JP5076617B2 - Car navigation system - Google Patents

Description

  The present invention relates to an in-vehicle navigation device that sequentially guides a plurality of destinations when a plurality of destinations are set.

  Conventionally, when a plurality of destinations are set by a user, an invention relating to a travel route guide device that sets a priority order for each destination and guides the travel route so that the vehicle can reach the destinations in the order of priority. Is disclosed (for example, see Patent Document 1).

  In addition, an invention is disclosed regarding a car navigation device that allows a user to set a plurality of destinations in the order of passage and guides a travel route so that the vehicle can reach the destinations in the order of the set passages (for example, Patent Documents). 2).

In addition, when one of the set destinations is reached, the destination is deleted from the display image and the predicted arrival time to another destination is displayed. An invention about a navigation device is disclosed (for example, see Patent Document 3).
JP-A-8-94374 Japanese Patent Laid-Open No. 8-17885 JP 2006-322806 A

  In the devices described in Patent Documents 1 and 2, there is no description as to which method is used to determine whether or not the destination has been reached. In this regard, as described in Patent Document 3, when the current position of the host vehicle specified by GPS (Global Positioning System) and the destination (more specifically, the coordinates of the destination) match, It can be usually assumed by those skilled in the art that it is determined that the destination has been reached, and it is considered that the devices described in Patent Documents 1 and 2 are assumed to use the same method.

  However, when determining whether or not the current position of the host vehicle and the coordinates of the destination coincide with each other and only whether or not the destination has been reached, the determination is made accurately depending on the geographical conditions of the destination. It may not be possible.

  The present invention is for solving such problems, and a main object thereof is to provide an in-vehicle navigation device capable of more accurately determining whether or not a vehicle has reached a destination. .

  One aspect of the present invention for achieving the above object is an in-vehicle navigation device capable of setting a plurality of destinations to be sequentially guided, and whether or not a destination is reached among a plurality of destinations. The arrival determination means includes a determination unit that acquires geographical information about a destination to be determined, and uses different determination methods depending on the acquired geographical information. .

  According to this aspect of the present invention, since different determination methods are used depending on geographical information such as a facility set as a destination, it is possible to more accurately determine whether or not the destination has been reached. .

  In one aspect of the present invention, the arrival determination means classifies destinations to be determined with respect to the ease with which it is determined that the destination has been reached based on the acquired geographical information, and different determination methods depending on the classification It is good also as what is characterized by using.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle-mounted navigation apparatus which can determine more correctly whether the vehicle arrived at the destination can be provided.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the accompanying drawings.

  Hereinafter, an in-vehicle navigation device 1 according to an embodiment of the present invention will be described.

[Constitution]
FIG. 1 is a diagram illustrating an example of the overall configuration of the in-vehicle navigation device 1. The in-vehicle navigation device 1 includes a GPS receiver 10, a memory 20, an HMI (Human Machine Interface) 30, a vehicle speed sensor 40, an ignition switch 45, and a navigation computer 50 as main components. In addition, the arrow in a figure shows the flow of the main information communication performed using appropriate communication protocols, such as CAN (Controller Area Network), BEAN, AVC-LAN, and FlexRay.

  The GPS receiver 10 receives a radio signal including satellite orbit and time data from a GPS satellite and outputs the radio signal to the navigation computer 50.

  The memory 20 is a storage medium such as an HDD (Hard Disc Drive), a DVD (Digital Versatile Disk), or a CD-ROM, and stores map information. In the map information, the road shape is expressed by node points representing intersections and the links connecting the node points, and the road width, the number of lanes, the road curvature, etc. in the section indicated by each link are related to the link. It is stored in association with each other. The map information includes names, coordinates, and geographical information of major buildings and place names, road names, leisure facilities, shopping facilities and the like (hereinafter referred to as “facility etc.”) that can be destinations.

  Geographic information is the distance from the coordinates of the size, facilities, etc. to the nearest link (ie, the distance to the road), whether the parking lot is in another location, whether it is a facility in a downtown area, etc. It is information indicating the geographical environment where the facility is placed, such as whether or not.

  The HMI 30 is a group of devices serving as an input / output interface between the user and the in-vehicle navigation device. For example, the HMI 30 displays an image, and as a touch panel, a display device configured to allow various input operations by the user, and voice input / output Consists of microphone, speaker, buzzer and so on.

  The vehicle speed sensor 40 includes, for example, a wheel speed sensor and a skid control computer attached to each wheel, and the skid control computer converts a wheel speed pulse signal output from the wheel speed sensor into a vehicle speed rectangular wave pulse signal (vehicle speed signal). To the navigation computer 50.

  The ignition switch 45 displays an ignition on signal as a vehicle start request signal, an ACC on signal as a vehicle system start signal, an ACC off signal as a vehicle system stop signal, and the like according to the driver's vehicle start operation. Output to 50.

  The navigation computer 50 is a computer unit in which, for example, a CPU, a ROM, a RAM, and the like are connected to each other via a bus, and other storage media such as an HDD (Hard Disc Drive) and a DVD (Digital Versatile Disk) I / O port, timer, counter, etc. are provided. The ROM stores programs and data executed by the CPU. The navigation computer 50 includes a destination setting unit 51, a current position specifying unit 52, and main function blocks that function when the CPU stores (executes) a program stored in the ROM and executes the program. The recommended route generation unit 53, the route guide unit 54, and the arrival determination unit 55 are provided.

  The destination setting unit 51 prompts the user to set a destination using the HMI 30. When the user sets a destination by voice or touch input, the destination setting unit 51 searches for this from map information and obtains the coordinates of the destination as a recommended route generation unit 53. And output to the arrival determination unit 55. In the in-vehicle navigation device 1 of the present embodiment, a plurality of destinations can be set at a time. In this case, the order of passing through the destination may be set by the user, or may be automatically determined by a predetermined algorithm based on the distance from the host vehicle or the like.

  The current position specifying unit 52 specifies the current position (latitude, longitude, altitude) of the host vehicle by a calculation based on the time difference of the radio signal received by the GPS receiver 10. In addition, the current position of the host vehicle is corrected based on outputs from various sensors such as the vehicle speed sensor 40 and the gyro sensor and various information received via the beacon receiver and the FM multiplex broadcast receiver. The current position of the host vehicle identified by the current position identifying unit 52 is output to the recommended route generating unit 53 and the arrival determining unit 55.

  The recommended route generating unit 53 generates a recommended route from the current position of the host vehicle specified by the current position specifying unit 52 to the destination output by the destination setting unit 51 using the Dijkstra method or the like, and a route guide unit To 54. This process is repeatedly executed according to the transition of the current position of the host vehicle. When the destination setting unit 51 outputs a plurality of destinations, first, a route with the earliest passing order is selected from the plurality of destinations to generate a recommended route, and then selected by the arrival determination unit 55 When it is determined that the destination has been reached, the destination having the next fastest passing order is selected to generate a recommended route (see FIG. 2).

  The route guidance unit 54 performs navigation display and voice guidance by the HMI 30 so that the host vehicle can travel along the recommended route generated by the recommended route generation unit 53. In other words, the HMI 30 is controlled so as to provide guidance for turning left and right at intersections, usage guidance for expressways, guidance that the destination is approaching, and the like.

  The arrival determination unit 55 determines whether or not the destination that has been selected at that time is reached by the recommended route generation unit 53 by a determination method described later. The data is output to the recommended route generation unit 53.

  By the above processing, if the driver travels according to the navigation display or voice guidance, it is possible to sequentially reach a plurality of initially set destinations.

[problem]
In order to determine whether or not the destination has been reached, it is usually conceivable to determine that the destination has been reached when the current position of the host vehicle matches the coordinates of the destination. In the example, such a method is a basic method. However, since the geographical environment where the facilities that can be the destination are placed is not uniform, the user actually wants to move to the next destination after using the facilities etc. There may be a case where route guidance to the destination is continued. Conversely, there may be a case where the user actually shifts to route guidance to the next destination even though the user does not yet use the facility as the destination. These inconveniences are thought to be mainly due to the fact that the ease with which it is determined that the destination has reached is different depending on the geographical environment where the facility that can be the destination is placed.

[Characteristic judgment processing]
Therefore, in this embodiment, the arrival determination unit 55 acquires geographical information (corresponding to “geographic information about the destination” in the claims) from the memory 20 such as the facility set as the destination. We decided to use different judgment methods depending on the geographical information.

  Specifically, for example, when using a basic method based on a comparison between the current position of the host vehicle and the coordinates of the destination, (1) a destination that is not easily determined to be reached, and (2) a destination that is easily determined. Classify as destination, (3) other destinations (average or normal destination). Then, arrival determination is performed for each by a different method.

  For example, facilities that are larger than a predetermined size, such as a facility that has a distance to the road that is greater than or equal to a predetermined distance, such as a facility that is located at a location where the parking lot is separated, are set as destinations. This is the case. In these cases, there is a high possibility that the position where the host vehicle is parked for visiting a facility or the like is far from the coordinates of the destination, so the current position of the host vehicle does not match the coordinates of the destination. This is because it may pass through the ground.

  The case (2) corresponds to, for example, a case where a facility or the like in a downtown area is set as a destination. In this case, it seems that the user is traveling around the destination without finding the destination even though the destination is sufficiently close (the current position of the vehicle and the coordinates of the destination match). It is because a special scene is assumed. When the next destination is selected in such a scene, guidance to the facility or the like that the user is still searching for is ended. Note that this classification (2) may be omitted, and classification may be made into two types: destinations that are difficult to determine as having arrived, and other destinations.

[Processing flow]
FIG. 3 is a flowchart showing the flow of processing when determining whether or not the destination has been reached using different determination methods according to the above destination classification. This flow is repeatedly executed after a plurality of destinations are set in the destination setting unit 51 until it is determined that the destination having the slowest passing order has been reached.

  First, the arrival determination unit 55 reads geographical information such as a facility set as a destination from the memory 20 (S100). Then, as described above, the destination is classified based on the geographical information (S102).

<When the destination is classified as (3)>
When the destination is classified as (3) an average or normal destination, the current position of the host vehicle specified by the current position specifying unit 52 matches the coordinates of the destination selected at that time. Whether the destination is reached or not, and outputs a signal to that effect to the recommended route generator 53 (S120). Note that “matching” does not have to be strictly matching, and may be regarded as matching when the distance is within a predetermined distance (the same applies hereinafter).

  When a signal indicating that the destination has been reached is input from the arrival determination unit 55, the recommended route generation unit 53 selects a destination with the next fastest passing order and generates a recommended route. And the process below S100 will be performed again. Note that when there is no destination with the next fastest passing order, that is, when all destinations have been reached, this flow ends.

<When the destination is classified as (1)>
When the destination is classified as (1) a destination that is difficult to determine as having arrived, first, as in (3), the current position of the host vehicle specified by the current position specifying unit 52 is It is determined whether or not it matches the coordinates of the destination selected in (S106). If they match, it is determined that the destination has been reached, and a signal to that effect is output to the recommended route generation unit 53. (S120).

  If the current position of the host vehicle does not coincide with the coordinates of the destination, whether or not an ACC on signal is subsequently input from the ignition switch 45, that is, whether or not the vehicle has changed from an ACC off state to an ACC on state. Is determined (S108). The fact that the vehicle has changed from the ACC off state to the ACC on state indicates that the user has performed the ignition operation. Thus, after the user gets off, he / she visits the destination and gets on again. It is estimated that the scene is about to start the vehicle. Therefore, it is determined that the destination has been reached, and a signal to that effect is output to the recommended route generation unit 53 (S120). Note that the determination in S108 may be replaced with a determination that determines whether or not the ACC-off signal is input from the ignition switch 45, that is, whether or not the vehicle has changed from the ACC-on state to the ACC-off state. As a result, it is estimated that this is a scene where the user gets off and visits the destination.

  If the vehicle is not in the ACC-on state from the ACC-off state, it is subsequently determined whether or not reroute has occurred a predetermined number of times (S110). Here, the reroute means that the recommended route generation unit 53 generates a recommended route different from the initially set recommended route due to a cause such as the vehicle deviating from the recommended route. If the reroute occurs more than a predetermined number of times, the route guidance is made based on the recommended route to the destination of the pass that has passed, even though it actually passes the destination and tries to move to the next destination. There is a possibility. Accordingly, the HMI 30 outputs a confirmation message asking whether or not to switch to route guidance to the next destination (S112). If the user confirms that he / she wants to switch to route guidance to the next destination (by voice input to the HMI 30 or touch operation), it is determined that the destination has been reached. Then, a signal to that effect is output to the recommended route generation unit 53 (S120).

