Overlapping TOF Gesture Sensing for Accurate Short-Range Recognition
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Solution Overview
Problem
Existing gesture recognition systems based on optical time-of-flight distance measurement sensors face challenges with complex structures, high costs, and false recognition, particularly in short-distance gesture movement recognition, which often require multiple sensors and can be affected by occlusion or occlusion time recognition.
Innovation Solution
A gesture recognition apparatus utilizing two or more distance sensors arranged in the same plane, with overlapping measurement areas, where a controller acquires and analyzes trajectories from each sensor to recognize gestures based on position relationships and wave trough trajectories, reducing the need for multiple sensors and minimizing false recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple distance sensors are used for gesture recognition, then measurement precision and reliability are improved, but device complexity and cost increase
Solution Approach 1:
The patent divides the measurement space into multiple overlapping measurement areas, each covered by a distance sensor. By segmenting the monitoring space and using the overlapping regions between adjacent measurement areas, the system achieves reliable gesture recognition with fewer sensors, reducing device complexity while maintaining measurement precision.
2Reliability
If multiple distance sensors are deployed to cover all directions, then gesture recognition reliability is improved, but manufacturing cost and system complexity increase
Solution Approach 1:
The patent merges the measurement functions of multiple sensors by arranging them to have overlapping measurement areas. The overlapping regions serve multiple purposes: they provide redundant measurement for reliability and enable determination of gesture direction. This merging approach allows reliable multi-directional gesture recognition without requiring completely independent sensor systems for each direction, thereby simplifying manufacturing.
3Measurement precision
If distance sensors are arranged with overlapping measurement areas, then gesture direction recognition is improved, but sensor spacing requirements increase
Solution Approach 1:
The patent utilizes the spatial dimension created by overlapping measurement areas to encode gesture direction information. By analyzing which overlapping region detects the gesture and the characteristics of the trajectory in that region, the system can identify gesture direction without requiring sensors to be spaced far apart. This dimensional approach to information encoding achieves direction recognition while keeping the sensor array compact.
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
This approach allows for efficient recognition of gestures in two or four directions using fewer sensors, simplifying the system structure, reducing costs, and improving recognition accuracy by analyzing trajectories and position relationships between sensors.
Implementation Method 1
the optical time-of-flight (TOF) distance measurement principle is mainly implemented by continuously sending an optical pulse to a measured target, receiving the optical pulse returned from the measured target by a sensor, and detecting a flight (round trip) time of the optical pulse to obtain a distance to the measured target
Data Source
AI summary
A gesture recognition apparatus, a gesture recognition method, a computer device and a storage medium are disclosed. The gesture recognition apparatus includes a controller, a first distance sensor and a second distance sensor, wherein a first measurement area of the first distance sensor partially overlaps a second measurement area of the second distance sensor; and the controller is configured to recognize a gesture to be measured according to a first trajectory and a second trajectory as well as a position relationship between the first distance sensor and the second distance sensor.