Wireless moisture measurement for the roll coatings of fiber web machines and measuring equipment

Abstract

The various embodiments of the invention are connected to a radio-frequency identifier of the roll coating in a fiber web machine. The fiber web machine comprises a radio-frequency identifier (for example RFID, RFID-tag), so that the moisture content can be measured from the roll or from the roll coating of a fiber web machine.

1 . A fiber web machine, the fiber web machine comprising a radio-frequency identifier, so that moisture can be measured from roll or roll coating of the fiber web machine. 
   
   
       2 . A fiber web machine according to  claim 1 , wherein the radio-frequency identifier is placed in the coating of the fiber web machine roll or in the vicinity of said coating. 
   
   
       3 . A fiber web machine according to  claim 1 , wherein the radio-frequency identifier is placed on boundary surface of the roll coating. 
   
   
       4 . A fiber web machine according to  claim 1 , the fiber web machine further comprising several radio-frequency identifiers in the coating of the roll or in the vicinity of said coating. 
   
   
       5 . A fiber web machine according to  claim 1 , wherein the radio-frequency identifier comprises an RFID device. 
   
   
       6 . A fiber web machine according to  claim 1 , wherein the fiber web machine comprises the radio-frequency identifier, so that moisture can be defined either roll-specifically or location-specifically. 
   
   
       7 . A fiber web machine according to  claim 1 , wherein the radio-frequency identifier has a determined location, so that moisture can be defined location-specifically from the roll or from the roll coating. 
   
   
       8 . A fiber web machine according to  claim 1 , the fiber web machine further comprising means for defining the drying time and location on a basis of the measured moisture data. 
   
   
       9 . A fiber web machine according to  claim 1 , wherein the radio-frequency identifier includes an integrated moisture sensor. 
   
   
       10 . A fiber web machine according to  claim 1 , wherein the radio-frequency identifier is arranged to be connected to a moisture detector, so that the radio-frequency identifier transmits data obtained from the moisture detector. 
   
   
       11 . A fiber web machine according to  claim 1 , wherein the radio-frequency identifier is arranged to be switched on or off, in case the moisture content in the vicinity of the radio-frequency identifier exceeds a given threshold value. 
   
   
       12 . A roll of a fiber web machine, comprising a roll frame and on top of the roll frame, a coating made of polymer material, wherein the roll comprises means for measuring moisture wirelessly from the roll or from the roll coating. 
   
   
       13 . A roll according to  claim 12 , wherein said means comprise a radio-frequency identifier that is placed in the coating of the fiber web machine roll or in the vicinity of said coating. 
   
   
       14 . A roll according to  claim 12 , wherein the radio-frequency identifier is placed on a boundary surface of the roll coating and the roll frame. 
   
   
       15 . A roll according to  claim 12 , the roll further comprising several radio-frequency identifiers located in the coating of the roll or in the vicinity thereof. 
   
   
       16 . A roll according to  claim 12 , wherein the radio-frequency identifier comprises an RFID device. 
   
   
       17 . A roll according to  claim 12 , the roll further comprising a radio-frequency identifier, so that moisture can be defined either roll-specifically or location-specifically. 
   
   
       18 . A roll according to  claim 12 , wherein the radio-frequency identifier has a defined place of location, so that moisture can be defined location-specifically from the roll or from the roll coating. 
   
   
       19 . A roll according to  claim 12 , wherein the radio-frequency identifier includes an integrated moisture sensor. 
   
   
       20 . A roll according to  claim 12 , wherein the radio-frequency identifier is arranged to be connected to a moisture detector, so that the radio-frequency identifier transmits the data obtained from the moisture detector. 
   
   
       21 . A roll according to  claim 12 , wherein the radio-frequency identifier is arranged to be switched on or off, in case the moisture content in the vicinity of the radio-frequency identifier exceeds a given threshold value. 
   
   
       22 . A method for measuring moisture in the coating of the fiber web machine roll or in the vicinity of said coating, comprising:
 utilizing the fiber web machine according to  claim 1 .   
   
   
       23 . A method for measuring moisture in a coating of a roll of a fiber web machine, in which:
 data is received wirelessly from the roll or from the roll coating for   defining the moisture content.   
   
   
       24 . A method according to  claim 23 , wherein the received data further is analyzed, so that the moisture content in the roll and its respective position in the roll can be identified. 
   
   
       25 . A method according to  claim 23 , in which the received data also is displayed. 
   
   
       26 . A method for defining moisture in a coating of a roll of a fiber web machine roll, in which:
 data is transmitted wirelessly from the roll or from the roll coating, which data indicates the moisture content in the roll coating or in the roll.   
   
   
       27 . A method according to  claim 26 , wherein the wireless transmission of the data is performed according to a request. 
   
   
       28 . A method according to  claim 26 , wherein the wireless transmission of the data is performed in periodically. 
   
   
       29 . A method according to  claim 26 , wherein the data is transmitted to a machine control program in order to optimize a point of time of the drying process.