Vehicle Unlocking Control Using Shielding-Corrected Radio Strength
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Solution Overview
Problem
Existing unlocking systems face accuracy issues when a shielding body interferes between a wireless terminal and a vehicle, leading to incorrect lock release and reduced user convenience.
Innovation Solution
An unlocking system that corrects radio wave strength information using shielding information to improve accuracy, analyzing appearance frequency distributions and applying correction data to determine the correct region for lock release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radio wave strength information is used directly for unlocking determination, then the unlocking system operates simply and quickly, but the accuracy deteriorates when a shielding body exists between the wireless terminal and the vehicle
Solution Approach 1:
The system performs preliminary actions by acquiring appearance frequency distribution information before making the final unlocking determination. The control device analyzes the distribution pattern of radio wave strength values and identifies whether the terminal is in a shielded state before using the strength information for position determination, thereby pre-processing the data to avoid erroneous conclusions caused by shielding bodies
Solution Approach 2:
The appearance frequency distribution serves as an intermediary indicator between the raw radio wave strength measurements and the final position determination. Instead of directly using the strength values, the system introduces this distribution analysis as an intermediate step to detect shielded states, allowing the system to indirectly identify shielding conditions and adjust its determination logic accordingly
2Reliability
If multiple antennas are used to receive wireless signals, then the system can gather more signal strength data for analysis, but the device complexity and processing load increase
Solution Approach 1:
The system segments the signal reception function across multiple antennas (first antenna and second antenna with different receiving environments) and processes the data from each antenna separately. By analyzing the appearance frequency distribution from each antenna's received signal strength, the system can compare patterns across segments to reliably detect shielded states, with each antenna acting as an independent detection segment
Solution Approach 2:
The control device performs multiple functions using the same antenna system: it not only receives wireless signals for position determination but also analyzes appearance frequency distributions to detect shielded states. The antenna system serves both as the signal reception component and as the basis for shielding detection, eliminating the need for separate dedicated shielding detection hardware
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
Enhances unlocking accuracy and user convenience by correcting radio wave strength based on shielding states, ensuring precise lock release.
Implementation Method 1
receiving antennas 20a to 20e that receive the wireless signal transmitted via radio waves from the wireless terminal 10
Data Source
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AI summary
There is provided an unlocking system capable of improving convenience of a user. An unlocking system 100 includes: a DK acquisition unit 30a that acquires strength information RI on strength of radio waves of a wireless signal received by receiving antennas 20a to 20e; and a DK execution unit 30b and an unlocking execution unit 40b that execute a shielded state determining process Sa, a region determining process Sb, and an unlocking control process Sc as an unlocking process of controlling release of a lock 21, the DK execution unit 30b acquires shielding information SI on a shielded state of a wireless terminal 10 based on the strength information RI in the shielded state determining process Sa, and corrects the strength information RI by using the shielding information SI in the region determining process Sb, and the unlocking execution unit 40b executes control for releasing the lock 21 based on region information ZI acquired based on the corrected strength information RI in the unlocking control process Sc.