KR20230129864A - Method for Predicting rain gaging using Hybrid Rain Sensor having rain gaging function - Google Patents

Abstract

A hybrid rainfall measurement device according to an embodiment of the present invention includes an optical rainfall measurement module including a light-emitting element that emits infrared rays and a light-receiving element that receives infrared rays emitted from the light-emitting element, and a plurality of electrodes to which current is applied. It includes a dielectric constant rainfall measurement module and an optical waveguide that provides a movement path through which infrared rays emitted from the light-emitting device enter and are received by the light-receiving device.

Description

Rainfall prediction method using a hybrid rain sensor capable of measuring rainfall {Method for Predicting rain gaging using Hybrid Rain Sensor having rain gaging function}

The present invention relates to a rainfall prediction method using a hybrid rain sensor that allows more accurate rainfall measurement by combining optical and dielectric methods.

There are various known methods for measuring rainfall. Among them, the optical method irradiates infrared rays to windshields or vehicle windows where raindrops form, and measures the amount of rainfall through the amount of infrared rays received after light scattering. And in the case of a method using dielectric constant, the amount of water attached to a specific surface is measured using the dielectric constant of water.

However, in both of the above methods, when it rains, the amount of water is primarily measured by specifying the water that forms on the surface, and the amount of rainfall is measured according to the amount of water on the surface.

Therefore, depending on the specific type of rainfall, such as drizzle or shower, the form of rain that forms on the surface or exists on the surface at the time of measurement is different, and there is a problem that different amounts of rainfall measurement data are calculated even under the same conditions.

Republic of Korea Patent Publication No. 10-1195962

The present invention is intended to solve the above problems and provides a rainfall prediction method using a hybrid rain sensor capable of measuring hybrid rainfall, which can be equipped with optical and dielectric type rainfall measurement modules with a simple structure.

The problem to be solved by the present invention is not limited to the above-mentioned problems, and problems not mentioned can be clearly understood by those skilled in the art from this specification and the attached drawings. .

The hybrid rain sensor capable of measuring hybrid rainfall of the present invention to solve the above problems is an optical rainfall measurement module including a light-emitting element that emits infrared rays and a light-receiving element that receives infrared rays emitted from the light-emitting element, and a current-applied rain sensor. It further includes a dielectric constant rainfall measurement module including a plurality of electrodes, and an optical waveguide that provides a movement path through which infrared rays emitted from the light-emitting device enter and are received by the light-receiving device.

The optical rainfall measurement module includes a moving guide disposed in the vertical direction, a coupling part coupled to the moving guide so as to be movable in the upward and downward directions, and a light emitting element that is bent at the rear end based on the vertical direction at one end of the coupling part. It may include a light-receiving element coupling portion that is bent toward the rear end based on the vertical direction at one end of the coupling portion and the coupling portion.

The optical waveguide includes a main body disposed to face the coupling portion, an inflow part provided on one side of the main body and having a first inclined surface facing the light-emitting device coupling portion, and a main body disposed on the other side of the main body. It may include an outflow part having a second slope facing the light receiving element coupling part.

The dielectric constant rainfall measurement module may be coupled to the front of the main body.

A plurality of dielectric constant rainfall measurement modules may be provided in the upper and lower directions.

The rainfall prediction method of the present invention to solve the above problems includes a rainfall measurement step of actually measuring the amount of rainfall for rain, and irradiating infrared rays to the measurement target surface for rain falling under the same conditions as the rainfall actual measurement step, so that the rain is measured. An optical data securing step of securing data on the surface area located on a surface, a first database for rainfall information that matches the optical data by matching the optical data secured in the optical data securing step with the rainfall measured in the actual rainfall measurement step. In the first database securing step of securing, the optical data measurement step of securing optical data on the surface area of raindrops located on the measurement target surface for rain by irradiating infrared rays to the measurement target surface during rainfall, and the optical data measurement step. It includes a first rainfall prediction step of predicting rainfall by selecting a matching first rainfall amount from the first database secured in the first database securing step based on the secured optical data.

A dielectric constant data securing step of applying an electric field to the measurement target surface for rain falling under the same conditions as the rainfall actual measurement step and securing data on the volume of water distributed on the measurement target surface through changes in storage capacity according to the volume of water. , A second database securing step of securing a second database for rainfall information matching the dielectric constant data by matching the dielectric constant data secured in the dielectric constant data securing step with the rainfall measured in the rainfall actual measurement step, on the measurement target surface in case of rainfall. A dielectric constant data measurement step of applying an electric field and securing data on the volume of water distributed on the measurement target surface through changes in storage capacity according to the volume of water. Based on the dielectric constant data obtained in the dielectric constant data measurement step, the second A second rainfall prediction step of predicting the rainfall by selecting the matching second rainfall from the second database secured in the database securing step, a rainfall verification step of verifying the rainfall by comparing the first rainfall and the second rainfall, and If the difference between the values of the first rainfall and the second rainfall is outside a preset range, it includes a third rainfall prediction step of predicting the intermediate value of the first rainfall and the second rainfall as the third rainfall.

It further includes a first monitoring step of monitoring whether the rate of change of the first rainfall predicted in the first rainfall prediction step is within a set range, and if the rate of change of the first rainfall in the first monitoring step deviates from the set range, A dielectric constant data securing step of applying an electric field to the measurement target surface for rain falling under the same conditions as the actual rainfall measurement step and securing data on the volume of water distributed on the measurement target surface through changes in storage capacity according to the volume of water; A second database securing step of securing a second database for rainfall information matching the dielectric constant data by matching the dielectric constant data secured in the dielectric constant data securing step with the rainfall measured in the rainfall actual measurement step, the electric field on the measurement target surface during rainfall A dielectric constant data measurement step of applying and securing data on the volume of water distributed on the measurement target surface through changes in storage capacity according to the volume of water, and the second database based on the dielectric constant data secured in the dielectric constant data actual measurement step. It further includes a second rainfall prediction step of predicting the rainfall by selecting the matching second rainfall from the second database secured in the securing step, and a rainfall verification step of verifying the rainfall by comparing the first rainfall and the second rainfall. can do.

