JPS604442A - Verbal alarm for vehicle - Google Patents

Abstract

PURPOSE:To improve utility by making noticing of an alarm reliable, by magnifying sound pressure of an alarming sound according to a door switch which is turned ON through an opening of the door, in an alarm performing various alarms verbally to a rider of a vehicle. CONSTITUTION:As a key switch 2 is kept ON as it is and a door switch 7 is turned ON when a door is opened without pulling out a key by a rider, abnormal operation such as forgethfulness in pulling out the key is detected by a control circuit 1, in an alarm of the forgetfulness in pulling out the key. With this construction, the detected signal is applied to an input part 8a of a voice synthesizing circuit 8 and a predetermined verbal signal is put out from an output part 8b of the voice synthesizing circuit 8. At this time, a transistor T1 in the inside of a bias variable circuit 9 is turned OFF by a current from a D.C. power source 4 and a bias level of the variable circuit 9 becomes high. A large alarm sound, therefore, is uttered by a vocal device 11. On the one hand, when various alarms are performed at the time of closure of the door, the bias level of a variable circuit 9 is low and a small alarm sound is uttered.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an audio warning device for giving audible warnings to vehicle occupants, and relates to a vehicle audio warning device that varies sound pressure according to opening and closing of a door.

2. Description of the Related Art Hitherto, as a device for issuing various warnings to the occupants of this type of vehicle, an audio warning device is known that accurately notifies the occupants of the contents of the warning by voice.

In particular, it is known that a warning is issued when the occupant leaves the vehicle, such as a warning for forgetting to remove the key or a warning for forgetting to turn off the light, which is given by opening the door.

However, in places where there is a lot of noise outside the vehicle, there is a risk that the notification sound from the voice warning device will be interfered with by the noise and will not be transmitted to the occupants.

The present invention has been made in view of the above, and it is an object of the present invention to provide a vehicle audio warning device with a simple configuration that increases the sound pressure of a notification sound in accordance with a door switch that is turned ON when a door is opened. purpose.

Hereinafter, preferred embodiments of the present invention will be described based on the accompanying drawings.

1 is a control circuit, and a first input section 1a of the control circuit 1
is connected to the DC power source 4 via the key switch 2, and the second input section 1b is connected to the DC power source 4 via the lighting switch 3.The third input section 1C of the control circuit 1 is connected to the vehicle speed switch 5 via the vehicle speed switch 5. Furthermore, the fourth input section 1d is grounded via the parking switch 6, and the fifth input section 1e is grounded via the door switch 7.

8 is a speech synthesis circuit, and an input section 8 of the speech synthesis circuit 8
a is connected to the output part 1f of the control circuit 1, and the output part 8
b is connected to the first input section 9a of the variable bias circuit 9.

The second input section 9b of the variable bias circuit 9 is connected to the input section 1θ of the control circuit 1 @5. Further, the output section 9C of the bias variable circuit 9 is connected to the input section I of the amplifier 10.
The output section IQb of the amplifier 10 is connected to the sound generating device 11.

Furthermore, the output section 12bll-j of the constant voltage circuit 12, the power supply section 8C of the voice synthesis circuit 8, and the bias variable circuit 9
and the power supply section 10C of the amplifier 10, respectively. In addition, the input section 1 of the constant voltage circuit 12
2a is connected to the DC power supply 4 and the power supply section 1g of the control circuit 1, respectively. Moreover, the resistor 13 is connected to the DC power supply 4
and the fifth input section 10 of the control circuit 1.

FIG. 2 is an electric circuit diagram showing a preferred actual example of the variable bias circuit 9, in which the first input section 9a and the output section 9C are connected via a capacitor C8, and the first input section 9a is connected to the resistor R1. The output section 9C is grounded through a resistor R4, and the output section 9C and the power supply section 9d are connected through a resistor R2. The second input part 9b is grounded via a resistor R6 and a resistor R0, the base of a transistor T1 is connected to the connection point between the resistors R3 and R6, the emitter of the transistor T is grounded, and the collector is connected to a resistor R
3 to the output section 9C.

Next, the operation of the vehicle audio warning device according to the present invention having the above configuration will be explained in detail.

The vehicle audio warning device of the present invention can be used for various types of warnings, and as an example, the operation will be described in the case where a key removal warning is issued.

First of all, to explain the main function of the bias variable circuit 9, the bias variable circuit 9 is an electric circuit for setting the bias level for amplifying the audio signal from the speech synthesis circuit 8 with the amplifier 1a. Yes, when the bias level is low, the level of the audio signal output from the output section 1[]b of the amplifier 1a is low, so the notification sound emitted by the sound generating device 11 is low, and conversely, when the bias level is high, The notification sound will become louder.

Note that the bias level here refers to the output voltage level of the output section 9C when no audio signal is input from the speech synthesis circuit 8 to the first input section 9a of the variable bias circuit 9.

