JPH056497A - Alarm device for automobile - Google Patents

Abstract

PURPOSE:To call driver's attention by demodulating a reception wave to generate a corresponding alarm tone in a vehicle at the time of receiving a radio signal from a guidepost or a running vehicle preceding his vehicle. CONSTITUTION:Alarm classifications 1-1 to 1-n (for right-turning, braking, one- way running, etc.,) are encoded by a code generator 2. A modulator 4 modulates the output of a harmonic oscillator 3 by the code of the code generator 2, and a harmonis signal is led to a transmission antenna 7 through a transmission controller 5 and an amplifier 6 only at the time of the presence of a transmission signal. The reception signal from a reception antenna 11 passes an ampplifier 14 and is demodulated a demodulator 15 and is classified to classifications of alarm by a decoder 16, and the alarm tone is generated in accordance with the classlfication of the code by an alarm tone generator 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alarm device for an automobile, which is installed in an automobile and a road sign in order to ensure the safety of the automobile traveling on a general road.

[0002]

2. Description of the Related Art At present, signs indicating traffic restrictions or instructions and changes in the operating condition of a vehicle are indicated by brake lights or turn signals (turn right, turn left, change course, drive slowly, stop, retreat, etc.). ) Are all defined to be visually recognized.

[0003]

Therefore, many kinds of road signs are installed along the road, and it becomes difficult to recognize all the road signs and the contents of the signal of the preceding vehicle while the car is running. . SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle alarm system capable of providing a driver with an alarm by hearing in order to make up for a defect such as a road sign only by sight or a signal of a preceding vehicle.

[0004]

The vehicle alarm system of the present invention uses a radio signal transmitted from a road sign installed on the ground or a vehicle traveling ahead, such as an electromagnetic wave, a light wave, or a volume wave caused by air vibration. When a signal is received, the received wave is demodulated and the acoustic equipment (bell,
The present invention is characterized in that an alarm sound corresponding to a code demodulated by a speaker or the like) is generated. In other words, in order to ensure the safety of automobiles running on general roads, road signs installed in the vicinity of the road or each of the automobiles are subject to regulations or instructions regarding road traffic displayed on the road signs. Alternatively, a transmitter is provided for continuously transmitting a wireless signal modulated by a code corresponding to a signal for notifying a change in driving state to the front of a running vehicle or to a following vehicle. Each of the automobiles is provided with a transmitting device for the road sign or a receiving device for receiving a wireless signal from the preceding vehicle to restore the code and generate a different audible signal sound alarm corresponding to the type of the code. It is characterized by that.

[0005]

1 is a perspective view of an embodiment to which the present invention is applied. In the figure, a preceding vehicle 22 traveling from the right to the left on a general road 21 emits a wireless signal 25 modulated with a code corresponding to the type of signal to a following vehicle 23. Further, a wireless signal 26 modulated with a code corresponding to the display of the road sign is continuously emitted from the transmitting device 27 mounted on the road sign 24 toward the front surface of the traveling automobile 23.

2 to 4 are circuit configuration diagrams of an apparatus showing a first embodiment of the present invention. The first embodiment uses electromagnetic waves as a wireless signal. Fig. 2 is an electrical block diagram of a transmitter installed in a car that sends out electromagnetic waves.
It In the figure, 1-1 to 1-n are input terminals of the code generator 2 to which a signal corresponding to the type of alarm (signal) (for example, right turn, left turn, braking, backward movement, etc.) is input.
When a driver wants to give a warning to a vehicle behind, it receives a signal from a control signal such as a braking lamp or the like, and receives a signal from a switch or the like by the driver's operation.
The code generator 2 generates a code (for example, a binary code) corresponding to the applied input signal. For example, if there are four types of signals, four types of codes can be configured by combining long and short signals. The code can also be configured by a combination of tone signals, as found in touch-tone telephones. The high-frequency oscillator 3 generates an original signal of an electromagnetic wave for transmitting a signal, and can use an arbitrary frequency. However, the communication distance is relatively short, and the antenna described later is downsized to facilitate directivity. Therefore, an oscillator having a frequency such as the UHF band or the SHF band is suitable. The modulator 4 modulates the output of the high frequency oscillator 3 with the code from the code generator 2 (for example, phase modulation).
Then, the output is guided to the transmitting antenna 7 via the amplifier 6 via the transmission controller 5 for transmitting the high frequency signal only when there is a transmission signal. The transmitting antenna 7 is a directional antenna, such as a dipole antenna with a reflector, which has a gentle directivity on both the horizontal plane and the vertical plane with respect to the rear direction of the automobile, and transmits a modulated high frequency signal only to the following automobile. To do.

FIG. 3 is an electrical block diagram of a transmitter installed on a road sign on the ground for transmitting electromagnetic waves. 1-1 to 1-
n is an input terminal to which a signal corresponding to the type of alarm (for example, under construction, lane change, accident handling, one-way traffic, etc.) is input, and the code generator 2 is a code corresponding to the added input signal ( For example, a binary code) is generated. The method of constructing the codes is the same as in the case of FIG. 2 described above. The modulator 4 modulates the output of the high-frequency oscillator 3 with the code (for example, phase modulation), and the output is guided to the transmitting antenna 7 via the amplifier 6. The transmitting antenna 7 is a directional antenna having a gradual directivity toward the front of an automobile running on the road, and sends out a modulated high frequency signal only to the automobile traveling toward the sign. In both cases of FIG. 2 and FIG. 3, it is also possible to directly modulate the frequency by using an oscillator capable of modulation, for example, a voltage controlled frequency variable oscillator (so-called VCO), instead of the combination of the oscillator 3 and the modulator 4. Is.

FIG. 4 is an electrical block diagram of a receiver installed in an automobile when electromagnetic waves are used. Receiving antenna 1
Reference numeral 1 is a directional antenna having a gentle directivity in front of the vehicle and having a polarization plane in the same direction as the transmitting antenna, and receives only the high frequency signal transmitted from the front of the vehicle. The received signal is amplified by the amplifier 14 and then demodulated by the demodulator 15 to obtain a code corresponding to the type of alarm. Although a receiver using a direct demodulation method is shown here, a single superheterodyne configuration or a dual superheterodyne configuration can be used depending on the frequency band used and the required selectivity. The code is 4 in the case where, for example, four kinds of codes are used as the signals classified by the decoder 16 into the types of alarms.
It is taken out as a signal output of the book, and this drives the alarm sound generator 17. The alarm sound generator 17 generates an electric signal of an alarm sound (for example, a combination of audio tones, a combination of intermittent sounds, a synthetic voice, etc.) according to the type of code, and a sound such as a speaker provided near the driver's seat. The device 18 provides an alarm sound to the driver.

5 to 6 are circuit configuration diagrams of an apparatus showing a second embodiment of the present invention. The second embodiment uses light as a wireless signal. FIG. 5 shows an electrical configuration of a transmission device installed on a vehicle or a road sign on the ground when light is used. The process of obtaining the code output by the code generator 2 from the alarm inputs 1-1 to 1-n is shown in FIG.
Is the same as. The light emitter (light emitting element) 8 generates a light beam in the infrared region for transmitting a signal, and an arbitrary wavelength can be used. The output current of the code generator 2 amplitude-modulates the output of the light emitter 8. The light emitter 8 has a gentle directivity toward the rear of the vehicle on both the horizontal and vertical planes. For example, a light emitting element combined with an optical lens or a parabolic mirror is used to emit light in the infrared region modulated only to the following vehicle. Send a signal. It is also possible to add a polarizing glass or the like in order to make a difference from the external light and use only the light having a specific polarization plane. The electrical configuration of the transmitter installed on the ground sign can be configured in the same manner, and the process of obtaining the code output by the code generator 2 from the alarm inputs 1-1 to 1-n is the same as in FIG. 2 or 3. Is. The light emitting element 8 is directed toward the front of the traveling vehicle, that is, in the direction opposite to the traveling direction,
A light emitting element in combination with an optical lens or a parabolic mirror, for example, is used to emit a modulated light signal in the infrared region only to the vehicle traveling toward the sign so that each of the vertical surfaces has a gentle directivity. .

FIG. 6 shows an electrical configuration of a receiver installed in a vehicle when light is used. The light receiving element 12 is a directional light receiving element that uses an optical system having a gentle directivity in front of the vehicle, and is an optical signal having the same polarization plane and the same wavelength as the light emitter 8 sent from the front of the vehicle. Only receive and convert to electrical signals. The process of symbols 14-18 for demodulating and decoding the received signal to generate an alarm sound is the same as that shown in FIG.

7 to 9 are circuit configuration diagrams of an apparatus showing a third embodiment of the present invention. The third embodiment uses a volume wave due to air vibration as a wireless signal.
FIG. 7 shows an electrical configuration of a transmitter installed in a vehicle when a volume wave caused by air vibration is used. Alarm input 1-1 to 1
The process of obtaining the code output from the code generator 2 from -n is the same as in FIG. 2 or FIG. The high-frequency oscillator 3 generates an original signal of ultrasonic air vibration for transmitting a signal, and an arbitrary frequency can be used, but the communication distance is made relatively short, and an electroacoustic transducer, an acoustoelectric transducer, which will be described later, are used. To reduce the size of the converter and make it easier to have directivity, 10
Ultra-audio oscillators above kHz are suitable. The modulator 4 modulates the output of the high frequency oscillator 3 (for example, phase modulation).
Then, the output is led to the electroacoustic transducer 9 via the transmission control circuit 5 for transmitting the high frequency signal only when there is a transmission signal, and via the amplifier 6. The electro-acoustic modulator 9 is a directivity converter such as a piezoelectric transducer with a horn, which has a gentle directivity on both the horizontal plane and the vertical plane with respect to the rear of the vehicle, and transmits an ultrasonic signal modulated only to the following vehicle. Send out.

FIG. 8 shows an electrical configuration of a transmitter installed on a sign on the ground when a volume wave by air vibration is used.
The process of obtaining the code output from the alarm inputs 1-1 to 1-n by the code generator 2 is the same as in FIG. 2 or FIG. The method of constructing the codes is the same as in the case of FIG. 2 described above. The modulator 4 modulates the output of the high frequency oscillator 3 (for example, phase modulation), and the output is guided to the electroacoustic transducer 9 via the amplifier 6. The electroacoustic transducer 9 has a gentle directivity toward the front of the vehicle traveling on the road, that is, in the direction opposite to the traveling direction, and modulates only the vehicle traveling toward the sign. The transmitted ultrasonic signal is transmitted. In both cases of FIG. 7 and FIG. 8, it is also possible to directly modulate the frequency by using an oscillator capable of modulation, for example, a voltage controlled frequency variable oscillator (so-called VCO), instead of the combination of the oscillator 3 and the modulator 4. is there.

FIG. 9 shows an electrical configuration of a receiver installed in a vehicle when a volume wave caused by air vibration is used. The acoustoelectric converter 13 has a gentle directivity in front of the vehicle,
The direction of the plane of polarization is the same as that of the electroacoustic transducer 9 described above, and only the ultrasonic signal sent from the front of the vehicle is received. Codes 14 to 18 for generating an alarm sound by demodulating and decoding the received signal
The process up to this is the same as that shown in FIG.

[0014]

[Effects of the Invention] It is possible to reduce the oversight by adding hearing to the attention of the driver, which has hitherto relied only on the visual sense, and to give an alarm when the attention is lowered due to the fatigue of the driver. Therefore, it is extremely effective in practical use.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment to which the present invention is applied.

FIG. 2 is a system diagram of a transmitting device provided in a vehicle when electromagnetic waves are used according to the first embodiment of the present invention.

FIG. 3 is a system diagram of a transmitter provided in a road sign when electromagnetic waves are used according to the first embodiment of the present invention.

FIG. 4 is a system diagram of a receiving device provided in an automobile when an electromagnetic wave is used according to the first embodiment of the present invention.

FIG. 5 is a system diagram of a transmitter according to a second embodiment of the present invention, which is provided in an automobile or a road sign when light is used.

[Fig. 6] Fig. 6 is a system diagram of a receiving device provided in an automobile when using light according to a second embodiment of the present invention.

FIG. 7 is a system diagram of a transmitting device provided in an automobile when a volume wave caused by air vibration is used according to a third embodiment of the present invention.

FIG. 8 is a system diagram of a transmitter provided in a road sign when a volume wave due to air vibration is used according to a third embodiment of the present invention.

[Fig. 9] Fig. 9 is a system diagram of a receiving device provided in an automobile when a volume wave due to air vibration is used according to a third embodiment of the present invention.

[Explanation of symbols]

1-1 to 1-n Alarm signal input terminal 2 Code generator 3 high frequency oscillator 4 modulator 5 Transmission controller 6 amplifier 7 transmitting antenna 8 light emitting elements 9 Electroacoustic modulator 11 receiving antenna 12 Light receiving element 13 acoustoelectric transducer 14 Amplifier 15 Demodulator 16 Decoder 17 Alarm sound generator 18 audio equipment 21 road 22,23 car 24 road signs 25,26 wireless signal 27 transmitter

Claims (9)

[Claims] 1. In order to ensure the safety of a vehicle traveling on a general road, each of the vehicles is provided with a radio signal modulated by a code corresponding to a signal for notifying a change of driving state to a succeeding vehicle. And a receiver for receiving a wireless signal from the preceding vehicle to restore the code and generate a different audible signal alarm corresponding to the type of the code. Characteristic automobile alarm device. 2. The alarm device for an automobile according to claim 1, wherein the wireless signal is an electromagnetic wave. 3. The vehicle alarm system according to claim 1, wherein the wireless signal is a light wave outside the visible range. 4. The vehicle alarm device according to claim 1, wherein the wireless signal is a volume wave caused by air vibration. 5. In order to ensure the safety of a vehicle traveling on a general road, each road sign installed on or near the road is regulated or instructed about road traffic displayed on the road sign. Is provided with a transmitter for continuously transmitting a wireless signal modulated by a code corresponding to the above to a front surface of a moving vehicle, and each of the vehicles receives a wireless signal from the transmitter of the road sign. An alarm device for an automobile, comprising: a receiving device which restores a code and generates an alarm of an audible signal sound that differs depending on the type of the code. 6. The vehicle alarm system according to claim 5, wherein the wireless signal is an electromagnetic wave. 7. The vehicle alarm system according to claim 5, wherein the wireless signal is a light wave outside the visible range. 8. The vehicle alarm system according to claim 5, wherein the wireless signal is a volume wave caused by air vibration. 9. The vehicle alarm device according to claim 1, wherein the audible signal of the receiving device provided in each of the automobiles is a synthetic voice signal.