Speed ​​exceeds notification device

Abstract

The present invention reduces a load on a driver when using a specified maximum speed of a road acquired by image recognition or the like as a set speed of a vehicle. When the specified maximum speed is to be reflected in the set speed, in a case in which it is necessary to reject the reflection in the set speed in order to fall below the lower limit which can be set to the set speed, the notification of a rejection sound by the setting change unavailability notification unit is stopped while a speed excess alarm sound by the speed excess alarm part is sounding.

Description

Technical Field

[0001] This invention relates to an apparatus and operation for suppressing vehicle speed overrun.

Background Art

[0002] When driving, it is essential to check road signs, but it is not always possible for drivers to fully check all road signs, and oversight can occur. In response, mechanisms for reading road sign information with vehicle-side mechanisms and reflecting it in driving for safe driving have been studied. For example, Patent Document 1 proposes a technique for identifying display objects by LiDAR from an imaging range captured by a camera that images the front of a vehicle and performing image recognition to recognize road information. This recognized road information such as speed limits is notified to passengers.

[0003] On the other hand, controlling a vehicle according to a set speed set by a driver has already been implemented (Non-Patent Document 1). When the vehicle speed is about to exceed the set speed, for example, restrictions are placed on the wheel torque to suppress the exceeding of the set speed. Also, the maximum speed information is presented to the driver, and the driver is also notified when the maximum speed information changes (2.2 in Non-Patent Document 1). It is recommended to request approval from the driver to change the upper limit shortly after the presented speed limit changes (2.3.2.2 in Non-Patent Document 1).

[0004] However, when a temporary regulation is recognized in a location where road construction, etc. is being carried out, techniques for rejecting based on road sign information have also been proposed (Patent Documents 2, 3).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

[0006] [Non-Patent Document 1] Ministry of Land, Infrastructure, Transport and Tourism, Road Transport Bureau, Advanced Safety Vehicle Promotion Study Group, Basic Design Document for Automatic Speed ​​Control System (ISA), [online], December 2019, [Retrieved October 13, 2023], Internet<URL:https: / / www.mlit.go.jp / report / press / content / 001320703.pdf> [Overview of the project] [Problems that the invention aims to solve]

[0007] However, as stated in Non-Patent Document 1, "2.2.5 Information Presentation When the Speed ​​Limit Changes," "If a beep sounds every time the speed limit changes, drivers may find it annoying and disable the function, or they may become confused because they don't know what the warning sound is for. It is necessary to consider HMI design according to the system and driving situation, such as explicitly displaying that a new speed limit has been reached." This indicates that there are cases where the sound of the warning is annoying to the driver.

[0008] On the other hand, a warning must be issued if the vehicle's speed exceeds the maximum speed limit. There were concerns that if this warning and the speed limit notification overlapped, it would require the driver to process information simultaneously, increasing annoyance and raising the driver's workload.

[0009] Therefore, this invention aims to reduce the burden on the driver when using the designated maximum speed of a road, obtained through image recognition or the like, as the vehicle's set speed. [Means for solving the problem]

[0010] This invention is A maximum speed information acquisition unit that acquires the designated maximum speed of the road on which the vehicle is traveling, A vehicle control unit that controls the vehicle according to a set speed within a preset speed range, A setting reflection unit that reflects the specified maximum speed in the set speed, A setting change rejection notification unit that provides an audible notification when the aforementioned setting speed change is rejected, A speed limit warning unit that notifies the driver by voice when the driving speed exceeds the set speed, It has, When the specified maximum speed is less than the lower limit or greater than the upper limit of the set speed range, the setting reflection unit rejects the reflection, The above problem is solved by the first solution, which is a speeding notification device that stops the notification of the rejection sound by the setting change inability notification unit while the speeding warning sound from the speeding warning unit is sounding.

[0011] Furthermore, the speeding notification device according to this invention, in addition to the first solution, A second solution can be adopted, which involves stopping the notification of the reject sound by the setting change inability notification unit while a predetermined time has not elapsed since the speeding warning sound finished sounding.

[0012] Furthermore, the speeding notification device according to this invention is As a third solution, this invention can employ an automobile having a speeding notification device according to the first or second solution. [Effects of the Invention]

[0013] In current vehicles, there is a system-level control limit for the set speed at which engine or motor drive is restricted to curb further acceleration, making it impossible to limit the speed to extremely low levels. Specifically, if the lower limit of this limitable set speed is 30 km / h, even if you try to set the speed to 20 km / h, the system cannot restrict acceleration when the accelerator is pressed up to 30 km / h. Therefore, in areas with particularly low designated speed limits, such as residential areas or parking lots, where the designated speed limit is around 10-20 km / h, it is not possible to reflect the designated speed limit in the set speed. On such roads, if a driver drives believing that the designated speed limit is sufficiently reflected in the set speed, there is a risk of unexpected acceleration up to around 30 km / h. On the other hand, when obtaining the designated speed limit from image recognition or map information, there are cases where the designated speed limit is recognized as an illegal high speed exceeding 120 km / h due to misrecognition of images or partial data corruption, which deviates from the actual situation. Setting the speed to such an inappropriate value, both legally and in terms of the actual vehicle, would not contribute to safe driving, and therefore it must be rejected. Due to these circumstances, when the setting application by the setting application unit is rejected, the vehicle speed change rejection notification unit provides an audible notification to inform the driver that the intended setting application by the setting application unit has been rejected.

[0014] In the overspeed notification device according to the present invention, even when such a reflection must be rejected, while the overspeed warning sound by the overspeed warning unit is sounding, the notification of the rejection sound by the setting change prohibition notification unit is stopped or withheld. At a location where the specified maximum speed is set low enough to be rejected, the unreflected set speed exceeds the lower limit of the actually limit-able set speed, and the overspeed state where the traveling speed exceeds the unreflected set speed is dangerous if not resolved immediately. Therefore, the inevitable notification that must be rejected has a lower urgency compared to this overspeed, and by stopping or withholding the rejection sound and giving priority to sounding the overspeed warning sound, it is possible to avoid making the driver hear the notification sounds simultaneously. As a result, the driver is not bothered by the rejection sound with low urgency and can concentrate on decelerating upon receiving the notification of the high-urgency overspeed.

Brief Description of the Drawings

[0015] [Figure 1] Conceptual diagram showing an embodiment of the overspeed notification device according to the present invention and the surrounding situation [Figure 2A] Diagram showing an example of the normal state of the optical display unit [Figure 2B] Diagram showing an example of the state of the optical display unit at the time of overspeed [Figure 3] Correspondence diagram of the sounding conditions and actual sounding conditions of the rejection sound and the overspeed warning sound [Figure 4] Flow example diagram in one form of the overspeed notification device according to the present invention [Figure 5] Flow example diagram branched from a part of FIG. 4

Embodiments for Carrying Out the Invention

[0016] Hereinafter, embodiments of the present invention will be described using the functional block diagram shown in FIG. 1. The speeding notification device 10 according to this invention is installed in an automobile 1. This automobile 1 may be an engine-driven vehicle or an electric vehicle. If it is an electric vehicle, it may be a hybrid vehicle that has an engine. If it is a hybrid vehicle, it may not only be charged by electricity generated by the engine, but may also be a plug-in hybrid vehicle (PHEV) that can supply power to an external source. In other words, the type of automobile 1 is basically irrelevant. However, in this invention, whether it is engine-driven or motor-driven, it is necessary to have a vehicle control unit 20 that limits acceleration according to a set speed.

[0017] The vehicle control unit 20 has a semiconductor computing device and memory, and in response to output requests from the operation of control devices such as the accelerator, it sends commands such as operation instructions and output requests for the engine and motor, and acquires data from each part. The vehicle control unit 20 realizes the functions of each part described later by executing stored programs and by dedicated circuits. In particular, rather than providing a separate computing device solely for the vehicle control unit 20, it is preferable that the program realizing this invention be introduced and executed on the ECU (Electronic Control Unit) installed in the automobile 1 for driving control, thereby being implemented as an additional function that is easier to introduce. Furthermore, it is preferable that the speed limit notification device 10 according to this invention has a set speed range, which is the range in which the vehicle speed can be controlled, set in advance at the time of shipment. This value can be set by both legal restrictions and actual operational restrictions of the vehicle. For example, the lower limit for operation may be set to 30 km / h, and the upper limit for law may be set to the highest legal speed in the target country plus the meter display error. For example, in Japan, one option is to set the maximum speed on the Shin-Tomei Expressway at 135 km / h, adding a margin of error of +10 to 15 km / h to the existing 120 km / h speed limit. Another option is to leave the maximum speed limit to the driver and set it at 200 km / h, which is higher than the vehicle's limits, effectively making it unlimited.

[0018] The speeding notification device 10 according to this invention has a maximum speed information acquisition unit 21 that acquires the designated maximum speed of the road on which the automobile 1 is traveling. The means of acquiring the designated maximum speed of the road on which the automobile 1 is traveling is not limited, and data acquired by various functions of the automobile 1 may be selectively adopted.