Hereinafter, the operation of the device of the present invention will be described for each of the cases in which the occupant opens the door without pulling out the vehicle key, in the case in which the occupant opens the door by pulling out the key, and in the case in which other alarms are issued when the door is closed. Explain.

First, if the occupant opens the vehicle door without pulling out the key, the key switch 2 remains ON and the door switch 7 operates ○N, so the control circuit 1 detects the abnormal operation of "forgetting to remove the key". To detect.

Then, a signal is inputted from the control circuit 1 to the voice synthesis circuit 8 to output the voice signal "I forgot to remove the key AJ,"
A voice signal of "forgot to remove the key" is derived from the output section 8b of the voice synthesis circuit 8.

"Forgot to remove the key" from the output section 8b of the speech synthesis circuit 8
When the audio signal is derived, the door switch 7 is turned on, and the bias level from the DC power supply 4 and the variable bias circuit 9 becomes high. Therefore, the level of the audio signal outputted from the output section IQb of the amplifier 10 is high, and the "forgot to remove the key" notification sound emitted by the sound generating device 11 becomes louder.

Next, when the occupant pulls out the vehicle key and opens the door, even if the door switch 7 is turned ON and the bias variable circuit 9 is activated to increase the bias level, the voice synthesis circuit 8 by the control circuit 1 There is no derivation of an audio signal and no alarm is issued.

Furthermore, if you want to issue a type of alarm that occurs when the door is closed regardless of whether the key is inserted or removed, the door switch 7 is turned off when the door is closed, and the bias is variable from the DC power source 4 through the resistor 13. Second input 9b of circuit 9
A current is supplied to transistors T and QN, and the bias level by the variable bias circuit 9 is lowered. Therefore, the level of the audio signal output from the output section 1[1b of the amplifier 10 is low, and the notification sound emitted by the sound generating device 11 is small.

The vehicle audio alarm system of the present invention emits a small sound when the vehicle door is closed, and a loud sound when the door is opened.

Here, the setting value of the bias level of the bias variable circuit 9 is determined as follows.

First, when the transistor T is OFF and the sound generator 11 is operated at a bias level obtained by dividing the voltage applied to the power supply section 9d by the resistors R2 and R4, the vehicle is parked in a place where there is a lot of noise. The ratio of resistors R2 and R4 is set so that the sound pressure increases to a level where the notification sound can be heard even when the occupant opens the door.

Next, when the transistor T is ON, the bias level when the resistor R3 is connected in parallel to the previously determined resistor R4 is:
The value of the resistor R3 is set according to the above-mentioned resistors R2 and R4 so that the sound pressure is reduced to the extent that the notification sound can be heard sufficiently when the occupant closes the door and boards the vehicle.

In addition, in addition to the "forgotten key removed alarm" described above, the bias level is set to high < I, -c according to the present invention.In addition to the "forgotten key removed alarm", for example, a lighting switch that lights up a small lamp, etc., is left in the ON position. ``Forgetting to turn off the light warning J'' to prevent battery over-discharge caused by parking
There is also an "anti-theft alarm". In addition, the so-called "safety" system, which lowers the bias level and gives a low-pitched sound alarm, is used to warn of burnout of vehicle lamps, brake oil, and f7 phosphorus remaining amount.

There are ``warning'' and ``parking warning'' to prevent you from driving without forgetting to release the parking brake.

Furthermore, according to the present invention, it is possible to change the bias level not only by a door switch but also by a switch that responds to the opening and closing of a vehicle window, and it goes without saying that the sound pressure of a warning by a sound other than voice can be changed.

The vehicle audio warning device having the above structure and operation has the following effects.

(b) A warning issued when a vehicle door is opened can be transmitted to the occupants with a loud sound without being disturbed by noise outside the vehicle, and a warning issued when the door is closed can be transmitted with a low volume sound.

(a) It is sufficient to simply add a variable bias path with a simple structure to a conventional voice warning device.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a vehicle audio visual information device according to the present invention. FIG. 2 is an electrical circuit diagram showing a preferred embodiment of the variable bias circuit of FIG. 4...DC power supply, 2...Key switch, 3...Lighting switch, 5...
・Vehicle speed switch. 6... Parking switch, 7... Door switch. 1... Control circuit, 12... Constant voltage circuit, 8... Voice synthesis circuit, 9... Variable bias circuit, 10... Amplifier, 11...
・Sounding device. Above -11-

Claims (1)

[Claims] A control circuit that outputs an output to a voice synthesis circuit according to the opening/closing mode of each switch of the vehicle, a voice synthesis circuit connected to the output side of the control circuit, and a voice synthesis circuit connected to the output side of the voice synthesis circuit and used to open and close the door. A vehicle comprising: a variable bias circuit that varies the bias value of an amplifier according to the variable bias; an amplifier connected to the output side of the variable bias circuit; and a sound generating device connected to the output side of the amplifier. Audio alarm device.