In addition, in the rainfall measurement step of actually measuring the amount of rainfall for rain, for rain falling under the same conditions as the rainfall actual measurement step, an electric field is applied to the measurement target surface, and the electric field is distributed on the measurement target surface through the change in storage capacity according to the volume of water. A dielectric constant data securing step of securing data on the volume of water, matching the dielectric constant data secured in the dielectric constant data securing step with the rainfall measured in the rainfall actual measurement step to secure a third database for rainfall information matching the dielectric constant data. Third database securing step, dielectric constant data measurement step of applying an electric field to the measurement target surface during rainfall and securing data on the volume of water distributed on the measurement target surface through changes in storage capacity according to the volume of water, dielectric constant data actual measurement It may include a third rainfall prediction step of predicting rainfall by selecting a matching third rainfall from the third database secured in the third database securing step based on the permittivity data secured in the step.

An optical data securing step of securing data on the surface area where the rain is located on the measurement target surface by irradiating infrared rays to the measurement target surface for rain falling under the same conditions as the rainfall actual measurement step, and the optical data secured in the optical data securing step. The fourth database securing step of securing a fourth database for rainfall information matching the optical data by matching the data with the rainfall measured in the rainfall actual measurement step, the measurement target for rain falling by irradiating infrared rays to the measurement target surface during rainfall. An optical data measurement step of securing optical data on the surface area of raindrops located on a surface, and the fourth rainfall amount matched from the fourth database secured in the fourth database securing step based on the optical data secured in the optical data measurement step. It may include a fourth rainfall prediction step of predicting rainfall by selecting .

It further includes a second monitoring step of monitoring whether the rate of change of the third rainfall measured in the third rainfall prediction step is within a set range, and for rain falling under the same conditions as the actual rainfall measurement step, infrared rays are sent to the measurement target surface. An optical data securing step of securing data on the surface area located on the rain measurement target surface by investigating, and matching the optical data secured in the optical data securing step with the rainfall measured in the rainfall actual measurement step to match the optical data. A fourth database securing step for securing a fourth database for information, an optical data measurement step for securing optical data on the surface area of raindrops located on the measurement target surface for rain by irradiating infrared rays to the measurement target surface during rainfall, and It may include a fourth rainfall prediction step of predicting the rainfall amount by selecting a matching fourth rainfall amount from the fourth database secured in the fourth database securing step based on the optical data secured in the optical data actual measurement step.

Rainfall measurement step of actually measuring the amount of rainfall for rain, irradiating infrared rays to the measurement target surface for rain falling under the same conditions as the rainfall actual measurement step, securing optical data to secure data on the surface area where the rain is located on the measurement target surface. Step, a fifth database securing step of securing a fifth database for rainfall information matching the optical data by matching the optical data secured in the optical data securing step with the rainfall measured in the rainfall actual measurement step, measurement target surface in case of rainfall An optical data measurement step of securing optical data on the surface area of raindrops located on the measurement target surface for rain by irradiating infrared rays, and in the first database securing step based on the optical data secured in the optical data measurement step. It may include a fifth rainfall prediction step of predicting the fifth rainfall by selecting the matching first rainfall from the secured first database.

A hybrid rain sensor capable of measuring rainfall and a rainfall measurement method using the same according to an embodiment of the present invention have the following effects.

First, it is possible to provide a rainfall measurement device capable of measuring two types of rainfall in a simpler form by reflecting the morphological characteristics of optical and dielectric type rainfall measurement devices.

Second, it has the advantage of being able to measure the amount of rainwater over a larger area by driving an optical method and having a plurality of dielectric constant methods, thereby securing more accurate rainfall information.

Third, if it is attached to the front of the vehicle, data on the amount of rainfall linked to the vehicle's operation information can be secured in real time, and if information is collected through multiple vehicles, information on the amount of rainfall in a specific area during rainfall can be obtained. It has the advantage of being possible to secure.

Fourth, the rainfall amount can be predicted in different ways for raindrops forming on the measurement target surface, and there is an advantage in that it is possible to correct or verify errors in the predicted rainfall amount that may occur depending on the characteristics of the rainfall.

The effects of the present invention are not limited to the effects described above, and effects not mentioned can be clearly understood by those skilled in the art from this specification and the attached drawings.

Figure 1 is a diagram showing a hybrid rain sensor capable of measuring rainfall according to an embodiment of the present invention attached to a windshield;
Figure 2 is a view showing a state in which the rear cover of a hybrid rain sensor capable of measuring rainfall according to an embodiment of the present invention is removed;
Figure 3 is a view showing the front of Figure 2;
Figure 4 is a diagram showing a state in which the movement module of a hybrid rain sensor capable of measuring rainfall according to an embodiment of the present invention is moved downward;
Figure 5 is a diagram illustrating the path along which infrared rays irradiated from the optical rainfall measurement module of the hybrid rain sensor capable of measuring rainfall according to an embodiment of the present invention travel;
Figure 6 is a diagram for explaining the area measured by infrared rays emitted from the optical rainfall measurement module of the hybrid rain sensor capable of measuring rainfall according to an embodiment of the present invention;
Figure 7 is a diagram showing a circuit diagram of a dielectric constant rainfall measurement module of a hybrid rain sensor capable of measuring rainfall according to an embodiment of the present invention;
Figure 8 is a diagram schematically illustrating the amount of water droplets measured by a hybrid rain sensor capable of measuring rainfall according to an embodiment of the present invention;
Figure 9 is a diagram schematically explaining the shape of raindrops on a glass window;
Figure 10 is a diagram schematically showing the cross-sectional area formed by raindrops on the measurement target area in the optical data securing step in the first embodiment of the rainfall prediction method of the present invention;
Figure 11 is a diagram schematically showing the shape formed on the side of a raindrop in the step of securing dielectric constant data in the first embodiment of the rainfall prediction method of the present invention;
Figure 12 is a diagram for explaining the actual rainfall amount for water droplets forming on the measurement target area in Figures 11 and 12;
Figure 13 is a flowchart showing the sequence of the first embodiment of the rainfall prediction method of the present invention;
Figure 14 is a flowchart showing the procedure of the second embodiment of the rainfall prediction method of the present invention;
Figure 15 is a flowchart showing the sequence of the third embodiment of the rainfall prediction method of the present invention;
Figure 16 is a flowchart showing the procedure of the fourth embodiment of the rainfall prediction method of the present invention;