[0019] One method for obtaining the designated maximum speed is to acquire a video of the view in front of the vehicle from a camera 31 mounted on the front of the vehicle 1, and then use an image recognition unit 32 to capture speed limit information from speed limit signs and road markings included in this video. The image recognition unit 32 may perform the recognition by executing an image recognition AI program within the vehicle control unit 20 itself, or it may acquire the information via dedicated image recognition hardware.

[0020] Another method for obtaining the designated maximum speed is, for example, a method in which location information is obtained from an antenna (not shown) compatible with a satellite positioning system such as GPS (location information acquisition unit 33), and the designated maximum speed of the road being traveled at that time is obtained by the road information unit 35 from a map information database 34 held as car navigation software in the vehicle 1. It should be noted that instead of the map information database 34 owned by the vehicle 1, a map information database 34 on a network connected via a mobile communication network or the like may be referenced. In this case, the vehicle 1 has a network connection unit that connects to a network such as a mobile communication network.

[0021] In either method, the acquired designated maximum speed is stored in the memory of the vehicle control unit 20.

[0022] The speeding notification device 10 according to this invention has an interface unit that can notify, display, and accept operations from the driver of necessary information. The interface unit consists of an input unit 41 that accepts operations such as setting changes by the operator, an optical display unit 42 that performs optical displays, and an audio unit 43 that outputs sound.

[0023] The input unit 41 may include physical devices such as switches and levers, as well as a touchpad integrated with the optical display unit 42. In particular, it is preferable, from the standpoint of safety and reliability during operation, to have a dedicated switch that allows for easy input while driving, located inside the steering wheel or near the steering wheel or shift lever. This input unit 41 operates the setting reflection unit 40, which will be described later.

[0024] The optical display unit 42 is formed by selecting a configuration that is easily understandable to the operator from a monitor made of liquid crystal or organic EL, a lighting unit that uses light points such as LEDs to display digital numbers and meters, an analog meter, etc., and notifies the operator's vision. It has at least a designated maximum speed display unit 22 that displays the designated maximum speed acquired by the maximum speed information acquisition unit 21, an execution limit speed display unit 23 that displays a set speed which is the value at which the vehicle control unit 20 limits the vehicle's engine and motor so as not to allow acceleration beyond that speed at the present time, and a speed display unit 24 that displays the current speed of the vehicle 1 obtained by the vehicle speed sensor 37. An example of a display in which the designated maximum speed display unit 22, the execution limit speed display unit 23, the speed display unit 24, and the speeding display unit 27, which will be described later, are arranged on this optical display unit 42 is shown in Figures 2A and 2B. In the situation shown in Figure 2A, the designated maximum speed (designated maximum speed display unit 22) obtained from traffic signs, etc., is 50 km / h, the set speed currently configured for vehicle 1 (actual speed limit display unit 23) is 80 km / h, and the current driving speed (speed display unit 24) is 74 km / h. In this case, if the designated maximum speed is reflected in the set speed, as shown in Figure 2B, the vehicle speed will exceed the set speed, resulting in a speed violation.

[0025] Furthermore, the optical display unit 42 has an overspeed indicator unit 27 that provides optical notification when the actual driving speed exceeds the set speed. This overspeed indicator unit 27 is made easily understandable to the operator if it is provided in close proximity to the speed display unit 24, or if it is implemented by adding an additional display method to the speed display unit 24. For example, a bright light point 30 is placed around the numerical portion of the driving speed shown by the speed display unit 24 to draw attention, and when the driving speed exceeds the set speed, the light point 30 is illuminated to draw attention, or the numerical portion of the driving speed shown by the speed display unit 24 itself is made to flash.

[0026] The audio unit 43 primarily notifies the operator's hearing through notification and warning sounds. Specifically, it consists of an in-vehicle speaker and a sound source that plays a predetermined sound to the in-vehicle speaker. Notification sounds include short sounds that indicate that an operation to change the set speed has been accepted and that the set speed has actually been changed. Warning sounds include sounds that may be sustained to indicate that the driving speed exceeds the set speed.

[0027] The speeding notification device 10 according to this invention includes a setting change notification unit 25 that notifies by voice when the set speed is changed, a speeding warning unit 26 that notifies by voice when the actual driving speed exceeds the set speed, and a setting change rejection notification unit 29 that notifies by voice when the change of the set speed is rejected, all of which are performed by emitting a predetermined sound from the voice unit 43.

