Apparatus having inductively coupled coaxial coils for measuring

Details Apparatus having inductively coupled coaxial coils for measuring Apparatus having inductively coupled coaxial coils for measuring

1987-02-20

1989-05-09

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Fluid material examination

110349, 324219, 324226, 324239, G01N 2772, G01R 3312, F23B 100

Patent

active

048292460

ABSTRACT:
The buildup of slag or ash on the interior surface of a furnace wall is monitored by disposing two coils to form a transformer which is secured adjacent to the inside surface of the furnace wall. The inductive coupling between the two coils of the transformer is affected by the presence of oxides of iron in the slag or ash which is adjacent to the transformer, and the application of a voltage to one winding produces a voltage at the other winding that is related to the thickness of the slag or ash buildup on the inside surface of the furnace wall. The output of the other winding is an electrical signal which can be used to control an alarm or the like or provide an indication of the thickness of the slag or ash buildup at a remote location.

REFERENCES:
patent: 2104644 (1938-01-01), Greenslade
patent: 3152303 (1964-10-01), Lary et al.
patent: 3164993 (1965-01-01), Schmidt
patent: 3838372 (1974-09-01), Damijonaitis
patent: 4019130 (1977-04-01), Sakamoto et al.
patent: 4027233 (1977-05-01), Shmakov et al.
patent: 4219805 (1980-08-01), Magee et al.
patent: 4511371 (1985-04-01), Blaskowski
patent: 4552098 (1985-11-01), Wynnyckyj et al.
patent: 4556019 (1985-12-01), Wynnyckyj et al.
Abstract Submitted For The March 1986 Meeting of The American Physical Society, Nov. 27, 1985.

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