KR100824066B1 - Communication apparatus between vehicles and remote control method of vehicles using the same - Google Patents

Abstract

A vehicle communication device and a remote control method of vehicles using the same are provided to prevent a collision of vehicles by permitting vehicles to communicate information including traffic information. A data processor(410) collects driving data including a vehicle speed, a handle signal, an accelerator signal, a tire signal, a brake signal, and a GPS(Global Positioning System) signal, and delivers a control signal from other vehicle to activate the brake and the emergency lamp in an emergency. A modulator circuit modulates the driving data which is received from the data processor. An optical transmitter turns on/off an LED(Light Emitting Diode) lamp(104) based on the modulated signal. An optical receiver(120) receives the optical signal which is delivered from other vehicle according to a blinking state of the LED lamp, and demodulates the optical signal.

Description

Communication apparatus between vehicles and remote control method of the vehicle using the same {Communication apparatus between vehicles and remote control method of vehicles using the same}

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view schematically showing the configuration of an LED lamp, an optical transmitter and receiver, and a modulator for use in a communication device between vehicles of the present invention;

2 is a graph showing data of measuring modulation characteristics of an automotive LED lamp;

3 is a diagram for illustrating a configuration of a modulation circuit for driving an LED;

4 is a diagram showing a schematic configuration of a communication device between vehicles according to an embodiment of the present invention; And

5 is a flowchart illustrating an embodiment of a remote control method of a vehicle using a communication device between vehicles of the present invention.

Explanation of symbols on the main parts of the drawings

102: LED drive circuit

104: LED

106: visible light signal

108: lens

110: photodiode

112: amplifier

114: demodulation device

120: optical receiving device

400: vehicle operation data

410: data processing device

The present invention relates to a communication device between vehicles and a method for remotely controlling a vehicle using the same, and more particularly, to an apparatus for wirelessly performing optical communication between vehicles using an LED lamp and a method for remotely controlling a vehicle using the same.

There has always been a need to communicate between vehicles while driving. U.S. Patent No. 4,996,719 discloses an inter-vehicle optical communication device capable of ensuring confidentiality between a plurality of vehicles moving from one place to another. This apparatus is characterized in that optical communication between vehicles is performed by using a LED as a light emitting element, providing a light receiving element near the light emitting element, and connecting a transmitter to a light emitting element and a receiver to a light receiving element, respectively. However, the main point of this patent is to maintain the confidentiality of the communication, so that only one vehicle transmits an optical pulse of a carrier frequency modulated by a voice and receives and amplifies and demodulates it in another vehicle, thereby reproducing the voice. No technology has been disclosed that automatically detects driving safety information of a vehicle in another vehicle to be communicated with and controls driving of another vehicle based on the same.

On the other hand, when the leading vehicle and the rear end vehicle run in a line and head to a certain destination, the rear end vehicle often does not know the way to the destination or is often a beginner in driving. Accordingly, there is a need for a technology for obtaining safety information of a rear vehicle located immediately behind a leading vehicle, transmitting and receiving information on driving, and automatically controlling the rear vehicle in an emergency to ensure safety.

When exchanging information about safety of vehicles with each other by such communication between vehicles, if RF (Radio Frequency) communication technology or infrared communication technology is applied, the frequency used for communication should be separately authorized or harmful to human body may occur. It is difficult because of the danger, but if the communication in the visible light corresponds to green technology (Green technology), there is no need to attach a separate infrared transmitter. In addition, if the LED is used as a light emitting device used for transmission, if the headlight or taillight of the vehicle can be replaced with the LED, it is not necessary to install a separate LED in the vehicle for transmission, so it is applied without significantly increasing the cost of the device. It is possible.

The present invention for solving the above problems is to provide a communication device between vehicles that can be implemented relatively inexpensively, and to provide a method for performing a remote control between the mutually contracted vehicle using the technical problem.

The inter-vehicle communication device of the present invention for solving the above technical problem of the present invention:

With LED lamp;

Collects vehicle operation data, including vehicle speed, steering wheel, accelerator pedal, tires, brakes and GPS, and transmits control signals from the linked vehicle to activate the brakes and emergency lights of the vehicle in case of emergency A data processing apparatus;

A modulation circuit for modulating vehicle driving data obtained from the data processing apparatus;

An optical transmitter for blinking the LED lamp based on the modulated signal;

An optical receiving device for receiving and demodulating an optical signal transmitted from the companion vehicle through the blinking of the LED lamp;

Characterized in having a.

Here, it is preferable that the modulation circuit uses a transistor connected in parallel with the LED lamp when combining DC and AC signals.

The remote control method of the vehicle of the present invention for solving the technical problem of the present invention as described above using the inter-vehicle communication device,

Collecting vehicle driving data of the vehicle by the data processing apparatus and continuously transmitting the vehicle driving data to the companion vehicle through the optical transmitter and the LED lamp;

Determining an emergency situation by analyzing vehicle driving data transmitted by the companion vehicle;

When an emergency occurs in the own vehicle, receiving a control signal transmitted from the linked vehicle and flashing an emergency light while operating a brake of the own vehicle;

Characterized in having a.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. This embodiment is not intended to limit the scope of the invention, but is presented by way of example only.

1 is a view schematically showing the configuration of an LED lamp, an optical transmitter and receiver, and a demodulator used in a communication device between vehicles of the present invention. Referring to FIG. 1, vehicle driving data obtained from a data processing apparatus (not shown), which will be described later, is digitized and modulated to blink an LED 104 by an LED driving circuit 102 to display a visible light signal including information in free space ( 106). The visible light signal 106 is collected by the lens 108 and converted into an electrical signal by the photodiode 110. The converted electrical signal is amplified by the amplifier 112, and then enters the demodulator 114. Here, the LED used in the inter-vehicle communication device of the present invention uses a high brightness LED and may be arranged in an array form. The LED 104 flashes at an invisible speed to transmit data as an optical signal, and the transmitted optical signal is transmitted to the optical receiver 120 including the lens 108, the photodiode 110, and the amplifier 112. Will be received.

2 is a graph showing data of measuring modulation characteristics of an automotive LED lamp. Referring to Figure 2, it represents a 3dB bandwidth, it can be seen that the transmission rate of about 12Mb / s is guaranteed. Therefore, it can be seen that the visible light communication between the vehicles can be performed through the modulation of the automotive LED lamp.

3 is a diagram for illustrating a configuration of a modulation circuit for driving an LED. More specifically, FIG. 3A illustrates the use of a bias tee when synthesizing the DC and AC signals, and FIG. 3B illustrates the use of a transistor when the DC and AC signals are synthesized. In order to effectively load a modulation signal on an LED lamp, when using an LED array instead of a single LED, the LED array should be combined well in series and in parallel so that the amount of current is not large, and also a full swing on the LED. Using a transistor as shown in (b) of FIG. 3 rather than a digital current is advantageous for a high modulation frequency. It may be simply as shown in Fig. 3 (a), but it is not preferable because the DC voltage may affect the AC signal source when the bias-tee device malfunctions. Therefore, in the embodiment of the present invention, the modulation circuit is configured in the same manner as in FIG.

4 is a view showing a schematic configuration of a communication device between vehicles according to an embodiment of the present invention. Referring to FIG. 4, vehicle driving data 400 such as a steering wheel, a tire pressure, an accelerator pedal, a vehicle speed, a brake, and a GPS of a vehicle is collected by the data processing device 410. The collected vehicle driving data 40 is digitized and modulated and is loaded on the visible light signal by blinking the LED 104 by the LED driving circuit 102. The visible light signal is received through the optical receiver 120 of another vehicle and analyzed by the data processing apparatus 410 of the other vehicle. According to this data exchange method, it is also possible to communicate or exchange information with each other through LCD screens or voice messages between vehicles, but since this is already implemented in a communication method other than visible light communication, a detailed description thereof will be omitted. On the other hand, when it is determined that the emergency situation by analyzing the vehicle operation data transmitted from the other vehicle, vehicle drive devices for providing the vehicle operation data 400 to the other vehicle side in the data processing device 410 of his vehicle, for example Signals for remote control of steering wheels, brakes, etc. are sent to activate the brakes and emergency lights of the vehicle. In order to make this operation, there is a preliminary agreement for the approval of the remote control between the vehicles to which communication is performed, and of course, these vehicles must be run in series on the road. These arrangements are expected to be applicable primarily when family members share a car and drive and either of them is a complete novice.

5 is a flowchart illustrating an embodiment of a method for remotely controlling a vehicle using an inter-vehicle communication device according to an embodiment of the present invention, in which an automatic defense process of a next vehicle and a remote control of another vehicle are simultaneously processed in a next vehicle that has caught an emergency situation It shows the procedure to do.

In FIG. 5 (a), the preceding vehicle is indicated as B and the trailing vehicle as A, and each of the vehicle A and the vehicle B is provided with a communication device between the vehicles of the present invention, and remote control of the vehicle is performed using the same.

As shown in (b) of FIG. 5, vehicle B collects its own vehicle driving data (handle, tire pressure, brake pressure, etc.) by the data processing apparatus and transmits the data to the vehicle A through the optical transmitter and LED lamp. The vehicle A continuously receives and monitors the data while continuously receiving the data (step S10), and analyzes the driving data of the vehicle B in the vehicle A to determine whether it is an emergency situation (step S20). The emergency situation is determined by whether the tire pressure, steering wheel angle, and vehicle speed change suddenly. As a result of the emergency determination, in case of an emergency, priority is given to the control of vehicle A, which is a subsequent vehicle, and the emergency light is turned on at the same time (step S30), and the remote control signal is transmitted to vehicle B by B. The vehicle brakes and emergency lights are also activated (step S40). At this time, since vehicle A and vehicle B are running in succession, in order to prevent collision between these vehicles, it is determined whether the brake pressure of vehicle B in vehicle A is maximum (step S50), and if not, the vehicle A and vehicle B It is determined whether the distance between them is small (step S60), and if the distance is small, there is a risk of collision, thereby further increasing the brake pressure of the vehicle A (step S80). If the distance is not small as a result of the determination in step S60, the brake pressure of the vehicle B is further increased (step S100). In addition, in vehicle A, it is determined whether the brake pressure of vehicle B is the maximum (step S50). If this is the maximum, it is determined whether the distance between vehicle A and the vehicle B is small (step S70). It will reduce the brake pressure of the vehicle B (step S90). After the above steps, when both the vehicle A and the vehicle B finally reach 0, the remote control ends (step S110). In the method of this embodiment, it is assumed that the vehicle B, which is a preceding vehicle, transfers the control right to the vehicle A in an emergency situation. Such interlocking control is much more efficient than each vehicle controlling its own vehicle, thus preventing accidents.

According to the present invention as described above, by adding a communication function capable of data transmission to the LED lamps for cars enables communication between vehicles, and prevents collisions between vehicles, or exchange traffic information or other information between vehicles, etc. Can be. Recently, mandatory daylighting of car headlights is under debate. According to the results of research showing that there is a 40% anti-collision effect at the time of lighting, the possibility that the LED lamp of the car will be always on is increased. In addition, a vehicle having a communication function in addition to a lighting function may have a higher value added, and may have an important function of avoiding collision between vehicles by using the same.

Claims (3)

With LED lamp; Collects vehicle operation data, including vehicle speed, steering wheel, accelerator pedal, tires, brakes and GPS, and transmits control signals from the linked vehicle to activate the brakes and emergency lights of the vehicle in case of emergency A data processing apparatus; A modulation circuit for modulating vehicle driving data obtained from the data processing apparatus; An optical transmitter for blinking the LED lamp based on the modulated signal; An optical receiving device for receiving and demodulating an optical signal transmitted from the companion vehicle through the blinking of the LED lamp; Communication device between the vehicle having a. The inter-vehicle communication device according to claim 1, wherein the modulation circuit is a circuit using a transistor connected in parallel with the LED lamp when combining DC and AC signals. In the remote control method of the vehicle using the vehicle-to-vehicle communication apparatus of claim 1, Collecting vehicle driving data of the vehicle by the data processing apparatus and continuously transmitting the vehicle driving data to the companion vehicle through the optical transmitter and the LED lamp; Determining an emergency situation by analyzing vehicle driving data transmitted by the companion vehicle; When an emergency occurs in the own vehicle, receiving a control signal transmitted from the linked vehicle and flashing an emergency light while operating a brake of the own vehicle; Remote control method of a vehicle using a communication device between the vehicle characterized in that it comprises a.

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