Satellite Positioning Braking Control for Route-End Overrun
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Solution Overview
Problem
Existing vehicle-mounted devices for preventing overrun at the tail end of a route based on ground transponder technology are not suitable for test routes due to high investment costs, complex maintenance, and low positioning precision.
Innovation Solution
A vehicle-mounted device utilizing a satellite positioning system with modules for real-time speed acquisition, positioning calibration, distance calculation, and automatic braking, which eliminates the need for ground transponders and ensures high positioning precision with a simple structure and low maintenance costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ground transponder technology is used for vehicle positioning and protection, then positioning and protection function is achieved, but investment cost and maintenance cost increase significantly
Solution Approach 1:
The patent extracts the positioning function from the ground-based transponder system and relocates it to the vehicle-mounted device using satellite positioning. This eliminates the need for expensive ground transponders while maintaining the core positioning and protection functionality, directly resolving the contradiction between reliability and manufacturing cost.
Solution Approach 2:
The patent introduces satellite positioning signals as an intermediary to replace the ground transponder system. The satellite signals serve as the medium for positioning information transmission, enabling the vehicle to determine its position and receive protection commands without requiring ground-based infrastructure, thus reducing investment and maintenance costs.
2Reliability
If ground transponder technology is used for vehicle positioning and protection, then positioning function is achieved, but device complexity increases
Solution Approach 1:
The patent extracts the positioning functionality from the complex ground transponder system and consolidates it into a simplified vehicle-mounted device that uses satellite positioning. This reduces the overall system complexity by eliminating ground infrastructure while maintaining positioning and protection capabilities.
Solution Approach 2:
The vehicle-mounted device performs self-positioning using satellite signals without requiring external ground transponders. The device independently calculates position, determines route status, and executes protection commands, reducing system complexity by eliminating the need for complex ground-based positioning infrastructure.
3Reliability
If ground transponder technology is used for vehicle positioning, then positioning function is achieved, but positioning precision is insufficient for test routes
Solution Approach 1:
The patent replaces the ground-based mechanical transponder system with satellite positioning technology. Satellite positioning provides higher measurement precision for vehicle location determination, which is critical for test routes where precise positioning is needed to prevent overrun accidents at route tail ends.
Solution Approach 2:
The patent changes the positioning parameter source from ground transponders to satellite signals. Satellite positioning provides more accurate position coordinates, enabling precise calculation of distance to route tail end and more accurate determination of braking requirements, thereby improving positioning precision for test route applications.
4Reliability
If ground transponder technology is used for vehicle protection, then protection function is achieved, but maintenance cost increases
Solution Approach 1:
The patent extracts the protection function from the ground transponder system and implements it in the vehicle-mounted device using satellite positioning. This eliminates the need for ground transponder maintenance while maintaining vehicle protection capabilities, directly reducing maintenance costs.
Solution Approach 2:
The patent uses satellite positioning signals as an intermediary to provide protection commands to the vehicle. This eliminates the need for ground transponder infrastructure that requires maintenance, while still enabling the vehicle protection function through satellite-based position monitoring and command transmission.
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 device effectively prevents vehicle overrun at the tail end of a route by using satellite positioning signals to calculate and enforce a safe braking distance, ensuring precise positioning and automatic emergency braking without the need for ground transponders, thus meeting the requirements of test routes with low investment and maintenance.
Implementation Method 1
a positioning module, which is configured to be connected to a satellite positioning system and is used for acquiring a satellite position of a vehicle
Data Source
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AI summary
Provided is a vehicle-mounted device for rash-advance prevention at the tail end of a route, the device comprising: a positioning module (101) for acquiring a satellite position of a vehicle; a calibration module (102) for carrying out positioning calibration on the satellite position and an actual position of the vehicle when the speed of the vehicle is zero; a speed acquisition module (103) for acquiring a current speed of the vehicle in real time and using same as a computational speed; a calculation module (104) for calculating and obtaining the current distance from the vehicle to a tail end and the braking distance corresponding to the current speed; a determination module (105) for determining whether a difference value between the current distance from the vehicle to the tail end and the braking distance is less than a pre-set safety margin; and a braking output module (106) for sending a braking instruction to a braking system when the difference value between the current distance from the vehicle to the tail end and the braking distance is less than the pre-set safety margin. Also provided is a method for controlling rash-advance prevention at the tail end of a route. The device and the method have a high positioning precision, a simple structure and a low maintenance cost, and can satisfy the requirement of a test route.