Wearable Motion Sensor Layout for Flat Contact and Stable Signals
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Solution Overview
Problem
Existing wearable sensor devices face challenges in maintaining operational stability and wearing comfort due to the connection between the sensor and external circuits affecting reliability and comfort.
Innovation Solution
A sensor device with a flexible substrate and a first sensing unit that transmits electric signals through a conductive channel to a target position away from the target object, keeping the sensor surface flat and reducing deformation, thereby improving stability and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the sensing unit is directly connected to external circuits on the flexible substrate, then the connection is simplified, but the sensor surface deforms non-uniformly affecting measurement accuracy and wearing comfort
Solution Approach 1:
The flexible substrate is divided into a first region (sensing area) and a second region (connection area), with the sensing unit located in the first region and external circuits in the second region. This spatial segmentation isolates the sensing surface from connection structures, preventing deformation of the sensing area while maintaining simplified connections overall.
Solution Approach 2:
A conductive channel is introduced as an intermediary element to transmit electric signals from the sensing unit to external circuits. This mediator allows the sensing unit to remain isolated on the first region while maintaining electrical connection, thus preventing direct mechanical coupling that would cause non-uniform deformation.
2Measurement precision
If the sensing unit is placed close to the target object for accurate detection, then measurement accuracy improves, but the connection to external circuits affects wearing comfort and reliability
Solution Approach 1:
The flexible substrate is segmented into distinct functional regions: the first region houses the sensing unit close to the target object for accurate detection, while the second region contains external circuits for reliable connections. This spatial separation ensures both measurement accuracy and operational reliability without compromise.
3Ease of operation
If the flexible substrate maintains a flat surface for comfort, then wearing comfort improves, but the connection structures cause non-uniform deformation affecting sensor performance
Solution Approach 1:
Different regions of the flexible substrate are assigned different functional qualities: the first region (sensing area) maintains flatness and flexibility for comfort and accurate sensing, while the second region (connection area) accommodates connection structures. This local differentiation allows the sensor surface to remain flat for comfort while connections are isolated to prevent deformation issues.
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 solution enhances operational stability and wearing comfort by avoiding non-uniform deformations and foreign-body sensations, ensuring accurate motion signal acquisition.
Implementation Method 1
a first sensing unit configured to detect the target object and generate an electric signal
Implementation Method 2
The first conductive channel is configured to transmit the electric signal generated by the first sensing unit to a target position
Data Source
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AI summary
Provided are a sensing apparatus (100) for acquiring a motion signal of a target object, and a wearable device comprising the sensing apparatus (100). The sensing apparatus (100) comprises a first sensitive unit (120) arranged on a first side (110-a) of a flexible substrate (110) facing the target object. By means of a first conductive channel (111) arranged on the flexible substrate (110), an electrical signal generated by the first sensitive unit (120) is conducted to a target position (A), wherein the target position (A) is farther away from the target object than the first side (110-a), such that a connection position between the sensing apparatus (100) and an external circuit can be away from the first side (110-a), allowing the first side (110-a) of the sensing apparatus (100) facing the target object to remain flat, avoiding uneven deformation of the first sensitive unit (120) on the first side (110-a), and thus improving operational stability of the sensing apparatus (100). Moreover, the flatness of the first side (110-a) can also reduce foreign body sensation during the wearing of the sensing apparatus (100) and enhance the wearing comfort of the sensing apparatus (100).