JP2009222393A - Navigation apparatus for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigation apparatus more friendly to the environment. <P>SOLUTION: The navigation apparatus specifies a departing place and a destination according to user's operation (S100), calculates the distance between the departing place and the destination and determines whether the distance is not more than a predetermined threshold (S102), and urges the user to travel on foot when the distance between the departing place and the destination is not more than the predetermined threshold (S106). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicular navigation device that is mounted on a vehicle and performs travel guidance by searching for a guidance route from a departure place to a destination.

  Conventionally, in a vehicle navigation apparatus, when a route search for a guide route from a departure place to a destination is executed, the route search is executed on the assumption that the vehicle moves.

  Conventional vehicle navigation devices perform route guidance by performing route search on the assumption that the vehicle will move even if the distance between the departure point and the destination is short and it is preferable to move on foot. There is a problem that it is not good for the environment, for example, fuel is consumed or exhaust gas is generated when the vehicle moves.

  The present invention has been made in view of the above problems, and an object thereof is to provide a more environmentally friendly navigation device.

  In order to achieve the above object, the invention described in claim 1 is a vehicle navigation apparatus that is mounted on a vehicle and searches for a guide route from a departure place to a destination to provide travel guidance. Correspondingly, the destination specifying means for specifying the destination together with the starting place, the distance between the starting point and the destination specified by the destination specifying means are calculated, and it is determined whether or not the distance is equal to or less than a predetermined threshold. And a notifying unit for notifying the user to move on foot when the distance determining unit determines that the distance between the departure point and the destination is equal to or less than a predetermined threshold. It is characterized by that.

  According to such a configuration, when it is determined that the distance between the departure point and the destination is equal to or less than a predetermined threshold value, a notification that prompts the user to move on foot is performed, so navigation that is more environmentally friendly An apparatus can be provided.

  Further, the invention according to claim 2 collects information for specifying the situation around the vehicle, and based on the information for specifying the situation around the vehicle, whether or not the surrounding of the vehicle is an environment suitable for walking. If the environment determination unit determines that the environment around the vehicle is not suitable for walking, the distance determination unit determines that the distance between the departure point and the destination is equal to or less than a predetermined threshold value. Even in a case where it is determined that the notification is, the notification that prompts the user to move on foot is prohibited.

  Thus, when it is determined that the environment around the vehicle is not suitable for walking, the distance determination unit determines that the distance between the departure point and the destination is equal to or less than a predetermined threshold value. However, it is possible to prohibit notifications that encourage walking.

  FIG. 1 shows a configuration of a navigation device according to an embodiment of the present invention. The navigation device 1 includes a position detector 10, a map data input device 15, an operation unit 16, a solar radiation sensor 20, an outside air temperature sensor 21, a rainfall sensor 22, an external memory 23, a display device 24, a speaker 25, a transceiver 26, and a control. A portion 27 is provided.

  The position detector 10 has sensors such as a well-known geomagnetic sensor 11, a gyroscope 12, a distance sensor 13, and a GPS receiver 14, and information for specifying the current position and direction of the vehicle from these sensors. Is output to the control unit 27.

  The map data input device 15 is a device for inputting map data for map display and route search to the control unit 27. The map data input device 15 reads necessary map data from a non-volatile storage medium such as a CD, DVD, or hard disk drive in which the map data is stored in response to a request from the control unit 27.

  Map data includes the link length of each link, road type, number of lanes, traffic data indicating the position of traffic lights, so-called map matching data for improving position detection accuracy, rivers, lakes, seas, railways, facilities, etc. This includes background data representing the position, shape, name, facility data representing the name, location, and facility type of each facility.

  The operation unit 16 includes an operation switch group 17 including a push button switch provided around the display screen of the display device 24 and a touch switch provided in front of the display screen, and infrared rays based on a user operation. And the like, and a remote control sensor 19 for outputting a signal received from the operation remote control 18 to the control unit 27.

  The solar radiation sensor 20 detects the amount of solar radiation that enters the vehicle compartment, and outputs a signal corresponding to the amount of solar radiation to the control unit 27. The outside air temperature sensor 21 detects the outside air temperature and outputs a signal corresponding to the outside air temperature to the control unit 27. The rain sensor 22 detects the presence or absence of rain at the vehicle position, and outputs a signal indicating the presence or absence of rain to the control unit 27.

