Biometric Sensor Load Unit for Noise Reduction
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Solution Overview
Problem
Conventional body-attachable-type biometric information measurement apparatuses face challenges in accurately measuring biometric information due to noise generated during sensor deformation or movement, which affects the response signal.
Innovation Solution
The apparatus incorporates a load unit that adds an additional impedance to the sensor impedance, reducing noise levels in the response signal. This additional impedance is greater than the sensor impedance, and it is arranged in series with the bioelectrode or measurement module, or as a connection terminal between the sensor and measurement module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a body-attachable sensor is used for continuous biometric measurement, then continuous monitoring capability is improved, but noise is generated during sensor deformation or movement which degrades measurement accuracy
Solution Approach 1:
A load unit is introduced as an intermediary component between the sensor and the measurement system. This load unit provides additional impedance that acts as a mediator to suppress noise signals generated during sensor movement or deformation, while allowing the useful biometric signal to pass through to the measurement module
Solution Approach 2:
The impedance characteristics of the measurement system are changed by adding a load unit with specific impedance values. The load unit's impedance is designed to be greater than the sensor impedance, creating a parameter change that selectively attenuates noise frequencies while preserving the biometric signal
2Measurement precision
If additional impedance is added through a load unit, then noise level in response signal is reduced, but device complexity increases
Solution Approach 1:
The load unit is merged with existing components in the measurement system. It can be integrated into the connection terminal between sensor and measurement module, or incorporated into the measurement module housing, thereby adding noise suppression functionality without creating a completely separate component
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 effectively reduces noise in the response signal, enabling accurate measurement of biometric information even during sensor deformation or movement. Additionally, a low-frequency band pass filter further removes high-frequency noise components, enhancing measurement accuracy.
Implementation Method 1
a load unit configured to add an additional impedance to a sensor impedance of the sensor to relatively reduce a level of noise applied to the response signal by physical deformation of the sensor
Implementation Method 2
a low-frequency band pass filter configured to filter a high frequency component of the noise from the response signal of which the level of the noise is reduced by the load unit
Data Source
Figure 1
Figure 2~3(b)
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AI summary
The present disclosure relates to a body-attachable apparatus for measuring biometric information and, more particularly, to an apparatus for measuring biometric information, which can accurately measure biometric information by connecting an additional impedance to a sensor to reduce the magnitude of noise generated during deformation or movement of the sensor, and accurately measure the biometric information by removing noise affecting a response signal during the deformation or movement of the sensor, via the additional impedance.