JP6875107B2 - In-vehicle information terminal - Google Patents

Description

The present invention relates to an in-vehicle information terminal.

Conventionally, an information terminal that is mounted on a vehicle such as an automobile and notifies a driver of road traffic information around the own vehicle, information on the running state of the own vehicle, and the like has been known. The in-vehicle information terminal is provided, for example, on a dashboard near the driver's seat in the vehicle interior or on a rear-view mirror provided in the vehicle. Therefore, the driver of the vehicle can check the information displayed on the display of the in-vehicle information terminal and can confirm the sound output from the in-vehicle information terminal without significantly looking away from the front while driving.

The information notified by the in-vehicle information terminal varies depending on the function of the terminal. Some of the currently known in-vehicle information terminals approach an area including a road whose maximum traveling speed of the vehicle is regulated to a relatively low speed (for example, 30 km / h) (hereinafter referred to as "speed regulated area"). There is something to notify. The in-vehicle information terminal having a function of notifying the approach to the speed regulation area stores the position information of each area and performs the notification by comparing the position information with the current position. FIG. 10 is a conceptual diagram showing an example of a speed control area on a map and a circle surrounding the area. The position information of the speed regulation area shown by hatching in FIG. 10 is represented by the center position o and the radius r of the circle C surrounding the speed regulation area, the center position o is represented by the latitude and longitude, and the radius r is the distance. expressed.

The in-vehicle information terminal notifies that there is a speed regulation area near the current position when the vehicle enters any of the circles surrounding the stored speed regulation area. In addition, the in-vehicle information terminal ends the notification when the vehicle deviates from the circle. However, the inside of the circle surrounding the speed-regulated area includes not only the speed-controlled area but also the roads around which the maximum speed is not regulated to a low speed. Therefore, the content that the in-vehicle information terminal can notify is limited to the speed regulation area near the current position, and cannot notify that the vehicle has entered the speed regulation area.

As described above, in the data format in which the position information of the speed regulation area is specified by the center position and the radius of the circle, the positional relationship between the current position of the vehicle and the speed regulation area cannot be determined with high accuracy. Further, it is not possible to superimpose the speed regulation area on the map displayed on the display of the in-vehicle information terminal.

An object of the present invention is to provide an in-vehicle information terminal capable of controlling notification based on the result of determining the positional relationship between the current position of a vehicle and a predetermined area on a map with high accuracy.

In order to achieve the above object, the present invention provides the following aspects.
(1) An in-vehicle information terminal mounted on a vehicle.
A positioning unit that positions the current position of the vehicle and
A notification unit that performs notification using at least one of image, light, and sound,
A first storage unit that stores the position and shape of a predetermined area on the map in polygon format data,
A second storage unit that stores the position of the predetermined area inherent in the circle by the center position and radius of the circle, and
A control unit that controls notification by the notification unit based on the relationship between the current position and the information stored in the first storage unit and the second storage unit is provided.
The control unit
When the current position is not inherent in the predetermined area indicated by the information of the first storage unit and the current position is inherent in the circle indicated by the information of the second storage unit, the center position of the circle is the predetermined area. If it is inherent in, the notification by the notification unit is suppressed, and the notification is suppressed.
When the current position is not inherent in the predetermined area indicated by the information of the first storage unit and the current position is inherent in the circle indicated by the information of the second storage unit, the center position of the circle is the predetermined area. An in-vehicle information terminal that allows the notification unit to perform notification in the second form if it is not inherent in the information terminal.

(2) The in-vehicle information terminal according to (1) above.
The control unit is an in-vehicle information terminal that permits the notification in the first form by the notification unit when the current position is included in a predetermined area indicated by the information in the first storage unit.

(3) The in-vehicle information terminal according to (2) above.
The notification in the first form displays an image showing a predetermined area indicated by the information of the first storage unit and an image indicating that the current position is within the predetermined area on a map around the current position. In-vehicle information terminal including.

( 4 ) The in-vehicle information terminal according to any one of (1) to (3) above.
The notification in the second form is an in-vehicle information terminal including the display of an image indicating that the predetermined area is in the vicinity of the current position.

( 5 ) The in-vehicle information terminal according to any one of (1) to ( 4) above.
The predetermined area is an in-vehicle information terminal that includes a road in which the maximum traveling speed of the vehicle is regulated to a predetermined speed.

