Wearable Sensor Shock Absorber for Stable Bio-Signal Measurement
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Solution Overview
Problem
Existing wearable devices face challenges in stabilizing bio-signal measurement due to motion transmission between the device body and sensor parts, leading to inconsistent skin contact pressure and potential damage to the sensor.
Innovation Solution
Incorporation of a shock absorber between the wearable device main body and sensor part, which reduces motion transmission and allows independent movement, along with a buffer member to adapt to the user's skin curvature, and a friction-reducing elastic member to maintain stable sensor positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the sensor part is rigidly connected to the wearable device main body, then the structural stability is improved, but motion transmission to the sensor causes measurement instability and potential sensor damage
Solution Approach 1:
A shock absorber is introduced as an intermediary component between the wearable device main body and the sensor part. This shock absorber acts as a mediator that decouples the rigid connection, allowing the sensor part to move independently from the main body while maintaining structural integrity. The shock absorber absorbs mechanical shocks and reduces motion transmission, thereby protecting the sensor from movement-induced damage and ensuring stable measurements.
2Reliability
If the sensor part is allowed to move independently from the wearable device main body, then motion transmission is reduced and measurement stability is improved, but the mechanical connection strength deteriorates
Solution Approach 1:
The shock absorber serves as a mediator that maintains a controlled mechanical connection between the main body and sensor part. It provides sufficient connection strength to keep the sensor part secured while simultaneously allowing independent movement to reduce motion transmission. The shock absorber's unique properties enable it to fulfill both connection and isolation functions simultaneously.
Solution Approach 2:
The shock absorber changes the mechanical parameters of the connection system by introducing damping and compliance. It modifies the stiffness and strength characteristics to achieve an optimal balance between connection strength and motion isolation. The shock absorber's material properties and structural design allow it to provide the necessary mechanical strength while enabling relative movement between components.
3Reliability
If a shock absorber is introduced between the main body and sensor part, then motion transmission is reduced and measurement stability is improved, but the device complexity increases
Solution Approach 1:
The shock absorber is designed as a thin, flexible component that can be easily integrated into the existing device structure. It uses flexible materials and thin-film constructions to provide shock absorption and motion isolation without adding significant bulk or complexity. This approach allows the shock absorber to be incorporated with minimal impact on the overall device design and manufacturing.
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
Enhances bio-signal measurement stability by minimizing motion-induced pressure changes and ensuring consistent skin contact, thereby improving measurement accuracy and sensor durability.
Implementation Method 1
a shock absorber that is interposed between the wearable device main body and the sensor part to mechanically connect the wearable device main body and the sensor part, and that is configured to reduce motion transmission between the wearable device main body and the sensor part
Implementation Method 2
an elastic member that is provided between a top surface of the sensor accommodating space and a top surface of the sensor part, and that is configured to permit a vertical position of the sensor part to be maintained in the sensor accommodating space
Implementation Method 3
A surface of the elastic member that contacts the sensor part may be coated to reduce a friction coefficient
Implementation Method 4
a buffer member that is provided between the plate and the sensor, and that is configured to permit a first shape of a skin contact surface of the sensor part to adapt to a second shape of a curved portion of the skin surface of the user
Implementation Method 5
a coil that is configured to receive power via electromagnetic induction from a wearable device
Data Source
AI summary
A wearable device includes a wearable device main body, a sensor part configured to contact a skin surface of a user of the wearable device, and measure a bio-signal of the user, and a shock absorber that is interposed between the wearable device main body and the sensor part to mechanically connect the wearable device main body and the sensor part, and that is configured to reduce motion transmission between the wearable device main body and the sensor part to permit the wearable device main body to move independently from the sensor part.