JP5052478B2 - Vehicle navigation device - Google Patents

Description

  The present invention relates to a vehicle navigation apparatus, and more particularly to a vehicle navigation apparatus that can determine a stop point of a vehicle.

Conventionally, what can determine the stop point of a vehicle is known as a navigation device for vehicles (for example, refer to patent documents 1). This vehicle navigation device detects a plurality of items when the vehicle stops, for example, the operation state of a parking brake, the on / off state of an accessory switch, the staying time at a stop point, the opening / closing state of a door, and the change in the number of passengers Based on this, the stop point of the vehicle is determined. Further, in this vehicle navigation apparatus, the stop point determination is made on condition that the accessory switch is turned off and the navigation apparatus is stopped.
JP 2007-10570 A

  However, in the vehicle navigation device disclosed in Patent Document 1, it is a condition for determining the stop point that the accessory switch is off. For this reason, when the point where the accessory switch is turned on (started up) and the point where it was turned off (finished) are common, in other words, the point where the navigation device is turned on and the point where it is turned off In the case of common use, there is a problem that it is not possible to determine a stop-off point.

  Therefore, an object of the present invention is to provide a vehicle navigation device that can determine a stop point of a vehicle even when an activation point that is a point where the navigation device is activated and an end point that is an end point are common. Is to provide.

  A vehicle navigation apparatus according to the present invention that has solved the above problems includes a current position acquisition unit that acquires a current position of a vehicle, an activation point storage unit that stores an activation point that is a current point at the time of activation, and an operation end point. When the end point storage means for storing the end point which is the current point and the start point and the end point are in common, the outgoing route and the return route where the vehicle has traveled are specified, and the stop point of the vehicle is specified And means.

  In the vehicle navigation apparatus according to the present invention, when the start point and the end point of the navigation apparatus are common, the forward path and the return path on which the vehicle has traveled are specified, and the stop point of the vehicle is determined. For this reason, even when the point where the navigation device is activated and the point where the navigation device is shared are common, the stop point of the vehicle can be determined.

  Here, the stop point specifying means may be configured such that, when the forward path and the return path are the same, the turning point in the range where the forward path and the return path are the same is determined as the stop point of the vehicle.

  When a vehicle travels, it often turns back after stopping at a stop. For this reason, when the forward path and the return path are the same, it is possible to determine the stop point of the vehicle with high accuracy by determining the turning point in the range where the forward path and the return path are the same as the stop point of the vehicle.

  In addition, the vehicle navigation apparatus according to the present invention that has solved the above problems includes a current position acquisition unit that acquires a current position of a vehicle, an activation point storage unit that stores an activation point that is a current point at the time of activation, and an operation end. Start when the end point storage means for storing the end point that is the current point of time, the travel route storage means for storing the travel route of the vehicle from the start point to the end point, and the start point and the end point are common Stop point determination means for determining a point farthest from the point as a stop point of the vehicle.

  When the vehicle travels, the point farthest from the starting point of the navigation device is often the stop point. For this reason, it is possible to determine the stop point of the vehicle with high accuracy by determining the point farthest from the start point as the stop point of the vehicle.

  According to the vehicle navigation device of the present invention, it is possible to determine the stop point of the vehicle even when the start point and the end point of the navigation device are common.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. For the convenience of illustration, the dimensional ratios in the drawings do not necessarily match those described.

  FIG. 1 is a block configuration diagram of a navigation device according to the present embodiment. As shown in FIG. 1, the navigation device according to this embodiment includes an ECU (Electronic control unit) 1. The ECU 1 is a computer mounted on a vehicle, and includes a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), an input / output interface, and the like.

  The ECU 1 has a calendar clock, and measures the staying time at the stop point as one of the vehicle states when the vehicle stops using the calendar clock. Further, when the stop point of the vehicle is determined to be a destination or a stop by the calendar clock, time information stored in association with the destination or the stop is given. The ECU 1 also includes a travel data storage unit 11 and a stop position estimation unit 12 that is a stop point specifying unit.

  Further, the ECU 1 is connected with a position detector 2, a map data input device 3, an operation switch group 4, an external memory 5, a display device 6, and various sensors 7.

