find_landmarks_gel_compression: find_landmarks_gel_compression

In tbgitoo/textureAnalyzerGels: Reading and analyzing texture analyzer data

find_landmarks_gel_compression

Description

Finds landmark points in as porous gel compression curve (Force - Distance curve). Currently, detection of the gel touch point in both the "down" and "up" cycle of the chuck is implemented. The analysis is based on the general curve for foams, comprising an initial steep elastic segment, followed by a plateau and then a densification region (Gibson &Ashby, 1997).

Usage

find_landmarks_gel_compression(theData, approximate_gel_touch_point = NULL,gel_thickness=NULL)

Arguments

theData	Force-Distance data, typically from a "down"-"up" cycle of the chuck; the data needs to be smooth and contain already the ForceSlope column, which can be obtained by smooth_texture_analyzer_data
approximate_gel_touch_point	Initial guess of the gel touch point
gel_thickness	Macroscopic gel thickness estimation, can be used to improve initial guess for the densification limit (via find_densification_limit)

Details

The function makes use of find_initial_touch_point for each movement cycle

Value

Vector of estimated touch points, one for the down movement, one for the up movement

Author(s)

Thomas Braschler

References

Gibson, L. J. & Ashby, M. F. Cellular Solids: Structure and properties. (Cambridge University Press, 1997).

See Also

smooth_texture_analyzer_data

And the functions used internally: find_initial_touch_point
find_elastic_limit
find_densification_limit

Examples

data(sampleGelSmooth)
find_landmarks_gel_compression(sampleGelSmooth)

tbgitoo/textureAnalyzerGels documentation built on March 30, 2022, 4:53 a.m.