Radar Gesture Control for Power Liftgate Position Adjustment
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Solution Overview
Problem
Existing power actuated movable panels in vehicles face challenges such as difficulty in hands-free operation, potential injury from sudden opening, and inaccessibility for individuals with limited mobility or disabilities, particularly when hands are full or traditional controls are out of reach.
Innovation Solution
A system utilizing radar-based sensors to detect operator characteristics, including height and gestures, to adjust the position of power actuated panels, allowing for hands-free operation and customizable control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a kick sensor under the rear bumper is used for hands-free operation, then the operator can open the panel without touching controls, but the operator must balance on one foot which may cause loss of balance especially when carrying packages
Solution Approach 1:
The patent replaces the mechanical foot-kick sensing system with a radar-based gesture recognition system. The radar sensor detects hand waves or arm movements to trigger panel opening, eliminating the need for the operator to kick with one foot while carrying packages. This substitution maintains hands-free operation convenience while improving operational reliability.
2Ease of operation
If the movable panel opens to the fully open position, then maximum access is provided, but the panel may strike the operator causing potential injury
Solution Approach 1:
The radar system performs preliminary detection of the operator's presence and position before the panel reaches the fully open position. By detecting the operator in advance, the system can control the panel to stop at a safe distance, preventing impact injury while still providing adequate access to the cargo area.
Solution Approach 2:
The radar sensor continuously monitors the operator's position during panel opening and provides feedback to the control system. This real-time feedback enables dynamic adjustment of the panel's movement to maintain a safe distance from the operator, eliminating the harmful impact risk while preserving full access capability.
3Adaptability or versatility
If the switch is located on the bottom of the panel, then closing control is integrated, but shorter persons or persons with mobility restrictions cannot reach the switch when the panel is fully open
Solution Approach 1:
The patent replaces the mechanical switch located at the bottom of the panel with a radar-based gesture control system. Operators can initiate panel closing by performing a hand wave or arm movement detected by the radar sensor, eliminating the need to physically reach the bottom-mounted switch. This maintains control integration while dramatically improving accessibility for all users.
4Device complexity
If traditional buttons or switches are used for panel control, then simple control mechanism is provided, but operators with hands full cannot access the controls
Solution Approach 1:
The patent substitutes mechanical buttons and switches with a radar-based gesture recognition system. The radar sensor detects hand waves or arm movements to control panel opening and closing, completely eliminating the need for physical contact with controls. This maintains operational simplicity while enabling hands-free operation for carriers.
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 accessibility and safety by enabling intuitive, hands-free control of vehicle panels based on operator characteristics, catering to diverse abilities and preventing collisions through obstruction detection.
Implementation Method 1
A system utilizing radar-based sensors to detect operator characteristics, including height and gestures
Data Source
AI summary
A system and method include a radar sensor disposed in a vehicle for detecting an operator motion or gesture that indicates a desire to perform a function of the vehicle, and a controller in communication with the radar sensor to interpret sensor data and determine if the operator performed a predetermined motion or gesture that indicates the desire to perform the function of the vehicle based on the predetermined motion or gesture.