Dual-Antenna Vehicle Remote Control for RF Dead Zone Reduction
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Solution Overview
Problem
Motorcycle remote control systems using wireless keys often misjudge the unlocking or locking status due to obstacles affecting the radio frequency signal, leading to incorrect timing and functionality.
Innovation Solution
A vehicle remote control system with two antennas and a wireless signal processing circuit that switches between them to reduce signal dead zones and prevent misjudgment, allowing accurate signal transmission and reception between the remote controller and the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single antenna is used for remote control signal reception, then the device complexity is reduced, but signal dead zones increase and measurement precision deteriorates
Solution Approach 1:
The patent divides the single antenna system into multiple antennas (first antenna and second antenna) positioned at different locations on the vehicle. Each antenna independently receives RF signals from the remote controller, and the processor selects or combines signals from different antennas to determine vehicle status, thereby eliminating signal dead zones and improving reception accuracy without significantly increasing system complexity.
2Speed
If high frequency RF signal is used for remote control, then the transmission speed is improved, but signal energy is more significantly reduced by obstacles
Solution Approach 1:
The patent introduces multiple antennas as intermediary reception points distributed at different locations on the vehicle. When obstacles block the direct path between the remote controller and the vehicle, the RF signal can still be received by antennas at different positions, providing alternative signal paths and preventing complete signal loss despite high frequency usage.
3Device complexity
If obstacle detection is not implemented, then the device complexity is reduced, but the reliability of vehicle status determination deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the processor continuously monitors RF signal characteristics from multiple antennas, compares signal strengths and quality metrics, and dynamically determines vehicle status based on this feedback. The system adjusts its determination logic based on real-time signal conditions, improving reliability without requiring complex obstacle 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
The system effectively reduces signal dead zones and prevents misjudgment of the remote control signal, ensuring accurate and timely unlocking or locking of the motorcycle.
Implementation Method 1
The wireless key includes a transmitting antenna, and the motorcycle includes a receiving antenna and a processor. When the processor determines that energy of a radio frequency (RF) signal from the wireless key is greater than or equal to a threshold value
Data Source
AI summary
A vehicle remote control system and an operation method thereof are provided. The vehicle remote control system includes a wireless signal processing circuit, a first antenna, a switch device, a signal transmission line, and a second antenna. The switch device is connected to the first antenna and one end of the signal transmission line. Another end of the signal transmission line is connected to the second antenna. When the switch device is in a first state, the wireless signal processing circuit reads a first signal of a remote controller received by the first antenna to calculate first state information. When the switch device is in a second state, the wireless signal processing circuit reads a second signal of the remote controller received by the second antenna to calculate second state information.