Amplifying system for solenoid controlled proportion valve

Details Amplifying system for solenoid controlled proportion valve Amplifying system for solenoid controlled proportion valve

1994-04-18

1997-06-17

Lee, Kevin

Fluid handling

Systems

Programmer or timer

25112908, F16K 3106

Patent

active

056388632

ABSTRACT:
This invention is concerned with an amplifying system with a microprocessor which makes it possible to adjust parameters easily with a simple construction and to perform automatically a simple repeating work without manual operation. The system is also provided with a safety mechanism to prevent system errors, an alarm unit and a display unit to indicate errorneous operations and a failure diagnosis means to detect failure. The microprocessor of the amplifying system operates at least one solenoid proportion valve by producing a control signal consisting either of dither signals of a triangular wave or of pulse signals of a variable duty cycle.

REFERENCES:
patent: 4103695 (1978-08-01), Aono
patent: 4503841 (1985-03-01), Tsukaya et al.
patent: 4562552 (1985-12-01), Miyaoka et al.

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