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Prototype Probe Determining Waveguidea??Gum Contact for a Robot Surgical System
摘要： A probe for cutting soft gum tissue combines a force sensor and a diode laser. In such operations, contact between the tip of the optical waveguide and the soft gum tissue must first be determined. That permits specification of the cutting trajectory in the robot control system. A probe with a diode laser and single-component force sensor is proposed. The errors regarding contact of the laser’s optical waveguide with the soft gum tissue are analyzed.
关键词： soft gum tissue,medical robots,diode laser,force sensor,dental surgery
更新于2025-09-23 15:21:01
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An apparatus for measuring a material's photomechanical response
摘要： This paper describes a simple and inexpensive apparatus for measuring the light-induced shape change of a material, which can be implemented in a high school or undergraduate laboratory. The key components of the apparatus are a laser pointer to actuate the material, a force sensor from an inexpensive jeweler’s balance to measure the response, an Arduino for data acquisition, and a means for mechanically mounting the setup. The apparatus described here was used by high school students and teachers in a summer program to characterize liquid crystal elastomer samples. The theory of photomechanical response is used to interpret the gathered data, from which material parameters related to this theory are determined.
关键词： photomechanical effect,liquid crystal elastomers,Arduino,laser pointer,force sensor
更新于2025-09-23 15:21:01
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Lithography and Etchinga??Free Microfabrication of Silicon Carbide on Insulator using Direct UV Laser Ablationa??
摘要： This work presents a lithography and etching-free micro fabrication of SiC on insulator-based MEMS devices, employing a direct laser ablation. SiC micro-scale structures can be formed in one-step patterning with a remarkably fast speed, enabling rapid prototyping of a multifunctional SiC platform of temperature sensors, strain sensors, and micro heaters.
关键词： silicon carbide,force sensor,micro-heater,temperature sensor,laser ablation
更新于2025-09-19 17:13:59
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[IEEE 2018 IEEE ISAF-FMA-AMF-AMEC-PFM Joint Conference (IFAAP) - Hiroshima (2018.5.27-2018.6.1)] 2018 IEEE ISAF-FMA-AMF-AMEC-PFM Joint Conference (IFAAP) - Piezoelectric Resonating Force Sensor in the Second Vibration Mode
摘要： A resonating force sensor is studied, which is composed of a metal bridge coated with a piezoelectric ?lm for force detection. It is thought to operate the sensor at the second ?exural vibration mode having one node at the center of the bridge. Resonance frequency and piezoelectric coupling are investigated in the frame of an analytical model, and compared with ?nite element analysis (FEA) in a desired force range. The resonance frequency-force relation derived from the analytical model is close the the FEA result in the force range. The coupling factor-force relation from the analytical model agrees with the one from FEA in the small force region, but it shows lower coupling than the FEA result in the large force region.
关键词： Resonance sensor,Electromechanical coupling,Piezoelectric sensor,Force sensor,Resonance frequency,Second mode
更新于2025-09-04 15:30:14
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Electrochemical etching of lightweight nanotips for high quality-factor quartz tuning fork force sensor: atomic force microscopy applications
摘要： Commercially available quartz tuning forks (QTFs) can be transformed into self-sensing and actuating force sensors by micro-assembling a sharp tip on the apex of a tine. Mass of the tip is critical in determining the quality (Q)-factor of the sensor, therefore, fabrication of the lightweight nanotips is a precondition for high Q-factor QTF sensors. The work reports fabrication of very lightweight tungsten nanotips with a two-step electrochemical etching technique which can be used to develop high Q-factor QTF force sensor. First, a tungsten wire with protective coating at one end (1–2 mm) is etched with a trapezoidal waveform to form a lengthy (～2–5 mm) and slender (diameter ～10–40 μm) micro-needle. In the second step, sharp tip apex is fabricated with a direct current etching. High Q-factor (6600–8000) QTF force sensors have been developed with the fabricated nanotips. Atomic force microscope scanning of nano-grating and a triblock copolymer surface validates the scanning performance of the developed sensors.
关键词： quartz tuning fork,nanotips,atomic force microscopy,force sensor,electrochemical etching
更新于2025-09-04 15:30:14
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Effect of elastomer characteristics on fiber optic force sensing performance in biomedical robotics applications
摘要： Miniaturized and “smart” sensors are required for research in biology, physiology, and biomechanics, and they have extremely important clinical applications for diagnostics and minimally invasive surgery. Fiber optic sensors have been proven to provide advantages compared to conventional sensors and high potential for biomechanical and biomedical applications. They are small, easy to operate, minimally invasive with low risk, more accurate, and inexpensive. This paper reports the design and modeling of a fiber optic force sensor that is capable of measuring compliance for a contact force of up to 1 N. The main objective of this study is to design and model a fiber optic sensor capable of measuring the total force applied on an object. A polydimethylsiloxane (PDMS) elastomer film with a thickness of 1.2 mm is placed between an optical fiber tip and an object, and it is used for measuring the force applied on a rigid element. The compliance of the fiber optic force sensor is measured by recording the response of PDMS elastomer films under different load conditions. We use finite element modeling results as a basis for comparing experimental data. The agreement between theoretical predictions and experimental data is reasonable and within an acceptable range.
关键词： Force sensor,FEM analysis,Optical fiber,Elastomer,MATLAB analysis,LabVIEW,ANSYS simulation,Biomedical robotics
更新于2025-09-04 15:30:14