KR20140147298A - Digital taco graph and method for data transformaing theirof - Google Patents

Abstract

The present invention relates to a digital running recorder and a data transfer method thereof.
A digital running recorder (DTG) according to the present invention is a digital running recorder (DTG) for transmitting driving record data of a vehicle to a management server outside the vehicle via a communication interface, comprising: a memory for storing driving record data of the vehicle; A management server for converting the driving record data of the vehicle stored in the memory into compression binary format data for transmission to the management server through wireless communication and then encoding the binary data in Base 64 format to generate transmission data And a processing unit.

Description

TECHNICAL FIELD [0001] The present invention relates to a digital driving recorder,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a vehicle driving recorder and a driving record data transmitting method, and more particularly, to a digital driving recorder and a data transmitting method thereof, which can reduce a load generated during transmission of driving record data and reduce a data storage space.

With the convergence of information and communication technologies in the automobile field, a variety of technologies have been developed and applied to remotely monitor and manage the driving information and accident record information of commercial vehicles.

Among them, Digital Taco Graph (DTG) is a device for recording the driving status of a vehicle. It is a device for recording the driving status of a car, and is used to display a recorded data on a watch, a speedometer, an odometer, a GPS receiver, And the output port that can be connected to the network.

The legally mandatory date for the installation of digital driving recorders for commercial vehicles has already been enforced by the end of 2012 for buses and corporate taxis, and private taxis and freight cars are short-lived by the end of 2013.

As a result, the development of digital driving recorders is accelerating, and its functions are evolving.

For example, Korean Patent Publication No. 10-2005-0107556 discloses a digital running recorder equipped with a burglar alarm to prevent theft of a parked vehicle.

However, in practical application, in a manager server that manages a large number of vehicles, transmission errors frequently occur when receiving data related to vehicle driving recordings from a digital running recorder mounted on each vehicle, .

In addition, according to the Enforcement Decree of the Traffic Safety Act, the record of the operation of the commercial vehicle must be stored for 6 months and then transferred to the government agency.

Therefore, there is a need for a method capable of efficiently transmitting data such as a driving record transmitted to the outside from the digital running recorder, and managing and storing the received data.

Korean Patent Publication No. 10-2005-0107556

SUMMARY OF THE INVENTION It is therefore a general object of the present invention to provide a digital driving recorder capable of substantially completing various problems caused by limitations and disadvantages of the prior art, And a method of transmitting the data.

It is a further object of the present invention to provide a digital running recorder and a data transfer method thereof capable of reducing the capacity of data transmitted from the digital running recorder to the outside to improve transmission errors and transmission delay problems, .

To this end, the digital running record apparatus according to an embodiment of the present invention is a digital running record apparatus (DTG) for transmitting running record data of a vehicle to a management server outside the vehicle via a communication interface, A memory for storing the data; A management server for converting the driving record data of the vehicle stored in the memory into compression binary format data for transmission to the management server through wireless communication and then encoding the binary data in Base 64 format to generate transmission data And a processing unit.

In the digital running record apparatus according to an embodiment of the present invention, the central processing unit may include a memory data processing step of reading the vehicle driving record data in the recorded order and generating data for DTG data processing; A DTG data processing step of dividing the memory data processed data into driver-specific or vehicle-specific data and then converting the data into data for transmission through wireless communication; A binary data processing step of converting the DTC data processed data into a compressed binary format; And performs a Base64 encoding process of encoding the binary data-processed data in Base64 format.

The communication interface may include at least one of a WIFI interface, a Zigbee interface, a Bluetooth interface, and a CDMA interface.

According to another aspect of the present invention, there is provided a data transmission method for a digital running recorder, including: (a) converting vehicle driving record data stored in a memory into binary data; And (b) encoding the binary data in Base64 format.

In the data transmission method of the digital running recorder according to the embodiment of the present invention, the data format after being encoded in the Base64 format by the process (b) includes a header, a data sequence, Recording data, a checksum, and a tail field.

In the data transfer method for a digital running recorder according to an embodiment of the present invention, the step (a) includes a step of reading data of vehicle driving record data stored in a memory in the recorded order and generating data for DTG data processing ; A DTG data processing step of dividing the memory data processed data into driver-specific or vehicle-specific data and then converting the data into data for transmission through wireless communication; And a binary data processing step of converting the DTC data processed data into a compressed binary format.

According to the digital running recorder and the data transfer method of the present invention, the running record data of the vehicle is not transmitted in a character form but is encoded into a base 64 and transmitted, thereby converting existing binary data into a character form and transmitting The data capacity can be reduced to one-third, thereby improving problems such as data transmission errors and transmission delays, and reducing data storage space.

1 is a block diagram schematically showing a configuration of a digital running recorder according to an embodiment of the present invention.
2 is a diagram schematically illustrating a data processing and transmission system using a digital running recorder according to an embodiment of the present invention.
FIG. 3 shows a data format applied to the digital running recorder according to the present invention, wherein (a) shows a data format after binary data processing, and (b) shows a data format after Base64 encoding.
FIG. 4 is a flowchart illustrating a series of processes for transmitting a driving record of a vehicle to a management server using a data transmission method of a digital running recorder according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the terms described below are defined in consideration of the functions of the present invention, and these may vary depending on the intention of the user, the operator, or the precedent. Therefore, the definition should be based on the contents throughout this specification.

1 is a block diagram schematically showing a configuration of a digital running recorder according to an embodiment of the present invention.

Referring to FIG. 1, the digital running recorder according to the present embodiment includes a central processing unit (CPU) 100 for overall control of the operation of each component constituting the digital running recorder, An interface unit 300 for communicating between the central processing unit 100 and the administrator server, an interface unit 300 for receiving a GPS signal from a GPS (Global Positioning System) satellite, And a memory 700 for recording driving information of the vehicle.

In particular, the central processing unit 100 reads out the driving record data stored in the memory 700 in the recorded order, and controls the operation of the wireless communication And converts the binary data into a standard base 64 (Base64) format to generate transmission data. When the binary data is encoded into the base 64, the amount of data can be reduced to 1/3 compared with the case where the binary data is converted into a character form and transmitted.

The input unit 200 includes a CAN input unit 210 that receives information on ECU (Electric Control Unit) data of a vehicle such as a driving distance, a speed, an RPM, a brake signal, and an acceleration through a CAN communication, A speed input unit 220 for inputting a speed pulse signal, a rotation speed input unit 230 for inputting a rotation speed of the engine (RPM pulse signal), a brake input unit 240 for inputting a brake operation state (brake signal) And an OBD-II input unit 250 that receives speed, RPM, and break information using an OBD (On Board Diagnosis) -II interface. OBD (On Board Diagnosis) -II is an international standard for vehicles that provides the user or mechanic with information on the vehicle problems or conditions collected through the vehicle diagnostic connector (OBD-II connector) provided in the vehicle. That is, when the overall state of the vehicle is sensed through sensors mounted on the respective parts of the vehicle, and the sensed information is inputted through the OBD-II input part of the vehicle, the user or the mechanic, based on this information, Information and the like can be monitored and analyzed.

The interface unit 300 is for transmitting vehicle driving information stored in the memory 700 to the administrator server through wireless communication under the control of the central processing unit 100 and includes a WIFI interface 310, a Zigbee ) Interface 320, a Bluetooth interface 330, and a CDMA interface 340. As shown in FIG. It should be understood that the communication interface described above is merely exemplary and may include other communication interfaces capable of transmitting vehicle driving information to a manager server through wireless communication.

The connection control unit 400 includes a DVR control unit 410 for transmitting DTG information to a DVR in cooperation with a DVR (Digital Video Recorder) for a vehicle, determining whether the DVR operates normally and resetting the DVR when a problem is detected, And a USB control unit 420 for storing data and acquiring DTG settings from the USB.

In recent years, more than one surveillance camera or microphone has been installed in a vehicle, mainly a commercial vehicle such as a taxi, a bus, or a truck, and a surveillance camera or a microphone monitors the front or inside of the vehicle and records and records the vehicle's driving information Vehicle DVR devices for storing them in a DVR device inside the vehicle have become popular. When the inside and outside of the vehicle are monitored and recorded (recorded), the image information at the time of getting on and off the passenger can be collected. In addition, in a higher performance car DVR apparatus, the video information is interlocked with the digital running recorder, and the video information is stored in the DVR unit for the vehicle along with the speed information and the position information so that the recorded video information can be viewed together with the speed and position information. It is used as a useful data for the cause identification.

The measuring unit 500 includes a temperature / humidity measuring unit 510 for measuring the temperature and humidity of the refrigerator / freezer compartment when the refrigerator is connected to a refrigerator or a freezer, and a fuel consumption measuring unit 520 for measuring the fuel consumption of the vehicle in real time do.

The GPS receiver 600 receives GPS signals from a plurality of GPS satellites and calculates a current position of the vehicle.

The memory 700 may include a FRAM memory and a NAND memory for storing driving-related information of the vehicle at a predetermined time interval in real time. FRAM memory stores data in real time at 0.01 second interval, and NAND memory stores real time data at 1 second interval.

FIG. 2 is a diagram schematically illustrating a data processing and transmission method using a digital running recorder according to an embodiment of the present invention. Hereinafter, a process of transmitting a driving record of a vehicle from a central processing unit to an external management server will be described As follows.

2, the central processing unit 100 of the digital driving record device reads the vehicle driving data stored in the FRAM memory 710 and the NAND memory 720 of the memory 700 in the recorded order, The transmission data for wireless transmission is generated through the data processing 110S, the DTG data processing 120S, the binary data processing 130S and the Base64 encoding S140, and then transmitted through the interface unit 300 to the management server 800 ).

The memory data processing (S110) is a process of reading vehicle driving data stored in the FRAM memory 710 and the NAND memory 720 in the recorded order and generating data for DTG data processing.

