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

Abstract

The invention discloses a dripping-sensing rainfall detection device and a using method thereof, wherein the device comprises an outer barrel, a rainfall base, a drainage plate, a water drop counter and a laser module; a drainage plate is arranged in the outer barrel, a water dripping port is formed in the center of the drainage plate, and the drainage plate is arranged downwards at a first preset angle; the rainfall base comprises a rainfall support column and a rainfall bottom plate, the lower end of the rainfall support column is arranged at the center of the rainfall bottom plate, a first through hole is formed in the center of the rainfall bottom plate, a drainage channel is arranged in the rainfall support column, and the drainage channel, the water dripping opening and the through hole are arranged on the same axis; a second mounting hole is formed in the side wall of the rainfall support column, and the water drop counter is arranged in the second mounting hole and is perpendicular to the falling track of rainwater and intersected at a point so as to count water drops; the laser module is aligned with the drip opening and is used for detecting the length of the water drop at the moment of dripping. According to the invention, the laser module is used for measuring the length of the water drop at the dropping moment, the volume of the water drop is calibrated, and the measurement accuracy is improved.

Description

Dripping-feeling rainfall detection device and use method thereof

Technical Field

The invention relates to the technical field of rainfall detection, in particular to a dripping-feeling rainfall detection device and a using method thereof.

Background

Rainfall detection can record rainfall data in real time, rainfall in different areas of each region can be detected through the acquired rainfall data, and a certain guiding effect is achieved on agricultural irrigation. The precipitation amount greatly affects various fields such as production and life of human beings. If the rainfall is too much, natural disasters such as flood disasters, landslides, debris flows and the like can be caused, and great economic loss and inconvenience are caused to the production and the life of human beings; if the precipitation is too little, the contradiction between domestic water, farmland irrigation water and factory water can be added; causing salinization or desertification of the land, and the like. The significance of installing the rainfall detection system is to integrate the data of the past rainfall in time, make adjustments and reduce the harm caused by rainfall.

In order to make precipitation have high accuracy and comparability, the meteorological observation specifications stipulate that: precipitation refers to the depth of liquid or solid (after melting) precipitation from the sky down to the ground, which accumulates on the water surface without evaporation, penetration, loss. Precipitation is in millimeters. The traditional rainfall measuring instrument can be mainly divided into a tipping bucket type rain gauge, a weighing type rain gauge and a piezoelectric type rain gauge according to the principle. The traditional instrument for measuring the rainfall is large in size and low in detection accuracy, and is difficult to integrate electronic devices for rainfall detection with other devices.

In view of this, overcoming the drawbacks of the prior art is a problem to be solved urgently in the art.

Disclosure of Invention

The invention aims to solve the problems that the existing rain gauge for measuring the rainfall is large in size, low in measurement accuracy rate and difficult to integrate with other devices.

The invention is realized by the following steps:

in a first aspect, the invention provides a dripping-sensing rainfall detection device, which comprises an outer barrel, a rainfall base, a drainage plate, a water drop counter and a laser module, wherein the outer barrel is provided with a water inlet and a water outlet;

the outer barrel is provided with an upper opening and a lower opening, a drainage plate is arranged at the middle section of the inner part of the outer barrel, a water dripping opening is formed in the center of the drainage plate, and the drainage plate is arranged at a first preset angle downwards along the water dripping opening;

the rainfall base is arranged below the drainage plate and comprises a rainfall support column and a rainfall bottom plate, the lower end of the rainfall support column is arranged at the center of the rainfall bottom plate, a first through hole is formed in the center of the rainfall bottom plate, a vertical axial drainage channel is arranged in the rainfall support column, the diameter of the drainage channel is larger than that of the drip opening, and the drainage channel, the drip opening and the first through hole are arranged on the same vertical axis to form a channel for counting water drops;

the side wall of the rainfall support column is provided with a second mounting hole, and the water drop counter is arranged in the second mounting hole and is perpendicular to the falling track of the water drops and perpendicular to one point, so that the falling water drops can be counted conveniently;

the laser module is arranged right above the center of the drainage plate and aligned with the water dripping port, the laser module emits a laser signal for detecting the instantaneous length of the water dripping port formed by the water dripping, and the relationship between the instantaneous length of the water dripping and the volume of the water dripping is used for obtaining the volume of the water dripping.

Preferably, still include the splashproof awl, the cone angle of splashproof awl upwards is the second and predetermines the angle setting, the bottom of splashproof awl is provided with two at least erection columns along vertical direction, be provided with two at least first mounting holes on the drainage plate, the erection column with first mounting hole matches, the erection column inserts in the first mounting hole to the bottom that makes the splashproof awl is preset highly to hang the setting with the drainage plate upper surface.

Preferably, the splashproof awl is inside to be cavity setting, the inside support frame that is provided with of splashproof awl, the support frame is used for fixed laser module.

Preferably, still include the circuit board, the circuit board sets up between drainage plate and rainfall support column, the circuit board with water droplet counter and laser module electric connection.

Preferably, the upper surface of drainage plate is provided with the line, and the rainwater passes through the even flow direction of line drips the edge of mouth everywhere to the raindrop forms the water droplet in mouthful lower surface department that drips.

Preferably, the rainfall detection device further comprises a rainfall bottom cover, wherein an installation groove is formed in the upper surface of the rainfall bottom cover, the lower portion of the outer barrel is inserted into the installation groove, a protruding portion is formed in the rainfall bottom cover, a third installation hole is formed in the protruding portion, and the third installation hole is used for fixing the rainfall detection device.

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

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

In a second aspect, the present invention provides a method for using a dripping-sensation rainfall detection device, based on the dripping-sensation rainfall detection device, including:

simulating water drops formed under different rainfall conditions in the dripping rainfall detection device according to a preset rainfall gradient, and acquiring 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 dripping-feeling rainfall detection device, acquiring the length of a dripping moment of water drops formed in the dripping-feeling rainfall detection device, and recording according to the dripping time sequence;

and obtaining the volume of the water drops formed in the dripping-sensation rainfall detection device in the target area by comparing the length of the water drops formed in the target area at the dripping moment with the length of the water drops formed under different rainfall conditions simulated in the dripping-sensation rainfall detection device, and calculating the rainfall in the target area.

Preferably, the length of the water drop at the instant of dropping and the corresponding volume of the water drop are obtained by taking an average value, and the method specifically includes:

setting the preset number of water drops, detecting the falling process of the water drops by using a water drop counter, and detecting the length of the water drops at the moment of falling by using a laser module after the falling time intervals between adjacent water drops are equal;

and calculating the average length of the water drop at the moment of dripping by taking an average value, and measuring the corresponding average volume of the water drop by using a measuring instrument.

The invention measures the length of the raindrop collected by the dripping-sensing rainfall detection device at the moment when the raindrop forms a water drop at the water dropping opening by arranging the laser module so as to calibrate the volume of the water drop and further improve the rainfall detection accuracy.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a water droplet dropping moment at a dropping opening according to an embodiment of the present invention;

fig. 2 is a schematic overall structural diagram of a dripping-sensation rainfall detection device according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional structure diagram of a device for detecting dripping-induced rainfall according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a rainfall base of the device for detecting dripping-induced rainfall according to the embodiment of the present invention;

fig. 5 is a schematic structural diagram of a rainfall baseplate of a device for detecting dripping-induced rainfall according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a splash cone of the dripping rainfall detection device according to the embodiment of the present invention;

fig. 7 is a schematic structural diagram of a support frame of a dripping rainfall detection device according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a circuit board position structure of a device for detecting dripping rainfall according to an embodiment of the present invention;

fig. 9 is a top view of a drainage plate of a device for detecting dripping rainfall according to an embodiment of the present invention;

fig. 10 is a schematic structural view of a rainfall bottom cover of the device for detecting rainfall according to the embodiment of the present invention;

fig. 11 is a flowchart illustrating a method for detecting a dripping sensation of rainfall according to an embodiment of the present invention;

fig. 12 is a flowchart illustrating a method for using a device for detecting dripping rainfall according to an embodiment of the present invention;

wherein the reference numbers are:

1-outer cylinder; 11-cutting edge; 2-rainfall foundation; 21-rainfall support columns; 211-a drainage channel; 212-a second mounting hole; 22-rainfall floor; 221-a first via; 3-a drainage plate; 31-a drip; 32-a first mounting hole; 33-texture; 4-a water drop counter; 5-a laser module; 6, an anti-splash cone; 61-mounting posts; 62-a support frame; 7-a circuit board; 8-rainfall bottom cover; 81-mounting grooves; 82-a projection; 821-third mounting hole.

Detailed Description

In the description of the present invention, the terms "inner", "outer", "longitudinal", "lateral", "upper", "lower", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are for convenience only to describe the present invention without requiring the present invention to be necessarily constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

the embodiment of the invention provides a dripping-induced rainfall detection device, which comprises an outer barrel 1, a rainfall base 2, a drainage plate 3, a water drop counter 4 and a laser module 5, wherein the outer barrel is provided with a water inlet and a water outlet;

the outer barrel 1 is provided with an upper opening and a lower opening, the middle section of the inner part of the outer barrel 1 is provided with a drainage plate 3, the center of the drainage plate 3 is provided with a water dripping opening 31, and the drainage plate 3 is arranged downwards along the water dripping opening 31 at a first preset angle;

the rainfall base 2 is arranged below the drainage plate 3, the rainfall base 2 comprises a rainfall support column 21 and a rainfall bottom plate 22, the lower end of the rainfall support column 21 is arranged at the center of the rainfall bottom plate 22, a first through hole 221 is formed in the center of the rainfall bottom plate 22, a vertical axial drainage channel 211 is arranged in the rainfall support column 21, the diameter of the drainage channel 211 is larger than that of the water dripping opening 31, and the drainage channel 211, the water dripping opening 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 rainfall 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 and is perpendicular to and intersected with the falling track of the water drops at a point so as to count the falling water drops;

the laser module 5 is arranged right above the center of the drainage plate 3 and is aligned to the water dripping opening 31, the laser module 5 emits a laser signal for detecting the instant length of the water dripping formed by the water dripping opening 31, and the volume of the water drops is obtained through the relationship between the instant length of the water dripping and the volume of the water drops.

Fig. 1 is a schematic view showing a state of a water droplet at the moment of dropping at a dropping port, in which a water film layer formed at the dropping port is not shown in order to clearly see the state of the water droplet. The raindrops form drops at the drip opening 31 and are separated from the drip opening 31 to drop into the drainage channel 211. In the process, based on the tension in the water drop, the form of the water drop can be changed in a series, after the raindrops are converged to form the water drop, the length of the water drop in the vertical direction (the gravity direction) can be lengthened, when the maximum value is reached (corresponding to the instant when the water drop drops), the water drop can be separated from the water dropping opening 31, and then the water drop can be rebounded under the action of the tension in the water drop. Theoretically, analysis shows that the instant when the water drops corresponds to the moment when the vertical length of the water drops is maximum, and the volume of the water drops corresponds to the instant length of the water drops one by one.

In an actual application scenario, different rainfall conditions and different rainfall states affect the volume of a water drop during dripping, and further the length of the water drop at the moment of dripping is changed, so that the volume of each dripping drop is not changed in the process of dripping the water drop, the rainfall is calculated by multiplying the quantity of the raindrops by a fixed volume at present, and the problem of inaccurate detection exists in the mode of calculating the rainfall by the fixed volume under different conditions and different volumes of the water drops.

In order to solve the foregoing problem, in this embodiment, when the rainfall detection device senses rainfall in the target area, the laser module 5 disposed in the detection device is used to measure the length of the water drop at the moment of dripping, and the real volume of the water drop is obtained through the relationship between the volume of the water drop and the length of the water drop at the moment of dripping (the volume of the rain drop can be determined through table lookup or a functional relationship), so as to measure the rainfall in the target area.

It should be noted that different rainfall conditions of the present invention indicate the rainfall in the target area, and different raindrop states indicate the speed, direction, acceleration, etc. of raindrops in the target area entering the detecting device of the present invention. For the sake of distinction, droplets entering the detection device during precipitation are collectively referred to as raindrops, and droplets formed by raindrops from the dripping opening 31 are collectively referred to as water droplets.

As shown in fig. 2-5, the outer barrel 1 of the present invention is provided with an upper opening and a lower opening, the laser module 5 is provided right above the center of the drainage plate 3 and aligned with the drip opening 31, the laser module 5 includes a laser emitting component and a laser receiving component, the laser emitting component emits a laser signal, the laser signal firstly passes through the upper surface of the water drop, the laser signal is reflected and transmitted under the action of the upper surface of the water drop, the laser signal is divided into two parts, 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 into the water drop; after the second part of laser signals reach the lower surface of the water drop, the second part of laser signals are also divided into two parts, namely a third part of laser signals and a fourth part of laser signals, the third part of laser signals are reflected into the laser module 5, and the fourth part of laser signals are transmitted and enter the air from the water drop.

Therefore, the laser module 5 can measure the length change of the water drop along the direction of gravity (dropping track) in real time only by analyzing the first part of laser signal and the third part of laser signal reflected to the laser module 5, specifically, the time difference of the first part of laser signal and the second part of laser signal transmitted to the laser module 5 is obtained, and the length of the water drop at the moment can be obtained by dividing the time difference by 2 and multiplying the time difference by the transmission speed of the laser signal.

Based on the change of the water drop form, the invention can know the length of the water drop at the dropping moment by analyzing the reflected laser signals in different states through the laser module 5, and the specific analysis is as follows: as shown in fig. 1, when a water drop falls for a very short period of time, it can be considered that a water film is formed at the water dropping opening 31, an air gap exists between the water drop and the water film at the water dropping opening 31, and the laser module 5 receives the reflection signals of the upper and lower surfaces of the water film at the water dropping opening 31 and the reflection signals of the upper and lower surfaces of the water drop; when the water droplet did not drip (did not form the water droplet), laser module 5 only can receive the reflection signal of the upper and lower surface of the mouth 31 water film that drips, and laser module 5 can obtain the corresponding moment in the twinkling of an eye that the water droplet drips through the quantity change of analysis reflection signal, and then measures the length that the water droplet corresponds this moment. The formed water drops are counted by the water drop counter 4, the lengths of the water drops are sequentially measured according to the dropping sequence of the water drops, and the lengths are sequentially converted into the calibrated volume of the water drops, so that the purpose of improving the precipitation measurement accuracy of the target area is achieved.

The invention corrects the volumes of the water drops in different states by utilizing the relation between the length of the water drop at the dripping moment and the volume of the water drop, and measures the length of the water drop at the dripping moment formed by the raindrops collected by the dripping-sensing rainfall detection device at the dripping opening 31 through the laser module 5 so as to calibrate the real volume of the water drop and further improve the rainfall detection accuracy.

The details of the invention are explained in detail below in order to illustrate the complete concept of the invention. In order to avoid raindrops from dripping into the detection device to generate sputtering as far as possible, the collected rainfall is reduced, and the problem of inaccurate measurement is caused. As shown in fig. 6, still include splashproof awl 6, the angle setting is predetermine to the second upwards to the cone angle of splashproof awl 6, the bottom of splashproof awl 6 is provided with two at least erection columns 61 along vertical direction, be provided with two at least first mounting holes 32 on the drainage plate 3, erection column 61 with first mounting hole 32 phase-match, erection column 61 inserts in first mounting hole 32 to make the bottom of splashproof awl 6 and the 3 upper surfaces of drainage plate be preset highly hang the setting. According to the invention, the splash-proof cone 6 is arranged, so that raindrops can be controlled to be kept in the detection device of the invention as far as possible even if the raindrops splash through the buffer action of the conical surface of the splash-proof cone 6 after the raindrops drop into the detection device of the invention (the raindrops can splash on the inner wall of the outer barrel 1 of the invention, so that the raindrops can not splash out of the detection device of the invention).

In order to enable raindrops to be smoothly converged to the water dripping opening 31, a certain interval is required between the splash-proof cone 6 and the drainage plate 3, the splash-proof cone 6 is provided with the first mounting column 61 at the bottom, the first mounting hole 32 is arranged at the corresponding position on the drainage plate 3, and the splash-proof cone 6 is inserted into the first mounting hole 32 through the first mounting column 61 to form a suspended arrangement structure. The diameter of the bottom surface of the splash-proof cone 6 is smaller than the inner diameter of the outer barrel 1, so that raindrops can smoothly enter the drainage plate 3, the drainage plate 3 is arranged downwards along the water dropping opening 31 at a first preset angle, so that the raindrops can smoothly converge into the water dropping opening 31, when the raindrops in the water dropping opening 31 converge to a certain degree, water drops can be formed and drip from the drainage channel 211, the water drops are counted by the water drop counter 4, the dripping length of the water drops in the detection process is obtained, and the actual volume of the water drops is obtained.

It is worth noting that before the actual volume of the water drop is obtained, the method also needs to simulate the relationship between the length of the water drop at the dropping moment and the actual volume of the water drop, make a table or a functional relationship, and obtain the actual volume of the water drop in the actual detection process in a table look-up manner. The specific implementation mode is as follows: and acquiring the length of the water drop at the moment of actually detecting the water drop in the target area, acquiring the real volume of the water drop through a simulated table or function relation, and further measuring the precipitation in the target area.

The preset height of the splash-proof cone 6 is set according to actual requirements, and the splash-proof cone is not too high or too low. The splash-proof cone 6 is arranged in the dripping-feeling rainfall detection device, so that the loss of water drops dripping into the device can be reduced as much as possible, and the measurement accuracy is improved. In addition, the present invention is based on the principle that water droplets are formed in the detection device, and the amount of rainfall in the target area is calculated from the number of water droplets detected per unit time. Based on the detection principle of the invention, the opening of the invention can be designed to be very small (for example, the diameter of the outer cylinder 1 is directly designed to be dozens of centimeters), compared with the existing rainfall measuring instrument, the volume of the opening can be set to be small enough, and the opening can be more suitable for the requirement of miniaturization and integration.

The problem that the laser module 5 is short-circuited and failed due to the fact that the laser module 5 arranged in the dripping rainfall detection device is contacted with raindrops is solved; and the laser module 5 generates deviation in the detection process, thereby causing the problem of measurement failure or inaccuracy. The anti-splash cone 6 is hollow, the anti-splash cone 6 is internally provided with a support frame 62, and the support frame 62 is used for fixing the laser module 5.

According to the embodiment of the invention, the laser module 5 is fixed inside the splash-proof cone 6, and the problem of short circuit failure of the laser module 5 caused by the fact that the laser module 5 contacts raindrops can be effectively avoided by utilizing the protection effect of the splash-proof cone 6. In addition, according to the invention, the support frame 62 is arranged in the anti-splash cone 6, and the support frame 62 is mainly used for fixing the laser module 5, so that the laser module 5 can be stably aligned with the water dripping opening 31, and the track of the laser signal emitted by the laser module 5 is always coincident with the dripping track of water drops. As shown in fig. 7, a specific structural schematic diagram of the support frame 62 of the present invention is shown, the support frame 62 of the present invention mainly plays a role in fixing, and may be a structure shown in the drawing, or may be a hook structure (a mounting hole is provided on the laser module 5, and the hook is hooked on the laser module 5), and the laser module 5 may be directly welded inside the splash-proof cone 6 (the splash-proof cone 6 is used as the support frame 62).

In order for the drop counter 4 and the laser module 5 of the present invention to work smoothly, it is necessary to supply power to the drop counter 4 and the laser module 5. As shown in fig. 8, the present invention further includes a circuit board 7, wherein the circuit board 7 is disposed between the flow guide plate 3 and the rainfall 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 drops, the water drop counter 4 needs to be perpendicular to and intersect with the falling trajectory of the water drops, so as to count the falling water drops. In order to avoid the contact between the circuit and the water drop counter 4 and the laser module 5, the circuit board 7 is hollowed (arranged in a hollow structure) at the center of a specific mounting column 61 at the bottom of the splash-proof cone 6, and the wire connected between the circuit board 7 and the water drop counter 4 and the laser module 5 is put into the mounting column 61. It should be noted that, in order to make the water drops smoothly drop in the drainage channel 211, after the water drops are formed at the water dropping opening 31, the path of the water drops dropping on the drainage channel 211 should be ensured to be free of any shielding object, the center of the circuit board 7 is disposed in a hollow manner, and in general, the diameter of the aperture 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 is arranged downwards along the water dripping opening 31 at a first preset angle, when the preset angle is too large, raindrops are easy to gather at the water dripping opening 31 and cannot form water drops (water can flow out from the water dripping opening 31 in a water flow mode), when the preset angle is too small, the raindrops are difficult to gather at the water dripping opening 31, and experiments show that the requirement on measurement accuracy can be met when the first preset angle is less than or equal to 15 degrees and more than or equal to 5 degrees.

The splash-proof cone 6 is mainly used for preventing raindrops from splashing out of the detection device, the angle (a second preset angle) of the splash-proof cone 6 is not too large or too small, and the angle of the splash-proof cone 6 is set to be less than or equal to 95 degrees and more than or equal to 70 degrees. Experiments show that when the temperature is set between 70 degrees and 95 degrees, the requirement of detection precision can be met (rain drops are splashed out of the detection device as little as possible).

In order to allow raindrops falling into the detecting device of the present invention to smoothly form water drops at the drip opening 31, and detection can be performed by the drop counter 4. The diameter of the water dripping opening 31 is not too large or too small. When the diameter of the water dropping opening 31 is too large, it is difficult for the raindrops to form water drops at the fixed position of the water dropping opening 31 (the position where the raindrops are formed may be changed), or the raindrops may flow into the drainage channel 211 in the form of water flow from the side wall of the water dropping opening 31, and no water drops may be formed; when the aperture of the water dropping opening 31 is too small, raindrops are difficult to drop from the water dropping opening 31, and when the rainfall is large enough, the raindrops form a water column in a spraying manner, and flow into the drainage channel 211 from the water dropping opening 31, so that water drops cannot be formed, and the detection device cannot perform measurement. Through experimental tests, the water dripping opening 31 is cylindrical, and the diameter of the water dripping opening 31 is larger than or equal to 3 mm and smaller than or equal to 6 mm. The diameter of the specific water dripping opening 31 is determined according to the precision requirement.

In order to prevent the raindrops from being gathered along each direction of the water dripping opening 31 in the process of flowing into the water dripping opening 31 through the drainage plate 3, the formed raindrops are not uniform, and further, the measurement error is caused. As shown in fig. 9, the upper surface of the drainage plate 3 of the present invention is provided with a texture 33, and rainwater flows uniformly to all positions of the edge of the water dropping opening 31 through the texture 33, so that the rainwater drops on the lower surface of the water dropping opening 31. Through the arrangement of the grains 33, raindrops can be firstly wetted on the drainage plate 3 and can move along the grains 33, and for the side with the higher water flow speed, the time and the flow speed reaching the water dripping opening 31 can be slightly reduced through the blocking effect of the grains 33, so that stable water drops can be formed, and the measuring accuracy of the invention is improved.

Further, as shown in fig. 10, the present invention further includes a rainfall bottom cover 8, wherein an installation groove 81 is formed on an upper surface of the rainfall bottom cover 8, and a lower portion of the outer tub 1 is inserted into the installation groove 81, so that the outer tub 1 and the rainfall bottom cover 8 are fixed. The rainfall bottom cover 8 is provided with a protruding portion 82, a third mounting hole 821 is arranged in the protruding portion 82, and the third mounting hole 821 is used for fixing the rainfall detection device. The present invention is fixed at a position where the installation is required through the third installation hole 821 on the rainfall bottom cover 8. Accordingly, the present invention may be secured in place using pins, screws or welding, as may be practical.

In order to further prevent raindrops from splashing out through the detection device, as shown in fig. 2, a cutting edge 11 is disposed on the top of the outer cylinder 1, 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 requirements.

The invention corrects the volumes of the water drops in different states by utilizing the relation between the length of the water drop at the dripping moment and the volume of the water drop, and measures the length of the water drop at the dripping moment formed by the raindrops collected by the dripping-sensing rainfall detection device at the dripping opening 31 through the laser module 5 so as to calibrate the real volume of the water drop and further improve the rainfall detection accuracy.

Example 2:

the present invention also provides a method for using the dripping sensation rainfall detection device of embodiment 1, as shown in fig. 11, specifically including:

step 201: according to a preset rainfall gradient, water drops formed under different rainfall conditions are simulated in the rainfall sensing detection device, and the instantaneous length of the dropping of the water drops and the corresponding volume of the water drops are obtained.

In the embodiment of the invention, the relationship between the length of the water drop at the dropping moment and the volume of the water drop is obtained in advance, and a table (comparison table) is prepared or a functional relationship is obtained. When rainfall detection is carried out on a target area, the instantaneous length of water drops falling is detected in real time through the laser module 5, and the real volume of the corresponding water drops is obtained through comparison or functional relation. It should be noted that the actual volume of the drop obtained by the present invention also has some error, but the accuracy of the embodiment of the present invention is significantly improved compared to the case where each drop is generated as a fixed volume value, and the device for measuring the drop volume can be omitted in the process of real-time measurement. Before real-time measurement, the invention firstly needs to obtain the relationship between the length of the water drop at the dripping moment and the real volume of the water drop, obtains the volume of the water drop measured in real time by measuring the length of the water drop at the dripping moment in real time and looking up a table or utilizing a functional relationship, and further determines the precipitation in a target area. It is noted that during the simulation, the volume of the water drop needs to be measured with a measuring tool; in the actual real-time detection process, the volume of the water drop is not required to be measured by using a measuring tool, and the volume of the water drop can be obtained only by comparison.

Step 202: and detecting the rainfall condition of a target area in real time by using the rainfall sensing device, acquiring the length of a dripping moment of water drops formed in the rainfall sensing device, and recording according to the dripping time sequence.

The invention mainly utilizes the laser module 5 to obtain the length of the water drop at the dripping moment. The laser module 5 at least comprises a transmitting submodule, a receiving submodule and an analyzing submodule; the transmitting submodule is mainly used for transmitting laser signals, the receiving submodule is mainly used for receiving the transmitted laser signals, and the analyzing module is used for analyzing the number of the reflected laser signals, the time difference of the laser signals reflected twice in the water drop and the propagation speed of the laser signals in the water drop so as to obtain the instantaneous dropping length of the water drop.

This implementation will be explained in detail below: after the raindrops are separated from the dripping port 31 to form water drops, the number of the laser signals received by the receiving sub-module of the laser module 5 is increased by two (explained above, and not described herein), and the critical moment at the dripping moment of the water drops is obtained through the change of the number of the laser signals; and calculating the length of the water drop at the moment of dripping according to the time difference of the laser signals reflected twice in the water drop and the propagation speed of the laser signals in the water drop.

Step 203: and obtaining the volume of the water drops formed in the dripping-sensation rainfall detection device in the target area by comparing the length of the water drops formed in the target area at the dripping moment with the length of the water drops formed under different rainfall conditions simulated in the dripping-sensation rainfall detection device, and calculating the rainfall in the target area.

After the length of the water drop at the dropping moment is obtained, the real volume of the water drop is obtained through table lookup or function relation. The invention obtains the relationship between the length of the water drop at the instant of dripping and the volume of the water drop in advance, obtains the real volume of the water drop under different rainfall quantities, and measures the length of the raindrop collected by the dripping sensing rainfall detection device in real time at the instant of dripping of the water drop at the dripping opening 31 through the laser module 5 so as to obtain the real volume of the water drop in the real-time detection process, thereby improving the accuracy of the rainfall detection.

In order to reduce the measurement error as much as possible, the rainfall in the target area is generally measured in an average manner. The invention obtains the length of the water drop at the dripping moment in real time by the dripping sensing rainfall detection device and calculates the length by using an average value mode no matter the relation between the length of the water drop at the dripping moment and the real volume of the water drop at different rainfall is obtained by simulation in advance or in a target area. Next, the relationship between the length of the water drop at the moment when the water drop drops with different rainfall amounts and the volume of the water drop is obtained in advance by simulation. In the embodiment of the present invention, the length of the water drop at the dropping moment and the corresponding volume of the water drop are obtained by taking an average value, as shown in fig. 12, the method specifically includes:

step 301: the preset number of water drops is set, the falling process of the water drops is detected by the water drop counter 4, and after the falling time intervals between adjacent water drops are equal, the instantaneous length of the water drops falling is detected by the laser module 5.

The dripping-sensation rainfall detection device provided by the embodiment of the invention firstly needs to be wetted, and then simulates and obtains the relation between the length of a water drop at the moment of dripping and the volume of the water drop, and starts to detect the length of the water drop at the moment of dripping in a target area in real time after the water drop is stably generated.

Step 302: and calculating the average length of the water drop at the moment of dripping by taking an average value, and measuring the corresponding average volume of the water drop by using a measuring instrument.

In the specific detection process, the number of water drops dropped in unit time is different under different rainfall conditions (the larger the rainfall in unit time is, the larger the rainfall collected in unit time is, the larger the number of water drops generated in unit time is). The embodiment of the invention selects a preset number of water drops, obtains the length of each water drop at the dripping moment, obtains the average length of the water drops at the dripping moment in an average value mode, and measures the average volume of the water drops through a measuring device. And a comparison table is made or a function relation between the length and the volume of the water drop at the dropping moment is obtained for subsequent real-time detection to obtain the volume of each water drop, and then the precipitation in unit time in the target area is calculated. It should be noted that, in the actual measurement process, a certain number of the drip sensing rainfall detection devices are generally uniformly arranged in the area, and the data collected by the drip sensing rainfall detection devices is converted into the rainfall in the target area.

