Blood Detection via Frequency Properties on Fiber Sheet
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Solution Overview
Problem
The existing artificial dialysis blood detection devices have complex structures that make them costly and non-disposable, and there is a need for a system that can distinguish between blood and sweat to prevent erroneous detection during needle removal in artificial dialysis.
Innovation Solution
A detection system comprising a fiber sheet with alternating-current conductive bodies that differentiate between blood and sweat based on frequency properties, allowing for disposable components and accurate fluid identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex multi-layer structure is used to detect blood and distinguish it from sweat, then detection reliability is improved, but manufacturing cost increases and the sensor cannot be made disposable
Solution Approach 1:
The patent replaces the complex mechanical multi-layer sensor structure with an electrical field-based detection system. Two conductive bodies generate an electrical field that interacts with fluids having different dielectric properties, allowing blood and sweat differentiation without complex physical layers. This substitutes mechanical/physical differentiation with electromagnetic field interaction.
Solution Approach 2:
The patent detects fluid types by measuring changes in electrical parameters (capacitance, impedance, or resonance frequency) of the electrical field when different fluids are present. Blood and sweat have different dielectric constants, which cause distinct parameter changes in the electrical field, enabling reliable differentiation through simple electrical measurements rather than complex structural analysis.
2Reliability
If a complex multi-layer structure is used to detect blood and distinguish it from sweat, then detection reliability is improved, but production cost increases
Solution Approach 1:
The patent replaces the complex mechanical multi-layer sensor structure with an electrical field-based detection system. Two conductive bodies generate an electrical field that interacts with fluids having different dielectric properties, allowing blood and sweat differentiation without complex physical layers. This substitutes mechanical/physical differentiation with electromagnetic field interaction.
Solution Approach 2:
The patent detects fluid types by measuring changes in electrical parameters (capacitance, impedance, or resonance frequency) of the electrical field when different fluids are present. Blood and sweat have different dielectric constants, which cause distinct parameter changes in the electrical field, enabling reliable differentiation through simple electrical measurements rather than complex structural analysis.
3Reliability
If a complex multi-layer structure is used to detect blood and distinguish it from sweat, then detection reliability is improved, but the sensor can be made disposable
Solution Approach 1:
The patent replaces the complex mechanical multi-layer sensor structure with an electrical field-based detection system. Two conductive bodies generate an electrical field that interacts with fluids having different dielectric properties, allowing blood and sweat differentiation without complex physical layers. This substitutes mechanical/physical differentiation with electromagnetic field interaction.
Solution Approach 2:
The patent detects fluid types by measuring changes in electrical parameters (capacitance, impedance, or resonance frequency) of the electrical field when different fluids are present. Blood and sweat have different dielectric constants, which cause distinct parameter changes in the electrical field, enabling reliable differentiation through simple electrical measurements rather than complex structural analysis.
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 system effectively detects blood leakage during artificial dialysis by distinguishing it from sweat, reducing erroneous detection and enabling the use of disposable components, thus improving safety and reducing production costs.
Implementation Method 1
the type of adhered fluid is determined by a frequency property when each of an alternating-current signal in a first frequency and an alternating-current signal in a second frequency is input to the at least two conductive bodies
Implementation Method 2
A detection system comprising a fiber sheet with alternating-current conductive bodies that differentiate between blood and sweat based on frequency properties
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A detection device includes: a frequency property acquisition unit that acquires a frequency property when an alternating-current signal is input to at least two conductive bodies provided on a fiber sheet; and a detection signal output unit that outputs a detection signal when the frequency property acquisition unit acquires a predetermined frequency property.