JP4849237B2 - Traveling route guidance device for vehicles - Google Patents

Description

  The present invention relates to a vehicular travel route guide device for guiding a travel route for a vehicle.

  As the vehicle travels, the current position is detected by GPS (Global Positioning System), etc., and the current position is displayed on a display device together with a road map, and an appropriate route from the starting point to the destination The vehicle travel route guidance device (also referred to as an in-vehicle navigation device) that guides the vehicle with a display device or a voice output device contributes to efficient and safe driving for the user.

  In recent years, a vehicular travel route guide device has not only merely guided a route to a destination but also various functions have been added to improve user convenience. For example, it receives service information such as nearby stores, restaurants, gas stations, parking lots, and events via broadcasting / communication, and receives information on the current location, waypoints, destinations, and surrounding areas specified by the user. A vehicle-mounted navigation device has been devised that makes a determination based on information and allows a user to select and display from facilities that are close to each other (see Patent Document 1).

JP 2002-107155 A

  In the configuration of Patent Document 1, it is necessary for the user to perform an operation for selection or display, and there is a problem that an operation load other than the operation of the user increases. There is also a problem that the displayed facility may not be easily reached depending on traffic regulations and road conditions. In addition, since the traveling user often does not know the ease of reaching the facility, it is impossible to sequentially select the facility only by displaying on the map.

  Against the background of the above problems, an object of the present invention is to provide a vehicular travel route guidance device capable of displaying and guiding facilities useful for a user around a destination without user operation.

Means for Solving the Problems and Effects of the Invention

A vehicle travel route guidance apparatus for solving the above-described problems includes map data storage means for storing road map data, guide route search means for searching for a guide route to a destination on the road map data, and road map data. A road map display means for displaying a road map image together with the searched guidance route based on the vehicle, a traveling direction detection means for detecting the traveling direction of the vehicle on the guidance route, and a road map data in advance around the destination. From the facility search means for searching for the target facility of the specified type and the searched target facility , in the case of a left-handed road, the one on the left side of the traveling direction of the vehicle, or in the case of a right-handed road exploring what the right in the traveling direction of the vehicle, and alongside possible facility searching means for specifying the position that was searched as alongside possible facilities available alongside The search result by setting the search unit assumes that it comprises a search result output means for displaying on a road map, a.

  With the above configuration, it is not necessary for the user to perform an operation for selection or display, and the problem that the operation load other than the operation of the user increases is solved. Moreover, since the facility which can be laid can enter without crossing the center line of the road, the user can reach the desired target facility more safely even in an unfamiliar land.

  Moreover, the search result output means in the vehicle travel route guide device of the present invention can be configured to display the searched layable facility so that it can be identified from other target facilities.

  With the above configuration, the user can recognize a facility that can be laid out more quickly, and has sufficient time to predict in advance which route to reach the facility and how long it will take. Can be secured.

  Further, the vehicle travel route guide device of the present invention uses a layable facility that can be directly entered from the lane on the vehicle traveling direction side of the guide route as a primary layable facility, and the layable facility search means includes the primary layable facility. When a vehicle enters a branching route that is within a certain distance from the destination and branches off from the middle or the end of the guide route, the lane on the vehicle traveling direction side of the branch route The search facility is configured to display the secondary installation facility capable of being directly entered from the other target facilities so that the searched secondary installation facility can be identified. You can also.

  According to the above configuration, even if there is no primary layable facility, a secondary layable facility that is an alternative to that is searched for, so that convenience for the user is improved. In addition, since the facilities that can be laid out on the secondary side are on the branch route that branches from the middle or the end of the guide route, it gives the user a sense of security such as “easy to go” and “easy to return to the guide route”. You can also.

  Further, the laterally possible facility search means in the vehicle travel route guide device of the present invention searches the map data for a branch route to the secondary laterally possible facility together with the secondary laterally possible facility, and outputs a search result. The means may be configured to display the branch route together with the guide route on the road map.

  By the above configuration, not only simply displaying the facility that can be placed on the secondary side, but also displaying the branch route to the facility that can be placed on the secondary side, so the user only needs to drive according to the branch route, There is no need to search for the route to the facility that can be installed on the secondary side. In addition, since the guide route to the destination is also displayed, the user does not have a sense of incongruity that “the destination has been changed without permission”.

  In addition, the vehicle travel route guide device of the present invention includes position detection means for detecting the current position of the vehicle, and the facility search means is configured to detect the vehicle when the vehicle approaches a predetermined distance from the destination. It is also possible to preferentially search for a target facility that is ahead of the current position and ahead of the destination and ahead of the destination as a candidate for a layable facility.

  According to the above configuration, since it is not necessary to make a U-turn before the destination, it is easy to reach and it is possible to search for a layable facility close to the destination.

  Further, the facility search means in the vehicle travel route guide device of the present invention lays out the target facility in a certain angle range set to be less than 180 ° on the side where the current traveling position is estimated with the current position as the center of the angle. It can also be configured to search preferentially as a possible facility candidate.

  Since the search range is limited by the above configuration, the time required for the search can be shortened. In addition, if there is a candidate for a facility that can be laid sideways, unlike a target facility on the side near 180 °, it is easy for the user to visually recognize, there is no need to make a sudden left turn, and the possibility of leaving the guidance route is low. So it is easy to reach.

  Further, the search result output means in the vehicle travel route guide device of the present invention is configured to preferentially display the closest to the destination on the road map when there are a plurality of searched layable facilities. You can also

  As the user's psychology, it is desirable that the layable facility is closer to the destination. This is because it is safer to be closer to the destination when you need to be in a hurry. With the above configuration, it is possible to display a layable facility that sufficiently reflects user psychology, and the degree of satisfaction of the user is also increased.

In addition, the vehicle travel route guide device of the present invention includes incidental information receiving means for receiving incidental information related to availability of the target facility , and the search result output means is based on the incidental information and currently It is also possible to configure such that only available items are identifiable on the road map.

  In recent years, a system for acquiring service information (accompanying information) such as stores, restaurants, gas stations, parking lots, and events around roads through broadcasting / communication has been developed and its infrastructure is being improved. With the above configuration, if the facility usage status can be acquired as incidental information, only open facilities or facilities that are not crowded (that is, available facilities) are displayed. This will not lead to a situation of “no”, the convenience of the user will be further improved, and the satisfaction will be further increased.

Further, the target facility in the vehicle travel route guide device of the present invention is a parking lot, the incidental information includes empty vehicle information of the parking lot, and the search result output means displays only the empty parking lot of the parking lot. It can also be configured as follows.

  A typical facility often found around destinations is a parking lot. Even if there is a parking lot at the destination, it is often necessary to find another parking lot when the parking lot is full. With the above-described configuration, it is possible to search and display a parking lot that is in the traveling direction of the vehicle on the guide route or in the vicinity thereof and that is close to the destination and has an empty space.

  In addition, the search result output means in the vehicle travel route guide device of the present invention displays the layable facilities together with other target facilities so that the display states of the layable facilities and the other target facilities are different from each other. It can also be configured to.

  By the said structure, the user can grasp | ascertain a layable facility more rapidly and can reach the layable facility.

  Moreover, the search result output means in the vehicle travel route guide device of the present invention can be configured to hide target facilities other than the layable facilities.

  By the said structure, a user can grasp | ascertain a layable facility more rapidly and can reach the layable facility without being confused by an unnecessary display.

  Further, the vehicle travel route guide device of the present invention has destination setting means for setting a destination on the road map based on a user input, and the layable facility searching means is set on the road map data. It can also be configured to search for layable facilities that exist around the destination.

  With the above configuration, for example, it is possible to search for a layable facility closer to the destination according to the destination set by the user.

The vehicular travel route guide device of the present invention includes travel trajectory storage means for storing the travel trajectory of the vehicle , and the temporary destination determination means detects a predetermined trajectory pattern in the stored travel trajectory. when in, to determine the temporary destination which satisfies the predetermined positional relationship between the trajectory pattern portion, alongside possible facility search means on the road map data, search the alongside possible facilities which are located around the determined temporary destination It can also be configured to.

  With the above configuration, even if a destination is not set, a temporary destination is determined, and it is possible to search for a layable facility as in the case where the destination is set as described above.

  Further, the trajectory pattern in the vehicular travel route guide device of the present invention is determined as a trajectory pattern closed within a predetermined distance, and the temporary destination determining means sets the temporary destination inside the closed trajectory pattern. It can also be configured to determine.

  The storage of the travel locus is generally performed as a function of the vehicle travel route guide device. In addition, in order to search for a destination, a parking lot, or the like around the destination, driving is often performed so as to draw a circulation pattern. With the above configuration, it is not necessary to add hardware, and a temporary destination can be determined by a simple method without performing complicated processing.

  In addition, the temporary destination determination means in the vehicle travel route guide device of the present invention, when the display magnification is enlarged to a certain level or more in a state where the road map is scrolled to another field of view separated from the current position, A temporary destination may be determined within the enlarged map view.

  In most cases, when a road map is displayed, the current position of the vehicle is displayed in the center of the map view. When the vicinity of the destination is approached, the map is scrolled or the display magnification is enlarged to search for a parking lot or the like. In this case, the destination is often included in the display field of view that is scrolled and enlarged in display magnification. Also with the above configuration, it is not necessary to add hardware, and the temporary destination can be determined by a simple method without performing complicated processing. Also, by using the condition of "scroll and enlarge", "I just scrolled the map because I wanted to know the situation near the current position" or "I just enlarged the display magnification because I wanted to know the details near the current position" In some cases, the temporary destination is not determined, so that guidance contrary to the intention of the user is not performed, and the reliability of the user with respect to the vehicle travel route guidance device is increased.

