ROLL PRESSURE MEASURING APPARATUS

摘要

PURPOSE:To enable accurate and quick measurement of the inter-roll pressure and nip width by inserting between rolls a pressure detecting section provided with a flat large-area electrode and a plurality of parallel long and thin electrodes mounted on a sheet employing a piezo-electric organic high polymer material. CONSTITUTION:A pressure detecting section 1 has a detection region I of large- area electrodes 7a1 and 7b1 and a detection region II having long and thin small- area electrodes 7a2 and 7b2 arranged in parallel at a specified pitch on a sheet 6 made of a piezo-electric high polymer material. The long and thin electrodes coincide length-wise with the axial direction of rolls 9-a and 9-b to be measured so that the regions I and II comes in contact with the rolls. A circuit 21 of an arithmetic section 2 integrates the signal in the region I by time and circuit 22- 25 performs a specified computation by waveform shaping detection signals of the electrodes in the region II. This enables accurate measurement of the inter- roll pressure and the nip width while providing a better reproducibility regardless of repeated use.