A Remote Query Pressure Sensor Based on Magnetic Higher Order Harmonic Fields

Pereles, Brandon D.; Shao, Ranyuan; E, Tan; Ong, Keat Ghee

doi:10.1109/jsen.2008.2006262

Cited by 15 publications

(10 citation statements)

References 26 publications

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“…If the detector needs a big size, we can calculate another group of parameters, including the radius and the turns of receiving coils, based on this model easily. Many sensors based on electromagnetic induction, including current sensor (Chen et al, 2012) and pressure sensor (Pereles et al, 2008), can develop the sensitivity of the probe by increasing the turns of receiving coils. However, it is not important to this kind of metal detector.…”

Section: Resultsmentioning

confidence: 99%

A differential probe design for large-range metal detector

et al. 2014

Sensor Review

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Purpose -The metal detector used as a wall scanner has become a kind of popular household instrument. It is important to possess the characteristics, including low-cost, reliability, easy repeatability and simple procedure in this device. The purpose of this paper is to found a model of differential probe applied to metal detector. Design/methodology/approach -The new model consists of an emitting coil and a differential receiving coil. The emitting coil uses winding inductance to produce a magnetic field and the receiving coil senses the change of magnetic flux. All turns of the receiving coil are designed in the same plane, so it can be fabricated with signal printed circuit board. The balance of differential probe is promised by the constraint relation of the parameters, including the radius and the turns of the receiving coil and the emitting coil. A novel fine adjustment has been proposed to offset the design error that can make the model more ideal. Findings -The differential probe can be produced easily and need not to be calibrated. In the design, the amplifier and the filter circuit is used for the output signal processing and the harmonic analysis based on Fourier transform is used to analyze the voltage signal in order to detect and distinguish the metallic object. The differential probe in the prototype, which area is p £ 35 2 (mm 2 ), can detect the cylindrical metallic object including iron, and aluminum which thickness is 2 mm and radius is 30 mm in the distance of 120 mm. Originality/value -The model of differential probe proposed in the paper is feasible and effective to apply in the hand-held metal detector.

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Section: Resultsmentioning

confidence: 99%

A differential probe design for large-range metal detector

et al. 2014

Sensor Review

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“…A robust wireless pressure monitoring system is needed which can reliably work in an unfavorable environment. The development and characterization of some of the wireless monitoring systems have been reported for wirelessly monitoring the parameters of a process, for example, oil‐well monitoring system , roof wind pressure monitoring system during hurricanes , a remotely powered sensing system for measuring absolute pressure, temperature, and relative humidity , continuously monitoring sensor resonance frequency variation , pressure measurement system for evaluating sensitivity of thick‐film oxide materials , long‐term structural (concrete, asphalt) monitoring system , mobile wireless network technology to monitor pipes for water provisioning , containment cooling fans’ health and performance monitoring in a nuclear power plant , etc. Low‐power wireless technologies such as Bluetooth or ZigBee have been mostly used for wirelessly measuring some parameters in a process.…”

Section: Introductionmentioning

confidence: 99%

RF transceiver‐based wireless pressure monitoring system

Kumar

Pathak

2016

Micro & Optical Tech Letters

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This article reports the development and characterization of a robust RF transceiver system for wireless monitoring of the pressure variation in a gas pipeline installed in an industry. Proposed system consists of a monolithic silicon pressure sensor for converting applied pressure information to a DC voltage output, a varactor‐based voltage controlled oscillator (VCO) for converting DC voltages to RF signal, a power amplifier for amplifying the transmitting RF signal, and two wideband microstip fed filtering antennas used in transmitter and receiver modules. Transmitting antenna is used for radiating the selected RF signal (conditioned pressure information) while reflecting the undesired harmonics. Filtering antenna (Filtenna) at the receiver side is used to detect the desired RF signal while filtering out the undesired signal. Operating frequency band of proposed wireless pressure monitoring system is 2.2565–2.5804 GHz covering lower ISM band (2.4–2.5 GHz). As a proof of concept, experiment has been performed for monitoring of a pressure variation in the range 0–50 kPa and for a distance of 2 m between transmitting and receiving antennas. The measured pressure sensitivity of the proposed gas pressure monitoring system is 6.4786 MHz/kPa with a good linearity response. Calibration curve and curve fitting equations are provided for evaluating the pressure variation in a gas pipeline by detecting the received RF signal at the receiver end. Proposed system can be used for wirelessly monitoring the pressure of a gas pipeline installed in an industry. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2237–2242, 2016

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“…Feedback bellows used here reduces the measurement error. Electrical type pressure transmitter [8], [9] consists of a comparator and an amplifier. Using this type of transmitter, better accuracy in pressure measurement can be achieved.…”

Section: Introductionmentioning

confidence: 99%

Two Wire Pressure Transmitter using Bourdon Tube Pressure Sensor and LVDT - An Advance Pressure Transmitter

Maitra¹

2015

CAE

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Bourdon Tube pressure Gauge is a mechanical type pressure transducer. Its display unit is a pointer attached with itself with a rack and pinion arrangement mounted at a spindle. Hence this cannot be used for remote measurement. Hence in order to measure the pressure sitting at the control station, a special measuring technique is to be adopted. The proposed technique, discussed in this paper, uses Linear Variable Differential Transformer (LVDT) and a twowire transmitter and this can be used for reading the pressure of a process remotely. A ferromagnetic plunger type core is attached with the tip of the Bourdon Tube. The core here acts as a secondary sensing element which moves in an electromagnetic field generated by an excitation voltage in the primary of an LVDT. The movement of the ferromagnetic core with the movement of the tip of the Bourdon Tube generates an induced voltage in the secondary of the LVDT. The output of the LVDT is connected with a two-wire pressure transmitter to produce 4-20 milliampear corresponding to the pressure variation. The measurement of the current gives the pressure of the process with a good linearity and repeatability. The necessary theoretical equations along with the experimental results have been reported here clearly.

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A Remote Query Pressure Sensor Based on Magnetic Higher Order Harmonic Fields

Cited by 15 publications

References 26 publications

A differential probe design for large-range metal detector

A differential probe design for large-range metal detector

RF transceiver‐based wireless pressure monitoring system

Two Wire Pressure Transmitter using Bourdon Tube Pressure Sensor and LVDT - An Advance Pressure Transmitter

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