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the spirit of the present invention is not limited to the presented embodiments, and those skilled in the art who understand the spirit of the present invention may add, change, or delete other components within the scope of the same spirit, or create other degenerative inventions or this invention. Other embodiments that are included within the scope of the invention can be easily proposed, but this will also be said to be included within the scope of the invention of the present application.

Figure 1 is a diagram showing a state in which a hybrid rain sensor capable of measuring rainfall according to an embodiment of the present invention is attached to a windshield, and Figure 2 is a state in which the rear cover of the hybrid rain sensor capable of measuring rainfall according to an embodiment of the present invention is removed. is a view showing, Figure 3 is a view showing the front of Figure 2, and Figure 4 is a view showing a state in which the movement module of the hybrid rain sensor capable of measuring rainfall in an embodiment of the present invention is moved downward.

Referring to Figures 1 to 4, the hybrid rain sensor capable of measuring rainfall according to an embodiment of the present invention includes an optical rainfall measurement module 100, a dielectric constant rainfall measurement module 200, and an optical waveguide 300.

When irradiating infrared rays to the surface of a glass window (G), the optical rainfall measurement module 100 uses the fact that the refractive index of the window is approximately 1.5, the refractive index of water droplets is 1.33, and the refractive index of air is 1, so that the infrared rays radiated to the window (G) This method uses the principle that light enters the water droplets when irradiated on the area where the water droplets are, and is reflected when irradiated on the glass window. That is, the amount of water on the surface of the window G is measured through changes in the amount of light received by the light receiving element 102, and the amount of precipitation is predicted based on this.

Meanwhile, the calculation method for predicting rainfall using the optical rainfall measurement module 100 of this embodiment is to predict the amount of infrared rays emitted from the light emitting element 101 and recovered from the light receiving element 102. The calculation method will be applied.

The optical rainfall measurement module 100 of the present invention includes a light emitting element 110, a light receiving element 120, a movement guide 130, and a movement module 140.

The light emitting element 110 emits infrared rays, and the light receiving element 120 receives infrared rays emitted from the light emitting element 110 and passing through the optical waveguide 300, which will be described later. And the amount of water droplets on the surface of the glass window (G) is determined based on the change in the amount of light received by the light receiving element 120.

The movement guide 130 is formed to be long in the up and down directions, and serves as a guide for moving the movement module 140, which will be described later, in the up and down directions. Meanwhile, the movement guide 130 in this embodiment is made of a cylindrical permanent magnet, and the movement module 140, which will be described later, is provided with a solenoid coil (), so the movement module ( 140) is formed to move in the up and down directions.

The moving module 140 has a light-emitting element 110 and a light-receiving element 120 coupled to both ends in the vertical direction, and moves in the vertical direction along the moving guide 130 to cover the glass window (G) with a larger area of water droplets. The amount is detected. Therefore, it is possible to secure more accurate data in measuring rainfall based on measured water droplets.

Specifically, the movement module 140 in this embodiment includes a coupling part 141, a light emitting device fixing part 142, and a light receiving device fixing part 143.

The coupling portion 141 is coupled to the movement guide 130 so that it can move in the up and down directions. There is no limit to the shape of the coupling portion 141, but in this embodiment, the movement guide 130 is made of a cylindrical permanent magnet, so it is formed in a shape with a hole inserted into the cylinder, and a solenoid coil 141a is formed around the circumference. It gets cold. Therefore, it moves in the up and down directions according to the application of current, and there is no need to provide a separate drive motor, etc., making the overall product compact in size.

The light emitting device fixing portion 142 is formed at one end of the coupling portion 141 by bending the rear end in the upward and downward directions, and the light emitting device 110 is fixed thereto. The light-receiving element fixing part 143 is formed at one end of the coupling part 141 by bending the rear end in the upward and downward directions, and the light-receiving element 120 is fixed thereto. That is, the light emitting element 110 radiates infrared rays in the outer direction of the coupling part 141, and the light receiving element 120 receives infrared rays flowing in from the outer direction of the coupling part 141, thereby forming the optical waveguide 300. It is possible to form a long path for infrared rays to travel inside.

The optical waveguide 300 functions to guide infrared rays emitted from the light emitting device 110 to be incident on the glass window G at an angle of 45 degrees. Therefore, as the refractive index of the glass window is 1.5, the refractive index of air is 1, and the refractive index of water droplets is 1.33, infrared rays entering the window (G) enter the water droplets in the area where there is water and radiate outward, and in the area where there are no water droplets, the infrared rays enter the glass window (G) and radiate to the outside. Total reflection is performed.

