Display device and on-board information display method

An on-board information display method for a display device mounted on a cab of a train, the train comprising a plurality of devices mounted on a plurality of cars, the method comprising:

• a signal definition acquisition step, by a processor, of obtaining a plurality of signal definitions respectively specifying a set of devices mounted on a car and defining information to request on a status of the set of devices mounted on the car, wherein the set of devices is part of the plurality of devices;
• a configuration information acquisition step, by the processor, of acquiring configuration information including information on a number of cars and a traveling direction of the train, which is acquired by an on-board information transmission unit mounted on a car;
• a first signal generation step, by the processor, of after acquiring the configuration information including the number of cars and the traveling direction of the train, generating a plurality of first signals comprising at least one separate signal specific to each device of the plurality of devices, based on (a) each device on each car specified in a plurality of signal definitions and (b) the number of cars specified in the configuration information for requesting information on a plurality of statuses of the plurality of devices;
• a second signal value acquisition step, by the processor, of acquiring a plurality of values of a plurality of second signals that is information on the status of the plurality of devices in response to the plurality of first signals;
• a signal mapping information generation step, by the processor, of generating signal mapping information for specifying an arrangement of the plurality of cars on a display screen on which the plurality of statuses of the plurality of devices are displayed, based on the configuration information;
• a storage step, by the processor, of controlling a storage position of each value of each second signal in a drawing processor, based on the signal mapping information, to accordingly store each value of each second signal in the drawing processor;
• a drawing data holding step, by the drawing processor, of holding drawing data that is the plurality of values of the plurality of second signals in drawing tables in units of drawing parts into which display contents displayed on the display screen are transformed;
• and
• a display step, by the drawing processor, of displaying the plurality of statuses of the plurality of devices on the display screen using a plurality of drawing parts, based on the drawing data held in the drawing tables.

A display device mounted on a cab of a train, the device comprising:

• a drawing processing circuitry to display a plurality of statuses of a plurality of devices mounted on a plurality of cars of the train;
• and
• a data collection circuitry comprising:
• a signal definition holding circuitry to hold a plurality of signal definitions respectively specifying a set of devices mounted on a car and defining information to request on a status of the set of devices mounted on the car, wherein the set of devices is part of the plurality of devices;
• a signal mapping management circuitry to acquire configuration information including information on a number of cars and a traveling direction of the train, which is acquired by an on-board information transmission circuitry mounted on a car, and after acquiring the configuration information including the information on the number of cars and the traveling direction of the train, generate a plurality of first signals comprising at least one separate signal specific to each device of the plurality of devices, based on (a) each device on each car specified in the plurality of signal definitions and (b) the number of cars specified in the configuration information to request information on the plurality of statuses of the plurality of devices;
• a signal data storage circuitry to hold a plurality of values of a plurality of second signals that is information on the plurality of statuses of the plurality of devices acquired by the signal mapping management circuitry in response to the plurality of first signals;
• and
• a signal mapping generation circuitry to generate signal mapping information for specifying an arrangement of the plurality of cars on a display screen on which the plurality of statuses of the plurality of devices are to be displayed, based on the configuration information acquired from the signal mapping management circuitry, and output the signal mapping information to the signal data storage circuitry.