KR20200048022A - System for Calculating Traffic Information using Vehicle Driving Noise and Method Thereof - Google Patents

Abstract

According to one aspect of the present invention, provided is a traffic information calculation system utilizing vehicle driving noise, which comprises: a vibration measurement unit installed on the road to measure the vibration of a vehicle; a noise measurement unit provided on a side surface of the road to measure noise of the vehicle; and a control unit operating information of the vehicle measured by the vibration measurement unit and the noise measurement unit.

Description

System for calculating traffic information using vehicle driving noise and method thereof

The present invention relates to a traffic information calculation system and method utilizing vehicle driving noise, and more specifically, overcomes the disadvantages of traffic detectors currently being installed and installed on the road, and normally functions as a general traffic information collection function while simultaneously driving the road surface state. It relates to a traffic information calculation system and method using the vehicle driving noise that can detect.

Conventional traffic detectors installed on roads are equipped with a detection method through image processing using images, cameras, etc., or a piezo (piezoelectric) sensor is embedded in a road pavement, and the vehicle weight is directly applied to the sensor through the wheels of the passing vehicle. In most cases, the method of collecting or burying the roof coil on the road detects the existence and speed of the vehicle by detecting the change (inductance) of the magnetic field whenever the vehicle, which is a metal object, passes.

However, these detection systems have the following unavoidable problems depending on the characteristics of the detection element. First, because the image detector uses a shooting element such as a camera, there is a detection error due to a shadow of a vehicle or a time zone during which light intensity changes during the day, such as sunrise and sunset time. In the case of direct vehicle tire contact, there are limitations in durability, failure due to road breakage, and the detection sensor interlocks with the road pavement. have.

In addition, research is being conducted using video cameras to detect pavement conditions and portholes, but it is not possible to properly detect portholes in complex environments such as portholes overlapping with shadows or the inside shape of portholes having a shape similar to the surrounding road surface. It has problems and limitations.

The present invention has been devised to solve the above problems, and an object of the present invention is to utilize a vehicle driving noise that can calculate the vehicle speed by measuring the vibration of the road generated by the vehicle driving the road. It is to provide an information calculation system and method.

Another object of the present invention is to provide a system and method for calculating traffic information using vehicle driving noise that can determine abnormalities such as portholes on a road by measuring vehicle driving noise.

A traffic information calculation system utilizing a vehicle driving noise according to an aspect of the present invention for achieving the above object is installed on the road and measures the vibration of the vehicle, and is provided on the side of the road to provide the vehicle It may include a noise measuring unit for measuring the noise, and the vibration measuring unit and a control unit for calculating the information of the vehicle measured by the noise measuring unit.

The vibration measuring unit may include a plurality of irregularities that are inserted at intervals smaller than the axial distance of the vehicle by cutting the road, and a vibration sensor that is provided between the plurality of irregularities and inserted into the road.

The unevenness may be formed in a 'ㅗ' or 'ㅜ' shape so as not to be affected by the driving of the vehicle.

The vibration sensor may measure the vibration of the road generated in the irregularities as the vehicle travels.

The noise measuring unit may be provided with a cradle fixed to the side of the road and extending upwards, and a noise sensor for measuring noise of the vehicle as it is provided at the top of the cradle.

The control unit may include a communication unit receiving vibration and noise from the vibration measurement unit and the noise measurement unit, a collection unit collecting vibration and noise received from the communication unit, and a road condition using the information collected by the collection unit. It may be provided with a calculation unit for calculating the traffic information.

In addition, the traffic information calculation method using the vehicle driving noise according to another aspect of the present invention for achieving the above object is (a) measuring the road surface shock generated by the vehicle driving the road in the vibration measuring unit ; (b) measuring the noise of the vehicle in a noise measuring unit; (c) matching vibration and noise generated by the vehicle at a control unit; And (d) calculating traffic information of the road by vibration and noise. It may include.

The controller may determine that a porthole has occurred on the road when the road surface shock generated by the vehicle is unspecified.

The vibration measuring unit may include a plurality of irregularities that are inserted at intervals smaller than the axial distance of the vehicle by cutting the road, and a vibration sensor that is provided between the plurality of irregularities and inserted into the road.

The unevenness may be formed in a 'ㅗ' or 'ㅜ' shape so as not to be affected by the driving of the vehicle.

The vibration sensor may measure the vibration of the road generated in the irregularities as the vehicle travels.

The noise measuring unit may be provided with a cradle fixed to the side of the road and extending upward, and a noise sensor for measuring noise of the vehicle as it is provided at the top of the cradle.

