Measurement Device Noise Removal via Impedance Element
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Solution Overview
Problem
Existing biosignal measurement devices face challenges in accurately measuring electrocardiographic signals during daily activities due to noise interference from electromyographic, body surface potential, and internal potential signals, and require separate signal processing circuits, increasing device size and cost.
Innovation Solution
A measurement device with a first and second electrode, a ground electrode between them, a differential circuit, an output circuit, and an impedance element that consumes noise signals, allowing accurate noise removal without additional signal processing circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate signal processing circuit is provided to remove noise signals, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent extracts and removes noise signals (electromyographic signals, body surface potential signals, and internal potential signals) from the measured electrocardiographic signal through signal processing, achieving accurate noise removal without requiring complex additional hardware circuits
Solution Approach 2:
The patent achieves multi-functionality by implementing noise removal capabilities within the existing measurement device architecture, allowing the device to both measure electrocardiographic signals and remove noise signals without requiring separate dedicated signal processing circuits
2Device complexity
If a ground electrode is attached to the ankle, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent applies local quality by strategically positioning the ground electrode between the first and second electrodes in the measurement area, optimizing its location to effectively remove noise signals while maintaining measurement precision during daily activities
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 device effectively removes noise signals, improving measurement accuracy and reducing device size and cost by integrating noise removal within the device's configuration.
Implementation Method 1
an impedance element including a first end connected to each of the ground terminal and the common terminal, and a second end connected to the reference terminal
Data Source
AI summary
A measurement device includes: a first electrode; a second electrode; a ground electrode disposed between the first electrode and the second electrode; a differential circuit configured to generate a differential voltage between a first voltage input from the first electrode and a second voltage input from the second electrode; a ground terminal connected to each of the ground electrode, the differential circuit, and an output circuit; the output circuit including an input terminal to which the differential voltage is input, a reference terminal to which a reference voltage is input, and a common terminal, the output circuit being configured to generate a measurement signal based on the differential voltage and the reference voltage, and to output the generated measurement signal; and an impedance element including a first end connected to each of the ground terminal and the common terminal, and a second end connected to the reference terminal.