Wireless Communication Device Train Stop Detection
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Solution Overview
Problem
The existing wireless communication systems for determining train stop state and position require dedicated ground facilities on both the train and station sides, leading to increased installation costs.
Innovation Solution
A wireless communication system comprising a ground wireless communication device and an on-vehicle wireless communication device that operates in data transmission and radar modes to detect train stoppage, allowing for the control of a movable fence on the station platform, reducing the need for extensive ground-side infrastructure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dedicated ground facilities (IC tags and IC tag readers) are installed on both the train and station sides to determine train position and stop state, then train position determination accuracy is improved, but ground facility installation cost increases
Solution Approach 1:
The wireless communication device on the ground side is designed to perform multiple functions: it serves as both a communication device for data transmission and a radar device for detecting train stop state. This multi-functionality eliminates the need for separate dedicated facilities, reducing ground facility installation complexity while maintaining measurement precision through the radar detection capability.
2Reliability
If separate facilities are provided for data transmission and train stop detection, then functional reliability is improved, but device complexity and installation cost increase
Solution Approach 1:
The patent combines the data transmission function and the train stop detection function into a single wireless communication device on the ground side. The device operates in different modes (communication mode and radar mode) to perform both functions, thereby reducing facility configuration complexity while maintaining functional reliability through integrated design.
Solution Approach 2:
The ground wireless communication device is designed as a universal device that can switch between communication mode for data transmission and radar mode for stop detection. This multi-functional design ensures that both data transmission and stop detection functions are reliably performed by a single facility, reducing overall system complexity.
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
Enables efficient data transmission and accurate detection of train stoppage, reducing installation costs while ensuring safe operation of movable fences, thereby enhancing safety and reducing infrastructure expenses.
Implementation Method 1
a ground wireless communication device... in a radar mode wirelessly detects whether the train is stopped
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 3
AI summary
A wireless communication system includes a first wireless communication device and a second wireless communication device that wirelessly communicates with the first wireless communication device. One of the first and second wireless communication devices is disposed in a mobile object, and the other is fixed. The first wireless communication device includes a wireless transmission/reception unit that transmits data to the second wireless communication device and performs wireless transmission and reception in order to detect whether the mobile object is stopped. When, in a first mode for transmitting data to the second wireless communication device and determining whether the reception strength of a received signal is equal to or greater than a first value, the first wireless communication device detects that the reception strength is equal to or greater than the first value, the first wireless communication device stops the transmission of data to the second wireless communication device, exits the first mode, and transitions to a second mode for determining whether the mobile object is stopped. Upon detecting in the second mode that the mobile object is stopped, the first wireless communication device exits the second mode and transmits data to the second wireless communication device.