JP2009058439A - On-vehicle navigation device and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle navigation device and program capable of omitting operation for registering a switching point to side video. <P>SOLUTION: This on-vehicle navigation device 1 is connected to an imaging device 2 for imaging the front side part of a vehicle and an antenna 3 for GPS (Global Positioning System) reception. A processing section 14, when receiving switching operation with an operation receiving section 22, switches the road map screen displayed on a display section 20 to the side video provided from the imaging device 2 via a video input section 21, and stores, as a switch registration point, in a DRAM (Dynamic Random Access Memory) 19, the travel position of the vehicle detected by the processing section 14 based on the signal received by a GPS receiving section 11 via an antenna 3 and a signal from a gyro sensor 12. When the travel position detected during the travel of the vehicle is in a predetermined range from the switch registration point stored in the DRAM 19, the processing section 14 switches the road map screen displayed on the display section 20 to the side video. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an in-vehicle navigation device and a program for switching between a road map screen and a side image.

  FIG. 16 is a schematic plan view for explaining the operation of the conventional vehicle side monitoring apparatus. FIG. 17 is a schematic diagram illustrating an example of a side image displayed on a display unit of a conventional vehicle side monitoring apparatus. Conventionally, as shown in FIG. 16, the vehicle 101 enters the intersection where there is a shielding object 102 on the side of the vehicle 101 and the visibility is poor and the driver cannot easily recognize the other vehicles 103 and 104 traveling on the intersection. In order to make it possible to recognize the other vehicles 103 and 104 at an early timing, an imaging unit is provided at the front of the vehicle 101, and the display unit installed in the driver's seat as shown in FIG. There has been proposed a vehicle side monitoring apparatus that displays a left side image and a right side image on the front side of the vehicle.

  The vehicle side monitoring device is installed in an image pickup unit that picks up a side image with a certain range of field of view on each of the front left and right sides of the vehicle, and a place that is located in the driver's seat of the vehicle and is visible to the driver A display unit that displays a side image, a position detection unit that detects a driving position known as a car navigation system including a GPS (Global Positioning System), a changeover switch, and a changeover switch indicating the driving position. And a control unit that switches to either a road map screen or a side image and displays it on the display unit.

  Since such a vehicle side monitoring device requires a side image in a limited place where it is about to enter an intersection with poor visibility, a road map screen and a side are conventionally displayed on one display unit. One of the video images was switched and displayed. However, in the conventional vehicle side monitoring device, in order to display the side image, manual operation of the changeover switch is required when the driver determines that he or she is about to go to a place that requires side monitoring. In the case of traveling on an intricate road and traveling on a road that frequently passes during commuting or the like, frequent operation of the changeover switch is required, which causes annoyance to the driver.

The vehicle side monitoring device described in Patent Document 1 allows a driver to register a location where a side image needs to be displayed in advance, so that a manual operation of a changeover switch is performed when the vehicle approaches the corresponding location. Switch to side view without needing.
JP-A-8-293098

  However, the point where the line of sight is poor and the switching to the side image is often determined by the user when the driver actually drives the vehicle and approaches an intersection or the like where the line of sight is poor. Therefore, in the vehicle side monitoring device described in Patent Document 1, when the vehicle first approaches the point where the side image should be displayed, the driver manually operates the changeover switch to switch to the side image. After passing through the point while visually recognizing the video, there is a problem that it is necessary to find and register the point from the stored map information.

  In addition, at the point where the driver determines that the prospect is poor, the situation where the prospect is not always generated does not always occur, and the situation where the prospect is poor may change depending on the surrounding situation. However, since the vehicle side monitoring device described in Patent Document 1 is switched to the side image at the registration point regardless of the surrounding situation, it is unnecessary even when a poor-looking state does not occur. There is a problem that the driver feels bothered by switching.

  Further, the vehicle side monitoring device described in Patent Document 1 is used when a plurality of roads intersect and a side image is required to enter a specific road at an intricate intersection. Regardless of the road to be switched, since the switching to the side image is performed at the registration point, there is a problem that the switching is performed even when entering a road different from the specific road.

  Occurrence of poor visibility at the same point may vary depending on the season, holidays and holidays. For example, at a junction that joins a main road, even if the outlook is good on weekdays, the traffic volume may increase on holidays and holidays, resulting in a poor outlook. However, the vehicle side monitoring device described in Patent Document 1 has a problem that it cannot be switched to a side image based on calendar information.

  Occurrence of poor visibility changes depending on the time of day. For example, at a confluence point that joins a main road, there is a case where the traffic volume increases in a commuting time zone and a commuting time zone, resulting in a poor prospect. In addition, when a poor-looking condition occurs, it is not always optimal to switch to the side image, for example, sunlight having high light intensity is directly incident on the imaging unit depending on the traveling position in the early morning and evening, It is better that the image pickup unit cannot optimize image adjustment such as white balance, and the other vehicle is not displayed in the side image even when the other vehicle is approaching, and it is not switched to the side image. There is a case. However, the vehicle side monitoring device described in Patent Document 1 has a problem that it cannot be switched to a side image based on a time zone or time.

  The occurrence of an unforeseeable state varies depending on the temperature outside the vehicle, that is, the outside temperature. For example, at an intersection where a curve mirror (road reflector) that reflects the blind spot to the driver is installed, the driver enters the intersection while viewing the image on the curve mirror. Although a side image is not normally required, when the temperature is lowered, a side image may be required without condensation on the mirror surface and showing a blind spot on the curved mirror. However, the vehicle side monitoring device described in Patent Document 1 has a problem that it cannot be switched to a side image based on the outside air temperature.

  Occurrence of poor visibility changes depending on the weather. For example, there is an intersection where a poor visibility occurs in rainy weather. However, the vehicle side monitoring device described in Patent Document 1 has a problem that it cannot be switched to a side image based on weather information indicating the weather.

