Pressure controller

Details Pressure controller Pressure controller

1995-04-25

1996-11-26

Voeltz, Emanuel T.

Boots, shoes, and leggings

123571, G01N 700

Patent

active

055792448

ABSTRACT:
A pressure controller of the type using pulse width modulated apply and release solenoid valves (80, 82) connected to an outlet port (74) of the controller overcomes the technical problem of poor control stability by using a digital control loop (98, 100, 76, 78) which utilizes stored bias characteristics representing the variation with pressure of the value (n.sub.o) of the pulse width modulation signal at which each valve initiates flow (n.sub.o). These values are determined in a characterisation step conducted with the controller off-line. The values may be modified during on-line operation of the controller by monitoring the stability of the controller or other signals representing the opening and closing of the valves.

REFERENCES:
patent: 4233947 (1980-11-01), Abo
patent: 4241750 (1980-12-01), Furuse et al.
patent: 4539967 (1985-09-01), Nakajima et al.
patent: 4566868 (1986-01-01), Menzies
patent: 4587883 (1986-05-01), Ehrentraut et al.
patent: 4766921 (1988-08-01), Williams
patent: 4961441 (1990-10-01), Salter
patent: 4974622 (1990-12-01), Rader
patent: 5020564 (1991-06-01), Thomas et al.
patent: 5062050 (1991-10-01), Petzold et al.
patent: 5134961 (1992-08-01), Giles et al.
patent: 5142483 (1992-09-01), Basham et al.
patent: 5285791 (1994-02-01), Smith
patent: 5404871 (1995-04-01), Goodman et al.
patent: 5423738 (1995-06-01), Robinson et al.
patent: 5434779 (1995-07-01), Vukovich et al.
patent: 5460196 (1995-10-01), Yonnet
EP 95 307760 dated, Jan. 25, 1996, European Search Report.
UK Search Report dated Feb. 22, 1995 for Priority Application No. GB 9422139.7.

Affiliated with

Also associated with

Rating

Pressure controller does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pressure controller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure controller will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1978084