A Sensor System to Assess the Ocular Digital Massage in an Ophthalmic Anaesthesia Training System

Kumar, Nimal J.; George, Boby; Sivaprakasam, Mohanasankar

doi:10.1109/jsen.2019.2932195

Cited by 3 publications

(2 citation statements)

References 21 publications

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“…The practical aspects of the proposed magnetic tactile sensor include the palpation probes and portable pen like devices for tumor stiffness detection and oral cancer screening. The proposed magnetic tactile sensor can be mounted on the needle block devices in ophthalmic anesthesia training models and simulators [30], where the force applied to the eyeball during ocular digital massage needs to be measured. Moreover, the proposed sensor can be integrated with surgical grippers and graspers used in robotic surgical systems and MIRS to assess the applied force and its direction, which can lead to better grasping stability and fewer chances of damage to tissues and organs.…”

Section: Discussionmentioning

confidence: 99%

“…A soft distributed tri-axis force sensors based skin for robotic finger using 3D Hall sensors with a normal and shear input force sensing range of 0-6 N and 0-1 N, respectively, was presented in [29]. Kumar et al [30] proposed a sensor system based on a single axis Hall sensor to assess the applied forces to an eye during ocular digital massage in an ophthalmic anesthesia training model. The sensor was capable of measuring forces up to 30 N in the normal direction, whereas the shear force data was not reported.…”

Section: Introductionmentioning

confidence: 99%

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A Soft Multi-Axis High Force Range Magnetic Tactile Sensor for Force Feedback in Robotic Surgical Systems

Rehan

Saleem

Tiwana

et al. 2022

Sensors

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This paper presents a multi-axis low-cost soft magnetic tactile sensor with a high force range for force feedback in robotic surgical systems. The proposed sensor is designed to fully decouple the output response for normal, shear and angular forces. The proposed sensor is fabricated using rapid prototyping techniques and utilizes Neodymium magnets embedded in an elastomer over Hall sensors such that their displacement produces a voltage change that can be used to calculate the applied force. The initial spacing between the magnets and the Hall sensors is optimized to achieve a large displacement range using finite element method (FEM) simulations. The experimental characterization of the proposed sensor is performed for applied force in normal, shear and 45° angular direction. The force sensitivity of the proposed sensor in normal, shear and angular directions is 16 mV/N, 30 mV/N and 81 mV/N, respectively, with minimum mechanical crosstalk. The force range for the normal, shear and angular direction is obtained as 0–20 N, 0–3.5 N and 0–1.5 N, respectively. The proposed sensor shows a perfectly linear behavior and a low hysteresis error of 8.3%, making it suitable for tactile sensing and biomedical applications. The effect of the material properties of the elastomer on force ranges and sensitivity values of the proposed sensor is also discussed.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%