Interlock access control method

Abstract

The invention discloses an interlock access control method, which relates to the technical field of track traffic signal safety control and includes steps: S1 dividing various access states into a plurality of limited states and generating an access state transition diagram according to restrict relationship of resources related by access control; and S2 performing access control according to the access state transition diagram. The interlock access control method uses the access state transition diagram which is full in covering state as a reference, can well avoid possible safety hazard, simultaneously is easy in achieving method and improves control efficiency.

Description

technical field [0001] The invention relates to the technical field of rail transit signal safety control, in particular to an interlocking route control method based on a state transition diagram. Background technique [0002] A computer interlock system (Computer Interlock, CI) includes: an operation display machine, an interlock machine, and a controller of related equipment. Among them, the interlocking machine receives the command information transmitted by the upper display unit and the status information transmitted by the lower equipment controller, and performs interlocking inspection to ensure the safety of driving in the station. The interlocking machine is the core part of the interlocking system. The interlocking route control is the most important part of the interlocking machine. The route control performs a logical check on the status of the signal machine, turnout, section, route and trackside equipment , only after the logical checks are all passed and the...

AI Technical Summary

Problems solved by technology

[0005] 1. In the process of designing and implementing interlocking route control, it is easy to ignore the route states that should exist, resulting in the situation that the output of some route states in the program does not correspond to the corresponding route state, which is likely to cause system safety hazards and system vulnerabilities

[0006] 2. It is difficult for designers and coders to fully grasp the state of the approach, so the data structure and method are frequently modified during the design or coding process

However, the modification caused by incomplete consideration of the approach state is often large-scale, which not only leads to the continuous extension of the project period, but also the large-scale modification may cause more negligence of programmers, resulting in more security risks and system vulnerabilities

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