JPS5830214A - Acoustic information generating device - Google Patents

Abstract

PURPOSE:To distinctly transfer acoustic information to a driver even if it is affected by an external noise, by constituting so that sound volume to be outputted is increased by being interlocked, when said information has been set to a state which is susceptible to influence of the external noise. CONSTITUTION:When a door of an automobile is closed, a door switch 18 is opened, and a transistor TR19 is in an on-state. Accordingly, a resistance 21 is connected in parallel with voltage dividing resistances 16, 17, and a part of an input current to an amplifier 13 is shunted, therefore, an output of a loudspeaker 12 is suppressed. When the door is opened, the door switch 18 is closed, the TR19 becomes an off-state, and the resistance 21 is disconnected. Accordingly, an input to the amplifier 13 is increased, and a sound output from the loudspeaker 12 is also increased. Therefore, it is possible to offset influence of an external noise caused by opening the door.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an acoustic information generating device, and particularly to a volume control circuit thereof.

The following is an error caused by the driver's operation when installed in a car.

Devices such as ll@ devices that point out things like forgetting to turn off a switch, and voice control devices that give appropriate advice to the driver depending on the driving situation (these are collectively called acoustic information generating devices).

) will be explained using an example.

Conventionally, in these devices that transmit information by appealing to the driver's auditory senses, the output volume is always constant except when the driver himself or herself turns the volume control. Therefore, when the car door is opened, the alarm cannot be heard clearly due to external noise.

This invention was made in consideration of the above points, and automatically detects when the environment is easily affected by external noise, such as when a door or window is opened. It is an object of the present invention to provide an acoustic information generating device that can increase output volume.

FIG. 1 is a circuit configuration diagram showing an embodiment of the present invention.
) is the power supply battery, (2) is the alarm buzzer, +33 is the transistor that drives this buzzer (2), and (4) is the transistor (AND that supplies the output to the pace of 31).
) gates, (5) and (6) are switches that respectively give signals to the two AND gates (4), and (5) is a seatbelt switch that closes when the car is not turned on. +71 is a resistor connected in series to the buzzer (2) to limit its current, +83 is a door switch that closes when the door is opened, and (9) is a resistor (connected in parallel to 71, which closes the door switch (8). The transistor (9) that conducts when the current is turned on is a pace resistor that limits the pace current of the transistor (9).

switch (5) and door switch (8) are open.

This indicates that the driver is not wearing a seatbelt, the ignition key is not inserted, and the door is closed.

At this time, one input of the AND gate (4) is high (“H”).
) level, but the other input is low (“°r, II
) level, the output of this AND gate (4) is at L', and the transistor (31 is cut off (01rF)
It is in the OFF state.

Next, the driver inserts the key and the ignition key switch (5
) is closed, the input to the ignition key switch (5) side of the AND gate (4) becomes ``H'' level. At this time, if the driver is fastening his or her seatbelt, the seatbelt switch (6) is open, and the input to the AND gate (4) connected to this is at L'' level, and the AND gate [4] is open.
The output of 1 is at the ``ILI+ level, and the output of transistor (3
1 is kept in the OFF state. Therefore, the buzzer (2) does not sound. However, if the driver forgets to fasten his or her seat belt and the ignition key switch (5) is closed, the output of the AND gate (4) will be II/HII since the seat belt switch is also closed. As a result, the transistor (31) becomes conductive (ON), and current is supplied to the buzzer (2) from the battery (1) through the resistor (71), causing it to sound.

In this example, the resistance value of the resistor (7) is set to the buzzer (2).
), and 1/2 of the voltage of the battery fi+ is applied to the buzzer (2).

Next, in this state 1a, when the driver opens the door, the door switch (81) closes and a current is supplied to the transistor (9) via the pace resistor, which turns on and resists the This results in both ends of (7) being shorted, causing the buzzer (
The full voltage of battery (1) is applied to 2), and the sound is louder than when the door was previously closed. That is, in this case, even if there is an influence of foreign noise due to the door opening, the alarm can be heard clearly enough.

FIG. 2 is a circuit configuration diagram showing another embodiment of the present invention.
■) is the power battery, 021 is the speaker, 01 is the speaker (
The amplifier that drives I21, the a-curve, is the switch group Q5, which will be described later.
) is a voice control circuit that makes logical decisions based on the open/closed state and generates voice output to provide information to the driver.

('5b) * ・= A switch group consisting of (15n), H, aη is connected in parallel with the human power signal from the voice control circuit H to the amplifier - to the output of the door switch (+8 when closed). The transistor that cuts off the output and increases the parallel impedance of the above output is a transistor (I@
I2υ is the collector circuit resistance of the transistor/diss, riH, which is connected to the pace and makes the door switch (transistor α9 when the I conductor is open) conductive.

In this embodiment, the voice control circuit H includes a switch group (+5)
The device is configured to perform logical identification according to the opening/closing operation of the device, and generate an alarm or audio information based on the results. Then, the outputs are level-adjusted by voltage dividing resistors Q and αη and input to an amplifier a, where they are amplified and notified to the driver through a speaker (121).For example, the seat belt in the switch group (15) The switch is closed (
If the driver forgets to fasten his/her seat belt and the ignition key switch is closed by plugging in the ignition key switch, a voice signal saying "fasten your seat belt" will be issued, reminding the driver to be careful.

At this time, when the car door is closed,
The door switch (181 was opened in the illustrated manner and died,
A current is supplied to the base of the transistor 01 via the base resistor (E), and the transistor 01 is turned on. Therefore, when the resistor is a voltage dividing resistor, it is connected in parallel to the + power, and part of the input current to the amplifier Q is shunted, so the output volume from the speaker O is suppressed. However, when the first person opens the door in such a state, the door switch UFj closes and the pace of transistor 4 becomes 1lLl+ level, so that transistor t19). Becomes sweaty and resists -
is separated. Therefore, the input to the amplification spring increases, and the audio output from the speaker H also increases. Therefore, f#-so of the external noise caused by opening the door can be canceled out.

In each of the above embodiments, the case of forgetting to fasten the seat belt has been explained as an example, but there are various other types of e-reports and audio information, and the judgment method is also based on the open/closed state of the switch. Although we have shown a method of determining a result based on the above, it goes without saying that other means may be used. [Jt control is not limited to opening and closing doors, but may also be applied to opening and closing windows, and may also be switched depending on day and night.

Furthermore, the application target is not necessarily limited to automobiles.

As detailed above, 1. When the acoustic information generating device according to the present invention is placed in a state where it is easily affected by external noise,
In conjunction with this, the output sound cover is increased, so acoustic information can be clearly transmitted to the driver even when affected by foreign noise.On the other hand, when the noise is low, the output f cover is small, so it is possible to clearly transmit acoustic information to the driver. It also has the effect of not causing any inconvenience.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing one embodiment of the invention, and FIG. 2 is a circuit diagram showing another embodiment of the invention. In the figure, (2) is a buzzer, and 021 is a speaker C (2).
). C(5) corresponds to the sound output device), (5) corresponds to the ignition key switch, tfl) corresponds to the seat belt switch, σ5) corresponds to the switch 2, and θ5) corresponds to the voice detection means. ], (4) is at gate, 04) is acoustic control circuit (
(41, U corresponds to the control circuit), (8J, 0
8) is the door switch, (9). (19) is a transistor (volume adjustment means). Agent Shin Kuzuno - (1 other person)

Claims (1)

[Claims] +11 A plurality of detection means each responsive to the state of a plurality of parts of the structure operated by the driver, control that makes a logical judgment based on the outputs of the plurality of detection means and outputs a required output. A circuit and a sound output device that outputs predetermined sound information in accordance with the output of the control circuit, the sound output device being interlocked with the sound output device when it is in a state where it is susceptible to the influence of external noise. An audio information ordering device characterized in that the output volume of the sound information is increased. (2) Feature #1- characterized in that the constituent body is a car, and the output volume of the sound output device is increased by the action of a door switch that is linked to when the door is opened.
The acoustic information generating device according to item 1 of the scope of IT requirements.