# US 2018/0022368 A1 · Train data transmission system and train data transmission program

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- Number: US 2018/0022368 A1
- Document ID: US20180022368A1
- Status: Published application
- Kind: A1
- Application number: 15/546,845
- Filed: 2015-04-20
- Published: 2018-01-25
- Earliest claimed: 2015-04-20
- Assignees: Mitsubishi Electric Corporation
- Applicants: Mitsubishi Electric Corporation
- Inventors: Shogo TATSUMI; Ryoichi WATANABE; Tokiko SHIBASAKI; Hiromi GODA
- Web page: https://patentgrep.com/patent/US20180022368A1

## CPC

- B61L 15/0072: {On-board train data handling}
- B61L 15/0027: {Radio-based, e.g. using GSM-R}
- B61L 15/0036: {Conductor-based, e.g. using CAN-Bus, train-line or optical fibres}
- B61L 15/0081: {On-board diagnosis or maintenance}
- B61L 15/009: {On-board display devices}
- B61L 25/04: Indicating or recording train identities
- B61L: GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC (brakes or auxiliary equipment B61H, B61K; point or crossing construction E01B)

## Abstract

In the train data transmission system for a train including a plurality of cars, a front car of the train includes: a front car control device that is a central control device configured to send and receive data to and from a control device of a train information management device installed in a following car; an on-board instrument configured to send state information to the front car control device, and receive a control command from the front car control device; and a display device configured to request data from the front car control device using a transmission data format, and receive the data from the front car control device in accordance with the transmission data format. An address is assigned only to data of the front car in the transmission data format, and the display device allocates data of the following car in sequence.

## Claims

### Claim 1

A train data transmission system for a train including a plurality of cars, wherein
a front car of the train comprises:
a front car control device that is a central control device to send and receive data to and from a control device of a train information management device installed in a following car;
a display device to request data from the front car control device using a transmission data format, and receive the data from the front car control device in accordance with the transmission data format, and
an address is assigned only to data of the front car in the transmission data format, and the display device allocates data of the following car in sequence.

### Claim 2 (depends on 1)

The train data transmission system according to claim 1, wherein
the display device refers to formation information of the train to allocate the data of the following car in sequence.

### Claim 3

A computer-readable recording medium that stores therein a train data transmission program to control data transmission between a central control device of a train information management device provided in a front car of a train including a plurality of cars and a display device, the program being designed to cause a computer to execute:
determining, by a necessary data information collection unit of the display device, data to be collected and outputting a result of determination to a memory size calculation unit of the display device;
calculating, by the memory size calculation unit in response to receiving input of the result, a memory size by calculating, from the result, the number of pieces of data to be collected, and outputting a calculation result to a transmission data format generation unit of the display device;
generating, by the transmission data format generation unit in response to receiving input of the calculation result, a transmission data format in accordance with the calculation result, and requesting data from the central control device using the transmission data format;
storing, in response to receiving the transmission data format sent back from the central control device with the data written to the transmission data format, the data in a data storage unit of the display device via the necessary data information collection unit using the transmission data format sent back; and
performing, by the data storage unit, a display process on a display unit of the display device in accordance with the data.