The control unit may include a communication unit receiving vibration and noise from the vibration measurement unit and the noise measurement unit, a collection unit collecting vibration and noise received from the communication unit, and a road condition using the information collected by the collection unit. It may be provided with a calculation unit for calculating the traffic information.

According to the traffic information calculation system and method using the vehicle driving noise according to the present invention, it is possible to measure the vibration of a road generated by a vehicle passing through the irregularities by providing an irregularity and a vibration sensor on the road.

And, it is equipped with a noise sensor on the side of the road to measure the noise of the vehicle.

1 to 3 is a conceptual diagram showing a traffic information calculation system using the vehicle driving noise according to an embodiment of the present invention.
4 to 5 is an exemplary view showing a state of calculating the vehicle and road information from the control unit according to an embodiment of the present invention.
6 is a flowchart illustrating a state in which a traffic information calculation method using vehicle driving noise is installed according to another embodiment of the present invention.

Hereinafter, a system and method for calculating traffic information using vehicle driving noise according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 are conceptual views illustrating a traffic information calculation system using vehicle driving noise according to an embodiment of the present invention.

1 to 3, the traffic information calculation system using the vehicle driving noise according to an embodiment of the present invention is installed on the road 10, a vibration measuring unit for measuring the vibration of the vehicle 20 ( 100), provided on the side of the road 10, the noise measurement unit 200 for measuring the noise of the vehicle 20, and the vibration measurement unit 100 and the noise measurement unit 200 measured A control unit 300 for calculating the information of the vehicle 20 may be provided.

The traffic information calculation system using the vehicle driving noise of the present invention overcomes the shortcomings of the traffic detectors currently being installed and installed on the road 10, and normally detects the road condition of the road 10 while simultaneously collecting general traffic information. You can.

The vibration measuring unit 100, the vibration measuring unit 100 is a plurality of irregularities 110 and a plurality of irregularities 110 that are inserted at intervals smaller than the axial distance of the vehicle 20 by cutting the road 10 It is provided between (110), it may be provided with a vibration sensor 120 is inserted into the road (10).

The irregularities 110 may be installed in two or more in a 'ㅗ' or 'ㅜ' shape so as not to be affected by the driving of the vehicle 20 by cutting one side of the road 10 for collecting traffic and speed. These irregularities 110 may measure vibrations generated on the road 10 by the vibration sensor 120 as the vehicle 20 passes, generating vibration, shock, and sound signals.

As two or more of the irregularities 110 are provided, a vibration sensor 120 is provided between the irregularities 110 to more effectively measure vibrations of the road 10.

In addition, the unevenness 110 is a vehicle having a minimum inter-axle distance 20 (for example: the shortest inter-vehicle distance 20) so that the impact noises of the front and rear wheels of the vehicle 20 do not overlap or the sequence is reversed. It is designed at intervals of about 2m below the interaxial distance of) An example of signal collection is as follows.

The vibration sensor 120 prevents damage as it is provided on the side of the road 10 so that the vehicle 20 does not directly step on it, and measures vibration generated by the unevenness 110.

The noise measurement unit 200 may measure the noise generated by the vehicle 20 passing through the unevenness 110 as it is provided on the road surface that is the side surface of the road 10. The noise measuring unit 200 is fixed to the side of the road 10 and extends to the top 210, and is provided at the top of the mount 210 to measure the noise of the vehicle 20 A noise sensor 220 may be provided.

The cradle 210 may be fixed to the road surface of the road 10 and is formed to extend upward. In addition, the cradle 210 may measure noise generated when the vehicle 20 driving on the road 10 passes through the unevenness 110 as it is provided at a position where the unevenness 110 is provided.

The height of the cradle 210 may be variously formed according to the width of the road 10, and the range of noise measured by the noise sensor 220 may be limited according to the height of the cradle 210.

The noise sensor 220 is fixed to the top of the cradle 210 to measure the noise of the vehicle 20, the vehicle 20 is generated in the noise and road 10 through the irregularities 110 The noise generated by the vehicle 20 can be identified by the porthole.

For example, when the vehicle 20 generates noise while driving, unlike the noise when passing through the unevenness 110, it may be determined that an abnormality has occurred in the road 10 such as a porthole.

The control unit 300 includes a communication unit 310 that receives vibration and noise from the vibration measurement unit 100 and the noise measurement unit 200, and a collection unit that collects vibration and noise received from the communication unit 310. 320 and a calculation unit 330 for calculating the state and traffic information of the road 10 by using the information collected by the collection unit 320.

