Train Platform Rope Safety Device Torque Detection
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Solution Overview
Problem
Conventional train platform safety devices experience malfunctions and injuries due to direct impact when ropes hit passengers or obstacles, and require electrical power for detection, leading to unreliable operation and maintenance challenges.
Innovation Solution
A train platform safety device with a detection system that uses torque change and tensile force sensors to control rope movement, allowing the ropes to reverse direction upon hitting a passenger or obstacle, and includes an overload detection sensor and controller to manage motor operations, eliminating the need for a heavy touch bar and improving maintenance simplicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrical sensors are used to detect passengers and obstacles, then detection function is provided, but misoperation or malfunction occurs when foreign materials settle on the sensor or power supply stops
Solution Approach 1:
The patent replaces electrical sensors with a mechanical detection system using ropes that physically contact passengers or obstacles. When a rope hits an object, it generates a tactile signal that triggers the safety mechanism, eliminating dependency on electrical sensors that are susceptible to foreign material contamination and power loss.
Solution Approach 2:
The rope-based detection system is self-activating through direct physical contact. The rope itself serves as both the barrier and the detection mechanism, automatically triggering the safety response when impacted without requiring external power or complex sensor electronics.
2Ease of operation
If ropes move upward and downward to control platform access, then safety control is achieved, but direct impact injury or damage occurs when ropes hit passengers or obstacles
Solution Approach 1:
The patent incorporates a cushioning mechanism that activates when a rope contacts a passenger or obstacle. The system detects the impact through the rope's tactile response and subsequently reverses the rope's movement direction, preventing direct impact injury by cushioning the interaction between the moving rope and the affected object.
Solution Approach 2:
When the rope detects contact with a passenger or obstacle through tactile feedback, the system inverts the rope's movement direction. Instead of continuing upward motion that would cause impact, the rope is commanded to move downward, reversing the harmful action into a protective response.
3Reliability
If a heavy touch bar is used to detect obstacles, then obstacle detection is reliable, but device complexity and maintenance difficulty increase
Solution Approach 1:
The patent extracts the detection function from a separate heavy touch bar component and integrates it into the rope itself. The rope serves dual purposes as both the safety barrier and the detection element, eliminating the need for additional mechanical detection components and simplifying the overall system structure.
Solution Approach 2:
The rope is designed to perform multiple functions simultaneously: it acts as the safety barrier controlling platform access, the detection mechanism for obstacles and passengers, and the actuator for triggering the safety response. This multi-functionality eliminates the need for separate specialized components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively prevents accidents by reversing rope direction upon impact, reducing sensor malfunctions, and enhancing operational reliability and durability by eliminating the need for a heavy touch bar and simplifying maintenance.
Implementation Method 1
a torque change sensor detecting a torque change value of the motor occurring while the ropes (200) hit a passenger or an obstacle while moving
Implementation Method 2
a tensile force sensor provided on a middle part or one end of each of the ropes (200) so as to detect a tensile force change occurring when the ropes (200) hit a passenger or an obstacle while moving
Implementation Method 3
an overload detection sensor and controller to manage motor operations
Data Source
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AI summary
The present invention relates to a train platform safety device including a passenger and obstacle detection function, the train platform safety device including: multiple lifting/lowering units provided on selected portions of an entrance and an exit of a platform; at least two moving bodies provided in the lifting/lowering units; ropes provided horizontally; a motor moving the moving body upward and downward; and a detection means controlling the upward and downward movements of the moving body. According to the present invention, when the ropes hit a passenger or an obstacle while moving upward and downward, the platform safety device detects the hitting and stops or moves the ropes in a direction contrary to a direction in which each of the ropes is moving, thereby preventing accidents. Unlike the conventional detection device, frequent malfunctions or misoperations of the sensor caused by foreign materials do not occur, so that operation reliability is obtained.