JP2008232646A - Navigation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigation system capable of discriminating on-street parking by an appropriate means, alarming drivers, and appropriately guiding users to parking locations. <P>SOLUTION: When an ACC power supply is operated and turned off, an ACC detection part 15 detects this and instructs a control part 11 to execute a program. A current position detecting part 14 detects the current position and determines whether the current position is inside facilities or is in a parking lot, on the basis of map data stored in a map data part 17. When it is determined that the current position is neither in facilities nor in a parking lot, the navigation system 10 determines that the current position is on-road parking and issues an alarms to a driver. Then the navigation system 10 searches for parking lots close to the current position, and a route search part 16 searches for the optimal route from the current position to the parking lots and performs route guidance for the driver. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a navigation device that searches for an optimum route from a departure place to a destination and displays a guidance route on a map image for guidance, and in particular, avoids on-street parking and guides parking to a parking lot. The present invention relates to a navigation device that can be used.

  Conventionally, in the field of navigation devices, navigation devices using GPS (global positioning system) are known. In other words, the navigation device includes a GPS receiver to receive radio waves from GPS satellites, thereby detecting the current position. The detected current position is subjected to map matching processing with predetermined map data, and the position on the map is grasped. When the user specifies a destination on the map, the navigation device searches for the shortest route from the current position to the destination using an algorithm called Dijkstra method or label determination method, and guides the route to the user. . Such a navigation device is mounted on a car and used as a so-called car navigation system that provides route guidance to a driver.

  By the way, in recent years, the enforcement of the enforcement of illegal parking has been strengthened, such as entrusted to the private sector, and awareness of on-street parking has increased compared to the past. Here, as an example in which it is possible to notify the driver that the parking position is in a parking prohibited area, the invention of “Vehicle Parking Violation Prevention Device” is disclosed in the following Patent Document 1 (Japanese Patent Laid-Open No. 2002-243455). Has been.

  According to the present invention, parking is determined when all of the three conditions that the vehicle speed is zero, the automatic transmission is in the P range, and the parking brake is applied are satisfied. At this time, based on the vehicle position detected by the position detector and the road map data, it is determined whether or not the vehicle position is in a parking prohibited area in accordance with the Road Traffic Law.

  In this case, if the parking position falls within 5 m from the side edge of the intersection or the turning angle of the road, or the width of the road at the parking position falls below a predetermined value, it is determined that the vehicle is in a parking prohibited area. When it is determined that the vehicle is in the parking prohibited area, the driver is notified of the current vehicle position being in the parking prohibited area by display and synthesized voice.

According to the present invention, since it is calculated based on the conventional road map data whether or not the vehicle is in a parking prohibited area, the amount of data is increased unnecessarily without adding the parking prohibited area data to the road map data. There is nothing. Moreover, since the structure with which the conventional car navigation apparatus is provided is used, there is an excellent effect that the structure is easy and inexpensive.
JP 2002-243455 A

  However, the invention disclosed in Patent Document 1 has a problem in the method of determining parking. Certainly, it is reasonable to judge that the vehicle is parked when the vehicle speed is zero, the automatic transmission is in the P range, and the parking brake is applied. However, for example, it is common for a driver to receive a mobile phone call and temporarily stop on the shoulder to make a call. In this case as well, the above three conditions may be satisfied, and it is a premature decision that parking is determined at this point.

  In the first place, parking means stopping the vehicle continuously, or stopping when the driver is away from the vehicle and cannot immediately drive. On the other hand, stopping means stopping of a vehicle other than parking, and stopping in a short time when the driver can drive immediately corresponds to stopping. Therefore, parking should not be determined when the vehicle is temporarily stopped and talking on a mobile phone, when the navigation device is operated, or when the vehicle is simply in an idling state.

  In addition, there are a wide range of parking prohibited areas under the Road Traffic Law, and in addition to what is disclosed in Patent Document 1, various places such as places with signs, near the top of hills, and tunnels are prohibited from parking and stopping. . Furthermore, parking is prohibited on most roads in central Tokyo.

  Therefore, if the parking position falls within 5m from the side edge of the intersection or the road corner, or the road width of the parking position falls below a predetermined value, it is determined that the vehicle is in a parking prohibited area. It is not enough as a warning against illegal parking. Further, although warnings regarding illegal parking have been taken, no measures have been taken for subsequent users.

  Basically, in order to protect the safety of pedestrians, it is basically a rule not to park or stop on the road as much as possible regardless of whether it is a parked or stopped area or a general area. Even on roads that are not parking-prohibited areas, parking / stopping not only congests nearby traffic but also causes jump-out accidents, and accidents often occur when the driver gets off, which is dangerous. Accordingly, the driver is required to park in a predetermined parking lot as much as possible, and the navigation apparatus should be expected to contribute to improving the manners of the driver, which is a problem to be solved.

  As a result of various studies to solve the above problems, the inventor of the present application determines that parking is performed when an operation to turn off the navigation device is performed, and further warns the user regardless of the parking prohibited area of the parking position. The present invention has been completed with the idea that the above-mentioned problems can be solved by performing the above.

  That is, the present invention aims to solve the above-mentioned problems, and provides a navigation device capable of discriminating road parking by appropriate means, warning the driver, and further appropriately guiding the parking location to the user. It is intended to provide.

In order to solve the above-mentioned problem, the invention according to claim 1 of the present application is
A map data part storing map data, a current position detecting means for detecting the current position, and a desired destination from the current position detected by the current position detecting means based on the map data stored in the map data part In a navigation device provided with a route search means for searching for an optimum route up to and a notification means,
The navigation device further includes a current position determination unit. When an operation to turn off the power of the navigation device is performed, the current position detection unit detects the current position, and the current position determination unit is stored in the map data unit. Determine whether the current position is on the road based on the map data,
When the current position determining means determines that the current position is on a road, the notification means notifies the fact that the vehicle is parked on the road.

The invention according to claim 2 of the present application is the navigation device according to claim 1,
After the notification, the navigation device searches the nearest parking lot from the current position based on the map data stored in the map data section, and the route search means searches for the optimum route to the parking lot. It is characterized by guiding the optimum route.

  According to the invention of claim 1, since the navigation device determines that the vehicle is parked by performing an operation to turn off the power, the power of the navigation device is not turned off when idling or temporarily stopping. It is possible to appropriately determine that the vehicle is parked. Further, if the current position determining means determines that the current position is in the facility or the parking lot based on the current position detected by the current position detecting means and the map data stored in the map data section, it is determined that parking is on the road. The parking on the road can be determined with a very simple configuration, and the driver can be alerted accurately.

According to the invention according to claim 2, after warning the driver that the parking is on the road, in order to search for the nearest parking lot and guide the optimum route to the parking lot,
As a driver, it is easy to move to the parking lot while avoiding on-street parking, and convenience is improved.

  The invention of the navigation device according to the present invention will be described in detail below with reference to the drawings. However, the example shown below shows the best embodiment, and is not intended to limit the technical idea of the present invention to the invention of the navigation device, and may be accompanied by various other changes. .

  FIG. 1 is a block diagram showing a configuration of a navigation device according to an embodiment of the present invention. The navigation device 10 includes a control unit 11, an input unit 12, a display unit 13, a current position detection unit 14, an ACC detection unit 15, a route search unit 16, a map data unit 17, a speaker 18, and the like.

  The control unit 11 includes a microprocessor having a RAM, a ROM, and a processor, and controls the operation of each unit by a program stored in the ROM. The control unit 11 also determines whether or not the current position is on a road in the map data based on the current position information (latitude and longitude) detected by the current position detection unit 14, or whether the current position is in a facility or a parking lot. It has a function as current position discriminating means for discriminating whether or not.

  The input unit 12 includes operation keys and the like provided on the casing of the navigation device 10 and is connected to the control unit 11 for inputting various operation commands. The display unit 13 includes a liquid crystal panel and displays map data, a guide route, and the like based on image data output from the control unit 11.

  Furthermore, when the display unit 13 is equipped with a touch panel, the display unit 13 also functions as a part of the input unit 12. The current position detector 14 includes a GPS receiver (not shown), and the antenna 19 receives a radio wave from a GPS satellite and detects a current position including longitude / latitude information by satellite navigation. When the current position is detected by the current position detection unit 14, the control unit 11 performs a matching process between the current position and the map data stored in the map data unit 17, and specifies a position on the map.

  The map data unit 17 stores facility data and parking lot data in addition to map data and road data. The map data may be obtained from an external disk medium such as a DVD, or may be configured to read map data stored in a mass storage device such as an HDD (hard disk drive) provided therein. .

  The route search unit 16 searches for an optimum route from the departure point to the destination based on the road data stored in the map data unit 17 based on the departure point and the destination input by the user via the input unit 12. For example, the route having the minimum cost under various conditions such as the route having the shortest distance and the route having the shortest required time is extracted. The speaker 18 is an audio output unit for notifying route guidance by voice.

  The navigation device 10 further includes an ACC detection unit 15. The ACC detection unit 15 detects whether or not an operation for turning off the ACC power supply of the navigation device 10 is performed. When the operation is detected, the control unit 11 Directs program execution.

