JP2017213940A - Noise suppression amount adjustment device, noise suppression amount adjustment system, and noise suppression amount adjustment program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an occupant be aware of transfer of a driving authority from automatic driving control to manual driving without complicating a device configuration and without making the occupant feel uncomfortable.SOLUTION: A noise suppression amount adjusting device includes: a driving control information acquisition section 101 for acquiring information indicating a state of driving control of a vehicle; a switching determination section 102 for referring to the information indicating the state of the driving control of the vehicle and determining whether the driving of the vehicle is switched from automatic driving control to occupant manual driving; and a suppression amount determination section 103 for reducing suppression amount of vehicle interior noise when a determination that the driving of the vehicle is switched from the automatic driving control to the occupant manual driving is made.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for adjusting the amount of suppression of vehicle interior noise.

  When switching from automatic driving control to manual driving in vehicles capable of automatic driving control, it is necessary to notify the driver that driving authority will be delegated in advance and to smoothly transfer driving authority. There is. On the other hand, with the improvement of the technology of automatic driving control, the driver of the vehicle for which the automatic driving control is performed becomes more relaxed than the case of driving the vehicle manually, It is presumed that awareness of the situation and driving of the vehicle will be reduced. In order for the driver of the vehicle to relax, in order to make the driver recognize the delegation of driving authority from automatic driving control to manual driving, etc. The technology has been proposed.

  For example, the vehicle behavior control device described in Patent Document 1 is usually used to prompt the occupant to prepare for switching from automatic driving control to manual driving when the switching timing from automatic driving control to manual driving is approaching. A higher jerk is calculated, and the automatic driving control is executed so as to realize the calculated jerk. Thereby, the passenger | crew of a vehicle can change the consciousness with respect to the surrounding condition and driving | running | working of a vehicle.

Japanese Patent Laying-Open No. 2015-209171

  The technique described in Patent Document 1 requires a driving mechanism or a control mechanism for performing automatic operation control that realizes a higher jerk than usual, and has a problem that the configuration of the apparatus is complicated. Moreover, when a high jerk more than a certain level is applied, there is a problem in that the occupant gets sick and gives a sense of discomfort such as motion sickness.

  The present invention has been made to solve the above-described problems, and does not complicate the configuration of the apparatus and does not give an uncomfortable feeling to the occupant. The purpose is to make the delegation aware.

  The noise suppression amount adjusting device according to the present invention refers to a driving control information acquisition unit that acquires information indicating a driving control state of the vehicle, and information indicating a driving control state of the vehicle acquired by the driving control information acquisition unit, When it is determined that the vehicle driving is switched from the automatic driving control to the occupant manual driving in the switching determining unit for determining whether the driving of the vehicle is switched from the automatic driving control to the occupant manual driving, And a suppression amount determination unit that reduces a suppression amount of in-vehicle noise of the vehicle.

  According to the present invention, it is possible to make a driver aware of the delegation of driving authority from automatic driving control to manual driving without causing discomfort to the occupant with an easy configuration.

It is a block diagram which shows the structure of the noise suppression amount adjustment system provided with the noise suppression amount adjustment apparatus by Embodiment 1. FIG. 2A and 2B are diagrams illustrating an example of a suppression amount database of the noise suppression amount adjustment device according to the first embodiment. 3A and 3B are diagrams illustrating a hardware configuration example of the noise suppression amount adjusting device according to the first embodiment. 6 is a flowchart showing the operation of the noise suppression amount adjusting apparatus according to the first embodiment. It is a block diagram which shows the structure of the noise suppression amount adjustment system provided with the noise suppression amount adjustment apparatus by Embodiment 2. It is a figure which shows an example of the weight value database of the noise suppression amount adjustment apparatus by Embodiment 2. It is a figure which shows an example of the suppression amount database of the noise suppression amount adjustment apparatus by Embodiment 2. 6 is a flowchart illustrating an operation of the noise suppression amount adjusting apparatus according to the second embodiment. 6 is a flowchart illustrating an operation of a noise suppression amount adjustment system using the noise suppression amount adjustment device according to the first embodiment or the second embodiment.

Embodiment 1 FIG.
FIG. 1 is a block diagram illustrating a configuration of a noise suppression amount adjustment system including a noise suppression amount adjustment device according to the first embodiment.
The noise suppression amount adjustment system 200 includes a noise suppression amount adjustment device 100 and a noise suppression device 201. The noise suppression amount adjustment system 200 may be configured by further adding an automatic operation control device 400 to the noise suppression amount adjustment device 100 and the noise suppression device 201.

