A Simple Loading System Applied for Needle Bending Measurement

The paper presents a simple system for load and deformation measurement of a needle-like tubular structure to simulate mechanical conditions and loads on miniature endoscope during eye surgery operation. The system allows for loading force measurement with a strain gauge load cell, the deformation measurement with an optical triangulation sensor and needle deformation measurement with a remote camera. The paper presents the system structural design, the system calibration and its application for the needle bending test measurement.