SAW Oscillator Pressure Sensors

Reeder, T.M.; Cullen, Donald E.; Gilden, M.

doi:10.1109/ultsym.1975.196515

Cited by 37 publications

(6 citation statements)

References 7 publications

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“…The first ideas of using surface acoustic wave (SAW) devices as sensors have already been developed around 40 years ago [ 1 , 2 , 3 , 4 ] with a continuous development since then for a wide range of application fields. SAW sensors are proven to work in harsh environments [ 5 ] and are used for sensing of temperature, pressure, torque, acceleration, humidity and more [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Reader Architectures for Wireless Surface Acoustic Wave Sensors

Lurz

Ostertag²,

Scheiner

et al. 2018

Sensors

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Wireless surface acoustic wave (SAW) sensors have some unique features that make them promising for industrial metrology. Their decisive advantage lies in their purely passive operation and the wireless readout capability allowing the installation also at particularly inaccessible locations. Furthermore, they are small, low-cost and rugged components on highly stable substrate materials and thus particularly suited for harsh environments. Nevertheless, a sensor itself does not carry out any measurement but always requires a suitable excitation and interrogation circuit: a reader. A variety of different architectures have been presented and investigated up to now. This review paper gives a comprehensive survey of the present state of reader architectures such as time domain sampling (TDS), frequency domain sampling (FDS) and hybrid concepts for both SAW resonators and reflective SAW delay line sensors. Furthermore, critical performance parameters such as measurement accuracy, dynamic range, update rate, and hardware costs of the state of the art in science and industry are presented, compared and discussed.

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Section: Introductionmentioning

confidence: 99%

Reader Architectures for Wireless Surface Acoustic Wave Sensors

Lurz

Ostertag²,

Scheiner

et al. 2018

Sensors

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“…The first pressure sensor based on SAW was proposed in 1975 by Reeder et al [ 7 ]. It consisted of SAW delay line transducers fabricated on the surface of a pressure-dependent membrane made of ST-X quartz.…”

Section: Introductionmentioning

confidence: 99%

Passive Downhole Pressure Sensor Based on Surface Acoustic Wave Technology

Quintero

Figueiredo

Takahashi

et al. 2017

Sensors

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A passive surface acoustic wave (SAW) pressure sensor was developed for real-time pressure monitoring in downhole application. The passive pressure sensor consists of a SAW resonator, which is attached to a circular metal diaphragm used as a pressure transducer. While the membrane deflects as a function of pressure applied, the frequency response changes due to the variation of the SAW propagation parameters. The sensitivity and linearity of the SAW pressure sensor were measured to be 8.3 kHz/bar and 0.999, respectively. The experimental results were validated with a hybrid analytical–numerical analysis. The good results combined with the robust design and packaging for harsh environment demonstrated it to be a promising sensor for industrial applications.

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“…In recent years there has been growing attention to surface acoustic wave (SAW) devices for the detection of various physical and chemical parameters including temperature [1,2], acceleration [3][4][5][6][7][8], force [9], pressure [10][11][12][13], DC and AC high voltages [14][15][16], electric fields [17], magnetic fields [18], weight percentage in solutions [19], ionic concentration [20], gas flow [21], dew point [22] and gas and vapour concentration [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38]. Table 1 gives an idea of the research work done since 1981 on SAW chemical sensors.…”

Section: Introductionmentioning

confidence: 99%

Advances in SAW-based gas sensors

Caliendo

Verardi

Verona

et al. 1997

Smart Mater. Struct.

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This paper deals with some advances in surface acoustic wave (SAW) sensor research relating to the use of both a new chemically interactive material (metal porphyrin) and new amplifiers for low-noise SAW oscillators, which are illustrated and discussed in some detail. The trend toward SAW matrixes, implemented on silicon, required for more sensitive chemical image systems, has led to the observation of coupling effects between adjacent SAW oscillators, even if the electronics were not implemented on Si. This effect must be considered at design level in order to achieve a higher resolution value in detecting either single chemical species or chemical images.

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SAW Oscillator Pressure Sensors

Cited by 37 publications

References 7 publications

Reader Architectures for Wireless Surface Acoustic Wave Sensors

Reader Architectures for Wireless Surface Acoustic Wave Sensors

Passive Downhole Pressure Sensor Based on Surface Acoustic Wave Technology

Advances in SAW-based gas sensors

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