  The noise suppression amount adjusting device 100 refers to the state of automatic driving of the vehicle input from the automatic driving control device 400, and the vehicle interior noise of the vehicle at the timing when the driving of the vehicle is switched from automatic driving control to manual driving. Adjust the amount of suppression. The noise suppression device 201 is composed of, for example, an active noise canceller, obtains information indicating the engine speed and information indicating road noise collected by a microphone or the like, and calculates noise in the vehicle (hereinafter referred to as vehicle noise). Then, a noise cancellation signal which is a signal having a phase opposite to the calculated in-vehicle noise is generated. The noise suppression device 201 determines an output volume when outputting the generated noise cancellation signal based on the suppression amount of the in-vehicle noise adjusted by the noise suppression amount adjustment device 100. The noise suppression device 201 outputs a noise cancellation signal from the in-vehicle speaker 300 at the determined output volume. As a result, the in-vehicle noise is canceled by the noise cancellation signal, and the in-vehicle noise is suppressed. In addition, when the noise suppression apparatus 201 produces | generates a noise cancellation signal, you may consider information other than the information which shows the information which shows an engine speed, and road noise.

The noise suppression amount adjustment device 100 includes an automatic driving control information acquisition unit 101, a switching determination unit 102, a suppression amount determination unit 103, and a suppression amount database 104.
The automatic driving control information acquisition unit 101 acquires information indicating the state of driving control of the vehicle output from the automatic driving control device 400 at all times or at a predetermined timing.
The automatic driving control device 400 is a device that performs automatic driving control of a vehicle. The automatic driving control device 400 includes, as information indicating the state of vehicle driving control, for example, information indicating whether the vehicle is traveling under automatic driving control, information indicating whether the vehicle is traveling under manual driving, or automatic driving of the vehicle When the vehicle is traveling under control, information indicating a scheduled time for switching from automatic operation control to manual operation is output.

  The switching determination unit 102 refers to information indicating the state of driving control of the vehicle acquired by the automatic driving control information acquiring unit 101, and whether the vehicle is traveling under automatic driving control and whether the vehicle is traveling under automatic driving control. If it is, it is determined whether it is the timing to switch to manual operation of the passenger. The switching determination unit 102 has, for example, a preset threshold (for example, 5 minutes), and the time from the current time to the scheduled time for switching from automatic operation control to manual operation is equal to or less than the set threshold. When it becomes, it determines with the driving | operation of a vehicle being the timing which switches from an automatic driving | operation control to a passenger | crew's manual driving | operation.

The suppression amount determination unit 103 refers to the determination result of the switching determination unit 102, and the case where the automatic driving control of the vehicle is continued, and the timing when the driving of the vehicle is switched from the automatic driving control to the manual driving of the occupant, The amount of noise suppression is determined separately for the case after the vehicle driving is switched to the manual driving of the occupant. The noise suppression amount determined by the suppression amount determination unit 103 is output to the noise suppression device 201.
When the automatic driving control of the vehicle is continued, the suppression amount determination unit 103 determines a current noise suppression amount that is defined in advance (for example, a noise suppression amount that suppresses vehicle interior noise by 100%, hereinafter, a specified noise suppression amount). Make a decision to maintain.

  When the vehicle operation is at the timing when the vehicle operation is switched from the automatic operation control to the manual operation of the occupant, the suppression amount determination unit 103 is stepwise so that the noise suppression amount of the in-vehicle noise is reduced most at the time of switching to the manual operation. Make a decision to reduce the amount of noise suppression. That is, the suppression amount determination unit 103 determines the noise suppression amount so that the passenger can hear the in-vehicle noise at the loudest volume at the time of switching to manual driving. The suppression amount determination unit 103 may include a relational expression that indicates the transition of the noise suppression amount between the threshold values (for example, 5 minutes) set in the switching determination unit 102. In this case, the suppression amount determination unit 103 determines the noise suppression amount at each time from the time from the current time to the time when switching to the manual operation and the relational expression. Further, the suppression amount determination unit 103 may determine the noise suppression amount with reference to the suppression amount database 104 as illustrated in FIG. 1. Details of the suppression amount database 104 will be described later.

  The suppression amount determination unit 103 determines that the reduced noise suppression amount is gradually restored to the specified noise suppression amount after the vehicle operation is switched to the manual operation. Also in this case, the suppression amount determination unit 103 may determine the noise suppression amount based on the relational expression indicating the transition of the noise suppression amount, or may determine the noise suppression amount with reference to the suppression amount database 104. Also good.

