JPH111146A - Vehicle sound system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance concentration force of a driver when a brake lock state is generated by automatically reducing output sound volume of a speaker connected with an acoustic device when the operation of an ABS is detected. SOLUTION: An ABS controller 1 which is a detection circuit detecting a brake lock state is connected with a control circuit 4 and the control circuit 4 is connected with an acoustic device 5 and a speaker 6. The control circuit 4 decides whether the ABS is operating or not from the output signal of the ABS controller 1. When the ABS is operating, a coil 81 of a relay circuit 8 is energized via an OR gate 7. As a result, a contact 82 of the relay circuit 8 is switched from an initial state to a contact on the opposite side. In the initial state, an output signal of the acoustic device 5 which does not pass an attenuator circuit 9 is inputted in a speaker 6 in a form that the output signal is attenuated via the attenuator circuit 9. Thus, output sound volume of the speaker 6 can be suppressed when the ABS is operated.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an acoustic device for a vehicle, and more particularly, to an acoustic device for a vehicle provided in a passenger compartment of an automobile.

[0001]

2. Description of the Related Art At present, most vehicles, from passenger cars to large trucks, are equipped with an acoustic device such as a radio.

[0002] This is used for checking road conditions such as traffic information while the vehicle is running, and for enjoying music that one likes in the vehicle. Therefore, the driver usually uses the vehicle while driving.

[0003] On the other hand, when the vehicle is moved backward in a garage or when passing through a narrow road or the like, the surrounding situation cannot be completely confirmed only by mirrors or visual inspection.
Drivers often move vehicles while opening windows and doors and visually checking the rear.

[0004] In such a case where the vehicle is driven while paying sufficient attention to the surroundings of the vehicle, if an acoustic device is used, even if the volume is not a problem in normal driving, the small sound outside the vehicle is canceled out, making it difficult to hear. It can be dangerous.

Therefore, various measures have been taken to prevent noise from outside the vehicle from entering the inside of the vehicle. For example, Japanese Utility Model Application Laid-Open No. 60-11251 or 62-15.
Japanese Patent No. 3155 proposes a device that detects a state in which the vehicle is driven backward and lowers the output volume of the acoustic device at this time.

Japanese Utility Model Laid-Open Publication No. Sho 61-104626 proposes a device for detecting that a door of a vehicle is opened and lowering the output volume of an acoustic device at this time.

[0007]

In such a conventional example, the volume of the sound device is reduced by detecting when the vehicle is moving backward or when the window is opened. Alternatively, there is an appropriate time allowance before opening the window, and it is relatively easy to lower the volume of the audio device by volume operation.

On the other hand, in recent years, ABS (anti-brake lock system) has been used as a technique for eliminating the "brake lock state" in which the vehicle locks and slips during sudden braking or braking on slippery roads such as snowy roads. Systems) Vehicles equipped with a controller are becoming widespread.

At the time of such a brake lock, the driver must concentrate on driving in order to grasp the behavior of the vehicle. In addition, depending on the situation, it is necessary to accurately determine the situation of the vehicle by listening to sounds outside the vehicle.

However, in a vehicle equipped with ABS, although the ABS controller constantly monitors the brake lock state, the brake lock state does not normally occur unless a sudden brake or the like is applied, so that danger at the time of brake lock is avoided. Therefore, there is no time to reduce the volume of the audio device in the vehicle by the volume operation as described above, and there is a problem that the above-described conventional example cannot cope.

Similarly, in a vehicle equipped with a corner sensor for detecting not only a brake lock state but also a nearby obstacle, the presence or absence of a nearby obstacle cannot be predicted by the driver. The volume needs to be reduced automatically.

Further, it is necessary to automatically reduce the output volume of the sound device even when the driver turns on a hazard switch operated when the driver feels a danger or an emergency.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a vehicular acoustic apparatus that automatically reduces the output sound volume when a brake lock is detected, a close obstacle is detected, or when a hazard switch is turned on.

[0014]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a vehicular acoustic apparatus according to the present invention has a detection circuit for detecting that an ABS is operating, and a detection circuit for detecting that the ABS is operating. And a control circuit for reducing the output signal level to the speaker.

That is, according to the present invention, when it is detected that the ABS is operating, the output volume of the speaker connected to the audio device is automatically reduced, so that when the brake lock state occurs, the driver is prevented. It does not impair the driver's concentration, thereby enabling safe driving.

Further, according to the present invention, it is possible to provide a corner sensor, and a control circuit for reducing an output signal level to a speaker when the corner sensor detects an approaching obstacle.

That is, in the present invention, a vehicle approaches an obstacle by using a corner sensor instead of the above-described ABS and automatically lowering the output volume of the speaker when the corner sensor detects an approaching obstacle. When the driver is able to drive carefully.

Further, in the present invention, a hazard switch,
A control circuit for reducing the output signal level to the speaker when the hazard switch is turned on.

That is, in the present invention, a hazard switch is used in place of the corner sensor, and when the hazard switch is turned on, the output volume of the speaker is automatically reduced, so that the driver may feel in danger. We are careful to drive.

[0020]

1 shows an embodiment of a vehicle acoustic apparatus according to the present invention. In this embodiment, an ABS controller, a corner sensor for detecting an obstacle close to the vehicle, and a hazard switch operated by a driver in a danger state or an emergency state are provided as a detection circuit for detecting a brake lock state. .

In this embodiment, the ABS controller, the corner sensor and the hazard switch are used together, but at least one of them may be used. Although these output lines originally exist in various forms,
For convenience, only signals necessary for the present invention are shown. The corner sensor converts an analog signal into a digital signal by an internal A / D converter (not shown) and outputs the digital signal.

These ABS controller, corner sensor and hazard switch are connected to a control circuit.
The control circuit is connected to the audio device and the speaker.

The control circuit further receives an output signal of the ABS controller, the corner sensor and the hazard switch and takes an OR of the signals, and a relay which receives the output signal of the OR gate and switches the output signal of the audio device. It is composed of a circuit and an attenuator circuit which is turned on / off by a control signal of a relay circuit. The output signal of the attenuator circuit is connected so as to be given to a speaker.

Next, the operation of the control circuit of this embodiment will be described with reference to the flowchart shown in FIG.

First, the control circuit determines from the output signal of the ABS controller whether or not the ABS is operating (step S1 in FIG. 2).

As a result, when it is determined that the ABS is operating, the coil 81 of the relay circuit is excited via the OR gate (step S4). When the coil 81 is excited, the contact 82 of the relay circuit is switched from the illustrated initial state to the opposite contact.

Therefore, although the output signal of the audio device did not pass through the attenuator circuit in the initial state, the contact 8
2 is switched, this time via the attenuator circuit (step S5), the level is given to the speaker in an attenuated form.

Therefore, when the ABS is activated while the vehicle is braking suddenly or running on a snowy road, the output signal level of the sound device is reduced and given to the speaker, so that the driver concentrates on safe driving. It becomes possible.

Next, when it is determined in step S1 that the ABS is not operating, it is determined whether or not the output signal of the corner sensor has been turned ON (step S2).

When this output signal is ON, that is, when the vehicle is approaching an obstacle such as a side wall, for example,
As in the case of the ABS, the relay circuit is driven via the OR gate (step S4), and the attenuator circuit is turned on, that is, the output signal of the audio device is attenuated and given to the speaker (step S5).

Next, when it is determined in step S2 that the output signal of the corner sensor is OFF (when there is no obstacle in proximity), it is determined whether the output signal of the hazard switch is ON (step S2). S
3).

When this output signal is ON, that is, when the driver is turning on the hazard switch, the OR signal is output as in the case of the ABS or corner sensor.
Drive the relay circuit through the gate (step S
4), the attenuator circuit is turned on, that is, the output signal of the audio device is attenuated and given to the speaker (step S5).

In steps S1 to S3, AB
When S, proximity obstacle, and hazard switch on are not detected, the OR gate does not drive the relay circuit because all the input signals are logic "0" (the same step S6), and the contact 82 is set to the illustrated position. Since the state is maintained, the attenuator circuit does not operate and is in the OFF state, and the output signal of the audio device is given to the speaker without being attenuated.

[0034]

As described above, in the vehicular acoustic apparatus according to the present invention, the output signal level to the speaker is detected when the operation of the ABS is detected, when the corner sensor detects an approaching obstacle, or when the hazard switch is turned on. The output volume of the loudspeaker can be reduced when the brake is locked, when the vehicle approaches an obstacle, or when the driver turns on the hazard switch in danger / emergency, respectively. Safe driving can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration example of a vehicle acoustic device according to the present invention.

FIG. 2 is a flowchart illustrating an operation example of a control circuit used in the vehicle acoustic device according to the present invention.

[Description of References] ABS Controller Corner Sensor Hazard Switch Control Circuit Audio Device Speaker OR Gate Relay Circuit Attenuator Circuit In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (3)

[Claims] A detection circuit for detecting that the ABS is operating; and a control circuit for reducing the output signal level to the speaker when the detection circuit detects that the ABS is operating. Sound equipment for vehicles. 2. A vehicle acoustic device comprising: a corner sensor; and a control circuit for reducing an output signal level to a speaker when the corner sensor detects an approaching obstacle. 3. An acoustic device for a vehicle, comprising: a hazard switch; and a control circuit for reducing an output signal level to a speaker when the hazard switch is turned on.