JP2007320472A - Automobile warning sound producing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automobile warning sound producing device capable of emitting a warning sound with sound pressure only to pedestrians targeted for the warning sound. <P>SOLUTION: A plurality of speakers SP(A), SP(B), ..., SP(Z) are installed in a front part 10 of a vehicle. In this case, the same warning sound is reproduced from each of the speakers SP(A), SP(B), ..., SP(Z). However, time to emit the warning sound from each of the speakers SP(A), SP(B), ..., SP(Z) is controlled, such that phases of the same sound are superposed with respect to a pedestrian 11. Thus, the speaker SP(Z) (furthest from the target) starts reproduction with delay time zero. The speaker SP(A) starts reproduction after (D1-D2) time of delay time. The speaker SP(B) starts reproduction after D1 time of delay time. Therefore, when (D1+L) time has passed since start of the reproduction, warning sound of the same phase is emitted with respect to the target pedestrian 11, and the amplitude of the warning sound is intensified. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an automobile warning sound generating device that makes it possible to emit a warning sound having sound pressure only to a target pedestrian who wants to emit a warning sound.

  The demand for sound that alerts pedestrians that a car is approaching, that is, a warning sound (a sound that indicates the presence of a car, such as an engine sound), has been improved due to the evolution of the car drive unit. Is increasing.

  For this reason, conventionally, a warning sound is emitted from a single speaker installed outside the vehicle using an IC or a sound source system that stores pre-recorded sound.

  In this case, when the ambient noise level is high, it is necessary to generate a warning sound from a single sound source with a considerably strong sound pressure in order to make the pedestrian aware of it. In that case, it may be a noise to a person who has no direct influence. In addition, when a horn (warning sound) is sounded, it may be a noise for unrelated people. In addition, when there is noise or the like, there is a problem that it is difficult for the pedestrian to understand the direction of the warning sound.

In addition, there is a traffic accident prevention alarm device by flashing light and sound of the prior art (see Patent Document 1). This traffic accident prevention alarm device by flashing and sounding light is an alarm device that informs the surrounding people as soon as possible at the same time as an emergency stop operation. By operating this device, accidents can be avoided or minimized. The purpose is to hold on. For this purpose, the headlamps pass at the same time as a sudden stop, horns sound, hazard lights, fog lamps, small lamps, corner lamps, back lamps, number lamps, stop lamps, auxiliary stop lamps, etc. All the lights are flashing more than usual.
However, this prior art traffic accident prevention alarm device does not solve the problem that alarms such as horns cause noise for unrelated people.

  Moreover, there exists a pedestrian warning device of a prior art (refer patent document 2). This prior art pedestrian warning device is intended to reliably notify the driver of the location of a pedestrian. For this purpose, as shown in FIG. 8, the pedestrian detection unit 101 for detecting the position of the pedestrian and the irradiation unit 102 for irradiating the electromagnetic wave marker are provided. A color detection unit 121 that detects the color of the detected pedestrian, a color selection unit 122 that selects an irradiation color different from the color of the detected pedestrian, and an electromagnetic wave marker of the selected irradiation color are used as pedestrian detection means. And an irradiation control unit 123 that irradiates a pedestrian whose position is detected by 101.

However, this prior art pedestrian warning device is intended to allow a driver or the like to reliably recognize a pedestrian from the foreground regardless of the color of the pedestrian's clothing. It does not solve the problem of making noise to unrelated people when honking a horn.
JP 2001-58542 A JP 2005-222441 A

  As described above, conventionally, a warning sound is emitted from a single speaker installed outside the vehicle using an IC or a sound source system that stores pre-recorded sound. However, if the ambient noise level is high, it is necessary to generate a warning sound from a single sound source with a fairly strong sound pressure in order to make pedestrians aware of it. There was a problem of noise. In addition, when a horn is sounded, it causes noise for unrelated people, and if there is noise around the pedestrian, there is a problem that it is difficult for the pedestrian to understand the direction in which the warning sound is generated.