The suppression amount database 104 corresponds to data that associates the time until the vehicle operation switches to manual operation and the noise suppression amount, and the elapsed time after the vehicle operation switches to manual operation and the noise suppression amount. The attached data is stored.
FIG. 2A shows an example of data in which the time until the vehicle operation is switched to the manual operation is associated with the noise suppression amount. In the example of FIG. 2A, the noise suppression amount is set to be minimal when the vehicle operation is switched to the manual operation. Specifically, when the time until switching is 5 minutes, the in-vehicle noise is suppressed 100%, but the in-vehicle noise is gradually suppressed as time elapses, and the time until switching is 0 minute, that is, the time of switching. Therefore, data for suppressing vehicle interior noise by 30% is set.

  FIG. 2B shows an example of data in which the elapsed time after the driving of the vehicle is switched to the manual driving and the noise suppression amount are associated with each other. In the example of FIG. 2B, when the driving of the vehicle is switched to manual driving, the noise suppression amount is minimized, and is set to return to the specified noise suppression amount (100%) as time elapses. Specifically, data is set that suppresses in-vehicle noise by 60% when one minute elapses after driving of the vehicle is switched to manual operation, and suppresses in-vehicle noise by 100% after elapse of 3 minutes.

Next, a hardware configuration example of the noise suppression amount adjusting device 100 will be described.
3A and 3B are diagrams illustrating a hardware configuration example of the noise suppression amount adjusting device 100.
In the noise suppression amount adjustment device 100, the automatic driving control information acquisition unit 101, the switching determination unit 102, and the suppression amount determination unit 103 may be a processing circuit 110 that is dedicated hardware as illustrated in FIG. As shown in FIG. 3B, the processor 120 may execute a program stored in the memory 130.

  As shown in FIG. 3A, when the automatic operation control information acquisition unit 101, the switching determination unit 102, and the suppression amount determination unit 103 are dedicated hardware, the processing circuit 110 is, for example, a single circuit, a composite circuit, or a program Such a processor, a processor programmed in parallel, an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a combination thereof is applicable. The functions of the respective units of the automatic driving control information acquisition unit 101, the switching determination unit 102, and the suppression amount determination unit 103 may be realized by a processing circuit, or the functions of the respective units may be realized by a single processing circuit. .

  As shown in FIG. 3B, when the automatic driving control information acquisition unit 101, the switching determination unit 102, and the suppression amount determination unit 103 are processors 120, the functions of the respective units are realized by software, firmware, or a combination of software and firmware. Is done. Software or firmware is described as a program and stored in the memory 130. The processor 120 implements the functions of the automatic driving control information acquisition unit 101, the switching determination unit 102, and the suppression amount determination unit 103 by reading and executing the program stored in the memory 130. That is, the automatic operation control information acquisition unit 101, the switching determination unit 102, and the suppression amount determination unit 103 are programs that, when executed by the processor 120, result in each step shown in FIG. Is provided. Further, it can be said that these programs cause the computer to execute the procedures or methods of the automatic driving control information acquisition unit 101, the switching determination unit 102, and the suppression amount determination unit 103.

Here, the processor 120 is, for example, a CPU (Central Processing Unit), a processing device, an arithmetic device, a processor, a microprocessor, a microcomputer, or a DSP (Digital Signal Processor).
The memory 130 may be, for example, a nonvolatile or volatile semiconductor memory such as a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, an EPROM (Erasable Programmable ROM), or an EEPROM (Electrically EPROM). Further, it may be a magnetic disk such as a hard disk or a flexible disk, or an optical disk such as a mini disk, CD (Compact Disc), or DVD (Digital Versatile Disc).

  In addition, about each function of the automatic driving control information acquisition part 101, the switching determination part 102, and the suppression amount determination part 103, a part may be implement | achieved by a dedicated hardware and a part may be implement | achieved by software or firmware. . As described above, the processing circuit 110 in the noise suppression amount adjusting device 100 can realize the above-described functions by hardware, software, firmware, or a combination thereof.

