Communications: electrical – Continuously variable indicating – Combined
Patent
1994-03-14
1997-12-30
Hofsass, Jeffery
Communications: electrical
Continuously variable indicating
Combined
34087019, 34087018, 342 42, 342 51, G01S 1375
Patent
active
057035741
ABSTRACT:
A method and device for transferring a measurement signal from a revolving roll used in a paper making machine, in which detectors are arranged in the transverse direction of the roll, preferably uniformly spaced. Measurement signals generated by the detectors are passed to a measurement signal reading unit for reading the measurement of the detectors which is installed preferably at the end of the roll. From the measurement signal reading unit, the signals are transmitted wirelessly further as telemeter signals to a reading unit which is placed outside the roll and connected to a PC or equivalent computer. In the measurement signal reading unit for reading the measurement of the detectors, a transponder is arranged into which an unique code is coded for each detector. The signals are processed in the entire measurement process as analog signals. In the transfer of the telemeter signals between the unit for reading and measurement of the detectors and the reading unit placed outside the roll, a substantially low transfer frequency of an order of from about 100 kHz to about 150 kHz is employed.
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Hofsass Jeffery
Valmet Corporation
Wong Albert K.
LandOfFree
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