BLE Transceiver Zone Proximity Detection for Passive Entry
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Solution Overview
Problem
Existing vehicle entry and start systems using remote keyless technology face challenges in efficiently determining the proximity of a mobile device to enable secure and convenient access and starting of vehicles without relying on traditional mechanical keys.
Innovation Solution
A passive entry and start system utilizing a Bluetooth Low Energy (BLE) module that transmits signals to determine the proximity of a mobile device via zones, allowing for secure unlocking and starting of vehicles based on signal strength, without the need for additional antennas or modules, thereby minimizing costs while maintaining security and convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple antennas or modules are added to improve location determination accuracy, then measurement precision is improved, but device complexity increases and manufacturing costs increase
Solution Approach 1:
The existing antenna is made multi-functional by implementing both transmission and reception capabilities, as well as role reversal functionality. The same antenna structure is used for different purposes: transmitting predetermined signals for location determination, receiving response signals from mobile devices, and potentially switching roles between different antennas in the system. This eliminates the need for separate dedicated antennas for each function, reducing overall system complexity while maintaining location determination accuracy.
Solution Approach 2:
The system determines device location by measuring signal strength parameters and comparing them against predefined thresholds to identify different zones (first zone, second zone, third zone). By changing the parameter being measured (signal strength) and using threshold-based classification, the system achieves accurate location determination without requiring multiple physical antennas or complex hardware modifications.
2Measurement precision
If multiple antennas or modules are added to improve location determination accuracy, then measurement precision is improved, but manufacturing costs increase
Solution Approach 1:
The existing antenna is made multi-functional by implementing both transmission and reception capabilities, as well as role reversal functionality. The same antenna structure is used for different purposes: transmitting predetermined signals for location determination, receiving response signals from mobile devices, and potentially switching roles between different antennas in the system. This eliminates the need for separate dedicated antennas for each function, reducing overall system complexity while maintaining location determination accuracy.
Solution Approach 2:
The system determines device location by measuring signal strength parameters and comparing them against predefined thresholds to identify different zones (first zone, second zone, third zone). By changing the parameter being measured (signal strength) and using threshold-based classification, the system achieves accurate location determination without requiring multiple physical antennas or complex hardware modifications.
3Ease of operation
If zone-based proximity determination is implemented, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The spatial area around the vehicle is segmented into distinct zones (first zone, second zone, third zone) based on signal strength thresholds. Each zone corresponds to a specific operational mode: vehicle starting in the first zone, door unlocking in the second zone, and no access in the third zone. This segmentation allows the system to automatically determine the appropriate action based on the mobile device's location, improving ease of operation while keeping the control logic manageable through clear threshold-based boundaries.
Solution Approach 2:
The system automatically determines the appropriate vehicle access action based on the mobile device's location in different zones. The control module automatically selects between vehicle starting, door unlocking, or maintaining locked state without requiring manual user input or complex control logic. The system serves itself by autonomously interpreting signal strength measurements and executing the corresponding access function.
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 secure and convenient vehicle access and starting by determining the mobile device's proximity through defined zones, eliminating the need for traditional keys and reducing system complexity and costs.
Implementation Method 1
a transceiver configured to: pair with a mobile device; and transmit a predetermined signal from an antenna to the mobile device
Data Source
AI summary
A transceiver is configured to: pair with a mobile device; and transmit a predetermined signal from an antenna to the mobile device. A zone module is configured to: receive a signal from the mobile device in response to the predetermined signal; and based on the signal, select a zone within which the mobile device is present from a group consisting of: a first zone that is defined by a first radius from the antenna; a second zone that excludes the first zone and that is defined by a second radius from the antenna, where the second radius is greater than the first radius; and a third zone that is radially outward of the second zone and that excludes the first and second zones.