High functionalities for intelligent sensors, application to fuzzy colour sensor

If the main use of colour measurement is metrology, it is now possible to f ind industrial control applications which use this information. Using colou r in process control leads to specific problems where human perception has to be replaced by colour sensors. This paper relies on the fuzzy representa tion of colours that can be taken into account by fuzzy controllers. If sma rt sensors already include intelligent functionalities like signal processi ng, or configuration, only few of them include functionalities to elaborate the fuzzy representation of measurements. In this paper, we develop a solu tion where the numeric processing is performed locally by the sensor, and w here fuzzy processing is exported towards another computing resource by mea ns of the CAN network. This paper presents the concept and the application to a smart fuzzy spectrometer. (C) 2001 Elsevier Science Ltd. All rights re served.