Specifically, in this embodiment, a recessed hole 300a is formed in the front of the optical waveguide 300, and both sides of the front are in contact with the glass window G. Accordingly, an air layer is formed between the recessed groove 300a and the back of the glass window (G), and thus, as shown in Figure 4, infrared rays are able to be totally reflected between the front and back of the glass window (G). Meanwhile, a dielectric constant rainfall measurement module 200, which will be described later, is coupled to the recessed groove 300a.

A first inclined surface 301 is formed on a portion of the optical waveguide 300 that faces the rear light emitting device 110, and a second inclined surface 302 is formed on a portion that faces the light receiving device 120.

As described above, the light-emitting device fixing part 142 and the light-receiving device fixing part 143 are formed to be bent backward at the coupling part 141, so that the first inclined surface 301 is a light emitting device fixed to the light-emitting device fixing part 142. Infrared rays emitted from the device 110 are formed to enter the first inclined surface 301 in a vertical direction. And the second inclined surface 301 will be formed so that infrared rays flowing into the light receiving element 120 enter the light receiving element 120 without scattering.

Figure 5 is a diagram for explaining the path along which infrared rays irradiated from the optical rainfall measurement module of the hybrid rain sensor capable of measuring rainfall according to an embodiment of the present invention move, and Figure 6 is a diagram for explaining the path along which infrared rays move, capable of measuring rainfall according to an embodiment of the present invention. This is a diagram to explain the area measured by infrared rays emitted from the optical rainfall measurement module of the rain sensor.

Referring to Figures 5 and 6, the movement process of infrared rays in the optical rainfall measurement module of the present invention will be described.

Infrared rays emitted from the light emitting device 110 flow into the first inclined surface 301 of the optical waveguide 300. As described above, the light-emitting device fixing portion 142 is bent and formed to be inclined to the coupling portion 141, and the first inclined surface 301 is formed so that infrared rays irradiated from the light-emitting device 110 enter the optical waveguide from the vertical direction. It is also formed inclinedly.

Infrared rays entering the optical waveguide 300 are reflected from the side of the optical waveguide and enter the glass window G at an angle of 45 degrees for total reflection.

Meanwhile, in the present invention, the light emitting device fixing part 142 and the first inclined surface 301 are formed to be inclined, and a structure is adopted in which the light is reflected from the side of the optical waveguide 300 and enters the glass window (G), thereby reducing the size of the overall product. You can take it compactly. Specifically, in order to secure the total reflection movement path of infrared rays in the glass window (G) as shown in Figure 4, a light-emitting device must be placed at the end of the optical waveguide, but in the present invention, the first inclined surface 301 is utilized to provide a light-emitting device (110). ) is provided inside the optical waveguide 300, making it possible to reduce the size of the product.

Infrared rays entering the inside of the glass window (G) are totally reflected between the front and back of the window, and if there are water droplets on the front of the window, infrared rays will flow into the water droplet according to Snell's law. Therefore, the amount of infrared rays recovered by the light receiving element 120 varies depending on the number of water droplets on the surface of the window G.

Through this, in the present invention, the area with water droplets is first calculated from the entire surface area of the window, and the amount of rainfall is secondarily estimated based on this.

Meanwhile, as shown in Figure 6, while the surface S on which infrared rays are irradiated is limited, the water droplets located on the surface of the window are arranged irregularly. In other words, there is a possibility of error when measuring rainfall with water droplets located only on the infrared irradiated surface (S) of the entire area. Therefore, in the present invention, the moving module 130, in which the light-emitting device 110 and the light-receiving device 120 are combined, is moved in the up and down directions and the amount of water droplets is measured over a wider area to reduce the above-described error. do.

Figure 7 is a diagram showing a circuit diagram of a rainfall measurement module in the dielectric constant method of a hybrid rain sensor capable of measuring rainfall in an embodiment of the present invention, and Figure 8 is a diagram showing a dielectric constant method of a hybrid rain sensor capable of measuring rainfall in an embodiment of the present invention. This is a diagram to schematically explain how the amount of water droplets is measured.

Referring to Figures 7 and 8, the dielectric constant rainfall measurement module 200 uses the fact that the dielectric upper part of water is very high to apply a high frequency signal to change the capacitance in response to the change in dielectric constant of the capacitor to change the oscillation frequency or impedance. A known method of detecting and measuring rainfall is used.

In other words, the amount of rainfall is calculated by measuring the amount of water located in the measurement target area and estimating the amount of rainfall based on this. However, this method has the disadvantage that the reliability of the data is low when the amount of rainfall is small.

Therefore, the present invention has the advantage of being able to accurately determine the amount of water located in a specific area using two methods, the optical method and the dielectric constant method, and ultimately secure accurate information about the amount of rainfall.

In the dielectric constant rainfall measurement module 200, two plate-shaped electrodes 201 and 202 cross each other like comb teeth, and when a voltage is applied to the two electrodes, an electric field is applied between the two electrodes as shown in Figure 7, and an electric field is applied to the outside of the window. When there are water droplets, the electric field outside the window increases because the dielectric constant of water is higher than that of vacuum or glass. This increase in storage capacity is related to the total volume of the water droplet, and various known calculation methods may be used as a specific calculation method.

Specifically, in this embodiment, a circuit as shown in FIG. 7 in which the resistance 203 is applied is configured, and the amount of attached water droplets is calculated by repeating charging and discharging using a known calculation method.

Meanwhile, the dielectric constant rainfall measurement module 200 of the present invention is provided in the form of a module with the above circuit built in, and a plurality of units may be provided in the groove 300a on the front of the optical waveguide 300 in the vertical direction.

As described above, a groove must be formed on the front of the optical waveguide 300 for total reflection of infrared rays in the glass window G, and in the present invention, the dielectric constant rainfall measurement module 200 is positioned using the groove. Depending on the order, the size of the entire product can be made compact.

