by two (it has been explained above, so I won’t go into details here), The critical moment of the moment of water drop is obtained by the change of the number of laser signals; the length of the moment of water drop is calculated by the time difference of the laser signal reflected twice in the water drop and the speed of the laser signal propagating in the water drop.

Step 203: By comparing the length of the moment of drop of water droplets formed in the target area with the length of the moment of drop of water droplets formed under different rainfall conditions simulated in the drop-sensing rainfall detection device, obtain the length of the moment of drop of water droplets in the target area. The volume of water droplets formed in the drip sensing rain detection device is calculated, and the rainfall in the target area is calculated.

Wherein, after obtaining the length of the water drop at the moment of falling, the real volume of the water drop is obtained by looking up a table or a functional relationship. The present invention pre-acquires the relationship between the length of the water drop and the volume of the water drop in advance, and obtains the real volume of the water drop under different rainfall, and the raindrops collected in real time by the laser module 5 paired with the rain detection device for drop sensing form water droplets at the drip port 31 The length of the falling instant is measured to obtain the real volume of the water droplets in the real-time detection process, thereby improving the accuracy of rainfall detection.

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. In the present invention, no matter in pre-simulation to obtain the relationship between the length of the drop at the moment of different rainfall and the real volume of the water drop, or in the target area, the length of the drop at the moment of the drop is obtained in real time through the rain detection device of the present invention. calculated as an average value. Next, take the pre-simulation to obtain the relationship between the length of the droplet moment of different rainfall and the volume of the droplet as an example to illustrate this. In the embodiment of the present invention, the length of the water drop at the moment of dripping and the volume corresponding to the water drop are obtained by taking the average value, as shown in FIG. 12 , specifically including:

Step 301: Set the preset number of water droplets, use the water drop counter 4 to detect the falling process of the water droplets, and use the laser module 5 to detect the length of the moment when the water droplets fall after the falling time intervals between adjacent water droplets are equal.

Among them, the drop-sensing rain detection device of the embodiment of the present invention first needs to be wetted, and then simulate the relationship between the length of the drop and the volume of the drop, and detect the length of the drop in the target area in real time. It is necessary to ensure that the water droplets are stably generated before starting.

Step 302: Calculate the average length of the water drop at the moment of falling by taking the average value, and measure the corresponding average volume of the water drop with a measuring instrument.

Wherein, in the specific detection process, due to different rainfall conditions, the number of water droplets dropped per unit time is different (the larger the rainfall per unit time, the greater the rainfall collected by the drop-sensitive rainfall detection device per unit time of the present invention, The number of water droplets produced per unit time will also be more). The embodiment of the present invention selects a preset number of water droplets, obtains the length of each drop at the moment of dripping, obtains the average length of the moment of water droplet by means of an average value, and measures the average volume of the water droplet through a measuring device. And make a comparison table or obtain the functional relationship between the length and volume of the water drop at the moment of dripping, for subsequent real-time detection to obtain the volume of each drop of water, 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 uniformly installed in the area, and the data collected by the drop-sensing rain detection devices are converted into precipitation in the target area.

The above descriptions are only preferred embodiments of the present invention, and the present invention cannot list all specific embodiments one by one, so the foregoing specific embodiments are not specific limitations of the present invention, and all within the spirit and principles of the present invention , any modifications, equivalent replacements, improvements, etc., should be included within the protection scope of the present invention.

Claims (10)

