Obstacle

About: Obstacle is a research topic. Over the lifetime, 9517 publications have been published within this topic receiving 94760 citations. The topic is also known as: impediment & barrier.

Apparatus and method for providing obstacle information in autonomous mobile vehicle

Abstract: An apparatus for providing obstacle information in an autonomous mobile vehicle and a method thereof, in which a target object is determined to be what obstacle by combining pieces of information received from a laser distance sensor and radars, thereby enabling the autonomous driving of a vehicle. The apparatus and method for providing obstacle information in an autonomous mobile vehicle, which is capable of providing robust obstacle information not only in environments normal times, but also dust environments by combining a laser distance sensor and radars. A problem that an obstacle through which a mobile unit can pass, such as dust, is mistaken for an obstacle through which the mobile unit cannot pass can be solved.

An assessment of auditory-guided locomotion in an obstacle circumvention task

Abstract: This study investigated how effectively audition can be used to guide navigation around an obstacle. Ten blindfolded normally sighted participants navigated around a 0.6 × 2 m obstacle while producing self-generated mouth click sounds. Objective movement performance was measured using a Vicon motion capture system. Performance with full vision without generating sound was used as a baseline for comparison. The obstacle’s location was varied randomly from trial to trial: it was either straight ahead or 25 cm to the left or right relative to the participant. Although audition provided sufficient information to detect the obstacle and guide participants around it without collision in the majority of trials, buffer space (clearance between the shoulder and obstacle), overall movement times, and number of velocity corrections were significantly (p < 0.05) greater with auditory guidance than visual guidance. Collisions sometime occurred under auditory guidance, suggesting that audition did not always provide an accurate estimate of the space between the participant and obstacle. Unlike visual guidance, participants did not always walk around the side that afforded the most space during auditory guidance. Mean buffer space was 1.8 times higher under auditory than under visual guidance. Results suggest that sound can be used to generate buffer space when vision is unavailable, allowing navigation around an obstacle without collision in the majority of trials.

Vehicle surrounding-area monitoring apparatus

Abstract: A vehicle surrounding-area monitoring apparatus that, when recognizing an obstacle, allows for easy determination of the positional relationship between the obstacle and scenery included in a video image of the area surrounding the vehicle, generates a narrow view-field region that is a part of the video image as a notable video image, and if an obstacle region that is a region of the recognized obstacle in the video image is located outside of the narrow view-field region and if the obstacle region is contained in an image region that is partially overlapping with the narrow view-field region and is a part of the video image, generates the image region as a notable obstacle image so as to generate a surrounding-area monitoring display image comprised of the notable video image and the notable obstacle image.

Three-dimensional hybrid simulation of magnetized plasma flow around an obstacle

Abstract: The interaction between the magnetized plasma flow and an obstacle was investigated in the computer simulations described here by using a three-dimensional hybrid code (kinetic ions and massless fluid electrons). The results, which are relevant to the interaction between the solar wind and an unmagnetized planet (Venus or Mars), show that fundamental structures (bow shock and magnetotail) are formed. When a reflecting boundary is used at the obstacle, the magnetic field configuration was clearly asymmetrical in the direction of the convection electric field. This asymmetry is a result of differences in ion acceleration due to the convection electric field. Asymmetry is also evident when the size of the obstacle is close to the Larmor radius of protons. The shock of a smaller obstacle is weaker than that of a larger obstacle, but the shock size is almost independent of the obstacle size.

Vehicular obstacle complying device

Abstract: PURPOSE:To enable accurate information to be reliably given to an occupant according to the degree of damages by obstacles to one's own vehicle and also to enable protection for the occupant in relation to collision to the obstacles to be performed in advance CONSTITUTION:A vehicular obstacle complying device is provided with an obstacle detecting means 2 for detecting an obstacle A existing on the periphery of a vehicle 1, an obstacle degree judging means 4 for judging the obstacle degree of the detected obstacle A to one's own vehicle on the basis of the relative distance D and the relative velocity V between the obstacle A and one's own vehicle, a seat belt device 5 capable of adjusting the belt tension in fitting, and a belt adjusting means 16 for increasing the belt tension of the seat belt device 5 according to the obstacle degree so that the belt tension of the seat belt device 5 may be increased as the obstacle degree judged by the obstacle degree judging means 4 is large