KR101086738B1 - System and method for managing the limited speed based on the road visibility - Google Patents

Abstract

The present invention relates to a system and a method for managing a driving continuity of a road according to a change in visibility distance based on a ubiquitous sensor network. In more detail, in order to prevent large traffic accidents caused by bad weather such as heavy rain, heavy snow, and fog, the visibility distance is measured using the intelligent visibility sensor node based on the ubiquitous sensor network, and the road driving limit according to the visibility distance The present invention relates to a system and method for intelligently calculating speed and automatically notifying roadside digital speed boards, electronic signs, telematics vehicles, and driver mobile phones.

According to the present invention, it is possible to ensure the safe driving of the road in real time by allowing the driver to reduce the running speed when the road running clock situation is poor from fog, heavy rain, heavy snow and the like.

Road, visibility, driving

Description

System and method for managing the driving continuity of road according to the change of visibility distance {System and method for managing the limited speed based on the road visibility}

The present invention relates to a system and a method for managing a driving continuity of a road according to a change in visibility distance based on a ubiquitous sensor network. In more detail, in order to prevent large traffic accidents caused by bad weather such as heavy rain, heavy snow, and fog, the visibility distance is measured using the intelligent visibility sensor node based on the ubiquitous sensor network, and the road driving limit according to the visibility distance The present invention relates to a system and method for intelligently calculating speed and automatically notifying roadside digital speed boards, electronic signs, telematics vehicles, and driver mobile phones.

Commonly used transportation methods include roads, ports, railroads and air traffic. Of these, roads are the most common means of transportation, with more non-professional drivers driving than professional drivers. Therefore, most of the traffic accidents are caused by vehicles on the road, and many of them are caused by the driver not coping with the sudden situation due to speeding.

In particular, when the driver's visibility distance is reduced due to bad weather such as rainy weather or fog, or when there is an obstacle to driving of the vehicle due to the sliding of the road, the appropriate speed should be lower than the proper speed of the normal road. Informing the driver of the lowered speed is more necessary to prevent traffic accidents.

To this end, there is a need for a technique for detecting a change in visibility distance of a designated road area (for example, a road in a fog area) and informing a driver of a vehicle.

In particular, a technology that can detect the change in visibility distance of a specific area such as a fog area in real time and quickly and intelligently inform the fact of the weather change and the appropriate speed limit of the road accordingly.

The present invention is to solve the above problems, by configuring a USN sensor node for each section using the ubiquitous visibility distance sensor node, and intelligently adjust the running limit speed of the road according to the change in visibility distance due to bad weather, By real-time notification on the driver's vehicle telematics and mobile phone SMS text notification, section display board, and digital road driving limit board, it is an advanced technology to secure road safety when road clock conditions are poor from fog, heavy rain and heavy snow. It is an object to provide a system and method.

In addition, another object of the present invention is to provide a system and method for efficiently transmitting data sensed by a sensor node in order to reduce power consumption during data transmission in a ubiquitous sensor node.

In the present invention,

In the driving continuity management system according to the change of visibility distance based on ubiquitous sensor network (USN),

At least one sensor node that measures the surrounding visibility distance and transmits the individual specific speed obtained according to the visibility distance to the continuity generation unit;

A driving continuity generation unit which receives the individual driving speed from the sensor node and generates the driving continuity based on the received driving speed;

A driving continuity management system according to a change in a viewing distance including a notification unit for notifying a driver of a driving continuity generated by the driving continuation generation unit is provided.

The continued continuity generating unit,

Compares whether the received individual speed is different from the current driving continuity registered,

If the received individual speed is lower than the current driving continuity, the received individual speed is generated as a new driving continuity.

If the received individual speed is higher than the current driving continuity, the received individual speed and all individual speeds previously registered by each sensor node are checked and the newest driving speed is the lowest. It characterized in that to generate.

