Forearm Wearable EMF Sensing Blocks for Precise Gesture Capture
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Solution Overview
Problem
Existing wearable devices rely on visual technology for gesture recognition, which may not be as accurate or natural as sensing user movements directly.
Innovation Solution
A wearable device with sensing blocks that include an induced electromotive force sensing module, comprising a magnetic body, a coil, and an induced electromotive force sensor, which generates data values reflecting the user's hand and arm movements, and a control unit that maps these data values to reflect the movements in an external electronic device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual technology (camera-based image recognition) is used for gesture recognition, then the device can recognize user movements, but the accuracy and naturalness of movement sensing is insufficient
Solution Approach 1:
The patent replaces visual technology (optical system) with a magnetic sensing system. The coil and magnetic body form an electromagnetic sensing mechanism that directly detects physical movement through induced electromotive force, eliminating the need for camera-based visual recognition and providing more accurate and natural movement detection.
Solution Approach 2:
The patent changes the detection parameter from visual image data to electrical parameter (induced electromotive force). By sensing the electrical signal generated by magnetic body movement relative to the coil, the system achieves higher precision in measuring hand and arm movements compared to visual technology.
2Measurement precision
If a coil and magnetic body structure is used to sense induced electromotive force, then detailed hand and arm movements can be detected accurately, but the device complexity increases
Solution Approach 1:
The sensing system is divided into discrete sensing blocks, each containing a coil and magnetic body. This segmentation allows the complex sensing function to be distributed across multiple independent modules, making the overall system more manageable and easier to integrate into the wearable device structure.
Solution Approach 2:
The sensing block with coil and magnetic body is designed as a universal module that can detect various types of movements (hand, wrist, arm) using the same fundamental principle. This multi-functional design reduces overall device complexity by using a standardized sensing unit rather than requiring different sensing mechanisms for different body parts.
3Adaptability or versatility
If sensing blocks are connected with connection members to form a wearable device, then the device can be worn on the forearm, but the overall device structure becomes more complex
Solution Approach 1:
Multiple sensing blocks are merged into a single wearable device structure through connection members. The sensing blocks, upper members, lower members, and connection members are combined to form an integrated bracelet-like structure that can be worn on the forearm, reducing the number of separate components while maintaining sensing functionality.
Solution Approach 2:
The connection members and members are designed with flexible properties to accommodate the contours of the forearm. This flexibility allows the device to conform to the user's body shape without requiring complex rigid structures, simplifying the overall design while ensuring proper wearability and sensor contact.
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 accurate and natural reflection of detailed hand and arm movements from the wrist to the hand in an external electronic device, enhancing user interaction and experience.
Implementation Method 1
an induced electromotive force sensor sensing an induced electromotive force generated in the coil by the coil and the magnetic body
Data Source
AI summary
A wearable device includes sensing blocks, and a connection member connecting the sensing blocks, the sensing blocks include a first sensing block and a second sensing block connected to the first sensing block by the connection member, and the first sensing block includes an induced electromotive force sensing module, the induced electromotive force sensing module includes a magnetic body, a coil not contacting the magnetic body and facing the magnetic body, a rod attached to the magnetic body and guiding a movement path of the coil, and an induced electromotive force sensor sensing an induced electromotive force generated in the coil by the coil and the magnetic body.