JPH0894373A - Navigation device for vehicle - Google Patents

Abstract

PURPOSE: To enable a navigation device for vehicle to accurately discriminate that its own vehicle has passed through a pointed place by adding at least a prescribed value to the shortest distance when the distance found by means of a distance calculating means becomes the nearest to the pointed place. CONSTITUTION: A location section 22 detects the absolute location of its own vehicle based on the data supplied from a sensor section 10 and compares the absolute location with the map data supplied from a map data storing section 14. The section 22 is connected with a calculating section 24 and supplies the present location data to the section 24. The section 24 always calculates the distance Xn from the present location to a pointed place and discriminates whether the distance Xn is 1.0km. When, for example, the distance Xn is 1.0km, the section 24 discriminates that an IG (ignition switch) is 'OFF' and, when the 'OFF' state of the IG continues more than 30 minutes, discriminates that the vehicle has passed through the point.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides route guidance to a point point to be passed to a destination when the point point to be passed is input, and when the point point is passed, the next point is passed. The present invention relates to a vehicle navigation device that provides route guidance toward a point or a destination.

[0002]

2. Description of the Related Art Conventionally, a navigation device for displaying a current position on a map and assisting a driver in selecting a route has been known, and has been installed in many automobiles. This navigation device searches for a route to the destination by inputting the destination, displays the route on a map, and also displays a distance sensor, a direction sensor, and a GP.
The current position is detected using S (Global Positioning System), etc., and this is also displayed on the map for route guidance.

Further, the navigation device can input a point point to be passed to the destination to perform a route search. For example, it is convenient to enter the point point when going to a destination or visiting some tourist spots after visiting a department store. Further, even if it is a mere passing point, if the passing point is input as a point point, the route guidance will be directed to the point point, so that there is an advantage that the guidance becomes easy to understand.

However, in actual driving, in many cases, the point 0 m from the point does not always pass. For example, in many cases, it is not possible to drive from the point point to the point 0 m by car due to road conditions. Therefore, conventionally, when a vehicle enters an area within a predetermined radius from a point point, it is determined that the vehicle has passed the point point, and the guidance is switched to the next point point. This makes the judgment of passing point points flexible,
Passing judgment can be made relatively correct. Regarding the determination of such point points, for example, Japanese Patent Laid-Open No.
No. 62082 is disclosed.

[0005]

However, in traveling to the destination, there are cases where the stop at the point is stopped and the vehicle heads for the next point or the destination. In such a case, there are many cases where the vehicle does not enter the area determined to pass the above-mentioned point point, and there is a problem that the route guidance to the point point stopped at this time is continued.

Further, there are various points such as passage points on the road, department stores, restaurants and tourist spots, and it is considered that the determination of passing the point points is different depending on these types. Then, if the area for the point point passage determination described above is enlarged, the guide will be switched to the guide to the next point point even though the point point has not actually passed, and if the area is reduced, it will pass. The problem that the guidance to the point point is continued occurs.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a navigation device capable of accurately determining the passage of a point.

[0008]

According to the present invention, when a point point to be passed to a destination is input, route guidance is performed toward this point point, and when the point point is passed, A navigation device for vehicles that provides route guidance to point points or destinations of
Distance calculation means for calculating the distance between the current position and the point point, distance change calculation means for calculating the change in distance calculated by the distance calculation means, and distance calculated by the distance calculation means based on the detection result of this distance change detection means. And a passage determination unit that determines passage of the point point based on an increase in a closest distance when the point is closest to the point point by a predetermined value or more.

Further, in the next invention, the range determining means for determining whether or not the closest distance is within a predetermined range, and when the result of the determination by the range determining means is not within the predetermined range, And a timing changing unit that delays the timing of the passage determination in the passage determining unit.

Further, the following invention is a type determining means for determining the type of the point point, and a range changing means for changing the predetermined range determined to be within the range by the range determining means according to the type of the point point, It is characterized by including.

Further, in the next invention, an area entry determining means for determining entry into the area when the distance calculated by the distance computing means is equal to or less than a predetermined value, and a travel stop due to turning off the ignition key is detected. Further comprising a stop detection means for stopping, a stop time measuring means for measuring the duration of the stop due to turning off the ignition key, and a determining means for determining whether or not the time duration of the stop is equal to or more than a predetermined value. It is characterized in that when the vehicle is stopped within a predetermined range from a point for a predetermined time or longer, point passing is determined.

[0012]

As described above, according to the present invention, it is determined that the driver is about to move away from the point point when the point point is away from the point point by a predetermined value or more after approaching the point point. Therefore, based on this determination, the point point passage is determined. Therefore, the driver can determine the passage of the point point intentionally even when the vehicle passes the vicinity of the point point itself without going to the point point or when the vehicle is parked in a parking lot far from the point point. Therefore, it is possible to effectively prevent the improper continuation of the guidance to the passing point.