Also,

In the driving continuity management method according to the change of visibility distance based on the ubiquitous sensor network (USN),

A first step of measuring a visibility distance at the sensor node and transmitting the individual specific speed obtained according to the measured visibility distance to the continued continuity generation unit;

Generating a continuity of driving based on the individual specific speed transmitted from the driving continuity generating unit;

And a three step of notifying the driver of the continued continuation in the notification unit,

The first step,

Compare the obtained individual speed with the previously stored relatively constant speed, and transmit the individual speed when the individual speed is not equal to the relative speed.

The driving continuity management method according to the change of visibility distance is characterized by updating at a relatively constant speed for the next comparison with the obtained individual speed.

In addition, the driving continuity management method according to the change of the viewing distance based on the ubiquitous sensor network (USN),

A first step of measuring a visibility distance at the sensor node and transmitting the individual specific speed obtained according to the measured visibility distance to the continued continuity generation unit;

Generating a continuity of driving based on the individual specific speed transmitted from the driving continuity generating unit;

And a three step of notifying the driver of the continued continuation in the notification unit,

The second step,

Compares whether the received individual speed is different from the current driving continuity registered,

If the received individual speed is lower than the current driving continuity, the received individual speed is generated as a new driving continuity.

If the received individual speed is higher than the current driving continuity, the received individual speed and all individual speeds previously registered by each sensor node are checked and the newest driving speed is the lowest. The driving continuity management method according to the change of visibility distance is generated, which is generated by the present invention.

In addition, in the method for generating the driving continuity according to the change of the viewing distance based on the ubiquitous sensor network (USN),

The sensor node measures the visibility distance and transmits the individual speed determined based on the measured visibility distance to the continuity generator.

Comparing the obtained individual constant speed with a previously stored relatively constant speed and transmitting the obtained individual constant speed when the individual speed is not equal to the relatively constant speed;

The driving continuity generation unit generates a continuity driven based on the individual specific speed received from the

Compares whether the received individual speed is different from the current driving continuity registered,

If the received individual speed is lower, the received individual speed is generated as a new driving continuity,

If the received individual speed is higher, it includes two steps of checking the received individual speed and all the individual speeds previously received and registered, and generating the lowest individual speed as the new driving continuity. A method for generating a driving continuity according to a change in visibility distance is presented.

together,

In the intelligent sensor node that obtains the proper driving speed according to the change of the visibility distance,

A sensor unit for measuring a viewing distance;

Comprising a processor for obtaining a proper running speed according to the visibility based on the distance measured by the sensor,

The processor unit,

It is determined whether the obtained proper driving speed is the same as the previously stored relatively constant speed, and if it is not the same, the proper driving speed is transmitted to the external device through the communication module.

The sensor node is characterized by updating the obtained optimum driving speed to a relatively constant speed for the next comparison.

According to the present invention, it is possible to ensure a safe driving of the road in real time by allowing the driver to reduce the running speed when the road running clock situation is poor from fog, heavy rain, heavy snow, etc.,

In particular, it is possible to effectively provide the driving continuity of the road according to the change of the visibility distance in real time to the driver who drives a specific area where the weather change shows a severe deviation in each subregion.

In addition, in order to reduce power consumption during data transmission from the ubiquitous sensor node, it is possible to efficiently transmit the surrounding environment data sensed by the sensor node.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the embodiment of the present invention.

1 is a configuration diagram of a driving continuity management system according to a change in visibility distance according to an exemplary embodiment of the present invention.

Looking at the configuration, at least one sensor node (110-1, 110-2, ...., 110-n), and the driving continuity generation unit 200 for receiving and processing the individual specific speed information from the sensor node And a notification unit 300 which receives the driving continuity from the traveling continuity generation unit 200 and notifies the driver.

The one or more sensor nodes 110-1, 110-2,..., 110-n respectively include a sensor unit 111 for measuring a viewing distance; A processor unit 112 that calculates an individual specific speed based on the visibility distance measured by the sensor unit 111; It includes a communication module 113 for transmitting the individual specific speed information calculated by the driving continuity generation unit 200.

The sensor unit 111 is for measuring a viewing distance, and is a sensor for measuring a viewing distance due to fog, rainfall, snowfall, or the like. After measuring the visibility distance, the measured visibility distance is transmitted to the processor 112.

