Multi-Directional Motion Detecting Antenna for Driver Position Tracking
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Solution Overview
Problem
There is a need for a system to detect a driver's motion to enhance vehicle operability and safety, as drivers may become distracted while controlling audio/video/navigation (AVN) systems, increasing the risk of accidents.
Innovation Solution
A motion detecting apparatus that includes a motion detecting antenna capable of radiating radio waves with different frequencies from various positions and directions, a motion detector to provide detection signals, and a controller to determine the driver's motion based on reflection signals, allowing for the detection of the driver's position and movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single frequency radio wave is radiated by the antenna, then the device complexity is reduced, but the measurement precision of driver position and motion detection is insufficient
Solution Approach 1:
The antenna is divided into multiple radiation elements (first radiation element, second radiation element, third radiation element, fourth radiation element) arranged at different positions and orientations. Each element radiates radio waves in different directions, enabling precise position detection through spatial segmentation of the detection field.
Solution Approach 2:
Different portions of the antenna have different radiation characteristics. The first and second radiation elements are oriented in a first direction while the third and fourth radiation elements are oriented in a second direction perpendicular to the first. This local differentiation of radiation properties enables accurate determination of driver position and motion in multiple directions simultaneously.
2Adaptability or versatility
If radio waves are radiated in a single direction, then the device complexity is reduced, but the adaptability to detect driver motion in multiple directions is limited
Solution Approach 1:
The antenna transitions from single-direction radiation to multi-directional radiation by adding spatial dimensions. The radiation elements are arranged to radiate in both a first direction and a second direction perpendicular to the first direction, creating a three-dimensional detection coverage that adapts to driver motions in various directions.
3Measurement precision
If multiple frequencies are used for detection, then the measurement precision of driver position is improved, but the loss of time for signal processing increases
Solution Approach 1:
The system uses periodic modulation of radio wave frequencies. The controller modulates the frequency of radio waves radiated by different radiation elements according to predetermined patterns. By analyzing the reflected modulated signals, the system can determine driver position and motion states efficiently without requiring continuous full-spectrum scanning, thus reducing signal processing time while maintaining high measurement 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
The system effectively detects the driver's motion and position, enabling the recognition of control commands and reducing the risk of accidents by ensuring the driver's attention is focused on the road.
Implementation Method 1
a motion detecting antenna configured to radiate a plurality of radio waves having different frequencies
Implementation Method 2
receive reflection signals from the motion detecting antenna
Data Source
AI summary
A motion detecting apparatus includes a motion detecting antenna for radiating a plurality of radio waves having different frequencies, a motion detector for providing a plurality of detection signals having different frequencies to the motion detecting antenna and receiving reflection signals from the motion detecting antenna, and a controller for determining a motion of a driver based on the reflection signals received by the motion detector.