Optical Sensor Window Heating for VOC Deposit Control
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Solution Overview
Problem
Optical sensor systems used in image forming apparatuses and air quality monitoring devices face issues with unwanted deposits on window members, which degrade detection signals and lead to incorrect readings of volatile organic compounds (VOC) due to non-uniform thickness causing scattering of infrared light.
Innovation Solution
The optical sensor system includes a source module, first and second detection modules with respective window members, and a heating module that activates to suppress deleterious effects from deposit formations by emitting a detection signal through the window members, using beam splitters and filters to determine VOC presence and deposit formation, and applying correction adjustments to maintain accurate VOC readings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If window members are used in optical sensor systems, then detection signals can be transmitted through protected paths, but unwanted deposits form on the window members causing signal degradation
Solution Approach 1:
The heating module is activated before or during the detection process to prevent deposit formation on the window members. By maintaining elevated temperatures on the window surfaces, volatile organic compounds are prevented from condensing and forming deposits that would scatter the infrared detection signal.
Solution Approach 2:
The patent converts the harmful effect of heating (which could potentially degrade components) into a beneficial effect by using controlled heating specifically on the window members to prevent deposit formation. The heating module targets only the window surfaces, transforming thermal energy from a potential harm into a protective mechanism that maintains optical clarity.
2Measurement precision
If deposits with non-uniform thickness form on window members, then scattering of infrared light occurs, but this leads to incorrect VOC readings
Solution Approach 1:
The system performs preliminary detection of deposit formation on window members before conducting VOC measurements. The optical sensor detects changes in light transmission caused by deposits, and this information is used to correct or adjust subsequent VOC readings, ensuring measurement accuracy even when deposits are present.
Solution Approach 2:
The patent implements a feedback mechanism where the detection module continuously monitors both VOC concentrations and deposit formation on window members. Based on this feedback, the system adjusts its measurements and can trigger cleaning operations when deposit levels interfere with accurate detection, maintaining measurement precision dynamically.
3Reliability
If heating module is activated to suppress deposit formation, then signal integrity is maintained, but energy consumption increases
Solution Approach 1:
The heating module operates periodically rather than continuously, activating only when deposit formation is detected or at scheduled intervals. This periodic heating maintains signal integrity by preventing deposit accumulation during critical detection periods while minimizing energy consumption by keeping the heating element inactive during non-critical periods.
Solution Approach 2:
The heating module applies heat only to the specific window member surfaces where deposit formation occurs, rather than heating the entire optical sensor system. This partial action maintains signal integrity at the critical interfaces while significantly reducing overall energy consumption compared to full-system heating.
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 solution effectively reduces signal distortion caused by deposits, ensuring accurate detection of VOC concentrations and activating corrective actions such as heating to maintain signal integrity and provide reliable VOC readings.
Implementation Method 1
The source module may emit a detection signal such as an infrared signal through the respective window members to be received by a detection module
Implementation Method 2
The objects such as volatile organic compounds (VOC) may be detected when present in a path of the detection signal
Implementation Method 3
a heating module that activates to suppress deleterious effects from deposit formations
Implementation Method 4
using beam splitters and filters to determine VOC presence and deposit formation
Data Source
AI summary
An optical sensor system is disclosed including a source module, a first detection module, and a second detection module. The source module includes a source housing unit having a source window member. The source module may emit a detection signal through the source window member. The first detection module and the second detection module are spaced apart from the source module.