  Hereinafter, a vehicle travel route guide device of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a vehicle travel route guide device 100. The vehicle travel route guide device 100 includes a position detector 1, a map data input device 6, an operation switch group 7, a remote control (hereinafter referred to as remote control) sensor 11, a voice synthesis circuit 24 for performing voice guidance, a speaker 15, and a memory. 9, a display 10, a transceiver 13, a hard disk drive (HDD) 21, a LAN (Local Area Network) I / F (interface) 26, a control circuit 8 connected thereto, a remote control terminal 12, and the like.

  The position detector 1 is a well-known geomagnetic sensor 2, a gyroscope 3 that detects the rotational angular velocity of the vehicle, a distance sensor 4 that detects the travel distance of the vehicle, and a GPS receiver that detects the position of the vehicle based on radio waves from a satellite. Machine 5 is provided. Since these sensors 2, 3, 4, and 5 have errors of different properties, they are configured to be used while being complemented by a plurality of sensors. Depending on the accuracy, some of the above-described sensors may be used, and further, a steering rotation sensor or a wheel sensor of each rolling wheel, such as a vehicle speed sensor 23, may be used. The position detector 1 corresponds to the position detection means of the present invention.

  As the operation switch group 7, for example, a touch panel 22 integrated with the display device 10 or a mechanical switch is used. The touch panel 22 is pressed when an electric circuit is wired on the screen of the display 10 in the X-axis direction and the Y-axis direction through a gap called a spacer on a glass substrate and a transparent film, and the user touches the film. Since the voltage value changes due to short-circuiting of a part of the wiring, a so-called resistance film method for detecting this as a two-dimensional coordinate value (X, Y) is widely used. In addition, a known so-called capacitance method may be used. In addition to the mechanical switch, a pointing device such as a mouse or a cursor may be used. Moreover, you may arrange | position the mechanical switch of the operation switch group 7 in the escutcheon which covers the indicator 10 and its periphery and becomes a design frame.

  It is also possible to input various instructions using the microphone 31 and the voice recognition unit 30. In this method, a voice signal input from the microphone 31 is processed by a voice recognition technique such as a well-known hidden Markov model in the voice recognition unit 30, and converted into an operation command corresponding to the result. Various instructions can be input through the operation switch group 7, the remote control terminal 12, the touch panel 22, and the microphone 31 corresponding to the destination setting means of the present invention.

  The transmitter / receiver 13 is connected to a road traffic from a VICS (Vehicle Information and Communication System) center 14 by an optical beacon or a radio beacon output from a transmitter (not shown) provided along the road, for example. It is a device for receiving information or receiving FM multiplex broadcasting. Moreover, it is good also as a structure which can be connected to external networks, such as the internet, using the transmitter / receiver 13. FIG.

  Further, by communicating with the ETC vehicle-mounted device 17, it is possible to take into the vehicle travel route guide device 100 the charge information received by the ETC vehicle-mounted device 17 from the roadside device (not shown). Further, the ETC on-vehicle device 17 may be connected to an external network and communicate with the VICS center 14 or the like.

  The control circuit 8 is configured as a normal computer, and connects a well-known CPU 81, ROM 82, RAM 83, I / O 84 which is an input / output circuit, A / D conversion unit 86, drawing unit 87, clock IC 88 and these components. A bus line 85 is provided. The CPU 81 controls the navigation program 21p and data stored in the HDD 21. The CPU 81 controls the reading / writing of data to / from the HDD 21. In addition, a program for performing a minimum necessary operation as the vehicular travel route guide device 100 may be stored in the ROM 82 in the case where the CPU 81 cannot control the reading and writing of data with respect to the HDD 21. . The control circuit 8 corresponds to the guidance route searching means, traveling direction detecting means, facility searching means, layable facility searching means, and temporary destination determining means of the present invention.

  The A / D conversion unit 86 includes a well-known A / D (analog / digital) conversion circuit, and converts analog data input from the position detector 1 or the like to the control circuit 8 into digital data that can be calculated by the CPU 81, for example. It is.

  The drawing unit 87 generates display screen data to be displayed on the display unit 10 from map data 21m (described later) stored in the HDD 21 or the like, display data, and display color data.

  The clock IC 88 is also called a real-time clock IC, and sends or sets clock / calendar data in response to a request from the CPU 81. The CPU 81 acquires date / time information from the clock IC 88. Further, date and time information included in the GPS signal received by the GPS receiver 5 may be used. The date information may be generated based on a real-time counter included in the CPU 81.

  In addition to the navigation program 21p, the HDD 21 stores so-called map matching data for improving the accuracy of position detection, and map data 21m, which is a map database including road data representing road connections. The map data 21m includes drawing data, route data, index data, and the like. The HDD 21 corresponds to map data storage means and travel locus storage means of the present invention. The map data 21m corresponds to the road map data of the present invention.

