JP2002240639A - On-vehicle acoustic device and theft preventing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect a change of a vehicle, and output a warning sound signal in response to the detection. SOLUTION: This on-vehicle acoustic device is provided with an on-vehicle audio unit 13 having an audio signal supplying unit 24 for supplying an audio signal, a volume adjusting unit 25 for adjusting the volume of the audio signal and an audio signal output unit 27, and a sensor 21 for detecting a change of the vehicle and for supplying the detected signal to the on-vehicle audio unit 13 and a control unit t22 for controlling the operation of the on-vehicle audio unit 13 and the sensor 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle audio device having a sensor for detecting a change in a vehicle and a method for preventing theft, and more particularly, to an output of the on-vehicle audio device when the sensor detects a change in the vehicle. The present invention relates to an on-vehicle acoustic device that outputs a warning sound from a unit and a theft prevention method.

[0002]

2. Description of the Related Art A vehicle owner sometimes installs a vehicle antitheft device on a vehicle to prevent theft of the vehicle.

[0003] The vehicle antitheft device is used, for example, when a third party for vandalism or theft of a vehicle contacts the vehicle, opens the door of the vehicle, or applies an impact to the vehicle. By outputting a warning sound signal for warning, attention is paid to the surroundings to prevent the vehicle from being stolen.

As described in Japanese Patent Application Laid-Open No. 8-268182, there is a vehicle-mounted device in which a front operation panel of a vehicle-mounted audio device is replaced with a security panel, and the security panel prevents the vehicle from being stolen. The outline of the above publication is described below.

[0005] The on-vehicle device described in the above publication includes a normal front operation panel, a security unit, a control unit, and a power supply unit. The normal front operation panel includes an operation unit and a display unit. Further, the normal front operation panel can be freely removed. The security unit drives security means such as locking a vehicle door during a security operation and outputting a warning sound.

The security front operation panel includes an operation unit and a display unit, and can be mounted at a place where the normal front operation panel is removed. The on-vehicle device exchanges the normal front operation panel with the security front operation panel, and controls a security function for preventing a vehicle from being stolen.

The security front operation panel has a sensor for detecting theft of the vehicle. The sensor generates a detection signal when detecting theft of the vehicle,
The detection signal is supplied to the security front operation panel. The security front operation panel drives a security unit via a control unit according to the detection signal. The security front operation panel includes an antenna or a light receiving unit that receives a signal from a remote controller, and a processing unit that processes the received signal.

[0008] As described above, the vehicle-mounted device described in the above publication is
When the front control panel for normal operation is installed, it operates as an audio device for listening to cassette tapes and radio broadcasts, while when the front operation panel for security is installed, the sensor changes when the vehicle changes. , The security unit operates as a security device that outputs a warning sound and the like.

Further, as described in Japanese Patent Application Laid-Open No. 1-145251, there is an on-vehicle audio device in which a predetermined key operation is set in advance on the on-vehicle audio device, and the key operation prevents the vehicle from being stolen. The outline of the above publication is described below.

The on-vehicle acoustic device includes an acoustic section, a detecting section, a power supply section, and a key operation section. The sound unit amplifies and outputs the received audio signal such as a radio broadcast and a CD. The detection unit is activated when the anti-theft setting is set, and detects an approach operation in the vehicle. The power supply unit supplies power to the sound unit and the detection unit. The key operation section is operated by a user with a predetermined key when the anti-theft setting is performed.

Here, the operation of the theft-prevention using the on-vehicle acoustic device will be described. When the detection unit detects the approach operation in the vehicle when in the activated state, the detection unit generates an approach operation signal. The power supply unit supplies power to the sound unit, the security unit, and the like according to the approach operation signal. The security unit executes a security operation if a predetermined key operation is not performed within a predetermined time. Further, the security unit executes the security operation if the operation is different from the predetermined key operation even if the key operation is performed within the predetermined time. When the security operation is performed, the sound unit outputs a warning sound using a warning cassette tape or a radio broadcast inserted in advance as a warning sound source. Further, in the vehicle-mounted acoustic device, when a security operation is being performed, key operations other than the key operation unit are invalidated.

As described above, the on-vehicle acoustic device disclosed in the above publication is preset in the key operation unit when the detection unit detects the approaching operation in the vehicle when the anti-theft setting is set. The security operation is performed depending on whether the key operation is properly performed within a predetermined time.

[0013]

However, such a vehicle anti-theft device is expensive because it requires peripheral devices such as a sensor for detecting a change in the vehicle, an output device, an amplifying device and a power supply circuit. In addition, since there is only a limited space inside the vehicle, there is a problem that the installation work requires a great deal of labor.

