Smartphone Atmospheric Pressure Sensor for Pedestrian Overpass Detection
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Solution Overview
Problem
Existing electronic devices lack an efficient method to determine whether a user is crossing a pedestrian overpass, relying on inaccurate methods such as distance sensors and height sensors, which can lead to incorrect location estimation and excessive pedestrian alerts in vehicle communication systems.
Innovation Solution
A smartphone-based system that uses atmospheric pressure sensors to determine if the user is crossing a pedestrian overpass by comparing the change in atmospheric pressure with a predetermined threshold value, allowing precise identification of the user's location and reducing unnecessary alerts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If distance sensors and height sensors are used to determine user location, then location estimation can be performed, but measurement precision is insufficient leading to incorrect location estimation
Solution Approach 1:
The patent changes the measurement parameter from distance/height to atmospheric pressure. By using an atmospheric pressure sensor to detect pressure changes as the user moves between different elevations (ground level to overpass level), the system achieves more reliable location determination. The atmospheric pressure parameter provides a more distinct and measurable difference between locations than distance or height sensors alone.
2Measurement precision
If atmospheric pressure sensors are used to determine location, then measurement precision improves, but device complexity increases
Solution Approach 1:
The patent replaces mechanical/distance-based sensing systems with a pneumatic/atmospheric pressure-based system. Instead of using complex arrays of distance sensors and height sensors, the invention uses a single atmospheric pressure sensor that passively detects elevation changes through atmospheric pressure variations, simplifying the hardware while improving precision.
3Adaptability or versatility
If inaccurate location estimation is used in vehicle communication systems, then communication coverage is maintained, but harmful factors increase due to excessive false alerts
Solution Approach 1:
The patent implements a feedback mechanism where the atmospheric pressure sensor continuously monitors pressure changes and compares them against threshold values to determine when the user is on an overpass. This feedback loop enables the vehicle communication system to dynamically adjust alert generation based on accurate real-time location information, reducing false alerts while maintaining coverage.
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 accurately determines if the user is crossing the pedestrian overpass, reducing false alerts and improving safety by precisely identifying the user's location and reducing unnecessary communication in vehicle systems.
Implementation Method 1
a smartphone-based system that uses atmospheric pressure sensors to determine if the user is crossing a pedestrian overpass by comparing the change in atmospheric pressure with a predetermined threshold value
Data Source
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AI summary
Provided is an electronic device including a communication unit, an acquisition unit, and a controller. The communication unit communicates a roadside unit associated with a pedestrian overpass to acquire height information of the pedestrian overpass from the roadside unit. The acquisition unit acquires height calculation information for calculating the height information of the electronic device. The controller determines whether a user of the electronic device is crossing the pedestrian overpass based on the height information of the electronic device calculated based on the height calculation information and the height information of the pedestrian overpass.