Dielectric Measurement Apparatus with Dual Signal-Line Phase Compensation
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Solution Overview
Problem
Existing methods for measuring biological information, such as blood glucose levels, are invasive and pose a risk of infection or physical burden, necessitating a non-invasive and highly accurate measurement technique.
Innovation Solution
A measurement apparatus utilizing a substrate with a first signal line and a second signal line separated from a ground conductor, oscillating an alternating current signal, and a computation circuit to accurately determine biological information by comparing signals through both lines, minimizing the impact of pressure-induced phase changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single signal line is used for measurement, then the measurement can be performed with simpler structure, but the measurement precision is degraded due to pressure-induced phase changes
Solution Approach 1:
The measurement function is segmented into two separate signal lines: a first signal line that contacts the living body for measurement and a second signal line that does not contact for reference. This segmentation allows the system to separate the measurement function from the reference function, enabling compensation of pressure-induced phase changes by comparing the two lines while maintaining relatively simple individual line structures.
Solution Approach 2:
The second signal line acts as an intermediary reference that does not directly contact the living body but experiences the same pressure environment. By introducing this intermediary reference line, the system can isolate and compensate for pressure-induced phase changes, thereby improving measurement precision without significantly increasing overall device complexity.
2Area of stationary object
If the second signal line is placed close to the first signal line, then the device size is reduced, but the harmful electromagnetic interference increases
Solution Approach 1:
The grounding structure is designed with local quality variations: the ground conductor is positioned closer to the second signal line than to the first signal line. This asymmetric grounding arrangement creates different electromagnetic shielding characteristics for each signal line, reducing crosstalk and interference between them while allowing the lines to remain in close proximity, thus minimizing device size without excessive interference.
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
Enables non-invasive, high-accuracy measurement of blood glucose levels by isolating the influence of pressure-induced phase changes, thereby improving measurement precision.
Implementation Method 1
an oscillation circuit that oscillates an alternating current first signal
Implementation Method 2
a substrate that is a dielectric... a measurement apparatus and dielectric constant measurement apparatus
Data Source
AI summary
A measurement apparatus includes a substrate that is a dielectric, a ground conductor provided on the substrate, a first signal line provided separately from the ground conductor on the substrate and against which a living body is pressed, a second signal line provided on the substrate such that the second signal line is separated from the ground conductor and the first signal line, and the second signal line does not come into contact with the living body when the living body is pressed against the first signal line, an oscillation circuit that oscillates an alternating current first signal, and a computation circuit that acquires biological information according to comparison of a second signal that is the first signal passing through the first signal line and a third signal that is the first signal passing through the second signal line.