Paint flow control interface

Details Paint flow control interface Paint flow control interface

1995-12-19

1997-05-13

Martin, David S.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

239 63, 239 64, 239 65, 239 66, 239 67, 239 68, 361 54, 361 55, G05B 1302

Patent

active

056295707

ABSTRACT:
Paint flow control interface circuitry for passing electrical signals across a paint booth barrier including a feedback signal indicating a paint flow parameter from a parameter transducer within the paint booth, includes passive resistive intrinsically safe barrier circuit elements coupled with buffer circuitry for minimizing the voltage drop across the interface circuitry. Light filtering of the buffer circuitry output signal with minimum filter lag yields an accurate indication of the paint flow parameter with high signal to noise ratio and minimum signal lag, for application in closed-loop paint flow control. Additional transducer voltage supply signal feedback provides for closed-loop voltage supply control across the interface circuit.

REFERENCES:
patent: 4487367 (1984-12-01), Perry et al.
patent: 4494064 (1985-01-01), Harkness
patent: 4614300 (1986-09-01), Falcoff
patent: 4922952 (1990-05-01), Sasaki
patent: 5102045 (1992-04-01), Diana
patent: 5182704 (1993-01-01), Bengtsson
patent: 5189697 (1993-02-01), Das et al.

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