Transmitter and receiver device for train detection

• US 7,027,901 B2
• Filed: 11/30/2004
• Issued: 04/11/2006
• Est. Priority Date: 05/15/1997
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Kawabata, Atsushi, Tanifuji, Shinya, Oguma, Kenji, Fujiwara, Michio, Tashiro, Korefumi
• Primary Examiner(s): Keith, Jack
• Assistant Examiner(s): To, Tuan C
• Application Number:
  US10/998,753
• Publication Number:
  US 20050075765A1
• Time in Patent Office: 497 Days
• Field of Search: 701/19, 701/20, 701/207, 701/35, 701/117, 701/125, 246/28.R, 246/169.R, 246/34.B, 246/167.R, 246/27, 246/41, 340/3.1, 340/5.64, 340/5.71, 340/2.4, 341/176
• US Class Current: 701/19
• CPC Class Codes: B61L 1/188 Use of coded current
• CPC Class Codes: B61L 23/168 using coded current

Abstract

A transmitter and receiver device used together with a control device provided on ground, which performs detection of a train, performs transmission and reception of a train detecting signal, and collates data added to a received train detection signal with predetermined data. A transmitter, to be connected to a track circuit, transmits a train detecting signal, to the track circuit, and a receiver, to be connected to the track circuit, receives the train detecting signal from the track circuit. The transmitter adds a first unique code to the train detecting signal transmitted from the control device provided on the ground and transmits the same to the track circuit. The receiver adds a second unique code to the train detecting signal which was the first unique code added thereto and received from the track circuit and transmits the same to the control device provided on the ground.

Claims

1. A transmitter and receiver device which is used together with a control device provided on ground, which performs detection of a train, performs transmission and reception of a train detecting signal, and collates data added to a received train detection signal with predetermined data, comprising:

a transmitter, to be connected to a track circuit, which transmits a train detecting signal to the track circuit; and

a receiver, to be connected to the track circuit, which receives the train detecting signal from the track circuit;

wherein the transmitter adds a first unique code to the train detecting signal transmitted from said control device provided on the ground and transmits the same to the track circuit; and

wherein the receiver adds a second unique code to the train detecting signal being added of the first unique code received from the track circuit and transmits the same to said control device provided on the ground.

2. A transmitter and receiver device according to claim 1, wherein the first unique code data and the second unique code data are different for every track circuit.

3. A transmitter and receiver device which is used together with a control device provided on ground, which performs detection of a train, performs transmission and reception of a train detecting signal, and collates data added to a received train detection signal with predetermined data, comprising:

a transmitter, to be connected to a track circuit, which transmits a train detecting signal to the track circuit;

a receiver, to be connected to the track circuit, which transmits the train detecting signal from the track circuit;

wherein the transmitter applies a logical operation to the train detecting signal transmitted from said control device provided on the ground with a first unique code and transmits the same to the track circuit; and

wherein the receiver applies a logical operation to the train detecting signal received from the track circuit with a second unique code and transmits the same to said control device provided on the ground.

4. A transmitter and receiver device according to claim 3, wherein the first unique code data and the second unique code data are different for every track circuit.