International PIARC Experiment to Compare and Harmonise Texture and Skid Resistance Measurements (VSS1992/005)
Overview
Background & policy context:
With regard to update the current Swiss standards, the IVT participates at the international PIARC experiment to compare and harmonise texture and skid resistance measurements. Those measurements took place in 1992. The IVT used three devices: a pendulum tester, a skiddometer and a "Stuttgarter Reibungsmesser" (SRM).
The overall object of the experiment is to develop a formula for converting results produced by the different devices to an international friction rating and thus provide a basis for international standardisation.
Objectives:
The objective of the project is to determine the significance of different measurement methods, to calibrate and to standardise the measurements with regard to the revision of the standard grip.
Methodology:
Following methodology will be used in the project:
1. Formulation of the objectives
The experiment was designed, among other things with the intention to determine the repeatability of friction and texture measurements for each participating device. In addition, a database should be created, which allows to develop and evaluate the relationships between the various devices.
2. Repeatibility of measurement
Each participant in this experiment was instructed repeated measurements for each section perform. Wherever possible, this has been handled so well. The cooperation in this regard as a result worked out great and now allows the database a precise determination of the repetition accuracy of the measuring instruments. The concept of the experiment was based on the need for a wide range of values for factors that could influence the accuracy of measurement.
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