Sensor Window Compression Sealing for Agricultural Sensors
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Solution Overview
Problem
Existing optical sensor arrangements for agricultural material evaluation face challenges with window fixation methods, including limited durability under environmental influences, inconsistent sealing, and risk of damage during maintenance due to adhesive or friction-locked connections.
Innovation Solution
A sensor arrangement with a form-fitting compression member that securely fastens the window against a flexible seal element, ensuring reproducible sealing and easy maintenance, using a removable compression member that can be pretensioned by a temporary tool to prevent excessive force on the window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive or friction-locked connections are used to fix the window, then the window can be securely attached to the housing, but the durability is limited under environmental influences and the risk of damage during maintenance increases
Solution Approach 1:
The fixation system is segmented into multiple independent components: a compression member (separate from the window), a flexible seal element, and a form-fitting connection structure. This segmentation allows each component to perform its specific function optimally - the compression member provides adjustable securing force, the seal element ensures weatherproofing, and the form-fitting connection enables easy assembly/disassembly without damage.
Solution Approach 2:
The fixation system transitions from static adhesive bonds to a dynamic mechanical connection using a removable compression member. This allows the system to adapt to environmental conditions and maintenance needs - the compression member can be tightened or removed as required, providing both secure fixation during operation and easy access during maintenance.
2Ease of manufacture
If adhesive or friction-locked connections are used to fix the window, then the window can be attached to the housing, but inconsistent sealing occurs
Solution Approach 1:
A flexible seal element (such as a rubber or elastomeric ring) is introduced between the window and housing. This flexible component compensates for manufacturing tolerances and surface irregularities, ensuring consistent sealing regardless of minor variations in assembly. The flexibility allows the seal to conform to the mating surfaces, eliminating gaps and ensuring weatherproofing.
Solution Approach 2:
The sealing mechanism changes from relying on precise rigid alignment to utilizing material property changes - specifically, the elastic deformation of the flexible seal element under compression. This parameter change from positional precision to material compliance ensures consistent sealing performance.
3Strength
If adhesive or friction-locked connections are used to fix the window, then the window can be attached to the housing, but easy removal and replacement during maintenance becomes difficult
Solution Approach 1:
The compression member is designed with a threaded or bayonet connection that allows preliminary engagement followed by simple rotational tightening. During maintenance, the reverse operation (loosening and removal) is equally simple. This preliminary action design ensures secure fixation during operation while enabling easy removal when needed, without requiring special tools or techniques.
Solution Approach 2:
The fixation system uses a dynamic mechanical connection (threaded or bayonet) rather than static adhesive bonds. This allows the window to be securely attached during operation but easily removed during maintenance by simply reversing the engagement action, providing both security and serviceability.
4Manufacturing precision
If a compression member is used to press the window against the seal element, then reliable and reproducible sealing is achieved, but the complexity of the fixation system increases
Solution Approach 1:
The compression member serves multiple functions simultaneously: it applies compression force to ensure sealing, positions the window correctly, and provides a removable fixation mechanism. This multi-functionality reduces the need for separate components for each function, thereby limiting the increase in overall system complexity despite the added sealing capability.
Solution Approach 2:
The compression member, seal element, and window retention function are merged into a single integrated fixation assembly. This consolidation ensures that the compression force for sealing is automatically applied whenever the window is installed, without requiring separate adjustment mechanisms, thus achieving reproducible sealing with minimal added 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
This solution provides reliable and reproducible sealing, enhances the durability of the window fixation, and simplifies maintenance by allowing for easy removal and replacement of components, reducing the risk of damage during use and repair.
Implementation Method 1
a compression member proximate at least one of the opening, the housing, the window and the seal element, the compression member configured to press the window against the seal element to seal off the housing
Implementation Method 2
a flexible seal element disposed between the window and the housing
Implementation Method 3
a window transparent to electromagnetic waves... through which electromagnetic waves... can pass from the sample to be studied... into the interior of the housing
Data Source
AI summary
A sensor arrangement for evaluating agricultural material, the arrangement comprising: a housing having an opening, the opening configured with a window transparent to electromagnetic waves; a detector arranged in the housing for detecting electromagnetic waves coming in through the window; a flexible seal element disposed between the window and the housing; and a compression member proximate at least one of the opening, the housing, the window and the seal element, the compression member configured to press the window against the seal element to seal off the housing.