Showing papers on "Turn-by-turn navigation published in 1992"

Navigation apparatus for vehicles

Abstract: A navigation apparatus for vehicles according to the present invention has a display device for displaying road information. The navigation system is designed to selectively display the road information which is close to the current position of the vehicle and/or the demands of the driver from a large amount of road information (each of which consists of image data to be displayed and logical data on which logical determination can be made).

Navigation device and vehicle comprising the device

Abstract: A navigation device which is operative to navigate a user along a selected route, utilizing displays of relevant map sections and the selected route. The relevant map section is updated by a control unit in accordance with changes in user's present position. The control unit includes a picture processor which controls the display unit to show in a distinctive manner within a relevant map section the route segment already travelled and the segment yet to be travelled. The resulting display can therefore be very quickly interpreted by the user.

On-vehicle navigation apparatus with automatic re-initialization function

Abstract: An on-vehicle navigation apparatus in which destination coordinate data stored in a memory is erased when the distance from the present location to a destination is equal to or smaller than a predetermined value at the time the engine of a vehicle is started. The destination coordinate data will not therefore be erased while the vehicle is actually running toward the destination. The arrangement prevents display of navigation information such as the direction and distance from being stopped before the vehicle arrives at the destination.

PAN-DRIVE: A Vehicle Navigation And Route Guidance System

Abstract: PAN-DRIVE is a vehicle navigation and route guidance system Vehicle position estimation is autonomous and based on deadreckoning and map-matching techniques A routing algorithm generates an itinerary between two map locations by emulating the map topology with a graph and then using advanced techniques to generate the itinerary on the graph A vehicle guidance algorithm provides the driver with all the necessary audio and visual instructions to follow the route suggested by the routing algorithm The paper focuses on a general presentation of the PAN-DRIVE system with specific emphasis on critical design decisions, related to the basic system functionalities: navigation, routing and route guidance PAN-DRIVE is a vehicle navigation and route guidance system based on dead reckoning and map matching techniques The system incorporates both standard and advanced features The basic features include the necessary operations, such as navigation and routing, that guide the driver to any indicated destination using audio and visual insauctions and taking into consideration possible constraints and diverse conditions that may exist These operations are handled by on-board, microprocessor based, units that combine readings from the vehicle sensors and compare the estimated positions with a digital map External aid has been incorporated by the use of fixed locaticri beacons :hat serve primarily for system initialization Advanced features include infonnation and guidance to the closest service or emergency location, such as hospitals, pharmacies, police stations, petrol stations and others, as well as tourist and entertainment information 2 THE COMPONENTS OF THE SYSTEM The PAN-DRIVE system is a real time embedded system The heart of the hardware is based on an Intel 80286 microprocessor running at l6MHz The hardware component also includes four sensors, a radio receiver, a speech unit and a user terminal The software component includes several algorithms, namely, position estimation, routing and guidance, a database management system, a user interface and communication protocols A pictorial block diagram of PAN-DRIVE is shown in Figure 1

A blackboard architecture for perception planning in autonomous vehicles

Abstract: A blackboard architecture, used for the planning of perception actions to be executed by the local navigation system of an autonomous vehicle, is presented. Perception is not used to make a model of the world but rather is used as an aid to the navigation, to get localization clues from the environment and to detect obstacles or the approaching of dangerous terrain, through the detection of alarm beacons. Perception is also used to prepare and serve reflexive navigation and to execute some focusing of attention tasks for image acquisition in specified locations, related to surveillance tasks. A continuous and reactive planning approach, compatible with good real-time performance, is used to implement different navigation and perception strategies and to achieve an adaptive behavior which allows safe navigation in various unpredictable environment conditions. Perception planning is conceptually implemented as a cycle with two phases: a phase during which good perception opportunities, available in the near future, are checked, and an initial perception plan is composed; and an execution phase, during which the plan is monitored, detailed, and altered. The real-time alteration of parts of the plan is done while other parts are being executed, taking into consideration the outcome of previous actions. >

The development of a new navigation system with beacon receiver

Abstract: This paper describes the construction, functions and operation of the beacon-compatible navigation system, which is sold in Japan under the product name Multi-AV System. This system uses the location information broadcast by the roadside beacons to support a vehicle navigation function. When a vehicle receives the signal transmitted by a beacon, the on-board display unit presents road and traffic information broadcast by the beacon is used to automatically correct the vehicle location found by an independent dead-reckoning system.