KR100478180B1 - Apparatus and method for detecting speed of cars - Google Patents

Abstract

The present invention relates to a vehicle speed detecting method and a device thereof. In particular, when the target road information for collecting the real-time road information is input, the GPS area of the target road is set, and then the mobile phones existing in the GPS area are identified. A predetermined mobile phone identification unit, a location information management database unit for storing / managing time location information of the mobile phones identified by the first mobile phone identification unit, and predetermined location information of the mobile phones identified by the first mobile phone identification unit A movement information that reads at intervals of time and stores / manages the position information in the position information management database unit, and movement information of the mobile phones by analyzing position information for each cell phone stored in the position information management database unit. The driving unit analyzes mobile information determined by the mobile unit determined by the mobile information determination unit and is driving. Calculating average moving speeds of the mobile phones identified by the second mobile phone identification unit based on the second mobile phone identification unit identifying the mobile phones of the passengers in the vehicle, and the mobile information determined by the mobile information determination unit; Including the vehicle speed calculation unit that calculates the average driving speed of the target road from the average moving speed of each mobile phone, the vehicle speed information of the entire national road network can be detected in real time with the minimum construction cost by utilizing the location tracking function of the mobile phone. It works.

Description

Apparatus and method for detecting speed of cars}

The present invention relates to a vehicle speed detection method and apparatus, and more particularly, to a vehicle speed detection method and apparatus using a location tracking function of a mobile phone.

In order to detect real-time vehicle speed on the road, vehicles equipped with speed tracking devices (for example, Global Positioning System (GPS), etc.) (hereinafter referred to as 'special vehicles') are directly applied. After driving the road, it was common to analyze vehicle speed detection information collected from the vehicles, or to use an image collecting device (eg, closed circuit TV (CCTV), etc.) installed around the road.

However, in the former case, it requires a huge cost to have a separate device for speed tracking and a specialized vehicle for mounting the device. In order to collect vehicle speed detection information in real time using these devices, the specialized vehicle operates. The cost is constant. Therefore, the vehicle speed detection method using this method has a disadvantage that the application area is limited.

On the other hand, in the latter case, it can be somewhat compensated for the problems caused by the cost of the former or the limitation of the application area, but it takes a certain cost to equip the CCTV, and to analyze the video information collected through CCTV The disadvantage is that you need to secure equipment or manpower.

In addition, the former and the latter have a disadvantage in that the information collecting target is quite limited in common.

On the other hand, recently, a mobile phone equipped with a GPS chip capable of tracking a location has been released, and a service for providing driving guidance information to a driver having the mobile phone using the mobile phone has been on the line. For example, to determine the location information of the driver from a mobile phone equipped with a GPS chip, and to provide the neighboring geographic information (for example, nearby gas station location information, fast driving route guidance, etc.) based on the location information The service is commercially available.

Accordingly, the present invention is to solve the problem of the conventional real-time vehicle speed detection method, the object of the present invention by using the location tracking function of the mobile phone, the real-time vehicle speed information of the entire national road network at a minimum construction cost The present invention provides a method and apparatus for detecting a vehicle speed that can be detected.

In order to achieve the above object, the vehicle speed detecting method provided by the present invention is configured to identify mobile phones existing in the GPS area after setting the GPS area of the target road when the target road information for collecting real-time road information is input. 1 course; A second step of reading and storing location information of the mobile phones identified in the first step at predetermined time intervals; A third process of determining mobile information for each mobile phone by analyzing location information of the mobile phones stored in the second process; A fourth step of identifying mobile phones of a passenger in a driving vehicle by analyzing movement information for each mobile phone determined in the third step; A fifth process of calculating an average movement speed of the mobile phones identified in the fourth process based on the movement information of each mobile phone determined in the third process, and calculating an average traveling speed of the target road from the average movement speed of each mobile phone; Characterized in that.

