ECG Strap Electrostatic Shielding With Conductive Threads
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Static electricity generated from the contact between a heart rate strap and clothing affects the accuracy of electrocardiographic signals by reducing the signal-to-noise ratio.
Innovation Solution
A device with a strap woven from elastic threads and interwoven conductive threads provides electrostatic shielding by dispersing static electricity through the conductive threads, which are located on the outer and inner surfaces of the strap, connecting to the user's body to ground the electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conductive threads are added to provide electrostatic shielding, then signal-to-noise ratio is improved, but device complexity increases
Solution Approach 1:
The patent combines the electrostatic shielding function with the existing strap structure by integrating conductive threads into the fabric weave. The conductive threads are interwoven with elastic threads to form a unified strap that provides both mechanical support and electrostatic shielding, eliminating the need for separate shielding components.
Solution Approach 2:
The strap structure serves multiple functions simultaneously: it provides mechanical support and comfort through elastic threads, while the integrated conductive threads provide electrostatic shielding. The same strap structure that contacts the body for physiological signal collection also serves as the shielding mechanism, making the device more versatile and reducing overall complexity.
2Reliability
If conductive threads are interwoven through the strap, then electrostatic shielding is improved, but manufacturing complexity increases
Solution Approach 1:
The patent changes the material composition parameter of the strap by incorporating conductive threads with specific electrical properties into the fabric weave. The conductive threads have controlled conductivity parameters that enable electrostatic shielding while maintaining flexibility and comfort, allowing the material itself to provide the shielding function.
Solution Approach 2:
The strap is constructed as a composite material system combining elastic threads for mechanical properties and conductive threads for electrical shielding properties. This composite structure integrates multiple material functions into a single fabric, where the elastic threads provide stretch and comfort while the conductive threads provide electrostatic shielding.
3Reliability
If conductive threads are placed on outer surface, then electrostatic shielding is improved, but user comfort may be affected
Solution Approach 1:
The patent applies local quality by positioning conductive threads specifically on the outer surface of the strap where they contact clothing, which is the source of electrostatic interference. The inner surface that contacts the user's skin uses different material properties optimized for comfort and signal collection, while the outer surface has the conductive threads integrated for shielding against external electrostatic fields.
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
Improves the signal-to-noise ratio of electrocardiographic signals by effectively shielding against static interference while maintaining user comfort and elasticity.
Implementation Method 1
a second portion of the one or more conductive threads extends to the inner surface and electrically connects the first portion of the one or more conductive threads to the body of the user to provide electrostatic shielding for the plurality of electrodes
Data Source
AI summary
Provided is a device for monitoring a physiological signal. The device for monitoring the physiological signal includes: a strap configured to be worn on a body of a user, the strap includes an inner surface and an outer surface; a plurality of electrodes arranged on the inner surface of the strap and configured to receive electrical signals from the body of user, at least a portion of the electrode on the strap 331 is located between a first portion of one or more conductive threads and the body of user, and a second portion of the one or more conductive thread extends to the inner surface and electrically connects the first portion of the one or more conductive threads to the body of the user, providing electrostatic shielding for the plurality of electrodes.