Showing papers on "Turn-by-turn navigation published in 1995"

Automobile navigation system with dynamic traffic data

Abstract: A system located in an automobile provides personalized traffic informationnd route planning capabilities. This system uses equipment which is becoming standard in automobiles, such as on-board navigation systems and cellular telephones. On-board navigation systems use global positioning system (GPS) satellites to position the automobile with respect to streets in a map database. As the automobile moves, the navigation system updates the location. A central database includes travel time information for each street segment and transition between street segments in the map database. Based upon the travel time information in the database, a route from a current location to a desired destination, or series of destinations, can be planned in order to have a minimum travel time. The route can be provided to the on-board navigation system, which then directs the driver in traveling the route. The cellular telephone in the automobile can be used for communicating with the central database to obtain travel times for route planning. In order to provide dynamic travel time information to the central database, each automobile in the system operates as a data collector. As various street segments are traversed, the travel time for each segment is recorded. The travel time and street segment information is periodically transferred to the central database through the cellular telephone connection. The central database then combines the travel time data from each automobile to create accurate travel time data for each street segment.

Navigation information system

Abstract: A navigation information system comprises a communications system having a fixed part (11 to 20) and at least one mobile part (1 to 10), the fixed part including a data storage and processing means (15) for identifying the location of a mobile unit, generating guidance information appropriate to that location and transmitting it to the mobile unit. By locating most of the complexity with the service provider, in particular the navigation computer (15) and geographical database (17), the system can be readily updated and the capital cost of the in-vehicle system, which in its simplest form may be a standard cellular telephone (1), can be minimised. The user makes a request for guidance information, and the system, having determined the user's present location, then transmits instructions to the user. The user's present location can be determined by means such as a Satellite Positioning System (7).

Mapless GPS navigation system in vehicle entertainment system

Abstract: A navigation system is provided for offering navigational assistance to a mobile user. The navigation system receives GPS position information signals which are processed to determine current position latitude and longitude coordinates and direction of travel. A destination database includes a plurality of categorized destinations and corresponding destination position coordinates pertaining to the destinations. The destination database is stored on an interfacable memory card and contains menu categories and subcategories for classifying the destinations and additional text information pertaining to the destinations. User selectable menu controls enable the user to sequence through the menu of categories and destinations and select a desired destination. This is easily accomplished by rotating a rotary pushbutton to view category and destination selections and depressing the rotary pushbutton to select the selection shown. A processor compares the current position coordinates with the position coordinates of the selected destination and determines a distance and a straight-line direction from the current position to the selected destination. A display displays the distance and a direction pointing indicator for showing the direction from the current position to the selected destination. In one embodiment, the navigation system is integrated with an audio entertainment system and shares a common display and housing.

Navigation system for an automotive vehicle

Abstract: A navigation system for an automotive vehicle designed to display a road map image around the vehicle in correlation with the current position of the automotive vehicle. The navigation system is adapted to determine a best navigation route to a selected destination on the basis on the approximated time necessary to travel such a navigation route in correspondence to its travel length and speed rate.

Directional steering and navigation indicator

Abstract: A navigation and guidance system which directs a user toward a desired destination. Position and steering information are integrated into a single display to allow the user to immediately determine whether the correct course is being traveled, and to inform the use of any directional changes which may be necessary to be directed toward the desired destination waypoint. The user's position and course are determined by a navigation system and indicated on the display as a directional pointing icon, such as a line or arrow. The destination is displayed as a point. The user's Point of Closest Approach (PCA) can then be calculated according to current position, course, and the position of the desired destination. As the use's course gets closer to the bearing of the destination waypoint the PCA indicator can correspondingly shift with the user's movements. By superimposing the PCA over the destination waypoint, the user may precisely steer his or her craft to the desired destination.

Vehicular navigation system

Abstract: A vehicular navigation system includes a central control unit which determines when a present position deviates from a searched route along which guidance is being provided from a starting point to a destination and determines whether or not the detected deviating present position is on a guidable road prior to re-searching the route and providing guidance based upon the re-searched route. A guidable road is a road upon which the navigation system contains sufficient map information and guide information for the navigation system to search a route and provide guidance. Additionally, system determines whether the vehicle has traveled a predetermined distance after re-search of the route prior to providing travel guidance based upon the re-searched route. Otherwise travel guidance continues to be provided based upon the previously searched route. A driver, after making a short deviation, may thus return to the previous route without travel guidance being interrupted by a re-searched route.