1. A drip sensing rain detection device, characterized in that it comprises an outer cylinder (1), a rain base (2), a drainage plate (3), a water drop counter (4) and a laser module (5); The outer cylinder (1) is arranged with upper and lower openings, and a drain plate (3) is arranged in the middle section inside the outer cylinder (1), and a drip opening (31) is arranged at the center of the drain plate (3), so that The drainage plate (3) is arranged downward along the drip opening (31) at a first preset angle; The rain gauge base (2) is arranged under the diversion plate (3), the rain gauge base (2) includes a rain gauge support column (21) and a rain gauge bottom plate (22), and the lower end of the rain gauge support column (21) is arranged on At the center of the rain gauge base plate (22), a first through hole (221) is provided at the center of the rain gauge base plate (22), and a vertical axial drainage channel (211) is provided in the rain gauge support column (21) , the diameter of the drainage channel (211) is greater than the diameter of the drip opening (31), the drainage channel (211), the drip opening (31) and the first through hole (221) are arranged on the same vertical axis, Form the channel for the counting of water droplets; The side wall of the rain support column (21) is provided with a second installation hole (212), and the water drop counter (4) is arranged in the second installation hole (212), perpendicular to the trajectory of the water drop falling and intersecting at one point, To facilitate the counting of falling water droplets; The laser module (5) is arranged directly above the center of the drain plate (3) and is aligned with the drip opening (31), and the laser module (5) emits a laser signal for detecting water droplets formed by the drip opening (31) The length of the drop moment, and the volume of the droplet is obtained by the relationship between the length of the droplet drop moment and the volume of the droplet. 2. The drop-sensing rain detection device according to claim 1, further comprising a splash-proof cone (6), the cone angle of the splash-proof cone (6) is arranged upwardly at a second preset angle, the The bottom of the anti-splash cone (6) is provided with at least two installation posts (61) along the vertical direction, and the said flow guide plate (3) is provided with at least two first installation holes (32), and the installation posts (61 ) is matched with the first installation hole (32), and the installation column (61) is inserted into the first installation hole (32), so that the bottom of the anti-splash cone (6) and the top of the drainage plate (3) The surface is suspended at a preset height. 3. The drop-sensitive rain detection device according to claim 2, characterized in that, the inside of the splash-proof cone (6) is hollow, and the inside of the splash-proof cone (6) is provided with a support frame (62), so that The support frame (62) is used to fix the laser module (5). 4. The drip sensing rain detection device according to claim 3, further comprising a circuit board, the circuit board (7) being arranged between the drainage plate (3) and the rain support column (21), the The circuit board (7) is electrically connected with the water drop counter (4) and the laser module (5). 5. drip sense rain detection device according to claim 1, is characterized in that, the upper surface of described diversion plate (3) is provided with grain (33), and rainwater flows to drip opening (33) uniformly by described grain (33) 31), so that raindrops form water droplets at the lower surface of the drip opening (31). 6. The drip sensing rain detection device according to claim 1, further comprising a bottom rain cover (8), an installation groove (81) is provided on the upper surface of the bottom rain cover (8), and the outer The lower part of the cylinder (1) is inserted into the installation groove (81), the rain gauge bottom cover (8) is provided with a protruding part (82), and the protruding part (82) is provided with a third mounting hole (821), The third installation hole (821) is used for fixing the rain detection device. 7. The drip sensing rain detection device according to claim 2, wherein 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°. 8. The rain sensing device according to claim 1, characterized in that, the drip opening (31) is cylindrical, and the diameter of the drip opening (31) is greater than or equal to 3 mm and less than or equal to 6 mm. 9. A method for using a drop-sensing rain detection device, comprising: According to the preset rainfall gradient, the water droplets formed under different rainfall conditions are simulated in the drip sensing rainfall detection device, and the length of the water drop at the moment of dripping and the corresponding volume of the water drop are obtained; Utilize the drop-sensitive rainfall detection device to detect the rainfall in the target area in real time, obtain the length of the moment when the water droplets formed in the drop-sensitive rain detection device drop, and record according to the time sequence of the drop; By comparing the length of the moment of drop of the water drop formed in the target area with the length of the moment of drop of the drop of water formed under different rainfall conditions simulated in the drop feeling rain detection device, the drop feeling in the target area can be obtained. The volume of water droplets formed in the rainfall detection device and calculates the rainfall in the target area. 10. The method according to claim 9, characterized in that, the length of the moment when the water drop falls and the corresponding volume of the water drop are obtained by taking an average value, specifically comprising: Set the preset number of water droplets, use the water drop counter (4) to detect the falling process of the water droplets, and use the laser module (5) to detect the length of the moment when the water droplets fall after the falling time interval between adjacent water droplets is equal; By taking the average value, the average length of the moment when the water drop falls is calculated, and the corresponding average volume of the water drop is measured by a measuring instrument.

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