JP2008163713A - Noise preventing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a noise preventing device capable of fulfilling a vehicle occupant's desire to listen to music with a window open or to enjoy conversation with the window open without annoying the surroundings with the sound made in a cabin. <P>SOLUTION: The noise preventing device 100 comprises a sound volume detecting means 10 detecting sound volume in the cabin, and an opening/closing part control means 13 controlling the opening of opening/closing parts 5, 6 partitioning the cabin interior from the cabin exterior based on the detected result of the sound volume detecting means 10. The noise preventing device 100 comprises an opening storage means 131 storing the opening of the opening/closing parts 5, 6, and the opening/closing control means 13 opens/closes the opening/closing parts according to the sound volume detected by the sound volume detecting means 10 while setting the opening stored by the opening storage means 131, as the allowable maximum opening. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a noise prevention device, and in particular, wants to listen to music while opening a window or enjoy conversation while opening a window, without disturbing the surroundings due to sound generated in the passenger compartment. The present invention relates to a vehicle window opening / closing device that can satisfy the desires of a vehicle passenger.

  2. Description of the Related Art Conventionally, there has been known a device that controls the volume of a speaker and the opening / closing of a window based on the vehicle position and the current time (see, for example, Patent Document 1).

This device automatically lowers the volume of the speaker and closes the window automatically when approaching a railroad crossing, so that the driver does not miss the warning sound of a railroad crossing, When approaching a place where noise should be taken into account, the volume of the speaker is automatically lowered to prevent the generation of noise.
JP 11-52959 A

  However, the device described in Patent Document 1 does not consider the effect of preventing sound generated in the vehicle interior from leaking outside the vehicle interior according to the opening of the window, and may recognize sound in the vehicle interior. Since the volume of the speaker is controlled based on the vehicle position and the current time, the speaker volume is automatically adjusted when approaching a place where noise should be taken into consideration even when the window is closed and there is no risk of sound leakage. Will cause the passenger to feel uncomfortable.

  In view of the above points, the present invention wants to listen to music while opening the window or enjoy conversation while opening the window, while preventing the surroundings from being disturbed by the sound generated in the passenger compartment. It is an object of the present invention to provide a noise prevention device that can satisfy the desires of a vehicle occupant.

  In order to achieve the above-described object, a noise prevention apparatus according to a first aspect of the present invention partitions a vehicle interior and a vehicle exterior based on a detection result of the volume detection means and a detection result of the volume detection means. An opening / closing part control means for controlling the opening degree of the opening / closing part is provided.

  Further, the second invention is a noise prevention device according to the first invention, comprising opening degree storage means for storing the opening degree of the opening / closing part, and the opening / closing part control means includes the opening degree storage means. The opening / closing part is opened / closed according to the sound volume detected by the sound volume detecting means while the stored opening is set as the allowable maximum opening.

  Further, the third invention is the noise prevention device according to the first or second invention, wherein the volume detection means detects the volume in the vehicle interior based on a set volume of the in-vehicle audio output device. And

  Further, a fourth invention is the noise prevention device according to the first or second invention, wherein the sound volume detecting means detects the sound volume in the vehicle interior based on a microphone installed in the vehicle interior. And

  A fifth aspect of the present invention is the noise prevention apparatus according to any one of the first to fourth aspects, further comprising a surrounding environment detecting unit that detects a surrounding environment of the vehicle, wherein the opening / closing part control unit includes the volume control unit. The opening degree of the opening / closing part is controlled based on the detection result of the detection means and the detection result of the surrounding environment detection means.

  According to a sixth aspect of the present invention, there is provided the noise prevention apparatus according to any one of the first to fifth aspects, wherein the open / close unit control means is configured to open and close the open / close based on a detection result of the sound volume detection means and a current time. The opening degree of the part is controlled.

  By the above-mentioned means, the present invention is a vehicle that wants to listen to music while opening the window or enjoy conversation while opening the window, while preventing the surroundings from being disturbed by the sound generated in the passenger compartment. It is possible to provide a noise prevention device that can satisfy a passenger's desire.

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

  The noise prevention device according to the present invention is a device that controls sound leaking from the vehicle interior to the exterior of the vehicle compartment via the opening / closing portion according to the environment around the vehicle.

  The “opening / closing part” is an in-vehicle device that can automatically open and close the vehicle interior and the exterior of the vehicle interior, and includes, for example, a window, a sunroof glass, a roadster, a cabriolet top, and the like.