  The present invention has been made in view of such circumstances, and when a driver manually operates a changeover switch to switch to a side image, the driving position is detected and registered as a switching registration point. It is an object of the present invention to provide an in-vehicle navigation device and a program that do not require a user to register a switching registration point.

  The present invention also provides a registration means for registering a road type and an approach angle acquired as information relating to a travel position in association with a switch registration point, and a switching means for switching to a side image based on the registered road type and the approach angle. By providing, it aims at providing the vehicle-mounted navigation apparatus which switches a side image only when approaching the specific road which requires the switch to a side image.

  Furthermore, the present invention includes registration means for storing road type, calendar information, time, outside temperature, and weather information as information relating to the travel position in association with the switching registration point, and switching means for switching to a side image based on these. Accordingly, an object of the present invention is to provide an in-vehicle navigation device that switches a side image in accordance with a state such as an intersection that changes every moment.

  An in-vehicle navigation device according to the present invention includes a position detection unit that detects a traveling position of a vehicle, a video input unit that inputs a side image obtained by imaging the side of the vehicle, a road map screen that shows the traveling position, and In a vehicle-mounted navigation device comprising switching means for switching to one of the side images and displaying, and acceptance means for accepting an instruction to switch to the side image, when the accepting means accepts the instruction, the travel position is Registration means for registering, and determination means for determining whether or not the travel position detected by the position detection means is within a predetermined range from the travel position registered by the registration means, the switching means, When the accepting means accepts an instruction or when the judging means judges that it is within a predetermined range, it is configured to switch to and display the side image. And wherein the door.

  When this switching operation is accepted, the in-vehicle navigation device switches the displayed road map screen to a side image obtained by imaging the front left and right sides of the vehicle, and registers the traveling position of the vehicle as a switching registration point. In addition, the in-vehicle navigation device switches the displayed road map screen to a side image when the traveling position of the vehicle is within a predetermined range from the switching registration point during traveling of the vehicle.

  The vehicle-mounted navigation device according to the present invention includes an information acquisition unit that acquires information related to the travel position detected by the position detection unit, and a storage unit that stores a plurality of switching conditions for switching to the side image according to the information. The registration means is configured to register the information in association with the travel position detected by the position detection means, and the switching condition according to the information registered in association with the travel position is When the travel condition detected by the position detection means is determined to be within a predetermined range by the switching condition acquisition means acquired from the storage means and the determination means, the information acquired by the information acquisition means is the switching condition acquisition Second determining means for determining whether or not the switching condition acquired by the means is satisfied, wherein the switching means determines that the second determining means satisfies the switching condition. If you, characterized in that are configured to display is switched to the side image.

  When registering a travel position as a switching registration point, this in-vehicle navigation device acquires information related to the road at the travel position and registers it in association with the switching registration point. The storage means stores a plurality of switching conditions for switching to a side image in accordance with information relating to the road at the travel position. The in-vehicle navigation device reads information registered in association with the switching registration point, and acquires switching conditions corresponding to the read information from a plurality of switching conditions stored in the storage unit. The vehicle-mounted navigation device switches to a side image when the travel position is within a predetermined range from the switching registration point during travel of the vehicle and the information related to the travel position during travel satisfies the acquired switching condition.

  The in-vehicle navigation apparatus according to the present invention is characterized in that the information acquisition means includes road type acquisition means for acquiring a road type related to the travel position detected by the position detection means.

  When registering a travel position as a switching registration point, this in-vehicle navigation device acquires a road type related to the travel position and registers it in association with the switching registration point. The in-vehicle navigation device reads the road type registered in association with the switching registration point, and acquires the switching condition according to the read road type from the plurality of switching conditions stored in the storage unit. The in-vehicle navigation device switches to a side image when the traveling road type satisfies the acquired switching condition while the traveling position is within a predetermined range from the switching registration point during traveling of the vehicle.

  The in-vehicle navigation device according to the present invention includes a calendar information output unit, and the information acquisition unit is configured to acquire calendar information output by the calendar information output unit.

  When registering the travel position as a switching registration point, this in-vehicle navigation device acquires the calendar information output by the calendar information output unit and registers it in association with the switching registration point. The in-vehicle navigation device reads calendar information registered in association with the switching registration point, and acquires switching conditions corresponding to the read calendar information from a plurality of switching conditions stored in the storage unit. The vehicle-mounted navigation device switches to the side image when the calendar information output by the calendar information output unit satisfies the acquired switching condition while the traveling position is within a predetermined range from the switching registration point during traveling of the vehicle.

  The in-vehicle navigation device according to the present invention includes a clock unit, and the information acquisition unit is configured to acquire a time output from the clock unit.

  When registering the travel position as a switching registration point, this in-vehicle navigation device acquires the time output by the clock unit and registers it in association with the switching registration point. The in-vehicle navigation device reads the time registered in association with the switching registration point, and acquires the switching condition corresponding to the read time from the plurality of switching conditions stored in the storage unit. The vehicle-mounted navigation device switches to a side image when the traveling position is within a predetermined range from the switching registration point during traveling of the vehicle and the acquired switching condition satisfies the time output by the clock unit.

  The in-vehicle navigation device according to the present invention includes an outside air temperature detecting unit that detects an outside air temperature, and the information acquisition unit is configured to acquire the outside air temperature detected by the outside air temperature detecting unit. .

  When registering the travel position as a switching registration point, this in-vehicle navigation device acquires the outside air temperature detected by the outside air temperature detecting means and registers it in association with the switching registration point. The in-vehicle navigation device reads the outside air temperature registered in association with the switching registration point, and acquires the switching conditions according to the read outside air temperature from the plurality of switching conditions stored in the storage unit. The in-vehicle navigation device switches to a side image when the outside air temperature detected by the outside air temperature detecting means satisfies the obtained switching condition while the traveling position is within a predetermined range from the switching registration point during traveling of the vehicle.

