Electromagnetic Gesture Detection for Vehicle Control
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Solution Overview
Problem
Existing gesture detection systems for vehicle operation require specific devices and direct visual connections, which can be distracting and limited in tight vehicle spaces, and lack robustness in detecting input gestures without visual constraints.
Innovation Solution
A method and system that utilize a user device generating a changing electromagnetic field, where field parameters are detected to determine a radio signature sequence, allowing for gesture recognition without a dedicated device, enabling intuitive and robust gesture-based control within a large detection space, including inside vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If camera systems or ultrasonic sensors are used to track hand position and motion, then gesture detection capability is improved, but device complexity and requirement for direct visual connection increase
Solution Approach 1:
The patent replaces optical/mechanical detection systems (cameras, ultrasonic sensors) with an electromagnetic field-based detection system. The detection unit detects changes in electromagnetic field characteristics caused by the movement of conductive objects, eliminating the need for complex optical tracking while maintaining gesture detection capability.
Solution Approach 2:
The patent introduces electromagnetic field changes as an intermediary between the user's gesture and the detection system. Instead of directly observing the hand or arm movement, the system detects the electromagnetic field disturbances caused by conductive materials (such as metal in implants or prosthetics) moving through the field, providing indirect but effective gesture recognition.
2Reliability
If wearable sensors are equipped on the actuation object to measure motion, then gesture detection reliability is improved, but ease of operation deteriorates due to requiring specific devices
Solution Approach 1:
The patent enables the user's existing conductive objects (such as implants or prosthetics with metallic components) to serve as the detection target themselves. The electromagnetic field detection system automatically detects movements of these objects without requiring any additional sensors or wearable devices on the user's part.
Solution Approach 2:
The detection system is designed to work with any conductive object in the detection space, not requiring specific wearable sensors. This universal approach allows the same system to detect gestures from different users with different types of conductive objects (implants, prosthetics, jewelry), enhancing both reliability and ease of operation.
3Ease of operation
If touchless input devices are used in vehicle operation, then driver safety is improved by reducing distraction, but detection robustness worsens in tight vehicle spaces without direct visual connection
Solution Approach 1:
The patent transitions from optical detection (requiring line-of-sight visual connection) to electromagnetic field detection, adding a new dimensional approach to gesture recognition. The electromagnetic field penetrates through vehicle interior obstacles and does not require direct visual connection, enabling reliable touchless control in the confined vehicle environment.
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 simplified and intuitive gesture-based control of vehicle and external apparatuses without the need for specific devices, allowing for precise position tracking and motion analysis, even in confined spaces, with the ability to differentiate users and adapt to contexts, ensuring reliable input recognition.
Implementation Method 1
at least one moving user device (2) generates a changing electromagnetic field (F)
Implementation Method 2
Using the detection unit (3a, 3b, 3c), at least one field parameter of the electromagnetic field (F) is detected
Data Source
AI summary
System and method for detecting an input for an apparatus inside a vehicle, wherein at least one moving user device generates a changing electromagnetic field. A detection unit detects at least one field parameter of the electromagnetic field, wherein the detected field parameter is a function of the geometric arrangement of the user device relative to the detection unit. A radio signature of the user device is determined based on the detected field parameters, and a signature sequence is determined based on a sequence of time-sequentially determined radio signatures of the user device. The determined signature sequence is then assigned to an input gesture, and whereby, based on the input gesture, a signal is generated and output.