Array Sensors and Pattern Recognition

Arrays of sensors have received a great deal of interest for many reasons. In the case of physical sensor devices, an array of sensors can provide vastly improved spatial resolution of the phenomenon being measured. By combining sensors of different types, a more comprehensive measurement can be made, perhaps over a much wider dynamic range of measurand values. In the case of chemical sen sors, arrays have grown in popularity as a means to enhance selectivity and versatility. Indeed, preliminary efforts in this direction have proved the concept of building an electronic nose based on the acoustic array sensor/pattem recognition approach [43,44]. 

F re 6.18 Typical response patterns obtained ftom a four-SAW-device array sensor the magnitude of each response is given by the height of the bar and numerically as a percentage at the tqp of each panel. 

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