Test Strip Positioning Check Using Optical Reflectance
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Solution Overview
Problem
Diagnostic testing devices often suffer from user errors, particularly in the proper insertion of test strips, which can lead to inaccurate results due to the lack of precision and control checks.
Innovation Solution
A system and method utilizing a meter with color detection capabilities, including first and second light sources, to determine the proper positioning of a test strip by measuring reflectance values and displaying messages to guide the user, ensuring correct alignment and type matching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no positioning check is performed, then the device is simple to operate, but user errors in test strip insertion increase
Solution Approach 1:
The system performs preliminary checks before the actual diagnostic test by first measuring reflectance to detect test strip insertion, then measuring color to verify correct positioning and type matching. This preliminary action prevents user errors from affecting test results while adding minimal complexity to the overall device operation.
Solution Approach 2:
The patent replaces mechanical positioning checks with optical measurement methods. Instead of using mechanical sensors or physical alignment mechanisms, the system uses reflectance measurement and color detection to verify test strip positioning and type matching, simplifying the device structure while maintaining reliability.
2Measurement precision
If multiple reflectance measurements are performed, then positioning accuracy is improved, but measurement time increases
Solution Approach 1:
The system performs multiple reflectance measurements quickly as preliminary checks before the diagnostic test begins. By completing these measurements in advance, the system ensures precise positioning detection without adding significant time to the overall test procedure, as the measurements are integrated into the initial setup phase.
Solution Approach 2:
The patent implements continuous reflectance measurement during the test strip insertion and positioning phase. The system continuously monitors reflectance values to detect when the test strip is properly positioned, eliminating gaps in measurement and ensuring precise detection without unnecessary delays.
3Reliability
If color detection is used to verify strip type, then error reduction is improved, but device complexity increases
Solution Approach 1:
The system uses the same optical detection infrastructure for multiple purposes: reflectance measurement for insertion detection, color measurement for type verification, and the same hardware components serve both functions. This multi-functionality reduces the need for separate dedicated systems while maintaining high reliability in test strip type identification.
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
This approach significantly reduces user errors by ensuring the test strip is correctly inserted and the correct type is used, thereby improving the accuracy and reliability of diagnostic testing results.
Implementation Method 1
The meter is configured to illuminate the first light source; detect a first reflectance with the meter through the first read window
Data Source
AI summary
In one embodiment, a system for determining the proper positioning of a test strip includes a test strip having a first reading window and a strip holder. The system further includes a meter, the meter receiving and configured to receive the test strip, the meter having a first light source of a first color and a second light source of a second color and a first read window. The meter is configured to illuminate the first light source; detect a first reflectance with the meter through the first read window; and determine if the first reflectance is greater than a no-strip value.