Mattress Comfort Profiling for In-Line Support Tolerance Testing
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Solution Overview
Problem
Conventional manufacturing methods cannot guarantee that mattresses provide comfort and support characteristics within acceptable tolerances for individual users, and existing firmness testing methods, such as ILD test machines, are inadequate for in-manufacturing-line testing and do not account for the complex firmness profiles of multi-layered sleep support members.
Innovation Solution
A comfort/support analysis system that identifies sleep support members, determines tested comfort/support values, and compares them to predetermined goal values using a comfort/support analysis curve, ensuring each mattress meets specified tolerances through a system integrated into the manufacturing line, which includes a contact surface for applying load and a strain gauge for measuring deflection, and utilizes identifiers for goal specifications and material recovery analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional ILD test machines are used to test mattress firmness, then firmness measurements can be obtained at regular intervals, but the system cannot guarantee that each manufactured mattress meets acceptable tolerances for comfort and support characteristics
Solution Approach 1:
The mattress surface is divided into multiple test locations arranged in a grid pattern, with test points positioned to correspond to different body regions (head, shoulder, hip, leg areas). This segmentation allows comprehensive coverage of the mattress surface and enables identification of localized firmness variations that affect different sleeping positions.
Solution Approach 2:
The testing system transitions from conventional single-point or linear interval measurements to a two-dimensional grid pattern of test locations. This dimensional expansion provides a more complete characterization of the mattress firmness profile across the entire surface, enabling better correlation with actual sleeping comfort and support characteristics.
2Productivity
If conventional ILD test machines are used for batch testing at the design stage, then firmness approximation is achieved, but there is no way to test every mattress produced in the manufacturing line
Solution Approach 1:
The testing system is designed to be self-contained and automated, with the mattress itself serving as the test subject without requiring complex external testing equipment. The system applies load through a platen and measures deflection using sensors integrated into the testing apparatus, enabling rapid automated testing that can be performed on every mattress unit as it passes through the manufacturing line.
Solution Approach 2:
The system varies the test parameters including load magnitude (testing at different compression levels), test location (multiple positions across the mattress surface), and measurement intervals. These parameter variations enable comprehensive characterization of mattress firmness under different conditions while maintaining rapid testing speed suitable for production line integration.
3Ease of manufacture
If conventional ILD test machines measure firmness at a single deflection point, then a firmness value is obtained, but the complex firmness profiles of multi-layered sleep support members cannot be adequately characterized
Solution Approach 1:
The system pre-defines multiple test locations and load levels before testing begins. The test protocol is programmed in advance to apply loads at specified compression levels (e.g., 25 lbs, 50 lbs, 75 lbs) at each grid location, ensuring comprehensive coverage of the mattress firmness characteristics without requiring complex real-time decision-making during testing.
Solution Approach 2:
The system measures deflection at multiple load levels and uses this feedback to calculate firmness values at each test location. The measured deflection data is fed back to the control system, which processes the information to generate a comprehensive firmness profile that characterizes the multi-layered construction of the mattress, including the contributions of different comfort and support layers.
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
Ensures every mattress meets desired comfort and support specifications, providing an objective assessment and preventing defective products from reaching customers, while allowing for customized and accurate evaluation of material recovery characteristics.
Implementation Method 1
a strain gauge for measuring deflection
Data Source
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AI summary
A method of testing a sleep support member, the method including: identifying the sleep support member; determining a tested comfort/support value for the identified sleep support member before the identified sleep support member is provided to a customer; and determining whether the tested comfort/support value is within a predetermined tolerance level of a goal comfort/support value for the identified sleep support member. An apparatus for testing a sleep support member, the apparatus including: an identification unit configured to identify the sleep support member; a comfort/support testing unit configured to determine a tested comfort/support value for the identified sleep support member before the identified sleep support member is provided to a customer; and an analysis unit configured to determine whether the tested comfort/support value is within a predetermined tolerance level of a goal comfort/support value for the identified sleep support member.