Showing papers on "Obstacle published in 1981"

Automotive rear safety checking apparatus

Abstract: An automotive rear safety checking apparatus which comprises a plurality of obstacle detectors mounted on the rear part of the automobile for radiating ultrasonic wave on the watching areas smaller in width than the width of the automobile respectively and detecting the ultrasonic wave reflected from an obstacle. The ultrasonic wave is radiated from the obstacle detectors in time division. Pulse signals in the number associated with the distance between the obstacle detector and the obstacle are generated in response to the detection of the ultrasonic wave reflected from the obstacle, so that the relative positions of the automobile and the obstacle, are indicated two-dimensionally in accordance with the pulse signal.

Obstacle for toy vehicle track

Abstract: A pivotable vane positioned between lanes of a multi-laned track is actuated by a toy vehicle to obstruct one of the lanes after the vehicle has passed. In a slotless track any pursuing vehicle in an obstructed lane must be diverted to another lane or collide with the obstacle which is designed to throw a colliding vehicle off the track. In a slotted track, the pursuing vehicle in an obstructed lane must wait for the competitor to clear the obstacle.

The Nottingham Obstacle Detector: A Technical Description:

Abstract: This article gives technical information about the Nottingham Obstacle Detector and traces its development from the original design specifications to its final form. In producing this device, major...

Vortex-shedding flow meters

Abstract: not available for EP0038258Abstract of corresponding document: US4397192A vortex fluid flowmeter adapted to measure the flowrate of fluid passing through a conduit by measuring the frequency of emission of alternating vortices generated by an obstacle extending across the conduit, comprises a mesh structure mounted upstream of the vortex-shedding obstacle. Said mesh structure is constituted by a grid made of bars of wires of rectangular cross-section. The distance between the grid and the obstacle is so chosen that the obstacle be in the efficient working range of the grid.

Display device for obstacle at back for car

Abstract: PURPOSE:To display a distance between a car and an obstacle at the back of the car clearly, by illuminating a bar graph at the back of the car illustrated according to a distance of backward obstacle. CONSTITUTION:When a distance detecting signal to a backward obstacle by an ultrasonic wave distance detecting unit 2 including an operator 2b is applied, a bar graph 312 corresponding to a distance at the back of an illustrated car 311 on a display 3 illuminates, allowing to clearly display the distance between the car and the backward obstacle.

Automobile measuring device using doppler radar

Abstract: PURPOSE:To display various types of measured values, by providing a Doppler radar which varies the radiating angle of the electric wave back and forth as well as left and right in response to a steering handle and at the same time varies the angle obliquely to the road surface at the places near the front and rear bumpers of an automobile. CONSTITUTION:A front radar 4 is fixed to a front bumper 3 of an automobile 2. The radar 4 radiates horizontally a front electromagnetic wave 5 and receives the reflected wave from a front approaching obstacle to detect the presence of the obstacle. If the obstacle is moving, the distance to the obstacle can be measured from the Doppler frequency superposed on the reflected wave. A rear radar 7 is fixed to a rear bumper 6. The radar 7 radiates horizontally a rear electromagnetic wave 8 and receives the reflected wave from a rear approaching obstacle to detect the presence of the obstacle as well as to measure the distance to the obstacle. In such way, various factors needed for the safety driving of various types of automobiles can be measured and displayed. Among these factors are the travelling speed, the distance travelled, the detection for an obstacle, the distance to the obstacle, etc. Thus the safety is increased for for driving of automobiles.

Obstacle detecting method for measurement of distance between cars

Abstract: PURPOSE:To make it possible to detect the presence of an obstacle even at the time when the distance between a following car and the obstacle exceeds the measuring range, by making it possible for a wave-receiving unit of a preceding car to receive an ultrasonic is which was transmitted from the wave-transmitting unit of the preceding car and reflected by the obstacle. CONSTITUTION:The signal of a pulse width 2T transmitted from the wave-transmitting unit 8 of a following car 2 is received by the wave-receiving unit 5 of the preceding car 1 and the ultrasonic wave of a pulse width 1T is transmitted from the wave-transmitting unit 3, and this wave is received by the wave-receiving unit 10 and measured by an operation processing circuit 25 to determine the distance between these two cars. In case if the distance between the following car 2 and the obstacle 11 exceeds 25 meters, the signal from the wave-transmitting unit 3 is reflected by the obstacle 11 and received by the wave-receiving unit 5, the ultrasonic wave of a pulse width 3T is transmitted from the wave-transmitting unit 3 to the wave-receiving unit 10 to make interruption to the operation processing device 25 for determination of the distance between the following car and the obstacle 11. And therefore, it is possible to detect a distance between the car and the obstacle irrespectively of the distance between the following car and the obstacle.

Gamesplaying An Obstacle to Cost-Effective Grant Spending

Abstract: According to Dorothy Jongeward, author of Everybody Wins: Transactional Analysis Applied to Organizations,