  The present invention has been made to solve such a problem, and an object of the present invention is to make it possible to emit a warning sound with sound pressure only for a target pedestrian who wants to emit a warning sound. The object is to provide a sound generator.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an automobile warning sound generator according to the present invention is provided with warning sound signal generating means for generating a warning sound signal and the warning sound installed toward the outside of a vehicle. Controls the time until sound is produced by the plurality of speakers so that the phases of the plurality of speakers that emit warning sounds based on the signals and the warning sounds emitted from the plurality of speakers with respect to external objects are aligned. And a control means.
The automobile warning sound generator according to the present invention generates a warning sound signal, and is installed toward the outside of the vehicle. The plurality of speakers emit a warning sound based on the warning sound signal, and external objects. Control means for controlling a delay time from when the warning sound signal is supplied to when the warning sound is generated for each of the plurality of speakers, so that the phases of the warning sounds emitted from the plurality of speakers are aligned. It is characterized by providing.
With such a configuration, a plurality of speakers are installed outside the automobile (for example, the front portion). Then, the same warning sound is generated from each sound source as a warning sound signal generating means to a plurality of speakers. Control means for designating a delay time of sound generation is provided for each speaker, and the control means The phase is controlled so that the phases of the warning sounds emitted from the plurality of speakers are aligned, and the warning sounds are concentrated on the pedestrian to be warned. In this manner, a warning sound having sound pressure is generated only for the target pedestrian who wishes to issue a warning.
Thereby, a warning sound with sound pressure can be emitted only to the target pedestrian who wishes to issue a warning. Moreover, it can reduce that a warning sound becomes a noise with respect to the person who is not directly related.

Further, the vehicle warning sound generator of the present invention is based on the pedestrian sensor for detecting the position of the pedestrian and the distance between each speaker and the pedestrian based on the position information of the pedestrian from the pedestrian sensor. And means for calculating a delay time amount produced by each speaker based on distance information between each speaker and a pedestrian.
With such a configuration, the position of the pedestrian is detected by the pedestrian sensor, the distance between each speaker and the pedestrian is calculated, and the amount of delay time that each speaker produces based on the distance information to this pedestrian Calculate Then, the sound generation delay time is designated for each speaker, the phase is controlled, and the sound is concentrated on the pedestrian to be warned.
Thereby, a warning sound with sound pressure can be emitted only to a pedestrian who wishes to issue a warning. Moreover, it can reduce that a warning sound becomes a noise with respect to the person who is not directly related.

Further, the vehicle warning sound generator according to the present invention is configured to determine the distance between each speaker and the pedestrian based on the means for the driver to specify the position of the pedestrian and the position information of the specified pedestrian. And a means for calculating and a means for calculating a delay time amount produced by each speaker based on distance information between each speaker and a pedestrian.
With such a configuration, an automobile driver or the like designates the position of the pedestrian. For example, virtual coordinates are provided around an automobile and one point of the coordinates is designated. For example, the position may be automatically calculated by copying the front coordinates on the monitor screen and designating one point on the monitor screen. In addition, for the position designation of the pedestrian, for example, a touch-panel type is used as the monitor screen, and the position of the pedestrian can be designated by the driver pressing the position of the pedestrian on the screen with a finger. .
Thereby, a driver | operator etc. specify easily the pedestrian who wants to emit a warning sound, and a warning sound with sound pressure can be emitted only with respect to the pedestrian who wants to issue a warning. Moreover, it can reduce that a warning sound becomes a noise with respect to the person who is not directly related.

In addition, when the pedestrian sensor detects a pedestrian, the automobile warning sound generator according to the present invention generates a sound generation trigger for instructing the sound source system to generate a sound and no pedestrian is detected. And a means for generating a mute trigger for instructing to stop the sound generation.
With such a configuration, when the pedestrian sensor detects a pedestrian, a sound generation trigger is generated for the sound source system, and a warning sound is generated from the sound source system. Then, when a pedestrian is no longer detected by the pedestrian sensor, a mute trigger is generated for the sound source system to stop the sounding of the warning sound.
As a result, sound generation trigger and mute trigger can be generated based on pedestrian detection information by pedestrian sensor, and automatic start and stop of sound generation of warning sound for pedestrian who wants to issue warning Can do.