  The drawing data is for displaying a road map on the screen of the display 10 and has node information and link information. This is because each road on the map is divided into a plurality of nodes that indicate inflection points such as intersections, branch points, junctions, and curves of a predetermined angle or more, and each node is defined as a link, and these links are connected. This is based on the idea of constructing a map.

  The node information includes, for each node, a node number indicating a unique number (node ID) and coordinates, such as a three-dimensional intersection or a multilane intersection. For each link, each link has its own unique number (link ID), start and end coordinates, link angle with respect to a specific direction (eg north), road width, road type (highway, national road, prefectural road, etc.) In addition to the data indicating, for example, it is composed of link attributes which are data relating to restrictions on the number of road lanes, one-way traffic, etc., or detours in intersection areas.

  Index data is used to search for a location when a place of departure or destination is entered as a place name, building name, telephone number, etc., and the corresponding place name, building name, telephone number, etc. Data associated with the coordinates on the map. When the place name, building name, telephone number, etc. are designated by the operation switch group 7 etc., the control circuit 8 detects the coordinates of the point from the index data and displays them on the road map of the display 10. It is configured.

  The route data is used for setting a guide route to the destination, and has node information, link information, and network information. The node information in the route data has, for each node, a node attribute indicating its ID, such as a three-dimensional intersection or a multi-lane intersection.

  The link information in the route data has data necessary for cost calculation, such as a link ID, a link attribute, a link type, and a link length, for each link. The link attribute is data indicating that the link is a tunnel, for example, the link type is data indicating the type of road, and the link length is data indicating the road length indicated by the link. . The network information is data indicating what kind of link is connected to each node.

  In addition, in the HDD 21, auxiliary information for route guidance, entertainment information, and other data can be written independently by the user and stored as user data 21u. Data and various information necessary for the operation of the vehicle travel route guide device 100 are also stored as the database 21d.

  The navigation program 21p, map data 21m, user data 21u, and database 21d can be added and updated from the storage medium 20 via the map data input device 6. The storage medium 20 is generally a CD-ROM or DVD based on the amount of data, but may be another medium such as a memory card. Moreover, you may use the structure which downloads data via an external network.

  The memory 9 is constituted by a rewritable device such as an EEPROM (Electrically Erasable & Programmable Read Only Memory) or a flash memory, and information necessary for the operation of the vehicle travel route guide device 100. And data is stored. The memory 9 holds the stored contents even when the vehicular travel route guide device 100 is turned off. Further, information and data necessary for the operation of the vehicle travel route guide device 100 may be stored in the HDD 21 instead of the memory 9. Furthermore, information and data necessary for the operation of the vehicle travel route guide device 100 may be stored separately in the memory 9 and the HDD 21.

  The display 10 is composed of a known color liquid crystal display, and includes a dot matrix LCD (Liquid Crystal Display) and a driver circuit (not shown) for performing LCD display control. The driver circuit uses, for example, an active matrix driving method in which a transistor is attached to each pixel so that the target pixel can be reliably turned on and off, and a display command sent from the control circuit 8 (drawing unit 87) and Display is performed based on the display screen data. Further, an organic EL (ElectroLuminescence) display or a plasma display may be used as the display 10. The display device 10 corresponds to the road map display means and search result output means of the present invention.

  The speaker 15 is connected to a well-known voice synthesis circuit 24, and the digital voice data stored in the memory 9 or the HDD 21 in accordance with a command from the navigation program 21p is converted into analog voice by the voice synthesis circuit 24 and sent out. Note that speech synthesis methods include a recording / editing method in which speech waveforms are stored as they are or after being encoded and connected as necessary, and a text synthesis method in which corresponding speech is synthesized from character input information.

  The vehicle speed sensor 23 includes a rotation detection unit such as a known rotary encoder. For example, the vehicle speed sensor 23 is installed in the vicinity of the wheel mounting unit to detect the rotation of the wheel and send it to the control circuit 8 as a pulse signal. The control circuit 8 converts the rotation speed of the wheel into the speed of the vehicle, calculates the expected arrival time from the current position of the vehicle to a predetermined location, and calculates the average vehicle speed for each travel section of the vehicle.

  The communication unit 25 is configured as a well-known wireless transceiver, and is used for connecting to a public communication network such as the Internet. The communication unit 25 may be configured as an interface circuit between the mobile communication terminal and the control circuit 8 for performing data communication by connecting a mobile communication terminal (not shown) such as a mobile phone. The communication unit 25 corresponds to the incidental information receiving means of the present invention.

  The LAN I / F 26 is an interface circuit for exchanging data with other in-vehicle devices and sensors via the in-vehicle LAN 27. Further, data may be taken from the vehicle speed sensor 23 or connected to the ETC on-vehicle device 17 via the LAN I / F 26.

  With this configuration, when the navigation program 21p is activated by the CPU 81 of the control circuit 8, the user can operate the operation switch group 7, the touch panel 22, the remote control terminal 12, or the microphone. When the route guidance processing for displaying the guidance route from the menu displayed on the display 10 to the destination by the voice input from the display 10 on the display 10 is selected, the following processing is performed.

  That is, first, the user searches for a destination. The destination search method includes, for example, a method of specifying an arbitrary point on the map, a method of searching from the area where the destination is located, a method of searching from the telephone number of the destination, and a name of the destination from the Japanese syllabary table There are a method of searching by inputting the number of characters stored in the memory 9 as a facility frequently used by the user. When the destination is set, the current position of the vehicle is obtained by the position detector 1, and a process for obtaining an optimum guide route to the destination from the current position is performed.

  When the route guidance for the destination is performed, the control circuit 8 highlights the above guidance route on the road map on the screen of the display 10, and the voice synthesis circuit 24 and the speaker 15 advance along the guidance route. At a predetermined timing before reaching the guidance, for example, a right turn point or a left turn point, a process for generating a sound for guiding the right turn or left turn is executed.

  As a method for automatically setting an optimum guide route, a method such as the Dijkstra method is known. When searching for a guide route, the departure point is usually the current position of the vehicle, but if you want to set a place different from the current position as the departure point, use the operation switch group 7 as described above. The departure place can be set arbitrarily.

  When the road map is displayed, the control circuit 8 accesses the HDD 21 (map data 21m) and reads the drawing data into the RAM 83, for example. And the control circuit 8 (drawing part 87) specifies the link ID row | line | column and node ID row | line | column between them from the node ID of the start end of the road for every road using the drawing data, and these link By extracting the coordinates of the nodes and links in each road from the node information and link information of the drawing data based on the ID and the node ID, and displaying the extracted coordinate points according to the node attributes and link attributes, a road map Is displayed on the screen of the display 10.

  Further, when setting the guide route, the control circuit 8 accesses the HDD 21 (map data 21m) and reads the route data into the RAM 83 or the like. Then, the control circuit 8 uses the network information in the route data to sequentially search for a route from the departure point to the destination, and selects a route from the plurality of searched routes by evaluation value calculation, for example, cost calculation by the Dijkstra method. The operation is repeated, and the optimum route from the starting point to the destination is finally set as the guide route.

  This guide route is specified as a node ID and link ID string from the departure point to the destination, and is set as a guide route by accessing the node information and link information of the drawing data based on the node ID and link ID string. The selected node and link are highlighted on the road map displayed on the display 10.

  The cost of each node of the route and the cost of each link at the time of searching for the guide route are obtained by calculation based on the node information and link information in the route data, and the cost of the node is stored in the RAM 83. The node cost is calculated by going straight through the node, turning right at the intersection, passing left after passing the intersection, turning right after passing the bypass in the intersection area, or passing through the bypass in the intersection area. When making a left turn after passing, it is obtained by multiplying a predetermined value by a coefficient corresponding to the road type, road width, right / left turn angle, and the like. The link cost is calculated using the following equation.

  Link cost = link length × road width coefficient × road type coefficient × road left / right coefficient. Here, the road width coefficient and the road type coefficient are set to predetermined values according to the road width and road type obtained from the link information by the control circuit 8. The road left / right coefficient is a coefficient indicating whether the destination is on the right side or the left side, and is calculated and set based on the relationship between the destination and the road.

  The node cost and the link cost stored in the RAM 83 as described above are read when the control circuit 8 selects one path from the plurality of paths, and the path with the smaller total cost is selected.

  With reference to FIG. 2, the dynamic facility selection display process at the time of route search and when traveling according to the searched route will be described. This process is included in the navigation program 21p and is repeatedly executed together with other processes of the navigation program 21p. First, when a departure place (current position in the example of FIG. 2) and a destination are set by operation of the operation switch group 7, the remote control terminal 12, the touch panel 22 or voice input from the microphone 31, map data is set (S1). Based on the network information in the route data included in 21m, the guide route from the departure point to the destination is sequentially searched (S2).

  While the vehicle is traveling, the communication unit 25 has a predetermined time period or a predetermined travel distance, or a book around the guide route at a predetermined timing such as when there is a user operation input (reception request operation). The facility information including the incidental information of the invention is received (S3). The received facility information is stored in a reception data buffer whose area is secured in the RAM 83.

  Then, the contents are compared with the facility information received at the previous reception timing stored in the facility information storage area in which the area is secured in the RAM 83, and it is checked whether the information has been updated. If the information is not updated (S4: No), it is checked whether or not the vehicle has moved a predetermined distance. If not (S5: No), the process returns to step S3 and the next step Wait for reception of facility information.

  FIG. 3 shows an example of facility information. The facility information includes the facility name, the location of the facility, and incidental information. The incidental information includes data related to availability of the facility. Further, supplementary information (remarks) of supplementary information is added as necessary. Moreover, you may include other facilities, such as a sports facility, an amusement facility, etc., or a place where a user goes frequently as a target facility.

  Returning to FIG. 2, when the information is updated (S4: Yes) or when the vehicle has moved a certain distance (S5: Yes), it is designated in advance between the current position of the vehicle and the destination. In the target facility of the type, a facility where a vehicle that can enter directly from the lane on the vehicle traveling direction side can be placed is searched (S6). In the case of a left-handed road, the target facility on the left side in the direction of travel is a facility that can be placed sideways. Further, the storage content of the facility information storage area is updated (overwritten) with the content of the facility information stored in the reception data buffer of the RAM 83.

  The type of the target facility can be specified by the user. For example, a setting menu screen as shown in FIG. 4A is displayed on the display 10 by the operation of the operation switch group 7, the remote control terminal 12, the touch panel 22, or the voice input from the microphone 31, and the target facility is designated. As shown in FIG. 4A, the target facility can be specified by either the type of facility or the facility (name).

  When the “type designation” button is clicked on the display screen of FIG. 4A, the screen of FIG. 4B is displayed. For example, after the button of the type to be designated such as “parking lot” is pushed, the “decision” button is pushed. . Multiple types can be specified. The designated content is stored in the database 21d or a predetermined area of the memory 9. When the “facility designation” button is clicked on the display screen of FIG. 4A, the screen of FIG. 4C is displayed, and the facility can be designated. The facility designation method is the same as the destination designation method.

  Returning to FIG. 2, the facility information (accompanying information) is referred to, and the available facilities are searched from the searched target facilities (S7). Then, a search is performed by narrowing down a certain number from the searched target facilities in order of distance from the destination or guide route (S8, details will be described later). Then, a guidance route to the searched target facility is searched and displayed on the road map image displayed on the screen of the display 10 together with the guidance route (S9).

  Further, guidance regarding these target facilities may be performed by sending a voice message from the speaker 15.

  In the example of FIG. 3, the available facilities are a parking lot that is not full, a movie theater that is not closed, a regular holiday, and a restaurant that is not full.

  Returning to FIG. 2, it is determined whether or not the destination has been finally reached. If the destination has been reached (S10: Yes), this processing is terminated.

  The target facility search process corresponding to step S8 in FIG. 2 will be described with reference to FIG. First, the location of the target facility is referred to (S61), and the map data 21m is used to check whether the target facility is on the guidance route. If the target facility is present on the guidance route (S62: Yes), this is regarded as the primary layable facility of the present invention, and the distance to the destination is calculated (S64). In addition, when the target facility is not on the guide route but is within a certain distance from the destination and exists on a branch road that branches from the middle or end of the guide route (S63: Yes), this The distance between the target facility and the destination is calculated as the secondary layable facility of the invention (S64).

  The above-described processing is performed for all target facilities searched in step S7 of FIG. 2 (S65), and sorting is performed in order from the closest destination based on the calculated distance (S66). Of course, if the target facility is not located on the guide route or on the branch route that branches from the end or the end of the guide route, the calculation of the distance is not performed (distance: may be infinite), and the object to be sorted Don't be.

  A dynamic facility selection display when a parking lot is designated as a target facility will be described with reference to FIGS. 6A and 6B. The current position of the vehicle is indicated by Q and the destination is indicated by G. In FIG. 6A, there are seven parking lots P1 to P7, but the parking lot P1 is behind the vehicle and is not a search target. Further, the facility search range is set to a certain angle range set to less than 180 ° on the side where the vehicle traveling direction is expected with the current position Q of the vehicle as the angle center, and is preferably included in the range of 120 °. The target facility is preferentially searched as a candidate for the layable facility. In the example of FIG. 6A, first, the parking lots P2 to P7 are searched.

  According to the received facility information (FIG. 3) including the empty vehicle information of the present invention, only the parking lot P6 is full. Among the parking lots P2 to P5, a parking lot that can be laid between the current position Q and the destination G, and the parking lot on the guide route branches from the parking lot P3, in the middle or at the end of the guide route. The parking lots that can be placed on the branch road are the parking lots P2 and P5. The parking lot P5 can be placed sideways by turning right at the intersection in front. Since the parking lot P7 is not located between the current position Q and the destination G, it is not included in the parking lot that can be installed at the present time.

  Therefore, on the display device 10, the parking lots P2, P3, and P5 are displayed as, for example, a double frame or a thick frame for easy identification as a parking lot that can be placed sideways. Other parking lots that have vacancy (parking lots P4 and P7) are normally displayed (single frame or thin frame), and those that are full (parking lot P6) are displayed in broken lines. Further, whether or not it can be placed horizontally may be identified by changing a display color or a display pattern (for example, blinking). Moreover, it is good also as non-display other than the parking lot which can be laid (parking lots P4, P6, P7).

  In addition, the target facility (in this case, the parking lot) is displayed so as to be distinguishable from other facilities. For example, as shown in FIGS. 6A and 6B, a movie theater (expressed as “movie”) or a restaurant (expressed as “re”) is displayed with a broken-line frame or displayed with a light color tone.

  As shown in FIG. 6B, when the vehicle approaches the destination G, the parking lot P2 behind the vehicle is excluded from the search target, and the parking lot P7 on the branch road newly branched from the end of the guide route can be placed sideways. Included in the parking lot. At this time, the parking lots P3, P5, and P7 are displayed as, for example, a double frame as a parking lot that can be placed sideways. The display is the same as in FIG. 6A. The destination and the route to the parking lot that can be laid out are highlighted.

  In addition, when the destination is not set, the temporary destination can be determined by changing the travel locus of the vehicle or the scale of the map display, and the facility that can be placed on the temporary destination can be searched.

  First, the process of determining a temporary destination from the travel locus of the vehicle will be described using FIG. When the destination is not set (S21: No), the vehicle travel locus stored in the memory 9 or the HDD 21 is referred to. If a predetermined trajectory pattern such as “360 ° turn” is detected in the travel trajectory of the vehicle (S22: Yes), the trajectory pattern is detected from the travel trajectory data of the vehicle and the link information. Check the type of road that was used. If the type of road from which the trajectory pattern is detected is not a general road (S23: No), it is considered that the vehicle has traveled on a rampway or loop road on an expressway, and thus this processing is terminated.

  On the other hand, if the type of road from which the trajectory pattern is detected is a general road (S23: Yes), whether the turn is a result of searching for the destination by extracting the turning shape from the vehicle's running trajectory. It is determined whether or not (S24). Whether it is for searching for a destination is determined by whether the turning radius and the size of the turning range are below a predetermined threshold. If the turning radius or turning size is below a predetermined threshold (S25: Yes), a point corresponding to the center of the shape is determined as a temporary destination (S26).

  FIG. 8 shows an example of the travel locus. The traveling locus R includes a rectangular closed locus that goes around the block once. At this time, the vehicle is turning 360 °, and the turned road is a general road. In this rectangular trajectory pattern, when the horizontal distance L1 and the vertical distance L2 in FIG. 8 are each less than a predetermined threshold value, it is determined that the destination is searched for inside the rectangular traveling trajectory. Then, the coordinates of the center of the rectangle are obtained with reference to the map data 21m, and the coordinates are determined as the temporary destination Z. Since the shape of the closed locus is not necessarily a rectangle, the center may be obtained by approximating a circle, an ellipse, or a polygon.

  Processing for determining a temporary destination by changing the scale of the map display will be described with reference to FIGS. 9 and 10A to 10E. When the destination is not set (S41: No), the map display scale is reduced by pressing the “wide area” button (see FIG. 10E) on the map screen display of the display 10 by operating the operation switch group 7 or the like. Is changed, and it is checked whether or not the wide area display mode including the current position Q of the vehicle as shown in FIG. 10A has been entered.

  When the wide-area display mode is set (S42: Yes), the map displayed as shown in FIG. 10A is scrolled (moved) to a different visual field by the operation of the operation switch group 7 or the like, and displayed as shown in FIG. 10B. Find out if it was done. When the displayed map is scrolled (S43: Yes), it is checked whether or not the scale of the map displayed after scrolling has been changed to a certain enlargement direction.

  When the “enlarge” button is pressed on the display screen of FIG. 10B and the map display is enlarged as shown in FIG. 10C, it is displayed by operating the operation switch group 7 or the like in (S44: Yes). Find out if the map is scrolled.

  When the map display is scrolled from FIG. 10C to FIG. 10D, it is checked whether or not the display returns to the display centered on the current position Q of the vehicle by operating the operation switch group 7 or the like (S45: Yes).

  When the “current position” button is pressed when the display of FIG. 10D is made (S46: Yes), it can be determined that the user has confirmed the destination on the map. The center facility S is determined as a temporary destination (S47). Thereafter, the display returns to the center of the current position Q of the vehicle as shown in FIG. 10E (S48).

  Although the embodiments of the present invention have been described above, these are merely examples, and the present invention is not limited to these embodiments, and the knowledge of those skilled in the art can be used without departing from the spirit of the claims. Various modifications based on this are possible.

The block diagram which shows the structure of the travel route guide apparatus for vehicles. The flowchart explaining a dynamic facility selection display process. The figure which shows an example of facility information. The figure which shows the example of a screen display at the time of target facility designation | designated. The figure which shows the example of a screen display at the time of the object facility designation | designated following FIG. 4A. The figure which shows the example of a screen display at the time of the object facility designation | designated following FIG. 4B. The flow figure explaining object facility search processing. The figure which shows the example of a screen display of a dynamic facility selection display process. The figure which shows the example of a screen display of the dynamic facility selection display process following FIG. 6A. The flowchart explaining the process which determines a temporary destination from the driving | running | working locus of a vehicle. The figure which shows an example of a driving | running | working locus | trajectory. The flowchart explaining the process which determines a temporary destination by the change of the scale of a map display. The figure for demonstrating the process of FIG. The figure for demonstrating the process of FIG. 9 following FIG. 10A. The figure for demonstrating the process of FIG. 9 following FIG. 10B. The figure for demonstrating the process of FIG. 9 following FIG. 10C. The figure for demonstrating the process of FIG. 9 following FIG. 10D.