Further, since the vehicle anti-theft device is designed for each type of vehicle, some devices can be installed only in a specific type of vehicle, and there is a problem that versatility is low.

According to the invention described in Japanese Patent Application Laid-Open No. 8-268182, when performing the anti-theft setting on the in-vehicle device, the user needs to replace the normal front operation panel with the security front operation panel. There is a problem that this replacement requires a lot of trouble.

In the invention described in Japanese Patent Application Laid-Open No. 8-268182, when the anti-theft setting is performed on the in-vehicle device, the user operates the normal front operation panel replaced with the security front operation panel. There is a problem that it needs to be carried and puts great effort on the user.

Further, in the invention described in Japanese Patent Application Laid-Open No. 8-268182, there is a problem that the device becomes expensive because of the provision of the security unit.

According to the invention described in Japanese Patent Application Laid-Open No. 1-145251, it is necessary to set a predetermined key operation when setting the anti-theft using an in-vehicle audio device. Simplicity, there is a problem that a third party can easily release the anti-theft setting, and if the above-mentioned key operation settings are complicated, the user takes time to release the anti-theft setting. is there.

Accordingly, the present invention has been proposed in view of the above-mentioned circumstances, and an object of the present invention is to provide an on-vehicle acoustic device having a vehicle anti-theft function and an anti-theft method.

[0020]

According to the present invention, there is provided an on-vehicle audio device for solving the above-mentioned problems, comprising: an audio signal supply unit for supplying an audio signal; and a volume adjustment unit for adjusting the volume of the audio signal. An audio signal output unit that outputs an audio signal whose volume has been adjusted by the volume adjustment unit, and an in-vehicle audio unit that has an operation unit that operates the audio signal supply unit and the volume adjustment unit.
A sensor for detecting a change in the vehicle and supplying the detected signal to the on-vehicle audio means, and a control means for controlling the operation of the on-vehicle audio means and the sensor.

Such an in-vehicle acoustic device is configured such that when the sensor detects a change in a vehicle when the control unit sets the in-vehicle audio unit in a standby state and activates the sensor, the in-vehicle audio unit performs the operation. The audio unit is changed from a standby state to an activated state by the control unit, and outputs a warning sound from the audio signal output unit.

In order to solve the above-mentioned problems, the anti-theft method according to the present invention comprises an audio signal supply unit for supplying an audio signal, a volume adjustment unit for adjusting the volume of the audio signal, and a volume adjustment unit. An in-vehicle audio unit having an audio signal output unit that outputs a volume-adjusted audio signal is placed in a standby state, a change in the vehicle is detected, and a sensor that supplies the detected signal to the in-vehicle audio unit is activated.

In such a theft prevention method, when the sensor detects a change in the vehicle, the in-vehicle audio unit is switched from a standby state to an activated state, and a warning sound is output from the audio signal output unit.

[0024]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of an on-vehicle acoustic device and a theft prevention method according to the present invention.

The present invention is applied to, for example, an on-vehicle acoustic system 1 configured as shown in FIG.

The on-vehicle acoustic system 1 comprises a battery 10, a key operation unit 11, a remote controller 12
And an on-vehicle acoustic device 13.

The battery 10 is connected to the on-vehicle audio equipment 13 and the like, and supplies electric power to electric equipment of the vehicle.
The key operation unit 11 is connected to the on-vehicle audio device 13. Here, the operation of the key operation unit 11 will be described.
The key operation unit 11 has a plurality of modes. The key operation unit 11 includes, for example, a LOCK mode in which a key can be inserted and removed, and an A function in which an audio function can be used when the engine is stopped.
There are four modes: a CCESSORY mode, an ON mode during engine rotation, and a START mode for starting the engine. According to the setting state of the key operation unit 11,
The on-vehicle audio device 13 takes one of an operation state and a standby state. The remote controller (hereinafter, referred to as a remote controller) 12 is a remote control for controlling the on-vehicle audio device 1
3 is put into an operating state and a standby state.

The on-vehicle audio device 13 includes a power supply unit 20, a sensor 21, a microcomputer (hereinafter, referred to as a microcomputer) 22, an operation display unit 23, a source unit 24,
An electronic volume 25, an amplifier 26, and an audio signal output unit 27 are provided.

The power supply unit 20 is connected to the battery 10, the microcomputer 22, and each component of the on-vehicle audio device 13. The power supply unit 20 supplies power to each component of the on-vehicle audio device 13 under the control of the microcomputer 22.

The sensor 21 is connected to the microcomputer 22. The sensor 21 generates a detection signal when detecting a change in the vehicle, and supplies the detection signal to the microcomputer 21.
The sensor 21 is, for example, a vehicle vibration detection sensor 100 that detects vehicle vibration. The sensor 21 is, for example, a voltage change detection sensor 101 that detects a voltage change of the battery 10. The in-vehicle acoustic system 1 includes the above-described vehicle vibration detection sensor 100 and voltage change detection sensor 101 as the sensor 21. In addition, the sensor 21
It is assumed that any other sensor that detects a change in the vehicle may be used.

The microcomputer 22 is connected to the key operation unit 11, power supply unit 20, sensor 21, operation display unit 23, source unit 24, and electronic volume 25. Here, the operation of the power supply unit 20 and the microcomputer 22 will be described. The microcomputer 22 controls the operation of the power supply unit 20 according to the state of the key operation unit 11. For example, when a key is removed from the key operation unit 11, the power supply unit 20
In accordance with the control of 2, the supply of power to each component of the on-vehicle audio device 13 is stopped. The power supply unit 20
For example, when a key is inserted into the key operation unit 11,
Power is supplied to each component of the on-vehicle audio device 13 under the control of the microcomputer 22.

Here, the security operation of the microcomputer 22 when the sensor 21 detects a change in the vehicle will be described. The vehicle vibration detection sensor 100 detects a vibration of the vehicle caused by an impact or the like. The vehicle vibration detection sensor 10
0 generates a vibration signal according to the level of the vibration magnitude, and supplies the vibration signal to the microcomputer 22. The microcomputer 22 determines whether the vibration signal is equal to or higher than a predetermined level. The microcomputer 22 performs a security operation when the vibration signal is higher than a predetermined level, and does not perform a security operation when the vibration signal is lower than a predetermined level.

The voltage change detection sensor 101 detects a battery 10 generated when an interior light is turned on when a vehicle door is opened.
Voltage change is detected. The voltage change detection sensor 101 is
A voltage change signal is generated according to the magnitude of the voltage change, and the voltage change signal is supplied to the microcomputer 22. Microcomputer 22
Determines whether the voltage change signal is equal to or higher than a predetermined level. The microcomputer 22 performs a security operation when the voltage change signal is equal to or higher than a predetermined level, and does not perform a security operation when the voltage change signal is equal to or lower than the predetermined level.

The operation display section 23 is connected to the microcomputer 22 and receives an operation signal from the remote controller 12. The operation display unit 23 includes a display unit, a source operation unit, and a remote control light receiving unit. The display unit is a vehicle-mounted audio device 13.
The setting state and the operation state of are displayed. The display unit may display information other than the above. The source operation unit performs an operation of selecting a source such as a radio broadcast or a CD. The remote control light receiving unit receives an operation signal from the remote control 12. In the in-vehicle acoustic system 1, the remote controller 12 handles the operation signal using infrared rays, but may use a wavelength band other than infrared rays. The form of the remote control light receiving section of the operation display section 23 changes according to the wavelength band of the operation signal of the remote control 12.

The source section 24 is connected to the microcomputer 22 and the electronic volume 25. The source unit 24 has a plurality of sources such as a radio broadcast, a CD, and a cassette deck. The source section 24 selects a predetermined source from the plurality of sources according to a source selection signal from the microcomputer 22. Then, the source section 24 supplies the audio signal of the predetermined source to the electronic volume 25.

The electronic volume 25 includes a microcomputer 22 and
The source unit 24 and the amplifier unit 26 are connected. The electronic volume 25 adjusts the volume of the audio signal supplied from the source unit 24. And electronic volume 2
5 supplies the audio signal whose volume has been adjusted to the amplifier 26. The electronic volume 25 adjusts the warning sound to the maximum volume when the warning sound is supplied from the microcomputer 22. Then, the electronic volume 25 supplies the warning sound adjusted to the maximum volume to the amplifier 26.

The amplifying section 26 is connected to the electronic volume 25 and the audio signal output section 27. Amplifier 26
Amplifies the audio signal or the warning sound signal supplied from the electronic volume 25 and supplies the amplified signal to the audio signal output unit 27.

The audio signal output unit 27 includes an amplifying unit 26
It is connected to the. The audio signal output unit 27 outputs an audio signal or a warning sound signal supplied from the amplification unit 26.

Next, a series of processes of the microcomputer 22 during the security operation will be described with reference to the flowcharts shown in FIGS.

In step ST1, the microcomputer 22
Checks whether a key has been pulled out from the key operation unit 11 as shown in FIG. Here, if it is confirmed that the key has been pulled out from the key operation unit 11, the process proceeds to step ST2.

In step ST2, the microcomputer 22
Controls the power supply unit 20 to put the on-vehicle audio device 13 into a standby state.

In step ST3, the microcomputer 22
Checks whether a request for security operation settings has been made. Here, when the security operation is requested, the process proceeds to step ST4.

In step ST4, the microcomputer 22
Is set to security operation. The microcomputer 22
For example, the security operation is set by the remote controller 12. When setting the security operation, the microcomputer 22
The sensor 21 is activated. The security operation is set from outside the vehicle. The remote controller 12
When the security operation is set, the door of the vehicle may be locked automatically.

The microcomputer 22 may set a security operation by pressing a security operation button provided on the operation display unit 23. However, in this case, after the security operation button is pressed, the time for the user to go out of the vehicle is set in advance, and the security operation is set after the elapse of the time. Also,
When the security operation is set, the door of the vehicle may be locked automatically.

In step ST5, the microcomputer 22
Confirms whether a detection signal indicating a change in the vehicle is supplied from the sensor 21. Here, when the detection signal is supplied from the sensor 21, the process proceeds to step ST7, and when the detection signal is not supplied from the sensor 21, the process proceeds to step ST6.

In step ST6, the microcomputer 22
Confirms whether there has been a request to cancel the setting of the security operation. The request to release the setting of the security operation is made by the remote controller 12. The door of the vehicle may be automatically unlocked together with the request for canceling the setting of the security operation. If no request for canceling the setting of the security operation is made, step ST
Return to 5.

In step ST7, the microcomputer 22
Determines whether the detection signal supplied from the sensor 21 exceeds a predetermined level. Here, the sensor 21
When it is determined that the detection signal supplied from the sensor 2 does not exceed the predetermined level, the process returns to step ST5 and the sensor 2
If it is determined that the detection signal supplied from 1 exceeds a predetermined level, the process proceeds to step ST8.

In step ST8, the microcomputer 22
Controls the power supply unit 20 to bring the on-vehicle audio device 13 into an operating state, as shown in FIG.

In step ST9, the microcomputer 22
Generates a warning sound signal.

In step ST10, the microcomputer 22
Supplies a warning sound signal to the electronic volume 25. The electronic volume 25 adjusts the warning sound signal to the maximum volume.
Then, the electronic volume 25 supplies the warning sound signal adjusted to the maximum volume to the amplifier 26. The amplifier 26 outputs a warning sound signal having the maximum volume. The electronic volume 2
5 may adjust the warning sound signal to a predetermined volume. Further, the microcomputer 22 has a
, Or an audio signal such as a CD or a cassette tape.

In step ST11, the microcomputer 22
Determines whether the set time has elapsed. If it is determined that the output time of the warning sound signal has passed the set time, the process proceeds to step ST13. If it is determined that the output time of the warning sound signal has not passed the set time, the process proceeds to step ST12.

In step ST12, the microcomputer 22
Confirms whether a request to cancel the setting of the security operation has been made. If the request for canceling the setting of the security operation is not made, the process returns to step ST11. If the request for canceling the setting of the security operation is made, the process returns to step ST11.
Proceed to T13.

In step ST13, the microcomputer 22
Stops supplying the warning sound signal. The setting of the security operation of the microcomputer 22 is released by the remote controller 12. When canceling the setting of the security operation, the microcomputer 22 stops the warning sound signal and puts the sensor 21 in a standby state.
Further, when the setting of the security operation is released by the remote controller 12, the door of the vehicle may be automatically unlocked.

When the set time has elapsed (step ST11) and the supply of the warning sound signal is stopped (step ST13), the microcomputer 22 may automatically set the security operation again (step ST4). .

As described above, the on-vehicle acoustic system 1 includes:
When a change in the vehicle is detected by the sensor 21 when the security operation is set by the remote controller 12, a detection signal is generated, and it is determined whether or not the generated detection signal exceeds a predetermined level. Then, when the in-vehicle acoustic system 1 determines that the above detection signal exceeds the predetermined level, it outputs a warning sound signal from the audio signal output unit 27.

[0056]

As is apparent from the above description, the audio device for vehicle according to the present invention includes an audio signal supply unit for supplying an audio signal, a volume adjustment unit for adjusting the volume of the audio signal, An audio signal output unit that outputs an audio signal whose volume has been adjusted by the volume adjustment unit,
An in-vehicle audio unit having an operation unit that operates the audio signal supply unit and the volume adjustment unit; a sensor that detects a change in a vehicle and supplies the detected signal to the in-vehicle audio unit; Control means for controlling the operation of the sensor, wherein the control means sets the on-vehicle audio means in a standby state, activates the sensor, and detects when the sensor detects a change in the vehicle. The audio unit is changed from the standby state to the operating state by the control unit, and outputs a warning sound from the audio signal output unit. And prevent the vehicle from being stolen without requiring much labor, such as the installation of a dedicated vehicle anti-theft device. It is possible.

Also, in the anti-theft method according to the present invention, an audio signal supply unit for supplying an audio signal, a volume adjustment unit for adjusting the volume of the audio signal, and an audio signal whose volume is adjusted by the volume adjustment unit are output. The vehicle-mounted audio unit having an audio signal output unit that performs a standby state, detects a change in the vehicle, activates a sensor that supplies the detected signal to the vehicle-mounted audio unit, and detects a change in the vehicle by the sensor. In addition, the in-vehicle audio unit can be put in the standby state, the activated state, and the warning signal can be output from the audio signal output unit, so that the vehicle type can be used without limitation and the vehicle can be prevented from being stolen. .

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a vehicle-mounted acoustic system to which the present invention is applied.

FIG. 2 is a flowchart illustrating an example of a security operation of the vehicle-mounted acoustic device to which the present invention is applied.

FIG. 3 is a flowchart continued from FIG. 2;

[Explanation of symbols]

Reference Signs List 1 on-board acoustic system, 10 battery, 11 key operation unit, 12 remote controller, 13 on-board acoustic device, 20 power supply unit, 21 sensor, 22 microcomputer, 23 operation display unit, 24 source unit, 2
5 electronic volume, 26 amplification section, 27 audio signal output section

Claims (9)

[Claims] An audio signal supply unit that supplies an audio signal; a volume adjustment unit that adjusts a volume of the audio signal; an audio signal output unit that outputs an audio signal whose volume is adjusted by the volume adjustment unit; An in-vehicle audio unit having an audio signal supply unit and an operation unit for operating the volume control unit; a sensor for detecting a change in a vehicle and supplying the detected signal to the in-vehicle audio unit; Control means for controlling the operation of the vehicle-mounted audio means, the control means sets the vehicle-mounted audio means in a standby state, the sensor is activated, and when the sensor detects a change in the vehicle, the vehicle-mounted audio means The unit is changed from a standby state to an operating state by the control unit, and outputs a warning sound from the audio signal output unit. An on-vehicle acoustic device, characterized in that: 2. A remote control means for remotely controlling the control means, wherein the control means sets the on-board audio means in a standby state or an operation state by the remote control means, and activates or standbys the sensor. The on-vehicle acoustic device according to claim 1, wherein: 3. The on-vehicle acoustic device according to claim 2, wherein the control means stops the warning sound in response to a request for stopping the warning sound by the remote control means. 4. The in-vehicle audio means further includes a sensor activation button for activating the sensor, and the control means causes the in-vehicle audio means to be in a standby state by the sensor activation button and to activate the sensor. The on-vehicle acoustic device according to claim 1, wherein: 5. The on-vehicle acoustic device according to claim 1, wherein said sensor is a vibration detection sensor for detecting vibration of a vehicle. 6. The on-vehicle acoustic device according to claim 1, wherein the sensor is a voltage fluctuation detection sensor for detecting a fluctuation in the voltage of the on-vehicle battery. 7. The sensor according to claim 1, wherein the sensor is a vibration detection sensor that detects a vibration of the vehicle and a voltage fluctuation detection sensor that detects a fluctuation in the voltage of the vehicle-mounted battery.
A vehicle-mounted acoustic device according to claim 1. 8. A vehicle equipped with an audio signal supply unit for supplying an audio signal, a volume adjustment unit for adjusting the volume of the audio signal, and an audio signal output unit for outputting the audio signal whose volume has been adjusted by the volume adjustment unit. The audio unit is set to a standby state, a change in the vehicle is detected, a sensor that supplies the detected signal to the in-vehicle audio unit is set to an activation state, and when the sensor detects a change in the vehicle, the in-vehicle audio unit is changed from the standby state. A theft prevention method comprising: activating a state; and outputting a warning sound from the audio signal output unit. 9. The anti-theft method according to claim 8, wherein said sensor is remotely operated to be activated.