The vehicle warning sound generator according to the present invention includes means for detecting a horn operation by a driver, means for generating a sound generation trigger when the horn operation is performed, and when the horn operation is stopped. And a means for generating a mute trigger.
With such a configuration, when a horn operation by the driver is detected, a sound generation trigger is generated for the sound source system, and a warning sound is generated from the sound source system. When the horn operation by the driver is stopped, a mute trigger is generated for the sound source system to stop the sounding of the warning sound.
Thereby, with respect to the pedestrian who wants to emit a warning sound, a warning sound can be pronounced by the driver's horn operation.

Further, in the automobile warning sound generating device of the present invention, the sound generation means always generates a warning sound at a low volume when the vehicle starts running, and generates a warning sound when a pedestrian is detected by the pedestrian sensor. The volume is increased and the volume of the warning sound is decreased when no pedestrian is detected.
With such a configuration, a warning sound is always generated at a low volume when the vehicle starts to travel, and when a pedestrian is detected by the pedestrian sensor, the volume of the warning sound is increased and sound generation is started. Then, when a pedestrian is no longer detected by the pedestrian sensor, the sounding is stopped by lowering the volume of the warning sound.
Thus, after the vehicle starts running, the volume of the warning sound is increased when a pedestrian is detected by the pedestrian sensor, and the warning sound is generated for the pedestrian who wants to emit the warning sound. it can. When no pedestrian is detected, the sound can be stopped by lowering the volume of the warning sound.

  In the present invention, a warning sound having sound pressure can be emitted only to a target pedestrian who wishes to issue a warning. Moreover, it can reduce that it becomes a noise with respect to the person to whom a warning sound does not relate directly. Furthermore, even if there is noise around the pedestrian, it becomes easier for the pedestrian to grasp the direction of the emitted warning sound.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

[Description of hardware configuration example of automobile warning sound generator]
FIG. 1 is a diagram illustrating a hardware configuration example of an automobile warning sound generator according to the present invention. In the automobile warning sound generator 1 shown in FIG. 1, the CPU 2 is a central processing unit. The ROM 3 is a memory in which software and the like necessary for realizing the functions of the vehicle warning sound generator are recorded, and the RAM 4 records data and the like necessary for executing processing in the vehicle warning sound generator. It is a memory for.

  The sound source system 5 is used to generate a warning sound, interprets data such as MIDI (Musical Instruments Digital Interface) in real time, and generates sound by the speaker 27. A CAN / IF (CAN interface) 6 is a connection interface with a vehicle-mounted CAN network (Controller Area Network) 7, and through this CAN / IF 6, pedestrian sensor 21 outputs pedestrian position information and the like to a vehicle warning sound generator. It is sent to 1.

  In the above configuration, the CPU 2 performs overall control of the entire vehicle warning sound generator 1. Further, the CPU 2 is used for controlling the time to start sound generation from each speaker 27 and calculating each speaker control information from the target position (the position of the pedestrian).

  As a mounting method of the sound source system 5, a software control method for executing software recorded in the ROM 3 by the CPU 2 as shown in FIG. 1 or a method using dedicated hardware may be used.

[Explanation of operation principle of car warning sound generator]
FIG. 2 is a diagram for explaining the operating principle of the automobile warning sound generator of the present invention. As shown in FIG. 2, a plurality of speakers SP (A), SP (B),... SP (Z) are installed in a line on the front portion 10 of the car. In this case, the same warning sound is reproduced from each speaker, but means for controlling the sounding time of the warning sound emitted from each speaker is provided so that the phase of the same sound overlaps with the target pedestrian 11. .

  In FIG. 2, the fixed delay L is a common time (fixed delay time) required for the warning sound to reach the pedestrian 11 from each speaker, which draws the equidistant circle A around the pedestrian 11. The delay time D1 is the time required for the warning sound to reach the equidistant circle A from the speaker SP (Z), and the delay time D2 is the time until the warning sound reaches the equidistant circle A from the speaker SP (A). It takes time to complete.

And in FIG. 2, the sound generation from each speaker with respect to the pedestrian 11 is controlled as follows.
The speaker SP (Z) (farthest from the target) starts reproduction with a delay time of zero.
The speaker SP (A) starts reproduction after the delay time (D1-D2) time.
The speaker SP (B) starts reproduction after the delay time D1 hours.

  Thereby, after the time (D1 + L) time from the start of the reproduction of the warning sound, the warning sound having the same phase is transmitted to the target pedestrian 11, and the amplitude is increased. Since the phase of the warning sound does not match at a position other than the target, the volume can be suppressed.

  In addition, while discovering a pedestrian, a pedestrian sensor for detecting the direction and distance (position of the pedestrian) of the pedestrian viewed from the own vehicle is provided, and the above calculation is performed with the pedestrian as a target. it can.

  Further, the driver may directly specify the position of the target (pedestrian). For example, virtual coordinates are provided around an automobile and one point of the coordinates is designated. For example, the position may be automatically calculated by copying the front coordinates on the monitor screen and designating one point on the monitor screen. In this case, the position of the pedestrian can be specified by using, for example, a touch panel type monitor screen, and the driver or the like pressing the position of the pedestrian on the screen with a finger.

  Moreover, although the example shown in FIG. 2 shows an example in which the speakers SP (A) to SP (Z) are arranged in a line in one column, they can be arranged in an array in a plurality of columns.

[Description of functional configuration example of automobile warning sound generator]
FIG. 3 is a diagram showing a functional configuration example of the automobile warning sound generator of the present invention. In FIG. 3, each of the plurality of speakers 27 includes a delay controller 25 and a D / A converter 26 for converting a digital signal into an analog signal. The delay controller 25 is a module that delays and outputs a signal by a given delay time with respect to the input digital signal (warning sound signal).

  The pedestrian sensor 21 is used for finding a pedestrian and detecting the position of the pedestrian. The distance measuring unit 22 is a processing unit for measuring the distance between each speaker 27 and the pedestrian based on the pedestrian position information from the pedestrian sensor 21. The controller 23 calculates the delay time amount generated by each speaker 27 based on the distance information between each speaker 27 and the pedestrian, and designates the delay time to each delay controller 25. When the sound source 24 receives a sound generation trigger (for example, MIDI data), the sound source 24 starts sound generation with a tone color, volume, and pitch designated in advance.

  Here, as the pedestrian sensor 21, for example, existing pedestrian detection means described in the prior art pedestrian alarm device (see Patent Document 1) shown in FIG. 8, an infrared camera, a laser sensor, or the like. Technology can be used.

  3 is realized by the hardware configuration of the automobile warning sound generating device shown in FIG. 1, for example, the distance shown in FIG. 3 by the CPU 2 shown in FIG. The functions of the measurement unit 22, the controller 23, and the like are realized, and the sound source system 5 shown in FIG. 1 realizes the functions of the sound source 24, the delay controller 25, the D / A converter 26, the speaker 27, and the like shown in FIG. .

[Explanation of sound generation of warning sound in car warning sound generator]
FIG. 4 is a flowchart showing a method for generating a warning sound. The vehicle warning sound generator shown in FIG. 3 generates a warning sound according to the following procedure.

  First, in accordance with a user instruction, a tone color, a volume, and a pitch for generating a warning sound from a sound source are set in advance (step S1).

  And a pedestrian and the position of a pedestrian are detected by the pedestrian sensor 21 (step S2). Then, it is determined whether or not a pedestrian has been detected (step S3). If no pedestrian has been detected, the process returns to step S2 and the position detection of the pedestrian by the pedestrian sensor 21 is started again.

  If it is determined in step S3 that a pedestrian has been detected, the distance measuring unit 22 calculates the distance between each speaker 27 and the pedestrian based on the position information of the pedestrian acquired by the pedestrian sensor 21. Measure (Step S4).

  And the controller 23 calculates the delay time amount which each speaker 27 produces | generates based on the distance information to each speaker 27 and a pedestrian, and designates delay time to each delay controller 25 (step S5).

  The user inputs a sound generation instruction when sounding a pedestrian (step S6). Then, it is determined whether or not a sound generation instruction has been input (step S7). If a sound generation instruction has not been input, the process returns to step S2, and the pedestrian sensor 21 starts detecting the position of the pedestrian again.

  If it is determined in step S 7 that a sound generation instruction has been input, a sound generation trigger is sent from the controller 23 to the sound source 24. When the sound source 24 receives the sound generation trigger, the sound source 24 starts sounding with the tone color, volume and pitch specified in advance (step S8).

  Then, each delay controller 25 outputs a signal delayed by the designated delay time (step S9). The output signal of the delay controller 25 is converted into an analog signal by the D / A converter 26, amplified by an amplifier, and sounded as a warning sound from each speaker 27 (step S10). When a mute instruction is input, a mute trigger is sent from the controller 23 to the sound source 24. When the sound source 24 receives the mute trigger, the sound source 24 finishes generating the warning sound (step S11).

[Explanation of alert sound by other methods]
In addition to the method shown in FIG. 4, for example, other sound generation methods as shown below can be used as the generation pattern of the sound generation trigger and the mute trigger.

  As a first example of another sound generation method, there is a method of generating a sound generation trigger when a pedestrian is found by the pedestrian sensor 21 and generating a mute trigger when no pedestrian is found.

  For example, FIG. 5 is a flowchart showing a first example of another sound generation method, and the automobile warning sound generator generates a warning sound according to the following procedure.

  First, in accordance with a user instruction, a tone color, a volume, and a pitch for generating a warning sound from a sound source are set in advance (step S21).

  And a pedestrian and the position of a pedestrian are detected by the pedestrian sensor 21 (step S22). Then, it is determined whether or not a pedestrian has been detected (step S23). When a pedestrian is not detected, it returns to step S22 and the position detection of the pedestrian by the pedestrian sensor 21 is started again.

  If it is determined in step S23 that a pedestrian has been detected, a sound generation trigger is generated (step S23). When the sound generation trigger is generated, the distance measuring unit 22 measures the distance between each speaker 27 and the pedestrian based on the position information of the pedestrian acquired by the pedestrian sensor 21 (step S25).

  And the controller 23 calculates the delay time amount which each speaker 27 produces based on the distance information to each speaker 27 and a pedestrian, and designates delay time to each delay controller 25 (step S26).

  Each delay controller 25 outputs a signal after being delayed by the designated delay time (step S27). The output signal of the delay controller 25 is converted into an analog signal by the D / A converter 26, amplified by an amplifier, and a warning sound is emitted from each speaker 27 (step S28).

  Then, in step S28, when sounding of the warning sound is started, pedestrians are detected again by the pedestrian sensor (step S29). If the detection of the pedestrian continues, the process returns to step S25, and the sounding of the warning sound is continued as it is.

  Eventually, if it is determined in step S29 that no pedestrian is detected, a mute trigger is generated and the sounding of the warning sound is stopped (step S30). Then, it returns to step S22 and the position detection of the pedestrian by the pedestrian sensor 21 is started again.

  According to the procedure described above, a sound generation trigger or a mute trigger is generated based on the detection information of the pedestrian by the pedestrian sensor 21 to automatically start and stop the sound generation of the warning sound for the pedestrian who wants to issue a warning. be able to.

  As a second example of another sound generation method, there is a method of generating a sound generation trigger when the driver intentionally sounds a horn and generating a mute trigger when separated from the horn.

  For example, FIG. 6 is a flowchart showing a second example of another sound generation method, and the automobile warning sound generator generates a warning sound according to the following procedure.

  First, in accordance with a user instruction, a tone color, a volume, and a pitch for generating a warning sound from a sound source are set in advance (step S41).

  And a pedestrian and the position of a pedestrian are detected by the pedestrian sensor 21 (step S42). Then, it is determined whether or not a pedestrian has been detected (step S43). When a pedestrian is not detected, it returns to step S42 and the position detection of the pedestrian by the pedestrian sensor 21 is started again.

