GB918747A - Computer-controller set point system - Google Patents

Computer-controller set point system

Info

Publication number
GB918747A
GB918747A GB12836/61A GB1283661A GB918747A GB 918747 A GB918747 A GB 918747A GB 12836/61 A GB12836/61 A GB 12836/61A GB 1283661 A GB1283661 A GB 1283661A GB 918747 A GB918747 A GB 918747A
Authority
GB
United Kingdom
Prior art keywords
computer
controller
analogue
output
april
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
Application number
GB12836/61A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schneider Electric Systems USA Inc
Original Assignee
Foxboro Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US23055A external-priority patent/US3034718A/en
Application filed by Foxboro Co filed Critical Foxboro Co
Publication of GB918747A publication Critical patent/GB918747A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • 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
    • G05B11/26—Automatic controllers electric in which the output signal is a pulse-train
    • G05B11/28—Automatic controllers electric in which the output signal is a pulse-train using pulse-height modulation; using pulse-width modulation
    • 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
    • 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
    • G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
    • G05D23/1913—Control of temperature characterised by the use of electric means using an analogue comparing device delivering a series of pulses
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/48—Servo-type converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Feedback Control In General (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

918,747. Programmed electric control systems. FOXBORO CO. April 10, 1961 [April 18, 1960], No. 12836/61. Class 38 (6). An apparatus to determine a desired datum for an analogue controller from the output of a digital computer comprises means for translating the computer output to pulse width analogue terms and means responsive to these terms to position the controller to a corresponding setting. The flow along a pipe 11 is controlled by a valve 14 adjusted by an analogue controller 12 in accordance with the output from a flowmeter 13. The equilibrium point of the controller 12 is set by a set point station 26 which determines the flowrate according to signals fed into a B.T.U. digital computer 21 from a process which measures the temperature difference at 18, 19 and flowrate at 20 of another fluid through a pipe 15, and additionally from other processes which may be part of the apparatus. The computer 21 may be shared on a time basis with other stations by suitable switching means (not shown). A switch with one or more transitional stages may be incorporated to provide manual control of the process. A feed-back line 22 with analogue to digital conversion is provided to detect any error between desired and actual output conditions. The computer may be controlled by a programme recorded on punched cards or other means.
GB12836/61A 1960-04-18 1961-04-10 Computer-controller set point system Expired GB918747A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US23055A US3034718A (en) 1960-04-18 1960-04-18 Computer-controller set point system

Publications (1)

Publication Number Publication Date
GB918747A true GB918747A (en) 1963-02-20

Family

ID=21812874

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12836/61A Expired GB918747A (en) 1960-04-18 1961-04-10 Computer-controller set point system

Country Status (3)

Country Link
DE (1) DE1302216C2 (en)
GB (1) GB918747A (en)
NL (1) NL263760A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014116945A1 (en) * 2013-01-25 2014-07-31 Fisher Controls International Llc Methods and apparatus to interface with a digital control loop

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3909041A1 (en) * 1989-03-18 1990-09-20 Bosch Gmbh Robert CONTROL ARRANGEMENT

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014116945A1 (en) * 2013-01-25 2014-07-31 Fisher Controls International Llc Methods and apparatus to interface with a digital control loop
CN103970082A (en) * 2013-01-25 2014-08-06 费希尔控制国际公司 Methods and apparatus to interface with a digital control loop
US9665076B2 (en) 2013-01-25 2017-05-30 Fisher Controls International Llc Methods and apparatus to interface with a digital control loop
RU2655176C2 (en) * 2013-01-25 2018-05-24 Фишер Контролз Интернешнел Ллс Methods and apparatus to interface with digital control loop
CN103970082B (en) * 2013-01-25 2019-03-22 费希尔控制国际公司 For the method and apparatus with digital control loop interface
EP2948822B1 (en) * 2013-01-25 2019-12-04 Fisher Controls International Llc Methods and apparatus to interface with a digital control loop

Also Published As

Publication number Publication date
NL263760A (en) 1900-01-01
DE1302216B (en) 1971-01-07
DE1302216C2 (en) 1976-08-19

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