The processor unit 112 processes a specific procedure according to a program stored in a memory (not shown in the drawing), and the memory is processed by the processor unit 112 and a program to be executed by the processor unit 112. Stores a piece of information and a unique identification code for identifying the sensor node.

In addition, the processor converts the received data into a signal suitable for processing by the communication module 113 and transmits it to an external device through the communication module 113.

The communication module 113 receives the data from the processor unit 112, converts the signal into an RF signal, transmits the signal to an external device, receives an RF signal from the outside, and inversely converts the received signal to the processor unit. send.

Each sensor node is connected to a ubiquitous sensor network (USN), and transmits and receives various data to each other, and each data transmitted and received is finally collected by the driving continuity generation unit 200.

Although not shown in the figure, a power source for supplying power to each of the above components is also included.

The driving continuity generation unit 200 includes: a register unit 210 for receiving an individual predetermined speed from each of the sensor nodes and storing the specific speed for the corresponding sensor node; The processor unit 220 generates a continuation of driving based on the individual specific speeds stored in the register unit 210. Although not shown in the drawing, it includes a communication module for receiving an individual predetermined speed from each sensor node and transmitting the generated driving continuity to the notification unit 300.

The register unit 210 is configured to update and store the respective specific speed for each sensor node.

The processor unit 220 recognizes the unique identification number for each sensor node included in the individual specific speed transmitted from the sensor node, updates and stores the individual specific speed in the register unit for each sensor node, and registers the current running limit. Generates a speed and other new driving duration.

 2 is a flowchart illustrating a method of processing an individual specific speed in the driving continuity generation unit according to an embodiment of the present invention.

First, the driving continuity generation unit 200 receives the individual appropriate speed from the sensor node (S201).

Next, it is determined whether or not the individual specific speed transmitted from the processor 220 is lower than the current driving continuity registered (S202).

Next, when it is determined that the step is lower in step S202, and generates the individual transmission speed is transmitted as a new driving continuity (S203), and transmits the generated new driving continuity to the notification unit 300 and The current driving continuity is updated and registered as a new traveling continuity (S204), and the registration is updated and registered in the register of the corresponding sensor node which transmits the individual specific speed transmitted to the register unit 220 (S205).

Next, if it is determined in step S202 that it is not low, it is determined whether it is higher (S206), and if it is higher as a result of determination, registers the individual specific speed received in the register of the corresponding sensor node, and registers all individual personal registrations. If all the individual speeds are higher than the current driving continuity by checking the speed, the individual speeds indicating the lowest speed among all the individual speeds checked are generated as the new driving continuity (S207), and the generated speeds are generated. The new driving continuity is transmitted to the notification unit, and the current driving continuity is updated and registered with the generated new driving continuation (S208).

If the result of the determination in step S206 is not higher (that is, when the current driving continuity and the individual specific speed are the same), the received individual specific speed is registered in the register of the corresponding sensor node (S205).

In this way, it is possible to notify the road driver of the driving continuity obtained by quickly analyzing in real time the individual specific speed transmitted from the sensor nodes in a certain area.

In the above embodiment, the sensor unit may further include a fog sensor, a rainfall sensor, and a snow sensor in addition to the visual distance measurement sensor to transmit the detected weather information to the driving continuity generator in addition to the individual speed. have. For example, when the fog generation information is added to the specific speed according to the fog generation and transmitted, the driving continuity generation unit transmits weather information indicating that fog has occurred in addition to the driving continuity information, and transmits to the notification unit. The branch can notify the driver of weather information that caused the driving continuity in addition to the driving continuation.

The notification unit 300 refers to a means for notifying the driver of the driving continuation received from the driving continuation generation unit 200.

This includes an electronic signboard or digital speed board that receives and displays the driving continuity, wireless transmission means for transmitting the driving continuity to the wireless receiving means attached to the vehicle driving on the road, and provides location-based services to the mobile phone. The server may be connected to a server to provide a continuity of driving to a location-based service server.

