KR101960428B1 - System and method for providing road state information using mobile terminal apparatus, and a recording medium having computer readable program for executing the method - Google Patents

Abstract

Disclosed are a system for providing road state information and a method thereof, and a recording medium having a computer readable program for executing the method. The system for providing road state information comprises: a location information acquisition unit using a mobile terminal, which is installed on a car driving on a road, to acquire location information of the mobile terminal; a car speed calculation unit identifying the road and calculating the speed of the car from the acquired location information; a curve radius calculation unit using the location information to calculate a curve radius on a preset section of the road; and a curve radius determination unit using a corresponding relation of the speed of the car and the curve radius to determine appropriateness of the curve radius.

Description

TECHNICAL FIELD [0001] The present invention relates to a system and method for providing road state information using a mobile terminal, and a computer-readable recording medium storing the computer readable program for executing the method. BACKGROUND OF THE INVENTION 1. Field of the Invention EXECUTING THE METHOD}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system and method for providing state information of civil engineering and building structures, and more particularly, to a system and method for acquiring and analyzing information necessary for road maintenance for safe and comfortable running of a vehicle will be.

With the increase in the number of vehicles, the road for the passage of the vehicles is also rapidly increasing. However, as with other structures, roads are aged with the passage of time, so that the comfort that the driver feels in a traveling vehicle decreases with time as well as decreases in safety.

In addition, even when the road itself is not obsolete, when the traffic conditions on the road are different from those expected in the past along with the passage of time, the inconvenience felt in the traveling vehicle increases and the safety of the traveling vehicle is also threatened.

A typical example of the deterioration of the road itself is a decrease in road flatness due to damage to the road pavement. Examples of changes in the traffic situation include a curve radius of the road, This is a phenomenon in which there is a significant difference compared to the design time.

In order to solve such problems, it is necessary to continuously collect information on the flatness of the road and the linearity of the road, and to reflect the collected information on the road maintenance.

However, in order to obtain the information about the current road flatness or the planar linearity, the direct surveyor must acquire the flatness of the road surface or the road linear information directly in the field. In this case, the inconvenience and cost increase The safety of the surveyor can be threatened.

KR 101386074 B1

SUMMARY OF THE INVENTION It is an object of the present invention to provide a system and a method for quickly and easily providing road state information such as road surface linear information and flatness information.

In order to achieve the above object, a road state information providing system according to the present invention includes a position information obtaining unit, a vehicle speed calculating unit, a curve radius calculating unit, and a curve radius determining unit.

The position information obtaining unit obtains the position information of the mobile terminal using the mobile terminal mounted on the vehicle running on the road. The vehicle speed calculating unit performs the identification of the road and the speed calculation of the vehicle from the obtained position information, The calculating unit calculates the radius of curvature for a predetermined section of the road using the obtained position information, and the radius determining unit determines the adequacy of the radius of curvature by using the corresponding relationship between the velocity of the vehicle and the calculated radius of curvature.

According to such a configuration, by calculating the radius of curvature of the running section as well as the identification of the road on which the vehicle is running by using the position information of the vehicle measured in real time using the mobile terminal held by most vehicle occupants, It is possible to provide a judgment as to the adequacy of the road surface linearity corresponding to the current vehicle speed as well as the planar linear information of the road in an easy and near real time since the separate action for measuring the linear information is not required.

The road surface information providing system includes an acceleration information obtaining unit that obtains gravity acceleration information of the mobile terminal using the mobile terminal, a road surface flatness calculating unit that calculates road surface flatness for a plurality of roads using the gravity acceleration information, And a road surface flatness judging unit for judging the adequacy of the road surface flatness against a plurality of roads by comparing the road surface flatness with a preset reference. According to this configuration, it is possible to provide not only the information about the flatness of the road, but also the judgment about the appropriateness thereof by using the information measured through the mobile terminal.

At this time, if the radius of curvature is smaller than the preset reference, the section of the road can be set as the road linear improvement fine inspection section. According to such a configuration, it is possible to carry out a precise survey for improving the road linearity in a section in which the road plane linearity is remarkably inadequate.

In addition, the precise irradiation section setting section may set the road section as the road surface packaging state precise irradiation section when the area where the road surface flatness is poor in the road section is equal to or larger than a preset ratio of the entire section. According to such a configuration, it is possible to carry out a close inspection of the road surface packaging condition for a section in which the road surface roughness is remarkably inadequate

To this end, the road surface flatness calculating unit includes an RMS value calculating unit for calculating RMS (Root Mean Square) values of gravity acceleration measured for a plurality of sections of the road, an RMS value calculating unit for calculating RMS A maximum absolute value calculation unit for calculating an RMS value of a gravitational acceleration and a maximum absolute value within an area for each of a plurality of areas of the selected section, and a maximum absolute value calculation unit for calculating a maximum absolute value by dividing a maximum absolute value by an RMS value And a CF value calculating unit for calculating a CF (Crest Factor) value.

In addition, an invention in which the system is implemented in the form of a method and a recording medium recording a computer-readable program for executing the method are disclosed.

According to the present invention, by calculating the radius of curvature of the running section as well as the identification of the road on which the vehicle is running, by using the position information of the vehicle measured in real time using the mobile terminal held by most vehicle occupants, It is possible to provide a judgment as to the adequacy of the road surface linearity corresponding to the current vehicle speed as well as the planar linear information of the road in an easy and near real time.

Also, it is possible to provide not only information about the flatness of the road, but also a judgment about the appropriateness thereof by using the information measured through the mobile terminal.

In addition, it is possible to carry out a precise survey for the improvement of the road linearity in a section where the road plane linearity is remarkably inadequate.

In addition, it is possible to carry out a close inspection of the road surface packaging condition for sections in which the road surface roughness is remarkably inadequate

1 is a schematic block diagram of a road state information providing system according to an embodiment of the present invention;
2 is an example of a screen output to a mobile terminal for user's operation input;
3 is a table showing an example of data classification performed in the server.
Fig. 4 schematically illustrates the process of filtering GPS data, to calculate the curve radius; Fig.
FIG. 5 is a diagram illustrating an example of calculating the RMS per section in units of 100m for the planarity analysis of the road surface. FIG.
FIG. 6 is a diagram illustrating an example of calculating a PEAK value in units of 10m in a defective section of the section shown in FIG. 5; FIG.
FIG. 7 is a schematic flow chart for performing a road state information providing method according to an embodiment of the present invention; FIG.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a schematic block diagram of a road condition information providing system according to an embodiment of the present invention. 1, the road state information providing system 100 includes a position information obtaining unit 110, a vehicle speed calculating unit 120, a curve radius calculating unit 130, a curve radius determining unit 140, an acceleration information obtaining unit 150, a road surface flatness calculating unit 160, a road surface flatness determining unit 170, and a precise irradiation interval setting unit 180.

The road surface flatness calculating section 160 further includes an RMS value calculating section 162, a section selecting section 164, a maximum absolute value calculating section 166 and a CF value calculating section 168.

In FIG. 1, each component of the road condition information providing system may be implemented by hardware alone, but it may be more common that the components are implemented together with hardware and hardware running on hardware.

The location information obtaining unit 110 obtains the location information of the mobile terminal using the mobile terminal mounted on the vehicle that is running on the road. The acceleration information acquisition unit 150 acquires the gravitational acceleration information of the mobile terminal using the mobile terminal.

The mobile terminal refers to a smart phone or similar data collection device, and can record time, GPS information, gravitational acceleration, and noise (a collection device for vehicle installation) in a mobile terminal.

Acquisition of the necessary information can be performed by the application program for the mobile device, wherein the collection information application acquires the user's consent from the mobile device and records and records information during operation through the start and end of the collection item The collected data may be transmitted.

2 is an example of a screen output to the mobile terminal for user's operation input. As shown in FIG. 2, the user collects data using the 'Start Survey' / 'End Survey' buttons during running through a road driving environment survey application, Location information), and gravitational acceleration (G sensor).

The collected data is transmitted to the central server through the application 's "data transfer" function and stored. The data can be classified according to the following criteria. 3 is a table showing an example of data classification performed in the server.

The vehicle speed calculation unit 120 identifies the road from the obtained position information and calculates the speed of the vehicle. The basic data is analyzed through the analysis of the collected data. More specifically, the road name, the traveling direction, the viewpoint, the end point, and the traveling speed of the survey section are calculated.

In this case, the traveling speed is calculated by dividing the traveling distance by the traveling time, calculating the average traveling speed by weighted averaging of a plurality of traveling speed data, determining the examination time of the collected data, and calculating the average traveling speed by time .

The curve radius calculation unit 130 calculates a curve radius for a predetermined section of the road using the positional information, and the curve radius determination unit 140 calculates a curve radius of the road using the corresponding relation between the vehicle speed and the curve radius, .

(Curve radius) is calculated by using the travel time, GPS information, and the radius of curvature (R) of the running route using the GPS information, .

GPS data is taken such that the position coordinate distance of the point of departure is at least the measurement minimum distance M and the curve radius is obtained from the GPS coordinates by means of the Least-Squares Circle fit and the average travel speed of the route or section is taken into account Judge the appropriateness (Good, Not Good) of the curve radius that meets the design criteria.

