Valve diagnostic system including auxiliary transducer box

Details Valve diagnostic system including auxiliary transducer box Valve diagnostic system including auxiliary transducer box

1991-01-30

1993-10-12

Harvey, Jack B.

Boots, shoes, and leggings

364509, 1374875, G06F 1520, G08B 2100

Patent

active

052531856

ABSTRACT:
Equipment for acquiring diagnostic data from a valve train parameter that changes as a result of the operation of a valve (14) in a process plant is positioned as an auxiliary data acquisition unit (200) in the vicinity of the valve train. A plurality of sensor lines (P3, P4) are connected between the auxiliary unit and locations in the valve train where the parameter changes. The valve is operated so as to generate parameter signals manifested in a first physical form in the sensor lines. In the auxiliary unit, the physical form of the parameter signals is converted into diagnostic signals (E10, E11) having a different physical form. The diagnostic signals are transmitted to a base data acquisition unit (100) that is physically distinct from the auxiliary unit.

REFERENCES:
patent: 4694390 (1987-09-01), Lee
patent: 4816987 (1989-03-01), Brooks et al.
patent: 4855729 (1989-08-01), Takguchi et al.
patent: 4976144 (1990-12-01), Fitzgerald
patent: 5109692 (1992-05-01), Fitzgerald
Soviet Patent Abstracts, PQ General/Mechanical, week 9109 Apr. 17, 1991, Derwent Publications Ltd.
EP, A1, 0 309 643 (Landis & Gyr) Apr. 5, 1989.

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