[특허]Method and apparatus for remote control of a locomotive throttle controller

Method and apparatus for remote control of a locomotive throttle controller 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B61K-013/00
출원번호	US-0349320 (1994-12-05)
발명자 / 주소	Roselli Leonard (Murrysville PA) Wolf Daniel J. (Pittsburgh PA) Balukin Gregory S. (Pittsburgh PA) Pfaff John (Pittsburgh PA)
출원인 / 주소	Westinghouse Air Brake Company (Wilmerding PA 02)
인용정보	피인용 횟수 : 41 인용 특허 : 0

초록 ▼

A protocol is provided for bi-directional communication of control signals between a host unit and a slave unit. The protocol is particularly adapted to the control of a locomotive from a remote host computer. The protocol provides for transmission of digital signals indicative of control commands from the host computer to the slave computer, and simultaneous transmission of digital signals indicative of diagnostic information from the slave computer to the host computer. Information is transmitted in the form of data packets, and means are provided, in the receiving computer, for detecting corruption of transmission, or loss of transmission, and for providing a safe response to either of such conditions.

대표청구항 ▼

A method for controlling a locomotive from a remote host first computer, said locomotive having a throttle controller equipped with a second computer, said method comprising the steps of: (a) establishing two-way transmission of signals representing digital data packets between said first computer and said second computer; (b) transmitting signals representing digital data packets representing engine control commands from said first computer to said second computer at time intervals no greater than a predetermined maximum time interval, each of said data packets including the following bytes disposed sequentially in time, (I) two bytes of data which serve as a start flag for said data packet, (II) one byte of data, which is reserved as an address for said data packet, (III) one byte of data, which is reserved to indicate different types of packet, (IV) two bytes of data, a first header byte representing the type of information represented by said data packet and a second header byte representing a version number, used to facilitate implementation with successive software versions, (V) at least one byte of information, (VI) at least two bytes representing integers calculated for a cyclic redundancy check, and (VII) two bytes which serve as an end flag for said data packet, wherein ambiguity between said at least one information byte in Step (V) and said end flag bytes of Step (VII) is eliminated by the following substeps, (A) using known numeric values for said end flag bytes, (B) selecting a first byte of said end flag bytes, and, whenever the numeric value of said first byte appears in the stream of bytes to be transmitted, transmitting its numeric value twice in sequence, and (C) in said second computer, interpreting said twice transmitted numeric value as a single byte of information, and not as an end flag; (c) driving signals on trainlines via said throttle controller means based on said engine control commands; and (d) responding to one of corruption of transmission and loss of transmission from said first computer.

이 특허를 인용한 특허 (41)

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Method and apparatus for remote control of a locomotive throttle controller 원문보기

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Method and apparatus for remote control of a locomotive throttle controller 원문보기

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