Journal ArticleDOI
Design and Analysis of an Electro-Optic Type Pressure Transmitter Using Bellows as Primary Sensor
Praveen Maurya,Nirupama Mandal +1 more
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TLDR
In this paper, a combination of a Bellows and a Mach-Zehnder Interferometer (MZI)-based pressure transmitting system has been proposed, which is capable to transmit pressure reading to a remote location using an electro-optic modulation in the MZI.Abstract:
In process industries, an optical transmitting system has a great impact especially for long distance transmission through inflammable and hazardous areas. A combination of bellows and Mach-Zehnder Interferometer (MZI)-based pressure transmitting system has been proposed in this paper. This novel approach is capable to transmit pressure reading to a remote location using an electro-optic modulation in the MZI. The proposed system is the hybrid type and consists of two sections. First part is the electrical type which is responsible for transmission of measured information in an electrical domain (primary) and a second section is designed for transmission of measured information in an optical domain (secondary). Primary part is the combination of bellows, a Hall probe sensor, and a signal conditioning circuit, and the second part consists of the MZI with three electrodes. The pressure is directly applied to the bellows. The magnet is placed at the top of the Bellows and the variation of the magnet positions is sensed by the Hall probe sensor. The response of the Hall probe sensor, in terms of millivolt range, is not capable to perform the electro-optic modulation in the MZI, so it is further amplified by an instrumentation amplifier and a calibrating circuit. The output from the signal conditioning circuit is fed to the MZI so that the intensity of light which is propagating in the MZI is modulated due to the electro-optic effect. Transmission of the optical signal is very much beneficial for the inflammable industry to prevent the sparking like situation. The operation of the system has been explained with the help of derived theoretical equations. The experiment has been done and the performance of the system along with the experimental results is reported in this paper. The proposed system is linear and provides good repeatability with the applied pressure.read more
Citations
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Journal ArticleDOI
A Model-Driven Scheme to Compensate the Strain-Based Non-Intrusive Dynamic Pressure Measurement for Hydraulic Pipe
Wang Zechao,Mingyao Liu,Wang-Ji Yan,Han Song,Zude Zhou,Ka-Veng Yuen,Qin Wei,Shing Shin Cheng +7 more
TL;DR: In this article, a model-driven scheme with dual stages is proposed to compensate the dynamic pressure measurement, which is applied to an industrial hydraulic pipe system, and the experimental results show that the relative error is reduced greatly after the compensation is implemented, demonstrating the validity of the proposed method.
Journal ArticleDOI
A Self-Powered Breath Analyzer Based on PANI/PVDF Piezo-Gas-Sensing Arrays for Potential Diagnostics Application
Yongming Fu,Yongming Fu,Haoxuan He,Tianming Zhao,Yitong Dai,Wuxiao Han,Jie Ma,Lili Xing,Lili Xing,Yan Zhang,Xinyu Xue,Xinyu Xue +11 more
TL;DR: A self-powered breath analyzer based on polyaniline/polyvinylidene fluoride (PANI/PVDF) piezo-gas-sensing arrays has been developed for potential detection of several internal diseases and demonstrates its use as an ethanol analyzer to roughly mimic fatty liver diagnosis.
Journal ArticleDOI
A Differential Hall Effect Based Pressure Sensor
Sankalp Paliwal,Sujan Yenuganti +1 more
TL;DR: In this article, the authors presented the design and simulation of a pressure sensor integrated with two identical hall effect sensors and permanent magnets arranged in a differential configuration for measuring pressure in the range of 0-20 bar.
Journal ArticleDOI
Transfer Matrix Method-based Dynamic Model to Compensate the Pulsating Pressure in Strain-based Nonintrusive Pressure Measurement for the L-shaped Pipe
TL;DR: In this paper , a model-based and easy-to-implement approach to calibrate the dynamic strain-pressure sensitivity coefficient (DSSC) is proposed to compensate the dynamic pressure.
References
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Book
Process/industrial instruments and controls handbook
TL;DR: The "Process Instruments and Controls Handbook" as discussed by the authors has been used by designers, engineers, and technicians for dealing with process design problems commonly encountered in the chemical process industries (CPI) and has been expanded to include detailed coverage of instruments and control devices as they are used in the manufacturing industries.
Journal ArticleDOI
Multiplexed Fiber-Optic Pressure and Temperature Sensor System for Down-Hole Measurement
TL;DR: In this article, a fiber Fabry-Perot (F-P) interferometer and a fiber Bragg grating (FBG) based pressure and temperature multiplexing sensor system is presented.
Journal ArticleDOI
Smooth Contact Capacitive Pressure Sensors in Touch- and Peeling-Mode Operation
Jeahyeong Han,Mark A. Shannon +1 more
TL;DR: In this paper, two different types of electrodes with different cavity shapes have been designed, fabricated, and tested to achieve high-sensitivity at low-pressures, which is difficult to achieve at atmospheric pressure.
Journal ArticleDOI
Soft Fiber Optic Sensors for Precision Measurement of Shear Stress and Pressure
TL;DR: In this paper, a soft fiber optic sensor based on polymer fiber Bragg gratings (PFBGs) for simultaneous measurement of shear and normal stresses is presented, and the measured pressure sensitivity is 0.8 pm/Pa in the range of 2.4 kPa and the shear stress sensitivity is 1.3 pm/PA for a full range of 0.6 kPa.
Journal ArticleDOI
Development of prototype fiber-optic-based Fizeau pressure sensors with temperature compensation and signal recovery by coherence reading
TL;DR: In this article, a range of prototype fiber-optic-based Fizeau interferometric pressure sensors with temperature compensation and signal recovery by dual-wavelength coherence reading have been developed.