Showing papers on "Turn-by-turn navigation published in 1994"

Methods and apparatus for updating navigation information in a motorized vehicle

Abstract: Method and apparatus providing supplementary navigation data to be used w a vehicular navigation system. The supplementary navigation data can be superimposed over primary navigation data on a navigation system display or can be presented as a split-screen display. The supplementary navigation data may contain information such as locations of local facilities, local road information, types of local facilities. The supplementary navigation data is received by the vehicle when the vehicle is coupled to a station, such as a battery recharging or a refueling station, and is transmitted to the navigation system. An on-board controller can store the data and/or display the data. The navigation system could use the supplementary data to determine routes or locations for specific local facilities selected by the user. In an interactive or two-way communications system, the user can select predetermined types of supplementary data to be received. The supplementary navigation data is preferably transmitted to the navigation system at a local vehicle station, such as a refueling station, a vehicle rest stop, a vehicle tourist center, etc. Position update information can also be entered for resetting or recalibrating an internally maintained vehicle position.

Graphical user interface for navigating between levels displaying hallway and room metaphors

Abstract: A graphical navigation user interface for enabling user control of a computer system incorporating navigation levels, each of which is based on a physical real-world metaphor. The navigation system includes a first navigation level, a second navigation level and a third navigation level. The first navigation level includes a plurality of first level objects having a respective plurality of functions. When the first navigation level is accessed, a first level object is displayed. The presentation of the first level object is based on the appearance of a corresponding real-world device. From the first level, the second level is accessed by actuating a step back control. The second navigation level includes a second level object which represents a room or a similar architectural structure. This second level object includes a plurality of objects representing first navigation level objects. From the second level room object, navigation to a first level is performed by actuating one of the first level objects. From the second navigation level, the third navigation level is accessed by actuating a step back control. The third navigation level includes a third level object which depicts a hallway or similar commonly understood continuous structure for linearly moving between locations. From the third navigation level, the second navigation level is accessed by touching an object representing the second level. The third level object can be extended lengthwise to provide navigation space for new second level and first level objects.

AMOR-an autonomous mobile robot navigation system

Abstract: In this paper an autonomous mobile robot navigation system, capable of performing automated office delivery tasks, is described. The implemented prototype system is capable of autonomously navigating from one room to another designated by the operator. This involves: 1) navigation in a room, where the robot dynamically detects and avoid obstacles; 2) hall navigation, where it follows the walls by a reactive scheme; and 3) door traversing, where the robot autonomously positions the door and passes safely through it. The only a priori knowledge used by the system consists of a graph representation of the navigation environment, containing door positions. A priori, no knowledge is provided about the position, physical or geometrical properties of other objects in the environment. >

Analysis of the use of digital road maps in vehicle navigation

Abstract: Digital road maps are being used increasingly throughout the world as they become more available. Five major digital road map suppliers are focusing their efforts on producing databases that support vehicle navigation functions. Of a total of 147 vehicle navigation systems in the world, 89 use in-vehicle maps, of which, 35 employ map matching, and 31 offer real-time route guidance. Vehicle navigation systems are limited by the maps they use, so the availability of inexpensive, complete and seamless navigable digital road maps remains as an impediment to the wider use of vehicle navigation systems. >

Learning mobile robot navigation: a behavior-based approach

Abstract: We describe a mobile robot navigation behavior based on learning from the visual environment of a particular task This approach enables repetitions of such a previously learned navigation task Navigation is performed from stored iconic visual information as well as stored motor-information from a reference or learning-run This representation is then used to large-scale guide the robot on subsequent independent runs A system of competing behaviors takes care of near to medium distance navigation problems such as obstacle detection and avoidance, finding independently moving objects and determine potential "danger" A special feature of this system is the use of retinal images The large-scale navigation behavior is based on a "vergence-like" mechanism that determines the direction of the disparity between the current visual structure and the stored model This method is very simple and computationally fast Motor information is used for comparison to give gross position estimation >

Application of head-up displays for in-vehicle navigation/route guidance

Abstract: The paper first discusses using HUDs for in-vehicle navigation/route guidance systems based on the results of preliminary experiments. It then discusses how and what kinds of information should be displayed by HUDs to assure ease of recognition by the driver. Finally, based on these considerations, a HUD system is proposed as a visual interface for future in-vehicle navigation/route guidance systems. >

Navigation and guidance displays: impact on driver performance

Abstract: Navigation and guidance systems should assist drivers by making navigation easier. However, the visual demands of the displays, and the potential for distraction could reduce safety. This paper reviews studies of the effect of these systems on visual demand, vehicle control and navigation performance. Future research needs are outlined. (A) For the covering abstract see IRRD 868006.

Indoor robot navigation with a generic map

Abstract: We have investigated indoor robot navigation in situations where only a generic map is available Although some outdoor navigation methods can be used in indoor navigation, most methods for outdoor navigation are not generally applicable to indoor navigation because indoor navigation requires more precise and complete results Indoor navigation may be performed with a specific map The specific map, however, has several limitations Making a specific map is difficult and tedious In addition, it needs to be updated constantly because objects and their arrangement in an indoor setting are constantly changing To overcome these difficulties, navigation with a generic map is proposed The generic map includes general information about the environment Such a generic map allows the robot to navigate in environments without knowledge of the specific instances or their locations We have implemented a vision based robot, Antigone, on a Denning mobile robot The robot has navigated indoor environments with only a generic map when a goal is given symbolically Several methods for the robot have been developed concerning robustness and efficiency, which are some of the most important issues in robot navigation (1) We have developed the Junction-supported trinocular matching method that adds robustness to a trinocular matching method (2) We have introduced the s-map for environmental representation The s-map can be efficiently constructed from 3-D segments Moreover, it represents the environment more accurately in a 2-D domain consisting of width and depth, which transforms many 3-D problems in navigation into 2-D problems (3) We have proposed an efficient generic recognition system for landmark recognition, which works in real indoor environments (4) We have suggested the GPS-like path planning for vision based navigation, which is an efficient path planning algorithm

An alternative approach to automobile navigation

Abstract: This paper describes an alternative approach to automobile navigation focused on the delivery of product value within existing infrastructure and technology envelopes. This approach is low-cost, uses no in-vehicle maps, and has lower requirement on positioning accuracy compared to those using maps. The proposed system provides dynamic headings and distance information to guide the driver to a selected destination. The destination is entered primarily by accessing a digital destination directory stored on a memory card. The system calculates vehicle positions using a Global Positioning System (GPS) receiver with in-vehicle sensors as a backup system to the GPS.

An adaptive user navigation mechanism and its evaluation

Abstract: Recently, there have been many online help systems that provide usage explanations for applications. However, it is difficult to find out necessary information in help contents and to understand how to obtain complete information. A navigation mechanism which can provide a user with essential information and guide the user so that he can achieve intended actions is indispensable. In this paper, we propose an adaptive navigation system which prevents the display of navigation information on decisions that a user has already made by reflecting the current state of an application. In this research, in order to describe the structure of an application, Petri nets which are suitable for modeling event-driven systems are used. The application system is constructed based on these Petri nets. By communicating between the application system and its navigation system through these Petri nets, a user navigation system reflecting the execution state of the application can be realized. >

The art of in-vehicle navigation

Abstract: This article gives an overview of in-vehicle navigation systems as they are being introduced into the U.S. market. These products, for the most part, combine Global Positioning System (GPS) technology for navigation, digital moving maps for tracking, and a yellow pages directory of travel information. Focus is on the EtakGuide navigation unit.

Mobile Robot Navigation Using Brief Route Information

Abstract: This paper proposes a navigation system for a mobile robot moving in an outdoor environment with brief route information. Our approach to visual navigation is based on the ability to find and track road boundaries in the environment. The brief route information for navigating the robot is represented with motion directions (e.g. right, left) at the intersections and metric distances between the intersections. The system consists mainly of two modules. One is to move along a road autonomously. The other is to monitor the robot actions and to navigate it so that the robot does not deviate from the route indicated by the route information. Generally speaking, it is difficult to navigate the robot in an outdoor environment since the ground is not flat and the images taken through the camera contain some noises. We have evaluated its navigational capability with experimentations in the real environment. As a result, it is confirmed that the system can robustly navigate the robot over a long path.

Development of INFONAVI-an in-vehicle navigation system with an information function utilizing radio pager

Abstract: Daihatsu Motor is developing information and navigation systems aimed at small vehicles. The design goal of our system is to provide real time local information, good user interface and low cost. In this paper we present INFONAVI, an information dedicated navigation system with a one-way radio communication. The concept and system architecture are discussed. A data conversion algorithm introduced to utilize the paging networks as communication medium is explained. Finally, the configuration and functions of the sub-systems of INFONAVI are described. >