  FIG. 1 is a block diagram illustrating a configuration example of a noise prevention device according to the present invention. A noise prevention device 100 includes a control unit 1, and the control unit 1 includes a microphone 2, a GPS (Global Positioning System) 3, and a control unit 1. Sound that leaks outside the vehicle by acquiring data from the storage device 4 and detecting the environment around the vehicle and the volume of sound generated in the vehicle interior and outputting control signals to the power window 5, sunroof 6, and in-vehicle speaker 7. To control.

  The control unit 1 is a computer including a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), an NVRAM (Non-Volatile Random Access Memory), and the like. Programs corresponding to each of the specifying unit 11, the surrounding environment detection unit 12, the opening / closing unit control unit 13, and the volume control unit 14 are stored in the NVRAM, and these programs are expanded on the RAM to cause the CPU to execute corresponding processing.

  The microphone 2 is a device for acquiring sound information in the vehicle interior. For example, the microphone 2 is installed in the center of the ceiling of the vehicle interior, and detects sounds output from the in-vehicle speaker 7 and conversations of vehicle passengers in the vehicle interior. The detected sound information (referred to as volume, frequency, etc.) is output to the control unit 1.

  The GPS 3 is a device for acquiring vehicle position information, and is composed of, for example, vehicle position information (for example, latitude, longitude, and altitude) based on a GPS signal output from a GPS satellite via a GPS antenna. ) And outputs the acquired position information to the control unit 1. The positioning method using GPS 3 may be any method such as single positioning or relative positioning (including interference positioning), but preferably relative positioning with high accuracy is used.

  In addition, the GPS 3 may correct position information based on outputs of various sensors such as a steering angle sensor, a vehicle speed sensor, a gyro sensor, and the like, and various information received via a beacon receiver and an FM multiplex receiver. Good.

  The storage device 4 is a device for storing various types of information required by the noise prevention device 100. For example, the storage device 4 is a storage medium such as a hard disk or a flash memory, and a map information database 40 that systematically stores map information, A noise permissible level map 41 that defines a permissible noise level for each area, a permissible noise level, and a per-area opening map 42 that defines the control contents of the opening / closing unit according to the sound information acquired by the microphone 2 are stored.

  The storage device 4 outputs various information to the control unit 1 in response to an inquiry from the control unit 1. In addition, the setting content in the noise permissible level map 41 and the opening map 42 by area is stored so as to be changeable via an input means such as a touch panel or an escutcheon switch.

  The power window 5 and the sunroof 6 are vehicle-mounted devices that open and close the window or sunroof glass with a driving device such as an electric motor or actuator, respectively, and open / close buttons installed at predetermined positions in the vehicle interior such as an instrument panel and a door inner wall. The window or the sunroof glass is opened and closed according to the output signal or the control signal output from the control unit 1.

  The in-vehicle speaker 7 is an in-vehicle audio output device for outputting sound, and outputs audio data such as a hands-free mobile phone, an in-vehicle AV (Audio-Visual) device, or a car navigation system.

  Note that the volume of the in-vehicle speaker 7 is controlled through an input button such as an operation button installed at a predetermined position in the vehicle interior, a touch panel or an escutcheon switch in the car navigation system.

  Next, various units included in the control unit 1 will be described.

  The sound volume detection means 10 is a means for detecting the sound volume generated in the vehicle interior. For example, whether the sound volume generated in the vehicle interior based on the sound information acquired by the microphone 2 is greater than or equal to a predetermined value. It is determined whether or not the volume level (dB (decibel)) is detected. In this case, the volume detection means 10 also detects a volume other than the in-vehicle audio output device such as the in-vehicle speaker 7 (for example, a voice of a vehicle occupant, a sound output by a portable audio output device such as a portable music player). can do.

  Further, the sound volume detection means 10 may detect the sound volume in the vehicle interior based on the set sound volume in the in-vehicle audio output device such as the in-vehicle speaker 7. In this case, the volume of the sound actually generated in the passenger compartment cannot be detected, but the volume can be detected without using the microphone 2, so that the configuration of the noise prevention apparatus 100 can be simplified.

  The sound volume detection means 10 stores sound information acquired by the microphone 2 in a RAM for a predetermined time, calculates an average value, an intermediate value, a maximum value, etc. of the sound volume for a predetermined time, and calculates the calculated values in the passenger compartment. The volume of the generated sound may be set. This is to cope with a case where the volume of sound generated in the passenger compartment changes in small increments.

  The vehicle position specifying means 11 is means for specifying the position of the vehicle on the map. For example, based on the position information acquired by the GPS 3 and the map information in the map information database 40 stored in the storage device 4. The position of the vehicle on the map is specified, so that it can be determined which district the vehicle is traveling.

  The surrounding environment detection means 12 is a means for detecting the surrounding environment of the vehicle. For example, based on the vehicle position on the map specified by the vehicle position specifying means 11, the surrounding environment of the vehicle is an industrial zone, a downtown area, an airport. It is detected whether it is a surrounding area, a residential area, an office area, a hospital area, or a school area.

  The surrounding environment detection means 12 may detect the surrounding environment of the vehicle according to the direction. For example, the surrounding environment of the vehicle is such that the right side of the vehicle is a residential area and the left side of the vehicle is a downtown area. Is detected.

  The opening / closing part control means 13 is a means for controlling the driving of the opening / closing part, and for example, transmits control signals to the power window 5 and the sunroof 6 to control their opening degrees. The opening degree of the opening / closing part is expressed by, for example, the ratio of the area of the open part to the entire area of the opening / closing part, the opening degree 100% represents the fully open state, the opening degree 50% represents the half open state, and the opening degree 0% represents a fully closed state.

  FIG. 2 is a block diagram showing a configuration example of the opening / closing part control means 13. The opening / closing part control means 13 includes an opening degree acquisition means 130, an opening degree storage means 131, an opening degree judgment means 132, and an opening degree adjustment means 133. Composed.

  The opening degree obtaining means 130 is means for obtaining information on the opening degree of each opening / closing section at the present time (hereinafter referred to as “opening information”). For example, the opening degree information is obtained from the power window 5 and the sunroof 6. Periodically obtained to obtain the opening of each opening / closing part.

  The opening degree obtaining means 130 refers to a driving state (referred to as an applied voltage or a motor rotation angle) of an electric motor or actuator that drives each opening / closing portion or a frame portion (a portion where a movable portion such as glass contacts). The opening degree of the opening / closing part is derived based on the opening degree information such as the output of the contact sensor or the like installed in (1).

  The opening degree storage means 131 is a means for storing the opening degree information acquired by the opening degree acquisition means 130 in the storage device 4 or the RAM. For example, the driver operates a window operation button installed near the driver's seat door. When the window is opened by half (opening degree 50%), the opening degree 50% is stored as the opening degree desired by the driver.

  The opening degree determination means 132 is a means for determining whether or not the opening degree of each opening / closing part at the present time is appropriate from the viewpoint of noise prevention. Suitability is determined by comparing the opening and the allowable opening set in the opening map 42 for each district.

  FIG. 3 is a diagram showing a configuration example of the noise tolerance level map 41, in which the noise tolerance level 1 is associated with “industrial zone”, “business district”, and “airport area”, and the noise tolerance level 2 is indicated with “residential city”. ”And“ Office Town ”, and“ Noise Allowance Level 3 ”are associated with“ Hospital Perimeter ”and“ School Perimeter ”, respectively.

  FIG. 4 is a diagram showing a configuration example of the opening map 42 according to district. For example, when the surrounding environment of the vehicle is an allowable noise level 1, the volume in the vehicle compartment detected by the volume detection means 10 is the allowable volume level. If it is (130 dB) or more, the control content which restrict | limits the opening degree of each opening-and-closing part to 50% of allowable opening degree (it says a half open state) is shown.

  Further, FIG. 4 shows that when the surrounding environment of the vehicle is at a noise allowable level 1, the control content for limiting the opening degree of each opening / closing portion to 0% (which means a fully closed state) is not set. 10 indicates that the opening degree of each opening / closing part is not limited to 0% regardless of the level of the detected volume in the vehicle interior (meaning that the vehicle is not forcibly fully closed).

  Further, FIG. 4 shows that when the surrounding environment of the vehicle is an allowable noise level 2 and the volume of the vehicle interior detected by the volume detection means 10 is 100 dB or more, the opening degree of each opening / closing section is 50% (a half-open state). .) And 130 dB or more indicates that the opening degree of each opening / closing part is limited to 0% (refers to a fully closed state). Although the set values are different, the same applies to the case where the surrounding environment of the vehicle is the allowable noise level 3.

  The opening degree determination unit 132 refers to the noise permissible level map 41, acquires a noise permissible level corresponding to the surrounding environment of the vehicle detected by the surrounding environment detection unit 12, and further refers to the district-specific opening degree map 42. Then, the permissible opening degree of each opening / closing part corresponding to the acquired noise permissible level and the volume of the vehicle interior detected by the sound volume detecting means 10 is acquired, and it is determined whether or not the opening degree of each opening / closing part at the present time is appropriate To do.

  The opening degree determination means 132 may determine whether or not the opening degree of each opening / closing part at the present time is appropriate based on the volume in the vehicle compartment detected by the volume detection means 10 regardless of the vehicle position. Good.

  In this case, the allowable noise level as a criterion may be set based on the time (for example, the allowable noise level is set for each time zone such as early morning, night, daytime, etc.), and external noise (for example, outside the vehicle) Based on external noise detected on the basis of a sound collecting device installed in the vehicle), weather (for example, based on the presence or absence of elements that drown out sounds such as rainfall and wind intensity), or traveling speed ( For example, the higher the traveling speed, the shorter the time required to pass through one point, so that the allowable noise level is alleviated.

  The opening degree adjusting means 133 is a means for adjusting the opening degree of the opening / closing section. For example, when the opening degree determining means 132 determines that the opening degree of each opening / closing section is not appropriate, the driving device for each opening / closing section A control signal is transmitted to the control unit to adjust the opening degree so that the opening degree of each opening / closing part becomes appropriate.

  For example, when the opening degree of each opening / closing part at the present time stored in the opening degree storage means 131 exceeds the allowable opening degree set in the opening map for each area, the opening degree adjusting means 133 determines the opening degree of each opening / closing part. The opening degree of each opening / closing part is reduced so as to be an allowable opening degree.

  After that, the vehicle moves and the surrounding environment of the vehicle changes, and the opening degree of each opening / closing part adjusted by the opening degree adjusting means 133 is an allowable opening corresponding to the new surrounding environment set in the opening map 42 for each district. When the angle is less than the degree, the opening degree adjusting means 133 is the opening degree that the opening degree of each opening / closing part is stored in the opening degree storage means 131 (for example, a desired opening degree adjusted by the driver using the window operation button). ) Or the opening of each open / close section is increased so that the opening of the larger allowable opening corresponding to the new surrounding environment is obtained.

  Moreover, the opening degree adjusting means 133 may not only adjust the opening degree of each opening / closing part uniformly, but also adjust it individually (in this case, the allowable opening degree of each opening / closing part is an opening map for each area). 42), the opening degree of each opening / closing part may be adjusted for each direction according to the surrounding environment of the vehicle.

  For example, the opening degree adjusting means 133 is configured such that when there is a hospital (noise allowable level 3) on the right side of the vehicle and the left side of the vehicle is a downtown area (noise allowable level 1), the opening degree of the window on the right side of the vehicle and the vehicle Adjust the opening of the window on the left side separately.

  The volume control means 14 is a means for controlling the volume of controllable sound generated in the passenger compartment. For example, the volume control means 14 transmits a control signal to the in-vehicle speaker 7 to forcibly increase or decrease the volume of the in-vehicle speaker 7.

  Next, the flow of processing (hereinafter referred to as “opening adjustment processing”) in which the noise prevention apparatus 100 adjusts the opening degree of the opening / closing part will be described. FIG. 5 is a flowchart showing the flow of the opening degree adjusting process.

  First, the noise prevention apparatus 100 specifies the vehicle position on the map based on the position information acquired by the GPS 3 by the vehicle position specifying means 11 and the map information database 40 (step S1).

  Thereafter, the noise prevention apparatus 100 detects the surrounding environment of the vehicle by the surrounding environment detection means 12, and determines whether or not the vehicle is traveling in a residential area (step S2).

  When it is determined that the vehicle is traveling in a residential area (YES in step S2), the noise prevention apparatus 100 detects the volume in the vehicle interior by the volume detection means 10 (step S3), and displays the opening map 42 for each district. With reference to this, it is determined whether or not the detected volume exceeds an allowable volume level (for example, 100 dB) set in association with the residential area (noise allowable level 2) (step S4).

  When the detected volume is equal to or lower than the allowable volume level (NO in step S4), the noise prevention apparatus 100 determines that the surrounding environment is not disturbed by the sound generated in the passenger compartment and ends the opening adjustment process. .

  If the detected volume exceeds the allowable volume level (YES in step S4), the noise prevention apparatus 100 acquires the opening of the window by the opening acquisition means 130 (step S5), and the opening determination means 132 acquires the window opening. It is determined whether or not the opening degree exceeds an allowable opening degree (for example, 50%) with respect to an allowable sound volume level set in association with the residential area (step S6).

  When the opening degree of the window is equal to or smaller than the allowable opening degree (NO in step S6), the noise prevention apparatus 100 determines that the surrounding environment is not disturbed by the sound generated in the passenger compartment and ends the opening degree adjusting process. Let

  When the opening degree of the window exceeds the allowable opening degree (YES in step S6), the noise prevention apparatus 100 transmits a control signal to the driving device of the power window 5 by the opening degree adjusting means 133 to raise the window. The opening is reduced to an allowable opening (step S7).

  If it is determined that the vehicle is traveling outside the residential area (NO in step S2), the noise prevention apparatus 100 temporarily ends the opening degree adjustment process, but the vehicle passes through the industrial zone, the hospital area, or the downtown area. You may make it determine whether it is drive | working and perform the process of step S3 thru | or step S7.

  With the above configuration, the noise prevention apparatus 100 automatically adjusts the opening degree of the opening / closing part based on the volume of the sound generated in the passenger compartment, so that the driver does not manually operate the opening degree of the opening / closing part. It is possible to prevent the surrounding environment from being disturbed by the sound generated in the passenger compartment.

  Further, the noise prevention device 100 automatically adjusts the opening degree of the opening and closing unit based on the surrounding environment of the vehicle and the volume of the sound generated in the passenger compartment, and realizes the optimum opening degree according to the surrounding environment. It is possible to satisfy the vehicle passenger's desire to listen to music while opening the window or enjoy conversation while opening the window, while avoiding trouble to the surrounding environment.

  Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the present invention. Can be added.

  For example, in the above-described embodiment, the noise prevention apparatus 100 adjusts the opening degree of the opening / closing unit without limiting the volume of sound (such as audio output or conversational sound) generated in the passenger compartment. Noise damage caused by sound generated in the room is prevented, but the volume control means 14 automatically reduces the volume of the in-vehicle speaker 7 or outputs a warning message from the in-vehicle speaker 7 to suppress the voice of conversation. Therefore, priority may be given to maintaining the opening of the window.

  Further, the noise prevention apparatus 100 determines an allowable volume level based on the opening degree of each opening / closing part adjusted by a vehicle occupant via an operation button or the like, and the volume in the vehicle interior detected by the volume detection means 10 is an allowable volume. When the level exceeds the level, the volume control means 14 automatically reduces the volume of the in-vehicle speaker 7 or outputs a caution message from the in-vehicle speaker 7 to suppress the voice of conversation. The volume of the sound may be equal to or lower than the allowable volume level.

It is a block diagram which shows the structural example of the noise prevention apparatus which concerns on this invention. It is a block diagram which shows the structural example of an opening-and-closing part control means. It is a figure which shows the structural example of a noise permissible level map. It is a figure which shows the structural example of the opening map classified by area. It is a flowchart which shows the flow of an opening degree adjustment process.

Explanation of symbols

1 Control unit 2 Microphone 3 GPS
DESCRIPTION OF SYMBOLS 4 Memory | storage device 5 Power window 6 Sunroof 7 Car-mounted speaker 10 Sound volume detection means 11 Vehicle position specification means 12 Surrounding environment detection means 13 Opening / closing part control means 14 Volume control means 40 Map information database 41 Noise allowable level map 42 Opening map according to area 130 Opening acquisition means 131 Opening storage means 132 Opening determination means 133 Opening adjustment means

Claims (6)

Volume detection means for detecting the volume in the passenger compartment;
Opening / closing part control means for controlling the opening degree of the opening / closing part that partitions the vehicle interior and the exterior of the vehicle interior based on the detection result of the volume detection means;
A noise prevention apparatus comprising: Opening degree storage means for storing the opening degree of the opening and closing unit;
The opening / closing part control means opens and closes the opening / closing part according to the sound volume detected by the sound volume detecting means while setting the opening degree memorized by the opening degree memory means as an allowable maximum opening degree.
The noise prevention apparatus according to claim 1. The volume detection means detects the volume in the passenger compartment based on the set volume of the in-vehicle audio output device.
The noise prevention apparatus according to claim 1 or 2, characterized in that The volume detection means detects a volume in the vehicle interior based on a microphone installed in the vehicle interior.
The noise prevention apparatus according to claim 1 or 2, characterized in that It has a surrounding environment detection means for detecting the surrounding environment of the vehicle,
The opening / closing part control means controls the opening degree of the opening / closing part based on the detection result of the volume detection means and the detection result of the surrounding environment detection means,
The noise prevention device according to any one of claims 1 to 4, wherein The opening / closing part control means controls the opening degree of the opening / closing part based on the detection result of the volume detection means and the current time.
The noise prevention device according to any one of claims 1 to 5, wherein

Images