3 is a diagram illustrating an example in which the notification unit notifies the driver of continued driving. (a) is to display the continuity traveled in the navigation having a telematics function by the radio transmitting means, (b) is an example for notifying the driver of the continuity traveled on the electric signboard existing on the road. (c) displays the driving continuity on the mobile phone provided with the location-based service through the server providing the driving continuity.

In addition to the driving continuity (limit speed), weather information (eg, local heavy rain occurrence) may be included, and road information (eg, 5km ahead) from which the weather change occurs may be further included.

4 is a flowchart illustrating a method of processing an individual constant speed obtained according to a visibility distance in a sensor node according to an embodiment of the present invention.

First, the visibility distance is measured by the sensor unit 111 (S401).

Next, based on the visibility distance measured by the processor unit 112 determines the individual appropriate speed (S402).

That is, after setting the section grade by dividing the appropriate speed by the section range, the individual appropriate speed corresponding to the specific section can be obtained. For example, as shown in the table below, if the visibility distance is 35m, the individual speed is set to 60km per hour.

Individual speed (km / h) Visibility (m) 30 0 to 10 40 10 to 20 50 20 to 30 60 30 to 40 ....

In this way, it is appropriate to manage the driving continuity by operating the corresponding individual speed at the time of dividing the visibility distance by section.In some embodiments, the formula for calculating the individual speed according to the measured visibility distance is applied. You can also determine the individual speed.

Next, the processor 112 determines whether the predetermined transmission threshold condition is satisfied (S403).

The specified transmission threshold condition is as follows. That is, in the above table, if the distance exceeds 40m, if it is set to not affect the driving continuity according to the distance, the individual speed can be transmitted only when the distance is less than 40m. It can be called a critical condition. This is to prevent waste of power due to unnecessary data transmission by not transmitting data to the continuity generation unit that is driven from the sensor node for the visibility distance which does not need to change the driving continuity.

In some embodiments, the transmission threshold may be set to a specific individual speed instead of a visibility distance. For example, it may be possible to transmit only at an individual speed of 50 km or less per hour.

Next, when the transmission threshold condition is satisfied in step S403, the processor 112 determines whether the individual proper speed is equal to the comparison proper speed (S404). The comparison proper speed as a reference is the data updated and stored in the memory by the processor 112 in the previous procedure.

After the determination is completed, the processor 112 updates and stores the individual proper speed at the comparison proper speed for the next comparison.

Next, when it is determined that the step is not the same in step S404, the processor 112 transmits the individual specific speed to the continuity generation unit that has traveled through the communication module 113 (S405). At this time, the individual specific speed transmitted includes an identification code for identifying the sensor node, and may also include a sensing time.

Next, the processor 112 resets the comparison cumulative number, which is the number of times that the individual proper speed is compared with the comparative proper speed, in step S404 to 0 (S406).

Next, when it is determined in step S404 that the same is the same, the processor 112 compares the current cumulative cumulative number with a preset and stored cumulative limit number to determine whether it is the same (S407). The initial value of the comparison cumulative number is zero.

Next, when it is determined that it is not the same in step S407, the processor 112 replaces the comparison cumulative number with a value obtained by adding 1 to the current comparison cumulative number (S408), and determines that it is the same in step S407. If so, the processor 112 performs the steps S405 and S406.

FIG. 5 is a diagram for describing data transmission control by a cumulative limit number in a sensor node according to an exemplary embodiment of the present invention.

5 is a case where the cumulative limit number is set to three.

The initial letters (p ₁ , p ₂ , p ₃ , p ₄ ) in parentheses on the time axis mean individual fixed speeds over time, and the latter letters (c ₁ , c ₂ , c ₃ , c ₄ ) It means a relatively constant speed that matches the first letter.

N _c below the time axis represents the cumulative number of comparisons.

FIG. 5 (a) is a description of the case where the comparison cumulative number proceeds to the same as the cumulative limit number. Even when (p ₄ = c ₄ ), the comparison cumulative number is transferred after transmitting p ₄ to the driving continuity generator. The reset to zero is explained.

FIG. 5 (b) is a description of a case where a proper driving speed different from a relatively constant speed is sensed before the comparison cumulative number reaches the cumulative limit number, and when (p ₃ ≠ c ₃ ), a continuity generated by driving p ₃ After the negative transfer, the comparison accumulated count is reset to zero.

