US3761690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Computer control of a physical system in which the magnitude and frequency of corrections are system dependent
Assignee: Universal Oil Products Co
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Filing: 1971-07-06
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Granted: 1973-09-25
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Expires: 1991-07-06
Abstract
Abstract A control system for a physical system which includes a chamber wherein the value of a desired property of the system is to be maintained within predetermined limits of deviation. There is provided regulating means connected to the chamber for regulating the value of the desired property and control means connected to said regulating means for controlling such regulation. Sensing means such as level indication devices, pressure indicating devices, temperature indicating devices, or the like, is connected to the chamber for generating a signal representative of the aforesaid value of said desired property. System control means is connected to the sensor and to the control means for receiving the signals and for generating signals for controlling said system. The system control means includes computer means for computing the change of the value of the desired property with respect to time and for determining a parameter of comparison whose value is a function of the value of said desired property. First comparator means is provided for comparing the rate of the change of the desired property with the parameter of comparison and for activating the control means in response to the comparison. Second comparator means is provided for comparing the actual value of the desired property with limits of deviation and for determining the time at which to activate the control means in response to that comparison.
Inventors
- 👤 A Pekar
- 👤 J Sayles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:11
CPC Classifications
G; G05; G05B; G05B11/00; G05B11/01; G05B11/012; G05D; G05D9/00; G05D9/12
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
230 words
A control system for a physical system wherein the value of a desired property of the system is to be maintained within predetermined limits of deviation which comprises: a. control means connected to said physical system for controlling said desired property; b. sensing means connected to said physical system for generating a signal representative of the aforesaid value of said desired property; and, c. system control means connected to said sensing means and to said control means for receiving said signal and for generating signals for controlling said system, said system control means including: 1. computer means for computing the change of the value of said desired property with respect to time and for determining a parameter of comparison whose value is a function of the value of said desired property; 2. a correction output means generating a signal proportional to the change of value of said desired property with respect to time, said correction output means being coupled with and transmitting said signal to said control means; 3. first comparator means for comparing the rate of change of the desired property with said parameter of comparison and for activating said correction output means in response to said comparison; and 4. second comparator means for comparing the actual value of the desired property with the limits of deviation and for activating said correction output means in response to said comparison.
Claim 2
Dependent Claim
230 words
A control system for a physical system wherein the value of a desired property of the system is to be maintained within predetermined limits of deviation which comprises: a. control means connected to said physical system for controlling said desired property; b. sensing means connected to said physical system for generating a signal representative of the aforesaid value of said desired property; and, c. system control means connected to said sensing means and to said control means for receiving said signal and for generating signals for controlling said system, said system control means including: 1. computer means for computing the change of the value of said desired property with respect to time and for determining a parameter of comparison whose value is a function of the value of said desired property; 2. a correction output means generating a signal proportional to the change of value of said desired property with respect to time, said correction output means being coupled with and transmitting said signal to said control means; 3. first comparator means for comparing the rate of change of the desired property with said parameter of comparison and for activating said correction output means in response to said comparison; and 4. second comparator means for comparing the actual value of the desired property with the limits of deviation and for activating said correction output means in response to said comparison.
Claim 3
Dependent Claim
36 words
a correction output means generating a signal proportional to the change of value of said desired property with respect to time, said correction output means being coupled with and transmitting said signal to said control means;
Claim 4
Dependent Claim
36 words
a correction output means generating a signal proportional to the change of value of said desired property with respect to time, said correction output means being coupled with and transmitting said signal to said control means;
Claim 5
Dependent Claim
130 words
The control system of claim 1 wherein said first comparator means includes means to determine whether the computed change of value of said desired property with respect to time is greater or less than zero, and said correction output means is adapted, in an alternative mode, to generate a signal proportional to the computed change of value of said desired property with respect to time and including a component to reverse the trend of the value, said first and second comparator means cooperating to activate said correction output means in said alternative mode when the value of said desired property lies beyond said limits and when the computed change of value of said desired property with respect to time indicates that said value will continue to depart from said limits.
Claim 6
Dependent Claim
15 words
The control system of claim 1 wherein the desired property comprises the level of material.
Claim 7
Dependent Claim
31 words
first comparator means for comparing the rate of change of the desired property with said parameter of comparison and for activating said correction output means in response to said comparison; and
Claim 8
Dependent Claim
31 words
first comparator means for comparing the rate of change of the desired property with said parameter of comparison and for activating said correction output means in response to said comparison; and
Claim 9
Dependent Claim
29 words
second comparator means for comparing the actual value of the desired property with the limits of deviation and for activating said correction output means in response to said comparison.
Claim 10
Dependent Claim
29 words
second comparator means for comparing the actual value of the desired property with the limits of deviation and for activating said correction output means in response to said comparison.
Claim 11
Dependent Claim
16 words
The control system of claim 1 wherein the desired property comprises the temperature of the materials.
Claim 12
Dependent Claim
16 words
The control system of claim 1 wherein the desired property comprises the pressure of the material.
Claim 13
Dependent Claim
16 words
The control system of claim 1 wherein the desired property comprises the chemical composition of material.
Claim 14
Dependent Claim
19 words
The control system of claim 1 wherein the desired property comprises the rate of change of level of material.
Claim 15
Dependent Claim
19 words
The control system of claim 1 wherein the desired property comprises the rate of change of temperature of material.
Claim 16
Dependent Claim
19 words
The control system of claim 1 wherein the desired property comprises the rate of change of pressure of material.
Claim 17
Dependent Claim
19 words
The control system of claim 1 wherein the desired property comprises the rate of change of composition of material.
References Cited (Backward Citations)
US3582629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |