JPH0737997Y2 - Vehicle alarm system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a vehicle alarm device, and more particularly to a vehicle alarm device that outputs an alarm sound.

[Conventional technology]

2. Description of the Related Art In recent years, vehicle alarm devices have been used to warn a driver of various dangerous states of a vehicle, and also to warn the surroundings of the backward movement of the vehicle to prevent accidents resulting from this.

Proposed as a warning device for such vehicles
The device disclosed in Japanese Patent No. 94245 is equipped with an alarm buzzer that operates when it detects that the shift gear has been shifted to the reverse position, and the sound of this alarm buzzer warns the backward movement of the vehicle. The device disclosed in Japanese Laid-Open Patent Publication No. 56-77455 includes an alarm detection unit and an alarm output unit that outputs an alarm sound in response to the alarm detected by the alarm detection unit, and the sound is issued. .

[Problems to be solved by the device]

However, Japanese Utility Model Publication No. 55-94245 and Japanese Utility Model Publication No.
In the conventional device disclosed in 6-77455, an alarm sound (voice)
The output device is a single unit, so depending on the output frequency, the listener may output an alarm sound (voice) (alarm target).
There is a problem in that it is difficult to obtain the direction to the vehicle, and particularly in the case of a backward warning device for a vehicle, it is difficult to know the approaching direction of the backward vehicle, which is dangerous.

Therefore, an object of the present invention is to provide an alarm device for a vehicle that allows a listener to recognize the directionality of an alarm output device (alarm target).

[Means for Solving the Problems]

To achieve the above object, in a vehicle alarm device according to the present invention, a circuit for determining a vehicle alarm condition, an oscillation circuit for generating a predetermined acoustic signal when the alarm condition is satisfied, and the acoustic At least one delay circuit that delays the phase of a signal, an amplifier circuit that amplifies the acoustic signal as it is and gives it to the corresponding acoustic output device, and another acoustic output device that amplifies the output signal from the delay circuit and corresponds to it. And another amplifying circuit for feeding to.

[Action]

The present invention has been made in view of the fact that the ergonomically effective stereo effect is most recognizable when the plurality of alarm sounds (voices) each have a phase difference of about 0.6 msec to 2 msec. Therefore, in order to realize this phase difference, it is preferable to simultaneously output the alarm from the circuit that outputs the alarm sound as it is and the circuit that delays the phase of the alarm sound and then outputs the alarm sound.

Based on such a principle, in the present invention, the alarm condition determination circuit monitors the alarm conditions of various devices of the vehicle, and when the alarm conditions are satisfied, the oscillation circuit generates an acoustic signal, and the acoustic signal is generated by one amplifier circuit. Then, the other amplifier circuits amplify the sound signals as they are, and the other amplifier circuits amplify the acoustic signals whose phases are delayed by one or more phase delay circuits provided between these oscillator circuits and the acoustic signals of a speaker or a buzzer. Give to the output device.

As a result, an alarm sound (voice) having a phase difference can be given to the listener, so that the sound source direction of the alarm device can be recognized.

〔Example〕

FIG. 1 shows an embodiment of a vehicle alarm device according to the present invention, in which 1 is an alarm condition judging circuit, 2 is an oscillating circuit which oscillates an acoustic signal when an alarm condition is satisfied, and 3 is well known. The acoustic signal input from the oscillating circuit 2 by using the BBD element etc. is given a time delay (that is, a phase difference with respect to the input signal) as shown in FIG. A delay circuit, 4a is an amplification circuit for amplifying the acoustic signal output from the oscillation circuit 2, 4b is an amplification circuit for amplifying the acoustic signal output from the phase delay circuit 3, and 5a and 5b are amplification circuits 4a,
It is an acoustic output circuit that converts each of the electrical output signals of 4b into an acoustic signal and outputs it as an alarm sound (voice).

In the operation of such an alarm device, for example, when the vehicle is in a backward state, the alarm condition judging circuit 1 judges this and gives a corresponding output signal to the oscillating circuit 2, so that the oscillating circuit 2 makes a predetermined output. Generates a single frequency electrical or speech synthesis signal.

The output signal of the oscillator circuit 2 is amplified as it is by the amplifier circuit 4a and is generated as an alarm sound (voice) signal by the acoustic output device 5a. However, in the phase delay circuit 3, a predetermined phase delay amount is added to the output signal of the oscillator circuit 2. After being converted into a signal given by, the signal is amplified by the amplifier circuit 4b, converted into an electric-acoustic signal by the acoustic output device 5b, and output.

Thereby, an alarm sound (voice) having a phase difference can be given to the listener, and the sound source direction of the alarm device can be recognized.

Although two sound sources are used in the above embodiment, the sound source direction can be recognized by using two or more sound sources without being limited to this.

Further, the present invention is not limited to the alarm device of the vehicle, but can be applied to general alarm devices that give an alarm using sound or voice.

[Effect of device]

As described above, the vehicle alarm device according to the present invention is configured to output the acoustic signals having the phase difference from the plurality of acoustic output devices. It becomes easy to recognize the direction (or the approach direction). As a result, it is possible to obtain the effect that the time until the risk recognition / avoidance action is shortened, and the safety is improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a vehicle alarm device according to the present invention, and FIG. 2 is a diagram for explaining phase delay. In FIG. 1, 1 is an alarm condition determination circuit, 2 is an oscillation circuit, 3 is a phase delay circuit, 4a and 4b are amplification circuits, and 5a and 5b are acoustic output devices (speakers and buzzers), respectively.

Claims (1)

[Scope of utility model registration request] 1. A circuit for determining an alarm condition of a vehicle, an oscillation circuit for generating a predetermined acoustic signal when the alarm condition is satisfied, and at least one delay circuit for delaying the phase of the acoustic signal, An amplifying circuit for amplifying an acoustic signal as it is and giving it to a corresponding acoustic output device, and another amplifying circuit for amplifying an output signal from the delay circuit and giving it to another corresponding acoustic output device. The vehicle alarm system.