| 摘要 |
The disclosure relates to a method of monitoring the stay time in a restricted conduit, such as a holding tube in a heat treatment plant. A first measurement registration x of a chemical or physical magnitude, such as the temperature, takes place in the beginning of the restricted conduit. A second measurement registration y of the same chemical or physical magnitude, i.e. the temperature, takes place in the end of the restricted conduit. X and y measure natural temperature variations in the product for which the intention is to control the stay time. The stay time is determined by the time lag t at the best co-variation between x and y. By filtering the measurement registration for y, it is possible to refine the measurement method and compensate for dispersion in the product. |
