JPH0914981A - On-vehicle navigator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-accuracy navigation by preventing the occurrence of erroneous rearrangement by providing a plurality of reference levels for rearrangement and selecting one reference level in accordance with the reliability judged by a detecting means. SOLUTION: A setting means 5 sets a reference level so that detected data can be rearranged in the passable range of map data when the detected data get out of the passable range. Namely, a plurality of reference levels, such as a level '3' (=high), level '2' (=intermediate), and level '1' (=off), is provided for rearrangement in accordance with the distance from a detecting location and the occurrence of erroneous rearrangement is prevented by switching the level to level '3' on a straight road or highway or to level '1' on a complicated road. When, for example, road information is stored in a storing means 3 as attribute information, the level switching can be automated. In addition, when the detecting means 1 detects a remarkable drop of location detecting reliability, the means 1 rearranges the detected data on a road anyhow by raising the reference level. Therefore, the reliability of navigation can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle navigator device suitable for use, for example, when mounted on a vehicle to detect and display the position of the vehicle.

[0002]

2. Description of the Related Art In a so-called in-vehicle navigation device, for example, a device for detecting an absolute position by receiving a radio signal from an artificial satellite or the like, or a reference point is determined and the traveling direction and moving distance of a vehicle thereafter are integrated. Vehicle position detecting means for detecting the relative position of the vehicle, and the vehicle position detected by the vehicle position detecting means is displayed on a display device.

However, the vehicle position detecting means as described above does not always detect with sufficient accuracy in any of the methods. Therefore, it is proposed to arrange the conventionally detected vehicle position on the map stored in the storage means and to rearrange (map matching) the position within the possible range when the position deviates from the range in which the vehicle can travel. No. 58-129313).

[0004]

However, when the above rearrangement is performed, if the rearrangement is always performed, for example, when the vehicle enters a parking lot or the like which is not set as a driving range on a map, etc. However, this vehicle position may be forcibly rearranged on the nearest road or the like, and this may cause a subsequent traveling route or the like to be significantly shifted.

[0005] In addition, even when the vehicle is traveling on a special road such as an expressway, if the rearrangement is performed at a uniform reference level, the vehicle is relocated to a general road which cannot be directly entered from the road due to a detection error or the like. In some cases, the driving route and the like thereafter may be significantly shifted.

The present invention has been made in view of such a point, and the problem to be solved is that, since the rearrangement has always been always performed at a fixed reference level, the occurrence of a detection error or the like has occurred. Therefore, erroneous rearrangement may be performed, which may cause a subsequent traveling route or the like to be significantly shifted.

[0007]

Therefore, in the present invention, a plurality of levels are provided as the relocation reference, and the reliability of the detection means is determined to determine the relocation reference according to the determined reliability. This is to set the level, which allows you to always perform relocations as needed, thereby preventing incorrect relocations and performing more precise navigation. You can

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION That is, the present invention has means for detecting the position of a vehicle on which the vehicle is mounted based on information, and storage means for accommodating the data of a map on which the vehicle can run, which is detected by the detecting means. When rearranging the determined vehicle position on the map of the storage means, a plurality of levels are provided as a reference for rearrangement, the reliability of the detection means is determined, and the level is set according to the determined reliability. It is provided with a means for doing so.

The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the structure of an example of a vehicle-mounted navigator to which the present invention is applied. In this FIG.
For example, a detecting means 1 for detecting the position of the mounted vehicle based on a radio signal from an artificial satellite or information such as a traveling direction and a moving distance of the vehicle is provided, and detection data from the detecting means 1 is supplied to the CPU 2. .

[0010] Further, a storage means 3 in which data of, for example, a road map on which the vehicle can travel is provided, and data from the storage means 3 is supplied to the CPU 2. In the CPU 2, the detection data from the detection means 1 is arranged on the map data from the storage means 3, and a display signal provided with an arbitrary mark or the like at the position of the detection data is supplied to the display device 4. Is done.

As a result, the display of the current location of the vehicle is displayed on the display device 4 on a predetermined road map.
Further, when the detected data deviates from the travelable range of the map data, a process of rearranging the detected data within the possible range is performed, and a means 5 for setting a reference level of the rearrangement is provided. Rearrangement is performed according to the level set by the setting means 5.

In other words, with respect to the above-described problem of the parking lot, etc., for example, a level 1 at which relocation is performed and a level 0 at which relocation is not performed are provided as reference levels for relocation.
When the user determines that the vehicle has entered the parking lot or the like, the user can switch to level 0 by the setting means 5, thereby preventing erroneous rearrangement from being performed by forced rearrangement thereafter. it can.

Further, this level switching can be automatically performed by judging from, for example, the speed and the trajectory of the vehicle. That is, when a vehicle is put in a parking lot or the like, a unique change pattern is drawn on, for example, the speed and trajectory of the vehicle. Thus, by determining this pattern, it is possible to determine, for example, the entry of the vehicle into a parking lot or the like, and thereby automatically switch the reference level for rearrangement.

The reference level for performing rearrangement includes a plurality of levels (for example, 3 = 3
By setting large (2 = medium, 1 = small, 0 = off), for example, switching to level 3 in a place such as a single road, and switching to level 1 in a complicated road may cause erroneous relocation. Prevention and more accurate navigation can be performed.

The switching of the reference level of the rearrangement is performed, for example, by giving the information of the above-mentioned one-way road and the complicated road as attribute information in the data of the map stored in the storage means 3. Can be performed automatically according to the conditions. That is, this information can be obtained according to, for example, the number of surrounding roads at an arbitrary position on the map in the storage means 3.

Therefore, when the vehicle position detected by the detection means 1 is arranged on the map in the storage means 3, the attribute information of the road is determined, and the switching of the relocation reference level is automatically performed according to the information. Can be done. For example, in a place such as a single road, the level is switched to level 3 and relocation is performed even at a large distance.
To prevent the rearrangement from being performed at a large distance.

Further, if the map data is a multi-layer database (A is a highway or more, B is a main trunk, C is all the driving range) as shown in FIG. The level may be switched according to. That is, for example, by performing the rearrangement using the maps of FIGS. 2A to 2C according to the types of roads that have been arranged so far, it is possible to prevent the possibility of being rearranged on the wrong road.

In this case, for example, a plurality of levels corresponding to the distance from the above-described detection position are used as reference levels for performing the above-described rearrangement. For example, when the map A is adopted, level 3 = large; Level 2 = medium when map B is adopted, level 1 when map C is adopted
= By switching to small, good rearrangement is always performed, and more accurate navigation can be performed.

When the vehicle position detecting means 1 detects and detects a radio signal from an artificial satellite, for example, if the radio signal is blocked by a building in an urban area, for example, The reliability of position detection is reduced. Such a decrease in reliability can be determined by the detection means 1.

In the determination of the reliability by the detection means 1, for example, when it is determined that the reliability of the position detection by the detection means 1 is significantly reduced, for example, the reference level for performing the above-described rearrangement is set. It can also be raised, so that it can be relocated on the road anyway to improve the reliability of the navigation.

Therefore, in this apparatus, by providing a plurality of levels for the rearrangement reference, determining the reliability of the detecting means, and setting the reference level of the rearrangement according to the determined reliability, It is possible to perform rearrangement as needed, thereby preventing occurrence of erroneous rearrangement and performing more accurate navigation.

As a result, since the rearrangement is conventionally always performed at a constant reference level, there is a possibility that erroneous rearrangement may be performed due to the occurrence of a detection error or the like, and the subsequent traveling route and the like will be greatly shifted. According to the present invention, there is a possibility that incorrect rearrangement can be prevented, and more accurate navigation can be performed.

Further, in the above-described apparatus, for example, a level 1 at which relocation is performed and a level 0 at which relocation is not performed are provided as reference levels for relocation. By switching to level 0 by the means 5, it is possible to prevent erroneous relocation from being performed due to forced relocation.

Further, by providing a plurality of levels (for example, 3 = large, 2 = medium, 1 = small, 0 = off) as a reference level for performing rearrangement, for example, in a place such as a single road, level 3 is provided. By switching to level 1 on a road that has been switched or congested, erroneous rearrangement can be prevented, and more accurate navigation can be performed.

If the map data is a multi-layer database (A is a highway or higher, B is a main trunk, C is the entire driving range), the level is switched according to the layer, For example, by performing rearrangement according to the type of road that has been arranged up to that time, it is possible to prevent the possibility of being rearranged on the wrong road.

Further, when the reliability of the position detection by the detecting means is significantly reduced, for example, the reference level for performing the above-mentioned relocation is increased, and the relocation is performed on the road anyway, so that the reliability of the navigation is improved. It can also improve the performance.

Thus, according to the above-described vehicle-mounted navigator device, the vehicle-mounted navigator device has means for detecting the position of the vehicle on which the vehicle is mounted based on information, and storage means for storing the data of the map on which the vehicle can run, and the detecting means. When rearranging the vehicle position detected by the method on the map of the storage means, a plurality of levels are provided as a reference for rearrangement, and the reliability of the detection means is determined to determine the level according to the determined reliability. By providing a means for setting, it is possible to always perform rearrangement as needed, thereby preventing occurrence of erroneous rearrangement and performing more accurate navigation.

[0028]

According to the present invention, a plurality of levels are provided as a reference for rearrangement, the reliability of the detecting means is determined, and the reference level for rearrangement is set according to the determined reliability. As a result, the rearrangement can be always performed as needed, thereby preventing the occurrence of the incorrect rearrangement and performing the navigation with higher accuracy.

As a result, since the rearrangement is conventionally always performed at a constant reference level, erroneous rearrangement may be performed due to the occurrence of a detection error or the like, and the subsequent traveling route and the like will be largely shifted. According to the present invention, there is a possibility that incorrect rearrangement can be prevented, and more accurate navigation can be performed.

Further, according to the present invention, when the reliability of the position detection by the detecting means is remarkably lowered, for example, the reference level for performing the above-mentioned rearrangement is increased so that the rearrangement is performed on the road anyway. In addition, the reliability of navigation can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an example of a vehicle-mounted navigator device to which the present invention is applied.

FIG. 2 is a diagram for explaining an example of a vehicle-mounted navigator device to which the present invention is applied.

[Explanation of symbols]

1 position detecting means, 2 CPU, 3 storage means, 4 display device, 5 level setting means

Claims (1)

[Claims] 1. A vehicle position having means for detecting the position of a vehicle on which the vehicle is mounted based on information, and storage means for storing data of a map on which the vehicle can travel, the vehicle position detected by the detecting means. When relocating on the map of the storage means, a plurality of levels are provided as a reference for the relocation, and the reliability of the detection means is determined and the level is set according to the determined reliability. An in-vehicle navigator device characterized by comprising means for performing.