GB1248803A - Control apparatus - Google Patents
Control apparatusInfo
- Publication number
- GB1248803A GB1248803A GB5704/69A GB570469A GB1248803A GB 1248803 A GB1248803 A GB 1248803A GB 5704/69 A GB5704/69 A GB 5704/69A GB 570469 A GB570469 A GB 570469A GB 1248803 A GB1248803 A GB 1248803A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- control
- digital
- converter
- condition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B15/00—Systems controlled by a computer
- G05B15/02—Systems controlled by a computer electric
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
- G05B11/32—Automatic controllers electric with inputs from more than one sensing element; with outputs to more than one correcting element
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1917—Control of temperature characterised by the use of electric means using digital means
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/22—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element being a thermocouple
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- General Engineering & Computer Science (AREA)
- Feedback Control In General (AREA)
Abstract
1,248,803. Selective signalling. OWENSCORNING FIBERGLAS CORP. 3 Feb., 1969, No. 5704/69. Heading G4H. [Also in Division G3] Apparatus for linking a data processing unit with a condition to be controlled, includes means for converting an input signal indicating the status of the condition to a data signal, and for transmitting the data signal to the data processing unit, and for receiving and storing an information signal from the latter and generating a control signal in response to it, means for generating an independent back-up signal, means for comparing the back-up and control signals, means for adjusting the back-up signal to enable transfers between back-up and control signals without substantially disturbing the condition being controlled, and means for selecting one of these two signals to control the condition. A digital computer, controlling a process in accordance with a programme, receives the outputs of thermocouples, selected by a multiplexer, amplified, and digitized in an analogueto-digital converter, and produces digital control signals which are converted to analogue form in a first digital to analogue converter and if the converter output, amplified and stored, agrees with the converter input, the converter output is passed by the multiplexer to a selected capacitor store. If they do not agree, a second digital to analogue converter is switched in as a replacement (this also has similar checking arrangements), or a lamp may be lit to warn the operator to switch in the replacement. The outputs of the two digital to analogue converters can also be compared as a check. Each capacitor store can control a respective valve positioner via a field-effect transistor and a 4-position multi-bank switch. This switch selects either the capacitor or a back-up signal generator (comprising a potentiometer and a transistor) to control the valve positioner, and also either of them to feed a meter to indicate the control signal magnitude. A lamp is lit when the backup signal generator is in control of the valve positioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5704/69A GB1248803A (en) | 1969-02-03 | 1969-02-03 | Control apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5704/69A GB1248803A (en) | 1969-02-03 | 1969-02-03 | Control apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1248803A true GB1248803A (en) | 1971-10-06 |
Family
ID=9801073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5704/69A Expired GB1248803A (en) | 1969-02-03 | 1969-02-03 | Control apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1248803A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2431117A1 (en) * | 1978-07-10 | 1980-02-08 | Northrop Corp | INERTIAL INSTRUMENT WITH MULTIPLEX REBALANCING NETWORK |
-
1969
- 1969-02-03 GB GB5704/69A patent/GB1248803A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2431117A1 (en) * | 1978-07-10 | 1980-02-08 | Northrop Corp | INERTIAL INSTRUMENT WITH MULTIPLEX REBALANCING NETWORK |
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