Corpo Nazionale Soccorso Alpino e Speleologico 5 th European Cave Rescue Meeting 2011 Starigrad...

Corpo Nazionale Soccorso Alpino e Speleologico

5th European Cave Rescue Meeting 2011

Starigrad Paklenica, Croatia

15th – 18th September 2011

PRESENTATION OF RESULTS IN TESTING OF EQUIPMENT,

TECHNIQUES AND PROCEDURES OF CAVE RESCUE

CNSAS - Commissione Tecnica Speleologica

C.N.S.A.S. Commissione Tecnica Speleologica Paklenica 16 Sept 2011

The Commissione Tecnica Speleologica is a CNSAS committee intended to work on technical subjects

Members come from almost regions of Italy

Subjects the CTS works on:

•Design of a new stretcher

•Design of an helmet for the casualty

•Real time forces measurement system for rescue maneuver characterization

•Development of a proprietary wired telephone

What is CTS

new stretcher

helmet

rescue maneuver characterization

wired telephone

Subjects


- Single UIAA equipment is provided with its maximum

ratings

- In a rescue system several equipment interact each

other

- The whole system behavior can hardly be predicted

by theoretical thoughts

Rescue maneuver (considerations)


What’s going to happen, anchor by anchor, during the

execution of a rigging maneuver?

o Strength on each equipment changes instantaneously

according to the geometry that changes through the

maneuver

o Some geometries could lead to unexpected loads

What about the residual safety margins?

What’s going to happen if something breaks?

Could some configuration be simplified?

Rescue maneuver testing: why?


An approach


A data measurement and recording tool is proposed

Portable and on-field operable

Simultaneous multiple points acquisition

Real time acquisition and analysis

Post acquisition data processing

Requirements


Portable and on-field operable


Simultaneous multiple points acquisition


The data acquisition system is composed by:

12 strain gauge load cells (0 – 3000 kg)

16 bits USB data acquisition card (National Instruments™ DAQ)

Laptop

Home made software for data recording and post-processing

System description


System description: load cells & DAQ


DAQ BOXDAQ BOX

USBUSB

Operating scheme


One load cell mounted on each relevant point (belays, stretcher, pulleys, …)

All the strengths measured and saved real time

Raw graphics available on the fly

Post-processing and data filtering is allowed trough an home-made software developed by CTS

Finally some graphics are reported for the highlights

The data acquisition process


Load cells positioning


Home-made software


Graphic of loads


The data processing is followed by an in deep analysis:

- Graphics analysis and annotation- Live recorded notes- Discussion

The results of the investigation are described on a structured technical report

Data acquisition results


Three main sections

Introduction: abstract, brief description of the

technique and its variants

Operating scheme: geometrical data (angles,

lengths,..) load cells positions,

Data analysis: graphics explanations

Conclusions and final discussion

Technical report


Graphics analysis and annotation


Technical report


• Characterization of the “standard” rigging

techniques adopted and deployed within the

CNSAS

• Analysis of faults

• Analysis of new techniques (collaboration with

the SNATSS - Caving Rescue Technician

National School)

State of the art



DON’T LET OUR BraIN

DOWNBUT…

FIRST OF ALL…

UPSIDE

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