Security monitor device at station platflorm

• US 20060056654A1
• Filed: 07/24/2003
• Published: 03/16/2006
• Est. Priority Date: 07/25/2002
• Status: Active Grant

• Current Assignee: National Institute of Advanced Industrial Science and Technology (Government of Japan)
• Original Assignee: National Institute of Advanced Industrial Science and Technology (Government of Japan)
• Inventors: Yoda, Ikushi, Sakaue, Kasuhiko
• Granted Patent: US 7,460,686 B2
• Time in Patent Office: Days
• US Class Current: 382/103
• CPC Class Codes: B61L 23/00 Control, warning or like safety means along the route or between vehicles or trains
• CPC Class Codes: B61L 23/041 Obstacle detection

Abstract

The present invention provides a more reliable safety monitoring device on the station platform, where the safety monitoring device detects the fall of a person on the platform edge on the railroad-track side onto a railroad track with stability, recognizes at least two persons, and obtains the entire action log thereof. The present invention recognizes the person at the platform edge by distance information and texture information and determines the position on the platform edge. At the same time, the present invention detects the case where the person falls onto the railroad track with stability and automatically transmits a stop signal or the like. At the same time, the present invention transmits an image of the corresponding camera. Further, the present invention records the entire action of all persons moving on the platform edge.

Claims

1. A safety monitoring device in a station platform, the safety monitoring device being characterized by including image processing means for picking up a platform edge through a plurality of stereo cameras at the platform edge on the railroad-track side of a station and generating image information based on a picked-up image in the view field and distance information based on the coordinate system of the platform per stereo camera, means for recognizing an object based on distance information and image information transmitted from each of the stereo cameras, and means for confirming safety according to the state of the recognized object.

2. The safety monitoring device in the station platform according to claim 1, the safety monitoring device being characterized by further providing means for obtaining and maintaining the log of a flow line of a person in a space such as the platform.

3. The safety monitoring device in the station platform according to claim 1, the safety monitoring device being characterized in that the means for recognizing the object based on the distance information and the image information transmitted from each of the stereo cameras performs recognition using a higher-order local autocorrelation characteristic.

4. The safety monitoring device in the station platform according to claim 1, the safety monitoring device being characterized in that the means for recognizing the object based on said distance information and image information discerns between a person and other things from barycenter information on a plurality of masks at various heights.

5. The safety monitoring device in the station platform according to claim 1, the safety monitoring device being characterized in that the means for confirming the safety obtains said distance information and image information of the platform edge, detects image information of railroad-track area information, recognizes the fall of a person or the protrusion of a person or the like toward outside the platform according to the distance information of the image information, and issues a warning.

6. The safety monitoring device in the station platform according to claim 1, the safety monitoring device being characterized in that said higher-order local autocorrelation characteristic is used for determining ahead and behind time-series distance information existing at predetermined positions in a predetermined area, as one and the same person.

7. The safety monitoring device in the station platform according to claim 6, the safety monitoring device being characterized in that the predetermined positions correspond to a plurality of blocks obtained by dividing the predetermined area, and a next search for the time-series distance information is performed by calculating the higher-order local autocorrelation characteristic per at least two blocks of said plurality of blocks.