EngineeringChemical EngineeringFood ScienceAnalytical ChemistryFood AnalysisSensorsAcoustic SensorsAcoustic Signal ProcessingChemical SensorsGas SensorsSensor MaterialsSensor-based AnalysisGas DetectionGas SensingGas Sensor ArraysOrganic Molecule DetectionQuantitative DeterminationSensor Sensing PrinciplesSensor TechnologySurface Acoustic Wave Gas Sensors
SAW‑based sensor systems are being explored for organic gas detection, with prototypes demonstrating applicability to industrial process control tasks. The study examines the commercial viability of SAW‑based sensor systems and presents three prototype analytical devices for organic gas detection. The prototypes comprise an array of eight polymer‑coated SAW devices operating at 433.92 MHz, with polymer selection and neural‑network pattern recognition enabling detection of diverse organic gases. The devices quantitatively determine ternary gas mixtures and qualitatively discriminate complex gas mixtures from raw food products at various spoilage stages.
In this work the potential of commercialization of sensor systems based on SAW devices in contrast to other sensor principles is discussed. After given motivation for this sensor technology a first series of three different prototypes of analytical sensor systems for organic gas detection based on commercially available SAW devices is presented. Central component is an array of eight polymer coated SAW devices working at a frequency of 433.92 MHz. By an adequate selection of polymers and the use of neuronal networks for automatic pattern recognition of sensor signals a broad variety of gaseous organic analytes can be determined. Of particular interest are realistic tasks of organic gas detection for the industrial process control. Examples of a quantitative determination of the composition of ternary gas mixtures are shown as well as a qualitative discrimination of typical complex gas mixtures arising from raw food products in different states of spoilage.
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Fast learning with incremental RBF networks
Bernd Fritzke · Neural Processing Letters · 1994 · 190 citations
Multidimensional sensor for gas analysis
R. Müller, Eckhard Lange · Sensors and Actuators · 1986 · 91 citations