At this time, only the data obtained by filtering the GPS data so that the HDOP (Horizontal Dilution Of Precision) is smaller than the previously set horizontal positioning result accuracy constant (K) have. 4 is a diagram schematically showing a process of filtering GPS data to calculate a curve radius.

The road surface flatness calculating unit 160 calculates road surface flatness for a plurality of road sections using the gravitational acceleration information. More specifically, the RMS, PEAK, and CF values are calculated based on the G-sensor data base signal.

Here, the Root Mean Square (RMS) value is an effective value of the vibration data, and represents the overall vibration magnitude of the corresponding section. The PEAK value is the largest value among the absolute values of the signal and the Cr (Crest Factor) value is the crest factor of the corresponding section, which is the value obtained by dividing the PEAK value by the RMS and indicating how the impact caused by the unevenness is included.

To this end, the RMS value calculator 162 calculates the RMS (Root Mean Square) value of the measured gravity acceleration for a plurality of sections of the road, and the section selector 164 selects one of the RMS The maximum absolute value calculation unit 166 calculates the RMS value of the gravitational acceleration and the maximum absolute value within the area for a plurality of areas of the selected section, 168) calculates a CF (Crest Factor) value obtained by dividing the maximum absolute value by the RMS value for each region.

This is a structure for analyzing the level of flatness using the data of the G-sensor and the survey time of the collected data. More specifically, it means calculating the degree of running smoothness of the road using the G-sensor analysis data.

The analysis process includes data collection in the homogeneity section, RMS calculation for each section in 100m steps, RMS category setting and failure section derivation, PEAK value 10m in the bad section, calculation of CF value for every 10m unit, CF category setting, And a derivation process.

FIG. 5 is a diagram illustrating an example of calculating RMS per section in units of 100m for the analysis of the road surface flatness, and FIG. 6 is a diagram illustrating an example of calculating a PEAK value in units of 10m in a bad section for flatness analysis of the road surface. FIG. 6 shows the 200 to 300 m section of FIG. 5 in units of 10 meters.

The road surface flatness determining unit 170 compares the calculated road surface flatness with a preset reference to determine the adequacy of the road surface flatness against a plurality of roads. The preset reference may be determined as a flatness defect period if the CF (Crest Factor) value is above a certain level (e.g., CF> 5.00) as a reference preset by the system manufacturer or the administrator.

If the radius of curvature is smaller than the preset reference, the precise irradiation section setting unit 180 may set the section of the road as the road linear improved fine irradiation section.

In addition, the precise irradiation section setting unit 180 may set the road section as a precise irradiation period of the road surface packaged state when the area where the road surface flatness is poor is equal to or larger than a preset ratio of the entire section.

According to such a configuration, it is possible to reduce the time and cost required for the road maintenance management of the public agency by securing the basic data of the road maintenance management.

FIG. 7 is a schematic flowchart for performing a road state information providing method according to an embodiment of the present invention.

First, time, GPS information, gravitational acceleration, noise (a collection device for stationary vehicles), and the like are recorded in a mobile device or a vehicle mount collecting device (S110). More specifically, the collection information application of the mobile device obtains the user's consent from the mobile device, records information during operation through the start and end of the collection item, and transmits the collected collection data to the central server.

Then, in the server, the collected time, position, gravitational acceleration, and noise amount data are quantified, and the traveling speed, the geometry (road alignment), the flatness, and the noise amount are analyzed using S120.

Finally, the analyzed data is provided in the form of an analysis result query, a planar linear improvement interval presentation, a flatness improvement interval presentation, and a precise irradiation interval presentation (S130).

More specifically, the analysis results of the collected data can be presented by dividing into 'presentation of basic analysis results', 'presentation of safety improvement section', 'presentation of flatness improvement section', and 'close inspection section presentation'.

The basic analysis result inquiry is the average traffic speed of the road, the average traffic speed per hour, and the plane linearity (curve radius). G-sensor (R MS, Peak, CF) can be presented. In the safety improvement section, it is possible to present a section corresponding to "NOT Good" as a result of judging the adequacy of the curve radius that meets the design criteria in consideration of the average traveling speed of the route or section.

If the CF (Crest Factor) value is above a certain level (eg, CF> 5.00) as a result of the G-sensor data analysis of the corresponding section, the flatness improvement section may be presented as a flatness defect section. For the presentation of the inspection area, it is possible to present the inspection area in consideration of the safety improvement section and the flatness improvement section.