Meanwhile, in this embodiment, the movement module 140 moves in the up and down directions along the movement guide 130 made of a permanent magnet by applying a current to the solenoid coil 140a. Therefore, the measurement of the amount of water droplets based on dielectric constant in the corresponding area may be inaccurate due to the electric field generated by the current applied to the solenoid coil during the movement process.

Therefore, in the present invention, when the dielectric constant type rainfall measurement module 200 is arranged in the upper and lower directions, and the moving module 140 is located at the top, the volume of water droplets is measured through the dielectric constant type rainfall measurement module 200 at the bottom. Measurements are made, and when the mobile module 140 is located at the bottom, data is secured from the dielectric constant rainfall measurement module 200 at the top.

Therefore, more accurate measurement of rainfall will be possible.

Figure 9 is a diagram schematically illustrating the relationship between the shape of raindrops on a window and the amount of rainfall, and Figure 10 is a cross-sectional area formed by raindrops on the measurement target area in the optical data acquisition step in the first embodiment of the rainfall prediction method of the present invention. is a diagram schematically showing, Figure 11 is a diagram schematically showing the shape formed on the side of a raindrop in the step of securing dielectric constant data in the first embodiment of the rainfall prediction method of the present invention, and Figure 12 is a diagram schematically showing the shape formed on the side of the raindrop. Figure 12 is a diagram for explaining the actual rainfall amount for water droplets forming on the measurement target area, and Figure 13 is a flowchart showing the procedure of the first embodiment of the rainfall prediction method of the present invention.

Referring to FIGS. 9 to 13, the rainfall measurement method of the present invention measures the cross-sectional area or volume of raindrops forming on the measurement target area (A) formed on a window, etc., and predicts the rainfall through this.

Rainfall is information on the amount of rain falling per specific hour and is provided in mm units. And generally, people get information about the current raining situation through information on hourly rainfall provided by the Korea Meteorological Administration.

Therefore, in the present invention, a database that can predict rainfall is secured by measuring the cross-sectional area or volume of raindrops that form on windows, etc. when it rains, and matching it with information on hourly rainfall provided by the Korea Meteorological Administration.

In addition, when it actually rains, the same type of information as the information on rainfall provided by the Korea Meteorological Administration can be provided through the actual measured data on the cross-sectional area occupied by raindrops on the measurement target surface formed on the window.

In particular, when the rain sensor of the present invention is mounted on the windshield of a moving vehicle and the corresponding information can be collected, it is possible to secure data on the amount of rainfall along the movement path of any one vehicle. Furthermore, when multiple vehicles are equipped with the rain sensor of the present invention, it is possible to secure data on regional precipitation according to the operation information and operation information of multiple vehicles, and through processing the data, more accurate information on regional precipitation, etc. It will be possible to secure information.

Specifically, the rainfall prediction method of this embodiment includes a rainfall actual measurement step (S10), an optical data securing step (S20), a first database securing step (S30), an optical data actual measurement step (S40), and a first rainfall prediction step (S50). Includes.

In the actual rainfall measurement step (S10), the rainfall for rainy situations is measured. There are no restrictions on the rainfall measurement method, but the rainfall measurement method provided by the Korea Meteorological Administration, which is generally well known to the public, may be used.

In the optical data acquisition step (S20), infrared rays are irradiated to the measurement target surface (A) for rain falling under the same conditions as the rainfall actual measurement step, and data on the surface area where the rain is located on the measurement target surface (A) is secured.

In the first database securing step (S30), the optical data secured in the optical data securing step (S20) is matched with the rainfall measured in the rainfall actual measurement step (S10) to secure a first database for rainfall information matching the optical data. do.

Specifically, referring to Figure 9, the shape of raindrops during rainfall may vary, and the amount may also be variable. For example, as shown in Figure 9, the information on the shape of raindrops and the amount of precipitation is roughly divided into a low precipitation area (a), a medium precipitation area (b), and a high precipitation area (c).

In the case of Figures 9 (a), (b), and (c), the shape distributed on the entire surface of the measurement object (A), such as a glass window, is schematically expressed as shown in Figure 10. That is, in the optical data securing step (S20), data on the surface area occupied by raindrops present on the measurement target surface (A) in FIG. 10 are measured by irradiating infrared rays to secure optical data. That is, for example, in the case of (a), data about the surface area occupied by the measured raindrop on the measurement target surface (A) is a1, and in the case of (b), data about the surface area occupied by the measured raindrop on the measurement target surface (A) are provided. In the case of b1 and (c), data on the surface area that the measured raindrop occupies on the measurement target surface (A) is described as c1.

In the case of Figures 9 (a), (b), and (c), the actual hourly precipitation measured by the Korea Meteorological Administration is schematically expressed as shown in Figure 12. That is, for example, in the case of (a), the measured precipitation is a2, in (b) the measured precipitation is b2, and in (c) the measured precipitation is c2.

That is, in a rainy situation under the same conditions (i.e., (a), (b), and (c) in Figure 9), the values of the rainfall measured in the actual rainfall measurement step (S10) are a2, b2, and c2, and the optical data The data values for the surface area measured in the securing step (S20) are a1, b1, and c1.

And in the first database securing step (S30), rainfall and optical data under the same conditions are matched. That is, in this embodiment, rainfall and optical data were matched for three conditions as shown in Figure 9, but it will be possible to secure a wider range of data for various amounts and types of rainfall.

In the optical data measurement step (S40), optical data on the surface area of raindrops located on the measurement target surface for rain is obtained by irradiating infrared rays to the measurement target surface during rainfall. And in the first rainfall prediction step (S50), the rainfall amount matching the optical data secured in the first database secured in the first database securing step (S40) is calculated based on the optical data secured in the optical data actual measurement step (S40). The value is found and predicted as the first rainfall amount.

