Biomass Impact Sensor Stiffness Gradient Encasement
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Solution Overview
Problem
Existing biomass impact sensors face challenges in achieving accurate and durable measurements in harsh environments due to complexity and cost constraints, particularly in detecting biomass quantity and grain yield in harvesters.
Innovation Solution
The development of biomass impact sensors that sandwich a pressure-sensitive film between two encasement layers with different stiffnesses, where the stiffer front layer transmits forces and the less stiff rear layer absorbs impacts, ensuring the film's secure containment and protection within a conformal encasement, facilitating enhanced sensing performance and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a pressure sensitive film is used to detect biomass impact, then measurement precision is improved, but the film is vulnerable to damage from harsh environments and impact forces
Solution Approach 1:
The patent applies composite materials by combining the pressure-sensitive film with multiple encasement layers having different stiffness properties. The front encasement layer (higher stiffness) transmits impact forces effectively to the film, while the rear encasement layer (lower stiffness) absorbs excess forces to protect the film from damage. This composite structure resolves the contradiction by maintaining measurement precision while enhancing reliability through material composition.
Solution Approach 2:
The patent implements beforehand cushioning by positioning the less stiff rear encasement layer behind the pressure-sensitive film to absorb impact forces after detection. This pre-positioned protective layer prevents the film from shattering or cracking under excessive forces, thereby maintaining reliability without compromising the measurement precision of the film itself.
2Reliability
If the encasement is made stiffer to protect the film, then reliability is improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The patent applies segmentation by dividing the encasement structure into multiple distinct layers with different stiffness properties rather than using a single uniform structure. The front encasement layer provides structural protection with higher stiffness, while the rear encasement layer provides force absorption with lower stiffness. This segmented approach achieves reliable protection while maintaining manufacturing simplicity through modular layer construction.
3Device complexity
If a single uniform encasement structure is used, then device complexity is reduced, but sensing performance and force transmission are compromised
Solution Approach 1:
The patent applies local quality by assigning different stiffness properties to different regions of the encasement structure. The front encasement layer (proximate the sensing face) has higher stiffness to effectively transmit impact forces to the pressure-sensitive film, while the rear encasement layer (proximate the opposite face) has lower stiffness to absorb excess forces. This localized differentiation of material properties optimizes both force transmission for measurement precision and protection for reliability, without significantly increasing overall device 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 design enhances the accuracy and durability of biomass impact sensors, allowing them to operate effectively in rough and dirty environments, such as harvesters, while simplifying manufacturing and reducing costs.
Implementation Method 1
sandwich a pressure sensitive film or layer between two other portions of an encasement
Data Source
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AI summary
A biomass impact sensor (20) for sensing impacts of biomass material may include a pressure sensitive film (24) having a first sensing face (26) and a second opposite face (27), a first layer (28) of a first material composition directly abutting the first sensing face having a first stiffness, and a second layer (32) of a second material composition directly abutting the second opposite face. The first layer and the second layer may be joined along opposite edges of the pressure sensitive film to envelope the sensing material layer on the opposite edges.