Vehicle Key Identification Using Camera-Directed Antenna Power
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Solution Overview
Problem
Existing vehicle access systems often require a transmitter to be in close proximity to the vehicle antenna for unlocking, limiting convenience and range of operation.
Innovation Solution
Utilizing a vehicle camera to recognize a person, determine their position and movement direction, and increase the transmission power of the vehicle antenna towards that person, enabling identification of a vehicle key from a greater distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the transmission power of the vehicle antenna is increased to extend the detection range, then the identification distance of the vehicle key is improved, but the total power consumption and interference with other antennas worsen
Solution Approach 1:
The antenna system dynamically adjusts transmission power based on real-time detection needs. When a person is detected by the camera, the system activates only the antenna in the corresponding sector to transmit at high power, while other antennas maintain low or zero power, creating a dynamic power distribution that adapts to spatial requirements
Solution Approach 2:
The antenna system is divided into multiple independent antennas, each covering a specific sector. This segmentation allows individual antennas to be activated selectively based on the detected person's position, so that only one antenna operates at high power at a time rather than all antennas operating simultaneously, reducing total power consumption while extending effective detection range
2Measurement precision
If the maximum transmission power of the antenna is temporarily increased towards the recognized person, then the identification distance is improved, but the power distribution among multiple antennas becomes unbalanced
Solution Approach 1:
The system applies different power levels to different antennas based on local spatial requirements. The antenna facing the detected person transmits at maximum power to ensure reliable identification, while other antennas operating in different sectors maintain lower or zero power, creating a localized high-power zone precisely where needed without requiring all antennas to operate at high power simultaneously
3Ease of operation
If the detection range of the vehicle antenna is extended using higher power, then the convenience of approaching the vehicle is improved, but the safety and security verification becomes more challenging
Solution Approach 1:
The camera system serves as an intermediary that first detects and identifies the person before the antenna attempts key identification. This two-stage process with the camera as mediator ensures that high-power antenna transmission is only activated when a recognized person is present, maintaining security by verifying both identity and proximity through multiple independent checks
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 convenience and safety by allowing vehicle functions to be performed from a greater distance, efficiently increasing the detection range of the vehicle antenna while maintaining total power specifications.
Implementation Method 1
an increase of the maximum transmission power of the determined antenna of the vehicle towards the position of the recognized person
Data Source
AI summary
A method for identifying a vehicle key includes recognizing a person at least in part using a vehicle camera and detecting a position and a movement direction of the recognized person at least in part using the vehicle camera. The method also includes determining an antenna of the vehicle depending on the movement direction of the recognized person, and increasing a maximum transmission power of the determined antenna of the vehicle towards the position of the recognized person. The method further includes identifying a vehicle key of the person using the increased maximum transmission power of the determined antenna.