Specifically, in the case of (a), (b), and (c) of Figure 9, if the optical data secured in the optical data measurement step (S40) is b1, in this case, the first rainfall amount is predicted as b2. do.

That is, by securing optical data on the measurement target surface under various conditions, it is possible to secure information about the amount of rainfall for the corresponding conditions in the first database.

Meanwhile, in the case of the optical method, the area occupied by water droplets on the surface of a specific area is measured, so even if the area is the same, the amount of water varies depending on the characteristics of the rain. In particular, when a water film is formed on the surface of the window depending on the nature or amount of rain, it is difficult to measure accurate data because all infrared rays entering the window escape.

Therefore, there may be a difference in the value of the first rainfall derived from the first database through actual optical data, and in this embodiment, information about the first rainfall is provided through the dielectric constant rainfall measurement module 200. It further includes a step of verifying accuracy.

Specifically, the rainfall prediction method in this embodiment includes a dielectric constant data securing step (S70), a second database securing step (S80), a dielectric constant data measurement step (S90), a second rainfall prediction step (S100), and a rainfall verification step (S110). ) and a third rainfall prediction step (S120).

In the dielectric constant data acquisition step (S70), electricity is applied to the measurement target surface (A) for rain falling under the same conditions as the rainfall actual measurement step (S10), and is distributed to the measurement target surface through changes in storage capacity according to the volume of water. Obtain data on the volume of water flowing.

In the second database securing step (S80), the dielectric constant data secured in the dielectric constant data securing step (S70) is matched with the rainfall measured in the rainfall actual measurement step (S10) to create a second database for rainfall information matching the dielectric constant data. Secure.

In the dielectric constant data measurement step (S90), an electric field is applied to the measurement target surface during rainfall, and data on the volume of water distributed on the measurement target surface is secured through changes in storage capacity according to the volume of water.

And in the second rainfall prediction step (S100), the rainfall is predicted by selecting the matching second rainfall from the second database secured in the second database securing step (S80) based on the dielectric constant data secured in the dielectric constant data actual measurement step. .

Referring to FIG. 12, in the case of (a), (b), and (c) of FIG. 9, the shape distributed on the entire surface (A) of the measurement object such as a glass window is schematically expressed from the side. same. That is, in the dielectric constant data securing step (S70), data on the volume occupied by raindrops existing on the measurement target surface (A) in FIG. 12 are measured by applying an electric field to secure dielectric constant data. That is, for example, in the case of (a), data on the volume occupied by the measured raindrop on the measurement target surface (A) is a3, and in (b), data on the volume occupied by the measured raindrop on the measurement target surface (A) are provided. In the case of b3 and (c), the data on the volume that the measured raindrop occupies on the measurement target surface (A) is explained by using c3.

That is, as described above, in Figure 9 (a), (b), and (c)), the values of the rainfall measured in the actual rainfall measurement step (S10) are a2, b2, and c2, and the dielectric constant data securing step (S70) The data values for the surface area measured in are a3, b3, and c3.

And in the second database securing step (S80), rainfall and dielectric constant data under the same conditions are matched. That is, in this embodiment, rainfall and dielectric constant data were matched for three conditions as shown in Figure 9, but it will be possible to secure a wider range of data for various amounts and types of rainfall.

In the dielectric constant data measurement step (S90), an electric field is applied to the measurement target surface during rainfall to secure optical data on the volume of raindrops located on the measurement target surface. And in the second rainfall prediction step (S100), based on the dielectric constant data secured in the dielectric constant data actual measurement step (S90), the rainfall matching the dielectric constant data secured in the second database secured in the second database securing step (S80) is calculated. The value for this is found and predicted as the second rainfall amount.

Specifically, in the case of (a), (b), and (c) of Figure 9, if the optical data secured in the dielectric constant data measurement step (S90) is b3, in this case, the second rainfall is predicted as b2. do.

In other words, by securing dielectric constant data on the measurement target surface under various conditions, it is possible to secure information about the amount of rainfall for the corresponding conditions in the second database.

The rainfall prediction method of this embodiment verifies the first rainfall by comparing the first rainfall through optical data obtained through the above process with the second rainfall through dielectric constant data.

That is, as described above, the first rainfall in this embodiment is not the actual measured rainfall (for example, the rainfall measured according to the general measurement method as shown in Figure 9), but the raindrops present on the measurement target surface. Rainfall is predicted through the surface area (e.g., the surface area of raindrops present on a specific surface of a vehicle's windshield as described above), and errors may occur depending on circumstances such as the type of rain.

Therefore, in this embodiment, the accuracy of the rainfall predicted through optical data is verified through comparison with the rainfall predicted through dielectric constant data.

Specifically, the rainfall verification step (S110) in this embodiment verifies the rainfall by comparing the first rainfall predicted through the optical data and the second rainfall predicted through dielectric constant data. That is, in this embodiment, if the difference between the second rainfall amount and the first rainfall amount is within a preset range, it is verified that the first rainfall amount is accurate.

However, if the difference between the first and second rainfall values is outside the preset range, the accuracy of the first and second rainfall amounts cannot be verified because it is not a method of directly measuring rainfall.

In this case, in the third rainfall prediction step (S130), the intermediate value between the first rainfall and the second rainfall is predicted as the third rainfall.

For example, in the example described above, if the first rainfall predicted through optical data is predicted as a2 and the second rainfall predicted through dielectric constant data is predicted as c2, the intermediate value of the two is predicted as the third rainfall. I do it.

That is, in this embodiment, the amount of rainfall is predicted through the surface area of raindrops present on the measurement target surface during rainfall, and the measured rainfall amount is verified and corrected through the volume of raindrops present on the measurement target surface. Therefore, it is possible to measure the amount of rainfall in a different way from the existing method. In particular, when measuring with a device attached to the rain sensor of a vehicle, the amount of rainfall in a specific area or on a specific route can be measured in conjunction with the driving position of a certain vehicle. It becomes possible to secure data.

