Method and arrangement for determining the water permeability of clothing in a paper machine

Abstract

A method for determining the water permeability of clothing for a machine for producing and/or treating a material web, in particular paper or board web, including the following steps: aiming at least some, in particular high-energy, radiation at the clothing, measuring the amounts of energy penetrating the clothing and/or measuring the amounts of energy reflected by the clothing. In addition, a corresponding arrangement for carrying out the method is specified.

1 . A method for determining a water permeability of a clothing for a machine for at least one of producing and treating a material web, comprising the steps of: 
 aiming a radiation energy at the clothing; and    measuring at least one of an amount of said radiation energy penetrating the clothing and an amount of said radiation energy reflected by the clothing.    
   
   
       2 . The method of  claim 1 , wherein the material web is one of a paper web and a board web.  
   
   
       3 . The method of  claim 1 , wherein said radiation energy is a high energy radiation.  
   
   
       4 . The method of  claim 1 , further including the step of forming the clothing by a press felt.  
   
   
       5 . The method of  claim 1 , further including the step of supplying said radiation energy with an energy source, said energy source being at least one light source.  
   
   
       6 . The method of  claim 5 , further including the step of generating at least one of a high intensity light and a laser beam with said energy source.  
   
   
       7 . The method of  claim 1 , further including the steps of supplying said radiation energy with an energy source and generating a sound wave with said energy source.  
   
   
       8 . The method of  claim 7 , wherein said energy source generates an ultrasound wave.  
   
   
       9 . The method of  claim 1 , further including the steps of supplying said radiation energy with an energy source and defining an intensity of said energy source as a function of at least one of a clothing structure, a felt structure, a plurality of particle sizes of a soiling, a plurality of fillers of said soiling, the web material and a paper stock.  
   
   
       10 . The method of  claim 1 , further including the step of oscillating said radiation energy over a width of the clothing.  
   
   
       11 . The method of  claim 10 , further including the steps of supplying said radiation energy with an energy source and measuring said amount of said radiation energy penetrating the clothing by a sensor traversing over said width of the clothing on a rear side of the clothing, said rear side facing away from the energy source.  
   
   
       12 . The method of  claim 10 , wherein said radiation energy includes a rate of oscillation which is selected so that so that said measuring step is carried out at as many measurement points as possible over said width of the clothing.  
   
   
       13 . The method of  claim 1  further including the steps of supplying said radiation energy with an energy source, traversing said energy source over a width of the clothing, measuring said amount of said radiation energy reflected by the clothing and evaluating said amount of said radiation energy reflected by the clothing.  
   
   
       14 . The method of  claim 1 , further including the steps of supplying said radiation energy with an energy source, aiming said energy source at the clothing over an entire width of the clothing and measuring said amount of said radiation energy penetrating the clothing on a side of the clothing opposite said energy source.  
   
   
       15 . The method of  claim 14 , further including the steps of measuring said amount of said radiation energy penetrating the clothing on a side of the clothing opposite said energy source by a sensor and traversing the clothing transversely with said sensor.  
   
   
       16 . The method of  claim 1 , further including the steps of supplying said radiation energy with an energy source and contacting the clothing with said energy source over an entire width of the clothing.  
   
   
       17 . The method of  claim 1 , further including the steps of supplying said radiation energy with an energy source and aiming said energy source at the clothing via a transparent medium resting on the clothing.  
   
   
       18 . The method of  claim 17 , wherein said transparent medium is a glass.  
   
   
       19 . The method of  claim 17 , wherein said transparent medium is an opal glass.  
   
   
       20 . The method of  claim 17 , wherein at least one of said amount of said radiation energy penetrating the clothing and said amount of said radiation energy reflected by the clothing are measured via a transparent medium.  
   
   
       21 . The method of  claim 20 , wherein said transparent medium is a glass.  
   
   
       22 . The method of  claim 20 , wherein said transparent medium is an opal glass.  
   
   
       23 . The method of  claim 1 , further including the step of oscillating said radiation energy between an operator side of the machine and a drive side of the machine.  
   
   
       24 . The method of  claim 23 , said radiation energy oscillates at a high speed.  
   
   
       25 . The method of  claim 23 , further including the step measuring said amount of said radiation energy penetrating the clothing with a sensor traversing on a side of the clothing opposite said energy source.  
   
   
       26 . The method of  claim 23 , further including the steps of supplying said radiation energy with an energy source and measuring said amount of said radiation energy reflected from the clothing by a sensor installed on a side of the clothing of said energy source.  
   
   
       27 . The method of  claim 1 , further including the step of drawing conclusions from said measuring step about at least one of a state of one of the clothing and a felt, a thickness of one of the clothing and a felt and a soiling of one of the clothing and a felt.