[0028] Of these, the speed limit warning sound from the speed limit warning unit 26, which notifies the driver that they have exceeded the speed limit, should be sounded for a longer duration than other notification sounds so that the driver does not miss it. Specifically, it should be between 2 seconds and 20 seconds in length. In addition, if the sound from the speed limit warning unit 26 is stopped promptly once the speed limit has been resolved, the driver can be informed that the speed limit has been resolved by the cessation of the sound.

[0029] Furthermore, the voice notification from the setting change notification unit 25 and the voice notification from the setting change invalid notification unit 29 (rejection sound) are different so that the driver can distinguish between them. However, they can also be distinguished by setting them to be the same sound played only a few times. These are preferably short voices of about 2 seconds or less, as this reduces annoyance.

[0030] The normal behavior of this vehicle 1 while driving is as follows: The vehicle speed obtained from the vehicle speed sensor 37 is displayed on the speed display unit 24 in real time on the optical display unit 42. In addition, the designated maximum speed for the road currently being driven on, obtained from the maximum speed information acquisition unit 21, is displayed on the designated maximum speed display unit 22. This designated maximum speed is not automatically reflected in the set speed, but is reflected by the setting reflection unit 40, which receives input from the driver via the input unit 41. When an operation to reflect the designated maximum speed in the set speed is confirmed, or when the designated maximum speed has been reflected in the set speed, the setting change notification unit 25 emits a notification sound to notify the driver of this fact.

[0031] The vehicle control unit 20, when the driving speed exceeds the set speed, either does not operate the engine, motor, or other mechanisms that accelerate the vehicle, or suppresses the acceleration to prevent further speeding. When driving on level ground under normal conditions, if the accelerator is pressed at a time when the driving speed would exceed the set speed, the vehicle control unit 20 suppresses the acceleration so that the vehicle can travel within the set speed range.

[0032] However, if the set speed is too low, acceleration itself becomes difficult, so there is a lower limit to the value that can be set as the set speed. Depending on the vehicle type, the lower limit of the set speed is often around 30 km / h. On roads where the designated maximum speed is set to less than 30 km / h, such as narrow residential streets or parking lots, even if the designated maximum speed is obtained, it cannot be reflected in the set speed. In this case, the speeding notification device 10 according to this invention rejects the reflection of the designated maximum speed as the set speed. Here, rejection can mean either not changing the set speed at all, or setting it to the lower limit of the settable range, although it cannot be set to the designated maximum speed, but the latter is safer. For example, if the lower limit of the set speed range that the vehicle control unit 20 of automobile 1 can control is 30 km / h, and when entering a residential street with a speed limit of 20 km / h from a national highway with a speed limit of 60 km / h, and the reflection of the set speed is rejected, it is preferable to allow the setting to be changed to 30 km / h, but not to change it to 20 km / h. In this case, it is advisable to change the set vehicle speed while notifying the user via voice or other means that a value different from the road speed limit will be reflected in the set speed. On the other hand, the setting speed will also be rejected if it exceeds the upper limit of the controllable set speed range. For example, if the image recognition unit 32 misrecognizes a value due to dirt on a road sign or the presence of an obstacle, or if there is a problem reading data from the map information DB 34, causing the system to mistakenly identify the speed limit as 200 km / h, then the setting change will be rejected as long as the set speed range that the vehicle 1 can control is up to the maximum legal speed plus the error.

[0033] Regardless of the form of rejection described above, the speed limit notification device 10 according to this invention executes a setting change impossible notification unit 29, which notifies the user of the rejection of the setting speed via voice from the voice unit 43. The content of the voice may be a synthesized sound such as an error sound, a synthesized voice reading, or a recorded voice explanation. However, a short notification sound is preferable as it is less bothersome.

[0034] Furthermore, the speeding notification device 10 according to this invention may execute a setting change-disabled display unit 28 that displays a rejection on the optical display unit 42 when a rejection occurs. The method for displaying the rejection here is not particularly limited and may include displaying a light dot or characters or icons indicating rejection around the designated maximum speed displayed on the designated maximum speed display unit 22 or the set speed displayed on the execution limit speed display unit 23, or changing the display pattern by flashing the numerical display of the designated maximum speed or set speed.

[0035] The speeding notification device 10 according to this invention stops the notification of a rejection sound, which notifies the driver that the change of the set speed has been rejected, while the speeding warning sound, which is an audio notification of speeding by the speeding warning unit 26, is playing. An example of the priority relationship between the speeding warning sound and the rejection sound in this time series is shown in Figure 3. The horizontal axis is time t, and the vertical axis is arranged in order of whether or not the conditions for playing the rejection sound and the speeding warning sound are met, and the sounds that are actually played. When the conditions for playing the rejection sound are met, the first condition is met, which coincides with the condition for playing the speeding warning sound, so only the speeding warning sound is played without playing the rejection sound. For the driver, the speeding that the speeding warning sound should notify is more important than the fact that the reflection of the set speed has been rejected, and if the rejection sound is added on top of this, it will only add to the driver's annoyance. Therefore, while the speeding warning sound is playing, the notification is stopped and the rejection sound is not emitted to prevent it from overlapping.

[0036] Furthermore, it is preferable that the speeding notification device 10 according to this invention stops notifying the rejection sound even after the speeding warning sound has finished sounding, as long as a predetermined time tr has not elapsed. An example of this is shown in Figure 3 when the second condition of the rejection sound sounding conditions is met. This is because if the rejection sound is emitted immediately after the driver has thought that the speeding warning sound has finally finished and felt relieved, it may be excessively annoying for the driver. Here, the predetermined time is preferably 200ms to 800ms. This is because it is thought that after waiting for this amount of time, the driver will be able to listen to the notification with a certain degree of composure.

[0037] In Figure 3, when the conditions for sounding the rejection tone are met, the third condition does not overlap with the conditions for sounding the speeding warning tone, and the predetermined time tr has also elapsed. Therefore, in this case, the rejection tone is sounded as is.

[0038] Furthermore, as shown when the fourth condition is met in the conditions for sounding the rejection sound in Figure 3, if the vehicle exceeds the speed limit while the rejection sound from the setting change impossible notification unit 29 is sounding, and the conditions for sounding the speeding warning sound are met, it is preferable to quickly stop the rejection sound and sound the speeding warning sound. This situation is shown on the right side of Figure 3. This prevents the speeding warning sound and the rejection sound from overlapping. For example, if the vehicle unintentionally exceeds the set speed limit on a slope or elsewhere while the rejection sound is being used for notification, the speeding warning should take precedence over the rejection notification.

[0039] Furthermore, it is preferable that the optical display unit 42 continues to display the fact that the setting change is not possible on the display unit 28 even while the rejection sound is stopped, so that the driver can calmly confirm that the setting has been rejected without being bothered by overlapping sounds.

[0040] A flowchart of an embodiment of an automobile 1 having the speeding notification device according to this invention will be explained with reference to Figures 4 and 5. The vehicle control unit 20 processes each function in parallel as soon as the ignition is turned on or driving begins, thereby realizing the speeding notification device according to this invention as a whole.

[0041] First (S201), when the vehicle 1 starts moving (S202), the vehicle control unit 20 executes the functions related to the execution speed limit display unit 23 (S210 group), the functions related to the input unit 41 and the vehicle speed reflection unit 40 (S220 group), and the functions related to speeding of the speeding warning unit 26 and the speeding display unit 27 (S230 group) in parallel using multitasking.

[0042] Of these, the functions related to the execution speed limit display unit 23 (S210 group) execute the maximum speed information acquisition unit 21, which acquires the designated maximum speed of the road being traveled from the car navigation system's map information database 34 and camera 31 (S211). It determines whether the acquired designated maximum speed is different from the designated maximum speed currently held by the vehicle control unit 20 and displayed on the designated maximum speed display unit 22 (S212). If they are different (S212 → Yes), the designated maximum speed display is updated (S213). This is continuously executed.

[0043] In the parallel-executed functions related to the input unit 41 and the setting reflection unit 40 (S220 group), a function is executed to determine whether to reflect or reject the acquired set speed. The system continuously waits for the input unit 41 (described as a switch in the flow as an example), which is a switch or button that reflects the set speed, to be turned on (S221 → No). When the input unit 41 is turned on (S221 → Yes), the system compares the currently set vehicle speed with the maximum speed information acquired in S210 group to determine whether to reflect and update it (S222). If the conditions are not for rejection (S222 → Yes), the setting speed is reflected (S222 → Yes → S223), and the system continues to wait for the input unit 41 to be turned on (S221). On the other hand, if the conditions are for rejection, the system executes the function related to whether or not to sound the next rejection sound (S240 group).