According to the aspect (1) above, when the predetermined area indicated by the information of the first storage unit exists in the circle indicated by the information of the second storage unit, the current position of the vehicle is the information of the second storage unit. Although it is within the indicated circle, if it is outside the predetermined area indicated by the information in the first storage unit, the notification by the notification unit is suppressed. In this way, it is possible to control whether or not to perform notification based on the result of determining the positional relationship between the current position of the vehicle and the predetermined area on the map with high accuracy.
Further, when the second storage unit stores the information of a specific predetermined area but the first storage unit does not store the information, the current position of the vehicle includes the specific predetermined area indicated by the information of the second storage unit. If it is within a circle, the notification is performed in the second form, so that notification is possible even when the positional relationship cannot be determined with high accuracy.

According to the aspect (2) above, if the current position of the vehicle is within the predetermined area indicated by the information in the first storage unit, the notification is performed in the first form, based on the highly accurate determination result of the positional relationship. Notification is possible.

According to the aspect (3) above, the notification in the first form is performed by displaying an image showing a predetermined area on the map and displaying an image indicating that the current position is within the predetermined area. It is possible to accurately notify the highly accurate determination result of the relationship.

According to the aspect ( 4 ) above, the notification in the second form is performed by displaying an image indicating that there is a predetermined area in the vicinity of the current position, so that the notification based on the rough determination result of the positional relationship is possible. Is.

According to the aspect ( 5 ) above, the driver performs driving at a reduced speed in accordance with the notification based on the positional relationship with the area including the road where the maximum traveling speed of the vehicle is regulated to a predetermined speed. It is possible to secure safe passage for pedestrians and the like inside.

It is the schematic which shows one arrangement example of the radar detector of one Embodiment provided in the vehicle interior. It is the schematic which shows the other arrangement example of the radar detector of one Embodiment provided in the vehicle interior. It is a block diagram which shows the internal structure of the radar detector shown in FIG. 1 and FIG. It is a conceptual diagram which shows an example of the speed regulation area on a map, and the shape of the area represented by the data of polygon format. It is a block diagram which shows the internal structure of the control part for performing the control related to a notification based on the positional relationship between a current position and a speed regulation area. It is a flowchart which shows an example of the processing flow performed by the notification processing unit of a control unit. It is a conceptual diagram which shows an example of a speed regulation area on a map, and the positional relationship of a vehicle with respect to a circle surrounding the area. It is a figure which shows the example of the notification screen which is displayed on the display. It is a flowchart which shows another example of the processing flow performed by the notification processing unit of a control unit. It is a conceptual diagram which shows an example of a speed regulation area on a map, and a circle surrounding the area.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, a radar detector will be described as an example of the vehicle-mounted information terminal according to the present invention. The radar detector has a function of issuing a warning or the like to encourage speed compliance in order to comply with the speed limit of a vehicle such as an automobile.

FIG. 1 is a schematic view showing a radar detector of one embodiment provided in a vehicle interior. As shown in FIG. 1, the radar detector 100 of the present embodiment is provided in a state where a bracket fixed by a double-sided tape or the like is held on the upper surface of the dashboard DB of the vehicle. As shown in FIG. 2, the radar detector 100 may be a mirror type that is sandwiched and fixed above and below the rearview mirror RM provided in the vehicle. It should be noted that FIGS. 1 and 2 are viewed in the direction of the reference numerals, and the front / rear, left / right, and up / down are according to the direction seen from the driver. , The upper part is shown as U, and the lower part is shown as D.

FIG. 3 is a block diagram showing an internal configuration of the radar detector 100 shown in FIGS. 1 and 2. As shown in FIG. 3, the radar detector 100 includes a radar wave detection unit 101, a GPS (Global positioning system) reception unit 103, an acceleration sensor 105, a gyro sensor 107, a pressure sensor 109, and a map data memory 110. It has a point format data memory 111, a display 113, a speaker 115, a primary storage memory 117, and a control unit 119. Power is supplied to the radar detector 100 via a power cable (not shown) connected to the DC power system of the vehicle.

Hereinafter, each component of the radar detector 100 will be described.

The radar wave detection unit 101 detects radar waves emitted from a radar type speed measuring device, an automatic speed violation control device, or the like. Further, the radar wave detection unit 101 detects the detected radar wave and sends the radar wave detection signal to the control unit 119. The GPS receiving unit 103 receives radio waves from GPS satellites. The signal represented by the radio wave received by the GPS receiving unit 103 is sent to the control unit 119.

The acceleration sensor 105 detects the traveling acceleration of the vehicle equipped with the radar detector 100. A signal indicating the acceleration detected by the acceleration sensor 105 is sent to the control unit 119. The gyro sensor 107 detects the rotational angular velocity of the vehicle equipped with the radar detector 100. A signal indicating the angular velocity detected by the gyro sensor 107 is sent to the control unit 119. The barometric pressure sensor 109 detects the barometric pressure around the radar detector 100. A signal indicating the atmospheric pressure detected by the atmospheric pressure sensor 109 is sent to the control unit 119.

The map data memory 110 stores road map data of all over Japan and polygon-format data indicating the position and shape of the speed control area on the map. The speed-regulated area is a predetermined area on a map including a road whose maximum traveling speed of a vehicle is regulated to a relatively low speed (for example, 30 km / h), and is called a "zone 30" or the like. FIG. 4 shows an example of the speed regulation area on the map and the shape of the area represented by the polygon format data. In the example shown in FIG. 4, the speed regulation area is represented by a hatched area, and the dotted line indicates the shape of the speed regulation area represented by the polygon format data. One speed regulation area is composed of an aggregate of a plurality of polygons, and each polygon is represented by the position information of the starting point and the data in vector format.

The point format data memory 111 stores point format data indicating the position of the speed regulation area on the map by the center position o and the radius r of the circle C surrounding the speed regulation area shown in FIG. The circle C includes a speed-regulated area, but also includes a road whose maximum speed is not regulated to a low speed, and does not match the shape of the speed-regulated area. Further, the point format data memory 111 stores road traffic information at positions corresponding to latitude and longitude throughout Japan and speed limit information of each road of expressways and general roads. "Road traffic information" is a loop coil equipped with a fixed radar type, speed measuring machine (measuring camera), speed warning board as a speed violation control machine (Orbis), and a camera and a loop sensor as a measuring sensor. The type, "NH system", stealth type, photoelectric tube type and infrared type measurement sensors are used to measure the time the vehicle passes a certain section to determine the running speed, and the mobile type is a patrol car. It refers to information indicating the signal and installation position of radar-type enforcement machines, etc., which are loaded on the roof of the vehicle.

The display 113 displays a notification screen, a warning screen, a standby screen, etc. of the radar detector 100. The speaker 115 outputs, for example, voices such as operation sounds of switches (not shown), warnings, and notifications. The primary storage memory 117 is a cache memory that temporarily stores data such as an image to be displayed on the display 113.

The control unit 119 gives a warning using the display 113 and / or the speaker 115 in response to the detection signal from the radar wave detection unit 101. That is, when the radar wave detection unit 101 detects the radar wave, the control unit 119 displays a warning screen on the display 113 indicating that the radar wave is cracking down, and controls the speaker 115 to output the warning sound. .. Further, the control unit 119 calculates the traveling speed of the vehicle equipped with the radar detector 100 based on the time change of the signal from the GPS receiving unit 103 or the signal from the acceleration sensor 105. The control unit 119 calculates the traveling speed to a positive value even when the vehicle is moving backward. Further, the control unit 119 positions the current position of the vehicle equipped with the radar detector 100 based on the signal from the GPS receiving unit 103. The control unit 119 acquires road traffic information or speed limit information related to the current position from the point format data memory 111, and then uses the display 113 and / or the speaker 115 to issue a warning according to the acquired information.

Further, the control unit 119 notifies using the display 113 and / or the speaker 115 based on the relationship between the current position of the vehicle and each information regarding the speed control area stored in the map data memory 110 and the point format data memory 111, respectively. Control. FIG. 5 is a block diagram showing an internal configuration of the control unit 119 for performing control related to notification based on the positional relationship between the current position and the speed regulation area. As shown in FIG. 5, the control unit 119 includes a current position positioning unit 151, a first internal determination unit 153, a second internal determination unit 155, a display processing unit 157, and a notification processing unit 159. Hereinafter, each component of the control unit 119 shown in FIG. 5 will be described.

The current position positioning unit 151 positions the current position of the vehicle equipped with the radar detector 100 based on the signal from the GPS receiving unit 103. Information indicating the current position positioned by the current position positioning unit 151 is sent to the first internal determination unit 153, the second internal determination unit 155, and the display processing unit 157.

The first intrinsic determination unit 153 reads polygon format data indicating the speed regulation area around the current position from the map data memory 110, and whether the current position is inherent in any one of the speed regulation areas indicated by the read data. Determine if not. The first intrinsic determination unit 153 sends the determination result to the notification processing unit 159. Further, the first internal determination unit 153 sends polygon format data indicating the speed regulation area determined that the current position is internal to the display processing unit 157.

The second intrinsic determination unit 155 reads the point format data indicating the speed regulation area around the current position from the point format data memory 111, and currently forms at least one circle surrounding the speed regulation area indicated by the read data. Determine if the position is inherent. The second intrinsic determination unit 155 sends the determination result to the notification processing unit 159. In addition, the second internal determination unit 155 sends data indicating the center position of the circle determined that the current position is internal to the notification processing unit 159.

The display processing unit 157 reads data indicating a road map around the current position from the map data memory 110, and performs processing for displaying the map on the display 113. Further, when the display processing unit 157 obtains polygon format data indicating the speed regulation area from the first intrinsic determination unit 153, the display processing unit 157 performs a process for displaying the speed regulation area on the display 113 by superimposing it on the map. .. Further, the display processing unit 157 performs a process for displaying on the display 113 a character for notification determined by the notification processing unit 159, an image such as an icon or a mark, and the like.

Whether or not the notification processing unit 159 performs notification using the display 113 and / or the speaker 115 based on the discrimination result obtained from the first internal discrimination unit 153 and the discrimination result obtained from the second internal discrimination unit 155. And decide the content of the notification when the notification is performed. FIG. 6 is a flowchart showing the flow of processing performed by the notification processing unit 159. As shown in FIG. 6, the notification processing unit 159 determines whether or not the current position is inherent in the speed regulation area based on the polygon format data based on the determination result obtained from the first intrinsic determination unit 153 (). Step S101), if it is inherent, the process proceeds to step S103, and if it is not inherent, the process proceeds to step S105. The positional relationship between the vehicle equipped with the radar detector 100 and the speed control area when the process proceeds to step S103 is equal to the positional relationship between the vehicle A shown in FIG. 7 and the hatched speed control area.

In step S103, the notification processing unit 159 superimposes the speed regulation area on the map displayed on the display 113, displays on the display 113 that the vehicle is in the speed regulation area, and makes a voice from the speaker 115. Determine to output. A display example of the display 113 at this time is shown in FIG. 8 (a). On the other hand, in step S105, the notification processing unit 159 determines whether or not the current position is inherent in the circle surrounding the speed regulation area based on the point format data based on the determination result obtained from the second intrinsic determination unit 155. If it is present, the process proceeds to step S107, and if it is not present, the process returns to step S101. In step S107, the notification processing unit 159 determines whether or not the center position of the circle determined to have the current position in step S105 is within the speed regulation area indicated by the polygon format data stored in the map data memory 110. to decide.

The positional relationship between the vehicle equipped with the radar detector 100 and the speed control area when it is determined to be inherent in step S107 is equal to the positional relationship between the vehicle B shown in FIG. 7 and the hatched speed control area. When it is determined in step S107 that it is inherent, the notification processing unit 159 suppresses the notification using the display 113 and / or the speaker 115 by ending a series of processes. On the other hand, if it is determined in step S107 that the vehicle is not present, the process proceeds to step S109, and the notification processing unit 159 displays a map, displays on the display 113 that the vehicle is near the speed regulation area, and outputs voice from the speaker 115. Then decide. A display example of the display 113 at this time is shown in FIG. 8 (b).

The above description is based on the premise that the map data memory 110 does not always store all of the speed control areas stored in the point format data memory 111, but the point format data memory 111 stores them. If the map data memory 110 stores the polygon format data of all the speed control areas, the notification processing unit 159 may perform processing according to the flowchart shown in FIG. The notification processing unit 159 according to the flowchart shown in FIG. 9 determines whether or not the current position is inherent in the circle surrounding the speed regulation area based on the point format data based on the determination result obtained from the second intrinsic determination unit 155. (Step S201), if it exists, the process proceeds to step S203, and if it does not exist, the process returns to step S201. In step S203, the notification processing unit 159 determines whether or not the current position is inherent in the speed regulation area based on the polygon format data based on the determination result obtained from the first intrinsic determination unit 153, and if it is present. The process proceeds to step S205, and if it does not exist, a series of processes is terminated. In step S205, the notification processing unit 159 superimposes the speed regulation area on the map displayed on the display 113 and displays that the vehicle is in the speed regulation area, as in step S103 of FIG. It is determined that the sound is output from the speaker 115.