  If it is determined in step S43 that a pedestrian has been detected, it is next determined whether or not a horn operation is performed (step S44). If a horn operation is not performed, the process returns to step S42. The position detection of the pedestrian by the pedestrian sensor 21 is started again.

  If it is determined in step S44 that a horn operation is being performed, a sound generation trigger is generated (step S45). When the sound generation trigger is generated, the distance measuring unit 22 measures the distance between each speaker 27 and the pedestrian based on the position information of the pedestrian acquired by the pedestrian sensor 21 (step S46).

  And the controller 23 calculates the delay time amount which each speaker 27 produces based on the distance information to each speaker 27 and a pedestrian, and designates delay time to each delay controller 25 (step S47).

  Then, each delay controller 25 outputs a signal delayed by the designated delay time (step S48). The output signal of the delay controller 25 is converted into an analog signal by the D / A converter 26, amplified by an amplifier, and a warning sound is emitted from each speaker 27 (step S49).

  Then, when sounding of the warning sound is started in step S49, it is determined again whether or not the horn operation is being performed (step S50). If the horn operation is continued, the process returns to step S46, and the sounding of the warning sound is continued as it is.

  Eventually, if it is determined in step S50 that the horn operation has been stopped, a mute trigger is generated, and the sounding of the warning sound is stopped (step S51). Then, it returns to step S42 and starts the position detection of the pedestrian by the pedestrian sensor 21 again.

  According to the procedure described above, it is possible to generate a warning sound for a pedestrian who wants to emit a warning sound by a driver's horn operation.

  As a third example of another sound generation method, when a car starts moving without generating a sound trigger, it always outputs a low volume warning sound as a sound generation mode, and shifts to the warning mode when a pedestrian is found. Then, the volume of the sound source may be increased, and when the pedestrian can no longer be found, the sound generation mode may be always returned to decrease the volume.

  For example, FIG. 7 is a flowchart showing a third example of another sound generation method, and the vehicle warning sound generator generates a warning sound according to the following procedure.

  First, in accordance with a user instruction, a tone color, a volume, and a pitch for generating a warning sound from a sound source are set in advance (step S61). And it is determined whether driving | running | working was started (step S61A). If the travel has not started, the determination of the travel start is continued. If it is determined that the vehicle has started running, the warning sound is always generated in the sound generation mode (step (S61B). That is, the warning sound is generated with a small volume. In this case, at least one speaker 27 is used. And pronounce it.

  And a pedestrian and the position of a pedestrian are detected by the pedestrian sensor 21 (step S62). Then, it is determined whether or not a pedestrian has been detected (step S63).

  If it is determined in step S63 that no pedestrian is detected, the normal sound generation mode is continued in step S68 and the process returns to step S62. When it is determined that a pedestrian has been detected, the mode shifts to a warning mode. In other words, the distance measuring unit 22 measures the distance between each speaker 27 and the pedestrian based on the pedestrian position information acquired by the pedestrian sensor 21 (step S64). And the controller 23 calculates the delay time amount which each speaker 27 produces based on the distance information to each speaker 27 and a pedestrian, and designates the delay time to each delay controller 25 (step S65).

  Then, each delay controller 25 outputs a signal delayed by the designated delay time (step S66). The output signal of the delay controller 25 is converted into an analog signal by the D / A converter 26. Then, the sound volume from each speaker 27 is increased and a warning sound is generated (step S67).

  Then, it returns to step S63 and starts the position detection of the pedestrian by the pedestrian sensor 21 again. And when it determines with a pedestrian being no longer detected, it transfers to normal sound generation mode. The sound volume from each speaker 27 is lowered. (Step S68). Then, it returns to step S62 and the position detection of the pedestrian by the pedestrian sensor 21 is started again.

  When the pedestrian sensor detects a pedestrian after the vehicle has started running according to the procedure described above, the volume of the warning sound is increased and the warning sound is pronounced for the pedestrian who wants to emit the warning sound. It can be carried out. Moreover, when a pedestrian is no longer detected, the volume of the warning sound can be lowered. Therefore, it is possible to always notify the presence of an automobile in the vicinity even if the automobile has a very low running sound, and if a pedestrian is detected, a warning sound with sound pressure can be immediately generated.

Although the embodiment of the present invention has been described above, the vehicle warning sound generator according to the present invention is not limited to the above illustrated example, and various modifications are made without departing from the gist of the present invention. Of course you get. For example, the sound source system 5 may interpret audio data and generate sound (human voice).
Further, the time until the warning sound is generated is controlled for each speaker by each delay controller 25, but the present invention is not limited to this. For example, each sound source is provided for each speaker. The time until the warning sound is generated may be controlled by the controller 23 so that the controller outputs a signal to each sound source.

  In the present invention, an effect that enables a warning sound having a sound pressure to be emitted to a target pedestrian who wants to emit a warning sound is produced. Therefore, the present invention is useful for an automobile warning sound generator and the like.

It is a figure which shows the structural example of the hardware of the motor vehicle alarm sound generation apparatus of this invention. It is a figure for demonstrating the principle of operation of the motor vehicle warning sound generator of this invention. It is a figure which shows the function structural example of the motor vehicle warning sound generator of this invention. It is a flowchart which shows the pronunciation method of a warning sound. It is a flowchart which shows the 1st example of the other pronunciation method. It is a flowchart which shows the 2nd example of another pronunciation method. It is a flowchart which shows the 3rd example of another pronunciation method. It is a figure which shows the example of the pedestrian warning device of a prior art.

Explanation of symbols

1 Car warning sound generator 2 CPU
3 ROM
4 RAM
5 Sound source system 6 CAN / IF
7 CAN Network 10 Front Part 11 Pedestrian SP (A) to SP (Z) Speaker 21 Pedestrian Sensor 22 Distance Measuring Unit 23 Controller 24 Sound Source 25 Delay Controller 26 D / A Converter 27 Speaker

Claims (7)

Warning sound signal generating means for generating a warning sound signal;
A plurality of speakers installed toward the outside of the vehicle and emitting a warning sound based on the warning sound signal;
Control means for controlling the time until sound is produced by the plurality of speakers so as to align the phases of the warning sounds emitted from the plurality of speakers with respect to an external object;
An automobile warning sound generator comprising: Warning sound signal generating means for generating a warning sound signal;
A plurality of speakers installed toward the outside of the vehicle and emitting a warning sound based on the warning sound signal;
A delay from when the warning sound signal is supplied to when the warning sound is generated for each of the plurality of speakers so as to align the phases of the warning sounds emitted from the plurality of speakers with respect to an external object. Control means for controlling time;
An automobile warning sound generator comprising: A pedestrian sensor for detecting the position of the pedestrian,
Based on the position information of the pedestrian from the pedestrian sensor, means for measuring the distance between each speaker and the pedestrian,
The vehicle warning sound generating device according to claim 2, further comprising means for calculating a delay time amount produced by each speaker based on distance information between each speaker and a pedestrian. Means for the driver to specify the position of the pedestrian,
Based on the position information of the designated pedestrian, means for calculating the distance between each speaker and the pedestrian,
The vehicle warning sound generating device according to claim 2, further comprising means for calculating a delay time amount produced by each speaker based on distance information between each speaker and a pedestrian. When a pedestrian is detected by the pedestrian sensor, a sound generation trigger for instructing sound generation to the sound source system is generated, and when a pedestrian is no longer detected, a mute trigger for instructing to stop sound generation is generated The vehicle warning sound generator according to claim 3, further comprising: means. Means for detecting the horn operation by the driver;
Means for generating a sound generation trigger when the horn operation is performed;
The vehicle warning sound generating device according to claim 3, further comprising: means for generating a mute trigger when the horn operation is stopped. The pronunciation means is:
When the car starts running, a warning sound is always generated at a low volume,
4. The vehicle warning sound generation according to claim 3, wherein the volume of the warning sound is increased when a pedestrian is detected by the pedestrian sensor, and the volume of the warning sound is decreased when no pedestrian is detected. apparatus.

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