KR20010001851A - Device for preventing robbery of car audio - Google Patents

Abstract

PURPOSE: An antitheft device of a car audio is provided to use the car audio even if a user forgets a password and to decrease a theft ratio of the car audio. CONSTITUTION: A microcomputer(30) receives a control signal for displaying a travel distance and a fuel level from a signal input terminal of travel distance and fuel level displayers(10,20). The microcomputer continuously accumulates the travel distance and fuel level data. The travel distance and fuel level recorded in the travel distance and fuel level displays are compared with the accumulated data. When a result of the comparison is different, the microcomputer blocks the process of a drive control program. Then, the drive of the car audio is blocked.

Description

Car audio theft prevention device {DEVICE FOR PREVENTING ROBBERY OF CAR AUDIO}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a car audio anti-theft device, and in particular, after storing information about the mileage and fuel level of a vehicle equipped with an initial car audio, the stored information and the information of the car audio mounted vehicle may not match. The present invention relates to a car audio anti-theft device which prevents theft of the audio by stopping the use of the audio.

In general, high-end vehicles are equipped with a car audio anti-theft system. Specifically, a password can be entered through the key control unit of the car audio itself, or the passenger can enter a password that matches the above while the password is stored in advance in the manufacturing process. The method of enabling audio driving has been mainly used.

However, if the user forgets the password, the audio could not be driven, and if the car audio is lost, the audio is embedded in the car audio itself so that it can be decrypted by an expert, thereby increasing the chance of providing theft of the audio. It was a chance.

Accordingly, the present invention has been made to solve the above problems, an object of the present invention is to provide a car audio anti-theft device that can use the car audio even if the user forgets the password, can lower the probability of theft of the car audio It is.

In order to achieve the above object, the car audio anti-theft device according to an embodiment of the present invention receives a control signal for displaying a mileage from a signal input terminal of a mileage display device of a vehicle and accumulates mileage information. And a memory unit for accumulating fuel level information by receiving a control signal for displaying the fuel level from a signal input terminal of the fuel level display device of the fuel level display device. And if the fuel level does not match, characterized in that consisting of a microcomputer to block the progress of the driving program of the car audio.

1 is a control block diagram of a car audio anti-theft device according to an embodiment of the present invention.

<Explanation of symbols for main parts of drawing>

10: mileage display device 20: fuel level display device

30: micom

Hereinafter, a car audio anti-theft device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a control block diagram of a car audio anti-theft device according to an embodiment of the present invention, the car audio anti-theft device according to an embodiment of the present invention is composed of a microcomputer 30 as shown in FIG. have.

The microcomputer 30 has a program for controlling the driving of the car audio, and two signal lines are exposed to be connected to the signal input terminal of the mileage display device 10 and the signal input terminal of the fuel level display device 20. . Specifically, the control of power interruption, tuning, and recording and reproducing operations are performed, and the audio can be driven only when the embedded program proceeds to the planned flow. In particular, the control signal for displaying the mileage is received from the signal input terminal of the mileage display device 10 of the vehicle and continuously accumulates the mileage information corresponding thereto, and the fuel level display device 20 of the vehicle is displayed. The memory unit receives a control signal for displaying the fuel level from the signal input stage and continuously accumulates corresponding fuel level information. In addition, the microcomputer 30 compares the driving distance information and fuel level information accumulated in the memory unit with the driving distance and fuel level of the car audio-equipped vehicle, and drives the car audio when the values do not coincide with each other. It blocks the progress of the program at the source.

The memory unit is an EPROM (ERASABLE PROGRAMMABLE READ ONLY MEMORY, hereinafter referred to as EPROM), and can accumulate programs by the user, and the memory contents are preserved even when the power is cut off. And the fuel level information continues to accumulate, and the information can be continuously stored even after the car audio is separated from the vehicle body.

The operation of the car audio anti-theft device according to an embodiment of the present invention having the configuration as described above will be described.

First, when the vehicle is shipped, the microcomputer 30 inside the car audio mounted on the vehicle is a control signal for displaying the driving distance and the fuel level from the signal input terminal of the driving distance display device 10 and the fuel level display device 20. The driving distance information and the fuel level information are continuously accumulated, and the driving distance and fuel level recorded in the driving distance display device 10 and the fuel level display device 20 of the vehicle are accumulated. In comparison with each other, the driving of the car audio may be blocked by blocking the progress of the driving control program for driving the car audio.

If the car audio is stolen from the vehicle and mounted on another vehicle, the microcomputer 30 compares the mileage information and fuel level information accumulated in the vehicle with the mileage information and fuel level display information of the vehicle. If they do not coincide with each other, they can block the driving of the car audio, thereby reducing the chance of preventing theft of the car audio, and the vehicle occupants do not enter the password. It is possible to prevent the car audio from being driven by the passengers forgetting the password.

As described above, according to the car audio anti-theft device according to the present invention, when the device is installed in the initial shipping vehicle, the mileage display and the fuel level display are displayed through the signal input terminals of the mileage display device and the fuel level display device of the vehicle. After receiving the control information and accumulating and storing the corresponding mileage information and fuel level information, the mileage and the mileage of the vehicle through the signal input of the mileage display device and fuel level display device of the car audio By comparing the fuel level information and the stored information, if the car information is different from each other, the probability of providing a car audio theft can be reduced by blocking the progress of the driving program of the car audio, and it is generated by forgetting the password because it is not a method of entering a password. There is an excellent effect that can be relieved of anxiety.

Claims (2)

Fuel level information is received by receiving a control signal for displaying the mileage from the signal input terminal of the mileage display device of the vehicle and accumulating mileage information while receiving a control signal for displaying the fuel level from the signal input terminal of the fuel level display device of the vehicle. And a memory unit for accumulating the memory unit. If the driving distance information and the fuel level information stored in the memory unit do not match the distance and fuel level of the car-mounted vehicle, the microcomputer stops the driving of the car audio. Car audio theft prevention device. The method of claim 1, And the memory unit is an EPROM.