Bending-based formulation of light intensity modulation for miniaturization of optical tactile sensors

Bandari, Naghmeh; Hooshair, Amir; Packirisamy, Muthukumaran; Dargahi, Javad

doi:10.1364/sensors.2018.sem2e.3

Cited by 7 publications

(6 citation statements)

References 3 publications

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“…Although the majority of the current literature has used a linear uni-or multi-variable regression calibration schema, new non-linear technique is emerging. Some of the recent developments have adopted more complex phenomena or structures such as variable bending radius (VBR) intensity modulation [13], [14] and viscoelastic structures [75] to achieve more precision and less hysteresis. Such phenomena or structures are intrinsically non-linear, thus need non-linear regression models.…”

Section: Discussionmentioning

confidence: 99%

“…12(a) illustrates a schematic of transmission loss due to distance d, between two optical fibers. Equation (14) states the fundamental model relating the coupling efficiency, η (the ratio of the transmitted power to the initial power) to the angular misalignment between the fibers, and the gap length [40].…”

Section: ) Bending Loss Principle When An Optical Fiber Is Bentmentioning

confidence: 99%

“…where A, B, C, and D are intrinsic properties of the fibers, structural design parameters, gap medium between the fibers and the angular misalignment caused by the physical load, respectively. Comparing the output (measured) and input powers (set at the source), the coupling efficiency, η is calculated, and the unknown parameters in (14), are estimated. The second coupling loss principle is the reflective LIM, as shown in Fig.…”

Section: ) Bending Loss Principle When An Optical Fiber Is Bentmentioning

confidence: 99%

“…The downside of LIM-based sensors is that the miniaturization is still a critical issue which limits their scalability. This limitation largely affects the resolution and range of measurement [13], [14].…”

Section: Introductionmentioning

confidence: 99%

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Tactile Sensors for Minimally Invasive Surgery: A Review of the State-of-the-Art, Applications, and Perspectives

2020

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Minimally invasive surgery has been one of the most significant evolutions in medicine. In this approach, the surgeon inserts specially-designed instruments through a small incision on the patient's skin into the body cavities, abdomen, veins or, arteries and performs the surgery on organs. As a major limitation, surgeons lose their natural tactile perception due to indirect touch on the organs. Since the loss of tactile perception compromises the ability of surgeons in tissue distinction and maneuvers, researchers have proposed different tactile sensors. This review is to provide researchers with a literature map for the state-of-the-art of tactile sensors in minimally invasive surgery, e.g. in robotic, laparoscopic, palpation, biopsy, heart ablation, and valvuloplasty. In this regard, the pertinent literature from the year 2000 on sensing principles, design requirements, and specifications were reviewed in this study. The survey showed that size, range, resolution, variation, electrical passivity, and magnetic-resonance-compatibility were the most critical specification to study for tactile sensors. Based on the results, some of the requirements, e.g., magnetic-resonance-compatibility and electrical passivity are of less generality and more applicationdependent; however, size, resolution, and range specifications differ for various applications and are of utmost importance.

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Section: Discussionmentioning

confidence: 99%

Section: ) Bending Loss Principle When An Optical Fiber Is Bentmentioning

confidence: 99%

Section: ) Bending Loss Principle When An Optical Fiber Is Bentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tactile Sensors for Minimally Invasive Surgery: A Review of the State-of-the-Art, Applications, and Perspectives

2020

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“…Using a differential form of Equation ( 1 ), and integration along s , the total bending-based power loss can be obtained. The authors have previously reported the derivation of this principle, variable bending radius (VBR), verification and validation in [ 31 , 33 , 34 ]. Figure 3 b illustrates the variable bending radius principle.…”

Section: Sensor Modelingmentioning

confidence: 99%

Optical Fiber Array Sensor for Force Estimation and Localization in TAVI Procedure: Design, Modeling, Analysis and Validation

Bandari

Dargahi

Packirisamy

2021

Sensors

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Transcatheter aortic valve implantation has shown superior clinical outcomes compared to open aortic valve replacement surgery. The loss of the natural sense of touch, inherited from its minimally invasive nature, could lead to misplacement of the valve in the aortic annulus. In this study, a cylindrical optical fiber sensor is proposed to be integrated with valve delivery catheters. The proposed sensor works based on intensity modulation principle and is capable of measuring and localizing lateral force. The proposed sensor was constituted of an array of optical fibers embedded on a rigid substrate and covered by a flexible shell. The optical fibers were modeled as Euler–Bernoulli beams with both-end fixed boundary conditions. To study the sensing principle, a parametric finite element model of the sensor with lateral point loads was developed and the deflection of the optical fibers, as the determinant of light intensity modulation was analyzed. Moreover, the sensor was fabricated, and a set of experiments were performed to study the performance of the sensor in lateral force measurement and localization. The results showed that the transmitted light intensity decreased up to 24% for an external force of 1 N. Additionally, the results showed the same trend between the simulation predictions and experimental results. The proposed sensor was sensitive to the magnitude and position of the external force which shows its capability for lateral force measurement and localization.

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Miniaturized Optical Force Sensor for Minimally Invasive Surgery With Learning-Based Nonlinear Calibration

2020

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Bending-based formulation of light intensity modulation for miniaturization of optical tactile sensors

Cited by 7 publications

References 3 publications

Tactile Sensors for Minimally Invasive Surgery: A Review of the State-of-the-Art, Applications, and Perspectives

Tactile Sensors for Minimally Invasive Surgery: A Review of the State-of-the-Art, Applications, and Perspectives

Optical Fiber Array Sensor for Force Estimation and Localization in TAVI Procedure: Design, Modeling, Analysis and Validation

Miniaturized Optical Force Sensor for Minimally Invasive Surgery With Learning-Based Nonlinear Calibration

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