Figure 14 is a diagram showing the sequence of the second embodiment of the rainfall prediction method of the present invention.

Since the rainfall prediction method of this embodiment is overall similar to the first embodiment described above, the description will focus on the differences below.

Unlike general rainfall measurement methods, rainfall is predicted from raindrops forming on the measurement target surface (for example, a vehicle window). Therefore, depending on the shape of the raindrops or the driving speed of the vehicle, the shape of the raindrops on the surface to be measured may vary, resulting in errors.

Therefore, in the first embodiment, the accuracy of the predicted rainfall is verified by comparing the rainfall through optical data on the surface area with the rainfall through dielectric constant data, whereas in the present embodiment, changes in the measured first rainfall are monitored. This verifies the accuracy of rainfall.

Specifically, the rainfall actual measurement step (S210), the optical data securing step (S220), the first database securing step (S230), the optical data actual measurement step (S240), and the first rainfall prediction step (S250) of this embodiment are the first implementation. Same as example.

The first monitoring step (S260) monitors whether the change rate of the first rainfall predicted in the first rainfall prediction step (S250) is within a set range.

Generally, during rainfall, changes in rainfall occur within a certain range. Therefore, if the change in predicted rainfall is within the set range, the accuracy of the predicted first rainfall is judged to be high.

However, if it is outside the set range, it is determined that the accuracy is low, and the first rainfall amount is corrected based on the dielectric constant data as in the first embodiment.

That is, in this embodiment, according to the judgment result of the first monitoring step (S260), the dielectric constant data securing step (S270), the second database securing step (S280), the dielectric constant data actual measurement step (S90), and the second rainfall prediction step (S300). This is performed, and since it is the same as the first embodiment, the description below is omitted.

In conclusion, in this embodiment, when it is determined that the first rainfall based on optical data is inaccurate, the second rainfall based on dielectric constant data is determined as the predicted rainfall.

Figure 15 is a diagram showing the sequence of the third embodiment of the rainfall prediction method of the present invention.

Referring to Figure 15, in this embodiment, individual steps performed in the first embodiment are the same, but there is a difference in order. In the first embodiment, the first rainfall predicted through optical data is verified with the second rainfall predicted through dielectric constant data.

However, in this embodiment, the tertiary precipitation is first predicted using dielectric constant data, and if the change rate of the tertiary precipitation is outside a specific range, it is verified with the 4th precipitation through optical data.

In other words, the accuracy of predictions using optical data and dielectric constant data varies depending on the amount of rainfall, type of rainfall, vehicle operating conditions, etc. And in the case of rainfall, it may come from a small amount to a lot, or it may come from a lot and then decrease, so in this embodiment, the rainfall amount is predicted in the opposite order to the first embodiment.

Specifically, the rainfall prediction method in this embodiment includes a rainfall measurement step (S410), a dielectric constant data securing step (S420), a third database securing step (S430), a dielectric constant data measurement step (S440), and a third rainfall prediction step (S450). ), optical data securing step (S460), 4th database securing step (S470), optical data actual measurement step (S480), 4th rainfall prediction step (S490), rainfall verification step (S500), and 5th rainfall prediction step (S510) ) includes.

Since each individual step is the same as the first and second embodiments, the description below will be omitted.

Figure 16 is a diagram showing the sequence of the fourth embodiment of the rainfall prediction method of the present invention.

Referring to Figure 16, in this embodiment, the change rate of the predicted rainfall is monitored and verified as in the second embodiment.

Specifically, the rainfall prediction method of this embodiment includes a rainfall measurement step (S610), a dielectric constant data securing step (S620), a third database securing step (S630), a dielectric constant data measurement step (S640), a third rainfall prediction step (S650), It includes the second monitoring step (S660), the optical data securing step (S670), the fourth database securing step (S680), the optical data actual measurement step (S690), and the fourth rainfall prediction step (S700).

Since each step of this embodiment is also the same as the above embodiment, the description below will be omitted.

In other words, according to the rainfall prediction method of the present invention, rather than the commonly known rainfall measurement method, the measurement target surface is set and the rainfall is indirectly predicted through the characteristics of raindrops forming on the measurement target surface during rainfall.

Therefore, when a rain sensor capable of simultaneous optical and dielectric constant measurement is placed on the front of a vehicle as described above, there is an advantage in that it is possible to secure data on the amount of rainfall in conjunction with the vehicle's driving path.

Furthermore, in this embodiment, considering the accuracy of measurement according to the type of rainfall of optical data and dielectric constant data, the accuracy of the predicted rainfall amount can be increased by verifying the other predicted rainfall amount through one predicted rainfall amount. It becomes possible.

In the above, the configuration and features of the present invention have been described based on the embodiments according to the present invention, but the present invention is not limited thereto, and various changes or modifications may be made within the spirit and scope of the present invention. It is obvious to those skilled in the art, and therefore, it is stated that such changes or modifications fall within the scope of the appended patent claims.

