KR20230065491A - Apparatus and method for calculating traffic information through radar and loop detection complex sensing - Google Patents

Abstract

An objective of the present invention is to accurately acquire passing information on a road by using a radar method and a loop detection method in a composite manner. According to one embodiment of the present invention, an apparatus for calculating traffic information to acquire traffic information on a road comprises: a radar part transmitting a radio wave in a prescribed area on the road, and receiving a radio wave reflected from a target; a loop part installed on the prescribed area on the road to sense the passing time and passing status of the target; and a control part acquiring passing information of the prescribed area of the target based on information on the target inputted through the radar part and the loop part, and acquiring the traffic information on the road based on the passing information. The passing time is the time from when the target enters the loop part to when the target leaves the loop part. The passing information includes at least one among driving information and speed information of the target in the prescribed area and length information of the target.

Description

Apparatus and method for calculating traffic information through radar and loop detection composite sensing {APPARATUS AND METHOD FOR CALCULATING TRAFFIC INFORMATION THROUGH RADAR AND LOOP DETECTION COMPLEX SENSING}

The present invention relates to an apparatus and method for calculating traffic information through combined sensing of radar and loop detection, and more particularly, to a convergence of a radar apparatus and a loop detection apparatus in order to obtain traffic information such as average speed or traffic volume information on a road. It relates to a device and method for calculating traffic information using

Recently, services that provide traffic information to drivers, such as navigation and real-time traffic information display boards, are increasing significantly, and many ways to utilize traffic information through data collection through traffic detection devices are being prepared, but they are insufficient to receive accurate traffic information data. The situation is.

Accordingly, in recent years, traffic information on the road is grasped through a traffic information measuring device using a radar method or a traffic information measuring device using a loop detector to grasp traffic information on the road, but in the case of the radar method, noise and measurement of weather conditions, etc. Inaccurate data is obtained due to limitations of the method, and in the case of a loop detector using two loops, speed information can be obtained relatively accurately, but the vehicle must proceed as intended at the time of installation of the loop detector on the loop detector is still unable to obtain accurate traffic information.

Accordingly, the demand for accurate traffic information measurement and data is increasing day by day in improving the quality of traffic information provision services and designing applications through traffic information data.

An object of the present application is to accurately obtain passing information on a road by using a combination of a radar method and a loop detection method.

Another object of the present application is to obtain and provide traffic information of a corresponding road based on passage information of an object when an object passes on a road.

According to one embodiment of the present invention, there is provided a traffic information calculation device for acquiring traffic information on a road, comprising: a radar unit that transmits radio waves within a certain area on the road and receives radio waves reflected from an object; a loop unit installed on the predetermined area on the road and detecting whether or not the object passes and a passing time; and a control unit that obtains information about the object passing through the certain area based on information about the object input through the radar unit and the loop unit, and obtains the traffic information on the road based on the passing information. and the passage time is a time from when the object enters the loop to when it leaves, and the passage information includes at least one of travel information, speed information, or length information of the object within a certain area of the object. Including, a traffic information calculation device may be provided.

According to embodiments of the present application, precise speed information and the like of a vehicle passing on a road may be obtained using a radar and a loop detector.

In addition, according to embodiments of the present application, abnormal driving information interfering with data may be excluded by using a combination of a radar and a loop detector.

Also, according to embodiments of the present application, more accurate traffic information may be output or provided to a server.

1 is a schematic diagram illustrating a traffic information calculation device using a combination of radar and loop detection on a road according to an embodiment.
2 is a schematic diagram illustrating a moment when an object moves according to a traveling direction of a road, according to an exemplary embodiment.
3(a) and (b) are graphs illustrating changes in measurands obtained in a first loop and a second loop, respectively, according to an exemplary embodiment.
4 is a schematic diagram showing the configuration of a traffic information calculation device according to an embodiment.
5 and 6 are diagrams illustrating results of detecting a loop portion according to abnormal driving of an object, according to an exemplary embodiment.
7 is a graph showing that a change in a measurement quantity first occurs in an exit loop as an object drives in reverse on a road, according to an embodiment.
8 is a diagram illustrating that an output unit outputs traffic information based on traffic information obtained by a control unit according to an exemplary embodiment.

The foregoing objects, features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. However, the present invention can apply various changes and can have various embodiments. Hereinafter, specific embodiments will be illustrated in the drawings and described in detail.

In the drawings, the thickness of layers and regions is exaggerated for clarity, and elements or layers may be "on" or "on" other elements or layers. What is referred to includes all cases where another layer or other component is intervened in the middle as well as immediately above another component or layer. Like reference numerals designate essentially like elements throughout the specification. In addition, components having the same function within the scope of the same idea appearing in the drawings of each embodiment are described using the same reference numerals.

If it is determined that a detailed description of a known function or configuration related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, numbers (eg, first, second, etc.) used in the description process of this specification are only identifiers for distinguishing one component from another component.

In addition, the suffixes "module" and "unit" for the components used in the following description are given or used together in consideration of ease of writing the specification, and do not have meanings or roles that are distinguished from each other by themselves.

According to one embodiment of the present invention, there is provided a traffic information calculation device for acquiring traffic information on a road, comprising: a radar unit that transmits radio waves within a certain area on the road and receives radio waves reflected from an object; a loop unit installed on the predetermined area on the road and detecting whether or not the object passes and a passing time; and a control unit that obtains information about the object passing through the certain area based on information about the object input through the radar unit and the loop unit, and obtains the traffic information on the road based on the passing information. and the passage time is a time from when the object enters the loop to when it leaves, and the passage information includes at least one of travel information, speed information, or length information of the object within a certain area of the object. Including, a traffic information calculation device may be provided.

According to another embodiment, a traffic information calculation device may be provided that further includes an output device that receives the traffic information from the control unit and outputs the traffic information.

According to another embodiment, the speed information includes radar speed information or loop speed information, and the control unit determines the speed of the object by using time information of radio waves transmitted by the radar unit and time information of radio waves reflected from the object. radar speed information is obtained, and the control unit acquires the loop speed information of the object based on the passage time, and the control unit obtains the passage information when the radar speed information and the loop speed information differ by more than a predetermined range. A traffic information calculation device may be provided that excludes when obtaining the traffic information.

According to another embodiment, the loop unit includes a first loop and a second loop, the first loop is located before the second loop in the traveling direction of the road, and the control unit is the first loop than the first loop. A traffic information calculation device may be provided that excludes the passage information from obtaining the traffic information when first detecting whether or not the object passes in loop 2.

According to another embodiment, the driving information includes information on a direction in which the object travels on the road, and the control unit determines that the driving information of the object acquired through the radar unit is the traveling direction of the road. and when the driving information of the object acquired through the loop unit is in the opposite direction to the driving direction of the road, reverse driving information is included in the traffic information, and the reverse driving information is A traffic information calculation device, which is information traveling in a direction opposite to the direction, may be provided.

According to another embodiment, the traffic information includes average driving speed information on the road or congestion information on the road, and the average driving speed information is obtained through an average of speed information of the object when there are a plurality of objects. and the traffic information calculating device in which the congestion information is obtained based on the average driving speed.

According to another embodiment, the loop unit includes a first loop unit and a second loop unit, and the controller controls the radar unit when the object does not pass through at least one of the first loop unit and the second loop unit. A traffic information calculation device may be provided that excludes the passage information for the target object obtained through the traffic information acquisition process.

According to another embodiment, a traffic information calculating device may be provided in which the length information of the object is obtained based on the speed information and the length information of the loop part.

The present invention relates to a device and method for calculating traffic information through a result complexly detected by a radar and a loop detection device (hereinafter referred to as a loop unit 10).

Hereinafter, traffic information calculation using radar, traffic information calculation using loop detection, and an apparatus and method for calculating traffic information by combining them in a complex manner will be described.

Here, the traffic information is information about the average speed of a plurality of objects 40, such as a vehicle moving on the road 100, congestion information on the road 100, or information on whether there is a vehicle traveling in the opposite direction to the moving direction of the road 100. Information related to traffic that can be obtained on the road 100 may be included.

1 is a schematic diagram illustrating a traffic information calculation device using a combination of radar and loop detection on a road according to an embodiment.

Referring to FIG. 1 , the traffic information calculation device installed on the road 100 may include a control unit 1, a loop unit 10, and a radar unit 30.

Here, the control unit 1, the loop unit 10, and the radar unit 30 may transmit or receive electromagnetic signals wired or wirelessly. In other words, the control unit 1, the loop unit 10 and the radar unit 30 may be electrically coupled.

Here, the roof unit 10 may be installed on the road 100, and in this case, being installed on the road 100 may include being buried under the ground of the road 100.

The loop unit 10 may be configured as a closed circuit. In this case, current according to the application of DC or AC power may flow in the closed circuit, and the current flowing in the closed circuit by electromagnetic induction or the frequency of the current flowing in the case of AC current may be electromagnetically generated. nature can change.

In addition, the loop unit 10 includes a first loop 12, a second loop 14, a third loop 16, a fourth loop 22, a fifth loop 24, a sixth loop 26, and the like. It may include a plurality of loops, and the loop part 10 installed on one lane may mean a part of the plurality of loop parts 10. For example, the first loop 12 to the third loop 16 may be installed in one lane on the road 100 . That is, in the case of one lane, the loop unit 10 may be described as including the first loop 12 to the third loop 16 .

In addition, a plurality of loops constituting the loop unit 10 may be electromagnetically coupled to each other in a wired or wireless manner.

Here, the radar unit 30 is located at a location on the road 100 that transmits waves including sound waves, ultrasonic waves and electromagnetic waves within a certain area and receives waves reflected from objects 40 and the like within a certain area. can be installed

Here, the control unit 1 may be electrically connected to the radar unit 30 and the loop unit 10, and obtain traffic information by receiving electromagnetic signals transmitted from the radar unit 30 and the loop unit 10. can

Hereinafter, obtaining traffic information by the control unit 1 using information obtained from the loop unit 10 and/or the radar unit 30 will be described.

One Detection of an object using the loop unit

Hereinafter, obtaining information related to the passage of the object 40 on the road 100 using the loop unit 10 will be described.

2 is a schematic diagram illustrating a moment when an object moves according to a traveling direction of a road, according to an exemplary embodiment.

Referring to FIG. 2 , the object 40 may sequentially pass through the first loop 12 and the second loop 14 while moving in the direction of the road 100 .

Hereinafter, a loop in which the target object 40 enters in the priority order may be expressed as an entry loop, and a loop exiting from the loop unit 10 may also be expressed as an exit loop. For example, when the object 40 first enters the first loop 12, the first loop 12 may become an entry loop, and when it finally exits from the second loop 14, the second loop ( 14) can be an exit loop.

The first loop 12 and the second loop 14 on the road 100 shown in FIG. 2 are representatively shown to describe a plurality of loops, and the number of loops may be three or more. Hereinafter, for convenience of description, the loop unit 10 installed on the road 100 will be described as being composed of a first loop 12 and a second loop 14.

Here, the first loop 12 and the second loop 14 may have the same size, and the length between the loops may be arbitrarily set. For example, the diameters of the first loop 12 and the second loop 14 may be 1.8 m, and the distance between the first loop 12 and the second loop 14 may be installed at a distance of 2.7 m. .

3(a) and (b) are graphs illustrating changes in measurands obtained in a first loop and a second loop, respectively, according to an exemplary embodiment.

In the graph shown in FIG. 3, the horizontal axis represents time, and the vertical axis represents the measured quantity. Here, the time unit of the horizontal axis may be displayed in units such as seconds (sec), milliseconds (msec), and minutes (min), but is not limited thereto, and all units capable of expressing time are time units on the horizontal axis It can be. In addition, the measured quantity on the vertical axis means the measured quantity detected by the loop unit 10, and may mean a unit having electromagnetic characteristics such as current, voltage, and frequency. For example, when an alternating current is applied to the loop unit 10, the measurement quantity on the vertical axis may mean frequency, and the frequency may change depending on whether or not the target object 40 passes.

Referring to FIGS. 2 and 3 , when the object 40 passes through the loop part 10 as the object 40 moves in the direction of the road 100 , a change may occur in the measurement amount.

More specifically, when the object 40 moves from the first loop 12 to the second loop 14, the control unit 1 moves the object 40 through the information obtained from the loop unit 10. It enters the first loop 12 at the first time point t1, exits the first loop 12 at the third time point t3, enters the second loop 14 at the second time point t2, and enters the fourth loop 12 at the second time point t2. Information about exiting the second loop 14 at time point t4 may be obtained.

Here, the second viewpoint may be a viewpoint prior to the third viewpoint. For example, when the distance between the first loop 12 and the second loop 14 is smaller than the length of the object 40, the second viewpoint may precede the third viewpoint.

The controller 1 may obtain information about whether the object 40 passes, the passage speed, and the length of the object 40 using information of the first to fourth points in time when the measurement quantity changes.

In this case, whether or not to pass may be information about starting to enter each loop at a time point when the measurement quantity is changed, such as a first time point or a third time point, and leaving each loop at a second time point or a fourth time point.

In addition, between the first time point and the third time point and between the second time point and the fourth time point, the object 40 is located on each loop, and the control unit 1 additionally moves the loop of the object 40 through a change in the measured quantity. Sub 10 may obtain occupancy information. In other words, the occupancy information may mean whether the object 40 is located on the loop unit 10 .

Here, the controller 1 may obtain information about the speed at which the object 40 passes through the loop unit 10 by using information of the first to fourth viewpoints.

According to an embodiment, the controller 1 may obtain speed information of the object 40 using the loop unit 10 information and transit time information. Specifically, the controller 1 may store information about the diameter and length of each loop included in the information of the loop unit 10 and the distance between the loops, and obtain information about the time the object 40 passes through, so that the two information Passing speed information of the object 40 may be obtained by using.

(Equation 1)

Equation 1 represents an equation for the control unit 1 to obtain passing speed information according to an exemplary embodiment.

Referring to Equation 1, the passing speed information (v) may be obtained based on the length of the loop, the interval between the loops, and the passing time. In this case, the length of the loop may be the diameter of the loop, but the length of the loop is not limited thereto, and may mean a length through which an object passes through the loop.

For example, when the entry of the object 40 is taken as a criterion, the controller 1 obtains passing speed information based on the difference between the first and second viewpoints, the length of the first loop 12, and the distance between the loops. If it can be obtained or based on the advancement of the object 40, the control unit 1 passes speed information based on the difference between the third and fourth viewpoints, the length of the second loop 14, and the interval between the loops. can be obtained. As a more specific example, when the length of the first loop 12 is 1.8 m, the interval between the loops is 2.7 m, and the difference between the first and second time points is 100 msec, the controller 1 controls the movement of the object 40 Passing speed information can be obtained at 162 km/h.

For another example, when the object 40 enters or leaves the first loop 12 or the second loop 14, the controller 1 moves the object 40 to the first loop 12 or the second loop. In (14), the passing speed information of the object 40 may be obtained based on the time taken to completely occupy or the time taken to completely advance. For a more specific example, although not shown in the drawing, the object 40 enters the first loop 12 from the first time point and completely occupies the first loop 12 at the time point 1-1, which is 40 msec later. In this case, the control unit 1 acquires the passing speed information of the object 40 at 162 km/h based on the length of the first loop 12 of 1.8 m and the difference between the first time point and the 1-1 time point of 40 msec. can do.

For another example, when the controller 1 stores information related to the degree of change in the measurand according to the degree of occupancy of the loop unit 10, the controller 1 controls the object 40 based on the change in the measured quantity and the amount of time change. ) can be obtained. That is, the controller 1 may obtain the passing speed information of the object 40 using the gradient information or differential information.

According to an embodiment, the controller 1 may obtain length information of the object 40 by using passage speed information, passage time information, and length information of the loop unit 10 .

(Formula 2)

Equation 2 represents an equation for obtaining length information of the object 40 according to an exemplary embodiment.

For example, if the passing speed information of the object 40 acquired by the control unit 1 is 100 km/h, the length of the first loop 12 is 1.8 m, and the time from entering the first loop 12 to exiting is When the difference between the first and third viewpoints is 237.6 msec, the controller 1 may obtain length information of the object 40 as 4.8 m.

2 Detection of an object using the radar unit

Hereinafter, obtaining information related to the passage of the object 40 on the road 100 using the radar unit 30 will be described.

According to an embodiment, the radar unit 30 may transmit radio waves, etc. to a certain area, and transmit frequency information and transmission and reflection time information of radio waves reflected from the target object 40 to the controller 1, and In (1), the passage speed information of the object 40 may be obtained based on the information obtained from the radar unit 30 .

(Formula 3)

Equation 3 represents an equation for obtaining the velocity of the object 40 according to an exemplary embodiment.

Referring to Equation 3, f represents the frequency of a radio wave transmitted from the radar unit 30, v represents the speed of a radio wave transmitted from the radar unit 30, and f' represents an object acquired by the radar unit 30. It represents the frequency of the radio wave reflected from (40), and vs may mean the speed of the object (40).

The radar unit 30 transmits radio waves having a certain frequency and speed over a certain area, and may obtain frequency information of radio waves reflected from the target object 40 and transmit the obtained frequency information to the control unit 1 .

Referring to Equation 3, the control unit 1 obtains the passage speed information of the object 40 based on the frequency and speed information of the radio wave transmitted by the radar unit 30 and the frequency information of the radio wave reflected from the object 40. can do.

That is, the control unit 1 may obtain the passing speed information of the object 40 based on the information acquired through the radar unit 30 .

3 Acquisition of traffic information through combined use of roof and radar

Hereinafter, calculation of traffic information on a traffic condition on the road 100 by using the loop unit 10 and the radar unit 30 in combination will be described.

4 is a schematic diagram showing the configuration of a traffic information calculation device according to an embodiment.

Referring to FIG. 4 , the traffic information calculation device may include a controller 1, a loop unit 10, a radar unit 30, an output unit 50, and a server 60 unit.

At this time, the control unit 1, the loop unit 10, the radar unit 30, the output unit 50, and the server 60 may be electrically coupled in a wired or wireless format.

As described above, the loop unit 10 and the radar unit 30 may acquire information about an object 40 passing through a certain area on the road 100 and transmit the corresponding information to the control unit 1 .

The control unit 1 may calculate and obtain traffic information on the road 100 using the information obtained from the loop unit 10 and the radar unit 30, and obtain it from the loop unit 10 and the radar unit 30. The obtained information and the traffic information acquired by the control unit 1 may be transmitted to the output unit 50 or the server 60 .

The output unit 50 may receive traffic information from the control unit 1 and output the contents of the received traffic information to the outside. That is, the output unit 50 may output traffic information through a display or the like.

The server 60 may receive information and traffic information obtained from the loop unit 10 and the radar unit 30 from the control unit 1 and store or process the corresponding information.

Alternatively, the output unit 50 may receive stored information or processed information from the server 60 and output it to the outside.

3.1 Obtain object speed information

According to an embodiment, when speed information on the target object 40 is obtained from the radar unit 30, the control unit 1 converts the information obtained through the loop unit 10 to the speed information on the same object 40. can be obtained on the basis of

Specifically, when the radar unit 30 detects an object 40 passing through a certain area on the road 100, the control unit 1 passes the object 40 passing through the loop unit 10 in the same time period. As mentioned above, the speed of the object 40 may be calculated and obtained using information or the like.

This is because, in order for the control unit 1 to obtain precise information about the object 40, the control unit 1 determines whether the actual object 40 has passed through the detection result of the radar unit 30 in which an error exists in the speed range. , and obtaining speed information of the object 40 through passage information of the loop unit 10 through which the actual object 40 passes.

According to another embodiment, the control unit 1 calculates each speed information based on the information obtained from the radar unit 30 and the information obtained from the loop unit 10 in order to obtain the speed information of the object 40. An average value of may be obtained as speed information of the object 40 .

The speed information of the object 40 described above may mean passing speed information in which the object 40 passes on a certain area on the road 100, that is, the speed information may be included in the passing information.

3.2 Detection of object abnormal driving

When there is an abnormality in the passage information of the object 40 detected through the loop unit 10, the controller 1 may not use the corresponding passage information when calculating traffic information. That is, the passage information of the object 40 may be invalidated when traffic information is calculated.

Hereinafter, processing of the control unit 1 when there is an abnormality in the information obtained by the control unit 1 through the loop unit 10 and the radar unit 30 will be described.

5 and 6 are diagrams illustrating results of detecting a loop portion according to abnormal driving of an object, according to an exemplary embodiment.

Referring to FIG. 5, as shown in FIG. 5(a), a plurality of objects 40 exist on the road 100, and a following object 42 exits from the first loop 12, which is an entry loop, and is an exit loop. Before entering the second loop 14, when the preceding object 44 changes its traveling direction in the exit loop direction, the loop unit 10 or the control unit 1 operates for each loop according to FIG. 5(b). The detection result can be obtained.

Referring to FIG. 5(b) , when the preceding object 44 changes lanes into an entry loop, the measurement quantity obtained in the loop unit 10 is a time point preceding the fourth time point, which is the time point of exiting the entry loop. At a third point in time, exit loop may appear to be complete.

As shown in FIG. 5 , when the exit time in the exit loop precedes the exit time in the entry loop, the controller 1 may exclude the corresponding passing information from calculating traffic information as abnormal driving.

Referring to FIG. 6, when the object 40 does not entirely occupy the loop portion 10 and moves in the forward direction while occupying only a portion of the loop portion 10, as shown in FIG. 6 (a), the loop portion 10 or The control unit 1 may obtain detection results for each loop according to FIG. 6(b).

Referring to FIG. 6(b) , when the object 40 proceeds while occupying only a portion of the loop portion 10 in the traveling direction of the road 100, the change in the measurement quantity obtained in the loop portion 10 is entered. It can appear to enter the exit loop after the point at which it exits the loop.

Since the length of a typical object 40 is designed or manufactured to be longer than the distance between loops, the object 40 that progresses while occupying the entire loop portion 10 has a second point in time, which is an exit point in the entry loop, in the entry loop. It may pass later than the third point of time entering the . Accordingly, when the entry point of the entry loop precedes the entry point of the entry loop, the controller 1 may exclude the passage information of the object 40 as abnormal driving when calculating traffic information.

According to another embodiment, when the object 40 travels while occupying only a part of the loop portion 10, the passage time obtained from the loop portion 10, that is, the occupancy time, travels while occupying the entire loop portion 10. It can be obtained shorter than the case of When the occupancy time is shortened, the passing speed information of the object 40 may appear to be much faster than the actual passing speed information of the object 40 . At this time, the control unit 1 may detect abnormal driving by comparing the speed information obtained through the radar unit 30 and the speed information obtained through the loop unit 10 .

That is, when the speed information obtained through the radar unit 30 and the speed information obtained through the loop unit 10 differ by more than a predetermined level, the control unit 1 considers that abnormal driving information is detected, and transmits the corresponding passage information. Can be excluded when obtaining traffic information. Here, a predetermined level may be predetermined.

For example, the speed information of the object 40 acquired by the control unit 1 through the radar unit 30 is 110 km/h, but the speed information of the object 40 obtained through the loop unit 10 is set in advance. In the case of 125 km/h outside the error range of 10 km/h, the controller 1 may exclude passage information of the corresponding object 40 when obtaining traffic information.

According to an embodiment, the controller 1 may obtain whether the object 40 is normally proceeding in the direction of the road 100 based on information obtained from the loop unit 10, and the controller 1 ) In the case where the object 40 does not pass through all of the first loop 12 and the second loop 14 along the traveling direction of the road 100, there is abnormal driving and the corresponding passage information can be excluded when obtaining traffic information. can

7 is a graph showing that a change in a measurement quantity first occurs in an exit loop as an object drives in reverse on a road, according to an embodiment.

Here, driving in reverse may mean that the object 40 proceeds in a direction opposite to the direction of travel designated on the road 100 .

According to an embodiment, the control unit 1 determines that the object 40 is traveling abnormally when the object 40 enters the entry loop and exits the entry loop from the passage information acquired through the loop unit 10. After determining, the corresponding passage information may be excluded when obtaining traffic information.

That is, when the first loop 12 is an entry loop and the second loop 14 is an exit loop, the control unit 1 passes the object 40 through the second loop 14 before the first loop 12. If it is detected, the corresponding passage information may be excluded when acquiring traffic information.

According to another embodiment, the control unit 1 determines that the passage information of the object 40 obtained through the radar unit 30 is traveling in a direction opposite to the traveling direction of the road 100, and the loop unit 10 When the passage of the object 40 is detected first in the exit loop rather than the entry loop in the passage information of the object 40 obtained through It can be included in traffic information.

That is, when all the information acquired about the object 40 by the radar unit 30 and the loop unit 10 indicates that the object 40 is moving in the opposite direction to the traveling direction of the road 100, the control unit 1 may determine that the corresponding object 40 is actually traveling in reverse, obtain reverse driving information, and include it in traffic information.

3.3 Traffic information acquisition and output

According to an embodiment, the controller 1 may obtain passage information for each object 40 and may obtain traffic information based on the obtained plurality of passage information.

That is, the control unit 1 may obtain congestion information indicating how much congestion occurs on the corresponding road 100 through an average value of a plurality of passage speed information. Here, congestion information may be included in traffic information.

For example, when the road 100 on which passing information is acquired is the highway 100, the control unit 1 determines that, when the average value of the passing speed information of the plurality of objects 40 is 40 km/h or less, congestion, 40 km/h It is possible to obtain congestion information that indicates delay when the speed is 80 km/h or less, and smooth when the speed is 80 km/h.

In addition, the controller 1 or the server 60 may additionally obtain statistical information and information derived from traffic information based on the obtained traffic information.

8 is a diagram illustrating that an output unit outputs traffic information based on traffic information obtained by a control unit according to an exemplary embodiment.

Referring to FIG. 8 , the controller 1 may obtain information on the number of times the object 40 passes and the average speed for each lane in which the radar unit 30 and the loop unit 10 are installed. That is, the controller 1 may obtain information on the number of objects 40 that have passed for a certain period of time and the average speed of the objects 40 that have passed for each lane in which the loop unit 10 is installed.

Also, referring to FIG. 8 , the controller 1 may obtain traffic information for each length of the object 40 . Specifically, the control unit 1 may obtain length information for each object 40 through passage information of the radar unit 30 or the loop unit 10, and the object passing through the road 100 for a certain period of time ( The number of objects 40 having similar lengths 40) may be obtained as traffic information.

Also, the controller 1 may obtain average speed information for each length of the object 40 . Specifically, the control unit 1 may obtain length information for each object 40 and speed information of the corresponding object 40 through passage information of the radar unit 30 or the loop unit 10, and similar objects ( Average passing speed information may be obtained from a plurality of objects 40 having length information of 40).

Here, all of the preceding pieces of information are included in traffic information, so the control unit 1 may transmit the traffic information to the output unit 50 or the server 60.

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program commands recorded on the medium may be specially designed and configured for the embodiment or may be known and usable to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. - includes hardware devices specially configured to store and execute program instructions, such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of program instructions include high-level language codes that can be executed by a computer using an interpreter, as well as machine language codes such as those produced by a compiler. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

As described above, although the embodiments have been described with limited examples and drawings, those skilled in the art can make various modifications and variations from the above description. For example, the described techniques may be performed in an order different from the method described, and/or components of the described system, structure, device, circuit, etc. may be combined or combined in a different form than the method described, or other components may be used. Or even if it is replaced or substituted by equivalents, appropriate results can be achieved.

Therefore, other implementations, other embodiments, and equivalents of the claims are within the scope of the following claims.

control unit 1 loop unit 10
Radar unit 30 Output unit 50
server 60

Claims (7)

A traffic information calculation device for obtaining traffic information on a road,
a radar unit for transmitting radio waves within a certain area on the road and receiving radio waves reflected from an object;
a loop unit installed on the predetermined area on the road and detecting whether or not the object passes and a passing time; and
a control unit that obtains information about the object passing through the certain area based on information about the object input through the radar unit and the loop unit, and obtains the traffic information on the road based on the passing information; and ,
The transit time is the time from when the object enters the loop unit to when it exits,
The passing information includes at least one of driving information, speed information, or length information of the object within a certain area of the object,
Traffic information calculation device. According to claim 1,
Further comprising an output device for receiving the traffic information from the control unit and outputting the traffic information.
Traffic information calculation device. According to claim 1,
The loop portion includes a first loop and a second loop,
The first loop is located before the second loop in the traveling direction of the road,
The control unit excludes the passage information from obtaining the traffic information when whether or not the object passes is detected first in the second loop rather than in the first loop.
Traffic information calculation device. According to claim 1,
The driving information includes information on a direction in which the object travels on the road,
When the driving information of the object acquired through the radar unit is in a direction opposite to the traveling direction of the road and the driving information of the object obtained through the loop unit is in a direction opposite to the traveling direction of the road, Include reverse driving information in the traffic information,
The reverse driving information is information in which the object is traveling in a direction opposite to the traveling direction of the road,
Traffic information calculation device. According to claim 1,
The traffic information includes average driving speed information on the road or congestion information on the road;
The average driving speed information is obtained through an average of the speed information of the object when the object is plural,
The congestion information is obtained based on the average driving speed,
Traffic information calculation device. According to claim 1,
The loop part includes a first loop part and a second loop part,
The control unit excludes the passage information about the object obtained through the radar unit when obtaining the traffic information when the object does not pass through at least one of the first loop part and the second loop part.
Traffic information calculation device. According to claim 1,
The length information of the object is obtained based on the speed information and the length information of the loop part.
Traffic information calculation device.

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