Showing papers on "Obstacle published in 1976"
Patent•
06 Dec 1976
TL;DR: In this paper, a collision imminence computing circuit is used to generate two signals depending upon whether the obstacle is stationary or moving, i.e., whether the vehicle is moving or stationary.
Abstract: A radar sensor and a vehicle velocity sensor are mounted on a vehicle, producing three signals representative of, vehicle velocity, a distance and a relative velocity between the vehicle and an obstacle ahead thereof. These three signals are fed to a collision imminence computing circuit which generates two signals representative of collision imminences depending upon whether the obstacle is stationary or moving.
42 citations
TL;DR: In this article, an obstacle detection system using ultrasonic waves was proposed, where an ultrasonic transmitter-receiver and ultrasonic receiver are provided at a desired interval, and the distance and the direction to the obstacle are obtained by the intersecting point between the circular locus of the first reflected wave returning after reflection at the obstacle and the ellipsis of the second reflected wave to the ultrasonic receivers.
Abstract: The present invention relates to an obstacle detecting apparatus using ultrasonic waves, wherein an ultrasonic transmitter-receiver and an ultrasonic receiver are provided at a desired interval, and thereby the distance and the direction to the obstacle are obtained by the intersecting point between the circular locus of the first reflected wave returning after reflection at the obstacle, and the elliptical locus of the second reflected wave to the ultrasonic receiver. Under this structure, when any person or any obstacle like a building exists within the dead angle of a motor vehicle in case a driver is going to back it, the driver is informed of the distance and the direction to the obstacle by means of the obstacle detecting apparatus using ultrasonic waves.
24 citations
Patent•
09 Oct 1976
TL;DR: In this paper, moving objects are driven in high density by shortening the distace between two cars by altering the sensible distance of a detector in a specific zone of moving-object courses.
Abstract: PURPOSE:Moving objects are driven in high density by shortening the distace between two cars by altering the sensible distance of a detector in a specific zone of moving-object courses.
4 citations
Patent•
08 Nov 1976
TL;DR: An obstacle detection method for vehicle automatic operation system etc, that is realized to detect obstacle on a vehicle in automatic running system capable of controlling for vehicle by a computer on a specialized circulation route as discussed by the authors.
Abstract: PURPOSE:An obstacle detection method for vehicle automatic operation system etc, that is realized to detect obstacle on a vehicle in automatic running system capable of controlling for vehicle by a computer on a specialized circulation route
3 citations
TL;DR: In this paper, the initial stage of the impact of an axisymmetric fluid jet having a plane face on a rigid obstacle is investigated, and an example of a numerical calculation by a finite-difference method is cited.
Abstract: We shall investigate the initial stage of the impact of an axisymmetric fluid jet having a plane face on a rigid obstacle. An example of a numerical calculation by a finite-difference method [1] is cited.
3 citations
01 Nov 1976
TL;DR: The construction of an autonomous roving vehicle requires the development of complex data-acquisition and processing systems, which determine the path along which the vehicle travels, and a Terrain Modeller was developed which assembled and maintained a rectangular grid map of the planet.
Abstract: The construction of an autonomous roving vehicle requires the development of complex data-acquisition and processing systems, which determine the path along which the vehicle travels. Thus, a vehicle must possess algorithms which can (1) reliably detect obstacles by processing sensor data, (2) maintain a constantly updated model of its surroundings, and (3) direct its immediate actions to further a long range plan. The first function consisted of obstacle recognition. Obstacles may be identified by the use of edge detection techniques. Therefore, the Kalman Filter was implemented as part of a large scale computer simulation of the Mars Rover. The second function consisted of modeling the environment. The obstacle must be reconstructed from its edges, and the vast amount of data must be organized in a readily retrievable form. Therefore, a Terrain Modeller was developed which assembled and maintained a rectangular grid map of the planet. The third function consisted of directing the vehicle's actions.
3 citations
TL;DR: The second component, the strategy, was predicated on the assump? tion that the existing obstacles to the human development of the common man are not independent, but tend to reinforce each other in a definite pattern as discussed by the authors.
Abstract: ferent from a number of social Utopias based on Christian ethics. The more original contribution of the Movement was its strategy of de? velopment. The second component, the strategy, was predicated on the assump? tion that the existing obstacles to the human development of the common man are not independent, but tend to reinforce each other in a definite pattern. This pattern was idenified as consisting of the following sequence: a moral obstacle involving apathy, ignorance and helplessness that forms a barrier to hope, faith, courage and determina? tion; a psychological obstacle forming a barrier to motivation and ap? propriate attitudes; a social obstacle blocking co-operation and group formation toward the common goal; an economic obstacle preventing people from gaining ownership and control over economic institu
2 citations
Patent•
07 Oct 1976
TL;DR: In this paper, an obstacle detecting device which can require no large extension of a bumper and which can reduce the radius of gyration of a vehicle was proposed to provide an obstacle detection device.
Abstract: PURPOSE:To provide an obstacle detecting device which can require no large extension of a bumper and which can reduce the radius of gyration of a vehicle
1 citations
01 Jan 1976
1 citations
TL;DR: In this paper, the authors examined the effect of snow cover on obstacle crossing performance of vehicles and gave mathematical expressions describing step negotiation, trench crossing, and slope climbing on snow-covered obstacles.
1 citations