Heated Barcode Reader Window for Fog-Free Scanning
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Solution Overview
Problem
Fogging and condensate buildup in barcode readers within automated specimen processing systems due to high heat and humidity affect the accuracy of barcode reading, leading to operational errors.
Innovation Solution
A sealed barcode reader with a heated, optically transparent window featuring an electroconductive layer, powered by a voltage source to maintain a temperature between 30°C and 60°C, preventing fogging and condensate formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a barcode reader is placed in a high heat and humidity environment for automated specimen processing, then productivity is improved, but fogging and condensate buildup occur on the window, degrading measurement precision
Solution Approach 1:
The patent changes the temperature parameter of the window surface by applying heat (maintaining temperature between 30-60°C) to prevent condensation formation. This parameter change directly addresses the fogging issue caused by high humidity environments while maintaining the barcode reader's operational functionality.
Solution Approach 2:
The patent converts the harmful effect of heat (which causes condensation) into a beneficial effect by deliberately heating the window surface. The heat that would normally cause fogging is instead used to maintain the window temperature above the dew point, preventing condensation and ensuring clear optical transmission for barcode reading.
2Reliability
If the window temperature is increased to prevent fogging, then reliability is improved, but energy consumption increases
Solution Approach 1:
The patent applies heating locally only to the window surface area where condensation would form, rather than heating the entire barcode reader housing. This localized approach maintains reliability by preventing fogging on the critical optical surface while minimizing overall energy consumption.
Solution Approach 2:
The patent implements continuous or periodic heating of the window to maintain its temperature above the dew point. This continuous useful action ensures consistent prevention of condensation throughout operation, maintaining reliable barcode reading capability in humid environments.
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 solution ensures accurate barcode reading by maintaining the window temperature, thereby enhancing the operational reliability of the barcode reader in high heat and humidity environments.
Implementation Method 1
an electroconductive layer disposed on a surface of the substrate; (b) a pair of conductors in communication with the electroconductive layer; and (c) a power source in communication with the pair of conductors
Data Source
AI summary
An automated specimen processing system is provided for performing slide processing operations on slides bearing biological samples. In some embodiments, the disclosed specimen processing system includes a barcode reader having a heated window. In some embodiments, the barcode reader having the heated window is configured to read information stored within a label affixed to a slide, whereby the barcode reader may be operated within a hot and/or humid environment. A method for automated processing of slides also is provided, whereby the method utilizes the information retrieved from a label affixed to determine which one or more slide processing operations to perform.