As described above, according to the present embodiment, when the hatching speed regulation area stored in the map data memory 110 exists in the circle C surrounding the speed regulation area stored in the point format data memory 111 shown in FIG. In, as shown in the vehicle (B) of FIG. 7, when the current position is within the circle C based on the point format data but outside the hatched speed regulation area based on the polygon format data, the display 113 And / or notification using the speaker 115 is suppressed. After that, as shown in the vehicle (A) of FIG. 7, when the current position is within the hatched speed control area based on the polygon format data, the display 113 and / or the speaker 115 is used for notification. At this time, the display 113 displays an image showing the speed regulation area on the map and a message indicating that the current position is within the speed regulation area. In this way, even if point format data and polygon format data coexist for the same speed regulation area, notification is made based on the result of highly accurate determination of the positional relationship between the current position of the vehicle and the speed regulation area on the map. It is possible to control whether or not to perform. In addition, when performing notification, it is possible to display an accurate and easy-to-understand display for the user.

However, if the polygon format data corresponding to the speed regulation area stored in the point format data memory 111 is not stored in the map data memory 110, the display 113 and / or when the vehicle enters the circle based on the point format data. Since the notification is performed using the speaker 115, it is possible to perform notification based on the conventional rough determination result of the positional relationship.

In many cases, the interval at which the point format data memory 111 is updated and the interval at which the map data memory 110 is updated are different. That is, since the point format data is represented by the center position and the radius, it is easy to create or change new data as compared with the polygon format data stored in the map data memory 110. Therefore, the update interval of the point format data memory 111 is often shorter than the update interval of the map data memory 110. As a result, a situation occurs in which the map data memory 110 does not have a speed regulation area registered in the point format data memory 111. However, for such a speed regulation area, the above-mentioned conventional positional relationship is roughly defined. Notification is performed based on the discrimination result.

The present invention is not limited to the above-described embodiment, and can be appropriately modified, improved, and the like. For example, in the above embodiment, the radar detector 100 has been described as an example of the vehicle-mounted information terminal according to the present invention, but the vehicle-mounted information that displays the standby screen on the display except when displaying specific information by the main function. The terminal is not limited to the radar detector 100, and may be, for example, a drive recorder provided with a display.

100 Radar detector 101 Radar wave detector 103 GPS receiver 105 Accelerometer 107 Gyro sensor 109 Pressure sensor 110 Map data memory 111 Point format data memory 113 Display 115 Speaker 117 Primary storage memory 119 Control unit 151 Current position Positioning unit 153 First Internal determination unit 155 Second internal determination unit 157 Display processing unit 159 Notification processing unit DB Dashboard RM Room mirror

Claims (5)

An in-vehicle information terminal mounted on a vehicle
A positioning unit that positions the current position of the vehicle and
A notification unit that performs notification using at least one of image, light, and sound,
A first storage unit that stores the position and shape of a predetermined area on the map in polygon format data,
A second storage unit that stores the position of the predetermined area inherent in the circle by the center position and radius of the circle, and
A control unit that controls notification by the notification unit based on the relationship between the current position and the information stored in the first storage unit and the second storage unit is provided.
The control unit
When the current position is not inherent in the predetermined area indicated by the information of the first storage unit and the current position is inherent in the circle indicated by the information of the second storage unit, the center position of the circle is the predetermined area. If it is inherent in, the notification by the notification unit is suppressed, and the notification is suppressed.
When the current position is not inherent in the predetermined area indicated by the information of the first storage unit and the current position is inherent in the circle indicated by the information of the second storage unit, the center position of the circle is the predetermined area. An in-vehicle information terminal that allows the notification unit to perform notification in the second form if it is not inherent in the information terminal. The in-vehicle information terminal according to claim 1.
The control unit is an in-vehicle information terminal that permits the notification in the first form by the notification unit when the current position is included in a predetermined area indicated by the information in the first storage unit. The in-vehicle information terminal according to claim 2.
The notification in the first form displays an image showing a predetermined area indicated by the information of the first storage unit and an image indicating that the current position is within the predetermined area on a map around the current position. In-vehicle information terminal including. The in-vehicle information terminal according to any one of claims 1 to 3.
The notification in the second form is an in-vehicle information terminal including the display of an image indicating that the predetermined area is in the vicinity of the current position. The in-vehicle information terminal according to any one of claims 1 to 4.
The predetermined area is an in-vehicle information terminal that includes a road in which the maximum traveling speed of the vehicle is regulated to a predetermined speed.

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