Measuring Temperature for Monitoring and Control of a Fiber Web or Finishing Machine

A system for the monitoring and control of at least one operating condition of a fiber web machine or paper finishing machine, which system is arranged to be carried out on a rotatable machine element which is equipped with a sensor assembly that measures temperature, the system comprising:

• a sensor assembly for measuring temperature and generating a measurement signal, arranged on at least one of a shell and a coating on the shell of the machine element and arranged to generate a measurement signal from the temperature of the machine element;
• a circuit arranged to generate a cross-directional temperature profile of the machine element from the measurement signal which changes with time;
• a computer terminal arranged to examine said cross-directional profile;
• a digital storage memory;
• wherein the circuit is arranged to generate one or more reference profiles from the measurement signal generated by the sensor assembly, which one or more reference profiles do not change with time and are arranged to be stored in the digital storage memory;
• wherein the circuit is arranged to compare the cross-directional temperature profile which changes with time and at least one of one or more reference profiles to show change concerning the at least one operating condition of the fiber web machine or paper finishing machine;
• and
• wherein the computer terminal is arranged to generate information concerning change in the at least one operating condition of the fiber web machine or paper finishing machine from the circuit arranged to compare the cross-directional temperature profile which changes with time and at least one reference profile and wherein the computer terminal is arranged to perform actions, based on said change, on the fiber web machine or paper finishing machine.