Thermal oxidation tester heater tube deposit evaluator and method of using
Abstract
Abstract A CHOPPED LIGHT BEAM IS DIVIDED INTO A MEASURING BEAM AND A REFERENCE BEAM. THE MEASURING BEAM IS IMPINGED ON A THERMAL OXIDATION TESTER HEATER TUBE. AFTER INTEGRATION OF THE LIGHT REFLECTED FROM THE TUBE, AN ELECTRICAL SIGNAL REPRESENTATIVE OF THE INTENSITY OF THAT LIGHT IS DEVELOPED AND COMPARED WITH AN ELECTRICAL SIGNAL GENERATED FROM THE REFERENCE BEAM. DUE TO THE CHOPPING OF THE LIGHT THESE ARE ALTERNATING CURRENT SIGNALS. INITIALLY, THE POINT OF IMPINGEMENT ON THE TUBE IS A CLEAN AREA AND THE OUTPUT INDICATION OF THE ELECTRICAL SIGNALS IS ESTABLISHED AT ZERO. THEREAFTER, A CONDITION OF NO REFLECTION IS ESTABLISHED AND THE OUTPUT INDICATION IS ESTABLISHED AT A MAXIMUM. THEREAFTER, THE POINT OF IMPINGEMENT IS ESTABLISHED AT AN AREA ON THE TUBE HAVING A DEPOSIT. THE OUTPUT INDICATION REFLECTS THE EXTENT TO WHICH THE REFLECTED LIGHT IS DIMINISHED BY THE PRESENCE OF THE DEPOSIT.
Inventors
- 👤 Malcolm G Townsley
Bibliographic Details
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