Browse Prior Art Database

Impending Crash Detection System

IP.com Disclosure Number: IPCOM000038347D
Original Publication Date: 1987-Jan-01
Included in the Prior Art Database: 2005-Jan-31
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Hardcastle, B: AUTHOR [+2]

Abstract

An impending crash detection system for tracked vehicles comprises a set of electromagnetic radiation emitter/sensors on each vehicle cooperating with retroreflectors on another vehicle or body. The emitter/sensor sets are angularly disposed so that they provide sequential signals indicative of decreasing separation, which are transmitted to a movement controller to reduce the selected drive speed at predetermined separations and, ultimately, to stop the movement. In the example shown in the drawings, the vehicles are handlers 1 and 2 linearly movable upon fixed rails (not shown) extending between end stops 3 and 4. The handlers are of similar construction and each consists of a carriage 5 supporting an extendable fork lift mechanism 6 movable upon a vertical post 7.

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Impending Crash Detection System

An impending crash detection system for tracked vehicles comprises a set of electromagnetic radiation emitter/sensors on each vehicle cooperating with retroreflectors on another vehicle or body. The emitter/sensor sets are angularly disposed so that they provide sequential signals indicative of decreasing separation, which are transmitted to a movement controller to reduce the selected drive speed at predetermined separations and, ultimately, to stop the movement. In the example shown in the drawings, the vehicles are handlers 1 and 2 linearly movable upon fixed rails (not shown) extending between end stops 3 and 4. The handlers are of similar construction and each consists of a carriage 5 supporting an extendable fork lift mechanism 6 movable upon a vertical post 7. At one end of the fixed rails, the end stop 3 includes a retroreflective surface 8 inclined to the vertical. The adjacent end face of the carriage 5 of handler 1 has a set of three superposed electric sensors 9, 10 and 11 on its near side, as seen in the drawing. Each sensor comprises an infrared emitter/detector pair. The emitter directs a beam of radiation downwardly and obliquely, so as to be reflected by the surface 8 back to the detector when the carriage reaches a predetermined minimum distance from the end stop. At the other end face of the carriage 5 of handler 1 is a retroreflective surface 12, similar to surface 8, for cooperating with a further bank of three electric sensors 13, 14 and 15 on the opposed face of handler 2. Not visible, on the far s...