Electronic Cleaning Indicator Using Soil-Responsive Sensing
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Solution Overview
Problem
Current cleaning cycle monitoring methods, particularly in wash and disinfection processes, rely on inaccurate visual inspections, which are manual and prone to operator errors, failing to quantify the efficacy effectively.
Innovation Solution
An electronic indicator system comprising a barrier layer with artificial soil and a sensor, where the sensor's electrical characteristics change in response to the volume of artificial soil, allowing for precise measurement of cleaning efficacy using an electrical characteristic reader.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual inspection methods are used to monitor cleaning cycle efficacy, then the process is simple to operate, but the measurement precision and reliability are poor due to operator errors and inability to quantify results
Solution Approach 1:
The patent replaces manual visual inspection with an electronic sensor-based measurement system. The sensor detects electrical characteristics (such as capacitance or impedance) that change in response to soil presence on the indicator, providing objective, quantifiable data instead of subjective visual assessment. This substitution of mechanical/manual inspection with electronic detection resolves the contradiction by delivering high measurement precision through automated electrical property sensing.
Solution Approach 2:
The patent utilizes changes in electrical parameters (capacitance, impedance, or resistance) of the indicator as a function of soil load to create a measurable signal. The indicator's electrical characteristics vary systematically with the amount of soil present, allowing precise quantification of cleaning efficacy. This parameter-based approach transforms the monitoring task from qualitative visual inspection to quantitative electrical measurement, resolving the precision-accuracy contradiction.
2Reliability
If manual visual inspection is used, then the device complexity is low, but the reliability and objectivity of cleaning efficacy assessment deteriorate due to operator errors
Solution Approach 1:
The patent replaces subjective human visual assessment with objective electronic sensor detection. The sensor automatically measures electrical characteristics of the indicator, eliminating operator variability, fatigue, and subjectivity. This mechanical-to-electronic substitution ensures consistent, reliable, and repeatable measurements across different operators and conditions, directly addressing the reliability concern while accepting increased system complexity.
Solution Approach 2:
The patent incorporates a feedback mechanism where the sensor continuously or periodically measures the indicator's electrical properties and provides quantitative information about soil removal efficacy. This automated feedback loop ensures consistent assessment criteria are applied throughout the cleaning process, enhancing reliability by removing human judgment variability and providing objective data for quality control decisions.
3Measurement precision
If electronic sensors and electrical characteristic readers are implemented, then measurement precision and reliability improve, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent employs a multi-functional indicator design where a single component serves multiple purposes: it provides the substrate for soil deposition, contains the sensing elements, and modulates the electrical signal in response to soil presence. The indicator integrates the sensor, dielectric layer, and signal-transducing elements into one manufacturable unit. This universal design approach allows precise measurement functionality to be achieved while simplifying the manufacturing process by reducing the number of separate components that must be assembled.
Solution Approach 2:
The patent uses a nested structure where the sensor elements are embedded within or integrated with the dielectric layer and substrate. The sensing components are contained within the indicator assembly, with the dielectric material serving both as a structural layer and as part of the sensing mechanism. This nested configuration allows multiple functional elements to be combined in a compact, manufacturable form factor, reducing assembly complexity while maintaining precise measurement capabilities.
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 provides a machine-readable, accurate assessment of cleaning efficacy by quantifying the residual artificial soil post-cycle, reducing operator errors and enhancing the reliability of cleaning process evaluation.
Implementation Method 1
the electrical characteristic of the electronic indicator varies in response to a change in the volume of the artificial soil
Implementation Method 2
the sensor is configured to produce a sensor signal associated with an electrical characteristic of the electronic indicator
Implementation Method 3
The barrier layer includes a dielectric material
Data Source
AI summary
An electronic indicator includes artificial soil and sensor. An electrical characteristic of the electronic indicator can vary due to a change in the volume of the artificial soil. In some embodiments, the electrical characteristic of the electronic indicator can be measured by an electrical characteristic reader and used to determine efficacy of a cleaning cycle.