Explanation of symbols

1 Position detector (position detection means)
7 Operation switch group (Destination setting means)
8 Control circuit (guide route search means, traveling direction detection means, facility search means, layable facility search means, temporary destination determination means)
10 Display (Road map display means, search result output means)
12 Remote control terminal (Destination setting means)
15 Speaker 21 Hard disk device (HDD) (running track storage means)
21d database 21m map data (map data storage means)
22 Touch panel (Destination setting means)
25 Communication unit (Attached information receiving means)
31 Microphone (Destination setting means)
100 Traveling route guidance device for vehicle

Claims (14)

Map data storage means for storing road map data;
Guidance route search means for searching for a guidance route to the destination on the road map data;
A road map display means for displaying together with a guidance route searched images of the road map on the basis of the road map data,
A traveling direction detecting means for detecting a traveling direction of the vehicle on the guide route;
Position detecting means for detecting a current position of the vehicle;
In a state where the road map is scrolled to another visual field separated from the current position and the display magnification is enlarged to a certain level or more, a temporary destination is determined within the enlarged map visual field. A determination means;
On the road map data, a facility search means that regards the temporary destination as the destination and searches for a target facility of a pre-specified type existing around the destination ;
Among the searched target facilities , if the road is a left-hand traffic, search for the one on the left side of the traveling direction of the vehicle, or if the road is a right-hand traffic, search for the one on the right side of the traveling direction of the vehicle, A layable facility searching means for specifying the position of the searched object as a layable facility ,
Search result output means for displaying a search result by the laterally available facility search means on the road map;
A vehicular travel route guide device comprising:   The vehicular travel route guide device according to claim 1, wherein the search result output means displays the searched layable facility so as to be distinguishable from other target facilities. The layable facility that can be directly entered from a lane on the vehicle traveling direction side of the guide route is set as a layable facility, and the layable facility search means starts from the destination when the layable facility does not exist. When the vehicle is entered into the target facility existing within a certain distance and branched from the middle or end of the guide route, the vehicle can enter directly from the lane on the vehicle traveling direction side of the branch route. To search for facilities that can be installed next to
The vehicle travel route guidance device according to claim 1 or 2, wherein the search result output means displays the searched secondary layable facility so as to be distinguishable from other target facilities. The layable facility search means searches the branch data on the map data to reach the secondary layable facility together with the secondary layable facility,
The vehicle travel route guide device according to claim 3, wherein the search result output means displays the branch route together with the guide route on the road map. The facility search means is an object that is ahead of the current position of the vehicle and ahead of the destination in the direction of travel when the vehicle approaches a predetermined distance from the destination. The vehicle travel route guide device according to any one of claims 1 to 4 , wherein a facility is preferentially searched as a candidate for the layable facility . The facility search means preferentially searches for a target facility within a certain angle range set to be less than 180 ° as a candidate for the layable facility on the side where the traveling direction of the vehicle is expected with the current position as the angle center. The vehicle travel route guide device according to any one of claims 1 to 5 .   The search result output means preferentially displays the closest one to the destination on the road map when there are a plurality of found layable facilities. The vehicle travel route guide device according to the item. Attached information receiving means for receiving incidental information related to availability of the target facility ,
8. The search result output unit according to claim 1, wherein, based on the incidental information, only the currently available facilities among the layable facilities are displayed on the road map so as to be identifiable. The vehicle travel route guidance apparatus according to the description. The target facility is a parking lot,
The incidental information includes empty vehicle information of the parking lot,
The vehicle travel route guidance device according to claim 8, wherein the search result output means displays only a parking lot of an empty vehicle in the parking lot.   10. The search result output means displays the horizontal installation facility together with other target facilities so that the display states of the horizontal installation facility and the other target facility are different from each other. The vehicle travel route guidance device according to claim 1.   The vehicle travel route guide device according to claim 10, wherein the search result output unit hides target facilities other than the layable facility. Destination setting means for setting the destination on the road map based on user input,
The vehicle according to any one of claims 1 to 11, wherein the layable facility searching means searches the layable facility existing around a set destination on the road map data. Travel route guidance device. A traveling locus storage means for storing the traveling locus of the vehicle;
The temporary destination determining means determines a temporary destination satisfying a certain positional relationship with the trajectory pattern portion when a predetermined trajectory pattern is detected in the stored travel trajectory ,
The alongside possible facility searching means, on the road map data, in any one of alongside possible facility is to explore the claims 1 to 12 existing around the determined the temporary destination The vehicle travel route guidance apparatus according to the description. The trajectory pattern is defined as a trajectory pattern closed within a predetermined distance,
The vehicular travel route guide device according to claim 13, wherein the temporary destination determination means determines a temporary destination inside the closed locus pattern.

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