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Title:
TRAIN SPEED DETECTING APPARATUS, TRAIN ACCELERATION DETECTING APPARATUS, AND CROSSING GATE ARM CONTROLLING APPARATUS
Document Type and Number:
Japanese Patent JP3301001
Kind Code:
B2
Abstract:

PURPOSE: To provide a train speed detecting apparatus, a train acceleration detecting apparatus, and a crossing gate arm controlling apparatus for which signal transmission wire does not need installing between a railway car detecting apparatus and a computer.
CONSTITUTION: Light emitting sources (3-1)-(3-5) are installed at a constant distance L from one another along a railway and these light emitting sources (3-1)-(3-5) are monitored by a photosensor of a main apparatus 4. Based on the output of the photosensor, the alteration (the decrease, the increase) of the number of the light emitting sources is detected and based on the timing Tj, Tj-1 of the detection, a railway car speed Spj is calculated from an expression Spj=K/(Tj-Tj-1). A railway car acceleration Acj can be calculated from an expression Acj=(Spj-Spj-1)/(Tj-Tj-1).


Inventors:
Hisashi Kurosaki
Kouichi Yomugihara
Application Number:
JP14325794A
Publication Date:
July 15, 2002
Filing Date:
June 24, 1994
Export Citation:
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Assignee:
Nippon Signal Co., Ltd.
International Classes:
G01P3/68; B61L1/02; B61L29/22; G01P15/16; (IPC1-7): G01P3/68; B61L1/02; B61L29/22; G01P15/16
Domestic Patent References:
JP7128347A
JP5264744A
JP52102076A
Attorney, Agent or Firm:
Hiroyuki Niwa (1 outside)