  The in-vehicle navigation device according to the present invention is characterized in that the information acquisition means includes weather information acquisition means for acquiring weather information.

  When registering a travel position as a switching registration point, this in-vehicle navigation device acquires weather information and registers it in association with the switching registration point. The in-vehicle navigation device reads weather information registered in association with the switching registration point, and acquires switching conditions corresponding to the read weather information from a plurality of switching conditions stored in the storage unit. The vehicle-mounted navigation device switches to a side image when the weather information acquired by the weather information acquisition means satisfies the acquired switching condition while the traveling position is within a predetermined range from the switching registration point while the vehicle is traveling.

  The in-vehicle navigation device according to the present invention is characterized in that the information acquisition means includes an entry angle acquisition means for acquiring an entry angle from the road related to the travel position to another road where the vehicle enters.

  When registering the travel position as a switching registration point, this in-vehicle navigation device acquires the entry angle and registers it in association with the switching registration point. The in-vehicle navigation device reads the approach angle registered in association with the switch registration point, and acquires the switch condition corresponding to the read approach angle from the plurality of switch conditions stored in the storage unit. The vehicle-mounted navigation device switches the acquired switching condition to the side image when the approach angle acquired by the approach angle acquisition unit satisfies the acquired switching condition while the traveling position is within a predetermined range from the switching registration point while the vehicle is traveling. .

  A program according to the present invention includes a position detection unit that detects a traveling position of a vehicle, and a video input unit to which a side image obtained by imaging the side of the vehicle is input, and a road map screen showing the traveling position; In a program for functioning an in-vehicle navigation device that switches to display one of the side images, an accepting step for accepting an instruction to switch to the side image, and when the accepting step accepts the instruction, A registration step for registration, a determination step for determining whether or not the travel position detected by the position detection means is within a predetermined range from the travel position registered by the registration step, and the reception step receives an instruction. Or when it is determined that the determination step is within a predetermined range, the switching step for switching to and displaying the side image is performed. Characterized in that to execute and.

  When receiving the switching operation, this program switches the road map screen showing the displayed traveling position to a side image, and causes the in-vehicle navigation device to function so as to register the traveling position of the vehicle as a switching registration point. Further, when the vehicle traveling position is within a predetermined range from the switching registration point during the traveling of the vehicle, the in-vehicle navigation device is caused to function so as to switch the displayed road map screen to the side image.

  In the present invention, when the vehicle is manually switched to the side image, the travel position is detected and registered as a switching registration point, thereby saving the driver from having to search for and register the switching registration point from the map information. It becomes possible.

  In addition, the present invention includes a switching means for switching to a side image based on a road type and an approach angle registered in association with a switching registration point, so that switching to a side image is performed only when entering a specific road. Can be done.

  Furthermore, the present invention is provided with switching means for switching to a side image based on road type, calendar information, time, outside air temperature, and weather information registered in association with the switching registration point, so that the state of the intersection that changes from moment to moment can be realized. It is possible to switch to the side image.

Embodiment 1
Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof. FIG. 1 is a block diagram illustrating a configuration example of the in-vehicle navigation device according to the first embodiment. In the figure, reference numeral 1 denotes an in-vehicle navigation device according to the first embodiment, which is provided at a front portion of a vehicle, such as a CCD image sensor that captures a side image having a visual field range of a certain angle on the front left and right sides of the vehicle. An imaging device 2 and a GPS (Global Positioning System) receiving antenna 3 are connected. The in-vehicle navigation device 1 includes a video input unit 21 to which a video signal related to a side image is input from the imaging device 2 and a GPS receiving unit 11 that receives a plurality of GPS radio waves via the antenna 3.

  The in-vehicle navigation device 1 includes a gyro sensor 12 that detects the attitude of the vehicle, a vehicle speed acquisition unit 15 that acquires a vehicle speed by detecting a vehicle speed pulse output from an encoder or the like provided in the vehicle, and a key group (not shown). A map information storage unit 13 including a storage medium such as an HDD (Hard Disk Drive) storing map information including road network information, and an operation reception unit 22 that receives the operation of the map and outputs an identification signal corresponding to the received operation. And a display unit 20 composed of a liquid crystal display or the like for displaying either a road map screen showing a traveling position or a side image. Further, the in-vehicle navigation device 1 includes a processing unit 14 that controls each hardware and performs various calculations.

  The processing unit 14 includes a ROM 16 in which a program 161 executed by the processing unit 14 is stored, and an SRAM (Static Random Access Memory) that stores temporary information associated with the program 161 and calculation when the program 161 is executed. 18 and a DRAM (Dynamic Random Access Memory) 19 that stores information that needs to be retained even when a power switch (not shown) provided in the in-vehicle navigation device 1 is disconnected is connected via a bus 17. Yes. The processing unit 14 functions as a position detection unit, a registration unit, a determination unit, and a switching unit in the present invention described later by reading the program 161 stored in the ROM 16 into the SRAM 18 and executing it. The operation receiving unit 22 is configured to output a switching operation signal to the processing unit 14 when a switching operation for switching the road map screen displayed on the display unit 20 by the driver to a side image is received.

  FIG. 2 is a schematic diagram illustrating an example of a road map screen. The processing unit 14 estimates the traveling position by the GPS positioning method based on the plurality of GPS radio waves received by the GPS receiving unit 11, and the estimated vehicle position and the vehicle attitude given from the gyro sensor 12 and the vehicle speed acquisition unit 15, respectively. It functions as a position detecting means by correcting the vehicle speed and detecting the travel position on the road network indicated by the map information read from the map information storage unit 13 at regular time intervals. The processing unit 14 generates a road map screen showing the travel position from the detected travel position and the map information around the travel position read from the map information storage unit 13, and outputs the road map screen to the display unit 20 for display. In the example shown in FIG. 2, the vehicle map indicated by the T-shaped road composed of the roads R1 and R2 and the white triangle 100a is displayed on the road map screen.