The DTG data processing (S120) is a process of generating data by separating into driver-specific or vehicle-specific data, and converting the data into data to be stored in the USB or transmitted wirelessly.

The binary data processing (S130) is a process of converting DTG data into a compressed binary format for wireless transmission.

The Base64 encoding (S140) is a process of encoding binary data in a standard Base64 format to generate transmission data. Base64 encoding is an encoding method that converts 8-bit binary data (for example, an executable file or a ZIP file) into a series of strings consisting only of characters in the common ASCII region that are not affected by character codes. The amount of data can be reduced to one third or less.

FIG. 3 shows a data format (format) applied to the digital running recorder according to the present invention, wherein (a) shows a data format after binary data processing, and (b) shows a data format after Base64 encoding .

As shown in FIG. 3A, the data format after binary data processing includes a header, a vehicle number, a driver code, a mileage, a terminal serial number, a checksum, and a tail field. The checksum value is a value that is calculated according to the contents of the packet. It is a value that checks whether the data is correctly received or not by calculating a checksum of the data received by the data receiver and checking whether this value matches the transmitted checksum value.

The data format after encoding with Base64 is composed of a header, a data sequence, running record data encoded in Base64, a checksum, and a tail field, as shown in FIG. 3 (b). Base64 encoded driving record data can include information such as date and time, mileage, speed, RPM, break, GPS coordinates, acceleration record, vehicle status, vehicle fuel consumption, and so on.

FIG. 4 is a flowchart illustrating a series of processes for transmitting a driving record of a vehicle to a management server using a data transmission method of a digital running recorder according to an embodiment of the present invention.

Referring to FIG. 4, the digital driving recorder transmits a connection request signal to a management server through a Wi-Fi interface (S401), for example. At this time, the connection request signal may include a vehicle number that can identify the vehicle, a driver code, and a serial number (unique number) of the digital driving record device. At this time, the connection request signal may have a data format as shown in (a) of FIG.

Next, it is determined whether the connection is allowed from the administrator server (S402), and if the connection is permitted, the operation record data stored in the memory is transmitted to the manager server (S403). At this time, the transmitted driving record data is data converted so as to have a data format as shown in Fig. 3 (b).

If it is determined in step S402 that the access to the administrator server is not permitted, it is determined whether the connection wait time is exceeded (S404). If the wait time has not been exceeded, the connection wait is continued.

Next, it is checked whether or not the driving record is changed (S405). This procedure is for judging whether the driver of the vehicle equipped with the digital running recorder is to be replaced or the vehicle number is to be changed, in order to store the driving record data to be stored in a matching manner with the vehicle number and the driver code.

As a result of the determination in step S405, if the operation record is not changed, it is determined whether the transmission end or the reception confirmation time is exceeded (S406), and the operation record is continuously transmitted until the reception confirmation time is exceeded. If it is exceeded, the connection is terminated after receiving the configuration signal from the server (S407).

Embodiments of the present invention may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer readable medium. The computer readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware device may be configured to operate as one or more software modules for performing the operations of the present invention.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and similarities. Accordingly, the scope of the present invention should be construed as being limited to the embodiments described, and it is intended that the scope of the present invention encompasses not only the following claims, but also equivalents thereto.

100: central processing unit 200: input unit
300: interface unit 400: connection control unit
500: Measuring section 600: GPS receiving section
700: memory 800: management server

Claims (6)

A digital driving recorder (DTG) for transmitting vehicle driving record data to a management server outside the vehicle via a communication interface,
A memory for storing driving record data of the vehicle;
A management server for converting the driving record data of the vehicle stored in the memory into compression binary format data for transmission to the management server through wireless communication and then encoding the binary data in Base 64 format to generate transmission data And a processing unit for determining whether or not the digital recording medium has been recorded.
The apparatus of claim 1, wherein the central processing unit
A memory data processing step of reading the vehicle driving record data in the recorded order and generating data for DTG data processing;
A DTG data processing step of dividing the memory data processed data into driver-specific or vehicle-specific data and then converting the data into data for transmission through wireless communication;
A binary data processing step of converting the DTC data processed data into a compressed binary format;
And performs a Base64 encoding process of encoding the binary data-processed data in Base64 format.
2. The apparatus of claim 1, wherein the communication interface
A WIFI interface, a Zigbee interface, a Bluetooth interface, and a CDMA interface.
A data transfer method in a digital running recorder,
(a) converting vehicle driving record data stored in a memory into binary data; And
(b) encoding the binary data in a Base64 format.
5. The method of claim 4, wherein the data format after being encoded in Base64 format by the process (b)
A data sequence, Base64-encoded driving record data, a checksum, and a tail field.
5. The method of claim 4, wherein the step (a)
A memory data processing step of reading the vehicle driving record data stored in the memory in the recorded order and generating data for DTG data processing;
A DTG data processing step of dividing the memory data processed data into driver-specific or vehicle-specific data and then converting the data into data for transmission through wireless communication;
And a binary data processing step of converting the DTC data processed data into a compressed binary format.

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