In the above embodiment, the control by the cumulative limit has been described as controlling the number of times of comparing the individual constant speed and the relatively constant speed, but the comparison limit criteria may be controlled by the comparison time rather than the number of comparison.

That is, the processor 112 has a function of managing the passage of time, and when the individual specific speed is transmitted to the driving continuity generation unit, the comparison time value is reset to 0, and the individual proper speed is compared from the reset time point. When the comparison time value, that is, the time until the time to compare the proper speed, has passed the set comparison time limit (for example, 30 seconds), the continuity generating unit that has traveled even if the first individual speed specified after the elapsed time is equal to the relatively constant speed is passed. It is also possible to transmit and reset the comparison time value to zero.

1 is a configuration diagram of a driving continuity management system according to a change in visibility distance according to an exemplary embodiment of the present invention.

2 is a flowchart illustrating a method of processing an individual specific speed in the driving continuity generation unit according to an embodiment of the present invention.

3 is a diagram illustrating an example of notifying a driver of a continuation of driving in a notification unit according to an exemplary embodiment of the present invention.

4 is a flowchart illustrating a method of processing an individual constant speed obtained according to a visibility distance in a sensor node according to an embodiment of the present invention.

FIG. 5 is a diagram for describing data transmission control by a cumulative limit number in a sensor node according to an exemplary embodiment of the present invention.

Claims (12)