The communication unit 310 is a vehicle 20 measured by the vibration and noise measurement unit 200 of the road 10 generated by the vehicle 20 passing through the irregularities 110 measured by the vibration measurement unit 100 The noise generated when passing through the unevenness 110 may be received and collected by the collection unit 320.

The calculation unit 330 may calculate the speed of the vehicle 20 and the state of the road 10 by vibration and noise of the road 10 collected by the collection unit 320.

At this time, when the speed of the vehicle 20 is calculated by the calculation unit 330, the speed of the vehicle 20 may be calculated by the vibration sensor 120, and the vehicle 20 may be controlled by the controller 300. ) In order to measure the speed, two or more irregularities 110 are installed, but for measuring the speed of the vehicle 20, the irregularities 110 are arranged so that the distance between the vibration sensors 120 and the irregularities 110 is an arbitrary distance L.

And when the vehicle 20 passes by arranging two or more N of the irregularities 110 and any vehicle 20 passes through the N of the irregularities 110, the speed calculation method of the individual vehicle 20 is The speed between each unevenness 110 is calculated by utilizing the difference in the travel time of the vibration peak value generated in the adjacent unevenness 110. It is possible to determine the speed of the final individual vehicle 20 k through the arithmetic mean for the remaining speeds except for the case where the maximum deviation of the values of the speeds collected by the vibrations generated between the irregularities 110 is severe.

If this is described in detail, the speed of the unevenness 110 N can be calculated by [Equation 1].

Here, the unit of time is sec (sec), and the speed of the corresponding vehicle 20 is calculated in the same manner as [Equation 2] and [Equation 3] when N is four.

Therefore, since most of the existing detectors calculate speed using two points in speed detection, even if an error speed value due to a malfunction of the sensor is displayed, the value is displayed as it is. Since several speed values come from, it is determined by comparing with other speed values in the section, so a reliable speed value can be obtained.

In addition, in calculating the occupied time of the vehicle 20 and the length of the vehicle 20, the definition of the occupied time of the vehicle 20 is defined as the time when the vehicle 20 is present on the detection area of the detector.

이고 이는 [수학식 4]과 같이 표현할 수 있다.Here, the time difference between the first unevenness 110 and the last unevenness 110 n among the unevenness 110 arranged. Therefore, the occupancy time of the vehicle 20 is

And this can be expressed as [Equation 4].

이후까지 이다. This occupancy time is the time when the vehicle 20 is present in the unevenness 110 section, where the vehicle 20 finally leaves the detector.

Until after.

:cm단위)는 [수학식 5]와 [수학식 6]과 같이 산출된다.Therefore, the vehicle 20 length (

: cm unit) is calculated as [Equation 5] and [Equation 6].

Here, the unit occupied by Occ is sec (sec).

And referring to Figures 4 to 5, the vibration value and the noise measurement unit 200 of the road 10 that occurs when the vehicle 20 measured by the vibration measuring unit 100 penetrates the unevenness 110 It is possible to calculate traffic collection and information by merging and recognizing noise signals generated by passing one vehicle 20 into one vehicle 20.

For example, in the case of a passenger car passing through, the vehicle 20 wheels pass through the unevenness 110, and four signals generated by the vibration and one noise signal in the form of a normal distribution obtained from the roadside are used as one vehicle 20. It can be measured separately.

However, if there is an abnormality in the pavement condition such as cracks and portholes occurring in the detection area of the vibration sensor 120 buried in the road 10, as shown in the following figure, collect the signal including the abnormal signal. It determines the magnitude, occurrence time, duration, etc. of this signal, compares it with the vibration and noise collection under normal conditions, determines the abnormality of the pavement, and delivers it to the road 10 manager.

Hereinafter, in describing a method for calculating traffic information using vehicle driving noise according to another embodiment of the present invention, the same reference numbers are used for the same configuration as the traffic information calculating system using vehicle driving noise according to the above-described embodiment. And detailed description thereof will be omitted.

6 is a flowchart illustrating a state in which a traffic information calculation method using vehicle driving noise is installed according to another embodiment of the present invention.

Step S1100 may input a road surface shock generated by the vehicle 20 penetrating the unevenness 110 installed on the road surface.

At this time, if it is determined in step S1200 that the unevenness 110 vibration has occurred, it is determined as an arbitrary signal in step S2200, and when the vibration is measured without the unevenness 110 vibration, it is determined as an unspecified signal in step S1300.

In step S1400, when the vibration is determined to be an unspecified signal instead of the unevenness 110, the time point of the road impact is determined, and in step S1500, the location and occurrence information of the road impact is notified to the road 10 manager in step S1600. Can transmit.