  FIG. 3 is a schematic plan view for explaining a switching operation when a switching operation is accepted. FIG. 4 is a schematic diagram illustrating an example of a road map screen on which switching registration points are displayed. A white arrow in the figure indicates a traveling direction of the vehicle 100 including the in-vehicle navigation device 1, the imaging device 2, and the antenna 3. In the figure, 100b indicated by a cross mark and a range 2a indicated by diagonal lines indicate the traveling position of the vehicle 100 detected by the in-vehicle navigation device 1 and the field of view range captured by the imaging device 2. Here, the switching operation in the case where the switching operation by the driver is received when the vehicle 100 approaches the intersection or the junction where the line of sight is poor will be described. In the example shown in FIG. 3, a state in which the vehicle 100 is approaching in a slow-running state at an intersection with roads R <b> 1 and R <b> 2 with poor visibility is shown. A road map screen is displayed on the display unit 20 as shown in FIG. Yes.

  When the driver gives an instruction to switch to a side image to the operation reception unit 22 in a slow state where the vehicle speed of the vehicle 100 acquired by the vehicle speed acquisition unit 15 is less than a predetermined speed, it is displayed on the display unit 20. The road map screen is switched to the side image, and the driver can enter the road R1 while visually recognizing the presence of other vehicles traveling on the road R1 by the side image displaying the visual field range 2a. As the predetermined speed, for example, 10 km / h corresponding to the slow running state of the vehicle 100 may be set. In addition to switching to the side image, the traveling position 100b of the vehicle 100 is stored and registered in the DRAM 19 as a switching registration point. After the entry of the vehicle 100 to the road R1 is completed, the processing unit 14 switches the side image displayed on the display unit 20 to the road map screen on which the switching registration point is displayed. In the example shown in FIG. 4, the registered switching registration points are indicated by white squares 110 on the road map screen. Next, the switching operation when the vehicle approaches the switching registration point during traveling will be described.

    FIG. 5 is a schematic plan view for explaining the switching operation when the switching registration point is within a predetermined range. The white arrow in the figure indicates the traveling direction of the vehicle 100. 110a and 110b in the figure indicate a circular predetermined range having a predetermined radius (for example, 1 m) around the switching registration point and the switching registration point, respectively. When the traveling position 100b of the vehicle 100 is located within the circular predetermined range 110b having a predetermined radius from the switching registration point 110a in a state where the vehicle speed of the vehicle 100 is less than the predetermined speed, the road displayed on the display unit 20 The map screen is switched to the side image, and the driver can enter the road R1 while visually recognizing the presence of other vehicles traveling on the road R1 by the switched side image without performing the switching operation of the side image. It becomes possible. After the vehicle 100 completes the approach to the road R1, the processing unit 14 switches the side image displayed on the display unit 20 to a road map screen on which switching registration points are shown as shown in FIG.

  6 and 7 are flowcharts illustrating a procedure related to the switching process according to the first embodiment. The switching process executed by the processing unit 14 according to the program 161 includes registration of a switching registration point, determination of whether or not the traveling position is within a predetermined range from the switching registration point, and a road map screen and a side according to the determination result Includes switching of video display. The processing unit 14 determines whether or not the imaging device 2 is connected to the video input unit 21 (step S11). When determining that the imaging device 2 is not connected (NO in step S11), the processing unit 14 ends the switching process. When it is determined that the imaging device 2 is connected (YES in step S11), the processing unit 14 determines whether or not the vehicle speed given by the vehicle speed acquisition unit 15 is less than a preset speed V ( Step S12). For example, a slow speed of 10 km / h may be set as the speed V. If it is determined that the vehicle speed is not less than the speed V (NO in step S12), the processing unit 14 returns the process to step S12 for determining whether or not the vehicle speed is less than the speed V.

  When it is determined that the vehicle speed is less than the speed V (YES in step S12), the processing unit 14 acquires travel positions detected at regular time intervals (step S13). The processing unit 14 determines whether a switching operation signal output from the operation receiving unit 22 has been detected (step S14). When it is determined that the switching operation signal has been detected (YES in step S14), the processing unit 14 stores the acquired traveling position in the DRAM 19 and registers it as a switching registration point (step S16). The processing unit 14 switches the road map screen displayed on the display unit 20 to a side image provided from the video input unit 21 (step S17). The processing unit 14 acquires the travel position (step S18).

  The processing unit 14 determines whether or not the vehicle has completed the approach to the intersection or merging point based on the acquired travel position and the map information indicating the periphery of the travel position (step S19). If the processing unit 14 determines that the approach has not been completed (NO in step S19), the processing unit 14 returns the process to step S18 for acquiring the travel position. When it determines with the process part 14 having completed approach (it is YES at step S19), the side image | video currently displayed on the display part 20 is switched to the road map screen on which the switching registration point was displayed (step S20). The processing unit 14 determines whether or not the power has been turned off by detecting a power interruption signal that is provided in the in-vehicle navigation device 1 and is output when a power switch (not shown) is turned off (step) S21).

  If the processing unit 14 determines that the power is not turned off (NO in step S21), the processing unit 14 proceeds to step S12 for determining whether or not the vehicle speed is less than the speed V. When determining that the power is turned off (YES in step S21), the processing unit 14 ends the switching process. When determining that the switching operation signal is not detected (NO in step S14) in step S14 in which it is determined whether or not the switching operation signal is detected, the processing unit 14 registers the acquired travel position in the DRAM 19. It is determined whether or not it is within a predetermined range from the switching registration point (step S15). When it determines with the process part 14 not being in the predetermined range (it is NO at step S15), it returns a process to step S12 which determines whether the vehicle speed is less than the speed V. When it is determined that the processing unit 14 is within the predetermined range (YES in Step S15), the processing unit 14 proceeds to Step S17 for switching to the side image.

