GB1347261A - Method and apparatus for measuring the mass transfer rate of material passing through a pump - Google Patents

Method and apparatus for measuring the mass transfer rate of material passing through a pump

Info

Publication number
GB1347261A
GB1347261A GB1347261DA GB1347261A GB 1347261 A GB1347261 A GB 1347261A GB 1347261D A GB1347261D A GB 1347261DA GB 1347261 A GB1347261 A GB 1347261A
Authority
GB
United Kingdom
Prior art keywords
pulse train
frequency
input signal
error signal
pulses counted
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
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.)
Pharmacia and Upjohn Co
Original Assignee
Upjohn 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
Application filed by Upjohn Co filed Critical Upjohn Co
Publication of GB1347261A publication Critical patent/GB1347261A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/07—Integration to give total flow, e.g. using mechanically-operated integrating mechanism
    • G01F15/075—Integration to give total flow, e.g. using mechanically-operated integrating mechanism using electrically-operated integrating means
    • G01F15/0755—Integration to give total flow, e.g. using mechanically-operated integrating mechanism using electrically-operated integrating means involving digital counting

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)

Abstract

1347261 Automatic frequency control UPJOHN CO 14 Sept 1970 43844/70 Heading H3A [Also in Divisions G1 and G4] An output signal is produced by generating a pulse train, counting the number of pulses in the train during a time interval dependent upon a variable input signal frequency, and varying the frequency of the pulse train in dependence upon the number of pulses counted in the interval. The time interval may be the period of the input signal. The frequency of the pulse train is varied (as shown) by comparing (86) the pulses counted with a pre-set number (84) and generating an error signal if the pulses counted (88) differ from the pre-set number. The error signal is produced by registering a number (66) whose sign and magnitude represent the difference, and converting the registered number to analogue form for control of the pulse generator (90). The output pulse train may be caused to be zero whenever the input signal falls below a certain value, by adding a selected voltage to the error signal (78).
GB1347261D 1970-09-17 1970-09-17 Method and apparatus for measuring the mass transfer rate of material passing through a pump Expired GB1347261A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4384470 1970-09-17

Publications (1)

Publication Number Publication Date
GB1347261A true GB1347261A (en) 1974-02-27

Family

ID=10430556

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1347261D Expired GB1347261A (en) 1970-09-17 1970-09-17 Method and apparatus for measuring the mass transfer rate of material passing through a pump

Country Status (1)

Country Link
GB (1) GB1347261A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3200873A1 (en) * 1982-01-14 1983-07-21 Baldwin-Gegenheimer GmbH, 8900 Augsburg Device for measuring and displaying the consumption of a medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3200873A1 (en) * 1982-01-14 1983-07-21 Baldwin-Gegenheimer GmbH, 8900 Augsburg Device for measuring and displaying the consumption of a medium

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee