Motorcycle Rider Posture Tracking Using Wireless Phase Detection
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Solution Overview
Problem
Current wireless communication techniques for saddle-type vehicles, such as two-wheeled motor vehicles, can determine contact states but not accurately detect the driver's posture, which is crucial for vehicle control due to the driver's significant weight impact on vehicle behavior during driving.
Innovation Solution
A driver posture detection apparatus and method using multiple wireless receivers and transmitters with antennas, employing direction and position calculation sections to determine the driver's posture based on phase information from radio waves, reducing power consumption and enhancing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wireless communication techniques are used to detect driver contact state, then communication between vehicle and driver is enabled, but driver posture detection accuracy is insufficient
Solution Approach 1:
The patent transitions from detecting only contact state (2D binary state) to detecting 3D spatial position and posture by introducing phase information measurement and multi-antenna array geometry, enabling accurate determination of driver position and orientation in three-dimensional space
Solution Approach 2:
The patent replaces mechanical contact-based detection with electromagnetic wave-based phase information measurement, using radio wave phase differences to infer driver posture without physical contact sensors, thereby achieving non-contact high-precision posture detection
2Measurement precision
If multiple wireless receivers and transmitters with antennas are used to detect driver posture, then detection accuracy is improved, but electric power consumption increases
Solution Approach 1:
The patent implements periodic transmission of unmodulated radio waves at specific intervals rather than continuous transmission, allowing the wireless transmitter to enter low-power states between measurements, thereby reducing overall power consumption while maintaining detection accuracy through periodic updates
Solution Approach 2:
The patent extracts only the essential phase information from radio wave signals needed for posture calculation, rather than processing complete signal data, reducing computational load and power consumption of the processing units while maintaining detection precision
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 high-accuracy detection of the driver's posture with reduced electric power consumption, allowing for improved vehicle control and stability by calculating the driver's position and posture relative to the vehicle.
Implementation Method 1
a direction calculation section that calculates, based on phase information on radio waves from the wireless transmitter that are received by the wireless receiver, a direction of the wireless transmitter with respect to the wireless receiver
Data Source
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Figure 3a~3c
AI summary
The present invention relates to a driver posture detection apparatus and a driver posture detection method that allow a posture of a driver of a saddle-type vehicle to be detected. A driver posture detection apparatus is provided with: at least two wireless receivers that are attached to a saddle-type vehicle and each include a plurality of antennas; at least one wireless transmitter that is attached to wear of a driver of the saddle-type vehicle; a direction calculation section that calculates, based on phase information on radio waves from the wireless transmitter that are received by the wireless receiver, a direction of the wireless transmitter with respect to the wireless receiver; a position calculation section that calculates, based on direction data calculated by the direction calculation section, a position of the wireless transmitter with respect to the wireless receiver; and a posture calculation section that calculates, based on position data calculated by the position calculation section, a posture of the driver with respect to the saddle-type vehicle.