  The external memory 23 is a memory provided separately from a RAM and a ROM provided in the control unit 27 described later, and is configured by a non-volatile storage medium such as a flash memory.

  The display device 24 has a display screen such as a liquid crystal, and displays a video corresponding to a video signal input from the control unit 27 on the display screen. The speaker 25 outputs a sound corresponding to the sound signal input from the control unit 27.

  The transceiver 26 is a wireless receiver that receives VICS data wirelessly transmitted from the VICS center 3 via a VICS transmitter such as a roadside device installed along the road and outputs the VICS data to the control unit 27. The VICS data includes traffic jam information and traffic regulation information.

  The control unit 27 is configured as a computer including a CPU, a RAM, a ROM, an I / O, and the like, and the CPU performs various processes according to a program stored in the ROM.

  As processing of the control unit 27, current position specifying processing for specifying the current position and direction of the vehicle based on information for specifying the current position and direction of the vehicle input from the position detector 10, Map display processing for acquiring map data from the map data input device 15 and displaying the vehicle position mark on a map around the vehicle position, and destination specification processing for specifying the destination according to the operation of the operation unit 16 by the user There are a process for implementing a route search function for searching for a guide route from a departure place to a destination using the Dijkstra method, a process for implementing a route guidance function for performing route guidance according to the guide route, and the like.

  The control unit 27 in this embodiment determines whether or not the distance between the current position of the vehicle and the destination is equal to or less than a predetermined threshold, and the distance between the current position of the vehicle and the destination is predetermined. If it determines with it being below a threshold value, the process which alert | reports prompting a user to move on foot will be implemented.

  FIG. 2 shows a flowchart of this process. The navigation device 1 is in an operating state when an ignition switch of the vehicle is turned on. Then, when an operation for specifying the destination is performed by the user's operation, the control unit 27 performs the process shown in FIG.

First, a starting point and a destination are specified (S100). Specifically, the departure point and the destination are specified according to the operation of the operation unit 16 by the user. The destination may be specified, for example, by specifying a touch-operated position on a map displayed on the display as a destination, or specifying a facility searched by performing a destination search as a destination. .
Note that the current position of the vehicle is specified as the departure place, particularly when the departure place is not designated by the user.

  Next, it is determined whether or not the destination is a suburb (S102). Specifically, it searches for a guidance route from the departure point to the destination, calculates a distance along the guidance route from the departure point to the destination (guide route length), and the distance is determined by a predetermined threshold ( For example, it is determined whether it is 2 km or less.

  Here, if the distance from the departure point to the destination is equal to or less than a predetermined threshold value, the determination in S102 is YES, and then it is determined whether the environmental condition is OK (S104). Specifically, as information for specifying the situation around the vehicle, a signal input from the solar radiation sensor 20, a signal input from the outside air temperature sensor 21, and a signal input from the rainfall sensor 22 are acquired, and these Based on the signal, it is determined whether or not the environment around the vehicle is not suitable for walking.

  In this embodiment, when it is determined that it is a time zone with solar radiation based on a signal input from the solar radiation sensor 20, the first outside temperature is predetermined based on the signal input from the external air temperature sensor 21. When it is determined that the temperature is equal to or higher than the reference temperature (for example, 35 degrees), the outside air temperature is less than a second reference temperature (for example, 5 degrees) that is determined in advance based on a signal input from the outside air temperature sensor 21. If the determination is made, it is determined that the environment around the vehicle is not suitable for walking if it falls under any of the cases where it is determined that there is rainfall at the vehicle position based on the signal input from the rain sensor 22. That is, during the period from sunset to sunrise, if the outside air temperature is higher than the first reference temperature (for example, 35 degrees), if the outside air temperature is less than the second reference temperature (for example, 5 degrees), it will rain at the vehicle position. When there is, there is determined that the environment around the vehicle is not suitable for walking.

  Here, when it is determined that the environment around the vehicle is suitable for walking, next, a notification that prompts the user to move on foot is performed (S105). Specifically, a message prompting movement on foot such as “How about walking?” Is displayed on the display screen of the display device 24, and voice is output from the speaker 25.

  If it is determined that the environment around the vehicle is not suitable for walking, the process returns to S100 without performing notification for prompting movement on foot. That is, in this case, notification that prompts the user to move on foot is prohibited.

  If the distance from the departure point to the destination is longer than a predetermined threshold, the determination in S102 is NO and travel guidance is performed according to the guidance route (S108). For example, when the vehicle is positioned in front of the guidance intersection, guidance such as “turn right at the next signal” is performed.

  According to the above configuration, when it is determined that the distance between the departure point and the destination is equal to or less than a predetermined threshold value, a notification that prompts the user to move on foot is performed, and thus a more environmentally friendly navigation device Can be provided.

  Further, if it is determined that the environment around the vehicle is not suitable for walking, even if the distance determination means determines that the distance between the departure point and the destination is equal to or less than a predetermined threshold, It is possible to prohibit notifications that encourage walking.

  In addition, this invention is not limited to the said embodiment, Based on the meaning of this invention, it can implement with a various form.

  For example, in the above embodiment, in S102, a guidance route from the departure place to the destination is searched, and the distance from the departure place to the destination is calculated, and it is determined whether the distance is equal to or less than a predetermined threshold. However, for example, a linear distance between the departure point and the destination may be calculated, and it may be determined whether the linear distance is equal to or less than a predetermined threshold.

  Moreover, in the said embodiment, the signal input from the solar radiation sensor 20, the signal input from the external temperature sensor 21, and the signal input from the rainfall sensor 22 are acquired as information for specifying the condition around the vehicle, Based on these signals, it is determined whether or not the surroundings of the vehicle are suitable for walking, but various information other than the above signals are acquired to determine whether or not the surroundings of the vehicle are not suitable for walking. Also good.

  Moreover, in the said embodiment, although the message prompting the movement on foot was displayed on the display screen of the display apparatus 24, it is not limited to the display screen of the display apparatus 24, For example, head-up display etc. You may make it display on this display apparatus.

  Further, in the above embodiment, the message for prompting the user to move on foot is displayed on the display screen of the display device 24 and is output from the speaker 25. However, either the display on the display device 24 or the audio output from the speaker 25 is output. It is good also as only one side.

  The correspondence relationship between the configuration in the above embodiment and the configuration of the claims will be described. S100 corresponds to a destination specifying unit, S102 corresponds to a distance determination unit, S106 corresponds to a notification unit, and S104. Corresponds to the environment determination means.

It is a figure which shows the structure of the navigation apparatus which concerns on one Embodiment of this invention. It is a flowchart which shows the process of a control part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Navigation apparatus 10 Position detector 11 Geomagnetic sensor 12 Gyroscope 13 Distance sensor 14 GPS receiver 15 Map data input device 16 Operation part 17 Operation switch group 18 Operation remote control 19 Remote control sensor 20 Solar radiation sensor 21 Outside temperature sensor 22 Rainfall sensor 23 External Memory 24 Display device 25 Speaker 26 Transceiver 27 Control unit

Claims (2)

A vehicular navigation device that is mounted on a vehicle and searches for a guidance route from a departure point to a destination to provide travel guidance,
Destination specifying means for specifying the destination together with the starting point according to a user operation;
A distance determination means for calculating a distance between the departure place specified by the destination specification means and the destination, and determining whether the distance is equal to or less than a predetermined threshold;
Informing means for informing the user to move on foot when the distance judging means determines that the distance between the starting point and the destination is not more than a predetermined threshold. A vehicle navigation device. Environment determining means for collecting information for specifying the situation around the vehicle and determining whether or not the surrounding of the vehicle is an environment suitable for walking based on information for specifying the situation around the vehicle ,
When it is determined by the environment determination means that the environment around the vehicle is not suitable for walking, the distance determination means determines that the distance between the departure place and the destination is equal to or less than a predetermined threshold. 2. The vehicle navigation device according to claim 1, wherein, even in a case where the notification is made, the notification that prompts the user to move on foot is prohibited.

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