Train Door Intelligent Control Unit Circuit Simplification
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Solution Overview
Problem
The existing door logic control systems in multiple-unit trains are prone to failures due to complex structures involving many relays and cables, leading to high risks of circuit board burning and extensive failures when modifications are needed, with current protection methods being inadequate.
Innovation Solution
A logic intelligent control system based on intelligent control units, comprising a first intelligent control unit in a selected vehicle and second intelligent control units in remaining vehicles, with door controllers in each vehicle, utilizing contactless control to simplify the control circuit and reduce the risk of failures, and including speed signal acquisition ports to manage door operations based on train speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large number of relays and penetrating cables are used in the door logic control circuit, then the control function can be achieved, but the system complexity increases and the risk of failure increases
Solution Approach 1:
The patent replaces the traditional mechanical relay-based control system with an intelligent control unit that uses electronic processing and communication protocols. The intelligent control unit receives door control instructions, processes them according to preset logic, and outputs control signals to door controllers, eliminating the need for numerous relays and complex cable connections while improving system reliability and reducing failure risks
Solution Approach 2:
The intelligent control unit serves multiple functions: it acts as a logic controller, a signal processor, a communication node, and a protection device. By integrating these functions into a single multi-functional unit, the patent reduces the number of separate components needed, simplifies the control circuit, and improves overall system reliability
2Adaptability or versatility
If circuit reformation is carried out on the original circuit, then the control function can be improved, but the manufacturing cost and complexity increase
Solution Approach 1:
The patent divides the train into multiple vehicles, each with its own intelligent control unit and door controllers. This segmentation allows each vehicle to be manufactured and tested independently, and the intelligent control units can be produced using standardized processes. The modular architecture simplifies manufacturing compared to reformatting complex original circuits across the entire train system
Solution Approach 2:
The intelligent control unit uses software-based logic control with configurable parameters and thresholds. This allows the control system to be adapted to different requirements by changing software parameters rather than physically modifying circuits, significantly reducing manufacturing complexity and cost while maintaining high adaptability
3Device complexity
If protection is concentrated on the air switch side, then the protection structure is simple, but a single fault causes large-area failure
Solution Approach 1:
The patent implements segmented protection by placing intelligent control units in each vehicle that independently monitor and protect their respective door control circuits. Each intelligent control unit acts as an independent protection zone, so that a fault in one vehicle does not propagate to other vehicles, eliminating large-area failures while maintaining relatively simple protection structures
Solution Approach 2:
The intelligent control unit serves as an intermediary between the power supply and door controllers, providing intelligent monitoring and protection. It can detect abnormal conditions, isolate faults, and prevent damage propagation, offering more effective protection than simple air switches while maintaining structural simplicity through integrated design
Data Source
AI summary
Embodiments of the present invention disclose a logic intelligent control system of train door based on intelligent control unit. The system comprises: a first intelligent control unit located in a selected vehicle of a train, a second intelligent control unit located in each of the other remaining vehicles of the train, and a door controller located in each vehicle. The first intelligent control unit is configured to output corresponding door control instructions through the corresponding door control instruction output port after acquiring door control operation information; the door control instruction input ports corresponding to the first intelligent control unit and the second intelligent control units are configured to drive corresponding door controller control ports to control the door controllers of a corresponding vehicle to execute the door control instruction after receiving the door control instructions.