Next, the operation of the noise suppression amount adjusting device 100 will be described.
FIG. 4 is a flowchart showing the operation of the noise suppression amount adjusting apparatus 100 according to the first embodiment.
When the automatic driving control information acquisition unit 101 acquires information indicating the driving control state of the vehicle from the automatic driving control device 400 (step ST1), the switching determination unit 102 receives the information indicating the acquired driving control state of the vehicle. It is determined whether or not the vehicle driving is automatic driving control (step ST2). It is assumed that the automatic driving control information acquisition unit 101 acquires information indicating the state of driving control of the vehicle at predetermined intervals from the automatic driving control device 400.

  When the driving of the vehicle is not automatic driving control (step ST2; NO), the process returns to step ST1. On the other hand, when the driving of the vehicle is automatic driving control (step ST2; YES), the switching determination unit 102 determines whether or not the time until the driving of the vehicle further switches to manual driving is equal to or less than a preset threshold value. Is performed (step ST3).

  When the time when the driving of the vehicle is switched to the manual driving is not less than the preset threshold value (step ST3; NO), the determination process of step ST3 is repeated. On the other hand, when the time when the driving of the vehicle is switched to the manual driving is equal to or less than a preset threshold (step ST3; YES), the switching determination unit 102 outputs the time until switching to the manual driving to the suppression amount determining unit 103. (Step ST4).

  The suppression amount determination unit 103 determines a noise suppression amount corresponding to the time until switching to the manual operation output in step ST4 (step ST5). The suppression amount determination unit 103 outputs the noise suppression amount determined in step ST5 to the noise suppression device 201 (step ST6). When the suppression amount determination unit 103 outputs the noise suppression amount to the noise suppression device 201, the switching determination unit 102 refers to the information indicating the vehicle driving control state acquired by the automatic driving control information acquisition unit 101 again. It is determined whether or not the driving of the vehicle has been switched to manual driving (step ST7).

  When it is determined that the driving of the vehicle has not been switched to manual driving (step ST7; NO), the process returns to step ST4 and the above-described processing is repeated. On the other hand, when it is determined that the driving of the vehicle has been switched to manual driving (step ST7; YES), the suppression amount determination unit 103 determines a noise suppression amount corresponding to the time elapsed after switching to manual driving (step ST7). ST8). The suppression amount determination unit 103 outputs the noise suppression amount determined in step ST8 to the noise suppression device 201 (step ST9), and determines whether or not the noise suppression amount has returned to the specified value (step ST10). When the noise suppression amount returns to the specified value (step ST10; YES), the flow returns to the process of step ST1. On the other hand, when the noise suppression amount has not returned to the specified value (step ST10; NO), the process returns to step ST8 and the above-described process is repeated.

  As described above, according to the first embodiment, the automatic driving control information acquisition unit 101 that acquires information indicating the driving control state of the vehicle and the information indicating the driving control state of the vehicle are referred to. The switching determination unit 102 that determines whether or not the driving is switched from the automatic driving control to the occupant manual driving, and when it is determined that the driving of the vehicle is switched from the automatic driving control to the occupant manual driving, Since the suppression amount determination unit 103 for reducing the suppression amount is provided, the occupant's consciousness with respect to the situation of the vehicle and the driving of the vehicle is changed without causing discomfort to the occupant. You can be made aware of the delegation of driving authority to driving. In addition, the consciousness of the occupant can be changed with an easy configuration without providing a complicated configuration in the noise suppression amount adjusting device 100.

  Further, according to the first embodiment, the suppression amount determination unit 103 is configured to change the in-vehicle noise stepwise in the period from when the vehicle operation is switched to the automatic operation control to the occupant manual operation. It is possible to gradually let the passengers hear the noise in the vehicle, change the occupant's awareness of the situation around the vehicle and the driving of the vehicle without giving the passenger an uncomfortable feeling, and the driving authority from automatic driving control to manual driving You can be aware of delegation.

  Further, according to the first embodiment, after the driving of the vehicle is switched from the automatic driving control to the manual driving of the occupant, the reduced suppression amount of the in-vehicle noise of the vehicle is returned to the preset specified value. Since it comprised, the environment in a vehicle can be kept favorable.

  In Embodiment 1 described above, by applying a directional speaker as the in-vehicle speaker 300, the volume of in-vehicle noise can be changed only for the driver among the occupants. Thereby, it is possible to maintain a relaxed state for the occupant without causing all the occupants of the vehicle to hear the in-vehicle noise.

Moreover, in Embodiment 1 mentioned above, the automatic operation control apparatus 400 outputs the information which shows the scheduled time which switches from automatic operation control to manual operation to the automatic operation control information acquisition part 101 of the noise suppression amount adjustment apparatus 100. However, the distance from the automatic operation control to the point where the manual operation is switched may be notified.
In that case, the switching determination unit 102 has a distance threshold (for example, 5 km) for determining whether it is a timing for switching to the occupant's manual driving, and the distance from the current position to the point for switching to the manual driving is When the vehicle is below the set threshold, it is determined that it is time to switch the vehicle operation from the automatic operation control to the occupant manual operation.

Embodiment 2. FIG.
The second embodiment shows a configuration for controlling the noise suppression amount of in-vehicle noise in order to alert a passenger when driving of the vehicle is automatic driving control.
FIG. 5 is a block diagram illustrating a configuration of a noise suppression amount adjustment system 200a including the noise suppression amount adjustment device 100a according to the second embodiment.
The noise suppression amount adjustment system 200a includes a noise suppression amount adjustment device 100a and a noise suppression device 201. The noise suppression amount adjustment system 200a may be configured by further adding an automatic operation control device 400 to the noise suppression amount adjustment device 100a and the noise suppression device 201.
The noise suppression amount adjustment device 100a according to the second embodiment is obtained by adding an information acquisition unit 105, a suppression determination unit 106, and a weight value database 107 to the noise suppression amount adjustment device 100 according to the first embodiment illustrated in FIG. It is the structure provided with the suppression amount determination part 103a and the suppression amount database 104a instead of the suppression amount determination part 103 and the suppression amount database 104 provided. 5, parts that are the same as or correspond to those in FIG. 1 are given the same reference numerals, and descriptions thereof are omitted.

The information acquisition unit 105 acquires information related to the map information, such as information on points where accidents frequently occur and information indicating dangerous locations on the traveling road, from the external storage area 501. The external storage area 501 includes a storage area for in-vehicle devices such as navigation devices, an external server, and the like.
In addition, the information acquisition unit 105 acquires information indicating that an emergency vehicle such as an ambulance, a fire engine, or a police car is approaching the host vehicle from the external sensor 502 mounted on the vehicle. The external sensor 502 includes, for example, an external camera on which the host vehicle is installed and an external microphone.
Furthermore, the information acquisition unit 105 acquires information indicating the occurrence of an accident and a disaster via the external network 503. The external network 503 includes radio broadcasting, communication services such as VICS (registered trademark / hereinafter, omitted), road-to-vehicle communication, vehicle-to-vehicle communication, and the like. To explain with a specific example, the information acquisition unit 105 acquires information on construction sites and traffic jams provided from radio broadcasts, emergency earthquake warnings, and the like, and from the traffic information provided from VICS, Information on traffic congestion points is acquired, and information on accidents that occurred in front of the host vehicle is acquired by road-to-vehicle communication or vehicle-to-vehicle communication.

  The suppression determination unit 106 refers to the information stored in the weight value database 107 and calculates the weight value of the external information acquired by the information acquisition unit 105. When the calculated weight value of the external information is equal to or greater than the threshold value, the suppression determination unit 106 determines that the external state of the vehicle is a situation that should alert the vehicle occupant, and reduces the suppression amount of in-vehicle noise. Is determined. The suppression determination unit 106 outputs a determination result as to whether or not the suppression amount of in-vehicle noise is reduced and a weight value of external information to the suppression amount determination unit 103a. In addition, as will be described later, when a plurality of weight values are given, the suppression amount determination unit 106 calculates a sum value of the plurality of weight values.

The weight value database 107 is an area for storing weight values set in advance for various information acquired by the information acquisition unit 105.
FIG. 6 is a diagram illustrating an example of the weight value database 107 of the noise suppression amount adjustment apparatus 100a according to the second embodiment.
FIG. 6 shows an example of weight values when the information acquisition unit 105 acquires accident frequent occurrence point information, emergency vehicle approach information, accident and disaster occurrence information. For external information, negative factors (for example, accident location information) and positive factors (for example, no detection of pedestrians, detection of only self-driving vehicles and good visibility) are defined, and negative factors are positive values. Is given, and a negative weight value is given for a positive factor.

  When the information acquisition part 105 acquires accident frequent occurrence point information, it shows that the weight value database 107 gives weight value "10". On the other hand, when the information acquisition unit 105 has acquired accident-prone location information, but a pedestrian is not detected in the surroundings from the information of the external sensor 502, a weight value “−5” is further given to the surroundings from the information of the external network 503. When only the autonomous driving vehicle is detected, the weight value “−5” is further given, and when the forecast is good in the daytime from the information of the external sensor 502, the weight value “−2” is further given.

