On the Design of Force Sensors Based on Frustrated Total Internal Reflection

Lavatelli, Alberto; Zanoni, Andrea; Zappa, Emanuele; Cigada, Alfredo

doi:10.1109/tim.2018.2885604

Cited by 7 publications

(5 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The refracted wave can now carry energy, and be detected by an appropriate sensible element. The amount of light refracted is proportional to the contact pressure through the contact area between the two media [ 19 ]. This phenomenon is widely exploited in different technological applications [ 19 , 20 ], such as tire normal contact pressure measurement [ 21 ], beam-splitters, optical waveguide couplers, spectroscopy, laser resonators [ 22 ], optical filter design [ 23 ], optical imaging [ 24 ] and microscopy [ 25 , 26 ].…”

Section: Sensor Designmentioning

confidence: 99%

Frustrated Total Internal Reflection Measurement System for Pilot Inceptor Grip Pressure

Zanoni

Garbo

Masarati

et al. 2023

Sensors

Self Cite

View full text Add to dashboard Cite

Sensing the interaction between the pilot and the control inceptors can provide important information about the pilot’s activity during flight, potentially enabling the objective measurement of the pilot workload, the application of preventive actions against loss of situational awareness, and the identification of the insurgence of adverse couplings with the vehicle dynamics. This work presents an innovative pressure-sensing device developed to be seamlessly integrated into the grips of conventional aircraft control inceptors. The sensor, based on frustrated total internal reflection of light, is composed of low-cost elements and can be easily manufactured to be applicable to different hand pressure ranges. The characteristics of the sensor are first demonstrated in laboratory calibration tests. Subsequently, applications in flight simulator testing are presented, focusing on the objective representation of the pilot’s instantaneous workload.

show abstract

Section: Sensor Designmentioning

confidence: 99%

Frustrated Total Internal Reflection Measurement System for Pilot Inceptor Grip Pressure

Zanoni

Garbo

Masarati

et al. 2023

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

“…A force sensor typically has two critical components, i.e., force-sensitive structure and force detecting element [7]- [9]. The former has a specific stiffness to bear the applied force and the latter is to detect the structural deformation.…”

Section: Introductionmentioning

confidence: 99%

A Variable Configuration Force Sensor With Adjustable Resolution for Robotic Applications

Sun

Chen

Xiong

et al. 2023

IEEE Trans. Ind. Electron.

View full text Add to dashboard Cite

Multitask measurements with different measuring ranges and resolutions have put forward higher requirements for force sensors. This paper presents a novel variable configuration approach to develop an adjustableresolution force sensor with a compact force-sensitive structure. Unlike the traditional strain gauge-based force measurement, the external force is detected through measuring the displacement of the deformed structure with a precision optical linear encoder. This approach can enable variable measuring range and force resolution through the continuous adjustment of structural stiffness. Specifically, the stiffness adjustment is implemented by changing the second moment of area of the sensor structure through rotating its build-in flexure beam shafts. Analytical models are established to provide the theoretical basis for analysis and design of the sensor. Further, the validity of the design is evaluated with finite element simulations. Finally, a sensor prototype is developed for performance evaluation and applied for the wire bond pull tests to evaluate the bond strength on the printed circuit board assembly. Experimental results show that it is effective to change the measuring range and force resolution of the developed force sensor through the stiffness adjustment.

show abstract

“…Most of the related studies have focused on planar structures and pressure measurements. 24,25 Although the curved structures were able to achieve a 360°sensing range, 26,27 they were not sufficiently miniaturized (i.e., millimeter level) for local detection in in vivo environments. In fact, the earliest vision-based tactile sensors were based on the optical waveguide.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Vision-based tactile sensors provide a better solution for measuring the contact force on soft matters, but they have not yet been applied to the measurement of adhesion force. Most of the related studies have focused on planar structures and pressure measurements. , Although the curved structures were able to achieve a 360° sensing range, , they were not sufficiently miniaturized (i.e., millimeter level) for local detection in in vivo environments. In fact, the earliest vision-based tactile sensors were based on the optical waveguide .…”

Section: Introductionmentioning

confidence: 99%

Vision-Based Contact Adhesion Measurement Method on Soft Matter Surfaces

Zhu

et al. 2023

Langmuir

View full text Add to dashboard Cite

Adhesion property measurements contribute to a comprehensive understanding of the mechanical properties of soft matters. Indentation tests are a common method for measuring the adhesion force. However, indenters generally have a large volume and a small sensing angle and, thus, are not conducive to local detection in high-precision environments. Here, we propose a vision-based contact adhesion measurement (VisCAM) method to achieve the contact image and adhesion force on soft matter surfaces from the perspective of indentation direction. The coupling of the 7.6 mm diameter probe and a flexible fiber makes the system similar to a miniaturized endoscope. Classical contact theories and finite element models are used for the contact mechanics analysis of silicone rubber. The image grayscale–load mathematical model is constructed based on the change in contact light spot. Finally, the uncertainty of the system is less than 4%, and the measurement error is 0.04 N. In-vitro kidney indentation experiments showed that the local adhesion force measurement of soft tissues can be completed. Our method provides better solutions for understanding the adhesion properties of soft matters.

show abstract

On the Design of Force Sensors Based on Frustrated Total Internal Reflection

Cited by 7 publications

References 32 publications

Frustrated Total Internal Reflection Measurement System for Pilot Inceptor Grip Pressure

Frustrated Total Internal Reflection Measurement System for Pilot Inceptor Grip Pressure

A Variable Configuration Force Sensor With Adjustable Resolution for Robotic Applications

Vision-Based Contact Adhesion Measurement Method on Soft Matter Surfaces

Contact Info

Product

Resources

About