ABSTRACT
Figure 26.7 shows the signal processing for one measuring zone (the blocks within the dashed line) as well as the common part for the entire equipment. The transducer signal from zone x is rectified and filtered in block 1. The output signal is a de voltage that is proportional to the force F x . In block 4, the mean value F m of the forces F x from all zones that are covered by the strip is formed. The mechanical mean stress o 0 is calculated in block 6 with the aid of data for the strip. The quotient o 0 I F m is formed in block 5 and multiplied by F x in block 2. The output signal F x o 0 IF m is equal to the local mechanical stress ox in the strip. Finally, o 0 is subtracted in block 3 and the difference 6o x = ox - o 0 constitutes the output signal and is displayed on a separate instrument for each measuring zone.