  The navigation device 10 is mounted on a vehicle and activated by receiving power supply from the vehicle battery. The navigation device 10 is activated by turning on the ACC power supply, and the power supply to the navigation device 10 is stopped by turning off the ACC power supply. When the user turns off the ACC power supply of the navigation device 10 during parking, the ACC detection unit 15 instructs the control unit 11 to execute the program, and the control unit 11 starts processing according to a predetermined program as described later.

  Since the process is started after the operation for turning off the ACC power is performed, it is necessary not to stop the power feeding immediately after the ACC power off operation but to continue the power feeding until the processing is completed. .

  Moreover, when the user parks, it is also conceivable that the ignition of the vehicle is turned off as it is without performing an operation of turning off the ACC power supply of the navigation device 10. In this case, if the power supply from the external power source is continued, the load of the vehicle battery increases, and in some cases, the vehicle may not be started due to overdischarge. Therefore, the navigation device 10 has a separate internal power source. You may comprise so that it may switch to an internal power supply by detecting an off ignition.

  Next, map data stored in the map data unit 17 will be described. The map data consists of display map data and network data necessary for route search.

  FIG. 2 is a diagram for explaining the basic concept of network data. As shown in FIG. 2 (1), the map is not captured only at intersections, but guidance information (for example, bridges) effective at the points between intersections. , Rivers, buildings, gas stations, etc.) are captured by the concept of nodes, and nodes are connected by the concept of links.

  Therefore, a node indicates point data of map coordinates, and an intersection is a part of the node, while a link indicates line data and indicates a part of the road. By constructing in this way, at the intersection shown in FIG. 2 (2), a mark as guidance information that is effective between the roads connecting the intersection number n and the preceding and following intersection numbers at the intersection (that is, between two intersections) is data. Can be given as

  FIG. 3 shows the column data of the node described above, and stores the attribute for distinguishing the east longitude and north latitude with respect to the node number, that is, the coordinates of the point and valid guidance information (eg, bridge, river, building, gas station, etc.) as data. ing.

  FIG. 4 shows an example of an intersection list, and its code number, intersection name, intersection number (number assigned to only the intersection among nodes), two connected node numbers, landmarks and attributes as described in FIG. 2 (2). Is stored.

  FIG. 5 shows an example of a parking lot list, which stores parking lot numbers, connecting intersection numbers, and coordinates. For example, in the parking lot indicated by the code number 1001, the position coordinates are indicated by latitude and longitude, and the intersection where the parking lot is connected is indicated by the intersection number.

  FIG. 6 shows an example of road data. As shown in FIG. 6 (2), roads are assigned road numbers with directionality, and the data shown in FIG. 6 (1) is stored for each road number. Has been. That is, for each road number, the node number of the start point and the end point, the next number among the road numbers having the same start point, the next number among the road numbers having the same end point, the thickness of the road, one-way traffic Stored are traffic prohibition information, such as vehicle prohibition information, the number of nodes, node string data, a head address, and the like.

  Next, operation | movement of the control part 11 of the navigation apparatus 10 is demonstrated with reference to a flowchart. 7 and 8 are flowcharts for explaining the operation of the navigation apparatus. The operation of the navigation device 10 includes a first process (FIG. 7) for determining whether or not the road is parked, and a second process (FIG. 8) for guiding the nearest parking lot after determining the road parking. .

  First, the first process will be described with reference to FIG. When an operation to turn off the ACC power is performed in step S11, the process is started. When the driver performs an operation to turn off a predetermined power switch of the navigation device 10, the ACC detection unit 15 detects this and instructs the control unit 11 to execute the program. When the signal is input, the control unit 11 supplies power only to the navigation function unit in step S12.

  The navigation function unit refers to a configuration necessary for navigation, such as the current position detection unit 14, the route search unit 15, and the map data unit 17. In step S <b> 13, the current position detection unit 14 receives radio waves from GPS satellites, detects the current position including latitude and longitude, and performs map matching processing with map data stored in the map data unit 17.

  In step S14, it is determined whether or not the current position on the map data is on the road. The map data unit 17 shown in FIG. 1 includes facility data and parking lot data, and determines whether the current position is in these facilities or the parking lot. If it is determined that the current position is in the facility or in the parking lot (Y in step S14), it is not on-street parking, so the process proceeds to step S16 without warning the driver, and the ACC power supply and the navigation apparatus 10 are turned off. To finish the process.

  On the other hand, if it is determined in the determination process in step S14 that the current position is not in the facility or the parking lot (N in step S14), the process proceeds to step S15 to warn the driver that the vehicle is parked on the road. As a warning method, for example, a message such as “Parking on the road. Please park in the parking lot” is displayed on the display unit 13 and the message is notified from the speaker 18 by voice. Then, the process proceeds to the second process.

  In the above embodiment, the warning method is to display a message on the display unit 13 and to notify a voice message from the speaker 18, but this is not restrictive. It is also possible to use either one of the message notifications by voice.

  Next, the second process will be described with reference to FIG. In the second process, after giving a warning in the process of step S15, the driver searches for the nearest parking lot and provides route guidance. First, based on the parking lot data stored in the map data unit 17 in step S21, a parking lot within a predetermined distance range from the current position, for example, within a radius of 500 m is extracted. For example, a parking lot with the shortest distance is identified from the extracted parking lots, and the shortest route to the parking lot is searched by the Dijkstra method.

  When the route search is completed, the process proceeds to step S22, where the display unit 13 displays the display map and the guidance route, and the speaker 18 informs by voice that the route guidance is started. The route guidance is performed in the same manner as normal navigation, and the traveling direction and guidance information at the intersection are displayed on the display unit 13 and also notified by voice from the speaker 18 to provide route guidance to the parking lot as the destination.

  When the route guidance is started, the process proceeds to step S23, and the ACC detection unit 15 determines whether or not an operation for turning off the ACC power is performed. If an operation for turning off the ACC power source is not performed (N in Step S23), the process returns to Step S23 again, and the processing is repeated until an operation for turning off the power source is performed.

  If it is detected in the process of step S23 that the driver has performed an operation to turn off the ACC power supply (Y in step S23), the process proceeds to the process of step S24, and whether the current position is in the facility or the parking lot as in step S14. It is determined whether or not. If the driver moves the vehicle to the nearest parking lot according to the route guidance, and the operation for turning off the ACC power supply of the navigation device 10 is performed, it is determined in step S24 that the driver moves to the nearest parking lot. (Y of step S24).

  In this case, the process proceeds to step S26, the power supply of the ACC power source and the navigation device 10 is stopped, and the process ends. As a driver, on-street parking can be avoided and route guidance is automatically made to the nearest parking lot, improving convenience.

  On the other hand, when it is determined in the determination process of step S24 that the current position is not in the facility or the parking lot (N in step S24), the navigation device 10 determines that the parking is on the road, and proceeds to the process of step S25. Warn the driver to that effect. As a warning method, for example, a message such as “Parking on the road. Please park in the parking lot” is displayed on the display unit, and the message is notified from the speaker 18 by voice.

  When a warning is given in step S25, the process returns to step S21, and the nearest parking lot is searched again from that point to start route guidance.

  According to the present invention, when the operation of turning off the power of the navigation device is performed, it is determined that the vehicle is parked, and a warning is given if the vehicle is parked on the road. Therefore, no warning is given when the vehicle is temporarily stopped such as idling. Therefore, it is possible to give an appropriate warning, and the driver's manners can be expected to be improved. In addition, after the warning is issued, the nearest parking lot is searched from the current location and route guidance is provided, so not only the warning but also the route until the driver parks in the parking lot can be known, improving convenience To do.

It is a block diagram which shows the structure of a navigation apparatus. It is explanatory drawing for demonstrating the data structure of the map data of a navigation apparatus. It is explanatory drawing for demonstrating the data structure of the map data of a navigation apparatus. It is explanatory drawing for demonstrating the data structure of the map data of a navigation apparatus. It is explanatory drawing for demonstrating the data structure of the map data of a navigation apparatus. It is explanatory drawing for demonstrating the data structure of the map data of a navigation apparatus. It is a flowchart explaining operation | movement of the 1st process of a navigation apparatus. It is a flowchart explaining operation | movement of the 2nd process of a navigation apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Navigation apparatus 11 Control part 12 Input part 13 Display part 14 Current position detection part 15 ACC detection part 16 Route search part 17 Map data part 18 Speaker 19 Antenna

Claims (2)

A map data part storing map data, a current position detecting means for detecting the current position, and a desired destination from the current position detected by the current position detecting means based on the map data stored in the map data part In a navigation device provided with a route search means for searching for an optimum route up to and a notification means,
The navigation device further includes a current position determination unit. When an operation to turn off the power of the navigation device is performed, the current position detection unit detects the current position, and the current position determination unit is stored in the map data unit. Determining whether the detected current position is on the road based on the map data,
A navigation device characterized in that, when the current position determining means determines that the current position is on a road, it notifies the notifying means that parking is on the road.   After the notification, the navigation device searches the nearest parking lot from the current position based on the map data stored in the map data section, and the route search means searches for the optimum route to the parking lot. The navigation device according to claim 1, wherein an optimum route is guided.

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