  The predetermined range that is set when determining whether or not the vehicle travel position is within the predetermined range from the switching registration point is that the vehicle is switched in a state where the vehicle is shifted to the left or right of the traveling road. Even when the registration point is approached, if the road to be entered and the road to be entered that constitutes the intersection or confluence of the switching registration point are included and empirically obtained and set in advance so as not to include other roads good.

Embodiment 2
FIG. 8 is a block diagram illustrating a configuration example of the in-vehicle navigation device according to the second embodiment. In the figure, reference numeral 6 denotes an in-vehicle navigation device according to the second embodiment, in which an FM multiplex broadcast receiving antenna 4 and a temperature sensor 5 for detecting an outside temperature of the vehicle, that is, an outside air temperature, are connected. A VICS receiver (weather information acquisition means) 61 that receives FM multiplex broadcasting waves and acquires VICS (registered trademark, Vehicle Information and Communication System) information including weather information.

  The in-vehicle navigation device 6 includes an outside air temperature detecting unit 63 that detects an outside air temperature based on a sensor signal given from the temperature sensor 5, a calendar information output unit 62 that outputs calendar information indicating a date, a holiday, and a holiday, The vehicle information acquisition part 64 which acquires the vehicle information which shows the operating states of the left-right winker and brake lamp which are provided in the vehicle which are not shown in figure, and the CLOCK (clock part) 66 which outputs time are provided. A ROM 65 storing a program 651 executed by the processing unit 14 is connected to the processing unit 14 via the bus 17. The processing unit 14 functions as a position detection unit, an information acquisition unit, a registration unit, a determination unit, and a switching unit in the present invention by reading the program 651 stored in the ROM 65 into the SRAM 18 and executing it.

  FIG. 9 is a schematic plan view for explaining the approach angle acquired by the processing unit 14. A white arrow and 100c in the figure indicate the traveling direction and the traveling position of the vehicle on which the vehicle-mounted navigation device 6 traveling on the road R4 and joining the road R3 is mounted. The center lines extending along the road by dividing the road widths of the road R3 and the road R4 into two equal parts are R3c and R4c. The processing unit 14 calculates and acquires the angle θ formed by the center lines R3c and R4c with reference to the map information stored in the map information storage unit 13 as the approach angle from the road R4 to the road R3, thereby obtaining the approach angle. It functions as an acquisition means. Further, the processing unit 14 functions as a road type acquisition unit by acquiring the road type of each of the road R3 and the road R4 that is running with reference to the map information.

  The processing unit 14 includes the road type and the approach angle acquired based on the travel position and the map information, the calendar information acquired from the calendar information output unit 62, the time acquired from the CLOCK 66, the outside temperature acquired from the outside temperature detection unit 63, and Information relating to the travel position consisting of weather information acquired from the VICS receiver 61, that is, travel status information is stored in the DRAM 19 in association with the switching registration point, and is registered as registration information. The ROM 65 (storage means) stores a plurality of switching conditions for determining whether to switch to the side image, which includes conditions to be satisfied by the approach angle, road type, time, outside temperature, and weather information. A switching condition table to be described later is stored in advance.

  Here, the switching operation in the case where the driver performs the switching operation to the side image when the vehicle equipped with the vehicle-mounted navigation device 6 at the intersection or merging point where the line of sight is approaching will be described. When the processing unit 14 detects a switching operation signal output by the operation receiving unit 22 in a state where the vehicle speed given from the vehicle speed acquisition unit 15 is less than a predetermined speed, the processing unit 14 inputs the video of the road map screen displayed on the display unit 20. The side image captured by the imaging device 2 provided from the unit 21 is switched and displayed. The processing unit 14 stores the traveling position of the vehicle in the DRAM 19 as a switching registration point, and stores the acquired traveling state information in the DRAM 19 in association with the switching registration point as registration information.

  FIG. 10 is a format example showing registration information. The coordinates of each travel position registered as the switching registration point are associated with registration information including an approach angle, road type A, road type B, calendar information, time, outside temperature, and weather information related to the travel position. . In the example shown in FIG. 10, as registration information associated with the switching registration point (X1, Y1), the approach angle “80 °”, road type A “city road A”, road type B “national road B”, calendar Information “Wednesday, May 16, 2007”, time “8:30”, outside temperature “15 ° C.”, and weather information “sunny” are stored. Road type A and road type B indicate the road type being traveled and the destination road, respectively. Next, the switching operation when the vehicle approaches the switching registration point during traveling will be described.

  FIG. 11 is a schematic plan view for explaining an acquisition operation of an approaching road. The white arrow in the figure indicates the traveling direction of the vehicle having the in-vehicle navigation device 6 traveling on the road R7. The road R7 is connected to the destination road R5, and branches to the road R6 just before connecting to the road R5. The DRAM 19 stores a switching registration point 110c, and the traveling position 100d of the vehicle is within a predetermined circular range 110d having a radius r from the switching registration point 110c. Further, a road R5, a road R6, and a road R7 are located within the predetermined range 110d. When the detected travel position is within a predetermined range from the switching registration point in a state where the vehicle speed given from the vehicle speed acquisition unit 15 is less than the predetermined speed, the processing unit 14 is stored in the DRAM 19 in association with the switching registration point. Read registration information.

  The processing unit 14 acquires an approach angle between a road that intersects the traveling direction of the vehicle and a road that merges. The processing unit 14 acquires a road having an approach angle that matches the approach angle included in the read registration information as the approach destination road. For example, in the example shown in FIG. 11, the processing unit 14 calculates the traveling direction of the vehicle and the approach angles θ1 and θ2 to the road R5 and the road R6 that intersect and merge, respectively. The processing unit 14 acquires the road R5 having the approach angle θ1 that matches the approach angle included in the registration information registered in the DRAM 19 in association with the switching registration point 110c as the destination road.

  When there are a plurality of roads having an approach angle that matches the read approach angle, the processing unit 14 acquires a road having a road type that matches the road type included in the registration information as an approach destination road. The processing unit 14 acquires switching conditions corresponding to the registration information from a plurality of switching conditions included in the switching condition table stored in the ROM 65, and functions as a switching condition acquisition unit. Moreover, the process part 14 functions as a 2nd determination means by determining whether driving condition information satisfy | fills the acquired switching conditions. Here, the process which the process part 14 performs as a switching condition acquisition means and a 2nd determination means is demonstrated.

  FIG. 12 is a format example showing the switching condition table. In the example shown in FIG. 10 and FIG. 12, road type A “city road A”, road type B “national road B”, calendar stored in association with the switching registration point (X1, Y1) shown in FIG. The information “May 16, 2007 (Wednesday)” and the time “8:30” are included in the road type A, road type B, calendar information, and time constituting the switching condition 1 included in the switching condition table shown in FIG. All of these conditions, “city road”, “national road”, “Monday-Friday”, and “8:00 to 9:00” are satisfied. In the switching condition table, an item indicated by “−” indicates that it is not included in the switching condition.

  When the registered information registered in association with the switching registration point corresponds to the switching condition 1, the processing unit 14 includes the traveling road type (road type A) and the approach destination road type (roads) included in the traveling state information. Type B), calendar information, and time determine whether or not the conditions that constitute the switching condition 1 are satisfied, and when it is determined that the conditions are satisfied, the road map screen displayed on the display unit 20 is displayed as a side image. Switch. Accordingly, when entering the national road from the city road during the time period from 8:00 to 9:00 on weekdays from Monday to Friday, the side image is switched. This makes it possible to switch to a side image when entering a highway where traffic volume is considered to increase during weekday commuting or school hours.

  The road type B “National highway A” and the calendar information “Sunday, May 20, 2007” stored in association with the switching registration point (X2, Y2) shown in FIG. 10 are shown in FIG. All of “National highway No. A” and “Sat, Sun”, which are conditions related to the road type B and the calendar information constituting the switching condition 2 included in the switching condition table, are satisfied. When the registration information stored in association with the switching registration point corresponds to the switching condition 2, the processing unit 14 switches the approach destination road type (road type B) and calendar information included in the traveling state information, respectively. It is determined whether or not the condition that constitutes the condition 2 is satisfied. When it is determined that the condition 2 is satisfied, the side image is switched. Accordingly, when entering National Route A on Saturday or Sunday, the side image is switched. This makes it possible to switch to a side image when entering a specific trunk road with heavy traffic on Saturdays and Sundays.

  The road type A “private road” and the road type B “national road C” stored in association with the switching registration point (X3, Y3) shown in FIG. 10 are the switching conditions included in the switching condition table shown in FIG. 3, “private road” and “national road”, which are the conditions related to road type A and road type B constituting the road 3, are all satisfied. When the registered information stored in association with the switching registration point corresponds to the switching condition 3, the processing unit 14 includes the traveling condition and the road type of the entry destination included in the traveling status information, respectively. It is determined whether or not the conditions relating to the road types A and B are satisfied, and when it is determined that the conditions are satisfied, switching to the side image is performed. Therefore, when entering the national road from the private road, the side image can be switched. As a result, it is possible to switch to a side image when entering a national road with a high traffic volume from a private road having a large blind spot.

  Road type A “National road D”, road type B [National road E], and calendar information “Friday, January 4, 2007” stored in association with the switching registration point (X4, Y4) shown in FIG. ”And the outside air temperature“ 3 ° C. ”are the conditions related to the road type A, road type B, calendar information, and outside air temperature constituting the switching condition 4 included in the switching condition table shown in FIG. No. ”,“ National Route E ”,“ January to March ”and“ 0 ° C. or higher ”are all satisfied. When the registered information stored in association with the switching registration point corresponds to the switching condition 4, the processing unit 14 indicates that the traveling type and the destination road type, calendar information, and outside temperature included in the traveling state information are respectively It is determined whether or not a condition that constitutes the switching condition 4 is satisfied, and when it is determined that the condition is satisfied, switching to the side image is performed. Accordingly, when entering from the national highway D to the national highway E with the outside air temperature being 0 ° C. or more during the period from January to March, the side image is switched. As a result, when the outside temperature falls during the winter season, when the outside temperature is above a certain temperature when entering the intersection where the installed curve mirror may be condensed, it switches to the side image. It becomes possible.

  The road type B “National road B” and the weather information “Rain” stored in association with the switching registration point (X5, Y5) shown in FIG. 10 include the switching condition 5 included in the switching condition table shown in FIG. “National road B” and “rain”, which are conditions relating to the road type B and the weather information, are satisfied. When the registration information stored in association with the switching registration point corresponds to the switching condition 5, the processing unit 14 is configured so that the road type and the weather information of the destination included in the traveling state information respectively constitute the switching condition 5. It is determined whether or not the image is satisfied. When it is determined that the image is satisfied, the video is switched to the side image. Therefore, when entering the national highway No. B when it rains, it is switched to the side image. This makes it possible to switch to a side image when entering a specific road whose visibility is deteriorated during rainy weather.

  Road type A “city road B”, road type B “national road C”, and calendar information “August 15, 2007 (Wednesday) stored in association with the switching registration point (X6, Y6) shown in FIG. ) ”, Time“ 6:20 ”, and weather information“ sunny ”are road type A, road type B, calendar information, time, and weather information constituting the switching condition 6 included in the switching condition table shown in FIG. Are “city road B”, “national road C”, “August”, “0: 00 to 5:00, 6: 00 to 24:00”, and “fine”. When the registration information stored in association with the switching registration point corresponds to the switching condition 6, the processing unit 14 includes the traveling road type, the destination road type, the calendar information, the time, It is determined whether or not the weather information satisfies a condition that constitutes the switching condition 6, and when it is determined that the condition is satisfied, switching to the side image is performed. Therefore, when entering the national road C from the city road B at the time of clear weather at 0 o'clock to 5 o'clock or 6 o'clock to 24 o'clock in August, the side image is switched. Thus, when sunlight enters the imaging device 2 and normal side images are not input when entering a specific road from a specific road during a clear day in a specific period and a specific time zone, It is possible to switch to the side video only in different time zones.

  Each condition constituting the switching condition included in the switching condition table is not limited to the example shown in FIG. 12, and may be set in advance in accordance with the occurrence of a poor-looking situation requiring a side image. In addition, the switching conditions included in the switching condition table are not limited to those stored in advance, and the switching condition table may be stored in the DRAM 19 so that the switching conditions can be added from the travel point and the travel state information. good. For example, when the processing unit 14 registers a switching registration point, whether or not sunlight is incident on the imaging device 2 is determined from a side image, and the time is included when it is determined that sunlight is incident. A switching condition may be added to the switching condition table stored in the DRAM 19 so as to switch to the side video in the time zone excluding the time zone.

  13 and 14 are flowcharts showing the procedure of the switching process according to the second embodiment. The switching process executed by the processing unit 14 in accordance with the program 651 includes registration of the switching registration point and registration information, determination of whether or not the traveling point is within a predetermined range from the switching registration point, and according to the registration information from the switching condition table. This includes acquisition of switching conditions, determination of whether or not the driving situation information satisfies the switching conditions, and switching between the display of the road map screen and the side image. The processing unit 14 determines whether or not the vehicle speed given by the vehicle speed acquisition unit 15 is less than a preset speed V (step S31). If it is determined that the vehicle speed is not less than the speed V (NO in step 31), the processing unit 14 returns the process to step S31 for determining whether or not the vehicle speed is less than the speed V.

  If the processing unit 14 determines that the vehicle speed is less than the speed V (YES in step S31), the processing unit 14 obtains a traveling position detected at regular time intervals (step S32). The processing unit 14 acquires travel status information (step S33). The processing unit 14 determines whether a switching operation signal output from the operation receiving unit 22 has been detected (step S34). When it is determined that the switching operation signal has been detected (YES in step S34), the processing unit 14 stores the acquired traveling position in the DRAM 19 and registers it as a switching registration point (step S46). The processing unit 14 registers the acquired traveling state information as registration information by storing it in the DRAM 19 in association with the switching registration point (step S47). The processing unit 14 switches the road map screen displayed on the display unit 20 to a side image provided from the video input unit 21 (step S41). The processing unit 14 acquires the travel position (step S42).

  The processing unit 14 determines whether or not the vehicle has completed the approach to the intersection or merging point based on the acquired travel position and the map information indicating the periphery of the travel position (step S43). If it is determined that the approach has not been completed (NO in step S43), the processing unit 14 returns the process to step S42 for acquiring the travel position. When it determines with the process part 14 having completed approach (it is YES at step S43), the side image | video currently displayed on the display part 20 is switched to the road map screen on which the switching registration point was displayed (step S44). The processing unit 14 determines whether or not the power is turned off by detecting a power interruption signal output when a power switch (not shown) provided in the in-vehicle navigation device 6 is turned off (step) S45).

  When it is determined that the power is not turned off (NO in step S45), the processing unit 14 proceeds to step S31 for determining whether or not the vehicle speed is less than the speed V. When determining that the power is turned off (YES in step S45), the processing unit 14 ends the switching process. When determining that the switching operation signal is not detected (NO in step S34) in step S34 for determining whether or not the switching operation signal is detected, the processing unit 14 registers the acquired travel position in the DRAM 19. It is determined whether or not it is within a predetermined range from the switching registration point (step S35). When it determines with the process part 14 not being in the predetermined range (it is NO at step S35), a process is returned to step S31 which determines whether the vehicle speed is less than the speed V. FIG. If it is determined that the processing unit 14 is within the predetermined range (YES in step S35), the processing unit 14 reads registration information stored in the DRAM 19 in association with the switching registration point (step S36).

  The processing unit 14 acquires the approach destination road based on the approach angle and the approach destination road type included in the read registration information (step S37). The processing unit 14 determines whether or not the switching condition corresponding to the read registration information is in the switching condition table stored in the ROM 65 (step S38). If it is determined that there is no switching condition (NO in step S38), the processing unit 14 moves the process to step S41 for switching to the side image. If it is determined that there is a switching condition (YES in step S38), the processing unit 14 acquires the switching condition (step S39). The processing unit 14 determines whether or not the traveling state information satisfies the switching condition (Step S40). When it is determined that the traveling state information satisfies the switching condition (YES in Step S40), the processing unit 14 moves the process to Step S41 for switching to the side image. When it is determined that the traveling state information does not satisfy the switching condition (NO in step S40), the processing unit 14 returns the process to step S31 for determining whether or not the vehicle speed is less than the predetermined speed V.

  In the second embodiment, the example in which the approach destination road is acquired based on the approach angle and the road type before the switching condition is acquired from the switching condition table has been described. You may make it acquire the road of an approach destination after acquiring the switching conditions by designating the condition which concerns on an angle beforehand. Moreover, although the example in which the switching of the side image is performed when the vehicle speed acquired by the vehicle speed acquisition unit 15 satisfies the predetermined condition in a state where the vehicle speed is less than the predetermined speed V is not limited thereto, the vehicle information acquisition unit is not limited thereto. Depending on the operation status of the left and right winkers acquired by No. 64, for example, when either the left or right winker operates and the vehicle speed enters less than a predetermined speed, switching to the side image may be performed.

  The second embodiment is configured as described above, and the other configurations, operations, and processes are the same as those of the first embodiment. Therefore, corresponding portions are denoted by the same reference numerals and process names, and detailed descriptions thereof are provided. Is omitted.

Embodiment 3
FIG. 15 is a block diagram illustrating a configuration example of the in-vehicle navigation device according to the third embodiment. In the figure, reference numeral 7 denotes an in-vehicle navigation device provided with a storage medium reading unit 71. A storage medium reading unit 71 is connected to the processing unit 14. The program 161 is recorded in a storage medium 72 that is inserted into the storage medium reading unit 71. The program 161 is stored in the SRAM 18 or DRAM 19 from the storage medium 72 via the storage medium reader 71 and executed. The processing unit 14 causes the in-vehicle navigation device 7 to perform switching processing according to the program 161 of the present invention stored in the SRAM 18 or the DRAM 19. The program 161 according to the present invention can be stored not only in the storage medium 72 such as a CD-ROM or DVD-ROM but also in an external memory such as a memory card. In this case, the program 161 is read from an external memory (not shown) connected to the processing unit 14 and stored in the SRAM 18 or the DRAM 19. Furthermore, communication may be established between a communication unit (not shown) connected to the processing unit 14 and an external server computer, and the program may be downloaded to the SRAM 18 or the DRAM 19.

  The third embodiment is configured as described above, and the other configurations, operations, and processes are the same as those of the first embodiment. Therefore, corresponding portions are denoted by the same reference numerals and process names, and detailed description thereof is provided. Is omitted.

1 is a block diagram illustrating a configuration example of an in-vehicle navigation device according to Embodiment 1. FIG. It is a schematic diagram which shows the example of a road map screen. FIG. 6 is a schematic plan view for explaining a switching operation when a switching operation is received. It is a schematic diagram which shows the example of the road map screen on which the switching registration point was displayed. It is a schematic plan view for demonstrating switching operation in the case where it exists in the predetermined range from a switching registration point. 3 is a flowchart illustrating a procedure of switching processing according to the first embodiment. 3 is a flowchart illustrating a procedure of switching processing according to the first embodiment. It is a block diagram which shows the structural example of the vehicle-mounted navigation apparatus which concerns on Embodiment 2. FIG. It is a schematic plan view for demonstrating the approach angle acquired by a process part. It is a format example which shows registration information. It is a schematic plan view for demonstrating the acquisition operation | movement of the approaching road. It is an example format which shows a switching condition table. 10 is a flowchart illustrating a procedure of switching processing according to the second embodiment. 10 is a flowchart illustrating a procedure of switching processing according to the second embodiment. FIG. 10 is a block diagram illustrating a configuration example of an in-vehicle navigation device according to a third embodiment. It is a schematic plan view for demonstrating operation | movement of the conventional vehicle side monitoring apparatus. It is a schematic diagram which shows the example of the side image | video displayed on the display part of the conventional vehicle side monitoring apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car-mounted navigation apparatus 2 Imaging device 3 Antenna 11 GPS receiving part 12 Gyro sensor 13 Map information memory | storage part 14 Processing part 15 Vehicle speed acquisition part 16 ROM
17 bus 18 SRAM
19 DRAM
20 Display Unit 21 Video Input Unit 22 Operation Accepting Unit 161 Program

Claims (9)

Switching between a position detection means for detecting the traveling position of the vehicle, a video input unit for inputting a side image obtained by imaging the side of the vehicle, a road map screen showing the traveling position, and the side image. In-vehicle navigation device comprising switching means for displaying and receiving means for receiving an instruction to switch to the side image,
A registration unit that registers the travel position when the reception unit receives an instruction;
Determination means for determining whether or not the travel position detected by the position detection means is within a predetermined range from the travel position registered by the registration means;
The switching means is configured to switch to and display the side image when the receiving means receives an instruction or when the determining means determines that it is within a predetermined range. apparatus. Information acquisition means for acquiring information relating to the travel position detected by the position detection means;
Storage means for storing a plurality of switching conditions for switching to the side video according to the information,
The registration means is configured to register the information in association with the travel position detected by the position detection means,
A switching condition acquisition means for acquiring a switching condition according to the information registered in association with the travel position from the storage means;
Whether the information acquired by the information acquisition unit satisfies the switching condition acquired by the switching condition acquisition unit when the determination unit determines that the travel position detected by the position detection unit is within a predetermined range. A second determination means for determining whether or not
The in-vehicle navigation device according to claim 1, wherein the switching unit is configured to switch to and display the side image when the second determination unit determines that the switching condition is satisfied.   The in-vehicle navigation device according to claim 2, wherein the information acquisition unit includes a road type acquisition unit that acquires a road type related to the travel position detected by the position detection unit. Equipped with a calendar information output unit,
The in-vehicle navigation device according to claim 2 or 3, wherein the information acquisition unit is configured to acquire calendar information output by the calendar information output unit. With a clock,
The in-vehicle navigation device according to any one of claims 2 to 4, wherein the information acquisition unit is configured to acquire a time output by the timepiece unit. An outside air temperature detecting means for detecting the outside air temperature,
The in-vehicle navigation device according to any one of claims 2 to 5, wherein the information acquisition unit is configured to acquire an outside air temperature detected by the outside air temperature detection unit.   The in-vehicle navigation device according to any one of claims 2 to 6, wherein the information acquisition unit includes a weather information acquisition unit that acquires weather information.   The said information acquisition means is provided with the approach angle acquisition means which acquires the approach angle to the other road where the said vehicle approachs from the road which concerns on the said driving | running | working position, The any one of Claim 2 to 7 characterized by the above-mentioned. The in-vehicle navigation device according to item. One of the road map screen and the side image showing the traveling position, comprising: a position detecting means for detecting the traveling position of the vehicle; and a video input unit for inputting a side image obtained by imaging the side of the vehicle. In the program for functioning the in-vehicle navigation device to switch to and display,
A reception step for receiving an instruction to switch to the side image;
A registration step for registering the travel position when the reception step receives an instruction;
A determination step of determining whether or not the travel position detected by the position detection means is within a predetermined range from the travel position registered by the registration step;
When the receiving step receives an instruction or when it is determined that the determination step is within a predetermined range, a program for executing a switching step of switching to and displaying the side image.

Images