JPS6181833A - Signal sound discriminator for car - Google Patents

Abstract

PURPOSE:To enable discrimination of external alarm sound even for person of hard hearing by converting a signal discriminated from external sound into specific audio frequency signal then further converting into an acoustic signal. CONSTITUTION:Upon reception of winker sound of one's own car through a microphone 2, the voltage signal is removed of low band component through an alarm sound detection circuit 2 and a winker sound detection circuit 3 and the signal containing high frequency component will pass through flipflops 4, 5 to produce a rectangular wave which is fed through OR gate 7 to AND gate 8. When any one of them will go to H level, AND gate 8 will produce a signal through an audio frequency signal generator 9 which is sound converted through a voice output unit 10 with predetermined time interval set through a timer 6. Consequently, the driver can discriminate the winker sound of his own car or the external alarm sound easily.

Description

[Detailed description of the invention] <Technical field of invention> The present invention relates to a signal sound identification device for a vehicle.

<Prior art and its problems> Conventional vehicles such as automobiles are not equipped with a device to identify alarm sounds from other vehicles, turn signal sounds of own troops, etc.
Therefore, it is extremely dangerous for hearing-impaired people, such as elderly people, to drive.

<Objective of the Invention> An object of the present invention is to provide a vehicle signal sound identification device that allows 1M listeners to drive safely.

<Structure and Effects of the Invention> In order to achieve the above object, the present invention comprises means for converting sounds inside and outside the vehicle into electrical signals, means for identifying a predetermined signal from the signals of the sounds inside and outside the vehicle, and a means for identifying a predetermined signal from the signals of the sounds inside and outside the vehicle, and The present invention is characterized by comprising means for converting the signal into a predetermined audio frequency signal, and means for converting the audio frequency signal into an acoustic signal.

Therefore, according to the present invention, even AI listeners can identify alarm sounds and the like outside the vehicle, making it possible to drive the vehicle safely.

<Embodiments of the invention> The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram of a first embodiment of the present invention.

Microphone 1 placed anywhere in the vehicle (not shown)
The output terminals of are connected to the alarm sound detection circuit 2 and blinker sound detection circuit 3, respectively.The 1g alarm sound detection circuit 2 has a bypass filter (HPF) for identifying and extracting the alarm sound of the vehicle outside the vehicle. The blinker sound detection circuit 3 has:
It has a bypass filter (HPF) to identify and extract the blinker sound of your own vehicle.

The output terminals of the alarm sound detection circuit 2 and the blinker sound detection circuit 3 are connected to the set terminal S of the blip-flop (FF (, 1)) 4 and the set terminal S of the flip-flop (FF (2)) 5, respectively. . A timer 6 that generates a clock pulse every 5 seconds is connected to the reset terminal R of the flip-flop 4 and the reset terminal R of the flip-flop 5. Note that the time interval of the clock pulses of the timer 6 is not limited to 5 seconds, but is arbitrary. Furthermore, flip-flops 4 and 5 are set-priority flip-flops (R-S-5
FF), and therefore a rectangular wave corresponding to the alarm sound and blinker sound is output from the Q terminal.

The Q terminals of flip-flops 4 and 5 are each connected to the input terminal of 90R gate 7, and the output terminal of OR gate 7 is connected to one input terminal of AND gate 8 and the reset terminal of timer 6. .

Connected to the other input terminal of the AND gate 8 is an audio frequency signal generator 9 that generates a 3 KHz signal.

Here, the output frequency of the audio frequency signal generator 9 is set to 3KHz.
This is because the human ear is generally most sensitive to sounds at this frequency. However, the output frequency may be made variable to accommodate individual differences among drivers.

The output terminal of the AND gate 8 is connected to an audio output device 10 having an amplifier (Amp) and a speaker (Sp). Here, earphones may be used instead of the speaker of the audio output device 10, or the entire audio output device 10 may be used as a car radio or the like.

The operation of the above embodiment will be explained with reference to the timing chart of FIG.

When the microphone 1 shown in FIG. 1 receives a warning sound from another vehicle or a blinker sound from one's own troops, it is converted into a voltage signal proportional to the sound.

The above voltage signals are respectively output from the alarm sound detection circuit 2. When the low frequency component is removed by the blinker sound detection circuit 3, the result shown in FIG.
As schematically shown in 1) and (2), signals containing high frequencies are obtained. Signal (1).

(2) respectively pass through flip-flops 4.5, the signals (1) and (2) are shown in Figure 2 (3) and (4).
) is obtained.

The OR gate 7 outputs a signal that becomes high level at a time when either signal (3) or (4) becomes high level.

That is, this signal is a signal that becomes high level when either the alarm sound or the blinker sound is received.

Therefore, the AND gate 8 outputs the signal from the audio frequency signal generator 9 during the time when the output signal of the OR gate 7 is at a high level. The signal from the generator 9 is electro-acoustic converted by the audio output device 10 (FIG. 2 (5)),
In other words, the driver.

Audio output device 1 for external alarm sounds and own army blinker sounds
It can be identified by the signal from 0.

In the embodiment described above, when either the alarm sound or the blinker sound is received, the same signal is used to make the driver perceive it, but it is also possible to use different signals for each reception sound. FIG. 3 is a block diagram of the embodiment of FIG. 2, in which the same components as in FIG. 1 are given the same reference numerals.

In Fig. 3, 6a is a timer that generates a Glock pulse every 1 second, 11 is an oscillator that generates a rectangular wave signal with a period of 3 seconds and a pulse occupancy rate of 50%, and 12 is an oscillator that generates a rectangular wave signal with a period of 1 second and a pulse occupancy rate of 50%. □oscillator that generates a square wave signal, 13,1
4.8a and 8b are AND gates, and 15 is an OR gate. It is assumed that the oscillator 12 and a turn signal (not shown) are synchronized.

The operation of the embodiment shown in FIG. 3 will be explained with reference to the timing chart shown in FIG. FIG. 4(A) shows a case where an alarm sound is identified, and FIG. 4(B) shows a case where a blinker sound is identified.

Assuming that the alarm sound and turn signal sound shown in FIG. 4(A)(1) and FIG.
The result is a rectangular wave signal shown in (a) (2) and (b) (2). The AND gates 13, 14 therefore each oscillator 1
1 signal (Fig. 4 (a) (3)), the signal of oscillator 12 (
Figure 4 (b) (3)) Signals and flip-flops 4 and 5
outputs an AND signal with the output signal of In other words, the audio output device 10 outputs an alarm sound at 3 second intervals (Fig. 4 (a) (4)).
), the driver is made to perceive a win sound at one-second intervals.

Although the two embodiments described above are configured to identify both the alarm sound and the blinker sound, it goes without saying that either one of them may be used.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a first embodiment of the present invention. 2 is a timing chart showing the operation of the embodiment of FIG. 1, FIG. 3 is a block diagram of the second embodiment of the present invention, and FIG.
The figure is a timing chart for explaining the embodiment of FIG. 3, and FIG. This is a timing chart. 1...Microphone, 2...Alarm sound detection circuit, 3.
... blinker sound detection circuit, 4, 5 ... flip-flop, 9 ... audio frequency signal generator, 10 ... audio output device. 11.12... Oscillator.

Claims (1)

[Claims] means for converting sounds inside and outside the vehicle into electrical signals; means for identifying a predetermined signal from the signals of the sounds inside and outside the vehicle; means for converting the identified signal into a predetermined audio frequency signal; and the audio frequency signal. A vehicle signal sound identification device having means for converting a signal into an acoustic signal.