US4580208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
PID controlling meter
Assignee: Omron Corp
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Filing: 1983-07-01
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Granted: 1986-04-01
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Expires: 2003-07-01
Abstract
Abstract A PID controlling meter is provided with unit for displaying an amount of operation representing the sum total of the bias constant and the operation result of three terms, i.e., a proportional term, an integrating term and differentiating term each of which is a function of deviation. The meter also has a constant setting unit for setting displayed amount of operation as a control parameter; unit for displaying set values of the constant setting a unit; a unit for reading the set values of the constant setting unit when a power source is closed; and a unit for determining bias constant when the power source is closed on the basis of the constant set values read by the reading unit.
Inventors
- 👤 Yasuyuki Sukimoto
- 👤 Toshiaki Nagao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:56
CPC Classifications
G; G05; G05B; G05B5/00; G05B5/01; G05B15/00; G05B15/02; G05B7/00; G05B7/02; G05D; G05D23/00; G05D23/19; G05D23/1917; G05D23/20; G05D23/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
131 words
A PID controlling meter comprising (a) means for displaying an amount of operation comprising a sum of a first bias constant and an operation result of three terms, said three terms being a proportional term, an integrating term and a differentiating term each being a function of deviation; (b) a second constant setting unit; (c) means for displaying set values of said second constant setting unit; (d) means for reading set values of said second constant setting unit when a power source is closed; and (e) means for setting said bias constant based on set values read by said reading means, wherein a unit of set values of said second constant setting unit is the same as a unit of numerals displayed by said means for displaying an amount of operation.
Claim 2
Dependent Claim
131 words
A PID controlling meter comprising (a) means for displaying an amount of operation comprising a sum of a first bias constant and an operation result of three terms, said three terms being a proportional term, an integrating term and a differentiating term each being a function of deviation; (b) a second constant setting unit; (c) means for displaying set values of said second constant setting unit; (d) means for reading set values of said second constant setting unit when a power source is closed; and (e) means for setting said bias constant based on set values read by said reading means, wherein a unit of set values of said second constant setting unit is the same as a unit of numerals displayed by said means for displaying an amount of operation.
Claim 3
Dependent Claim
20 words
The PID controlling meter according to claim 1 wherein said second constant setting unit comprises an analog amount setting unit.
Claim 4
Dependent Claim
20 words
The PID controlling meter according to claim 1 wherein said second constant setting unit comprises a digital amount setting unit.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-31 | 1989-09-30 | 1990-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-31 | 1993-09-30 | 1994-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-31 | 1997-09-30 | 1998-04-01 | $7700.00 | Window Closed / Lapsed |