KR102242367B1 - Portable apparatus and method for measuring the vehicle's point speed and interval speed simultaneously - Google Patents

Abstract

Provided are a system and a method for simultaneously measuring a point speed and a section speed. The system of the present invention comprises: a first movable simultaneous measuring unit installed at a first point to measure a point speed (hereinafter referred to as "a first final point speed") at the first point by using 2n laser beams which are transmitted, respectively, to one or more roads and then reflected, and generate a vehicle number (hereinafter referred to as "a first vehicle number") from a first vehicle image taken of a vehicle traveling on the one or more road; a second movable simultaneous measuring unit installed at a second point to measure a point speed (hereinafter referred to as "a second final point speed) at the second point by using 2n laser beams which are transmitted respectively to one or more road and then reflected, and generate a vehicle number (hereinafter referred to as "a second vehicle number") from a second vehicle image taken of a vehicle traveling on one or more roads; and an operation terminal unit using the first vehicle number and the second vehicle number generated, respectively, by the first movable simultaneous measuring unit and the second movable simultaneous measuring unit to calculate a section speed between the first point and the second point.

Description

TECHNICAL FIELD [Portable apparatus and method for measuring the vehicle's point speed and interval speed simultaneously}

The present invention relates to a system and method for measuring point speed and section speed at the same time, and more specifically, it is movable, measures the point speed and section speed at the same time, and corrects the error of the point speed or section speed measured in the conventional method. It relates to a system and method for simultaneously measuring point speed and section speed that can provide a correction value for the following.

The representative traffic information provided by the traffic information system is the travel speed or travel time of the vehicle. Vehicle travel speed is largely divided into point speed and section speed. Point speed is the instantaneous speed measured when a vehicle passes through a point on the road, and section speed is the actual travel speed calculated by measuring the passing time of each vehicle passing through two points (start point and end point) on the road. .

When comparing the point speed and section speed, there is little difference between the point speed and section speed when the traffic congestion is small, but the point speed is high when the traffic congestion is large. In the case of heavy traffic congestion, the point detector measuring the point speed does not properly reflect the vehicle's stop and go phenomenon (a phenomenon in which the vehicle stops and goes repeatedly due to severe traffic congestion), and the dispersion of individual vehicle speeds increases. As such, the point speed has a fundamental limitation in estimating the actual section speed of the vehicle.

In the early days of major domestic traffic information systems such as Intelligent Transport Systems (ITS), point speed measuring devices were mainly operated. Although the accuracy is poor in terms of the section speed that the driver wants, the point speed collection device that can collect traffic volume and occupancy data at the same time has great utility.

In recent years, the purpose of the traffic information system has been strengthened in terms of services that provide traffic information to drivers rather than traffic management. For drivers, traffic data such as traffic volume and occupancy rate do not have much meaning, and travel speed or travel time is important information. In particular, the travel speed that is generally important to the driver is section speed. This is because the information required by the driver is important at what speed and how long it takes from the start point to the end point. Due to this, the device for measuring section speed is gradually increasing in utility.

Transportation information systems are mainly installed and operated by public institutions such as the central government and local governments for the public benefit. Traffic speed or travel time information service is also important from the driver's side, but traffic management functions are also important at the level of the national transportation system.

Therefore, not only a section speed measuring device but also a point speed measuring device is required, and each has its strengths and weaknesses, so it is necessary to perform complementary functions.

Meanwhile, in general, section traffic information, for example, information useful from section A to section B is provided to the driver. To this end, it is necessary to convert the point speed of the section in which the point speed measuring device is installed into the section speed. However, most of them simply average and provide a number of point velocities without an appropriate methodology, and the point velocity measurement device has three kinds of errors.

First, it is an error that occurs in the process of converting the point speed to the section speed. That is, it is impossible to know how much error the value converted by the above-described method has compared with the actual section speed. Therefore, there is a need for a mobile device capable of comparing and evaluating the actual section speed for a section of a road in which the point speed measurement device is operating.

Second, it is an error that occurs in the process of matching the start and end points of a section. In most cases, the point where the point speed measurement device is installed does not match the starting point position desired by the driver. Therefore, an error is additionally generated in the process of converting the collected point speed to the section speed of the start/end section desired by the driver.

Third, it is an error of the point speed measuring device itself. The image sensor-type point speed measuring device is highly affected by weather or shadows, and the loop-sensor-type point speed measuring device tends to be less accurate over time due to road damage. The laser sensor type point speed measuring device uses one or two laser beams per lane. The laser sensor method is accurate in detecting one lane, but there is a limit to detecting an abnormality in two lanes. This is because a situation where detection is not possible occurs because the vehicle driving the inner lane is blocked by the vehicle driving the outer lane.

In addition, in the existing section speed measuring device, since the point where the section speed measuring device is installed does not coincide with the starting and ending point position desired by the driver, there is a problem in that an error occurs in the process of matching it.

The above problem occurring in most traffic information systems currently in operation is a problem that occurs because the section speed measuring device and the point speed measuring device are operated separately. That is, there is no device or methodology capable of measuring accuracy or supplementing data by linking two devices.

Domestic registered patent No. 10-1291301 (registered on July 24, 2013)

The technical problem to be achieved by the present invention in order to solve the above-described problem is, the technical problem to be achieved by the present invention is a point speed capable of measuring and correcting an error of a point speed measuring device by simultaneously measuring a point speed and a section speed. It is to present a system and method for measuring section speed at the same time.

In addition, after calculating the error that occurs in the process of converting the point speed measured by the point speed measuring device into the section speed, calculating the error of the sensor itself provided in the point speed measuring device, the point speed that can correct this error. And it is to propose a system and method for simultaneously measuring section speed.

In addition, the technical problem to be achieved by the present invention is to provide a system and method for simultaneously measuring point speed and section speed capable of evaluating the accuracy of traffic information services including travel speed or travel time provided by traffic information service organizations. have.

The problem of the present invention is not limited to those mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

As a means for solving the above-described technical problem, according to an embodiment of the present invention, a system for measuring point speed and section speed at the same time is installed at a first point, and 2n laser beams are reflected by being transmitted to one or more lanes, respectively. The vehicle number (hereinafter, referred to as the vehicle number (hereinafter referred to as hereinafter) from the first vehicle image generated by photographing a vehicle driving on the one or more lanes) measures the point speed at the first point (hereinafter, referred to as'first final point speed') , A first mobile simultaneous measuring device that generates a'first vehicle number'); The point velocity at the second point (hereinafter referred to as'second final point velocity') is measured using 2n laser beams installed at the second point and reflected by each transmitted to one or more lanes, and the 1 A second mobile simultaneous measurement device for generating a vehicle number (hereinafter referred to as a “second vehicle number”) from a second vehicle image generated by photographing a vehicle driving on more than one lane; And an operation terminal device that calculates a section speed between the first point and the second point by using the first vehicle number and the second vehicle number generated by the first and second portable simultaneous measurement devices and the second portable simultaneous measurement device. do.

The first mobile simultaneous measuring device includes: a first final point velocity measuring unit for measuring the first final point velocity using a time when a vehicle passes the 2n laser beams and a distance between the 2n laser beams; A first photographing unit for extracting a license plate area from vehicle images generated by photographing a vehicle driving the at least one lane when the first final point speed measurement unit recognizes the vehicle; And a first vehicle number recognition unit that recognizes and extracts the first vehicle number from the license plate area extracted from the first photographing unit.

The first final point speed measurement unit may include: a first laser sensor unit that transmits n laser beams toward a front portion of the vehicle and transmits the remaining n laser beams toward a rear portion of the vehicle; (N-1) distance between n laser beams transmitted toward the front of the vehicle and (n-1) distance between the remaining n laser beams transmitted toward the rear, the vehicle is 2n A first temporary point velocity calculating unit that calculates 2 (n-1) temporary point velocities using time points passing through the laser beams; And a first final point velocity calculating unit that calculates the average of the 2 (n-1) temporary point velocity as the first final point velocity.

The operation terminal device calculates an average of the first final point velocity and the second final point velocity measured by the first and second portable simultaneous measuring devices and the first section speed between the first and second points. A first section speed calculation unit that calculates as <RTI ID=0.0>; If the vehicle corresponding to the first vehicle image and the second vehicle image is the same vehicle, the time at which the first vehicle image is captured, the time at which the second vehicle image is captured, and the distance between the first point and the second point are used. A second section speed calculation unit that calculates a second section speed that is an actual section speed between the first point and the second point; And calculating an error rate of the first section speed by using the difference between the first section speed and the second section speed, and compensating the error of the first section speed by comparing the first section speed with the second section speed. It includes; section speed correction value calculation unit for calculating a correction value for.

When receiving the first point velocity measured from the point velocity measuring device, the operation terminal device calculates an error rate of the first point velocity by using the difference between the first final point velocity and the first point velocity, and the second point velocity. And a point speed correction value calculating unit that compares the first point speed with the first point speed and calculates a correction value for correcting an error of the first point speed.

When receiving the travel speed between the first point and the second point served by the traffic information service providing server, the operation terminal device calculates an error rate of the travel speed by using the difference between the travel speed and the second section speed. And a travel speed correction value calculating unit that compares the travel speed with the second section speed and calculates a correction value for correcting the error of the travel speed.

On the other hand, according to another embodiment of the present invention, the method for simultaneously measuring point speed and section speed includes (A) a first mobile simultaneous measuring device installed at a first point, which is transmitted to at least one lane and reflected by 2n units. The vehicle number from the first vehicle image generated by measuring the point speed (hereinafter referred to as'first final point speed') at the first point using a laser beam, and photographing a vehicle driving on the one or more lanes Generating (hereinafter referred to as'first vehicle number'); (B) The second mobile simultaneous measuring device installed at the second point uses 2n laser beams that are transmitted and reflected to one or more lanes, respectively, and the point speed at the second point (hereinafter referred to as'the second final point speed Measuring') and generating a vehicle number (hereinafter referred to as'second vehicle number') from a second vehicle image generated by photographing a vehicle driving in the one or more lanes; And (C) the operation terminal device, using the first vehicle number and the second vehicle number generated by the first and second mobile simultaneous measurement devices, the section speed between the first and second points. It includes; calculating step.

In the step (A), the first movable simultaneous measuring device measures the first final point velocity using the time when the vehicle passes the 2n laser beams and the distance between the 2n laser beams. ; (A2) when the first final point speed measuring unit recognizes the vehicle, extracting a license plate area from the vehicle image generated by photographing the vehicle driving the one or more lanes; And (A3) recognizing and extracting the first vehicle number from the license plate area extracted in step (A2).

In the step (A1), the first mobile simultaneous measurement device transmits n laser beams toward the front of the vehicle (A11), and transmits and receives the remaining n laser beams toward the rear of the vehicle. ; (A12) (n-1) distance between n laser beams transmitted toward the front of the vehicle and (n-1) distance between the remaining n laser beams transmitted toward the rear, vehicle Calculating 2(n-1) first temporary point velocities using the time passing through the 2n laser beams; And (A13) calculating the average of the 2 (n-1) first temporary point velocities calculated in step (A12) as the first final point velocities.

In the step (C), the operation terminal device (C1) calculates the average of the first and second final point speeds measured by the first and second mobile simultaneous measuring devices. Calculating as a first section speed between the point and the second point; (C2) If the vehicle corresponding to the first vehicle image and the second vehicle image is the same vehicle, the time at which the first vehicle image was photographed and the time at which the second vehicle image was photographed, and between the first point and the second point Calculating a second section speed, which is an actual section speed between the first point and the second point by using the distance; And (C3) the error rate of the first section speed is calculated using the difference between the first section speed and the second section speed, and the error rate of the first section speed is compared by comparing the first section speed and the second section speed. It includes; calculating a correction value for correcting.

In the step (C), when the operation terminal device receives the first point velocity measured from the point velocity measuring device (C4), the first point velocity is determined by using the difference between the first final point velocity and the first point velocity. And calculating an error rate of the point velocity, comparing the first final point velocity with the first point velocity, and calculating a correction value for correcting the error of the first point velocity.

In the step (C), when the operation terminal device receives the travel speed between the first point and the second point served by the (C5) traffic information service providing server, the difference between the travel speed and the second section speed is determined. And calculating an error rate of the travel speed by using, and calculating a correction value for correcting the error of the travel speed by comparing the travel speed with the second section speed.

According to the present invention, by simultaneously measuring the point speed and section speed of the vehicle in real time, the error of the already installed and operating point speed measuring device, the error of the section speed calculated through the point speed measuring device, and the section speed measuring device are determined. It is possible to measure the error of the travel speed calculated through and correct it in real time.

Further, according to the present invention, it is possible to improve the accuracy of travel speed or travel time information.

In addition, according to the present invention, it is possible to evaluate the traffic information service of the traffic information service institution to the public, and through this, it is possible to improve the reliability of the traffic information service institution in the traffic information service to the public.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a diagram showing a system for simultaneously measuring point speed and section speed according to an embodiment of the present invention;
2 is a block diagram showing a first mobile simultaneous measurement device;
3 is an enlarged view of a lane through which n laser beams are transmitted/received from the first mobile simultaneous measurement device shown in FIG. 1;
4 is a block diagram showing a second mobile simultaneous measurement device shown in FIG. 1;
5 is a block diagram showing the operating terminal device shown in FIG. 1, and,
6 is a flowchart schematically illustrating a method of simultaneously measuring a point speed and a section speed in a system for measuring point speed and section speed according to an embodiment of the present invention.

Additional objects, features and advantages of the present invention may be more clearly understood from the following detailed description and accompanying drawings.

Prior to the detailed description of the present invention, the present invention is capable of various modifications and various embodiments, and the examples described below and shown in the drawings are intended to limit the present invention to specific embodiments. It should be understood as including all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

The terms used in the present specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present specification, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof does not preclude in advance.

In addition, terms such as "... unit", "... unit", and "... module" described in the specification may mean a unit that processes at least one function or operation.

In addition, in describing the present invention, when it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted.

1 is a diagram illustrating a system for simultaneously measuring point speed and section speed according to an embodiment of the present invention.

Referring to FIG. 1, a system for simultaneously measuring point speed and section speed according to an embodiment of the present invention includes a first portable simultaneous measurement device 100, a second portable simultaneous measurement device 200, and an operation terminal device 300. do.

The first mobile simultaneous measuring device 100 is installed at a first point, and uses 2n (n is an integer of 3 or more) laser beams that are transmitted and reflected to one or more lanes, respectively, at the point speed at the first point ( Hereinafter, the vehicle number from the first vehicle image generated by measuring the'first final point speed (V1)') and photographing a vehicle driving on one or more lanes (hereinafter referred to as'first vehicle number') ) Can be created.

The second mobile simultaneous measuring device 200 is installed at the second point, and the point speed at the second point (hereinafter, referred to as'second final point speed) using 2n laser beams transmitted and reflected by each of one or more lanes. (V2)') is measured, and a vehicle number (hereinafter, referred to as a'second vehicle number') can be generated from a second vehicle image generated by photographing a vehicle driving in one or more lanes.

The second mobile simultaneous measurement device 200 is installed at a second point spaced apart from the first point along the traveling direction of one or more lanes.

The operation terminal device 300 uses the first vehicle number and the second vehicle number generated by the first mobile simultaneous measurement device 100 and the second mobile simultaneous measurement device 200 to determine the actual value between the first and second points. Calculate section speed (hereinafter referred to as'second section speed (2V)').

In addition, the operation terminal device 300 calculates a correction value for correcting the first section speed (1V), which is the section speed between the first point and the second point calculated from the first final point speed and the second final point speed. do.

In addition, the operation terminal device 300 measures the first point speed (V1') and the second point speed (V2') measured by the first point speed measuring device 10 and the second point speed measuring device 20, respectively. Calculate a correction value for correction.

The first point speed measuring device 10 is installed within the effective range of the first movable simultaneous measuring device 100, so that the first movable simultaneous measuring device 100 measures the position within the lane (for example, 2n The point velocity (hereinafter referred to as'first point velocity V1') of the vehicle running in the area where the laser beam reaches) is measured. Accordingly, the first point speed measuring device 10 may measure the speed of a point within a predetermined area based on the same point as the first mobile simultaneous measuring device 100 or the same point among one or more lanes.

The second point speed measuring device 20 measures the point speed (hereinafter referred to as'second point speed V2') of a vehicle running in a lane in which the second mobile simultaneous measuring device 200 measures the point speed. Measure.

The first point speed measuring device 10 and the second point speed measuring device 20 may measure the point speed using an image sensor, a loop sensor, or a laser device.

In addition, the operation terminal device 300 calculates a correction value for correcting traffic information provided from the traffic information service providing server 30.

The traffic information service providing server 30 is a device operated by a public institution such as a central government or local government, and provides travel speed or travel time information.

The simultaneous point speed and section speed measurement system according to the embodiment of the present invention can simultaneously measure the final point speed (V1, V2) of two points and the actual section speed (2V) between two points. Using the final point velocity (V1, V2) or the actual section velocity (2V) of the point, the error of the point velocity (V1', V2') measured by the existing fixed/movable point velocity collecting device (10, 20) is You can make it possible to measure and calibrate.

In particular, an embodiment of the present invention is a section for measuring an error occurring in the process of converting the point velocity (V1', V2') measured by the first and second point velocity measuring apparatuses 10 and 20 into section velocity. A speed measurement function and a point speed measurement function for measuring an error of the sensor itself provided in the first and second point speed measurement devices 10 and 20 are simultaneously present, so that the first and second point speed measurement devices 10 , 20) can solve the error.

In addition, the system for simultaneously measuring point speed and section speed according to an embodiment of the present invention is for evaluating the accuracy of the travel speed (or travel time) traffic information service provided by the traffic information service organization 30 and correcting the error. Correction values can be provided.

Hereinafter, the operation of the simultaneous point speed and section speed measurement system according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5.

FIG. 2 is a block diagram showing a first mobile simultaneous measurement device 100, and FIG. 3 is an enlarged view of a lane through which n laser beams are transmitted and received from the first mobile simultaneous measurement device 100 shown in FIG. 1. .

Referring to FIG. 2, the first mobile simultaneous measurement device 100 includes a first global position system (GPS) unit 110, a first storage unit 120, a first final point speed measurement unit 130, and a first photographing unit. It includes a unit 140, a first vehicle number recognition unit 150, and a first communication unit 160. The first final point speed measurement unit 130 and the first vehicle number recognition unit 150 may be implemented as a processor.

The first GPS unit 110 receives the current location of the first mobile simultaneous measurement device 100, that is, location information of the first point.

The first storage unit 120 stores distances between points at which 2n laser beams transmitted from the first laser sensor unit 131 reach one or more lanes. ①, ②, ③, ④, ⑤, and ⑥ shown in FIG. 3 mean points at which 2n laser beams arrive. In the first storage unit 120, the distance between ① and ② (S11), the distance between ② and ③ (S12), the distance between ④ and ⑤ (S13), and the distance between ⑤ and ⑥ (S14) are measured and stored at the installation stage. Also, location information or identification information of ①, ②, ③, ④, ⑤, ⑥ can be stored together.

The first final point velocity measuring unit 130 may measure the first final point velocity V1 using the time when the vehicle passes the 2n laser beams and the distance between the 2n laser beams.

To this end, the first final point velocity measuring unit 130 includes a first laser sensor unit 131, a first temporary point velocity calculating unit 133, and a first final point velocity calculating unit 135.

The first laser sensor unit 131 is installed so that n of the 2n laser beams are transmitted toward the front of the vehicle and the remaining n are transmitted toward the rear of the vehicle, so that 2n laser beams can be transmitted and received.

In the case of FIG. 3, as n=3, the first laser sensor unit 131 transmits six laser beams per lane, three in charge of the front portion of the vehicle, and three in charge of the rear portion of the vehicle. The reason for installation in this way is to prevent a situation in which the vehicle in the inner lane cannot be detected because the vehicle driving the inner lane is covered by the vehicle driving the outer lane close to the installation position of the first laser sensor unit 131. to be.

The number of laser beams transmitted from the first laser sensor unit 131 may be 6 as shown in FIG. 3 in the case of a second lane, but this is an example and may increase further in proportion to an increase in the number of lanes.

The first temporary point speed calculation unit 133 includes (n-1) distances (S11, S12), which are the distances between n laser beams transmitted toward the front of the vehicle, and the remaining n laser beams transmitted toward the rear. The distance between (n-1) distances (S13, S14) and 2 (n-1) temporary spot speeds (V11, V12, V13, V14) are calculated using the time when the vehicle passes 2n laser beams. Can be calculated.

In detail, in the case of FIG. 3, since there are two (S11, S12) in the front and two (S13, S14) in the front part per lane, the temporary point speed, which is the speed between the laser beams, is also in the front part. Two are calculated, and two are calculated on the rear side.

For example, the first temporary point speed calculation unit 133 calculates the time difference from two times the vehicle passes through the laser beams ① and ②, and uses the distance S11 stored in the first storage unit 120 to calculate the time difference between ① and ② Calculate the temporary point speed (V11), which is the speed between. In the same way, the first temporary point speed calculation unit 133 calculates the temporary point speeds V12, V13, and V14. If there is no visual information passing through the laser beam, the temporary point velocity of the section will be zero.

The first final point speed calculation unit 135 calculates an average of 2 (n-1) temporary point speeds calculated by the first temporary point speed calculation unit 133 to determine the first final point speed, which is the speed of the first point. It can be calculated as (V1). As a result, the first final point speed calculation unit 135 may calculate a point speed with high accuracy and reliability compared to the first point speed measuring device 10 that calculates the point speed in a conventional manner.

When a vehicle is recognized by the first laser sensor unit 131, the first photographing unit 140 generates a vehicle image by photographing a vehicle driving on one or more lanes, and extracts a license plate area from the generated vehicle images to determine the vehicle. 1 It is stored in the storage unit 120.

The first photographing unit 140 may generate up to 2n vehicle images for the same vehicle. The first photographing unit 140 may include a vehicle license plate photographing device (AVI).

The first vehicle number recognition unit 150 performs image processing on the license plate area extracted from the first photographing unit 140 to recognize numbers and letters, and converts the recognized numbers and letters to a vehicle number (hereinafter, referred to as'the first vehicle). It is extracted as'number').

The first communication unit 160 includes location information measured by the first GPS unit 110, a first final point speed V1 measured by the first final point speed measurement unit 130, and a first vehicle number recognition unit 150. The first vehicle number recognized in is transmitted to the operating terminal device 300 through a wired/wireless communication interface.

FIG. 4 is a block diagram illustrating a second portable simultaneous measurement device 200 shown in FIG. 1.

4, the second portable simultaneous measurement device 200 includes a second GPS unit 210, a second storage unit 220, a second final point speed measurement unit 230, a second photographing unit 240, It includes a second vehicle number recognition unit 250 and a second communication unit 260.

A second GPS unit 210, a second storage unit 220, a second final point speed measurement unit 230, a second photographing unit 240, a second vehicle number recognition unit 250, and a second communication unit 260 The first GPS unit 110, the first storage unit 120, the first final point speed measurement unit 130, the first photographing unit 140, and the first vehicle number recognition unit described with reference to FIGS. 2 and 3 Since 150 and the first communication unit 160 are the same, a detailed description will be omitted.

The second GPS unit 210 receives the current location of the second portable simultaneous measurement device 200, that is, location information of the second point.

The second storage unit 220 includes points (①', ②', ③', ④', ⑤', ⑥) at which 2n laser beams transmitted from the second laser sensor unit 231 reach one or more lanes. ') to store the distance (S21, S22, S23, S24).

The second final point velocity measuring unit 230 may measure the second final point velocity V2 by using the time when the vehicle passes the 2n laser beams and the distance between the 2n laser beams.