The above description is only a preferred embodiment of the present invention, and the present invention is not intended to be limited to the above embodiment, and any modifications, equivalent substitutions, improvements and the like within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A dripping-sensing rainfall detection device is characterized by comprising an outer barrel (1), a rainfall base (2), a drainage plate (3), a water drop counter (4) and a laser module (5);

the outer barrel (1) is provided with an upper opening and a lower opening, the middle section of the inner part of the outer barrel (1) is provided with a drainage plate (3), a water dripping opening (31) is formed in the center of the drainage plate (3), and the drainage plate (3) is arranged downwards along the water dripping opening (31) at a first preset angle;

the rainfall base (2) is arranged below the drainage plate (3), the rainfall base (2) comprises a rainfall support column (21) and a rainfall bottom plate (22), the lower end of the rainfall support column (21) is arranged at the center of the rainfall bottom plate (22), a first through hole (221) is formed in the center of the rainfall bottom plate (22), a vertical axial drainage channel (211) is arranged in the rainfall support column (21), the diameter of the drainage channel (211) is larger than that of the water dripping opening (31), and the drainage channel (211), the water dripping opening (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 rainfall 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) and is perpendicular to the falling track of the water drops and intersected at a point so as to count the falling water drops;

the laser module (5) is arranged right above the center of the drainage plate (3) and aligned to the dripping opening (31), and the laser module (5) emits a laser signal for detecting the instantaneous length of the dripping opening (31) for forming water drops and obtaining the volume of the water drops through the relation between the instantaneous length of the water drops and the volume of the water drops.

2. The device for detecting the dripping-induced rainfall according to claim 1, further comprising an anti-splash cone (6), wherein the cone angle of the anti-splash cone (6) is upward, the second angle is preset, at least two mounting columns (61) are arranged at the bottom of the anti-splash cone (6) along the vertical direction, at least two first mounting holes (32) are formed in the drainage plate (3), the mounting columns (61) are matched with the first mounting holes (32), and the mounting columns (61) are inserted into the first mounting holes (32) so that the bottom of the anti-splash cone (6) and the upper surface of the drainage plate (3) are in a preset height suspension setting.

3. The dripping rainfall detection device of claim 2, wherein the splash cone (6) is hollow, the splash cone (6) is provided with a support frame (62), and the support frame (62) is used for fixing the laser module (5).

4. The device for detecting the raindrop sensation according to claim 3, further comprising a circuit board, wherein the circuit board (7) is arranged between the flow guide plate (3) and the rainfall support column (21), and the circuit board (7) is electrically connected with the water drop counter (4) and the laser module (5).

5. The dripping rainfall detection device of claim 1, wherein the upper surface of the drainage plate (3) is provided with a texture (33), and rainwater flows uniformly through the texture (33) to all positions of the edge of the dripping opening (31) so as to form water drops on the lower surface of the dripping opening (31).

6. A drip sensing rainfall amount detection device according to claim 1, further comprising a rainfall amount bottom cover (8), wherein an upper surface of the rainfall amount bottom cover (8) is provided with a mounting groove (81), a lower portion of the outer tub (1) is inserted into the mounting groove (81), the rainfall amount bottom cover (8) is provided with a protrusion (82), a third mounting hole (821) is provided in the protrusion (82), and the third mounting hole (821) is used for fixing the rainfall amount detection device.

7. The dripping rainfall detection device of claim 2, wherein the first predetermined angle is equal to or less than 15 ° and equal to or greater than 5 °; the second preset angle is less than or equal to 95 degrees and greater than or equal to 70 degrees.

8. The dripping sensation rainfall amount detection device according to claim 1, wherein the dripping opening (31) is cylindrical, and a diameter of the dripping opening (31) is 3 mm or more and 6 mm or less.

9. A method of using a dripping rainfall detection device, comprising:

simulating water drops formed under different rainfall conditions in the dripping rainfall detection device according to a preset rainfall gradient, and acquiring 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 dripping-feeling rainfall detection device, acquiring the length of a dripping moment of water drops formed in the dripping-feeling rainfall detection device, and recording according to the dripping time sequence;

and obtaining the volume of the water drops formed in the dripping-sensation rainfall detection device in the target area by comparing the length of the water drops formed in the target area at the dripping moment with the length of the water drops formed under different rainfall conditions simulated in the dripping-sensation rainfall detection device, and calculating the rainfall in the target area.

10. The method for using the device for detecting rainfall by dripping according to claim 9, wherein the length of the moment when the water drop drips and the corresponding volume of the water drop are obtained by taking an average value, and specifically comprises:

setting the preset number of water drops, detecting the falling process of the water drops by using a water drop counter (4), and detecting the length of the dropping moment of the water drops by using a laser module (5) after the falling time intervals between adjacent water drops are equal;

and calculating the average length of the water drop at the instant of dropping by taking an average value, and measuring the average volume corresponding to the water drop by using a measuring instrument.

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