Moisture Detection Circuit Using Variable Responsiveness for Digital Output
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Solution Overview
Problem
Existing moisture detection techniques in diapers require complex circuits for converting analog data to digital, leading to increased size and production costs, making them inefficient for accurately detecting moisture presence and amount.
Innovation Solution
A circuit with multiple transistors and resistances on a substrate, where each component part responds differently to moisture, outputting binary digital signals to simplify the detection process and eliminate the need for analog-to-digital conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If analog-to-digital conversion circuit is added to enable wireless transmission of moisture detection data, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent extracts only the essential function needed for wireless transmission by using multiple detection parts that directly output digital signals corresponding to moisture levels, eliminating the need for complex analog-to-digital conversion circuits while maintaining measurement precision
Solution Approach 2:
The patent uses multiple detection parts with different responsiveness characteristics to represent different moisture levels, creating a digital code that directly encodes the moisture amount without requiring conversion circuits, thus simplifying the overall device complexity
2Measurement precision
If complex conversion circuit is added to detect moisture amount accurately, then measurement precision is improved, but manufacturing cost increases
Solution Approach 1:
The patent removes the expensive analog-to-digital conversion circuit from the design by using detection parts that naturally output digital signals based on their different responsiveness to moisture, thereby reducing manufacturing costs while maintaining accurate moisture amount detection
Solution Approach 2:
The patent changes the responsiveness parameter of multiple detection parts to different values, allowing them to directly generate distinct digital signals for different moisture levels without requiring complex conversion circuits, thus reducing production cost
3Measurement precision
If multiple detection parts with different responsiveness are used to detect moisture amount, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple detection parts with different responsiveness characteristics into a single integrated detector structure, where each part contributes to the overall digital output that represents moisture level, achieving accurate measurement without increasing overall device complexity
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 accurate detection of moisture presence and amount with a simple and cost-effective configuration, reducing the complexity and size of the detection system.
Implementation Method 1
the amount of moisture is detected by the degree of conduction between electrodes when the electrodes are connected by moisture
Data Source
AI summary
The present invention provides a circuit including a plurality of component parts formed on a substrate and having common functions, wherein the plurality of component parts each includes a detection part which shows responsiveness to moisture; wherein the responsiveness to moisture varies between the plurality of component parts; and wherein the presence or absence of a response to moisture detected by each detection part corresponds to a binary digital signal, and whereby the circuit outputs a sequence of binary digital signals.