Method and apparatus for providing navigation guidance

Abstract: A method and apparatus (10) for providing navigation guidance via a land vehicle by providing a navigation route planner (24) having a road network database (12) for planning a navigation route along the road network, determining a current estimated position of the land vehicle, communicating maneuver instructions to a driver of the land vehicle at a predetermined maneuver distance base value before the land vehicle reaches a required maneuver along the planned navigation route, and detecting and quantifying current environmental travel conditions for assisting a navigation device in guiding the land vehicle along the planned navigation route.

On-board vehicle navigation apparatus

Abstract: An on-board vehicle navigation apparatus which gives road directions to a driver which accurately describe the road conditions beyond an intersection at which to turn, without causing any confusion even if the route is complicated. A route planning section 9 determines a route based on the current position of the vehicle which is obtained through a current position determination section 2 and a destination assigned by a destination assignment section 10. The guide intersections which form this route are stored in a guide intersection memory 11. A route guidance section 12 continually monitors the current position of the vehicle and announces navigational instructions through a speaker 13 when the vehicle approaches a guide intersection. The type of navigational instruction is changed depending on the distance between the next two guide intersections through which the vehicle will pass.

Personal navigation system

Abstract: A personal navigation system, particularly for use by the blind, combines signals from a satellite-based global positioning system, an electronic map (20), a route-planning algorithm (17) and a tactile display (29) associated with a speech synthesizer (26) (or a control handset associated with a speech synthesizer) to present the road features both around the position of the person using the system and the desired destination. A route to a desired destination can be indicated using a route-planning algorithm (17) and verbal navigation information regarding the current position of the user, the route and the destination can be output via a speech synthesizer (26).

Method for controlling navigation of an aircraft, and interactive flight instrument panel to implement said method

Abstract: A method for preparing and controlling navigation of an aircraft uses a processor equipped with memories, a screen and keys. It comprises the steps of preparing the route to be followed by an aircraft by loading into the memory data pertaining to a route, defining parameters characterizing the environment in which the navigation will take place, and displaying during navigation a couple of way points including the last point through which the aircraft has passed and the next way point, the segment joining these two points together, and information required to control navigation between these two points. The invention enables the pilot to prepare his navigation without taking measurement readings and performing calculations.

Method of providing route information and system for providing route information

Abstract: PROBLEM TO BE SOLVED: To provide a method of and a system for providing route information, which can display a definite route to a final travel destination from a position around the destination, that can be located by a vehicle side navigation device, at a low cost, and which can smoothly guide a route from the present position to the final travel destination, and can smoothly display a route. SOLUTION: A navigation control device 12 on a vehicle 10 transmits positional data concerning the present position and a destination to an information center 22 through a communication part 18. A data processing part 28 in the information center 22 computes proposal position around the destination computed by the navigation control device 12 in accordance with the positional data, and detailed proposal routes corresponding to the proposal position around the destination, are computed with the use of an internal data base 24 and an external data base 32. Thus computed data are transmitted back to the vehicle 10. The vehicle 10 selects a detailed proposal route among the detailed proposal routes, corresponding to the position around the destination computed by the navigation control device 12, and displays the same on a display unit 16 so as to exhibit the detailed route. COPYRIGHT: (C)1997,JPO

Navigating the future

Abstract: A United States Department of Defense system called NAVSTAR Global Positioning System (GPS) is revolutionizing navigation and positioning technologies. GPS is a satellite-based, radio-navigation system consisting of 24 satellites arranged in 6 orbital planes at an altitude of 20,000 km and a ground-based infrastructure that monitors and controls the satellites. Every transportation mode can benefit from GPS. On the nation's highways, GPS can provide navigation and guidance to vehicles and buses, automated voice for bus stop annunciation, and accident data collection. The rail industry can track hazardous cargo and monitor the location of entire trains on their track network to prevent collision. The most dramatic use of GPS will eventually be in guiding an aircraft from the time it takes off until the time it lands. Finally, many marine navigators use a complex system of buoys, navigational beacons, and landmarks, which can be pinpointed accurately using GPS. This article describes how GPS works, the services available and the errors associated with services, the needs and requirements of users, augmentation services, and future developments. The author reports that the advances being made today are nothing short of phenomenal.

Vehicle navigation apparatus using information

Abstract: A navigation apparatus stores road data which are formed by a network of road links (303) and traveling costs corresponding to the respective ones of the road links. When the navigation apparatus receives traffic information corresponding to a specific link (301) which is set for communication of traffic information, the stored traveling costs are updated on the basis of a conversion table (200). The traveling cost for a road link corresponding to a specific link which is closed for traffic is updated to " INFINITY ". A route between an origin and a destination is searched for through the updated traveling costs and the network of the road links (303).

GPS modeling for designing aerospace vehicle navigation systems

Abstract: The complexity of the design of a Global Positioning System (GPS) user segment, as well as the performance demanded of the components, depends on user requirements such as total navigation accuracy. Other factors, for instance the expected satellite/vehicle geometry or the accuracy of an accompanying inertial navigation system can also affect the user segment design. Models of GPS measurements are used to predict user segment performance at various levels. Design curves are developed which illustrate the relationship between user requirements, the user segment design, and component performance. >

A compact driver interface for navigation and route guidance

Abstract: This paper describes a compact driver interface (CDI) for an in-vehicle navigation and route guidance system. The CDI consists of a partially flexible display device, a voice output subsystem, and a driver input device. The display device, which may be mounted in the dashboard or the headliner, is spatially removed from the input device, which is mounted in or near the armrest. Despite its small size, the CDI can comfortably accommodate the features required for route guidance and is easy to operate.

Ease of user navigation through digital information spaces

Abstract: The question of user-centered design and evaluation of \"digital libraries\" is more complex than it appears on the surface. A natural tendency would be to assume that the only thing that has changed is that the content is in digital form and user access is global. However, there are a number of assumptions pertaining to non-digital libraries that are untenable in a random access storage environment and a global electronic network access environment. I would like to focus on the usability issue of \"navigability\" to address the user-based design and evaluation issues of digital libraries.

Drivers route selection: a philosophical consideration and user-interface

Abstract: Driving is a demanding task, which requires constant concentration and appropriate maneuvers of a vehicle on the road. The introduction of in-vehicle navigation and route guidance system should be carried out with utmost care because of the abundant information that can be provided to a driver. In order to increase the acceptance level and lower the negative safety impacts of in-vehicle navigation, the psychological consideration and study of a model of driver behaviour is crucial. The focus of this paper is on the human factor consideration in the design of a route selection function for an in-vehicle navigation system. The issue on route selection criterion, decision-making as well as user-interface is discussed. The objective is to develop a system function which can act as a driver's assistant and helps in the evaluation of alternate routes. Such a system can help to filter and interpret information to lessen the stress of drivers. In this paper, the philosophical consideration of drivers' route selection is discussed. Also, a review of route selection studies is presented. The concept of primary attributes is also introduced and the issue on the user-interface is discussed.

Car-mounting navigation system

Abstract: PURPOSE: To enable it to cope with even the size of a car, the experience and tastes of a driver, etc., by making the setting conditions of a function to search a guide route up to the destination in this car-mounting navigation system, into being more carefully, and properly throught out. CONSTITUTION: When a driver desires a route guidance and operates the specified key of a control part 3, a navigation controller 10 displays a menu to a display unit 4, making it select and set the items of types as large, medium and small cars, and an aptitude of whether a beginner or skilled driver, and the priority of a winding road or the like. Subsequently, when each place of departure and destination is inputted by a GPS receiver 2, a departure- destination setting part 18 or the like, such a road as being optimum and shortest distant conformed to this setting condition is searched by an optimum route searching part 20, whereby it is displayed on the display unit 4 together with a map image read out of a compact disk-ROM (read-only memory) 1. COPYRIGHT: (C)1996,JPO

Study of fast energy electron beam profile monitor system

Abstract: In the experimental study of accelerator physics, a turn by turn monitoring of the beam profile CAN provide very unique information. In this paper, we proposed a method which may measure a turn by turn electron beam profile through its synchrotron radiation by using a fast photo-diode. Here, we utilized the non-linearity of the response of the photo-diode detector. At high photon intensity, non-linearity occurred due to the saturation of the device. In this paper, we will present the theory and the test experimental results. We had examined this idea by using a modulated He-Ne laser to simulate the synchrotron radiation light. The results agree with our computer simulation results. But the photon power intensity of synchrotron radiation in the storage ring of TLS (Taiwan Light Source) is not sufficient to saturate the photo-diode as what we expected. In order to utilize the idea on the synchrotron radiation, we used an external light source to saturate the photo-diode and the synchrotron radiation be the probe beam. In this paper, the theory and the experiment of the above idea will be discussed.

Psychological assessment of car navigation system

Abstract: Now, Car Navigation System that is becoming widespread in Japan is not so usable. In this study three experiments examined how Car Navigation System support the human cognition or not. We investigated the reason of a person lost his way (experiment 1), whether Car Navigation System and voice guide function had a effect for supporting the human cognition (experiment 2), what was the reason of difficulty of operating Car Navigation System (experiment 3).In this study, we pointed out the reason that a person lost his way was that he had a wrong present position caused by failure of finding a landmark or a node, and he got out the situation by U-turn not by detour, Car Navigation System was quite effective for detecting to lose his way, the interface of Car Navigation System was opened for improvement.