Further, in the following invention, when the distance when the vehicle is closest to the point point is not very short, the timing of determination of passing the point point is delayed. This is because in such a case, there is a high possibility that there is still an intention to move toward the point point, as compared with the case where the point point is sufficiently approached and then the user moves away from the point point. In this case, for example, by providing an opportunity to determine whether or not to approach the point point again, the determination of passing the point can be made more reliable, and the guidance to the point point will end carelessly. Can be prevented.

Further, in the following invention, the distance used for determining whether the point is sufficiently close is changed according to the type of the point. As a result, it is possible to make judgments depending on whether you are going to a relatively close place such as a station or when you are only going to a place that is a certain distance away from a tourist spot, etc. it can.

Further, according to the invention described below, the passage of the point point is determined by stopping the vehicle within a predetermined distance from the point point for a predetermined time. It is often the case that the point point and the parking lot are apart from each other, and in such a case, the passage of the point point can be accurately determined.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the overall configuration of the embodiment. In this way, the sensor unit 10 that detects the traveling state of the vehicle and the navigation ECU 1 that performs various processes
2, a map data storage unit 14 for storing map data in a CD-ROM, a display unit 16 for displaying the present location, a voice generation unit 18 for generating guidance voice, etc., and an input unit 20 for inputting various data. There is. Also, navigation EC
U12 controls the location unit 22 that detects the current location, the route search, the calculation unit 24 that determines the arrival at the point or the destination, the display of the guidance screen on the display unit 16, and the generation of the guidance voice in the voice generation unit. It comprises a guide unit 26 for controlling.

The sensor unit 10 is composed of a gyro, a vehicle speed sensor, a GPS, etc., detects the running state of the vehicle, and obtains data for specifying the position. Sensor unit 10
Is connected to the location unit 22 and supplies the detected data to the location unit 22. The location unit 22 detects the absolute position (latitude, longitude) of the vehicle based on the data supplied from the sensor unit 10. Also,
The location unit 22 also compares the detected vehicle position with the map data supplied from the map data storage unit 14 and also performs a map matching process for locating the vehicle position on the road.

A calculation unit 24 is connected to the location unit 22 and supplies present location data to the calculation unit 24. Also,
The calculation unit 24 performs various processes such as a route search to a destination via a point point according to an instruction from the input unit 20. Therefore, the map data in the map data storage unit 14 is also supplied to the calculation unit 24. The input unit 20
In addition to some buttons, is configured by using the display unit 16 as a touch panel. There are various methods for inputting the destination and the point point, such as inputting an address, inputting a telephone number, and inputting using an index for each type of industry, and the calculation unit 24 finally recognizes the position.

The guide unit 26 controls the display on the display unit 16 and the generation of voice in the voice generation unit 18 based on the map data from the map data storage unit 14, the route from the calculation unit 24 and the data about the current location. . That is, the current location is displayed as an arrow on the map around the current location, and the searched route is displayed in a specific color such as red. Further, when approaching an intersection that requires a right or left turn, the voice generation unit 18 generates a guidance voice such as "500m ahead *** It is an intersection left turn."

Next, the operation at the time of determining the passage of the point point in this apparatus will be described with reference to the flowchart of FIG.

First, the calculation unit 24 always finds the distance Xn from the current position to the point point. So this X
It is determined whether n is 1.0 km or less (S11). S1
If 1 is YES, IG (ignition switch)
Is determined to be off (S12). And YES in S12
If so, it is determined whether or not the IG off state has passed for 30 minutes or more (S13), and if it has passed, it is determined that the point has passed (S14). As a result, guidance to the next point (or destination) is started.

The fact that the IG is turned off in the vicinity of the point is considered that it is considered that the vehicle has been parked here and has been used up, and that the vehicle has passed the point. The above-mentioned numbers of 1.0 km and 30 minutes are examples and can be changed as appropriate. In particular, IG
The off time may be automatically changed depending on the type of point, convenience store, famous place, historic site, etc.

On the other hand, if NO in any of S11, S12 and S13, it is judged whether the difference between the re-approaching distance XM and Xn to the point is 0 or more.
The maximum value is set as the initial value of this XM. Therefore, in the first loop, S15 is always Y
Become an ES. If YES in S15, the distance to the point point at that time is set in XM, and the closest distance is updated (S16). Then, n is updated to take in the distance Xn to the point point at the next time point (S17), S
Return to 11. In this way, the closest distance XM is sequentially updated while approaching the point point.

Next, if NO in S15, the distance Xn from the current point is the closest distance X.
It is determined whether or not M is 1.5 times or more (S18). S18
If NO at S17, the process proceeds to S17, and the distance between the new current position and the point point is fetched. Then, the process returns to S11. On the other hand, if YES in S18, it is found that the distance is some distance from the closest approach distance XM. in this way,
It is highly probable that the driver intends to pass through this point if he / she moves away after approaching the point. Therefore, the closest distance XM
Is within 200 m (S19). And S1
If the answer is YES in 9, the vehicle once approaches the point point and then moves away, and it is highly possible that the driver intends to pass through this point point. Therefore, in this case, the point passing is determined (S1
4).

If NO in S19,
The vehicle is moving away from the point, but not so close to it. Therefore, there is a possibility that the driver still intends to go to the point point due to a wrong road around the point point. Therefore, in this case, it is determined whether or not this loop is continued while continuously traveling for 1 km (S20).
That is, in S15, it is determined whether the running is continued without updating the closest approach distance and in S18 without entering the range of 1.5 times the closest approach distance or less. Then, in the case of YES, it is determined that the point has been passed (S14).

As described above, according to this embodiment, if the IG is turned off for a predetermined time or more within a range of 1 km from the point point, it is determined that the point point has been reached. In addition, if the distance is more than a predetermined distance from the closest point to the point point and the closest distance is less than the predetermined value, it is determined that the driver is already heading to the next point point and it is determined that the point point has passed. To do. Furthermore, although it is more than a predetermined distance from the closest approach point,
If the closest distance is not less than or equal to the predetermined value, it is determined whether or not the state continues for the predetermined distance, and the determination that the point has passed is delayed. In this way, since the determination of passing the point point is changed according to the traveling situation, it is possible to make an appropriate determination in response to the driver's intentional stoppage of the point point.

Here, the distance of 200 m in S19 is considered to be different depending on the type of the point point. That is, the distance determined to have reached the point is different depending on the position of the parking lot or the like. Therefore, as shown in FIG. 3, this distance may be automatically set according to the type of point such as 200 m at a station, 1 km at an amusement park, a park, a famous place / historic site, etc. In addition, S18
The determination may be made when the distance is equal to or greater than a predetermined value, or the determination in S20 may be made when the running has continued for a predetermined time.

[0028]

As described above, according to the present invention,
If the driver is approaching the point point and then departs from the point point by a predetermined amount or more, it is determined that the driver is trying to move away from the point point. Therefore, based on this determination, the point point passage is determined. Therefore, the driver can determine the passage of the point point intentionally even when the vehicle passes the vicinity of the point point itself without going to the point point or when the vehicle is parked in a parking lot far from the point point. Therefore, it is possible to effectively prevent the improper continuation of the guidance to the passing point.

In the next invention, when the distance to the point point is closest to the point point, if the distance is not very short, the timing for determining the point point passage is delayed. This is because in such a case, there is a high possibility that there is still an intention to move toward the point point, as compared with the case where the point point is sufficiently approached and then the user moves away from the point point. In this case, for example, by providing an opportunity to determine whether or not to approach the point point again, the determination of passing the point can be made more reliable, and the guidance to the point point will end carelessly. Can be prevented.

Further, in the following invention, the distance used for determining whether the point is sufficiently close is changed according to the type of the point. As a result, it is possible to make judgments depending on whether you are going to a relatively close place such as a station or when you are only going to a place that is a certain distance away from a tourist spot, etc. it can.

Further, according to the next invention, the passage of the point point is judged by stopping the vehicle within a predetermined distance from the point point for a predetermined time. It is often the case that the point point and the parking lot are apart from each other, and in such a case, the passage of the point point can be accurately determined.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration of an embodiment.

FIG. 2 is a flowchart showing the operation of the embodiment.

FIG. 3 is an explanatory diagram showing sufficiently close distances for each destination.

[Explanation of symbols]

 10 sensor unit 12 navigation ECU 14 map data storage unit 16 display unit 18 voice generation unit 20 input unit 22 location unit 24 calculation unit 26 guide unit

Claims (4)

[Claims] 1. When a point point to be passed to the destination is input, route guidance is provided to this point point, and when the point point is passed, the route point is directed to the next point point or destination. A vehicle navigation device that performs route guidance by means of distance calculation means for calculating the distance between a current position and a point, distance change calculation means for calculating a change in the distance calculated by the distance calculation means, and this distance change detection A passage determination means for determining the passage of the point point based on the fact that the distance calculated by the distance calculation means has increased by a predetermined value or more with respect to the closest approach distance when the point is closest to the point point based on the detection result of the means; A vehicle navigation device, comprising: 2. The apparatus according to claim 1, wherein the range determination means for determining whether or not the closest distance is within a predetermined range, and the determination result of the range determination means are not within the predetermined range. The vehicle navigation device further comprises: timing changing means for delaying the timing of the passage determination in the passage determining means. 3. The apparatus according to claim 2, wherein the type determining means for determining the type of the point point and the range for changing the predetermined range determined to be within the range by the range determining means according to the type of the point point. A vehicle navigation device comprising: a changing unit. 4. The apparatus according to claim 1, wherein the distance is calculated by the distance calculating means to be less than or equal to a predetermined value, the in-area entry determining means is configured to determine entry into the area, and the ignition key is turned off. A stop detection means for detecting a travel stop, a stop time measuring means for measuring the duration of the stop due to the ignition key being turned off, and a determining means for determining whether or not the time duration of the stop is a predetermined value or more, A vehicle navigation device, comprising: a point navigation device, wherein when a vehicle is stopped within a predetermined range from a point point for a predetermined time or more, point passing is determined.