To this end, the second final point velocity measuring unit 230 includes a second laser sensor unit 231, a second temporary point velocity calculating unit 233, and a second final point velocity calculating unit 235.

The second laser sensor unit 231 is installed so that n of the 2n laser beams are transmitted toward the front of the vehicle and the remaining n are transmitted toward the rear of the vehicle to transmit and receive 2n laser beams.

The second temporary point speed calculation unit 233 includes the distances (S21, S22) between the n laser beams transmitted toward the front of the vehicle, the distances between laser beams transmitted toward the rear (S13, S14), and the vehicle has 2n lasers. Using the time passing through the beam, 2 (n-1) temporary point velocities V21, V22, V23, and V24 can be calculated.

The second final point speed calculation unit 235 calculates the average of the 2 (n-1) temporary point speeds calculated by the second temporary point speed calculation unit 233 and calculates the second final point speed, which is the speed of the second point. It can be calculated as (V2).

When the second laser sensor unit 231 recognizes the vehicle, the second photographing unit 240 photographs a vehicle driving at one or more lanes around the second point and extracts a license plate area.

The second vehicle number recognition unit 250 extracts the second vehicle number from the license plate area extracted from the second photographing unit 240.

The second communication unit 260 transmits the location information of the second point, the second final point speed V2, and the second vehicle number to the operation terminal device 300.

5 is a block diagram illustrating the operation terminal device 300 shown in FIG. 1.

Referring to FIG. 5, the operation terminal device 300 includes a third communication unit 310, a third storage unit 320, a first section speed calculation unit 330, a second section speed calculation unit 340, and a section speed. A correction value calculation unit 350, a point speed correction value calculation unit 360, and a travel speed correction value calculation unit 370 are included. The first section speed calculation unit 330, the second section speed calculation unit 340, the section speed correction value calculation unit 350, the point speed correction value calculation unit 360, and the travel speed correction value calculation unit 370 are It can also be implemented as a processor.

The third communication unit 310 includes a first final point speed V1 from the first mobile simultaneous measurement device 100, a maximum of 2n first vehicle license plates, a time when the first vehicle image from which the first vehicle license plate is extracted is photographed, The location information of the first point is received, and the second final point speed (V2), maximum 2n number of second vehicle license plates, and the second vehicle image from which the second vehicle license plate is extracted from the second mobile simultaneous measurement device 200 are captured. It is possible to receive information about the location of the second point and the time when it was set.

In addition, the third communication unit 310 receives the first point speed V1' and the second point speed V2' from the first point speed measuring device 10 and the second point speed measuring device 20.

In addition, the third communication unit 310 receives the travel speed (ie, section speed) between the first point and the second point calculated from the traffic information service providing server 30.

The third storage unit 320 includes a distance between adjacent laser beams (S11, S12, S13, S14, S21, S22, S23, S24,) and a distance between laser beams corresponding to the first and second points (① and The distance between ①', between ② and ②', and between ⑥ and ⑥') can be stored.

In addition, the third storage unit 320 is the first final point speed V1 received by the third communication unit 310, a maximum of 2n first vehicle license plates, and the first vehicle image from which the first vehicle license plate is extracted. Time, location information of the first point, second final point speed (V2), maximum 2n license plates of the second vehicle, the time at which the second vehicle image from which the license plate of the second vehicle was extracted was captured, and the location information of the second point are stored. do.

The first section speed calculation unit 330 calculates the average of the first final point velocity V1 and the second final point velocity V2 as a first section velocity (first V), which is a section velocity between the first point and the second point. Calculate.

In addition, the first section speed calculation unit 330 calculates the first section speed (1V) for each individual vehicle, or the first section speed calculated for each vehicle at a predetermined time interval (30 seconds, 1 minute, 5 minutes, etc.). It can also be calculated as an average by counting the speeds of one section. In the case of calculating in units of a predetermined time interval, the deviation of the first section speed (1V) calculated for each vehicle can be eliminated.

The second section speed calculation unit 340 includes a first vehicle number at a first point recognized by the first vehicle number recognition unit 150 and a second vehicle number at a second point recognized by the second vehicle number recognition unit 250. If the first vehicle number is the same, it is matched to calculate the second section speed (2V), which is the actual section speed between the first point and the second point section. Since the section speed is calculated for the same vehicle number, the second section speed (2V) may be a value obtained by most accurately calculating the section speed of the vehicle.

If the second section speed calculation unit 340 matches the first vehicle number and the second vehicle number and is the same, that is, if the vehicle corresponding to the first vehicle image and the second vehicle image are the same vehicle, the first vehicle image is The second section speed (2V) may be calculated using the captured time and the time at which the second vehicle image was captured, the distance between the first point and the second point, or the distance between the laser beams.

In this case, the second section speed calculation unit 340 may match vehicle numbers up to 2n times per lane. In this case, the second section speed calculating unit 340 is between the first vehicle image and the second vehicle image generated at a maximum of 2n each at the first point and the second point per lane and the time at which the second vehicle image is captured and the 2n laser beams ( For example, a maximum of 2n temporary section speeds are calculated using the distances ① and ①', ~, ⑥ and ⑥'), and the average of the calculated maximum 2n temporary section speeds is calculated as the second section speed (2V). It can be calculated as

For example, the first vehicle number and the second vehicle number photographed in ① and ①', the first vehicle number and the second vehicle number photographed in ② and ②', ~, the first vehicle photographed in ⑥ and ⑥' The number and the number of the second vehicle can be matched. In this case, the second section speed calculation unit 340 is the distance between the laser beams stored in the third storage unit 320 (distance between ① and ①', distance between ② and ②', ~, distance between ⑥ and ⑥') After calculating the maximum six temporary section speeds by reflecting, the average can be calculated and set as the second section speed (2V).

In addition, the second section speed calculation unit 340 calculates the second section speed (2V) for each individual vehicle, or the second section speed calculated for each vehicle at a predetermined time interval (30 seconds, 1 minute, 5 minutes, etc.). It is also possible to calculate the second section speed (2V) as an average by counting the two section speeds.