In addition, in order to achieve the above object, the vehicle speed detecting apparatus provided by the present invention sets a GPS area of the target road when the target road information for collecting real-time road information is input, and then identifies mobile phones existing in the GPS area. A first mobile phone identification unit; A location information management database unit for storing / managing time-specific location information of the mobile phones identified by the first mobile phone identification unit; A location information management unit for reading the location information of the mobile phones identified by the first mobile phone identification unit at predetermined time intervals and storing / managing the location information in the location information management database unit; A mobile information determination unit for analyzing mobile phone location information stored in the location information management database unit to determine mobile information of mobile phones; A second mobile phone identification unit for analyzing mobile phone information determined by the mobile information determination unit to identify mobile phones of a passenger in a driving vehicle; The vehicle speed calculates the average moving speed of the mobile phones identified by the second mobile phone identification unit based on the mobile information determined by the mobile information determination unit and calculates the average driving speed of the target road from the average moving speed of each mobile phone. Characterized in that it comprises a calculation unit.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a vehicle speed detecting method and a device provided by the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic block diagram of an apparatus for detecting a vehicle speed according to an embodiment of the present invention. Referring to FIG. 1, a vehicle speed detecting apparatus according to an embodiment of the present invention includes a first mobile phone identification unit 110, a location information management unit 120, a mobile information determination unit 130, and a second mobile phone identification. The unit 140, the vehicle speed calculation unit 150, and the road information management unit 160 is included.

When the target road information for collecting real-time road information is input, the first mobile phone identification unit 110 sets a GPS area of the target road and then identifies mobile phones existing in the GPS area. To this end, the first mobile phone identification unit 110 interworks with a geographic information system (GIS) 10 and a base station 20 for providing a mobile communication service.

At this time, the target road information input to the first mobile phone identification unit 110 is input by a person (for example, a system administrator, etc.) who wants to grasp the vehicle flow on the target road through the vehicle speed detecting apparatus of the present invention, or this is necessary. A system (for example, a driving guidance system, etc.) is automatically input, and the form of the target road information is not limited, but it is preferable to apply a method which is generally implemented in a system such as a GIS. The function of the first mobile phone identification unit 110 for such processing is not a characteristic of the present invention, and since it is a known technology, a detailed description thereof will be omitted.

When predetermined target road information for collecting road information is input to the first mobile phone identification unit 110 using such a method, first, the first mobile phone identification unit 110 enters into a preset geographic information system 10. Based on the above, the GPS coordinates of the target road are calculated. At this time, the method for calculating the GPS coordinates from predetermined predetermined area information (eg, target road information, etc.) utilizes a known method. On the other hand, the method for calculating the GPS coordinates as described above is obvious to those skilled in the art, so the description of a specific process is omitted in the present specification.

In addition, the first mobile phone identification unit 110 selects base station information that manages the mobile phone of the target road or the area including the target road among the base stations of the mobile communication companies to identify the mobile phones via the base stations. At this time, the base station information for the mobile phone of the target road or the area including the target road can be obtained through the information registered in the GIS 10. If the base station information is thus obtained, the first mobile phone identification unit 110 ) Is to connect the communication to the base station 20 to obtain information about the mobile phones via the base station (20).

On the other hand, when the base station information screening, the exclusive mobile phone base station of the subway user overlapping the target road is excluded.

When the mobile phones via the base station 20 are identified as described above, the first mobile phone identification unit 110 converts the location information of the mobile phone to GPS coordinates by using a location tracking device (for example, a GPS chip) installed in the mobile phone. Then, the GPS coordinates of the mobile phone and the GPS coordinates of the target road are compared to identify mobile phones existing in the GPS area of the target road.

2A is an exemplary view illustrating a GPS region setting result of a target road according to an embodiment of the present invention. Referring to FIG. 2A, the portion 30 indicated by the thick line is set as the GPS area of the target road. At this time, both predetermined areas δ of the target road were included as the target road area, because the GPS coordinates typically included technical errors (about 10m: in the first half of 2002). Due to this error, the first mobile phone identification unit 110 commits an error in which not only the mobile phone existing on the target road but also the mobile phone of a building or a pedestrian around the target road exists on the road. However, the error value δ of the GPS coordinates will be reduced to smaller and smaller values with the development of GPS technology. In addition, in the present invention, the second mobile phone identification unit 140, which will be described later, performs a process of identifying only the mobile phone of the vehicle occupant. Therefore, in the present invention, it is possible to minimize the error in the vehicle speed detection due to the error of the GPS coordinates.

The location information management DB 170 receives and stores / manages the location-specific location information of the mobile phones identified by the first mobile phone identification unit 110 from the location information management unit 120 and, in particular, reads the location information of each mobile phone. Stores and manages information and GPS coordinate information of each cell phone read at each time.

The location information management unit 120 reads the location information of the mobile phones identified by the first mobile phone identification unit 110 at predetermined time intervals and stores / manages the result in the location information management DB 170.

2B is an exemplary view showing a mobile phone location information collection result according to an embodiment of the present invention. Referring to FIG. 2B, a location information management unit 120 includes a predetermined time interval t1 and t2 in the location information management DB 170. , location information (Location_11, Location_12, ..., Location_1n, Location_21, Location_22, ..., Location_2n, Location_31, ...) of the mobile phones (hp1, hp2, ..., hpn) detected by, t3, ... is stored. At this time, each location information is preferably stored in the form of (x, y) coordinates.

FIG. 2C is a diagram illustrating a location movement path of mobile phones located near a road according to an embodiment of the present invention. In particular, five mobile phones (hp1, hp2, hp3, hp4, hp5) are located on and around a target road. In the case where the location information of the mobile phones has been collected four times, the movement paths of the mobile phones are shown. At this time, there are two mobile phones (hp3 and hp4) present on the target road, but the mobile phones (hp1, hp2 and hp5) located in the vicinity thereof also show the movement paths, as mentioned in the description with reference to FIG. 2A. This is because the first mobile phone identification unit 110 determines the target road 40 to a predetermined area outside the target road 40 due to a general error of the GPS coordinates. On the other hand, Figure 2d is an exemplary view showing the location information collection results of the mobile phone shown in Figure 2c, the location information of each mobile phone in the form of (x, y) coordinates.

The movement information determination unit 130 determines the movement information of the mobile phones by analyzing the time-based location information of the mobile phones stored in the location information management DB 170 as illustrated in FIG. 2D. That is, by analyzing the location information for each mobile phone stored in the location information management DB 170 to calculate the moving speed for each mobile phone, determine the moving direction for each mobile phone and whether or not the movement persistence.

At this time, there are a number of ways to calculate the moving speed of a particular mobile phone will be described as follows.

For example, when calculating the moving speed of a specific mobile phone from k measurement data, each measurement time point is called t_1, t_2, ..., t_k, and the position of the mobile phone at each measurement time point is (x_1, y_1), (x_2, y_2), ..., (x_k, y_k), the moving speed of the mobile phone can be divided by the required time considering only the time t_1 and the time t_k.

Therefore, if the mobile phone has moved in a straight line, the speed of the mobile phone can be calculated simply as in Equation (1).

However, if the mobile phone does not move in a straight line, the coordinates of points rotated by a certain angle are separated to obtain a total driving distance from them. That is, if we start at (x_1, y_1), rotate at (X_1, Y_1), (X_2, Y_2), ..., (X_i, Y_i) and then reach (x_k, y_k), The formula for calculating the speed of the mobile phone is as shown in (Equation 2).

On the other hand, in the case where the derivation of the turning point is ambiguous, the measurement time interval is further reduced to calculate the driving distance as accurately as possible. For example, in FIG. 2D, the moving speed of the mobile phone hp3 in the t1 to t4 time interval is expressed by Equation 3 below.

In addition, the moving speed of the mobile phone hp1 is equal to (Equation 4).

The second mobile phone identification unit 140 analyzes mobile information for each mobile phone determined by the mobile information determination unit 130 to identify mobile phones of passengers in the driving vehicle. To this end, the second mobile phone identification unit 140 analyzes the mobile phone direction, mobile phone speed and mobile phone persistence determined by the mobile information determination unit 130, respectively, and based on the result, Identify the passenger's mobile phone. For example, as a result of the analysis, when the moving direction for each cell phone is constant along the target road, or when the moving speed for each cell phone is faster than the predetermined moving speed, or when the moving durability for each cell phone is longer than the predetermined moving duration. If one or more of the cases is applicable, the second mobile phone identification unit 140 identifies the mobile phone as a mobile phone candidate of a passenger in the vehicle that is driving. Of these candidates, candidates that are too different from other candidates in the cell phone (for example, candidates that constantly move along the target road but are too slow in motion or speed compared to other candidates, similar to other candidates in speed but too short in duration) In other words, it is judged that the mobile phone of the vehicle occupant is the last except for a candidate having too long speed and moving sustainability. In this case, the moving speed set for identifying the mobile phone of the occupant in the driving vehicle is set based on the average walking speed of the pedestrian, and the moving duration is based on a sufficiently long time in consideration of the long moving duration of the vehicles. It is preferable to set to. For example, if the movement duration is set to 10 minutes, only mobile phones that have moved more than 10 minutes are included in the measurement object. On the other hand, if the movement duration standard is long and the length of interest road is short, it should be judged by the cell phone of the vehicle occupant after watching through several interest roads. Therefore, after observing the movement pattern of the vehicle, it is possible to variably set the optimal reference time according to the region.

The vehicle speed calculation unit 150 calculates an average moving speed of the mobile phones identified by the second mobile phone identification unit 140 based on the mobile information determined by the mobile information determining unit 130 and the average moving speed of each mobile phone. The average driving speed of the target road is calculated from That is, by extracting the moving speed for each of the mobile phones identified as the mobile phone of the passenger in the vehicle in the second mobile phone identification unit 140 from the location information management DB 170 to calculate the average moving speed of the mobile phones, The average driving speed of the subject road is calculated. This is because the average moving speed of a mobile phone means the average driving speed of the vehicle in which the mobile phone holder is boarded.

However, there may occur a case where the average moving speeds of the mobile phones calculated by the vehicle speed calculating unit 150 are not uniform. For example, when there is an intersection in the front or an access road on another road, the average moving speed of the mobile phones may be different for each lane of the target road due to the traffic congestion in a specific lane.

In this case, the vehicle speed calculating unit 150 classifies the vehicles passing through the target road into predetermined groups based on the average moving speeds of the mobile phones and the moving direction information, and then calculates the average driving speeds of the groups. The average driving speed for each lane of the target road is calculated. In this case, since the average moving speed of the mobile phone is the same concept as the moving speed of the vehicle carried by the mobile phone holder, classifying the vehicles passing through the target road into a predetermined group is equivalent to classifying the mobile phones into the predetermined group. It is Eliminate statistical outsiders in this process. For example, an ambulance or quick-service motorcycle in the city is likely to be abnormally faster than the speed of a typical cell phone. These statistical outsiders are excluded from the speed calculation.

The road information management unit 160 receives the driving speeds for the vehicles traveling on the target road from the vehicle speed calculating unit 150, grasps the vehicle flow on the target road, and outputs the result to the driving guide system or the traffic information guide system. Make it available.

3 to 6 show a vehicle speed detection process using such a vehicle speed detection device according to an embodiment of the present invention.

First, FIG. 3 is a flowchart illustrating a method for detecting a vehicle speed according to an embodiment of the present invention. Referring to Figure 3, the vehicle speed detection method according to an embodiment of the present invention is as follows. First, when target road information for collecting real-time road information from the outside is input (s100), the vehicle speed detecting apparatus sets a GPS area of the target road and then identifies mobile phones existing in the GPS area (s200). The processing at this time will be described in more detail in the description with reference to FIG. 4.

When the mobile phones existing in the GPS area are identified as described above, the vehicle speed detecting apparatus reads and stores the location information of the mobile phones identified in the process S200 at predetermined time intervals (S300). At this time, the vehicle speed detecting apparatus constructs a mobile phone mobile information management DB including time information of reading the location information of the mobile phones and GPS coordinate information for each mobile phone read at each time. Since the configuration example of such a mobile information management DB is mentioned in FIG. 2B and the description with reference thereto, the description of the configuration is omitted.

On the other hand, if the location information of each mobile phone is stored in the DB, the vehicle speed detection device analyzes the location information of the mobile phones stored in the DB to determine the mobile information for each mobile phone (S400). Then, the result is stored in the mobile information management DB.

Then, the vehicle speed detecting apparatus analyzes the mobile information for each mobile phone stored in the mobile information management DB to identify the mobile phones of the occupants in the driving vehicle (s500). At this time, the identification criteria for identifying the mobile phone of the occupant in the driving vehicle may be the movement direction of the mobile phone, the moving speed and the durability of the mobile phone. For example, the vehicle speed detecting apparatus analyzes the movement direction of each mobile phone, and if the movement direction is constant along the target road, judges that the mobile phone is a candidate for the mobile phone of the occupant in the driving vehicle, or analyzes the movement speed for each mobile phone. If the moving speed is faster than the predetermined predetermined moving speed, the mobile phone is determined to be a mobile phone candidate of a passenger in the driving vehicle. Alternatively, the vehicle speed detecting apparatus analyzes the mobile persistence for each mobile phone and determines that the mobile phone is a candidate for a cell phone of the occupant in the driving vehicle when the mobile persistence is longer than a predetermined predetermined travel duration. Of these candidates, the remaining ones except for candidates that are too different from other candidate mobile phones are finally determined to be the mobile phone of the vehicle occupant.

As such, if only the mobile phone of the occupant of the mobile vehicle around the target road is identified, the vehicle driving speed of the target road is calculated based on the movement information of the mobile phones (s600). That is, the average moving speed of the mobile phones identified in the process s500 is calculated, and the value is determined as the average driving speed of the target road. This is because the moving speed of the mobile phone has the same meaning as the traveling speed of the vehicle in which the mobile phone holder boards.

4 is a flowchart illustrating a mobile phone identification process s200 located around a target road according to an exemplary embodiment of the present invention. Referring to FIG. 4, in order to identify a mobile phone located near the target road, the vehicle speed detecting apparatus first sets a GPS area of the target road (S210). That is, GPS coordinates of the target road are calculated based on preset geographic information. As described above, a method for setting a GPS area of a predetermined area by using GIS information is already known, and thus, a detailed description thereof will be omitted.

On the other hand, the base station information for the mobile phone of the target road or the area including the target road among the base stations of the mobile communication company is selected (S220). At this time, the exclusive mobile phone base station of the subway user overlapping the target road is excluded. After identifying the mobile phones passing through the base station, the location information of the mobile phones is analyzed to calculate the GPS coordinates of the area where each mobile phone is located (S230). Since the method of selecting the base station information and the method of identifying the mobile phones via the base station are mentioned in the description of the first mobile phone identification unit 110 with reference to FIG. 1, detailed description thereof will be omitted.

When the GPS coordinates of the target road and the GPS coordinates of the mobile phones around the target road are calculated as described above, a process of identifying the mobile phones existing in the GPS region of the target road is performed by comparing the values (S240). That is, mobile phones located within the GPS coordinate range of the target road are identified and the mobile phones are listed.

5 is a flowchart illustrating a process of determining mobile information movement (S400) of a mobile phone according to an exemplary embodiment of the present invention. Referring to FIG. 5, in order to determine movement information of a mobile phone, a moving speed for each mobile phone is calculated based on time location information of each mobile phone stored as illustrated in FIG. 2D (s410), and a moving direction for each mobile phone is determined (s410). S420), a process of determining mobile persistence for each mobile phone is performed (S430). Then, the analysis results are stored in the mobile information management DB (s440). At this time, the mobile information stored in each of the mobile phones is referred to by the vehicle speed detecting apparatus when calculating the average moving speed of the mobile phones.

