KR100186645B1 - Anti-theft device using a car audio - Google Patents

Abstract

The present invention relates to a car anti-theft device using car audio, comprising a key input unit having an anti-theft function key for setting and releasing the anti-theft function, and receiving the anti-theft function setting signal from the key input unit, A microcomputer for overall control, a door switch for inputting a door open / close signal to the microcomputer, a key position sensor for inputting a start key on / off signal to the microcomputer, and a door opening signal from the door switch to the microcomputer If the start key on signal is not input for a period of time, it is composed of a speaker that outputs a beep sound according to the beep sound signal from the microcomputer.If the start key is not turned on within a certain time after the door of the car is opened, a warning sound is generated. The beep will only stop when the ignition key is on and the anti-theft function key is pressed. Can be easily cut the signal line connecting the car audio speaker for outputting a high not to improve the anti-theft effect.

Description

Anti-theft device for car using car audio

The present invention relates to a car antitheft device using car audio, and more particularly to a car antitheft device using car audio to prevent theft of the car by generating a warning sound when there is an intruder in the car.

In general, various means have been taken to prevent theft of automobiles. Among the various means, anti-theft devices installed in automobiles recently have been applied to the police when the shock sensor mounted on the vehicle detects vibrations or shocks above a certain intensity. Siren sounds etc loudly. Then, the attention of the people around the car is attracted to the car, thus preventing theft in such a way that the stealing car does not stay long around the car. In addition, such a vehicle anti-theft device detects vibration or shock over a certain intensity and generates a warning sound, thereby preventing theft of the car and protecting the car from damage.

However, the warning sound generating speaker provided in the above-mentioned general vehicle anti-theft device has a signal line connecting the warning sound generating speaker and the impact detecting device before the vehicle is stolen because the mounting position is one side of the lower part of the engine room of the vehicle. Since the vehicle is easily cut and then approached to the vehicle, the conventional vehicle anti-theft device had a problem that only the effect of preventing vehicle damage was obtained.

The present invention has been invented to solve the above problems, if the start key is not turned on within a certain time after the door of the car outputs a warning sound and the generated warning sound must be the start key is on and the anti-theft function key input Since the output is interrupted, double release operation must be performed, and car theft is prevented by using car audio, which improves the anti-theft effect because the signal line connecting the speaker that generates the warning sound can not be easily cut by using car audio installed in the car. The object is to provide a device.

In order to achieve the above object, the present invention provides a key input unit having an anti-theft function key for setting and releasing the anti-theft function, and a microcomputer that receives the anti-theft function setting signal from the key input unit and collectively controls the anti-theft function. A door switch for inputting a door open / close signal to the microcomputer, a key position sensor for inputting a start key on / off signal to the microcomputer, a door open signal to the microcomputer from the door switch, and a start key on for a predetermined time If there is no signal input, it is characterized by consisting of a speaker for outputting the beep according to the beep sound generation signal of the microcomputer.

1 is a block diagram of the present invention.

2 is a flowchart for explaining the operation of the present invention.

* Explanation of symbols for main parts of the drawings

1: key input 2: microcomputer

3: door switch 4: key position sensor

5: speaker 6: electronic volume

7: power amplifier 8: power supply

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

The configuration of the present invention is a key input unit 1 having an anti-theft function key for setting and releasing the anti-theft function as shown in FIG. 1, and the anti-theft function setting signal is inputted from the key input unit 1 to be stolen. A microcomputer 2 for overall control of the prevention function, a door switch 3 for inputting a door open / close signal to the microcomputer 2, and a key position sensor for inputting a start key on / off signal to the microcomputer 2; 4) and a speaker for outputting a beep sound according to the beep generation signal of the microcomputer 2 when a door opening signal is input from the door switch 3 to the microcomputer 2 and there is no start key on signal input for a predetermined time. It consists of (5).

Here, the door switch 3 outputs a low signal when the door is closed and a high signal when the door is opened, and the key position sensor 4 outputs a low signal when the position of the start key is off. Outputs a high signal.

Then, the electronic volume 6 which receives the beep sound generation signal of the microcomputer 2 and adjusts the volume level and outputs the low volume amplified beep sound of the electronic volume 6 to the speaker 5 A power amplifier 7 for outputting through the outside is provided.

In addition, a power supply unit 8 for supplying power to the electronic volume 6 and the power amplifier 7 according to the power supply control signal of the microcomputer 2 is provided.

The microcomputer 2 includes a timer (not shown) that counts time.

On the other hand, in the control method applied to the present invention configured as described above, as shown in FIG. 2, first, it proceeds to the start determination step (S1) to determine whether the start of the vehicle is turned off. Then, if it is determined that the start is not turned off in the start determination step (S1), the process is terminated. While performing the time counting step S2, the control proceeds to the anti-theft function setting determination step S3 to determine whether there is an anti-theft function key input. If it is determined that there is an anti-theft function key input in the anti-theft function setting determination step (S3), the process proceeds to the anti-theft function setting step (S4) to set an anti-theft flag. In step S5, the car audio is powered off.

Then, the process proceeds to the door open determination step S6 to determine whether the door is opened. If it is determined that the door is not opened in the door opening determination step (S6), it is determined that the door is opened by returning to the door opening determination step (S6), but if it is determined that the door is opened, the process proceeds to the door closing determination step (S7). It is determined whether the door is closed.

If it is determined that the door is not closed in the door closing determination step (S7), it is determined that the door is closed by returning to the door closing determination step (S7), but if it is determined that the door is closed, proceed to the anti-theft function start step (S8). To start the antitheft function. Then, the process proceeds to the backup mode step S9 to the backup mode, which is a low power consumption mode.

On the other hand, if it is determined that there is no anti-theft function key input in the anti-theft function setting determination step (S3), the process proceeds to a predetermined time elapsed determination step (S10) and the time at which the counting starts in the time counting step (S2) has elapsed. Judge whether or not.

If it is determined in step S10 that the predetermined time has not elapsed, the control returns to the anti-theft setting setting step S3 to determine whether there is an anti-theft function key input, but when it is determined that the predetermined time has elapsed, the power is turned off. In step S11, the car audio is powered off, and in the backup mode step S12, the process proceeds to the backup mode, which is a low power consumption mode, and ends.

After the backup mode step S9 is performed, the process proceeds to the door open determination step S13 to determine whether the door is opened. If it is determined that the door has not been opened in this door opening determination step (S13), it is returned to the door opening determination step (S13), and it is determined whether the door has been opened, but if it is determined that the door is opened, the process proceeds to the time counting step (S14). Start counting. Then, the process proceeds to the start determination step (S15) to determine whether the car is started.

If it is determined that the startup has not been started in the startup determination step S15, the process proceeds to the predetermined time elapsed determination step S16 to determine whether the time at which the counting starts in the time counting step S14 has reached a predetermined time.

If it is determined that the predetermined time has not elapsed in the predetermined time elapsed judging step S16, the process returns to the start judging step S15 to determine whether the vehicle has been started.

On the other hand, if it is determined that the predetermined time has elapsed in the predetermined time elapsed determination step (S16), the flow proceeds to the power supply step (S17) to apply power to the electronic volume and the power amplifier.

Then, the process proceeds to the warning sound generating step (S18) to generate a warning sound. In the warning sound generating step (S18), while generating a warning sound, the process proceeds to the start determination step (S19) to determine whether the car is started.

If it is determined that the vehicle is not started in the start determination step (S19), it is returned to the start determination step (S19), and it is determined whether the vehicle has been started. Proceed to S20) to determine whether there is an anti-theft release key input.

If it is determined that there is no anti-theft release key input in the anti-theft release step (S20), it returns to the warning sound generation step (S18) and continues to generate a warning sound, but stops generating an alarm when it is determined that there is an anti-theft release key input. The flow advances to step S21 to stop the warning sound. In operation S22, the power applied to the electronic volume and the power amplifier is cut off. After the power off step S22 is performed, the process proceeds to an antitheft release step S23 to clear the antitheft flag.

On the other hand, if it is determined that the start has been made in the start determination step (S15), the process immediately proceeds to the theft prevention function release step (S23), clears the antitheft flag, and ends.

That is, when a signal corresponding to the start key off position is input from the key position sensor 4 to the microcomputer 2, the microcomputer 2 determines that starting is turned off and outputs a control signal to the built-in timer to start the time counting. . Then, when the driver inputs the anti-theft function setting key through the key input unit 1, the microcomputer 2 sets the anti-theft flag and outputs a power off control signal to the power supply unit 8 to power off the car audio. When the door opening signal is input through the door switch 3 and the door closing signal is input, the driver is getting out of the vehicle, and thus the microcomputer 2 proceeds to the anti-theft mode to perform the anti-theft function. Then, the microcomputer 2 proceeds to the backup mode which is a low power consumption mode.

On the other hand, the microcomputer 2 outputs a power-off control signal to the power supply unit 8 if the anti-theft setting key is not input while the start-up is turned off and a predetermined time has elapsed. Proceed to mode. If the anti-theft setting key is not input, the anti-theft function is not performed.

When the door open signal is input through the door switch 3 while the anti-theft function is being performed, the microcomputer 2 outputs a control signal to the built-in timer to start the time counting. When the signal corresponding to the start key off position is input from the key position sensor 4, the microcomputer 2 determines whether the time counted by the timer has passed a predetermined time. The microcomputer 2 outputs a power application control signal to the power supply unit 8 when a predetermined time elapses without starting, and applies power to the electronic volume 6 and the power amplifier 7. The microcomputer 2 outputs a beep sound generation signal to the electronic volume 6. Then, the electronic volume 6 outputs the input beep signal by adjusting the volume, and the low frequency amplified beep sound in the power amplifier 7 is output to the outside through the speaker 5.

Here, the volume level adjusted in the electronic volume 6 is a volume level that can be heard from the outside of the vehicle even when the window of the vehicle is completely raised and the door is closed.

If a signal corresponding to the start key on position is input from the key position sensor 4 while a warning sound is output through the speaker 5, that is, a start is applied and the anti-theft release key input is input through the key input unit 1. If present, the microcomputer 2 stops outputting the beep sound generation signal. Then, a power cutoff control signal is outputted to the power supply unit 8 to cut off the power supplied to the electronic volume 6 and the power amplifier 7. Then, the anti-theft flag is cleared.

However, even if a signal corresponding to the starting key on position is input from the key position sensor 4 to the microcomputer 2, if there is no anti-theft release key input through the key input unit 1, the microcomputer 2 outputs a beep sound generation signal. Continue.

On the other hand, when the door open signal is input through the door switch 3 while the anti-theft function is being performed, the microcomputer 2 outputs a control signal to the built-in timer to start the time counting, but the time counted by the timer has passed a predetermined time. If a signal corresponding to the start key on position is input from the key position sensor 4 to the microcomputer 2, that is, if the start is applied, the anti-theft flag is cleared.

The present invention outputs a warning sound when the ignition key is not turned on within a predetermined time after the door of the car is opened as described above, and the generated warning sound is stopped only when the ignition key is turned on and the anti-theft function key is input. By using the car audio, the signal line connecting the speaker that generates the warning sound cannot be easily cut, thereby improving the anti-theft effect.

Claims (1)

A key input unit (1) having an anti-theft function key for setting and releasing the anti-theft function, a microcomputer (2) which receives the anti-theft function setting signal from the key input unit (1) and collectively controls the anti-theft function, A door switch 3 for inputting a door open / close signal to the microcomputer 2, a key position sensor 4 for inputting a start key on / off signal to the microcomputer 2, and the door switch 3 from the door switch 3 When the door opening signal is input to the microcomputer 2 and there is no start key on signal input for a predetermined time, the car audio is characterized in that the speaker 5 is configured to generate a beep sound according to the beep sound generating signal of the microcomputer 2. Automotive anti-theft device.