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Vol. 156, Issue 9, September 2013, pp. 55-61




Development of a Model Depicting Optimum Performance of Liquid Catheter Sensor for Pressure Measurement

St. Thomas' College of Engineering and Technology, Kolkata-700023, India
Tel.: +919432128293
E-mail: sum_hal@yahoo.co.in


Received: 1 July 2013   /Accepted: 25 August 2013   /Published: 30 September 2013

Digital Sensors and Sensor Sysstems


Abstract: In this paper the author proposed a model that depicts not only the basic features of liquid catheter sensor but also improvement of those features. The optimum performance of the 2nd order liquid catheter sensor system depends on parameters namely natural frequency of oscillation and damping ratio and two basic features namely high frequency response and flat frequency response. As the system dynamics of the liquid catheter sensor is evolved as closed loop transfer function therefore it is very difficult to design this system with help the of root locus method where the open loop gain is varied to estimate the behavior of the closed loop poles of the system. In this paper the author has used a novel approach of basic vector field method for two dimensional linearized systems. The model clearly indicates the optimum performance criterion of the liquid catheter sensor based on the model proposed by the author. The proposed model not only gives the various dynamic features of liquid catheter sensor but also highlights both inertia controlled and thermally controlled vapor bubble dynamics.


Keywords: Liquid catheter, Flat frequency response, Two dimensional vector field, Stable spiral, Inertia controlled bubble dynamics.


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