Dynamic Wi-Fi Antenna Switching for Vehicle Sensing
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Solution Overview
Problem
Existing vehicle detection systems face challenges with inadequate spatial coverage and external disturbances affecting Wi-Fi signal accuracy, leading to missed detections and false positives, particularly in regions like the rear cabin where children may be present.
Innovation Solution
A vehicle system with dynamically switchable Wi-Fi antennas having different antenna characteristics and power control to ensure focused sensing coverage, improving spatial coverage and signal-to-noise ratios, reducing missed detections and false positives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple Wi-Fi antennas are used to improve spatial coverage, then detection coverage is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic antenna switching where the control module selectively activates different Wi-Fi sensor antennas based on real-time sensing requirements and vehicle conditions. This dynamic configuration allows the system to maintain comprehensive spatial coverage while avoiding the constant operational complexity of having all antennas active simultaneously.
Solution Approach 2:
Each Wi-Fi sensor antenna is positioned to focus on different regions of the vehicle (front cabin, rear cabin, etc.), creating localized sensing zones. The control module selects which antenna to activate based on which region requires monitoring, thereby providing targeted coverage rather than uniform omnidirectional coverage from all antennas.
2Measurement precision
If dynamic antenna switching is implemented to improve detection accuracy, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The system changes operational parameters by switching between different antenna configurations based on sensing requirements. The control module adjusts which antenna is active, modifying the physical parameter of signal transmission direction and focus to optimize detection accuracy for different vehicle regions and sensing scenarios.
Solution Approach 2:
The patent implements dynamic antenna switching where the control module selectively activates different Wi-Fi sensor antennas based on real-time sensing requirements and vehicle conditions. This dynamic configuration allows the system to maintain comprehensive spatial coverage while avoiding the constant operational complexity of having all antennas active simultaneously.
3Reliability
If power control is applied to reduce false positives, then reliability is improved, but use of energy increases
Solution Approach 1:
The system employs periodic sensing intervals rather than continuous transmission. The control module activates antennas in sequence for specific durations to perform sensing rounds, then enters idle periods. This periodic operation reduces energy consumption while maintaining reliable detection by ensuring that when sensing is active, appropriate power levels are applied to minimize false positives.
Solution Approach 2:
The system changes operational parameters by switching between different antenna configurations based on sensing requirements. The control module adjusts which antenna is active, modifying the physical parameter of signal transmission direction and focus to optimize detection accuracy for different vehicle regions and sensing scenarios.
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 detection accuracy by optimizing antenna placement and power control, ensuring comprehensive vehicle coverage and reducing false alarms through dynamic switching and signal management.
Implementation Method 1
the control module is configured to receive one or more reflected signals via the Wi-Fi sensor antennas
Data Source
AI summary
A vehicle system includes Wi-Fi antennas positioned to focus on different regions of a vehicle, and a Wi-Fi sensor module. The Wi-Fi sensor module includes Wi-Fi sensor antennas in communication with the Wi-Fi antennas, a control module, a transceiver module in communication with the control module, and a switching device in communication with the control module and the transceiver module. The control module is configured to receive a sensing request for the vehicle, determine sensing requirements for the Wi-Fi sensor antennas based on the sensing request, control the switching device to sequentially connect the Wi-Fi sensor antennas to the transceiver module based on the sensing requirements, and control the transceiver module to sequentially transmit a Wi-Fi signal to one or more of the Wi-Fi antennas via each connected Wi-Fi sensor antenna. Other example vehicle systems and control methods for Wi-Fi sensing are also disclosed.