Process control equipment for adverse environments

Details Process control equipment for adverse environments Process control equipment for adverse environments

1987-04-22

1989-05-16

Gruber, Felix D.

Boots, shoes, and leggings

73620, 364561, 36457105, 367 99, G01S 1546, G06F 1574

Patent

active

048315656

ABSTRACT:
Microprocessor controlled industrial monitoring equipment uses a separate portable keypad which can be applied to a sealed casing containing a control unit to transmit commands and calibration to the equipment, which normally operates and provides a display of information in the absence of the keypad. The equipment is usually acoustic level sensing apparatus, in which pulses of acoustic energy are transmitted by an electrically energized transducer towards a surface to be sensed, and the electrical output from the transducer following the pulse is digitized and analyzed to detect a return echo from the surface. Various techniques of analysis of the digital data so produced are disclosed, so as variously to detect echoes more reliably, to assist in aligning the transducer during installation, and so as to detect open or short circuited transducers

REFERENCES:
patent: 4330174 (1982-05-01), Douglass et al.
patent: 4436431 (1984-03-01), Strong et al.
patent: 4596144 (1986-06-01), Panton et al.
patent: 4675854 (1987-06-01), Lau
patent: 4700569 (1987-10-01), Michalski et al.
patent: 4703359 (1987-10-01), Rumbolt et al.

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