In-position real-time monitoring device for single boards in train signal system

Abstract

The invention discloses an in-position real-time monitoring device for single boards in a train signal system. The device is used for performing in-position real-time monitoring on a plurality of single boards under the control of a main control board, and comprises an FPGA connected with the main control board, wherein the FPGA is provided with an in-position monitoring output module, an in-position monitoring input module and an in-position real-time monitoring module, the in-position monitoring output module outputs in-position detection output signals to the single boards, the in-positiondetection output signals are high levels or low levels which are output in sequence position by position, the in-position monitoring input module receives in-position input signals from the single boards, the in-position real-time monitoring module detects the in-position input signals to judge whether or not the single boards are in position, the FPGA saves detected data into a register, and themain control board inquires the in-position states of the single boards through a bus in real time. The in-position real-time monitoring device for the single boards in the train signal system has theadvantages that the in-position states of the single boards can be detected in real time; the time-sharing reuse of pins can be achieved, it is achieved that the in-position detection of the multipleboards is achieved by using a small number of pins, and the pin resources are saved.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a train signal system. Background technique [0002] In a system with multiple boards, especially in a system where the main control board controls multiple identical boards, the system often needs to provide a board registration function, which can determine the number of boards and execute control programs with different configurations. [0003] At present, the commonly used way to monitor the on-position status of the single board in the system is to realize the pull-up and pull-down of the resistor, and connect the pull-up or pull-down resistor in the single board to the presence detection port through the backplane. [0004] The board in-position detection method currently used is mainly to reserve a resistor in the board, and pull the resistor to a high level or pull it down to a low level at the same time, and then detect the presence of the main control board throug...

AI Technical Summary

Problems solved by technology

This method is simple and quick to detect, but each board needs a pin for detection, which is a waste of pin resources. In a system with tight pin resources, the disadvantage of this method is more obvious, and it can be used for detection The number of single boards is very limited

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