100: Optical rainfall measurement module 110: Light-emitting device
120: light receiving element 130: movement guide
140: Mobile module 200: Dielectric constant rainfall measurement module
201: first electrode 202: second electrode
300: optical waveguide 301: first slope
302: Second slope

Claims (7)

A rainfall measurement step of actually measuring the amount of rainfall for rain;
An optical data securing step of securing data on the surface area where the rain is located on the measurement target surface by irradiating infrared rays to the measurement target surface for rain falling under the same conditions as the rainfall actual measurement step;
A first database securing step of securing a first database for rainfall information matching the optical data by matching the optical data secured in the optical data securing step with the rainfall measured in the rainfall actual measurement step;
An optical data measurement step of securing optical data on the surface area of raindrops located on the measurement target surface for rain by irradiating infrared rays to the measurement target surface during rainfall; and
A first rainfall prediction step of predicting rainfall by selecting a matching first rainfall amount from the first database secured in the first database securing step based on the optical data secured in the optical data actual measurement step;
Rainfall prediction method including. According to paragraph 1,
A dielectric constant data securing step of applying an electric field to the measurement target surface for rain falling under the same conditions as the rainfall actual measurement step and securing data on the volume of water distributed on the measurement target surface through changes in storage capacity according to the volume of water. ;
A second database securing step of securing a second database for rainfall information matching the dielectric constant data by matching the dielectric constant data secured in the dielectric constant data securing step with the rainfall measured in the rainfall actual measurement step;
A dielectric constant data measurement step of applying an electric field to the measurement target surface during rainfall and securing data on the volume of water distributed on the measurement target surface through changes in storage capacity according to the volume of water;
A second rainfall prediction step of predicting rainfall by selecting a matching second rainfall from the second database secured in the second database securing step based on the dielectric constant data secured in the dielectric constant data measurement step;
A rainfall verification step of verifying the rainfall amount by comparing the first rainfall amount and the second rainfall amount; and
A third rainfall prediction step of predicting the intermediate value of the first rainfall and the second rainfall as third rainfall when the difference between the values of the first rainfall and the second rainfall is outside a preset range;
A rainfall prediction method further comprising: According to paragraph 1,
It further includes a first monitoring step of monitoring whether the change rate of the first rainfall predicted in the first rainfall prediction step is within a set range,
If the rate of change of the first rainfall amount deviates from the set range in the first monitoring step, an electric field is applied to the measurement target surface for rain falling under the same conditions as the actual rainfall measurement step, and through a change in storage capacity according to the volume of water. A permittivity data securing step of securing data on the volume of water distributed on the measurement target surface;
A second database securing step of securing a second database for rainfall information matching the dielectric constant data by matching the dielectric constant data secured in the dielectric constant data securing step with the rainfall measured in the rainfall actual measurement step;
A dielectric constant data measurement step of applying an electric field to the measurement target surface during rainfall and securing data on the volume of water distributed on the measurement target surface through changes in storage capacity according to the volume of water;
A second rainfall prediction step of predicting rainfall by selecting a matching second rainfall from the second database secured in the second database securing step based on the dielectric constant data secured in the dielectric constant data measurement step;
A rainfall verification step of verifying the rainfall amount by comparing the first rainfall amount and the second rainfall amount;
A rainfall prediction method further comprising: A rainfall measurement step of actually measuring the amount of rainfall for rain;
A dielectric constant data securing step of applying an electric field to the measurement target surface for rain falling under the same conditions as the rainfall actual measurement step and securing data on the volume of water distributed on the measurement target surface through changes in storage capacity according to the volume of water. ;
A third database securing step of securing a third database for rainfall information matching the dielectric constant data by matching the dielectric constant data secured in the dielectric constant data securing step with the rainfall measured in the rainfall actual measurement step;
A dielectric constant data measurement step of applying an electric field to the measurement target surface during rainfall and securing data on the volume of water distributed on the measurement target surface through changes in storage capacity according to the volume of water;
A third rainfall prediction step of predicting rainfall by selecting a matching third rainfall from the third database secured in the third database securing step based on the dielectric constant data secured in the dielectric constant data actual measurement step;
Rainfall prediction method including. According to paragraph 4,
An optical data securing step of securing data on the surface area where the rain is located on the measurement target surface by irradiating infrared rays to the measurement target surface for rain falling under the same conditions as the rainfall actual measurement step;
A fourth database securing step of securing a fourth database for rainfall information matching the optical data by matching the optical data secured in the optical data securing step with the rainfall measured in the rainfall actual measurement step;
An optical data measurement step of securing optical data on the surface area of raindrops located on the measurement target surface for rain by irradiating infrared rays to the measurement target surface during rainfall; and
a fourth rainfall prediction step of predicting rainfall by selecting a matching fourth rainfall from the fourth database secured in the fourth database securing step based on the optical data secured in the optical data actual measurement step;
Rainfall prediction method including. According to paragraph 4,
Further comprising a second monitoring step of monitoring whether the change rate of the third rainfall measured in the third rainfall prediction step is within a set range,
An optical data securing step of securing data on the surface area where the rain is located on the measurement target surface by irradiating infrared rays to the measurement target surface for rain falling under the same conditions as the rainfall actual measurement step;
A fourth database securing step of securing a fourth database for rainfall information matching the optical data by matching the optical data secured in the optical data securing step with the rainfall measured in the rainfall actual measurement step;
An optical data measurement step of securing optical data on the surface area of raindrops located on the measurement target surface for rain by irradiating infrared rays to the measurement target surface during rainfall; and
a fourth rainfall prediction step of predicting rainfall by selecting a matching fourth rainfall from the fourth database secured in the fourth database securing step based on the optical data secured in the optical data actual measurement step;
Rainfall prediction method including. A rainfall measurement step of actually measuring the amount of rainfall for rain;
An optical data securing step of securing data on the surface area where the rain is located on the measurement target surface by irradiating infrared rays to the measurement target surface for rain falling under the same conditions as the rainfall actual measurement step;
A fifth database securing step of securing a fifth database for rainfall information matching the optical data by matching the optical data secured in the optical data securing step with the rainfall measured in the rainfall actual measurement step;
An optical data measurement step of securing optical data on the surface area of raindrops located on the measurement target surface for rain by irradiating infrared rays to the measurement target surface during rainfall;
A fifth rainfall prediction step of predicting a fifth rainfall amount by selecting a matching first rainfall amount from the first database secured in the first database securing step based on the optical data secured in the optical data measurement step;
Rainfall prediction method including.