The section speed correction value calculation unit 350 calculates an error rate of the first section speed (1V) by using the difference between the first section speed (1V) and the second section speed (2V), and A correction value for correcting an error of the first section speed may be calculated by comparing and the second section speed.

[Equation 1] is an equation for obtaining the error rate of the first section velocity (1V), and [Equation 2] is an equation for obtaining the error correction value of the first section velocity.

Referring to [Equation 1] and [Equation 2], the first section velocity is the first final point velocity (V1) measured by the first movable simultaneous measuring device 100 and the second movable simultaneous measuring device 200 And the second final point velocity V2, and the second section velocity is the actual section velocity calculated using the first vehicle image and the second vehicle image.

When receiving the first point speed from the first point speed measuring device 10, the point speed correction value calculation unit 360 uses the difference between the first final point speed V1 and the first point speed V1'. A correction value for correcting the error of the first point velocity (V1') by calculating the error rate of the first point velocity (V1') and comparing the first final point velocity (V1) and the first point velocity (V1') Can be calculated.

[Equation 3] is an equation for obtaining the error rate of the first point velocity (V1'), and [Equation 4] is an equation for obtaining the error correction value of the first point velocity.

Referring to [Equation 3] and [Equation 4], the point speed correction value calculation unit 360 includes a first point velocity V1 measured in a conventional fixed/mobile method by the first point velocity measuring device 10. The error rate of') may be calculated using the first final point velocity V1 calculated from the average of 2 (n-1) temporary point velocities, and a correction value for error correction may be calculated.

In addition, the point speed correction value calculation unit 360 calculates the error rate of the second point velocity V2' measured by the second point velocity measuring device 20 by applying mutatis mutandis to [Equation 3] and [Equation 4]. 2 It is calculated using the final point speed (V2), and a correction value for error correction can be calculated.

In addition, when the traffic information service providing server 30 receives the travel speed between the first point and the second point serving a plurality of vehicles, the travel speed correction value calculation unit 370 By using the difference, the error rate of the travel speed may be calculated, and a correction value for correcting the error of the travel speed may be calculated by comparing the travel speed with the second section speed.

[Equation 5] is an equation for calculating the error rate of the travel speed, and [Equation 6] is an equation for calculating the error rate correction value of the travel speed.

Using [Equation 1] to [Equation 6], the error rate of the first section speed, the first point speed, the second point speed, and the travel speed, and the error rate correction value is the second section speed or the first final point speed, It is calculated based on the second final point speed.

Section speed correction value calculation unit 350, point speed correction value calculation unit 360, and travel speed correction value calculation unit 370 is a first section speed calculated using [Equation 1] to [Equation 3] , The first point speed, the second point speed and the travel speed, and the first section speed, the first point speed, the second point speed, and the passage calculated using [Equation 4] to [Equation 6]. The error rate correction value for each speed may be transmitted to the traffic information service providing server 30 through the third communication unit 310.

The traffic information service providing server 30 is the error rate of each of the received first section speed, first point speed, and travel speed, and error rate correction values for each of the first section speed, first point speed, second point speed, and travel speed. Analysis can provide more accurate travel speed service.

The traffic information service providing server 30 provides a service by using the average of the first point speed V1' and the second point speed V2' measured from the first and second point speed measuring devices 10 and 20. It can correct the section speed in real time and provide information on the travel speed close to the true value.

In addition, when discriminating a vehicle type from a vehicle image, the simultaneous point speed and section speed measurement system according to the embodiment of the present invention simultaneously measures the point speed and section speed for each lane or vehicle type, and periodically or in real time. can do.

In addition, even when the point where the first mobile simultaneous measurement device 100 and the second mobile simultaneous measurement device 200 according to an embodiment of the present invention are installed does not coincide with the location of the starting and end point where the driver wants the section speed, the error rate It can be provided after correction using the correction value.

In addition, the traffic information service providing server 30 may not only provide the travel speed of the section, but also provide information on the travel time required to travel the section. In this case, if the distance between the start point and the end point of the section is a straight line distance, it is difficult to calculate the exact travel time. Therefore, after storing the actual distance information of the section, the travel time information is stored using the actual distance information and the corrected travel speed You can also provide.

In addition, according to another embodiment of the present invention, the point speed and section speed simultaneous measurement system uses wireless communication between the first mobile simultaneous measuring device 100 and the second mobile simultaneous measuring device 200 to determine the point speed and section speed. It is possible to measure at the same time and calculate an error rate correction value. In this case, one of the first portable simultaneous measurement device 100 and the second portable simultaneous measurement device 200 may perform an operation performed by the operating terminal device 300.

6 is a flowchart schematically illustrating a method of simultaneously measuring a point speed and a section speed in a system for measuring a point speed and a section speed according to an embodiment of the present invention.

The first mobile simultaneous measurement device 100, the second mobile simultaneous measurement device 200, and the operation terminal device 300 illustrated in FIG. 6 have been described with reference to FIGS. 1 to 5, and thus detailed descriptions thereof will be omitted.

Referring to FIG. 6, the first mobile simultaneous measuring device 100 measures a first final point velocity, which is a point velocity at a first point, using 2n laser beams respectively transmitted and reflected by one or more lanes, A first vehicle number is generated from a first vehicle image generated by photographing a vehicle driving in one or more lanes (S600).

Referring to step S600 in detail, the first mobile simultaneous measurement device 100 may measure the first final point velocity V1 using the time when the vehicle passes the 2n laser beams and the distance between the 2n laser beams. (S610). In step S610, (n-1) distances, which are the distances between n laser beams transmitted toward the front of the vehicle, and (n-1) distances, which are distances between the remaining n laser beams transmitted toward the rear, and the vehicle Using the time passing through the 2n laser beams, 2(n-1) first temporary point velocities are calculated. Then, the average of the calculated 2 (n-1) first temporary point speeds is calculated as the first final point speed V1.

When the laser beam recognizes the vehicle in step S610, the first portable simultaneous measurement device 100 extracts a license plate area from the vehicle image generated by photographing a vehicle driving on one or more lanes, and extracts a first license plate area from the extracted license plate area. The vehicle number is recognized and extracted (S620).

The first portable simultaneous measurement device 100 operates the terminal device 300 for operating the first vehicle number extracted in step S620, the time at which the first vehicle image was acquired, the first final point speed V1, and the location information of the first point. ) To transmit (S630).

In addition, the second mobile simultaneous measuring device 200 measures the second final point velocity, which is the point velocity at the second point, using 2n laser beams that are transmitted and reflected by each of one or more lanes, and A second vehicle number is generated from the second vehicle image generated by photographing the vehicle driving (S700).

Referring to step S700 in detail, the second mobile simultaneous measurement device 200 may measure the first final point velocity V1 using the time when the vehicle passes the 2n laser beams and the distance between the 2n laser beams. (S710).

When the laser beam recognizes the vehicle in step S710, the second portable simultaneous measuring device 200 captures the vehicle, recognizes and extracts the second vehicle number (S720).

The second portable simultaneous measurement device 200 operates the terminal device 300 for operating the second vehicle number extracted in step S720, the time at which the second vehicle image was acquired, the second final point speed V2, and the location information of the second point. ) To transmit (S730).

The operation terminal device 300 uses the first vehicle number and the second vehicle number generated by the first mobile simultaneous measurement device 100 and the second mobile simultaneous measurement device 200 to provide a section between the first and second points. The speed is calculated (S800).

To describe step S800 in detail, the operation terminal device 300 calculates the average of the first and second final point speeds V1 and V2 received in steps S630 and S730 between the first and second points. It is calculated as the first section speed (1V) (S810).

If the number of the first vehicle and the number of the second vehicle are the same, the operation terminal device 300 uses the time when the first vehicle image is captured, the time when the second vehicle image is captured, and the distance between the first point and the second point. The second section speed (2V), which is the actual section speed between the first point and the second point, is calculated (S820).

The operation terminal device 300 calculates an error rate of the first section speed V1 by using the difference between the first section speed V1 and the second section speed V2, and calculates the error rate of the first section speed V1 and the second section speed V1. A correction value for correcting an error of the first section speed V1 is calculated by comparing the section speed V2 (S830).

When the operating terminal device 300 receives the first point velocity V1' measured from the first point velocity measuring device 10, the difference between the first final point velocity V1 and the first point velocity V1' Calculate the error rate of the first point velocity (V1') using, and correct the error of the first point velocity (V1') by comparing the first final point velocity (V1) and the first point velocity (V1'). A correction value for is calculated (S840).

In addition, when receiving the second point speed V2', the operation terminal device 300 uses the difference between the second final point speed V2 and the second point speed V2' to determine the second point speed V2'. ) Is calculated, and a correction value for correcting the error of the second point velocity V2' is calculated by comparing the first final point velocity V2 and the second point velocity V2' (S850).

When the operation terminal device 300 receives the travel speed between the first point and the second point serviced by the traffic information service providing server 30, the travel speed by using the difference between the travel speed and the second section speed (2V). The error rate of is calculated, and a correction value for correcting the error of the travel speed is calculated by comparing the travel speed and the second section speed (2V) (S860).

In the above, all the constituent elements constituting the embodiment of the present invention may be combined and operated as one, or, if within the scope of the present invention, all of the constituent elements may be selectively combined and operated in one or more. In addition, although all of the components may be implemented as one independent hardware, a program module that performs some or all functions combined in one or more hardware by selectively combining some or all of the components. It may be implemented as a computer program having Codes and code segments constituting the computer program may be easily inferred by those skilled in the art of the present invention. Such a computer program is stored in a computer-readable storage medium, and is read and executed by a computer, thereby implementing an embodiment of the present invention.

On the other hand, although it has been described and illustrated in connection with a preferred embodiment for exemplifying the technical idea of the present invention, the present invention is not limited to the configuration and operation as illustrated and described as described above, and deviates from the scope of the technical idea. It will be well understood by those skilled in the art that a number of changes and modifications can be made to the present invention. Accordingly, all such appropriate changes and modifications and equivalents should be regarded as belonging to the scope of the present invention. Therefore, the true technical protection scope of the present invention should be determined by the technical idea of the attached registration claims.

10, 20: first and second point speed measuring device
30: Traffic information service providing server
100: first mobile simultaneous measuring device
110: first GPS unit 120: first storage unit
130: first final point speed measurement unit 140: first photographing unit
150: first vehicle number recognition unit 160: first communication unit
200: second mobile simultaneous measuring device
210: second GPS unit 220: second storage unit
230: second final point speed measurement unit 240: second photographing unit
250: second vehicle number recognition unit 260: second communication unit
300: operation terminal device
310: third communication unit 320: third storage unit
330: first section speed calculation unit 340: second section speed calculation unit
350: section speed correction value calculation unit 360: point speed correction value calculation unit
370: travel speed correction value calculation unit

Claims (12)

The point velocity at the first point (hereinafter referred to as'first final point velocity) using 2n laser beams installed at the first point and reflected by being transmitted to and reflected by each of one or more lanes (where n is an integer equal to or greater than 3) A first mobile simultaneous measurement device that measures'referred to as') and generates a vehicle number (hereinafter referred to as'first vehicle number') from a first vehicle image generated by photographing a vehicle traveling in one or more lanes. ;
The point velocity at the second point (hereinafter referred to as'second final point velocity') is measured using 2n laser beams installed at the second point and reflected by each transmitted to one or more lanes, and the 1 A second mobile simultaneous measuring device for generating a vehicle number (hereinafter referred to as a “second vehicle number”) from a second vehicle image generated by photographing a vehicle driving on more than one lane; And
An operation terminal device that calculates a section speed between the first point and the second point by using the first vehicle number and the second vehicle number generated by the first and second portable simultaneous measurement devices;
Including,
The operation terminal device,
A first section in which the average of the first and second final point speeds measured by the first and second portable simultaneous measuring devices is calculated as the first section speed between the first and second points. Speed calculation unit;
If the vehicle corresponding to the first vehicle image and the second vehicle image is the same vehicle, the time at which the first vehicle image is captured, the time at which the second vehicle image is captured, and the distance between the first point and the second point are used. A second section speed calculation unit that calculates a second section speed that is an actual section speed between the first point and the second point; And
For calculating an error rate of the first section speed by using the difference between the first section speed and the second section speed, comparing the first section speed with the second section speed, and correcting the error of the first section speed. A section speed correction value calculating unit that calculates a correction value;
Point speed and section speed simultaneous measurement system comprising a. The method of claim 1,
The first mobile simultaneous measurement device,
A first final point velocity measuring unit for measuring the first final point velocity using a time when the vehicle passes the 2n laser beams and a distance between the 2n laser beams;
A first photographing unit for extracting a license plate area from a vehicle image generated by photographing a vehicle driving on the one or more lanes; And
A first vehicle number recognition unit for recognizing and extracting a first vehicle number from a license plate area extracted from the first photographing unit;
Point speed and section speed simultaneous measurement system comprising a. The method of claim 2,
The first final point speed measurement unit,
A first laser sensor unit that transmits n laser beams toward the front of the vehicle and transmits the remaining n laser beams toward the rear of the vehicle;
(N-1) distance between n laser beams transmitted toward the front of the vehicle and (n-1) distance between the remaining n laser beams transmitted toward the rear, the vehicle is 2n A first temporary point velocity calculating unit that calculates 2 (n-1) temporary point velocities using time points passing through the laser beams; And
A first final point velocity calculating unit that calculates an average of the 2 (n-1) temporary point velocity as the first final point velocity;
Point speed and section speed simultaneous measurement system comprising a. delete The method of claim 1,
The operation terminal device,
Upon receiving the first point velocity measured from the point velocity measuring device, the error rate of the first point velocity is calculated by using the difference between the first final point velocity and the first point velocity, and the first final point velocity and the first point velocity are calculated. A point speed correction value calculating unit comparing one point speed and calculating a correction value for correcting an error of the first point speed;
Point speed and section speed simultaneous measurement system, characterized in that it further comprises. The method of claim 1,
The operation terminal device,
When the traffic information service providing server receives the travel speed between the first point and the second point serviced, the error rate of the travel speed is calculated using the difference between the travel speed and the second section speed, and A travel speed correction value calculating unit comparing two section speeds and calculating a correction value for correcting an error in the travel speed;
Point speed and section speed simultaneous measurement system, characterized in that it further comprises. (A) A first mobile simultaneous measuring device installed at the first point is a point at the first point using 2n laser beams (where n is an integer equal to or greater than 3) each transmitted and reflected by one or more lanes. A vehicle number (hereinafter referred to as a'first vehicle number') from a first vehicle image generated by measuring a speed (hereinafter, referred to as'first final point speed') and photographing a vehicle driving on the one or more lanes. Generating );
(B) The second mobile simultaneous measuring device installed at the second point uses 2n laser beams that are transmitted and reflected to one or more lanes, respectively, and the point speed at the second point (hereinafter referred to as'the second final point speed Measuring') and generating a vehicle number (hereinafter, referred to as'second vehicle number') from a second vehicle image generated by photographing a vehicle driving in the one or more lanes; And
(C) The operation terminal device calculates the section speed between the first point and the second point by using the first vehicle number and the second vehicle number generated by the first and second mobile simultaneous measurement devices. The step of doing;
Including,
In the step (C), the operation terminal device,
(C1) calculating the average of the first and second final point speeds measured by the first and second mobile simultaneous measuring devices as the first section speed between the first and second points. step;
(C2) If the vehicle corresponding to the first vehicle image and the second vehicle image is the same vehicle, the time at which the first vehicle image was photographed and the time at which the second vehicle image was photographed, and between the first point and the second point Calculating a second section speed, which is an actual section speed between the first point and the second point by using the distance; And
(C3) The error rate of the first section speed is calculated using the difference between the first section speed and the second section speed, and the error rate of the first section speed is compared by comparing the first section speed and the second section speed. Calculating a correction value for correction;
Point speed and section speed simultaneous measurement method comprising a. The method of claim 7,
In the step (A), the first mobile simultaneous measuring device,
(A1) measuring the first final point velocity using the time when the vehicle passes the 2n laser beams and the distance between the 2n laser beams;
(A2) when the first final point speed measurement unit recognizes the vehicle, extracting a license plate area from the vehicle image generated by photographing the vehicle driving the one or more lanes; And
(A3) recognizing and extracting the first vehicle number from the license plate area extracted in step (A2);
Point speed and section speed simultaneous measurement method comprising a. The method of claim 8,
In the step (A1), the first mobile simultaneous measuring device,
(A11) transmitting n laser beams toward the front portion of the vehicle, and transmitting and receiving the remaining n laser beams toward the rear portion of the vehicle;
(A12) (n-1) distance between n laser beams transmitted toward the front of the vehicle and (n-1) distance between the remaining n laser beams transmitted toward the rear, vehicle Calculating 2(n-1) first temporary point velocities using the time passing through the 2n laser beams; And
(A13) calculating an average of the 2 (n-1) first temporary point velocities calculated in step (A12) as the first final point velocities;
Point speed and section speed simultaneous measurement method comprising a. delete The method of claim 7,
In the step (C), the operation terminal device,
(C4) When receiving the first point velocity measured from the point velocity measuring device, the error rate of the first point velocity is calculated using the difference between the first final point velocity and the first point velocity, and the first final point Comparing a speed and a first point speed to calculate a correction value for correcting an error of the first point speed;
Method for simultaneously measuring point speed and section speed, characterized in that it further comprises. The method of claim 7,
In the step (C), the operation terminal device,
(C5) When receiving the travel speed between the first point and the second point served by the traffic information service providing server, the error rate of the travel speed is calculated using the difference between the travel speed and the second section speed, and the travel Comparing a speed and a second section speed to calculate a correction value for correcting an error in the travel speed;
Method for simultaneously measuring point speed and section speed, characterized in that it further comprises.

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