Multifunction Radar Detection System for Vehicle Liftgate
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Solution Overview
Problem
Existing vehicle detection systems for closure panels, such as liftgates, suffer from blindspot coverage zones due to multiple distinct systems for gesture recognition, park assist, and obstacle detection, which are tailored for specific areas and require multiple sensor positions, leading to inefficiencies, especially with powered liftgates where sensor coverage changes with movement.
Innovation Solution
A multifunction radar-based detection system with a microprocessor that determines active modes based on vehicle system controller signals, using a single system with radar sensors on both sides of the closure panel to detect objects and motions, and a lighting assembly integrated with the detection system to provide unobstructed radar beam transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple distinct sensor systems are used for gesture recognition, park assist, and obstacle detection, then each function can be optimized for its specific area of coverage, but the system complexity increases and blindspot coverage zones are created
Solution Approach 1:
The patent combines multiple distinct sensor systems (gesture recognition, park assist, obstacle detection) into a single integrated radar-based detection system. The radar sensor array can perform all three functions simultaneously by processing reflected radar signals in different modes, eliminating the need for separate ultrasonic sensors and their associated control units for each function.
Solution Approach 2:
The radar-based detection system is designed to perform multiple functions universally. The same radar sensor array and processing unit can switch between gesture recognition mode, park assist mode, and obstacle detection mode depending on the operational context, making the system adaptable to various detection needs without requiring function-specific hardware.
2Ease of manufacture
If sensors are fixed to the liftgate for obstacle detection, then the system is simple to implement, but the sensor coverage area changes relative to liftgate movement creating blindspots
Solution Approach 1:
The system dynamically adjusts the radar beam direction and coverage area based on the liftgate's position and movement state. The control unit processes radar signals and can steer the effective detection zones to maintain consistent coverage of critical areas (such as the cargo area and surrounding environment) regardless of whether the liftgate is open, closed, or in transition.
3Reliability
If multiple sensors are positioned on the closure panel for different detection functions, then comprehensive coverage is achieved, but the number of sensors and their placement requirements increase
Solution Approach 1:
The patent merges multiple sensor functions into a single radar sensor array. Instead of using separate ultrasonic sensors for gesture recognition, park assist, and obstacle detection, the system uses one radar array that can perform all three functions by processing reflected radar signals in different operational modes, significantly reducing the total number of sensors required.
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 provides comprehensive coverage without blindspots, enabling safe and reliable operation of the vehicle by integrating multiple detection functions into a single unit, reducing the need for multiple sensors and enhancing obstacle detection and gesture recognition across various vehicle positions.
Implementation Method 1
at least one radar sensor provided in a rear closure panel and at least one additional radar sensor provided in a side closure panel
Data Source
AI summary
A detection system and method of operating the detection system are provided. The system includes a power supply unit and at least one sensor for sensing at least one of an object and a motion. A communication unit is electrically coupled to the power supply unit for communicating with a plurality of vehicle system controllers. A microprocessor is operable in a plurality of modes and electrically coupled to the power supply unit and the at least one sensor and the communication unit. The microprocessor is configured to determine which of the plurality of modes should be active based on communication with the vehicle system controllers and to receive and process the data from the at least one sensor. The microprocessor is also configured to initiate movement of the closure panel in response to processing the data corresponding to the at least one of the object and the motion.