Thus, the manager of the road 10 may perform maintenance according to determining an abnormality such as a porthole of the road 10.

And in step S2200, when it is determined that the unevenness 110 vibration is correct, the noise of the vehicle 20 driving on the road surface may be input in step S2100 together.

In step S2300, noise signals measured by the unevenness 110 vibration and the noise sensor 220 may be matched.

 In step S2400, the vehicle 20 data such as traffic volume, speed, and occupancy time may be calculated in the same manner as calculated by the control unit 300 by utilizing information in which the unevenness 110 vibration and noise signals are combined.

In addition, in step S2500, the information calculated in step S2400 may be used to store it as a DB or to determine it as an arbitrary signal in step S3100.

In the above, a system and method for calculating traffic information using vehicle driving noise according to an embodiment of the present invention has been described, but the spirit of the present invention is not limited to the embodiments presented herein. And, those skilled in the art who understand the spirit of the present invention can easily propose other embodiments by adding, changing, deleting, adding, or the like components within the scope of the same spirit, but also within the scope of the present invention. It will be said.

10: road 20: vehicle
100: vibration measuring unit 110: irregularities
120: vibration sensor 200: noise measurement unit
210: cradle 220: noise sensor
300: control unit 310: communication unit
320: collection unit 330: calculation unit

Claims (13)

Vibration measurement unit installed on the road to measure the vibration of the vehicle,
A noise measurement unit provided on a side of the road to measure noise of the vehicle,
A traffic information calculation system using vehicle driving noise, including a control unit for calculating information of the vehicle measured by the vibration measuring unit and the noise measuring unit.
According to claim 1,
The vibration measuring unit cuts off the road and inserts a plurality of irregularities inserted at intervals smaller than the axial distance of the vehicle,
A traffic information calculation system utilizing vehicle driving noise, which is provided between a plurality of the irregularities and includes a vibration sensor inserted into the road.
According to claim 2,
The unevenness is a traffic information calculation system using vehicle driving noise, characterized in that it is formed in a 'ㅗ' or 'ㅜ' shape so as not to be affected by the driving of the vehicle.
According to claim 3,
The vibration sensor is a vehicle traffic information calculation system using the vehicle driving noise, characterized in that to measure the vibration of the road generated in the irregularities as the vehicle travels.
According to claim 1,
The noise measurement unit is fixed to the side of the road and extends to the top,
Traffic information calculation system using the vehicle driving noise, characterized in that provided with a noise sensor for measuring the noise of the vehicle as provided on the top of the cradle.
According to claim 1,
The control unit includes a communication unit that receives vibration and noise from the vibration measurement unit and the noise measurement unit,
And a collection unit for collecting the vibration and noise received from the communication unit,
Traffic information calculation system using the vehicle driving noise, characterized in that it comprises a calculation unit for calculating the road condition and traffic information by using the information collected by the collection unit.
(A) measuring the road surface shock generated by the vehicle driving the road in the vibration measuring unit;
(b) measuring the noise of the vehicle in a noise measuring unit;
(c) matching vibration and noise generated by the vehicle at a control unit; And
(d) calculating traffic information of the road by vibration and noise;
Road maintenance information sharing method using a business vehicle comprising a.
The method of claim 7,
The controller is a road maintenance information sharing method using a business vehicle, characterized in that if the road surface generated by the vehicle is unspecified, a porthole has occurred on the road.
The method of claim 7,
The vibration measuring unit cuts off the road and inserts a plurality of irregularities inserted at intervals smaller than the axial distance of the vehicle,
A traffic information calculation system utilizing vehicle driving noise, which is provided between a plurality of the irregularities and includes a vibration sensor inserted into the road.
The method of claim 9,
The unevenness is a traffic information calculation system using vehicle driving noise, characterized in that it is formed in a 'ㅗ' or 'ㅜ' shape so as not to be affected by the driving of the vehicle.
The method of claim 10,
The vibration sensor is a vehicle traffic information calculation system using the vehicle driving noise, characterized in that to measure the vibration of the road generated in the irregularities as the vehicle travels.
The method of claim 7,
The noise measurement unit is fixed to the side of the road and extends to the top,
Traffic information calculation system using the vehicle driving noise, characterized in that provided with a noise sensor for measuring the noise of the vehicle as provided on the top of the cradle.
The method of claim 7,
The control unit includes a communication unit that receives vibration and noise from the vibration measurement unit and the noise measurement unit,
And a collection unit for collecting the vibration and noise received from the communication unit,
Traffic information calculation system using the vehicle driving noise, characterized in that it comprises a calculation unit for calculating the road condition and traffic information by using the information collected by the collection unit.

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