VisionSensor™ ‐ a unique solution to particle size distribution analysisBo T. Jakobsen
1998 Sensor Review
doi: 10.1108/02602289810198284
Vision technology is gaining more and more acknowledgement in the process industry as an effective way for a company to ensure high quality of production. After an introduction to vision technology, we will give a deeper description of the VisionSensor™, which is uniquely designed for on‐line integration in real‐world industrial environments. The description of the VisionSensor™ will encompass where the system can be used, how it works, comparing its merits with alternative techniques and finally a description of two case stories from the sugar and fertiliser industries.
Optical pressure and temperature sensors for aerospace applicationsRobert A. Pinnock
1998 Sensor Review
doi: 10.1108/02602289810198293
This paper gives a brief overview of requirements within the aerospace market sector for which optical sensors are of potential benefit, and goes on to describe sensors currently under development at Lucas Electrical and Electronic Systems which are primarily intended to meet some of these requirements. These sensors, based on the combination of silicon micromachining and optical sensing technologies, are sufficiently robust to provide the capability of directly measuring on‐engine parameters such as pressure and temperature. In association with FADEC‐mounted interface units, to which the sensor heads are coupled via optical fibre links, the sensors have the potential to provide measurement data for a number of aero‐engine control requirements.
Optical fibre Bragg gratings: a new sensor multiplexing toolVincent A. Handerek
1998 Sensor Review
doi: 10.1108/02602289810198301
Optical fibre multiplexed sensors are used to make measurements at multiple, discrete locations, usually by sending optical signals between each measurement location and a conveniently positioned optical interrogation instrument. It is rapidly becoming practical to construct multiplexed optical fibre sensor arrays based on in‐fibre Bragg gratings. A Bragg grating can be produced in an optical fibre by writing a periodic variation in the refractive index of the fibre’s core along the axis, using ultra‐violet light. Multiplexing applications will appear ranging from the small scale, with only a few sensors, up to very large scales with hundreds of sensors.
Optical fibre sensing for intelligent monitoring using chromatic methodologiesP.C. Russell; J.W. Spencer; G.R. Jones
1998 Sensor Review
doi: 10.1108/02602289810198310
A brief description is given of chromatic optical fibre sensing with particular reference to the monitoring of semiconductor plasma processing. Via this particular example it is shown how such chromatic sensing forms a convenient basis for interconnecting the sensing function of fibre based devices with modern signal processing methodologies enabling intelligent monitoring systems to be assembled. The generic nature of chromatic sensing is illustrated by reference to a number of sensors for addressing different measureands and the route for extending the methodology for the intelligent monitoring of high voltage circuit breakers is indicated as an example of the wider application of the approach.