  Next, when the information acquisition unit 105 acquires emergency vehicle approach information, the weight value database 107 indicates that a weight value “20” is given. On the other hand, when the information acquisition unit 105 acquires emergency vehicle approach information, but only an automatically driven vehicle is detected in the surroundings from the information of the external network 503, it is assumed that an unexpected movement by the manually driven vehicle does not occur. A weight value “−5” is given, and when the travel route of the emergency vehicle and the travel route of the host vehicle are not the same based on the information in the external storage area 501 and the external network 503, the weight value “−15” is further given. ing.

  Next, when the information acquisition unit 105 acquires accident and disaster occurrence information, the weight value database 107 indicates that a weight value “10” is given. On the other hand, when the information acquisition unit 105 acquires the accident occurrence information, but there is an accident vehicle on the travel route of the own vehicle from the information of the external network 503, but the emergency vehicle has already arrived at the location of the accident vehicle. Further gives a weight value “−5”. Further, although the information acquisition unit 105 has acquired disaster occurrence information, when the host vehicle is traveling on an automobile-only road from the external storage area 501, it is not necessary to consider the jumping out of people on the roadway. It shows that the value “−5” is given.

  When the suppression amount determination unit 103a receives the determination result as to whether the suppression amount of the in-vehicle noise is reduced and the weight value of the external information from the suppression determination unit 106, the suppression amount determination unit 103a refers to the suppression amount database 104a and determines the suppression amount of the in-vehicle noise. decide. The suppression amount determination unit 103a determines the suppression amount of in-vehicle noise according to the weight value of the external information. In that case, the suppression amount determination unit 103a determines the in-vehicle noise suppression amount with reference to the in-vehicle noise suppression amount associated with the weight value stored in the suppression amount database 104a. Note that the above-described weight value of the external information includes the sum of the weight values of the external information.

FIG. 7 is a diagram illustrating an example of the suppression amount database 104a of the noise suppression amount adjustment apparatus 100a according to the second embodiment. In the example of FIG. 7, a case where the weight value is a sum value is shown as an example.
In the suppression amount database 104a, the greater the sum of the weight values, the higher the urgency, and the state outside the vehicle is a situation that should alert the vehicle occupant, and a value that further suppresses the suppression amount of in-vehicle noise is set. Is done. On the other hand, in the suppression amount database 104a, the urgency is not high when the sum of the weight values is small, and the necessity of notifying the occupant of the change in the situation around the vehicle is low. A value that does not change the amount or moderately suppresses the amount of suppression of vehicle interior noise is set.
The suppression amount determination unit 103a refers to the suppression amount database 104a, and when the urgency of the situation around the vehicle is high, sets the suppression amount of the in-vehicle noise to be low and informs the occupant of the in-vehicle noise. On the other hand, the suppression amount determination unit 103a refers to the suppression amount database 104a, and when the urgency of the situation around the vehicle is low, the suppression amount of the in-vehicle noise is not changed or is gradually changed so that the occupant There is no big noise in the car.

  When the suppression amount determination unit 103a receives a determination result indicating that the suppression amount of the in-vehicle noise is reduced from the suppression determination unit 106, the suppression amount determination unit 103a does not consider the weight value of the external information or the sum of the weight values of the external information, and The noise suppression amount may be set to a preset value.

Next, a hardware configuration example of the noise suppression amount adjusting device 100a will be described with reference to FIGS. 3A and 3B described in the first embodiment. Note that the description of the same configuration as that of Embodiment 1 is omitted.
The information acquisition unit 105, suppression determination unit 106, and suppression amount determination unit 103a in the noise suppression amount adjustment device 100a may be a processing circuit 110 that is dedicated hardware as illustrated in FIG. 3A or illustrated in FIG. 3B. Thus, the processor 120 that executes the program stored in the memory 130 may be used.

Next, the operation of the noise suppression amount adjusting apparatus 100a according to the second embodiment will be described.
FIG. 8 is a flowchart showing the operation of the noise suppression amount adjusting apparatus 100a according to the second embodiment. In FIG. 8, the same steps as those in the flowchart of the noise suppression amount adjustment apparatus 100 of the first embodiment shown in FIG.
In step ST3, when the switching determination unit 102 determines that the time until the vehicle driving is switched to the manual driving is not less than or equal to a preset threshold (step ST3; NO), the suppression determination unit 106 includes the information acquisition unit 105. It is determined whether or not external information has been acquired (step ST21).

  When the information acquisition unit 105 has not acquired external information (step ST21; NO), the process returns to step ST1. On the other hand, when the information acquisition unit 105 acquires external information (step ST21; YES), the suppression determination unit 106 adds the weight values of the acquired external information (step ST22), and the combined weight value is equal to or greater than the threshold value. It is determined whether or not there is (step ST23). If the combined weight value is less than the threshold value (step ST23; NO), the process returns to step ST1. On the other hand, when the combined weight value is equal to or greater than the threshold (step ST23; YES), the suppression determination unit 106 outputs an instruction to adjust the suppression amount of the in-vehicle noise, and the combined weight value is determined as the suppression amount determination unit 103a. (Step ST24).

  The suppression amount determination unit 103a determines the suppression amount of in-vehicle noise with reference to the suppression amount database 104a based on the combined weight value output in step ST24 (step ST25). The suppression amount determination unit 103a outputs the noise suppression amount determined in step ST25 to the noise suppression device 201 (step ST26). Thereafter, the suppression determination unit 106 determines whether the information acquisition unit 105 continues to acquire external information (step ST27). When acquisition of external information is continued (step ST27; YES), the processing returns to step ST22 and the above-described processing is repeated.

On the other hand, when acquisition of external information is not continued (step ST27; NO), the suppression determination unit 106 outputs an instruction to return the suppression amount of in-vehicle noise to a specified value to the suppression amount determination unit 103a (step ST28). . Based on the instruction output in step ST28, the suppression amount determination unit 103a returns the suppression amount of in-vehicle noise to a specified value (step ST29), returns to the process of step ST1, and repeats the above-described process.
In the description of the flowchart of FIG. 8 described above, the case where processing is performed using the combined weight values has been described as an example, but processing can be performed using a single weight value.

  As described above, according to the second embodiment, the information acquisition unit 105 that acquires the external information indicating the external state of the vehicle, and the acquired external information are referred to, and the external state of the vehicle is the vehicle occupant. And a suppression determination unit 106 that determines whether or not to reduce the suppression amount of the in-vehicle noise of the vehicle based on whether or not the suppression amount determination unit 103a Based on the results, it was configured to reduce the amount of noise suppression in the vehicle, so in addition to the timing of switching from automatic driving control to manual driving, the situation outside the vehicle should alert the vehicle occupant. In some cases, it is possible to alert a passenger to the situation around the vehicle.

  Further, according to the second embodiment, the suppression determination unit 106 is configured to determine the weight value that is the degree of the situation that should alert the vehicle occupant in consideration of the negative factor of the external information and the positive factor. Therefore, it is possible to assign a weight value and determine the amount of noise suppression in the vehicle according to the surrounding situation.

  The passenger in the first and second embodiments described above may be at least a driver of the vehicle, and may include a passenger in the passenger seat or the rear seat.

Next, the operation of the noise suppression amount adjustment system 200, 200a provided with the noise suppression amount adjustment device 100 shown in the first embodiment or the noise suppression amount adjustment device 100a shown in the second embodiment will be described with reference to FIG. While explaining.
FIG. 9 is a flowchart showing the operation of the noise suppression amount adjustment systems 200 and 200a according to the first or second embodiment.
The automatic driving control device 400 controls the automatic driving of the vehicle and outputs information indicating the state of the driving control of the vehicle to the noise suppression amount adjusting devices 100 and 100a (step ST31). The noise suppression amount adjusting devices 100 and 100a adjust the noise suppression amount based on the information indicating the vehicle driving control state output in step ST31 (step ST32). As detailed processing operations of step ST32 of the noise suppression amount adjusting devices 100 and 100a, processing of each step of the flowchart shown in FIG. 4 or processing of each step of the flowchart shown in FIG. 8 is performed.

  The noise suppression device 201 generates a noise cancellation signal based on the engine speed of the vehicle, the collected road noise, and the like (step ST33). The noise suppression apparatus 201 determines the output volume of the noise cancellation signal generated in step ST33 based on the noise suppression amount adjusted in step ST32 (step ST34). The noise suppression device 201 controls the in-vehicle speaker 300 so as to output the noise cancellation signal at the output volume determined in step ST34 (step ST35). Thereafter, the flow returns to the process of step ST31 and repeats the above-described process.

  As described above, the noise suppression amount adjustment systems 200 and 200a generate the noise cancellation signal having a phase opposite to the in-vehicle noise based on the noise suppression amount adjustment devices 100 and 100a and the vehicle information and the traveling environment of the vehicle. Since the noise suppression amount adjusting device 100, 100a is configured to include the noise suppression device 201 that controls the volume of the noise cancellation signal output from the vehicle interior speaker 300 based on the amount of suppression of the vehicle interior noise determined by the noise suppression amount adjustment device 100, 100a. The output volume of the noise cancellation signal can be controlled based on the noise suppression amount determined by the suppression amount adjusting device.

  In the present invention, within the scope of the invention, any combination of each embodiment, any component of each embodiment can be modified, or any component of each embodiment can be omitted.

  DESCRIPTION OF SYMBOLS 100,100a Noise suppression amount adjustment apparatus, 101 Automatic driving information acquisition part, 102 Switching determination part, 103,103a Suppression amount determination part, 104,104a Suppression amount database, 105 Information acquisition part, 106 Suppression determination part, 107 Weight value database , 200, 200a Noise suppression amount adjustment system, 201 noise suppression device, 300 in-car speaker, 400 automatic driving control device, 501 external storage area, 502 external sensor, 503 external network.

Claims (8)

A driving control information acquisition unit for acquiring information indicating a state of driving control of the vehicle;
A switching determination unit that determines whether or not the driving of the vehicle is switched from automatic driving control to manual driving of an occupant with reference to information indicating the state of driving control of the vehicle acquired by the driving control information acquiring unit;
A noise suppression amount comprising: a suppression amount determining unit that reduces the suppression amount of in-vehicle noise of the vehicle when the switching determination unit determines that the driving of the vehicle is switched from automatic driving control to manual operation of the occupant Adjustment device.   The suppression amount determination unit returns the reduced suppression amount of in-vehicle noise of the vehicle to a preset specified value after the driving of the vehicle is switched from automatic driving control to manual operation of the occupant. The noise suppression amount adjusting device according to claim 1, wherein:   The switching determination unit is configured to determine whether or not the vehicle is based on the time from the information indicating the driving control state of the vehicle to the time when the driving of the vehicle is switched to the manual driving or the distance to the point where the driving of the vehicle is switched to the manual driving. The noise suppression amount adjusting device according to claim 1 or 2, wherein it is determined whether or not driving is switched from automatic driving control to manual driving of the occupant. An information acquisition unit for acquiring external information indicating an external state of the vehicle;
Whether to reduce the amount of suppression of in-vehicle noise of the vehicle based on whether the external state of the vehicle indicated by the external information acquired by the information acquisition unit is a situation that should alert the passenger of the vehicle A suppression determination unit that determines whether or not
The said suppression amount determination part reduces the suppression amount of the vehicle interior noise of the said vehicle based on the determination result of the said suppression determination part, The any one of Claims 1-3 characterized by the above-mentioned. Noise suppression amount adjustment device. The suppression determination unit uses at least one of information related to map information, detection information outside the vehicle, and information provided via a communication service, to alert a passenger of the vehicle And whether to reduce the amount of noise suppression in the vehicle according to the calculated degree,
The said suppression amount determination part determines the suppression amount of the vehicle interior noise of the said vehicle based on the determination result of the said suppression determination part, and the said degree which the said suppression determination part calculated. Noise suppression amount adjustment device. The noise suppression amount adjusting device according to any one of claims 1 to 5,
Based on the information on the vehicle and the traveling environment of the vehicle, a noise cancellation signal having an opposite phase to the in-vehicle noise is generated, and the suppression amount of the in-vehicle noise determined by the suppression amount determination unit of the noise suppression amount adjustment device A noise suppression amount adjustment system comprising: a noise suppression device that controls a volume of the noise cancellation signal output from an in-vehicle speaker of the vehicle.   The noise suppression amount adjustment system according to claim 6, further comprising an automatic operation control device that controls automatic operation of the vehicle and outputs information indicating a state of operation control of the vehicle to the noise suppression amount adjustment device. Driving control information acquisition procedure for acquiring information indicating the state of driving control of the vehicle,
A switching determination procedure for determining whether or not the driving of the vehicle is switched from automatic driving control to manual driving of an occupant with reference to information indicating the state of driving control of the vehicle;
In order to cause the computer to execute a suppression amount determination procedure for reducing the suppression amount of in-vehicle noise of the vehicle when it is determined in the switching determination procedure that the driving of the vehicle is switched from automatic driving control to manual operation of the occupant. Noise suppression amount adjustment program.

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