In the driving continuity management system according to the change of visibility distance based on ubiquitous sensor network (USN), At least one sensor node that measures the surrounding visibility distance and transmits the individual specific speed obtained according to the visibility distance to the continuity generation unit; A driving continuity generation unit which receives the individual driving speed from the sensor node and generates the driving continuity based on the received driving speed; A notification unit for notifying a driver of the traveling continuity generated by the traveling continuation generation unit; The continued continuity generating unit, Compares whether the received individual speed is different from the current driving continuity registered, If the received individual speed is lower than the current driving continuity, the received individual speed is generated as a new driving continuity. If the received individual speed is higher than the current driving continuity, the received individual speed and all individual speeds previously registered by each sensor node are checked and the newest driving speed is the lowest. To create, The sensor node stores a predetermined range of speeds corresponding to each of the ranges of a predetermined visibility distance and a predetermined range of predetermined distances. And a transmission threshold condition relating to the visibility distance for transmitting the individual constant speed data from the sensor node to the traveling continuity generation unit is set and stored. delete The method according to claim 1, The sensor node, A sensor unit for measuring a peripheral viewing distance; A communication module for transmitting an individual specific speed; A processor unit for obtaining an individual constant speed based on the visibility distance measured by the sensor unit and processing the obtained individual constant speed; The processor unit, It is determined whether the obtained individual constant speed is the same as the previously stored relatively constant speed, and if it is not the same, the individual proper speed is transmitted to the driving continuity generation unit through the communication module, A driving continuity management system according to the change of visibility distance, wherein the obtained individual constant speed is updated to a relatively constant speed for the next comparison. The method according to claim 1, The sensor node, A sensor unit for measuring a peripheral viewing distance; A communication module for transmitting an individual specific speed; Comprising: Obtaining the individual specific speed based on the visibility distance measured by the sensor unit, and comprises a processor for processing the obtained individual specific speed, The processor unit, Determines whether the individual speed is equal to the previously stored relatively constant speed, If it is not the same, the individual specific speed is transmitted to the driving continuity generation unit through the communication module, If it is the same, the current comparison cumulative number is compared with the set cumulative limit number, and if the two are the same, the individual specific speed is transmitted through the communication module. Driving continuity management system according to the change in visibility distance, characterized in that for updating the cumulative number by adding the number. The method according to claim 1, The sensor node, A sensor unit for measuring a peripheral viewing distance; A communication module for transmitting an individual specific speed; A processor unit for obtaining an individual constant speed based on the visibility distance measured by the sensor unit and processing the obtained individual constant speed; The processor unit, Determines whether the individual speed is equal to the previously stored relatively constant speed, If it is not the same, the individual specific speed is transmitted to the driving continuity generation unit through the communication module, In the same case, when the comparison time value is compared with the set comparison time limit, and when the comparison time value exceeds the comparison time limit, the individual limit speed is transmitted through the communication module. Speed management system. The method according to any one of claims 3 to 5, The processor unit, A visibility distance characterized in that it is determined whether the individual specific speed and the relatively constant speed is the same when the transmission threshold condition for the visibility distance for transmitting the individual specific speed data from the sensor node to the running continuity generation unit is satisfied. Driving continuity management system according to the change. The method according to any one of claims 1 and 3 to 5, The notification unit, An electric signboard installed at a certain point on the road to indicate the continuity of driving, or a speed board installed at a point on the road to indicate the continuation of driving, or a wireless receiver installed in a vehicle driving on the road. Wireless transmission means for wirelessly transmitting the continuity driven on the road, or a server that provides a continuity driven to a location-based service server connected to a server that provides location-based services to a mobile phone. Speed limit management system. The method according to claim 1, The continued continuity generating unit, The driving continuity management system according to the change of the visibility distance, wherein the new driving continuity generated is updated and registered as the current driving continuity for the next comparison. In the driving continuity management method according to the change of visibility distance based on the ubiquitous sensor network (USN), A first step of measuring a visibility distance at the sensor node and transmitting the individual specific speed obtained according to the measured visibility distance to the continued continuity generation unit; Generating a continuity of driving based on the individual specific speed transmitted from the driving continuity generating unit; And a three step of notifying the driver of the continued continuation in the notification unit, The first step, Compare the obtained individual speed with the previously stored relatively constant speed, and transmit the individual speed when the individual speed is not equal to the relative speed. With the individual proper speed obtained, update to a relatively constant speed for the next comparison, The individual appropriate speeds are stored in a plurality of ranges related to predetermined visibility distances and speeds corresponding to respective ranges of the visibility distances. And a transmission threshold condition relating to the visibility distance for transmitting the individual specific speed from the sensor node to the continued continuity generation unit is set and stored. In the driving continuity management method according to the change of visibility distance based on the ubiquitous sensor network (USN), A first step of measuring a visibility distance at the sensor node and transmitting the individual specific speed obtained according to the measured visibility distance to the continued continuity generation unit; Generating a continuity of driving based on the individual specific speed transmitted from the driving continuity generating unit; And a three step of notifying the driver of the continued continuation in the notification unit, The second step, Compares whether the received individual speed is different from the current driving continuity registered, If the received individual speed is lower than the current driving continuity, the received individual speed is generated as a new driving continuity. If the received individual speed is higher than the current driving continuity, the received individual speed and all individual speeds previously registered by each sensor node are checked and the newest driving speed is the lowest. To create, The individual appropriate speeds are stored in a plurality of ranges related to predetermined visibility distances and speeds corresponding to respective ranges of the visibility distances. And a transmission threshold condition relating to the visibility distance for transmitting the individual specific speed from the sensor node to the continued continuity generation unit is set and stored. In the method for generating the driving continuity according to the change of the viewing distance based on the ubiquitous sensor network (USN), The sensor node measures the visibility distance and transmits the individual speed determined based on the measured visibility distance to the continuity generator. Comparing the obtained individual constant speed with a previously stored relatively constant speed and transmitting the obtained individual constant speed when the individual speed is not equal to the relatively constant speed; The driving continuity generation unit generates a continuity driven based on the individual specific speed received from the Compares whether the received individual speed is different from the current driving continuity registered, If the received individual speed is lower, the received individual speed is generated as a new driving continuity, If the received individual speed is higher, it includes two steps of checking the received individual speed and all individual speeds previously received and registered, and generating the lowest individual speed as the new driving continuity. , The individual appropriate speeds are stored in a plurality of ranges related to predetermined visibility distances and speeds corresponding to respective ranges of the visibility distances. And a transmission threshold condition relating to the visibility distance for transmitting the individual specific speed from the sensor node to the traveling continuity generation unit is set and stored. delete

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