KR102019337B1 - System and method for measuring visibility - Google Patents

Abstract

Disclosed are a system for measuring a visibility distance and a method thereof. According to one embodiment of the present invention, the system for measuring a visibility distance comprises: a transmitter transmitting a laser signal including identification information of the transmitter and information on a transmission angle while changing the transmission angle; and a receiver receiving the laser signal and estimating at least one of weather information and traffic volume information based on the identification information of the transmitter and the information on the transmission angle included in the received laser signal.

Description

Visibility distance measuring system and method {SYSTEM AND METHOD FOR MEASURING VISIBILITY}

The disclosed embodiments relate to techniques for measuring the visibility distance that is made.

Radar or lidar sensors, which are used in autonomous vehicle systems, are excellent in detecting obstacles around the vehicle, but are less accurate in detecting obstacles in bad weather conditions. Therefore, autonomous vehicles using radars or riders are difficult to perform functions for safe driving such as decelerating vehicle speeds and securing inter-vehicle distances due to bad weather. In this regard, for the sake of safety in Korea, the measurement of visibility distances must be carried out on highways, railways, bridges, and airfields in the mountains and near rivers. The market size related to the visibility distance measuring technology forms about 40 billion annually. Specifically, Sweden has the best visibility distance measurement technology, and the United States, Germany and Japan also have their own technologies. In contrast, there is no development of bistatic visibility system for domestic visibility distance measurement, and some companies import and systemize parts, but there is no visibility system developed by domestic technology alone. Therefore, due to the lack of domestic technology, overseas products are supplied at a high price, and the product price of the marine precision visibility system is generating high added value that is close to several hundred million won.

On the other hand, a visibility system consisting of a set of transceivers should be secured by the maximum measurement distance in order to measure the visibility distance, so it is impossible to measure the visibility distance when there is a curved section or an obstacle. For example, a visibility system that can measure up to 10 km can be operated in an environment where a wide field of view is secured so that there are no other obstacles within 10 km. Therefore, in a mountainous or valley region where there is a lot of bad weather and the weather is rapidly changing, the visibility distance measurement is impossible because it is not an environment capable of operating the visibility system. Unlike in daily life, when driving a car, a real-time visibility distance or weather information of a mountain or a valley is very important. Therefore, a visibility system that operates smoothly in a mountain or a valley is required.

Korean Patent Publication No. 10-2018-0093717 (published Aug. 22, 2018)

Disclosed embodiments are to provide a visibility distance measuring system and method.

According to one or more exemplary embodiments, a visibility distance measuring system includes: a transmitter configured to transmit a laser signal including identification information of the transmitter and information on the transmission angle while changing a transmission angle; And a receiver that receives the laser signal and estimates at least one of weather information and traffic volume information based on identification information of the transmitter and information on a transmission angle included in the received laser signal.

The transmitter may rotate at a preset rotation speed to change the delivery angle.

The laser signal may further include a transmission time of the laser signal.

The receiver may measure a reception time of the laser signal when the laser signal is received, and calculate a moving distance of the laser signal based on a transmission time and a reception time of the laser signal.

The receiver may store information associated with each of a plurality of transmitters including the transmitter.

The information related to each of the plurality of transmitters includes identification information of each of the plurality of transmitters, and the receiver is included in the identification information and the received laser signal of each of the plurality of transmitters when the laser signal is received. The transmitter that has transmitted the received laser signal may be identified based on the identification information of the transmitter.

The information related to each of the plurality of transmitters further includes a transmission angle that can be received from each of the plurality of transmitters and a distance to each of the plurality of transmitters, and the receiver includes a transmission angle that can be received from the identified transmitter and the reception. The climate information is based on the intensity of the received laser signal when the difference between the transmission angles included in the received laser signal and the difference between the distance from the identified transmitter and the calculated moving distance are within a preset value. It can be estimated.

The information associated with each of the plurality of transmitters further includes a laser signal intensity set in each of the plurality of transmitters, and the receiver further comprises the calculated travel distance, the intensity of the received laser signal and the laser set in the identified transmitter. The attenuation coefficient for the received laser signal may be calculated based on the signal strength, and the climate information may be estimated based on the calculated attenuation coefficient.

The attenuation coefficient is the following equation

는 상기 감쇄 계수,

는 상기 식별된 송신기에 설정된 레이저 신호 세기,

는 상기 수신된 레이저 신호의 세기,

는 상기 산출된 이동 거리)을 이용하여 산출될 수 있다.(At this time,

Is the attenuation factor,

Is the laser signal strength set in the identified transmitter,

Is the intensity of the received laser signal,

May be calculated using the calculated moving distance.

The information related to each of the plurality of transmitters further includes a transmission angle that can be received from each of the plurality of transmitters and a distance to each of the plurality of transmitters, and the receiver includes a transmission angle that can be received from the identified transmitter and the reception. The traffic volume information may be estimated when at least one of the difference between the transmission angle included in the detected laser signal and the difference between the distance between the identified transmitter and the calculated moving distance is greater than or equal to a preset value.

The transmitter receives climate information and traffic volume information estimated by the received receiver from a receiver that receives the laser signal among a plurality of receivers including the receiver, and based on the received climate information and traffic volume information. Climate information and traffic volume information on the periphery of the transmitter may be generated, and the climate information and traffic volume information on the generated transmitter may be transmitted to the user's vehicle.

According to one or more exemplary embodiments, a method of measuring a visibility distance includes: transmitting, by a transmitter, a laser signal including identification information of the transmitter and information on the transmission angle while changing a transmission angle; At a receiver, receiving the laser signal; And estimating, at the receiver, at least one of climate information and traffic volume information based on identification information of the transmitter and information on a transmission angle included in the received laser signal.

The dispensing may include changing the dispensing angle by rotating at a preset rotation speed.

The laser signal may further include a transmission time of the laser signal.

The estimating may include, when the laser signal is received, measure a reception time of the laser signal, and calculate a movement distance of the laser signal based on a transmission time and a reception time of the laser signal.

The visibility distance measuring method may further include storing, at the receiver, information associated with each of the plurality of transmitters including the transmitter.

The information associated with each of the plurality of transmitters includes identification information of each of the plurality of transmitters, and the estimating includes, when the laser signal is received, identification information of each of the plurality of transmitters and the received laser signal. The transmitter which has transmitted the received laser signal may be identified based on identification information of the transmitter included in the transmitter.

The information related to each of the plurality of transmitters further includes a transmission angle receivable from each of the plurality of transmitters and a distance with each of the plurality of transmitters, and the estimating includes: a transmission angle receivable from the identified transmitter; The climate based on the intensity of the received laser signal when the difference between the transmission angles included in the received laser signal and the difference between the distance with the identified transmitter and the calculated travel distance are within a preset value. Information can be estimated.

The information related to each of the plurality of transmitters further includes a laser signal intensity set in each of the plurality of transmitters, and the estimating comprises: calculating the calculated travel distance, the intensity of the received laser signal, and the identified transmitter. The attenuation coefficient for the received laser signal may be calculated based on the set laser signal strength, and the climate information may be estimated based on the calculated attenuation coefficient.

The attenuation coefficient is the following equation

It can be calculated using.

The information related to each of the plurality of transmitters further includes a transmission angle receivable from each of the plurality of transmitters and a distance with each of the plurality of transmitters, and the estimating includes: a transmission angle receivable from the identified transmitter; The traffic volume information may be estimated when at least one of the difference between the transmission angles included in the received laser signal and the difference between the distance between the identified transmitter and the calculated movement distance is greater than or equal to a preset value.

The method for measuring the visibility distance may include, after the estimating, receiving, by the transmitter, weather information and traffic volume information estimated by the received receiver from a receiver that receives the laser signal among a plurality of receivers including the receiver. Doing; Generating, at the transmitter, climate information and traffic information about the transmitter based on the received climate information and traffic information; And transmitting, at the transmitter, climate information and traffic volume information about the generated transmitter to a user's vehicle.

According to the disclosed embodiments, by transmitting a laser signal including the identification information and the transmission angle information of the transmitter, to secure a field of view, such as when there is a curved section or obstacles through a plurality of transmitters and a plurality of receivers that are separated from each other The visibility distance can be measured smoothly even in difficult environments.

1 is a block diagram of a visibility distance measuring system according to an embodiment
2 is a flowchart illustrating a method for measuring a visibility distance according to an exemplary embodiment.
3 is a flowchart of a method of estimating at least one of climate information and traffic volume information, according to an exemplary embodiment.
4 is a flowchart illustrating a method of transmitting climate information and traffic volume information to a user's vehicle, according to an exemplary embodiment.
5 is a block diagram illustrating and describing a computing environment including a computing device suitable for use in example embodiments.

Hereinafter, specific embodiments will be described with reference to the drawings. The following detailed description is provided to assist in a comprehensive understanding of the methods, devices, and / or systems described herein. However, this is only an example and is not limited thereto.

In describing the embodiments, when it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, terms to be described below are terms defined in consideration of functions, which may vary according to intention or custom of a user or an operator. Therefore, the definition should be made based on the contents throughout the specification. The terminology used in the description is for the purpose of describing particular embodiments only and should not be limiting. Unless expressly used otherwise, the singular forms “a,” “an,” and “the” include plural forms of meaning. Also, expressions such as "comprises" or "equipment" are intended to refer to certain features, numbers, steps, actions, elements, portions, or combination thereof, and one or more other features than those described. , They should not be construed to exclude the presence or possibility of numbers, steps, operations, elements, portions or combinations thereof.

1 is a block diagram of a visibility distance measuring system 100 according to an exemplary embodiment.

Referring to FIG. 1, the visibility distance measurement system 100 includes a plurality of transmitters and a plurality of receivers. In this case, each of the plurality of transmitters and the plurality of receivers may have unique identification information.

Meanwhile, in FIG. 1, a plurality of transmitters and a plurality of receivers are described as being positioned in the lane 101. However, this is only an example, and the positions of the plurality of transmitters and the plurality of receivers may be located at various places according to the embodiment. Can be. In addition, the number of transmitters and receivers included in the visibility distance measuring system 100 is not limited to the example illustrated in FIG. 1, and the number of transmitters and receivers may be variously set according to embodiments.

The transmitter 110 transmits a laser signal including identification information of the transmitter 110 and information about the transmission angle while changing the transmission angle.

In detail, the transmitter 110 may generate bit stream information on the transmission angle by encoding the identification information and the transmission angle information of the transmitter 110.

In this case, the bit stream information may be generated by using an optical code division multiple access (OCDMA), for example. In addition, the transmitter 110 may convert the bit stream information on the generated transmission angle into a laser signal. In this case, the laser signal may be, for example, a laser pulse stream having an energy corresponding to a maximum permissible exposure (MPE) of class 1.

According to an embodiment, the transmitter 110 may rotate at a preset rotational speed to change the transmission angle.

In detail, the transmitter 110 may change the transmission angle based on a preset angle interval while rotating 360 degrees at a preset rotation speed. In this case, the preset angle interval may be determined by, for example, the angle resolution of the transmitter 110. For example, assuming that the rotation speed is 600 RPM and the preset angular interval is 0.5 degrees, the transmitter 110 may transmit a laser signal after stopping rotation every 0.5 degrees while rotating 360 degrees 10 times per second. have.

Meanwhile, the laser signal transmitted by the transmitter 110 may further include a transmission time of the laser signal.

In detail, the transmitter 110 may measure a transmission time with respect to a time point at which the laser signal is transmitted, and transmit the measured transmission time by including the measured transmission time in the laser signal.

The receiver 120 receives the laser signal and estimates at least one of the weather information and the traffic volume information based on the identification information and the transmission angle information of the transmitter included in the received laser signal.

Specifically, the receiver 120 may receive a laser signal in all directions 360 degrees, and convert the received laser signal from an optical signal to an electrical signal. Thereafter, the receiver 120 may convert the converted electrical signal into a digital signal using a digitizer. The receiver 120 may detect a pulse in the converted digital signal and convert the detected pulse into bit stream information. The receiver 120 may obtain the identification information and the transmission angle information of the transmitter that transmitted the received laser signal by decoding the converted bit stream information.

In addition, the receiver 120 may obtain the intensity of the received laser signal. For example, the receiver 120 may determine the maximum value of the pulse detected in the received laser signal as the intensity of the received laser signal.

According to an embodiment, when the laser signal is received, the receiver 120 measures a reception time of the received laser signal, and determines a moving distance of the received laser signal based on the transmission time and the reception time of the received laser signal. Can be calculated.

In detail, when the laser signal is received, the receiver 120 may measure a reception time of a time point at which the laser signal is received, and obtain a transmission time of the laser signal included in the received laser signal. Subsequently, the receiver 120 calculates a time-of-flight (ToF) of the received laser signal based on a transmission time and a reception time of the laser signal, and based on the calculated flight time, The travel distance can be calculated. For example, the receiver 120 may calculate the moving distance of the received laser signal by multiplying the calculated flight time and the speed of light.

On the other hand, since the time set in each of the transmitter 110 and the receiver 120 must be the same in order to calculate the accurate moving distance, the transmitter 110 and the receiver 120 periodically transmit and receive information on time to synchronize time. Can be.

According to an embodiment, the receiver 120 may store information associated with each of the plurality of transmitters including the transmitter 110.

In this case, the information related to each of the plurality of transmitters may be information stored through a reference information setting process in which the receiver grasps the information related to each of the plurality of transmitters before measuring the visibility distance. That is, the visibility distance measuring system 100 may measure the visibility distance after performing the reference information setting process between the plurality of transmitters and the plurality of receivers. For example, each transmitter may transmit the first laser signal including the identification information of each transmitter, the information on the transmission angle, and the information on the laser signal strength set in each transmitter, a predetermined number of times while changing the transmission angle. Then, when the first laser signal for each transmitter is received, each receiver may store information related to the transmitter that sent the received laser signal based on the information included in the received laser signal.

In this case, according to an embodiment, the information related to the plurality of transmitters may include identification information of each of the plurality of transmitters, information on a transmission angle that can be received from each of the plurality of transmitters, laser signal strengths set in each of the plurality of transmitters, and each of the plurality of transmitters. And distance to and from.

For example, the receiver 120 may store identification information of each of the plurality of transmitters through an identification number of each transmitter included in the first laser signal transmitted from each transmitter.

In addition, the receiver 120 may store information on the transmission angles that can be received from each of the plurality of transmitters through the information on the transmission angles of the transmitters included in the first laser signal transmitted from each transmitter.

In addition, the receiver 120 stores the laser signal strength set in each of the plurality of transmitters through the information on the laser signal strength set in each transmitter included in the first laser signal transmitted from each transmitter, or the first receiver of each received transmitter. The intensity of the laser signal may be measured to store the laser signal intensity set in each of the plurality of transmitters.

In addition, the receiver 120 may calculate a moving distance of the first laser signal of each transmitter based on the transmission time and the reception time of the first laser signal of each transmitter, and store distances with each of the plurality of transmitters.

On the other hand, the above-mentioned reference information setting process is a process for identifying the basic information necessary to measure the visibility distance, it can be performed on a day when the weather is clear and there is no vehicle. In the above-described example, the transmitter transmits the first laser signal to perform the reference information setting process, but the present invention is not limited thereto. For example, the transmitter 110 transmits basic information about itself to a plurality of receivers around the receiver, and the receiver 120 receives and stores basic information about each of the plurality of transmitters from each of the plurality of transmitters in the vicinity, The standard information setting process may be performed.

 According to an embodiment, when the laser signal is received, the receiver 120 may identify a transmitter that has transmitted the received laser signal based on identification information of the transmitter included in the received laser signal.

In detail, the receiver 120 may identify the transmitter that has transmitted the received laser signal by comparing the identification information of each of the plurality of previously stored transmitters with the identification information of the transmitter included in the received laser signal.

Meanwhile, the receiver 120 may identify a transmitter that transmits the received laser signal, and then extract information related to the identified transmitter from information associated with each of a plurality of previously stored transmitters. Thereafter, the receiver 120 may compare the information related to the identified transmitter and the information included in the received laser signal, and determine whether to estimate one of the climate information and the traffic volume information based on the comparison result. In detail, when the result of comparing the information related to the identified transmitter and the information included in the received laser signal is within a preset error range, the receiver 120 receives the climate information based on the information included in the received laser signal. If the estimated result is more than the error range, the traffic volume information may be estimated based on the information included in the received laser signal.

According to an embodiment, the receiver 120 presets a difference between a transmission angle that can be received from the identified transmitter and a transmission angle included in the received laser signal, and a difference between the distance to the identified transmitter and the calculated moving distance. If it is within the value, it is possible to estimate the climate information based on the intensity of the received laser signal.

In detail, the receiver 120 determines that a difference between a transmission angle that can be received from the identified transmitter and a transmission angle included in the received laser signal, and a difference between the distance to the identified transmitter and the calculated moving distance is within a preset error range. In this case, it may be determined that the received laser signal is not reflected by a specific object after being transmitted by the identified transmitter. In this case, the receiver 120 may determine that the vehicle does not exist between the identified transmitters and estimate the climate information based on the received laser signal.

According to an embodiment, the receiver 120 calculates an attenuation coefficient for the received laser signal based on the calculated moving distance, the strength of the received laser signal, and the laser signal strength set in the identified transmitter, and calculates the attenuation coefficient for the received laser signal. Climate information can be estimated based on

In this case, the attenuation coefficient may be calculated using Equation 1 below.

는 감쇄 계수,

는 식별된 송신기에 설정된 레이저 신호 세기,

는 수신된 레이저 신호의 세기,

는 산출된 이동 거리를 의미한다.In Equation 1

Is attenuation factor,

Is the laser signal strength set in the identified transmitter,

Is the intensity of the received laser signal,

Denotes the calculated moving distance.

Attenuation factor Climate Information Particle diameter (μm) Relative signal strength 0 sunshine 0.001

0.03 Light fog 0.07 One 9 Fog 2 750 28.5 smother 10

0.1 Light rain More than 100

10 Strong rain More than 10000

Specifically, referring to Table 1, the receiver 120 may estimate the climate information based on the calculated attenuation coefficient and the relative signal strength. In this case, the relative signal strength may mean a difference between the strength of the received laser signal and the laser signal strength set in the identified transmitter. For example, in the case of sunny weather, since the size of air particles in the atmosphere is small, the calculated attenuation coefficient and the relative signal strength may be small. As another example, in the case of rainy weather, the size of the air particles in the atmosphere is large, and thus the calculated attenuation coefficient and the relative signal intensity may be large.

Meanwhile, according to an exemplary embodiment, the receiver 120 may determine a difference between a transmission angle that can be received from the identified transmitter and a transmission angle included in the received laser signal, and a difference between the distance from the identified transmitter and the calculated moving distance. If the value is greater than or equal to the preset value, traffic volume information may be estimated.

Specifically, the receiver 120 is a difference between the transmission angle that can be received from the identified transmitter and the transmission angle included in the received laser signal, and the difference between the distance to the identified transmitter and the calculated moving distance is equal to or greater than a preset error range. In this case, it may be determined that the received laser signal is reflected by a specific object after being transmitted by the identified transmitter. In this case, the receiver 120 may determine that a vehicle exists between the identified transmitter and estimate traffic volume information.

For example, when it is determined that a vehicle exists between the identified transmitters, the receiver 120 may increase the value corresponding to the traffic amount by a predetermined value. In this case, the receiver 120 may accumulate and store values corresponding to the traffic volume for each transmitter.

Meanwhile, according to an exemplary embodiment, the transmitter 110 may receive weather information and traffic volume information estimated by a receiver received from a receiver that receives a laser signal among a plurality of receivers including the receiver 120. In addition, the transmitter 110 may generate climate information and traffic volume information around the transmitter based on the received climate information and traffic volume information, and transmit the generated climate information and traffic volume information to the user's vehicle.

In detail, each time the receiver 120 receives the laser signal, the receiver 120 may estimate the climate information or the traffic volume information and transmit the estimated climate information or the traffic volume information to the transmitter that transmits the received laser signal. The transmitter 110 receives the estimated climate information and the traffic volume information from the receivers receiving the laser signal transmitted by the transmitter 110, and generates the climate information and the traffic volume information around the transmitter 110 by combining the received information. have. For example, the transmitter 110 determines climate information such as sunny, fog, rain, and the like and traffic volume information, such as traffic congestion and traffic congestion, based on climate information and traffic volume information received from a plurality of receivers, and uses the determined information as a user. Can be sent to the vehicle.

In addition, the plurality of transmitters transmit and receive the generated climate information and the traffic volume information to each other to generate the integrated climate information and the integrated traffic information for the entire area in which the plurality of transmitters and the plurality of receivers are installed, and the generated integrated climate information and the integrated traffic information Can be transmitted to the user's vehicle.

2 is a flowchart of a method for measuring a visibility distance according to an exemplary embodiment.

The method shown in FIG. 2 may be performed by the visibility distance measurement system 100 shown in FIG. 1, for example.

Referring to FIG. 2, the visibility distance measuring system 100 transmits a laser signal including identification information of a transmitter and information about a sending angle while changing a sending angle (210).

At this time, the visibility distance measurement system 100 may rotate at a preset rotation speed to change the delivery angle.

Then, the visibility distance measurement system 100 receives the laser signal (220).

Thereafter, the visibility distance measurement system 100 estimates at least one of the climate information and the traffic volume information based on the identification information of the transmitter and the transmission angle included in the received laser signal (230).

3 is a flowchart of a method of estimating at least one of climate information and traffic volume information, according to an exemplary embodiment.

The method shown in FIG. 3 may be performed by the visibility distance measurement system 100 shown in FIG. 1, for example.

Referring to FIG. 3, when a laser signal is received 310, the visibility distance measuring system 100 may measure a reception time of a laser signal (320).

Thereafter, the visibility distance measuring system 100 may calculate a movement distance of the laser signal based on the transmission time and the reception time of the laser signal (330).

Thereafter, the visibility distance measuring system 100 may identify the transmitter that has transmitted the received laser signal based on identification information of the transmitter included in the received laser signal (340).

)와 수신된 레이저 신호에 포함된 송출 각도(

) 사이의 차이 및 식별된 송신기와의 거리(

)와 산출된 이동 거리(

) 사이의 차이가 기 설정된 값(ER) 이내인 경우(350, 360), 수신된 레이저 신호의 세기에 기초하여 기후 정보를 추정할 수 있다(370).Thereafter, the visibility distance measurement system 100 transmits a transmission angle (receivable) that can be received from the identified transmitter.

) And the sending angle included in the received laser signal (

) And the distance from the identified transmitter (

) And calculated travel distance (

If the difference is within a predetermined value ER (350, 360), the climate information may be estimated based on the intensity of the received laser signal (370).

At this time, the visibility distance measuring system 100 calculates an attenuation coefficient for the received laser signal based on the calculated moving distance, the intensity of the received laser signal, and the laser signal intensity set in the identified transmitter, and calculates the attenuation coefficient for the calculated attenuation coefficient. Climate information can be estimated based on this.

)와 수신된 레이저 신호에 포함된 송출 각도(

) 사이의 차이 및 식별된 송신기와의 거리(

)와 산출된 이동 거리(

) 사이의 차이 중 적어도 하나가 기 설정된 값(ER) 이상인 경우(350, 360), 교통량 정보를 추정할 수 있다(380).On the other hand, the visibility distance measurement system 100 is a transmission angle (receivable) that can be received from the identified transmitter (

) And the sending angle included in the received laser signal (

) And the distance from the identified transmitter (

) And calculated travel distance (

If at least one of the differences between the two or more is greater than or equal to the predetermined value ER (350, 360), the traffic volume information may be estimated (380).

4 is a flowchart illustrating a method of transmitting climate information and traffic volume information to a user's vehicle, according to an exemplary embodiment.

The method shown in FIG. 4 may be performed by the visibility distance measurement system 100 shown in FIG. 1, for example.

Referring to FIG. 4, the visibility distance measurement system 100 may receive climate information and traffic volume information estimated by a receiver received from a receiver that receives a laser signal among a plurality of receivers (410).

Thereafter, the visibility distance measurement system 100 may generate climate information and traffic volume information on the periphery of the transmitter based on the received climate information and traffic volume information (420).

Thereafter, the visibility distance measurement system 100 may transmit climate information and traffic volume information about the generated transmitter to the user's vehicle (430).

Meanwhile, in the flowcharts shown in FIGS. 2 to 4, the method is divided into a plurality of steps, but at least some of the steps may be performed in a reverse order, in combination with other steps, omitted, or divided into detailed steps. It may be performed or may be performed in addition to one or more steps not shown.

5 is a block diagram illustrating and describing a computing environment including a computing device suitable for use in example embodiments. In the illustrated embodiment, each component may have different functions and capabilities in addition to those described below, and may include additional components in addition to those described below.

The illustrated computing environment 10 includes a computing device 12. In one embodiment, computing device 12 may be, for example, one or more components included in transmitter 110 shown in FIG. 1. In addition, computing device 12 may be, for example, one or more components included in receiver 120 shown in FIG. 1.

Computing device 12 includes at least one processor 14, computer readable storage medium 16, and communication bus 18. The processor 14 may cause the computing device 12 to operate according to the example embodiments mentioned above. For example, processor 14 may execute one or more programs stored in computer readable storage medium 16. The one or more programs may include one or more computer executable instructions that, when executed by the processor 14, cause the computing device 12 to perform operations in accordance with an exemplary embodiment. Can be.

Computer readable storage medium 16 is configured to store computer executable instructions or program code, program data and / or other suitable forms of information. The program 20 stored in the computer readable storage medium 16 includes a set of instructions executable by the processor 14. In one embodiment, computer readable storage medium 16 includes memory (volatile memory, such as random access memory, nonvolatile memory, or a suitable combination thereof), one or more magnetic disk storage devices, optical disk storage devices, flash Memory devices, or any other form of storage medium that is accessible by computing device 12 and capable of storing desired information, or a suitable combination thereof.

The communication bus 18 interconnects various other components of the computing device 12, including the processor 14 and the computer readable storage medium 16.

Computing device 12 may also include one or more input / output interfaces 22 and one or more network communication interfaces 26 that provide an interface for one or more input / output devices 24. The input / output interface 22 and the network communication interface 26 are connected to the communication bus 18. The input / output device 24 may be connected to other components of the computing device 12 via the input / output interface 22. Exemplary input / output devices 24 may include pointing devices (such as a mouse or trackpad), keyboards, touch input devices (such as touchpads or touchscreens), voice or sound input devices, various types of sensor devices, and / or imaging devices. Input devices, and / or output devices such as display devices, printers, speakers, and / or network cards. The example input / output device 24 may be included inside the computing device 12 as one component of the computing device 12, and may be connected to the computing device 12 as a separate device from the computing device 12. It may be.

The technical features have been described above based on the embodiments. However, the disclosed embodiments are to be considered in descriptive sense only and not for purposes of limitation, and the scope of the rights is set forth in the claims rather than the foregoing description, and all differences within the scope are equivalent to the scope of the claims. Should be.

10: Computing Environment
12: computing device
14: Processor
16: computer readable storage media
18: communication bus
20: Program
22: I / O interface
24: input / output device
26: network communication interface
100: visibility distance measuring system
110: transmitter
120: receiver

Claims (22)

A transmitter for transmitting a laser signal including identification information of the transmitter and information on the transmission angle while changing the transmission angle; And
A receiver which receives the laser signal and estimates at least one of climate information and traffic volume information based on identification information of the transmitter and information on a transmission angle included in the received laser signal,
The receiver stores information associated with each of a plurality of transmitters including the transmitter,
The information related to each of the plurality of transmitters includes a transmission angle that can be received from each of the plurality of transmitters and a distance to each of the plurality of transmitters,
The receiver may include a difference between a transmission angle that can be received from a transmitter that transmits the received laser signal among the plurality of transmitters, a transmission angle included in the received laser signal, and a distance between the transmitter that transmits the received laser signal And estimating the climate information based on the strength of the received laser signal when the difference between the moving distance of the laser signal and the received laser signal is within a preset value.
The method according to claim 1,
And the transmitter rotates at a preset rotational speed to change the delivery angle.
The method according to claim 1,
The laser signal further comprises a transmission time of the laser signal.
The method according to claim 3,
And the receiver measures a reception time of the laser signal when the laser signal is received, and calculates a moving distance of the laser signal based on a transmission time and a reception time of the laser signal.
delete The method according to claim 4,
The information associated with each of the plurality of transmitters further includes identification information of each of the plurality of transmitters,
The receiver may, when the laser signal is received, a visibility distance for identifying a transmitter that has transmitted the received laser signal based on identification information of each of the plurality of transmitters and identification information of the transmitter included in the received laser signal. Measuring system.
delete The method according to claim 6,
The information related to each of the plurality of transmitters further includes a laser signal strength set in each of the plurality of transmitters,
The receiver calculates an attenuation coefficient for the received laser signal based on the calculated travel distance, the intensity of the received laser signal, and the laser signal strength set in the identified transmitter, and based on the calculated attenuation coefficient. A visibility distance measurement system for estimating the climate information.
The method according to claim 8,
The attenuation coefficient is the following equation

(At this time,

Is the attenuation factor,

Is the laser signal strength set in the identified transmitter,

Is the intensity of the received laser signal,

Is a calculated distance calculated by using the calculated travel distance.
The method according to claim 6,
The information related to each of the plurality of transmitters further includes a transmission angle that can be received from each of the plurality of transmitters and a distance to each of the plurality of transmitters,
The receiver may include at least one of a difference between a transmission angle receivable from the identified transmitter and a transmission angle included in the received laser signal, and a difference between a distance from the identified transmitter and the calculated movement distance. And a visibility distance measurement system for estimating the traffic volume information when the value is greater than or equal to a set value.
The method according to claim 1,
The transmitter receives climate information and traffic volume information estimated by the received receiver from a receiver that receives the laser signal among a plurality of receivers including the receiver, and based on the received climate information and traffic volume information. A visibility distance measuring system for generating climate information and traffic volume information for the vicinity of the transmitter, and transmits the climate information and traffic volume information about the generated transmitter to the user's vehicle.
Transmitting, at the transmitter, a laser signal including identification information of the transmitter and information on the transmission angle while changing the transmission angle;
At a receiver, receiving the laser signal; And
Estimating, at the receiver, at least one of climate information and traffic volume information based on identification information of a transmitter and information on a transmission angle included in the received laser signal,
At the receiver, storing information associated with each of a plurality of transmitters including the transmitter;
The information related to each of the plurality of transmitters includes a transmission angle that can be received from each of the plurality of transmitters and a distance to each of the plurality of transmitters,
The estimating may include: a difference between a transmission angle that can be received from a transmitter that has transmitted the received laser signal among the plurality of transmitters, a transmission angle included in the received laser signal, and a transmitter that has transmitted the received laser signal; And estimating the climate information based on the strength of the received laser signal when a difference between a distance of and a moving distance of the received laser signal is within a preset value.
The method according to claim 12,
The transmitting step, the visibility distance measurement method for changing the transmission angle by rotating at a predetermined rotation speed.
The method according to claim 12,
The laser signal further comprises a transmission time of the laser signal.
The method according to claim 14,
In the estimating step, when the laser signal is received, measuring the reception time of the laser signal, and calculates the movement distance of the laser signal based on the transmission time and the reception time of the laser signal.
delete The method according to claim 15,
The information associated with each of the plurality of transmitters further includes identification information of each of the plurality of transmitters,
The estimating may include identifying, when the laser signal is received, a transmitter that transmits the received laser signal based on identification information of each of the plurality of transmitters and identification information of the transmitter included in the received laser signal. How to measure visibility distance.
delete The method according to claim 17,
The information related to each of the plurality of transmitters further includes a laser signal strength set in each of the plurality of transmitters,
The estimating may include calculating an attenuation coefficient for the received laser signal based on the calculated moving distance, the intensity of the received laser signal, and the laser signal intensity set in the identified transmitter, and calculating the calculated attenuation coefficient. A visibility distance measuring method for estimating the climate information based on the.
The method according to claim 19,
The attenuation coefficient is the following equation

(At this time,

Is the attenuation factor,

Is the laser signal strength set in the identified transmitter,

Is the intensity of the received laser signal,

Is a calculated distance calculated by using the calculated moving distance.
The method according to claim 17,
The information related to each of the plurality of transmitters further includes a transmission angle that can be received from each of the plurality of transmitters and a distance to each of the plurality of transmitters,
The estimating may include at least one of a difference between a transmission angle receivable from the identified transmitter and a transmission angle included in the received laser signal, and a difference between a distance from the identified transmitter and the calculated travel distance. The visibility distance measuring method for estimating the traffic volume information when the predetermined value or more.
The method according to claim 12,
After the estimating step,
Receiving, at the transmitter, weather information and traffic volume information estimated by the received receiver from a receiver that receives the laser signal among a plurality of receivers including the receiver;
Generating, at the transmitter, climate information and traffic information about the transmitter based on the received climate information and traffic information; And
And transmitting, by the transmitter, climate information and traffic volume information about the generated transmitter to a user's vehicle.

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