Abstract:
We present a 10 N nominal needle tip force sensor based on silicon-based semiconductor strain gauges that can be used in brachytherapy or biopsies. As deformation body th...Show MoreMetadata
Abstract:
We present a 10 N nominal needle tip force sensor based on silicon-based semiconductor strain gauges that can be used in brachytherapy or biopsies. As deformation body the guiding rod of such a surgical needle with a diameter of 1.2 mm is used. In a thinned area, near the tip of the needle, the strain gauge, as sensing element, is applied with a flexible PCB for electrical connection. Two needles are built and characterized using a testing machine. The sensors provide sensitivities of 6.1 mV/N and 6.4 mV/N for only 1 mA supply current of the bridge, respectively. The linearity and hysteresis errors are in the range of 0.6 % to 4.4 %, which allows measuring interaction forces at the needle tip. Our results prove that the force sensor will provide new measurement means or applications with haptic feedback or for robotic insertion tools.
Published in: 2019 IEEE SENSORS
Date of Conference: 27-30 October 2019
Date Added to IEEE Xplore: 14 January 2020
ISBN Information: