Process monitoring and control arrangement
Abstract
Abstract A SWITCHING OPERATON IN A PHYSICAL PROCESS IS CONTROLLED BY MONITORING AN ACTUAL VALUE PARAMETER OF THE PROCESS WHICH IS PRESENT IN THE FORM OF A VARIABLE FREQUENCY SIGNAL. THE FREQUENCY OF THE VARIABLE FREQUENCY SIGNAL IS PERIODICALLY MEASURED WITHIN GIVEN MEASURING PERIODS BY MEANS OF A DIGITAL FREQUENCY METER AND THE VALUE MEASURED DURING THE INTITIAL MEASURING PERIOD IS COMPARED WITH EACH OF THE VALUES MEASURED DURING THE SUBSEQUENT MEASURING PERIODS. WHENEVER THE DIFFERENCE BETWEEN THE TWO COMPARED VALUES REACHES A PREDETERMINED VALUE A CONTROL SIGNAL IS INITIATED WHICH MAY BE UTILIZED TO CONTROL THE SWITCHING OPERATION OF THE PROCESS. ACCORDING TO A PREFERRED EMBODIMENT OF THE INVENTION THE CONTROL SIGNAL IS INITIATED WHENEVER THE SUBSEQUENTLY MEASURED VALUE IS AT LEAST EQUAL TO THE INITIALLY STORED VALUE AND IS UTILIZED TO GATE THE VARIABLE FREQUENCY SIGNAL REPRESENTATIVE OF THE ACTUAL VALUE PARAMETER TO A FURTHER DIGITAL FREQUENCY METER. THE MEASURED OUTPUT VALUE OF THIS FURTHER DIGITAL FREQUENCY METER IS THEN COMPARED WITH A GIVEN FIXED REFERENCE VALUE TO INITIATE A CONTROL SIGNAL FOR THE SWITCHING OPERATION OF THE PROCESS WHENEVER THE MEASURED VALUE IS EQUAL TO OR EXCEEDS THE FIXED VALUE.
Inventors
- 👤 I Wilmanns
- 👤 A Barz
Bibliographic Details
Claims Analysis
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |