KR102441074B1 - Apparatus for revising vehicle speed and method thereof - Google Patents

Abstract

The present invention relates to an apparatus and method for compensating for a vehicle speed, and determines with high accuracy whether there is an error in the speed measured by a speedometer of the vehicle, and if there is an error in the speed, a reference obtained in various ways To provide a vehicle speed correction device and method that can stably maintain the accuracy of comprehensive traffic management and vehicle autonomous driving service using cloud computing by providing correction information that can correct the speed based on the speed do.
To this end, in the present invention, in the vehicle speed correction device, the vehicle speed (hereinafter, the first speed), the first location information obtained from the vehicle navigation, and the second location information obtained from the driver's smartphone periodically a vehicle communication unit for receiving; and calculating a second speed using the periodically received first location information based on the electronic map data, calculating a third speed using the periodically received second location information, and using the first speed as the second speed. and a controller for sequentially comparing the second speed and the third speed to determine an error of the first speed, and correcting the first speed at which the error occurs based on the third speed.

Description

Apparatus for speed compensating vehicle and method therefor

The present invention relates to an apparatus and method for correcting a vehicle speed, and more particularly, to determine with high accuracy whether there is an error in the speed measured by a speedometer of the vehicle, and correcting the error if there is an error in the speed. It relates to a technology that provides correction information for

Cloud computing refers to a technology that integrates and provides resources of computers in different physical locations with virtualization technology. That is, a user can use a computing resource with any terminal anytime, anywhere as long as it is a space accessible to the Internet through cloud computing.

Recently, as the technology for wireless networks is advanced and the performance of mobile terminals is improved, cloud computing is creating new business by combining with mobile. In other words, with the advent of mobile terminals such as telematics terminals, smart phones, and tablet PCs and the spread of high-speed wireless Internet, users can search for information anytime and anywhere, as well as utilize mobile applications.

With the advent of telematics terminals, smartphones, and tablet PCs that can easily access the wireless Internet, personal computing environments are moving from fixed PCs to mobile web-based mobile terminals. In particular, mobile cloud services, which are newly emerging along with the mobile web, combine cloud computing with existing mobile services, and are being applied to services centered on sharing resources such as data and applications.

These cloud computing services are also applied to vehicles, and various cloud computing services are provided based on speed data collected from the vehicle.

Because the conventional cloud computing service provides services based on the speed measured by the vehicle's speedometer, if an error occurs in the speed measured by the vehicle's speedometer, the cloud computing is used for comprehensive traffic management and vehicle autonomous driving services. There is a problem in that accuracy cannot be stably maintained.

Therefore, there is a need for a method for determining with high accuracy whether there is an error in the speed measured by the vehicle speedometer and correcting the error if there is an error.

Republic of Korea Patent No. 10-0918119

The present invention, which has been proposed to meet the above needs, determines with high accuracy whether there is an error in the speed measured by the speedometer of the vehicle, and if there is an error in the speed, based on the reference speed obtained in various ways An object of the present invention is to provide a vehicle speed correction device and method for stably maintaining the accuracy of comprehensive traffic management and vehicle autonomous driving service using cloud computing by providing correction information capable of correcting the speed. .

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned may be understood by the following description, and will be more clearly understood by the examples of the present invention. It will also be readily apparent that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the appended claims.

The apparatus of the present invention for achieving the above object, in the vehicle speed correction device, includes the vehicle speed (hereinafter, first speed), first location information obtained from the vehicle navigation system, and the first location information obtained from the driver's smartphone. 2 a vehicle communication unit for periodically receiving location information; and calculating a second speed using the periodically received first location information based on the electronic map data, calculating a third speed using the periodically received second location information, and using the first speed as the second speed. and a controller for sequentially comparing the second speed and the third speed to determine an error of the first speed, and correcting the first speed at which the error occurs based on the third speed.

Here, the control unit may generate correction information according to the relationship between the first speed and the third speed, and then transmit it to the vehicle terminal through the vehicle communication unit.

In addition, if the difference between the first speed and the second speed is out of the effective range, the control unit first determines that an error has occurred in the first speed, and the difference between the first speed and the third speed is within the effective range If it is out of , it may be finally determined that an error has occurred in the first speed.

Also, the second location information may be GPS information compensated based on base station information.

Another device of the present invention for achieving the above object is, in the vehicle speed correction device, the vehicle speed (hereinafter, first speed), first location information obtained from the vehicle navigation system, and obtained from the driver's smartphone a vehicle communication unit periodically receiving second location information; a server communication unit for receiving the image of the vehicle in real time; and calculating a second speed using the periodically received first location information based on the electronic map data and calculating a third speed using the periodically received second location information, based on the image of the vehicle to calculate the speed of the vehicle (hereinafter, the fourth speed), sequentially compare the first speed with the second speed and the third speed to determine an error of the first speed, and determine the first speed at which the error occurred and a control unit for correcting based on the fourth speed.

Here, the control unit may generate correction information according to the relationship between the first speed and the fourth speed, and then transmit it to the vehicle terminal through the vehicle communication unit.

In addition, if the difference between the first speed and the second speed is out of the effective range, the control unit first determines that an error has occurred in the first speed, and the difference between the first speed and the third speed is within the effective range If it is out of , it may be finally determined that an error has occurred in the first speed.

Also, the second location information may be GPS information compensated based on base station information.

Another device of the present invention for achieving the above object is, in the vehicle speed correction device, the speed of the corresponding vehicle (hereinafter, the first speed) from a plurality of vehicle terminals, and first location information obtained from the navigation of the corresponding vehicle , a vehicle communication unit for periodically receiving the second location information, the speed of the preceding vehicle, and the identification information of the vehicle obtained from the smartphone of the driver of the vehicle; a server communication unit for receiving information about a vehicle following the target vehicle; and calculating a second speed using the periodically received first location information based on the electronic map data and calculating a third speed using the periodically received second location information, and a vehicle following the target vehicle. Specifies the speed of which preceding vehicle is the speed of the target vehicle based on the information on and a controller for correcting the generated first speed based on the speed of the target vehicle.

Here, the control unit may generate correction information according to the relationship between the first speed and the speed of the target vehicle and then transmit it to the vehicle terminal through the vehicle communication unit.

In addition, if the difference between the first speed and the second speed is out of the effective range, the control unit first determines that an error has occurred in the first speed, and the difference between the first speed and the third speed is within the effective range If it is out of , it may be finally determined that an error has occurred in the first speed.

Also, the second location information may be GPS information compensated based on base station information.

The method of the present invention for achieving the above object, in the vehicle speed correction method, the speed of the corresponding vehicle from a plurality of vehicle terminals (hereinafter, the first speed), the first location information obtained from the navigation of the vehicle, the corresponding Periodically receiving the second location information, the speed of the preceding vehicle, and the identification information of the vehicle obtained from the smartphone of the vehicle driver; Receiving information about a vehicle following the target vehicle and an image of the target vehicle; calculating a second speed using the periodically received first location information of the target vehicle based on the electronic map data and calculating a third speed using the periodically received second location information of the target vehicle; calculating a speed (hereinafter, a fourth speed) of the vehicle based on the image of the target vehicle; specifying whether the speed of the target vehicle (hereinafter referred to as a fifth speed) from among the speeds of the preceding vehicle based on information on the following vehicle of the target vehicle; determining an error in the first speed of the target vehicle by sequentially comparing the first speed with the second speed and the third speed; and correcting the first speed at which the error occurred based on any one of the third speed, the fourth speed, and the fifth speed.

Here, the correction step may include: generating correction information according to a relationship between any one of the third speed, the fourth speed, and the fifth speed and the first speed; and transmitting the correction information to the vehicle terminal.

In addition, the step of determining the error may include: if the difference between the first speed and the second speed is out of an effective range, first determining that an error has occurred in the first speed; and finally determining that an error has occurred in the first speed when the difference between the first speed and the third speed is out of an effective range.

Also, the second location information may be GPS information compensated based on base station information.

In the present invention as described above, it is determined with high accuracy whether there is an error in the speed measured by the speedometer of the vehicle, and if there is an error in the speed, the speed is corrected based on the reference speed obtained in various ways By providing correction information that can be used, it has the effect of stably maintaining the accuracy of comprehensive traffic management and autonomous vehicle operation services using cloud computing.

In addition, the present invention has the effect of preventing the provision of erroneous information, control errors, planning errors, etc. that may occur in the comprehensive traffic management and vehicle autonomous driving service using cloud computing.

1 is a configuration diagram of an embodiment of a speed correction system for a vehicle to which the present invention is applied;
2 is an exemplary view of a road environment for explaining the function of the vehicle speed correction device according to the present invention;
3 is a configuration diagram of an embodiment of a vehicle speed compensating device according to the present invention;
4 is an exemplary view for explaining a process in which the vehicle speed compensating device according to the present invention calculates the vehicle speed;
5 is a flowchart illustrating a vehicle speed correction method according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. In addition, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

1 is a configuration diagram of an embodiment of a speed correction system for a vehicle to which the present invention is applied.

First, the vehicle terminal 10 includes a communication interface module with the vehicle speed compensating device 20 and provides a function of interworking with an AVN (Audio Video Navigation) system mounted on the vehicle. In this case, the AVN system may provide Bluetooth pairing with the driver's smartphone. Accordingly, the vehicle terminal 10 may obtain location information (GPS information) from the vehicle navigation, as well as location information (GPS information) from the driver's smartphone. Here, the vehicle navigation system and the smart phone each have a GPS receiver.

Also, the vehicle terminal 10 may include a short-range communication module to directly perform Bluetooth pairing with the driver's smartphone.

Also, the vehicle terminal 10 may obtain speed information from a vehicle cluster (or speedometer) through a vehicle network. In this case, the vehicle network includes a Controller Area Network (CAN), a Local Interconnect Network (LIN), FlexRay, Media Oriented Systems Transport (MOST), and the like.

Also, the vehicle terminal 10 may match the vehicle speed information, the navigation GPS information, and the smartphone GPS information to each other and periodically (for example, 1 second) transmit it to the vehicle speed correction device 20 . Here, the mutual matching means that the time at which the vehicle speed is obtained, the time at which the navigation GPS information is obtained, and the time at which the GPS information of the smartphone is obtained are the same time. In this case, the smartphone GPS information may be GPS information compensated based on base station information of a wireless network.

Also, the vehicle terminal 10 may calculate the speed of the vehicle using a vehicle speed sensor (VSS). For example, if the VSS generates four square waves during one wheel revolution, the moving distance per hour (vehicle speed) can be calculated by multiplying the moving distance during one revolution based on the dynamic load radius of the wheel by 4.

In addition, since the vehicle terminal 10 is equipped with a smart cruise control (SCC) system, the speed of the preceding vehicle may be measured through a radar sensor mounted on the front of the vehicle. In this case, the vehicle terminal 10 may periodically transmit speed information of the preceding vehicle to the vehicle speed compensating device 20 . Of course, when receiving a request from the vehicle speed compensating device 20 , the vehicle terminal 10 may transmit speed information of the preceding vehicle to the vehicle speed compensating device 20 .

For example, the vehicle terminal 10 may be implemented as a telematics terminal, and may include a broadcast receiving module, a mobile communication module, a wireless Internet module, and a short-range communication module.

The broadcast receiving module receives a broadcast signal and/or broadcast related information from an external broadcast management server through a broadcast channel. The broadcast channel may include a satellite channel and a terrestrial channel.

The mobile communication module includes technical standards or communication methods for mobile communication (eg, Global System for Mobile communication (GSM), Code Division Multi Access (CDMA), Code Division Multi Access 2000 (CDMA2000), Enhanced EV-DO (EV-DO) Voice-Data Optimized or Enhanced Voice-Data Only), Wideband CDMA (WCDMA), High Speed Downlink Packet Access (HSDPA), High Speed Uplink Packet Access (HSUPA), Long Term Evolution (LTE), Long Term Evolution-Advanced (LTEA) ), etc.), transmits and receives a radio signal to and from at least one of a base station, an external terminal, and a server Here, the wireless signal may include various types of data according to transmission and reception of a voice call signal, a video call signal, or a text/multimedia message.

The wireless Internet module refers to a module for wireless Internet access, and is configured to transmit and receive wireless signals in a communication network according to wireless Internet technologies. Examples of wireless Internet technologies include WLAN (Wireless LAN), Wi-Fi (Wireless-Fidelity), Wi-Fi (Wireless Fidelity) Direct, DLNA (Digital Living Network Alliance), WiBro (Wireless Broadband), WiMAX (World Interoperability) for Microwave Access), HSDPA (High Speed Downlink Packet Access), HSUPA (High Speed Uplink Packet Access), LTE (Long Term Evolution), LTE-A (Long Term Evolution-Advanced), etc. Data is transmitted/received according to at least one wireless Internet technology in the range including Internet technologies not listed in .

The short range communication module is for short range communication, and includes Bluetooth™, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wide Band (UWB), ZigBee, NFC (Near). Field Communication), Wi-Fi (Wireless-Fidelity), Wi-Fi Direct, and Wireless USB (Wireless Universal Serial Bus) technology may be used to support short-distance communication.

Next, the vehicle speed correction device 20 according to the present invention may be implemented as a kind of server connected to a network, and communicates with the vehicle terminal 10 and the traffic control server 30 to correct various types of vehicle speed. information can be collected.

In particular, the vehicle speed correction device 20 determines with high accuracy whether there is an error in the speed measured by the speedometer of the vehicle, and if there is an error in the speed, based on the reference speed obtained in various ways The speed can be corrected. Also, the vehicle speed compensating device 20 may generate a correction equation for correcting the speed and provide it to the vehicle terminal 10 .

For example, the correction equation is a formula for matching the vehicle speed to the reference speed. When the vehicle speed (A) is 100 km/h and the reference speed (B) is 90 km/h, the correction equation is 10 km from the vehicle speed (A). It can be in the form of subtracting /h.

In addition, the vehicle speed compensating device 20 is provided with the electronic map data, so it is possible to detect the driving distance between the GPS coordinates of two points. Here, the mileage does not mean a straight-line distance between the GPS coordinates of two points, but means a distance between the GPS coordinates of two points on a path (road) on which the vehicle can move.

Also, the vehicle speed compensating device 20 may calculate the vehicle speed by using a distance based on two GPS coordinates and a transmission period of the GPS coordinates on a path (road) through which the vehicle can move.

For example, if the transmission period of the GPS coordinates transmitted from the vehicle terminal 10 is 1 second and the distance between the first GPS coordinates and the second GPS coordinates on the road is 30 m, the speed of the vehicle is 108 km/h.

Also, the vehicle speed compensating device 20 may calculate the speed of the specific vehicle from the image of the specific vehicle provided from the traffic control server 30 . That is, the vehicle speed compensator 20 may detect the vehicle in the image and calculate the speed of the vehicle based on the moving distance per hour of the vehicle in the image.

The vehicle speed compensating device 20 may be mounted on the vehicle.

Next, the traffic control server 30 controls a surveillance camera (CCTV) installed on the road, analyzes the image taken through the surveillance camera, and also recognizes the license plate of the vehicle in the image.

In addition, the traffic control server 30 may specify the preceding vehicle and the following vehicle of a specific vehicle through recognition of the license plate of the vehicle in the image. This information may be transmitted to the vehicle speed correction device 20 .

In addition, since the traffic control server 30 stores the location of the surveillance camera installed on the road, it is possible to know the location of a specific vehicle through license plate recognition.

Also, the traffic control server 30 may transmit a photographed image of a specific vehicle to the vehicle speed compensating device 20 in real time. In this case, the quality of the captured image is preferably such that the speed of the vehicle can be calculated based on the amount of movement of the vehicle in the image. For example, HD (High Definition) or Full HD is preferable.

2 is an exemplary view of a road environment for explaining the function of the vehicle speed compensating device according to the present invention.

As shown in FIG. 2 , a plurality of monitoring cameras 100 are installed on the road on which the vehicle travels, and the images captured by each monitoring camera 100 are transmitted through the middleware server 200 through the traffic control server 30 ) is transferred to

The surveillance camera 100 is a device located on a road and photographing a vehicle traveling on the road. It includes a memory unit for storing image data, and a transmitter unit for transmitting the image data to a middleware server.

The encoder unit encodes the image data photographed by the camera unit into a Moving Picture Experts Group (MPEG) or Joint Photographic Experts Group (JPEG) standard. For example, if the image data captured by the camera unit is moving image data, it is encoded in the MPEG standard, and in the case of still image data, it is encoded in the JPEG standard.

The middleware server is located on the shoulder of the road within 100 m to 1000 m with the surveillance camera 100 , and transmits an image of the vehicle photographed by the surveillance camera 100 to the traffic control server 30 .

In addition, the middleware server extracts the first traffic information of a specific part of the road from the image of the vehicle photographed by the surveillance camera 100, and then transmits the image of the surveillance camera and the first traffic information through the wireless Internet network to a remote traffic control server. It may also be transmitted to (30).

The middleware server may include a surveillance camera (CCTV) control unit, a first data communication module, a first traffic information database, and a server control unit.

The surveillance camera (CCTV) control unit controls the overall operation of the surveillance camera (CCTV), which encodes the image data captured by the camera unit when an image data request signal is received from the server control unit to the first traffic information database. send to

The first data communication module performs wireless data communication with the traffic control server 30 through a wireless Internet network.

The first traffic information database stores the image data of the vehicle photographed by the surveillance camera.

The server control unit transmits the image data of the vehicle photographed by the surveillance camera to the traffic control server 30 in real time.

In addition, the server control unit extracts the first traffic information of a specific part of the road from the image of the vehicle measured by the surveillance camera, and then transmits the image of the surveillance camera and the first traffic information through the wireless Internet network to the remote traffic control server 30 It can also serve to transmit

In addition, the server control unit may include a first traffic information extracting unit for extracting the first traffic amount information of a specific part of the road from the image of the vehicle captured by the surveillance camera. Here, the first traffic information extraction unit extracts the traffic information only in "congested mode" or "smooth mode" based on the speed of the vehicle passing through the specific road and the image of the vehicle. That is, when the speed limit on the highway is 100Km/h, the speed of the vehicle drops to 50Km/h or less, and when the vehicle is crowded on the video screen, the "congestion mode" is set.

Conversely, when the speed limit on the highway is 100Km/h, the vehicle speed is 80~100Km/h at a normal speed, and when the vehicle passes slowly on the video screen, it is set to "smooth mode".

In addition, the server control unit controls to transmit an image of a specific surveillance camera (CCTV) and first traffic information to the traffic control server 30 through the data communication module in response to the traffic information request from the traffic control server 30 .

The traffic control server 30 receives the video of the surveillance camera and the first traffic information from the middleware server, and receives the destination of the vehicle, the location of the vehicle, and the speed information of the vehicle from the vehicle's navigation, and receives the first traffic amount of the middleware server. Using the information and information received from the navigation system, the second traffic volume information is calculated by calculating the optimal route from the current location of the vehicle to the destination to avoid traffic congestion, and the video from the surveillance camera, the first traffic volume information, and the second traffic volume information are stored in the vehicle. It serves to transmit to the navigation and portable communication module of

The traffic control server 30 may include a data receiving unit, a second data communication module, a first traffic volume calculation control unit, a traffic volume second calculation control unit, an optimal route guidance algorithm, and a data transmission unit.

The data receiving unit receives the video of the surveillance camera from the middleware server and the first traffic information

and receives the vehicle's destination, vehicle location, and speed from the vehicle's navigation system.

The second data communication module performs data communication with the middleware server through a wireless Internet network or data communication with vehicle navigation.

When measuring the traffic volume by receiving the optimal road traffic command signal from the navigation device mounted on the vehicle, the traffic volume first calculation control unit calculates the traffic volume using vehicle speed information received from a plurality of vehicles in the same location, and then calculates the optimal route. It serves as an input to the guide algorithm.

When the traffic volume is measured by receiving the optimal road traffic command signal from the navigation device mounted on the vehicle, the traffic volume second calculation control unit calculates the traffic volume by receiving vehicle speed information that changes over time for one vehicle in the same location. , plays a role in inputting the optimal route guidance algorithm.

The data transmitter serves to transmit the surveillance camera image, the first traffic information, and the second traffic information on the optimal route to the navigation and portable communication module of the vehicle through the data communication unit.

In addition, when it is determined that traffic congestion will be induced when there are multiple vehicles that want to go to the same destination and the same route is presented, the traffic control server 30 presents a different route for each vehicle to provide traffic by the vehicle of the same destination. Prevent congestion in advance.

In addition, the traffic control server 30 has a function of converting the image of the surveillance camera into a format that can be read by navigation.

In addition, the traffic control server 30 has a function of scaling or clipping the image of the surveillance camera as a PND form factor.

In addition, the traffic control server 30 has a function of compressing the video of the surveillance camera to a minimum detail level visible on the navigation screen.

In addition, the traffic control server 30 has a function of encoding the resulting video using an A/V encoding standard such as MPEG-4 (Audio/Visual encoding standard) to calculate highly compressed video data.

3 is a configuration diagram of an apparatus for compensating a vehicle speed according to an embodiment of the present invention.

As shown in FIG. 3 , the vehicle speed correction apparatus according to the present invention includes a vehicle communication unit 21 , a server communication unit 22 , and a control unit 23 .

Looking at each of the above components, first, the vehicle communication unit 21 provides a communication interface with the vehicle terminal 10 , and the speed of the vehicle from the vehicle terminal 10 and current location information obtained through a navigation system mounted on the vehicle. (GPS information) can be periodically received. In this case, the period is preferably 1 second, for example.

Also, the vehicle communication unit 21 may periodically receive the vehicle speed and current location information (GPS information) obtained through the driver's smartphone from the vehicle terminal 10 . In this case, the smartphone GPS information may be GPS information compensated based on base station information of a wireless network.

In addition, the vehicle communication unit 21 is the vehicle speed from the vehicle terminal 10, the current location information (GPS information) obtained through the navigation mounted on the vehicle, the current location information obtained through the driver's smartphone (GPS information) may be received periodically. In this case, the smartphone GPS information may be GPS information compensated based on base station information of a wireless network.

Also, the vehicle communication unit 21 may periodically receive the speed of the preceding vehicle from the vehicle terminal 10 respectively mounted on a plurality of vehicles traveling on the road. In this case, identification information (vehicle model, vehicle number, etc.) of the vehicle on which the vehicle terminal 10 that has transmitted the speed is also received together with the speed.

Next, the server communication unit 22 receives the image of the vehicle from the traffic control server 30 in real time. In this case, the image may be an image of all vehicles subscribed to the service provided by the correction device of the present invention, or may be an image of a specific vehicle subscribed to the service provided by the correction device of the present invention. Here, when the server communication unit 22 receives an image of a specific vehicle, it corresponds to a case where the control unit 23 requests an image of a specific vehicle (vehicle number).

Next, the control unit 23 performs overall control so that each of the components can perform their functions normally.

In particular, the control unit 23 calculates the vehicle speed (reference speed) based on the received navigation GPS information along with the vehicle speed to determine whether there is an error in the vehicle speed received by the vehicle communication unit 21 . do.

Hereinafter, a process in which the controller 23 calculates a vehicle speed based on GPS information will be described with reference to FIG. 4 .

4 is an exemplary view for explaining a process in which the vehicle speed compensating apparatus according to the present invention calculates the vehicle speed.

In FIG. 4 , '410' denotes a point at which the vehicle speed compensating device 20 first received speed and navigation GPS information from the vehicle terminal 10, and '420' denotes the speed and the Indicates the point at which navigation information was received.

The control unit 23 detects the distance L1 between the point '410' and the point '420' based on the electronic map data, and the time the vehicle travels the distance L1 is 1 second. Multiply by 3600 seconds to calculate the vehicle's speed.

Thereafter, the controller 23 detects an error in the first speed by comparing the vehicle speed (hereinafter, first speed) received from the vehicle terminal 10 with the calculated speed (hereinafter, second speed) of the vehicle. . In this case, the first speed may be the speed of the vehicle received at point '410', may be the speed of the vehicle received at point '420', and may be the speed of the vehicle received at point '410' and at point '420'. It may be an average of the received vehicle speeds.

Here, the control unit 23 sets an effective range and determines that the first speed is normal if the difference between the first speed and the second speed is within the effective range, and if it is out of the effective range, an error occurs in the first speed can judge

Meanwhile, according to the present invention, the error determination process is performed again in consideration of errors in navigation GPS information.

That is, the control unit 23 calculates the vehicle speed (hereinafter referred to as the third speed) using the smartphone GPS information in the same manner as the method of calculating the second speed using the navigation GPS information, and then calculates the first speed and the third speed. If the difference between the speeds is within the effective range, it may be determined that the first speed is normal, and if it is out of the effective range, it may be determined that an error has occurred in the first speed.

By performing the error determination process twice in this way, it is possible to more accurately determine the error of the first speed.

Then, when an error occurs in the first speed, the control unit 23 generates correction information (correction formula) according to the relationship between the first speed and the third speed and transmits it to the vehicle terminal 10 through the vehicle communication unit 21 . . Then, the vehicle terminal 10 corrects the error of the speedometer by applying the received correction equation.

On the other hand, the control unit 23 receives from the vehicle terminal 10 mounted on each of a plurality of vehicles traveling on the road through the vehicle communication unit 21 of the preceding vehicle (vehicle running in front of the own vehicle in the same lane) The first speed may be corrected based on the speed and identification information (vehicle number) of the following vehicle of the target vehicle received from the traffic control server 30 through the server communication unit 22 . At this time, the vehicle communication unit 21 receives the vehicle speed (hereinafter, first speed) of the vehicle from the plurality of vehicle terminals 10, first location information obtained from the navigation of the vehicle, and the second vehicle driver obtained from the smartphone of the vehicle driver. 2 Periodically receive the location information, the speed of the preceding vehicle, and the identification information of the vehicle.

That is, the controller 23 receives the speed of the preceding vehicle from the vehicle terminals 10 respectively mounted on a plurality of vehicles traveling on the road. At this time, identification information on the following vehicle of the target vehicle received through the server communication unit 22 in order to specify which speed of the preceding vehicle is the speed of the target vehicle among the speeds of the preceding vehicle received from the plurality of vehicle terminals 10 . use the That is, the control unit 23 may specify the speed of which preceding vehicle is the speed of the target vehicle based on identification information on the following vehicle of the target vehicle (the vehicle transmitting the speed of the preceding vehicle).

For example, if the target vehicle is A and the following vehicle of the target vehicle is B, then B transmits the speed of the preceding vehicle. So, in order to know the speed of A, we need to know B. Since the identification information of B is received by the server communication unit 22, B can be specified through this.

When the speed of the target vehicle is specified in this way, the control unit 23 generates correction information (correction formula) according to the relationship between the first speed and the speed of the target vehicle and transmits it to the vehicle terminal 10 through the vehicle communication unit 21 . .

Meanwhile, the control unit 23 may correct the first speed based on an image (video) of the vehicle received in real time from the traffic control server 30 through the server communication unit 22 . That is, the controller 23 detects the vehicle in the image of the vehicle and calculates the speed of the vehicle (hereinafter, the fourth speed) based on the moving distance per time of the vehicle in the image.

Thereafter, the control unit 23 generates correction information (correction formula) according to the relationship between the first speed and the fourth speed, and transmits it to the vehicle terminal 10 through the vehicle communication unit 21 .

5 is a flowchart illustrating a vehicle speed correction method according to an embodiment of the present invention.

First, the vehicle communication unit 21 obtains the speed of the corresponding vehicle from the plurality of vehicle terminals (hereinafter, the first speed), the first location information obtained from the navigation of the vehicle, and the second location information obtained from the smartphone of the driver of the vehicle , the speed of the preceding vehicle and identification information of the corresponding vehicle are periodically received ( 501 ).

Then, the server communication unit 22 receives information on the following vehicle of the target vehicle and an image of the target vehicle ( 502 ).

Thereafter, the control unit 23 calculates a second speed using the periodically received first location information of the target vehicle based on the electronic map data, and uses the periodically received second location information of the target vehicle to obtain a second speed. 3 Calculate the velocity (503).

Then, the control unit 23 calculates a speed (hereinafter, referred to as a fourth speed) of the vehicle based on the image of the target vehicle ( 504 ).

Then, the control unit 23 specifies whether the speed of the target vehicle (hereinafter referred to as the fifth speed) among the speeds of the preceding vehicle is based on the information on the following vehicle of the target vehicle ( 505 ).

Thereafter, the control unit 23 sequentially compares the first speed with the second speed and the third speed to determine an error in the first speed of the target vehicle ( 506 ).

Thereafter, the control unit 23 corrects the first speed at which the error occurs based on any one of the third speed, the fourth speed, and the fifth speed ( S507 ).

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains.

Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to illustrate, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

21: vehicle communication department
22: server communication unit
23: control unit

Claims (19)

delete delete delete delete delete a vehicle communication unit configured to periodically receive the vehicle speed (hereinafter, first speed), first location information obtained from the navigation of the vehicle, and second location information obtained from the driver's smartphone;
a server communication unit for receiving the image of the vehicle in real time; and
A second speed is calculated using the periodically received first location information based on the electronic map data, a third speed is calculated using the periodically received second location information, and based on the image of the vehicle calculating the speed of the vehicle (hereinafter, the fourth speed), sequentially comparing the first speed with the second speed and the third speed to determine an error of the first speed, and determining the first speed at which the error occurred A control unit that corrects based on the fourth speed
A vehicle speed correction device comprising a. 7. The method of claim 6,
The control unit is
After generating correction information according to the relationship between the first speed and the fourth speed, the speed correction device for the vehicle is transmitted to the vehicle terminal through the vehicle communication unit. 7. The method of claim 6,
The control unit is
When the difference between the first speed and the second speed is out of an effective range, it is first determined that an error has occurred in the first speed. 9. The method of claim 8,
The control unit is
After it is first determined that an error has occurred in the first speed, if the difference between the first speed and the third speed is out of an effective range, it is finally determined that an error has occurred in the first speed. correction device. 7. The method of claim 6,
The second location information,
The vehicle speed correction device, characterized in that the GPS information compensated based on the base station information. The speed of the corresponding vehicle from a plurality of vehicle terminals (hereinafter, the first speed), the first location information obtained from the navigation of the vehicle, the second location information obtained from the smartphone of the driver of the vehicle, the speed of the preceding vehicle, the corresponding vehicle a vehicle communication unit for periodically receiving identification information of;
a server communication unit for receiving information about a vehicle following the target vehicle; and
Based on the electronic map data, a second speed is calculated using the periodically received first location information, and a third speed is calculated using the periodically received second location information, and Specifies which speed of the preceding vehicle is the speed of the target vehicle based on the information on A control unit that corrects the first speed based on the speed of the target vehicle
A vehicle speed correction device comprising a. 12. The method of claim 11,
The control unit is
The device for speed compensating for a vehicle, characterized in that after generating correction information according to the relationship between the first speed and the speed of the target vehicle, it is transmitted to the vehicle terminal through the vehicle communication unit. 12. The method of claim 11,
The control unit is
When the difference between the first speed and the second speed is out of an effective range, it is first determined that an error has occurred in the first speed. 14. The method of claim 13,
The control unit is
After it is first determined that an error has occurred in the first speed, if the difference between the first speed and the third speed is out of an effective range, it is finally determined that an error has occurred in the first speed. correction device. 12. The method of claim 11,
The second location information,
The vehicle speed correction device, characterized in that the GPS information compensated based on the base station information. The speed of the corresponding vehicle (hereinafter, the first speed) from the plurality of vehicle terminals, the first location information obtained from the navigation of the vehicle, the second location information obtained from the smartphone of the driver of the vehicle, the speed of the preceding vehicle, the corresponding vehicle periodically receiving identification information of
Receiving information about a vehicle following the target vehicle and an image of the target vehicle;
calculating a second speed using the periodically received first location information of the target vehicle based on the electronic map data and calculating a third speed using the periodically received second location information of the target vehicle;
calculating a speed (hereinafter, a fourth speed) of the vehicle based on the image of the target vehicle;
specifying whether the speed of the target vehicle (hereinafter referred to as a fifth speed) from among the speeds of the preceding vehicle based on information on the following vehicle of the target vehicle;
determining an error in the first speed of the target vehicle by sequentially comparing the first speed with the second speed and the third speed; and
Correcting the first speed at which an error has occurred based on any one of the third speed, the fourth speed, and the fifth speed
A vehicle speed correction method comprising a. 17. The method of claim 16,
The correction step is
generating correction information according to a relationship between any one of the third speed, the fourth speed, and the fifth speed and the first speed; and
Transmitting the correction information to the vehicle terminal
A vehicle speed correction method comprising a. 17. The method of claim 16,
The step of determining the error is:
first determining that an error has occurred in the first speed when the difference between the first speed and the second speed is out of an effective range; and
Final determining that an error has occurred in the first speed when the difference between the first speed and the third speed is out of an effective range
A vehicle speed correction method comprising a. 17. The method of claim 16,
The second location information is GPS information compensated based on base station information.

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