[0044] The function related to whether or not to sound the rejection tone (S240 group) performs the following functions in parallel with the function related to the setting reflection unit 40. If the conditions for rejection in S222 are met (S222 → Yes), processing is performed to avoid overlap or continuation with the speeding warning tone. If the speeding warning tone is currently sounding (S241 → Yes), the sounding of the speeding warning tone takes precedence, so the notification by the rejection tone is stopped and not made (S246). Also, even if the speeding warning tone is not in progress (S241 → No), if a predetermined time tr has not elapsed since the tone ended (S242 → Yes), the notification of the rejection tone is stopped to avoid continuation of notifications, i.e., no notification is made in this case (S246). If the speeding warning tone is not in progress, and a predetermined time tr has elapsed since the last speeding warning tone ended, the load on the driver is considered not to be a problem, so the rejection tone is sounded (S243).

[0045] If the conditions for sounding the speeding warning sound are met while the reject sound is being played (S244→Yes), then the reject sound is stopped to avoid overlap with the speeding warning sound (S246). If the conditions for sounding the speeding warning sound are not met (S245→No), and the set duration for sounding the reject sound has ended (S244→No), then the reject sound is stopped as set (S246).

[0046] Furthermore, the speed-related functions of the speed-over warning unit 26 and speed-over display unit 27, which are executed in parallel (S230 group), continuously monitor whether the driving speed exceeds the set vehicle speed (S231 → No). If the driving speed exceeds the set vehicle speed (S231 → Yes), the response is switched depending on whether a predetermined time has elapsed since the setting speed was reflected (S232). If the predetermined time has not elapsed (S232 → No), it is determined that the speed overrun is due to the reflection of the set speed, so the warning sound is withheld and only the speed-over display unit 27 displays a warning (S233). This visual-only display continues until a certain period of time has elapsed (S234 → No → S235 → Yes). If the speed-over condition is resolved during that time (S235 → No, corresponding to S123), the warning display is canceled (S238). On the other hand, if the speeding condition continues for a certain period of time (S234 → Yes), it is necessary to raise the warning level to the driver, so the reservation is released and a warning sound is generated from the speeding warning unit 26 (S236). At this time, if a reject sound was emitted in the parallel processing of the S240 group, the condition of S245 is met.

[0047] On the other hand, if the driving speed exceeds the set speed, and a predetermined time has already elapsed since the set speed was reflected (S232 → Yes), it is determined that this exceedance is not intentional due to the reflection of the set speed, and a warning sound is emitted from the speed limit warning unit 26 without reservation (corresponding to S236 and S125). In this case as well, if a reject sound was emitted in the parallel processing of the S240 group, the condition of S245 is met.

[0048] In any case, once a warning sound is generated, this continues as long as the overspeed state persists (S237→Yes). When the overspeed state is resolved (S237→No), the warning sound is stopped (S238). If the warning display on the overspeed display unit 27 has also persisted up to this point, the warning display is also cancelled.

Explanation of Signs

[0049] 1 Automobile 10 Overspeed notification device 20 Vehicle control unit 21 Maximum speed information acquisition unit 22 Specified maximum speed display unit 23 Execution limit speed display unit 24 Speed display unit 25 Setting change notification unit 26 Overspeed warning unit 27 Overspeed display unit 28 Setting change disable display unit 29 Setting change disable notification unit 30 Light point 31 Camera 32 Image recognition unit 33 Position information acquisition unit 34 Map information database 35 Road information unit 37 Vehicle speed sensor 40 Setting reflection unit 41 Input unit 42 Optical display unit 43 Sound part

Claims

1. A maximum speed information acquisition unit that acquires the designated maximum speed of the road on which the vehicle is traveling, A vehicle control unit that controls the vehicle according to a set speed within a preset speed range, A setting reflection unit that reflects the specified maximum speed in the set speed, A setting change rejection notification unit that provides an audible notification when the aforementioned setting speed change is rejected, A speed limit warning unit that notifies the driver by voice when the driving speed exceeds the set speed, It has, When the specified maximum speed is less than the lower limit or greater than the upper limit of the set speed range, the setting reflection unit rejects the reflection, A speed limit notification device that stops the notification of a rejection sound from the setting change inability notification unit while the speed limit warning sound from the speed limit warning unit is sounding.

2. The speed limit notification device according to claim 1, wherein the notification of a rejection sound by the setting change invalid notification unit is stopped while a predetermined time has not elapsed since the speed limit warning sound has finished sounding.

3. The speed limit notification device according to claim 1, wherein when the driving speed exceeds the set speed while the setting change impossible notification unit has issued a rejection sound, the speed limit warning sound is sounded first.

Images