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1. US5825412 - Video detection apparatus for monitoring a railroad crossing

Office United States of America
Application Number 08650164
Application Date 20.05.1996
Publication Number 5825412
Publication Date 20.10.1998
Grant Number 5825412
Grant Date 20.10.1998
Publication Kind A
IPC
H04N 7/18
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
7Television systems
18Closed-circuit television systems, i.e. systems in which the signal is not broadcast
B61L 29/00
BPERFORMING OPERATIONS; TRANSPORTING
61RAILWAYS
LGUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
29Safety means for rail/road crossing traffic
B61L 29/30
BPERFORMING OPERATIONS; TRANSPORTING
61RAILWAYS
LGUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
29Safety means for rail/road crossing traffic
24Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning
28electrically operated
30Supervision, e.g. monitoring arrangements
CPC
H04N 7/18
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
7Television systems
18Closed circuit television systems, i.e. systems in which the signal is not broadcast
B61L 29/00
BPERFORMING OPERATIONS; TRANSPORTING
61RAILWAYS
LGUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
29Safety means for rail/road crossing traffic
B61L 29/30
BPERFORMING OPERATIONS; TRANSPORTING
61RAILWAYS
LGUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
29Safety means for rail/road crossing traffic
24Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning
28electrically operated
30Supervision, e.g. monitoring arrangements
Applicants Esco Electronics Corporation
Inventors Hobson Gregory
Wootton John R.
Agents Polster, Lieder, Woodruff & Lucchesi LC
Title
(EN) Video detection apparatus for monitoring a railroad crossing
Abstract
(EN)

Apparatus (10) monitors a railroad crossing (X) for the presence of an object (H, V, A) in the crossing. The apparatus determines if an object is of sufficient size to damage to a train (1) approaching the crossing, and provides an alarm (Sa) to an approaching train so it can be timely halted. This prevents injury to people or other objects in the crossing, or to the train and its occupants. A camera (14) continuously views the crossing to obtain images of the crossing. An image processor (28) processes images, establishes the presence of objects in the crossing, and determines the size of the object. If appropriate, an alarm (26) is activated and an alarm signal is sent to the train through a relay (36) transmitter (44), and on board receiver (46). An audio alarm (48) on the train is sounded in response to receipt of the signal. The apparatus is unmanned and performs its monitoring function in a non-invasive manner by which its operation does not interfere with that of vehicles, pedestrians, or barriers (G) which may also be in place at the crossing.