  On the other hand, the current position of the host vehicle does not coincide with the coordinates of the destination, the vehicle is not in the ACC-on state from the ACC-off state, and the re-route occurs more than a predetermined number of times and the user confirmation is obtained. If this is not the case, it is not determined that the destination has been reached, and the determination process from S106 is executed again.

  As described above, when the destination is classified as (1) a destination that is difficult to determine that the destination has been reached, it is determined whether or not an event that can be estimated to have reached the destination has been detected. When it is estimated that the destination has been reached, it is determined that the destination has been reached, and the recommended route generator 53 is made to select the next destination. Therefore, it is possible to suppress the inconvenience that the route guidance to the destination is continued even though the user actually wants to move to the next destination after using the facility as the destination. .

  In addition, as a specific example when estimating that the destination has been reached, the estimation based on the ignition state and the occurrence of the reroute is exemplified, but not limited to this, any event that can be estimated to have reached the destination It is good also as what estimates having arrived at the destination when detecting.

<When the destination is classified as (2)>
When the destination is classified as a destination that is easily determined to have reached (2), first, as in the case of (3), the current position of the host vehicle specified by the current position specifying unit 52 is It is determined whether or not it coincides with the coordinates of the destination selected in (S116). However, even if a positive determination is obtained in the determination, it is not determined that the destination has been reached immediately, and it is further determined whether or not the vehicle has stopped for a predetermined time (S118), Only when it is determined that the current position of the host vehicle matches the coordinates of the destination and the vehicle has stopped for a predetermined time, it is determined that the vehicle has reached the destination, and a signal to that effect is sent to the recommended route. It outputs to the production | generation part 53 (S120). As for the stop of the vehicle, it may be determined that the vehicle is stopped when the output value of the vehicle speed sensor 40 is less than a predetermined value (or a value of zero).

  Thus, when the destination is classified as (2) a destination that is easily determined to have reached, a positive determination is made in the basic determination based on the comparison between the current position of the host vehicle and the coordinates of the destination. When an event that is estimated to reach the destination is detected, it is determined that the destination has been reached. Accordingly, it is possible to suppress the inconvenience that the route guidance to the destination is ended although the user is actually traveling around the destination without finding the destination.

  As in the case of (1), the event that is estimated to have reached the destination is not limited to stopping for a predetermined time, and it may be estimated that the destination has been reached by any event. However, it is appropriate to combine the determinations under the AND condition, instead of combining the determinations under the OR condition as in the case of (1).

  According to the vehicle-mounted navigation device 1 of the present embodiment, a different determination method is used according to geographical information such as a facility set as a destination, so that it is more accurately determined whether or not the destination has been reached. Can do. As a result, in reality, the route guidance to the destination may be continued even though the user wants to move to the next destination after using the facilities that are the destination, etc. It is possible to suppress the inconvenience that the route guidance to the destination ends even though the ground is not found and the vehicle is traveling in the vicinity thereof.

  The best mode for carrying out the present invention has been described above with reference to the embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the scope of the present invention. And substitutions can be added.

  The present invention can be used in the automobile manufacturing industry, the automobile parts manufacturing industry, and the like.

It is a figure which shows an example of the whole structure of the vehicle-mounted navigation apparatus. It is a figure which shows a mode that a destination is produced | generated by selecting a destination sequentially. It is a flowchart which shows the flow of a process at the time of determining whether it reached | attained the destination using the different determination method according to the destination classification | category.

Explanation of symbols

1 In-vehicle navigation device 10 GPS receiver 20 Memory 30 HMI
40 vehicle speed sensor 45 ignition switch 50 navigation computer 51 destination setting unit 52 current position specifying unit 53 recommended route generating unit 54 route guiding unit 55 arrival determining unit

Claims (1)

An in-vehicle navigation device capable of setting a plurality of destinations to be sequentially guided,
Position specifying means for specifying the position of the vehicle;
An arrival determining means for determining whether or not the vehicle has reached one destination among the plurality of destinations by comparing at least the position of the vehicle specified by the position specifying means with the coordinates of the destination;
The arrival determination means acquires geographical information related to the destination to be determined, and determines the destination to be determined regarding the ease with which it is determined that the destination has been reached based on the acquired geographical information. If it is classified that it is not easy to determine that it has reached the destination to be determined, in addition to the position of the vehicle specified by the position specifying means, the operation state of the vehicle and / or The determination is performed by reflecting whether or not the recommended route is reset by the in-vehicle navigation device .
Car navigation system.

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