AUTOMATIC TRAIN CONTROL AND ON-GROUND TRAIN DETECTOR

Title:

AUTOMATIC TRAIN CONTROL AND ON-GROUND TRAIN DETECTOR

Document Type and Number:

Japanese Patent JP2001114105

Kind Code:

A

Abstract:

To provide an ATC/TD on-ground device which can lower a peak value of a superimposed wave consisting of an ATC signal wave and a TD signal wave, in which an amplifier, a coupler and the like used for processing the superimposed wave can have a small capacity, and which can reduce the installation cost.

An ATC/TD on-ground device 1 issues an ATC signal wave S1 and a TD signal wave S2. The ATC signal wave S1 is obtained by intermittently modulating a carrier wave S11. Similarly, the TD signal wave S2 is also obtained by intermittently modulating a carrier wave S21. The ATC signal wave S1 and the TD signal wave S2 are issued with such a timing that a period T1 during which the carrier wave S11 is held does not overlaps with a period T2 during which the carrier wave S12 is held.

Inventors:

SAWADA YASUO

Application Number:

JP29497199A

Publication Date:

April 24, 2001

Filing Date:

October 18, 1999

Export Citation:

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Assignee:

NIPPON SIGNAL CO LTD

International Classes:

B61L3/16; B61L25/02; (IPC1-7): B61L3/16; B61L25/02

Attorney, Agent or Firm:

Abe Mijiro

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