Title:
TRAIN CONTROLLING COMMUNICATION DEVICE
Document Type and Number:
Japanese Patent JP3284041
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve the safety by forming a train controlling signal transmitted from a transmitting means of superposition of two waves diffused by a PN code having a phase difference corresponding to train control, and assigning a larger phase difference to a higher-level speed information signal of train control.
SOLUTION: A prescribed standard PN code (PNi) assigned to a block section T from a PN code generating circuit (herein after referred to as PNG) is supplied to a pair of diffusion circuits 3a, 3b, and a PN code (PNi(1')) having a phase difference from PNi is supplied to the other diffusion circuit 3b. The phase difference 1 corresponds to ATC information, and a larger phase difference is assigned to a higher-level speed information signal of train control. Thus, even when phase detecting circuits 21, 121 erroneously confirm a noise as ATC information, this ATC information has a phase difference smaller than the natural ATC information, the aspect output is lower in level than that of the natural ATC information, so that the safety can be ensured.
Inventors:
Atsushi Sugawara
Masatoshi Umeyama
Hirofumi Utsumi
Masatoshi Umeyama
Hirofumi Utsumi
Application Number:
JP4531896A
Publication Date:
May 20, 2002
Filing Date:
February 07, 1996
Export Citation:
Assignee:
Nippon Signal Co., Ltd.
International Classes:
B61L1/18; B61L3/08; B61L23/16; H04B1/707; H04J13/00; H04J13/16; (IPC1-7): B61L3/08; H04J13/00
Domestic Patent References:
| JP5254431A | ||||
| JP5262235A | ||||
| JP5254435A | ||||
| JP5294239A | ||||
| JP7329782A |
Attorney, Agent or Firm:
Mitsumasa Ishii