Surface Acoustic Wave Vibration Sensor Electronic System

Filipiak, J.; Solarz, Lech; Steczko, G.

doi:10.12693/aphyspola.120.598

Cited by 4 publications

(2 citation statements)

References 10 publications

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“…The tests of the theory outlined here can be carried out using almost any system with a Rayleigh's wave device that allows easy measurement of its parameters. In general, self-excited generation systems are used for this purpose, using SAW delay lines or resonators [11,12]. However, these systems have the disadvantage of being only suitable for the measurement of frequency changes.…”

Section: Measuring Setmentioning

confidence: 99%

Surface acoustic waves application for gas leakage detection

Pasternak¹,

Jasek

Grabka

2020

Diagnostyka

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Surface Acoustic Waves (SAW) are by their nature very sensitive to changes in physical propagation conditions. This statement relates primarily to the properties of the substrate, i.e. the surface on which these waves propagate, but under certain conditions it also refers to the parameters of the gaseous environment directly in contact with the substrate. The influence of this environment on SAW parameters can be used to detect specific gases that are present in this environment and change its density. The basic research problem was to determine the dependence of the resonant frequency and attenuation of waves in a resonator with SAW on the parameters and concentrations of specific gases in the gaseous environment in which the resonator works. The secondary objective was to determine whether this dependence is strong enough to be used for the construction of sensors and whether it is possible to identify gases present in the environment based on such measurements. Two-port resonators from SAW and measuring stand of our own design were used for the research. The analyses conducted and laboratory measurements confirmed the existence of the abovedescribed dependence. It was found that it increases with the increase of the difference between the molar mass of the gas being tested and the average molecular mass of the gaseous environment. This fact makes the proposed method suitable for detection of gases of relatively low or high molar masses. In air it is possible to detect hydrogen, helium, krypton, xenon and vapour of volatile compounds with sufficiently high molar masses.

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Section: Measuring Setmentioning

confidence: 99%

Surface acoustic waves application for gas leakage detection

Pasternak¹,

Jasek

Grabka

2020

Diagnostyka

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“…An additional advantage of sensors based on carbon materials is the low temperature of their operation [17]. Beyond resistive sensors [9,1921], sensors with an acoustic wave play an important role in detecting the selected gases [2,4]. Such sensors are characterized * corresponding author; e-mail: Tadeusz.Pustelny@polsl.pl by a high sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Investigations of SAW Structures with Oxide Graphene Layer to Detection of Selected Gases

et al. 2013

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In this paper we present the results of investigations of graphene oxide layers using the SAW structure (structure with surface acoustic wave propagated) exposed to the aect of low concentrations of hydrogen and nitrogen dioxide in synthetic air. During the measurements, the dierential signal (from two measuring channels) was recorded. The sensing graphene oxide layer was deposited only on rst channel, whereas the second channel was not covered by any additional layer. The tests were made with various concentrations of the analyzed gases and at various temperatures of the sensing structure during the measurements. Analyses were performed with special emphasis on the time response of the sensor structure to changes in the gas atmosphere.

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A wireless demodulation system based on a multi-parameter resonant sensor

Wang

Liang

Zhang

et al. 2023

Review of Scientific Instruments

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This paper proposes a wireless passive measurement system that supports real-time signal acquisition, multi-parameter crosstalk demodulation, and real-time storage and calculation. The system consists of a multi-parameter integrated sensor, an RF signal acquisition and demodulation circuit, and a multi-functional host computer software. The sensor signal acquisition circuit uses a wide frequency detection range (25 MHz–2.7 GHz) to meet the resonant frequency range of most sensors. Since the multi-parameter integrated sensors are affected by multiple factors, such as temperature and pressure, there will be interference between them, so the algorithm for multi-parameter decoupling is designed, and the software for sensor calibration and real-time demodulation is developed to improve the usability and flexibility of the measurement system. In the experiment, temperature and pressure dual-reference integrated surface acoustic wave sensors in the condition of 25–550 °C and 0–700 kPa are used for testing and verification. After experimental testing, the swept source of the signal acquisition circuit can meet the output accuracy in a wide frequency range, and the detection result of the sensor dynamic response is consistent with that of the network analyzer, with a maximum test error of 0.96%. Furthermore, the maximum temperature measurement error is 1.51%, and the maximum pressure measurement error is 5.136%. These results indicate that the proposed system has good detection accuracy and demodulation performance, and it can be used for multi-parameter wireless real-time detection and demodulation.

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Surface Acoustic Wave Vibration Sensor Electronic System

Cited by 4 publications

References 10 publications

Surface acoustic waves application for gas leakage detection

Surface acoustic waves application for gas leakage detection

Investigations of SAW Structures with Oxide Graphene Layer to Detection of Selected Gases

A wireless demodulation system based on a multi-parameter resonant sensor

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