  The position detector 2 includes a geomagnetic sensor 21, a gyroscope 22, a vehicle speed sensor 23 for calculating a travel distance, and GPS reception for GPS (Global Positioning System) that detects the position of the vehicle based on radio waves from a satellite. Machine 24. A GPS antenna 25 is attached to the GPS receiver 24. Since these sensors have errors of different properties, they are configured to be used while being complemented by a plurality of sensors.

  The map data input device 3 is a device that inputs various types of map data necessary for drawing a map to the ECU 1. The map data here includes road data composed of node data and link data, background data indicating terrain, character data for displaying place names, and the like. The map data input device 3 includes a storage medium that stores map data. As a storage medium for storing map data, a CD-ROM, a DVD-ROM, a hard disk or the like is generally used depending on the amount of data to be stored.

  The operation switch group 4 is configured as a touch switch or a mechanical switch integrated with the display device 6. Each switch in the operation switch group 4 is used for various inputs. The external memory 5 has a readable / writable storage medium such as a memory card or a hard disk, and is used for storing data such as text data and image data.

  The display device 6 is constituted by a liquid crystal display, for example. The screen of the display device 6 is generated by the processing of the ECU 1 by, for example, the vehicle position mark corresponding to the current position of the vehicle input from the position detector 2 and the map data input from the map data input device 3. A road map around the vehicle is displayed.

  Various sensors 7 serving as vehicle state detection sensors include sensors that detect various vehicle states when the vehicle is stopped. Specifically, a parking brake sensor that detects an operation state of a parking brake, an accessory switch sensor that detects an on / off state of an accessory switch (ignition switch), a door opening / closing sensor that detects opening / closing of each door of the vehicle, A seating sensor that detects whether or not an occupant is seated in each seat is included.

  The travel data storage unit 11 in the ECU 1 stores start-up data, end-time data, and a travel route. As the start position data, start point data including start date information when the accessory switch is turned on and start point information including latitude and longitude is stored. As the end time data, end point data including end date and time information when the accessory switch is turned off and end point information including latitude and longitude are stored. Further, a link record (link ID), a road type, and a link length are stored as the travel route.

  The stop position estimation unit 12 estimates the stop point of the vehicle from the start point data, end point data, and travel route stored in the travel data storage unit 11.

  Next, processing of the vehicle navigation device according to the present embodiment will be described. The navigation device according to the present embodiment is activated by turning on the accessory switch of the vehicle, and ends by turning off the accessory switch. In addition, the driver performs guidance to a destination input by operating the operation switch, and provides information about the environment of the road on which the vehicle travels. In the ECU 1, the stop position estimation unit 12 estimates and determines the stop position (stop point) of the vehicle. Hereinafter, the procedure of the estimation process of the stop position will be described.

  FIG. 2 is a flowchart showing a procedure of the process of estimating the stop position. As shown in FIG. 2, the estimation of the leaning position is started in the ECU 1 by turning on the accessory switch. When estimating the stop position, first, start point data is acquired (S1) and stored in the travel data storage unit 11. Here, the date and time when the accessory switch is turned on and the latitude and longitude of the position of the vehicle when the accessory switch is turned on are stored as the activation point data.

  Next, it is determined whether or not the accessory switch is turned off (S2). As a result, if it is determined that the accessory switch is not turned off, a travel route is acquired (S3), and the process returns to step S2. Thus, after the accessory switch is turned on, the travel route of the vehicle is stored one by one until the accessory switch is turned off.

  On the other hand, if it is determined that the accessory switch is off, end point data is acquired (S4) and stored in the travel data storage unit 11. Here, the date and time when the accessory switch is turned off and the latitude and longitude of the position of the vehicle when the accessory switch is turned off are stored as end point data.

  Subsequently, the stop position estimation unit 12 compares the start point data and the end point data stored in the travel data storage unit 11 to determine whether the point where the accessory switch is turned on is different from the point where the accessory switch is turned off. Is determined (S5). Here, when it is determined that the point where the accessory switch is turned on is different from the point where the accessory switch is turned off, the distance between the two points is less than the predetermined threshold in addition to the case where the two points do not match. It can also be included when it is larger.

  As a result, when it is determined that the point where the accessory switch is turned on is different from the point where the accessory switch is turned off, the point where the accessory switch is turned off is set for the purpose (S6). The estimation process ends. On the other hand, if it is determined that the point where the accessory switch is turned on is not different from the point where the accessory switch is turned off and the two points are not common, it is determined whether the door has been opened or closed (S7). This determination is made based on whether an open / close signal is transmitted from the door open / close switch.

  As a result, when an open / close signal is transmitted from the open / close switch and it is determined that the door has been opened / closed, a point where the door has been opened / closed is set as a stop position (S8). On the other hand, if the open / close signal from the open / close switch is not transmitted and it is determined that the door has not been opened / closed, whether or not the forward route and the return route are the same with reference to the travel route acquired in step S3. Is determined (S9).

  Here, for example, when the door opening / closing switch is not provided in the vehicle or the opening / closing signal is not transmitted because the door opening / closing switch is out of order, the process proceeds to step S9. Also, in determining whether the outbound route and the inbound route are the same, when the overlapping route is traveling in the opposite direction, the outbound route and the inbound route are routed for the overlapping route. Are the same.

  As a result of the determination in step S9, when it is determined that the forward route and the return route are not the same, the position farthest from the departure point is set as the stop position (S10), and the stop position estimation process is terminated. On the other hand, if it is determined that the route of the forward path and the return path are not the same, the turning point of the forward path and the return path is set as a stop position (S11), and the stop position estimation process is terminated.

  As described above, in the navigation device according to the present embodiment, the forward path and the return path on which the vehicle has traveled are specified, and the stop position of the vehicle is estimated. For this reason, even if the point where the navigation device is activated and the point where the navigation device is finished are common, the stop position of the vehicle can be determined. In addition, the position farthest from the point where the accessory switch is turned on is estimated as the vehicle stop position. When the vehicle travels, since the position farthest from the position where the accessory switch is turned on is often the leaning position, the leaning position of the vehicle can be determined with high accuracy.

  Further, when the forward path and the return path are the same, the turn-back point in the range where the forward path and the return path are the same is estimated as the stop position of the vehicle. When the vehicle travels, the vehicle often turns back after stopping at the stop position, so the stop position of the vehicle can be determined with high accuracy.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. For example, in the above-described embodiment, the navigation device is activated when the accessory switch of the vehicle is turned on. However, the navigation device can be activated by providing a separate activation switch.

  Moreover, in the said embodiment, although only one stop position is set, it can also be set as the aspect which sets the stop position of several places. For example, when the outbound route and the return route are not the same, the farthest position from the departure point is set as the stop location, but when the outbound route and the return route are the same, the departure point and the return point are set. It can also be set as the aspect which sets the position farthest from the stop position.

It is a block block diagram of the navigation apparatus which concerns on this embodiment. It is a flowchart which shows the procedure of the estimation process of a stop position.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... ECU, 2 ... Position detector, 3 ... Map data input device, 4 ... Operation switch group, 5 ... External memory, 6 ... Display apparatus, 7 ... Vehicle state detection sensor, 11 ... Driving data storage part, 12 ... Stop Position estimation unit, 21 ... geomagnetic sensor, 22 ... gyroscope, 23 ... vehicle speed sensor, 24 ... receiver, 25 ... antenna.

Claims (3)

Current position acquisition means for acquiring the current position of the vehicle;
An activation point storage means for storing an activation point which is a current point at the time of activation;
End point storage means for storing an end point that is the current point at the end of operation;
When the start point and the end point are common, a stop point determination unit that determines a stop point of the vehicle by specifying a forward path and a return path on which the vehicle has traveled,
A vehicle navigation device comprising: The stop point judging means is:
2. The vehicle navigation device according to claim 1, wherein when the forward path and the return path are the same, a turning point in a range where the forward path and the return path are the same is determined as a stop point of the vehicle. Current position acquisition means for acquiring the current position of the vehicle;
An activation point storage means for storing an activation point which is a current point at the time of activation;
End point storage means for storing an end point that is the current point at the end of operation;
Travel route storage means for storing a travel route of the vehicle from the start point to the end point;
When the start point and the end point are common, a stop point determination means for determining a point farthest from the start point as a stop point of the vehicle,
A vehicle navigation device comprising:

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