6 is a flowchart illustrating a process of calculating a vehicle driving speed s600 of a target road according to an embodiment of the present invention. Referring to FIG. 6, the average driving speed of the target road is calculated from the average moving speeds of the mobile phones existing in the GPS region of the target road (S610). Then, it is checked whether the average driving speed of the vehicles is uniform (S620), and if the average driving speed is uniform, the average driving speed is determined as the driving speed of the target road (S670). In this case, since the average running speed is practically rare, a predetermined range for determining whether the average running speed of the vehicles is uniform is set so that the average running speed of the vehicles is within the range. It is desirable to determine that the average running speed is uniform.

On the other hand, if not, check whether the vehicle driving speed calculation mode (option) is set for each lane (s630), and if the vehicle driving speed calculation mode for each lane is set, determining the vehicle driving speed for each lane (s640 to s660). That is, based on the moving direction and the moving speed of the vehicles determined by the mobile information of the mobile phone, each vehicle is classified into a predetermined group (s640), and the vehicle moving path for each group is tracked (s650) to calculate the driving speed for each lane. (S660). The result is determined as the vehicle driving speed on the target road (s670). For example, if a straight signal is turned on at an intersection, vehicles waiting for a signal to turn left will be congested, and vehicles going straight or to turn right will show a smooth flow. Therefore, the series of processes s640 to s660 are for determining the vehicle driving speed for each lane showing different vehicle flows in this case.

The above description is merely an example of an embodiment, and the present invention is not limited to the above-described embodiment and can be variously changed within the scope of the appended claims. For example, the shape and structure of each component specifically shown in the embodiment of the present invention can be modified.

The vehicle speed detecting method and apparatus provided by the present invention collect road information based on a location tracking system of a mobile phone which is already constructed, and thus do not have to provide expensive equipment such as a specific vehicle or CCTV for collecting road information. It has the advantage of being. In addition, since the present invention can be used anywhere where the mobile phone location tracking system is provided, the vehicle speed information of the entire national road network can be detected in real time, and it can be extended to an overseas road information collection system. That is, there is an effect that can detect a wide range of vehicle speed at a minimum cost.

On the other hand, by utilizing the real-time road information collected in the present invention in the driving guidance system may calculate the shortest time path to the destination requested by the driver and provide it to the driver, or may be used as information for road guidance such as traffic broadcasting. will be.

delete

1 is a schematic block diagram of an apparatus for detecting a vehicle speed according to an embodiment of the present invention;

2A is an exemplary view illustrating a GPS region setting result of a target road according to an embodiment of the present invention;

Figure 2b is an exemplary view showing a mobile phone location information collection result according to an embodiment of the present invention,

Figure 2c is a view showing a location movement path of the mobile phones located around the road according to an embodiment of the present invention,

Figure 2d is an exemplary view showing the location information collection results of the mobile phones shown in Figure 2c,

3 is a flowchart illustrating a method for detecting a vehicle speed according to an embodiment of the present invention;

4 is a flowchart illustrating a mobile phone identification process located around a target road according to an embodiment of the present invention;

5 is a flowchart illustrating a process of determining movement information of a mobile phone according to an embodiment of the present invention;

6 is a flowchart illustrating a process of calculating a vehicle driving speed on a target road according to an embodiment of the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

110: first mobile phone identification unit 120: location information management unit

130: mobile information determination unit 140: second mobile phone identification unit

150: vehicle speed calculation unit 160: road information management unit

170: location information management DB

Claims (12)

