6 research outputs found

    Identification of temperature profile and heat transfer on a dielectric membrane for gas sensors by `COSMOS' program simulation

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    The application of commercial 3-D software `COSMOS' for the design and thermal analysis of the low power consumption test structures with dielectric membrane for gas microsensors is presented. Within this work, the simulation provides the estimation of the temperature profile on the active area and the whole membrane including the four bridges and the heating efficiency in the temperature range 20-500 掳C. Unravelling of the heat loss mechanisms in terms of radiation, convection, conduction by air and solid materials during heat transfer on the dielectric membrane is reported for the first time as a mean to evaluate by 3-D simulation the contribution of technological processes and lay-out design to the total heat losses

    State-of-the-art in Micro-Hotplates

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    Force feedback control system dedicated for Robin Heart Pelikan

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    Przedmiotem niniejszej pracy jest badanie system贸w sterowania robota Robin Heart PVA (ang. Port Vision Able) z zastosowaniem specjalnych mikroczujnik贸w si艂y 3D MEMS. Postawiono trzy r贸偶ne sposoby wykorzystania opracowywanych czujnik贸w: (1) jako czujnik si艂y wykorzystany jako mikrod偶ojstik zintegrowany w r臋koje艣ci膮 narz臋dzia endoskopowego, aby 艂atwo kontrolowa膰 ruch robota wizyjnego podczas pracy chirurga; (2) jako czujnik si艂y wewn膮trz szcz臋ki narz臋dzia endoskopowego dla dostarczenia informacji zwrotnej do operatora-chirurga, mierz膮c si艂臋 chwytu; (3) jako czujnik wielowymiarowy dotyku na ko艅cu narz臋dzia chirurgicznego, co u艂atwia badanie palpacyjne do diagnostyki tkanek podczas pracy. Artyku艂 ten jest studium wykonalno艣ci w zakresie proponowanych zastosowa艅. Model sterowania robota przy u偶yciu prototypowego czujnika si艂y 3D zosta艂 pomy艣lnie przetestowany w badaniach funkcjonalnych robota. Wst臋pne badania sensor贸w wykaza艂y ich przydatno艣膰 dla sterowania robotem ze sprz臋偶eniem si艂owym, aby oceni膰 stan tkanek oraz do oceny si艂y docisku chirurgicznego chwytaka.The aim of this work is to investigate the control systems of Robin Heart PVA (Port Vision Able) using special 3D MEMS force microsensors. Three different functions are targeted: (1) micro-joystick actuator to be integrated in the hilt of the laparoscope to easily control robotic movement during operation; (2) force sensor inside the laparoscopic jaw to provide feedback to the surgeon by measuring the grasping strength; (3) 3D force/tactile sensor which facilitates palpation for tissue diagnostics during operation. This paper is a feasibility study regarding these proposed applications. A model of the robot controller using a prototype 3D sensor force has been successfully tested during the study of functional robot. Pre-studies of prototype sensors have demonstrated their usefulness in robot force feedback system to assess the state of tissue and to assess the clamping force the grasper surgical system

    Characterization of an Integrable Single-Crystalline 3-D Tactile Sensor

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