If the curve radius is smaller than the traveling speed, the planar advance improvement section presentation can be presented as a section requiring a linear improvement improvement check. The package status survey section may suggest that if the flatness defect section occupies more than 30% of the route section, the package status investigation for the same route may be carried out.

Although the present invention has been described in terms of some preferred embodiments, the scope of the present invention should not be limited thereby but should be modified and improved in accordance with the above-described embodiments.

100: Road condition information providing system
110: Position information obtaining unit
120: vehicle speed calculating unit
130: Curve radius calculation unit
140: Curve radius determination unit
150: Acceleration information acquisition unit
160: road surface flatness calculating section
162: RMS value calculating section
164:
166: maximum absolute value calculating unit
168: CF value calculating unit
170: Surface planarity judging unit
180: Close inspection section setting section

Claims (11)

A location information obtaining unit for obtaining location information of the mobile terminal using a mobile terminal mounted on a plurality of vehicles traveling on a road;
A vehicle speed calculation unit that identifies the road from the positional information and calculates an average traveling speed of the vehicles by weighted average of the traveling speeds of the vehicles;
A curve radius calculation unit for calculating a curve radius for a predetermined section of the road using the position information; And
And a curve radius determination unit for determining the adequacy of the curve radius using a corresponding relationship between the average traveling speed and the curve radius.
The method according to claim 1,
An acceleration information acquiring unit for acquiring gravity acceleration information of the mobile terminal using the mobile terminal;
A road surface flatness calculating unit for calculating a road surface flatness with respect to a plurality of sections of the road using the gravitational acceleration information; And
Further comprising a road surface flatness determining unit for comparing the road surface flatness with a predetermined reference to determine the adequacy of road surface flatness with respect to a plurality of roads.
The method of claim 2,
Further comprising a precise irradiation interval setting unit for setting the interval of the road as a road linear improved fine irradiation interval when the curve radius is smaller than a preset reference value with respect to the average traveling speed.
The method of claim 3,
Wherein the precise irradiation section setting section sets the road section as a road surface packaged state precise irradiation section when the area of the road with poor road surface flatness is greater than or equal to a predetermined ratio of the entire section.
The method of claim 2,
The road surface flatness calculating unit calculates,
An RMS value calculation unit for calculating RMS (Root Mean Square) values of gravity acceleration measured for a plurality of sections of the road;
A section selector for selecting a section of the road in which the RMS value is greater than a preset reference;
A maximum absolute value calculation unit for calculating an RMS value of the gravity acceleration and a maximum absolute value within the area for a plurality of areas of the selected section; And
And a CF value calculating unit for calculating a CF (Crest Factor) value obtained by dividing the maximum absolute value by the RMS value for each of the areas.
A road condition information providing system,
A position information measuring step of measuring position information of the mobile terminal using a mobile terminal mounted on a plurality of vehicles running on the road;
A vehicle speed calculating step of identifying the road from the positional information and calculating an average traveling speed of the vehicles by weighted average of the traveling speeds of the vehicles;
A curve radius calculating step of calculating a curve radius with respect to a predetermined section of the road using the position information; And
And a curve radius determining step of determining the adequacy of the curve radius using the correspondence relation between the average traveling speed of the vehicles and the curve radius.
The method of claim 6,
Measuring gravitational acceleration information of the mobile terminal using the mobile terminal;
A road surface flatness calculating step of calculating a road surface flatness with respect to a plurality of sections of the road using the gravitational acceleration information; And
Further comprising a road surface flatness determining step of comparing the road surface flatness with a preset reference to determine the adequacy of the road surface flatness with respect to a plurality of sections of the road.
The method of claim 7,
And setting a road section as a road linear improvement fine inspection section when the curve radius is smaller than a predetermined reference with respect to the average traffic speed.
The method of claim 8,
The fine inspection interval setting step includes:
Wherein the road section is set as a road surface packaged state precision inspection section when the road surface flatness is poor in the road section, and the road section is set as a road surface packaged state precision inspection section.
The method of claim 7,
In the road surface flatness calculating step,
An RMS value calculating step of calculating RMS (Root Mean Square) values of gravity acceleration measured for a plurality of sections of the road;
A section selecting step of selecting a section of the road in which the RMS value is larger than a preset reference;
A maximum absolute value calculation step of calculating an RMS value and a maximum absolute value within the area of each of the plurality of areas of the selected section; And
And a CF value calculating step of calculating a CF (Crest Factor) value obtained by dividing the maximum absolute value by the RMS value for each of the areas.
A recording medium on which a computer-readable program for executing the method of any one of claims 6 to 10 is recorded.

Images