Measuring Scale Floating Mount via Viscous Liquid Layer
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Solution Overview
Problem
Existing position measurement systems face challenges in maintaining a drift-free and temperature-stable attachment of a measuring standard to a carrier, which affects the accuracy and reproducibility of position measurements due to mechanical stresses and limited support within the measuring range.
Innovation Solution
A floating mount arrangement using spacers embedded in a viscous liquid layer that adheres the measuring standard to the carrier, allowing independent movement and compensating for thermal expansion, with spacers made of materials like glass or ceramic to minimize friction and ensure precise holding forces, ensuring the measuring standard is supported within the measurement range without mechanical interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the measuring standard is rigidly attached to the carrier, then the attachment is stable, but thermal expansion differences cause mechanical stresses that affect measurement accuracy
Solution Approach 1:
A viscous liquid layer is introduced as an intermediary between the measuring standard and the carrier. This liquid layer allows relative movement between the two components due to thermal expansion while maintaining adhesive connection, thereby eliminating mechanical stresses that would otherwise compromise measurement accuracy.
Solution Approach 2:
The patent changes the physical state of the attachment medium from solid (rigid) to viscous liquid. This parameter change allows the attachment to accommodate thermal expansion differences through the viscous flow properties of the liquid, preventing stress buildup while maintaining reliable attachment.
2Ease of manufacture
If the measuring standard is supported only at the edges, then attachment is simple, but there is no level support within the measuring range causing drift
Solution Approach 1:
The support function is segmented and distributed across multiple spacers positioned at different locations between the measuring standard and carrier. These spacers provide distributed support throughout the measuring range, ensuring level support and preventing drift while maintaining manufacturing simplicity.
Solution Approach 2:
The support system transitions from edge-only support (one-dimensional contact) to distributed support across the measuring range (two-dimensional distribution). Multiple spacers are positioned at different x and y coordinates, providing comprehensive support within the measurement area.
3Device complexity
If spacers are made of solid materials with high friction, then the structure is simple, but friction causes mechanical interference affecting measurement precision
Solution Approach 1:
The spacers are transformed into spherical elements that roll within the viscous liquid layer, utilizing hydrodynamic principles. This converts high-friction sliding contact into low-friction rolling motion, eliminating mechanical interference while maintaining structural simplicity.
Solution Approach 2:
The spacers are given spherical geometry instead of flat or irregular shapes. This spherical form enables rolling motion within the viscous liquid, significantly reducing friction and mechanical interference compared to conventional solid spacer designs.
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 a stable and accurate position measurement by decoupling the measuring standard from the carrier, reducing mechanical stresses and maintaining measurement accuracy across temperature changes, ensuring reproducibility and precision in position measurements.
Implementation Method 1
a layer (5) of viscous liquid which adhesively holds the material measure (1) on the carrier (3)
Implementation Method 2
the spacers (4) are held in the gap between the scale (1) and the carrier (3) by the capillary effect in the gap
Data Source
AI summary
PROBLEM TO BE SOLVED: To provide an apparatus with a measurement scale fixed to a carrier, where the measurement scale is kept as drift-free and temperature-stable as possible in its position thereby allowing reproducible position measurement.SOLUTION: An apparatus has a measurement scale 1 fixed to a carrier 3, where the measurement scale 1 comprises a measuring graduation 11 and is supported on the carrier 3 via spacers 4. Between the measurement scale 1 and the carrier 3 a layer 5 is arranged which holds the measurement scale 1 to adhere to the carrier 3, and the spacers 4 are movably embedded in this layer 5.SELECTED DRAWING: Figure 1