delete A first step-1 of calculating GPS coordinates of the target road based on preset geographic information when the target road information for collecting real-time road information is input; Steps 1-2 of selecting base station information that manages the mobile phone of the target road or the area including the target road among the base stations of the mobile communication company; Steps 1-3 of identifying mobile phones via the base stations selected in step 1-2; Analyzing the location information of the mobile phones identified in step 1-3 and calculating GPS coordinates of the area where the mobile phones are located; A first to fifth step of identifying mobile phones existing in the GPS region of the target road by comparing the GPS coordinates of the target road calculated in step 1-1 with the GPS coordinates of the mobile phones calculated in step 1-4; , A second process of reading and storing location information of the mobile phones identified in the first process at a predetermined time interval; A third process of determining location information of each mobile phone by analyzing location information of the mobile phones stored in the second process; A fourth process of identifying mobile phones of a passenger in a driving vehicle by analyzing the mobile information for each mobile phone determined in the third process; A fifth process of calculating an average movement speed of the mobile phones identified in the fourth process based on the movement information of each mobile phone determined in the third process, and calculating an average traveling speed of the target road from the average movement speed of each mobile phone; Vehicle speed detection method characterized in that. The method of claim 2, If the average moving speed of the mobile phones calculated in the fifth process is not uniform, The vehicle passing through the target road is classified into a predetermined group based on the mobile information determined by the mobile phone determined in the third process, and then the average driving speed for each group is calculated and the lanes of the target road are based on the result. And a sixth process of calculating an average driving speed. The method of claim 2 or 3, wherein the second process is And a mobile phone movement information management database including time information on reading the position information of the mobile phones and GPS coordinate information for each mobile phone read at each time. The method of claim 2 or 3, wherein the third process Vehicle speed detection method, characterized in that for calculating the moving speed for each mobile phone by analyzing the location information of the mobile phones stored in the second process and determine the moving direction and the persistence of each mobile phone. The method of claim 2 or 3, wherein the fourth process By analyzing the movement direction per cell, the movement speed per cell and the movement persistence per cell, if the movement direction for each cell phone is constant along the target road, or if the movement speed for each cell phone is faster than the predetermined predetermined speed, or for each cell phone And if the mobile persistence is longer than one preset time, determining the mobile phone as a candidate for a mobile phone of the occupant in the driving vehicle. delete When the target road information for collecting real-time road information is input, the GPS coordinates of the target road are calculated based on preset geographic information, and the base station of the mobile communication companies of the target road or the area including the target road is included. A first mobile phone identification unit that selects base station information that manages mobile phones, identifies mobile phones passing through the base stations, and identifies mobile phones existing within the GPS area of the target road among the mobile phones; A location information management database unit for storing / managing time location information of the mobile phones identified by the first mobile phone identification unit; A location information management unit for reading the location information of the mobile phones identified by the first mobile phone identification unit at predetermined time intervals and storing / managing the location information in the location information management database unit; A mobile information determination unit for analyzing mobile phone location information stored in the location information management database unit to determine mobile information of mobile phones; A second mobile phone identification unit for analyzing mobile phone information determined by the mobile information determination unit to identify mobile phones of a passenger in a driving vehicle; The vehicle speed calculates the average moving speed of the mobile phones identified by the second mobile phone identification unit based on the mobile information determined by the mobile information determination unit and calculates the average driving speed of the target road from the average moving speed of each mobile phone. Vehicle speed detection apparatus comprising a calculation unit. The method of claim 8, wherein the location information management unit And time information reading the location information of the mobile phones and GPS coordinate information for each mobile phone read at each time. The method of claim 8, wherein the movement information determination unit Vehicle speed detection device, characterized in that for calculating the moving speed for each mobile phone by analyzing the location information for each mobile phone stored in the location information management database unit and determine the moving direction and the persistence for each mobile phone. The method of claim 10, wherein the second mobile phone identification unit Analyzing the movement direction for each cell phone, the movement speed for each cell phone, and the movement persistence for each cell phone determined by the movement information determination unit, when the movement direction for each cell phone is constant along the target road, or the movement speed for each cell phone is a predetermined speed. The vehicle speed detection apparatus, characterized in that the mobile phone is identified as a mobile phone of the occupant in the vehicle that is driving, if it is faster, or if at least one of the cases where the mobile persistence for each mobile phone is longer than a predetermined time. The method of claim 8, wherein the vehicle speed calculation unit If the average moving speed of the mobile phones is not uniform, the vehicles passing through the target road are classified into predetermined groups based on the mobile information for each mobile phone determined by the mobile information determining unit, and then the average driving speed for each group is determined. And calculating an average driving speed for each lane of the target road based on the result.