Radio Wave Positioning for Collision Warning
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Solution Overview
Problem
Existing vehicle collision warning systems are ineffective for following vehicles, as they cannot detect approaching vehicles that may collide with road work zones, leading to potential accidents.
Innovation Solution
An information processing system using multiple transmission devices to send radio waves, which are received by a terminal device and measured for intensity, allowing a management device to calculate distances and positions, thereby estimating the course of movable objects and determining collision risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a warning system is installed for a single leading vehicle, then the leading vehicle can be warned of collision risks, but following vehicles cannot be detected or warned
Solution Approach 1:
The system uses multiple transmission devices arranged along the road to serve both leading and following vehicles. Each transmission device transmits radio waves that can be received by any vehicle in the monitoring area, making the system universally applicable to multiple vehicles rather than limited to a single leading vehicle.
Solution Approach 2:
The system transitions from monitoring a single vehicle in one dimension to monitoring multiple vehicles across multiple dimensions by introducing multiple transmission devices at different positions. This spatial dimensionality allows simultaneous detection and warning for both leading and following vehicles.
2Loss of information
If radio wave intensity measurement is used to calculate distance, then position estimation becomes possible, but measurement precision requirements increase
Solution Approach 1:
The system introduces multiple transmission devices as intermediaries between the vehicles and the monitoring system. By measuring radio wave intensities from multiple transmission devices at different known positions, the system can calculate vehicle position through triangulation or trilateration, converting a single precise measurement requirement into multiple less precise measurements that together provide accurate position information.
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 warns workers and drivers of potential collisions by accurately determining the position and speed of approaching vehicles, reducing accidents and injuries.
Implementation Method 1
the terminal device measures intensities of radio waves received from the transmission devices at predetermined times
Data Source
AI summary
An object is to estimate the course of a movable terminal device. An information processing system (S) includes a plurality of transmission devices (1a, 1b) capable of transmitting predetermined radio waves, a terminal device (2) capable of receiving the predetermined radio waves, and a management device (3) communicably connected to the terminal device. The terminal device (2) measures intensities of radio waves received from the transmission devices (1a, 1b) at predetermined times, and transmits measurement results to the management device (3). The management device (3) calculates distances between the terminal device (2) and each of the transmission devices (1a, 1b) at the predetermined times from the measurement results, and calculates positions of the terminal device (2) at the predetermined times from the calculated distances.