GB1182027A - Improvements in or relating to tachometer circuits - Google Patents

Improvements in or relating to tachometer circuits

Info

Publication number
GB1182027A
GB1182027A GB2782268A GB2782268A GB1182027A GB 1182027 A GB1182027 A GB 1182027A GB 2782268 A GB2782268 A GB 2782268A GB 2782268 A GB2782268 A GB 2782268A GB 1182027 A GB1182027 A GB 1182027A
Authority
GB
United Kingdom
Prior art keywords
circuit
periodic signal
pulses
frequency
periodic
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
GB2782268A
Inventor
Michael Derek Culpan
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.)
Rolls Royce PLC
Original Assignee
Rolls Royce PLC
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 Rolls Royce PLC filed Critical Rolls Royce PLC
Priority to GB2782268A priority Critical patent/GB1182027A/en
Priority to DE19691929496 priority patent/DE1929496A1/en
Priority to FR6919577A priority patent/FR2010785A1/fr
Publication of GB1182027A publication Critical patent/GB1182027A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
    • G01R23/15—Indicating that frequency of pulses is either above or below a predetermined value or within or outside a predetermined range of values, by making use of non-linear or digital elements (indicating that pulse width is above or below a certain limit)
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/482—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by nuclear radiation detectors

Landscapes

  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Cardiology (AREA)
  • General Physics & Mathematics (AREA)
  • Medical Informatics (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Biophysics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Pathology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Nonlinear Science (AREA)
  • Physiology (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

1,182,027. Frequency discriminators. ROLLSROYCE Ltd. 12 June, 1968, No. 27822/68. Heading H3A. [Also in Division G1] A circuit for detecting a periodic frequency fluctuation superimposed on a randomly distributed train of pulses comprises a leaky integrator producing a corresponding periodic signal, means generating first and second signals when the periodic signal exceeds a first voltage and falls below a second voltage respectively and a circuit responsive to the first and second signals to produce a pulse for each cycle of the periodic signal. The train of pulses is applied through an input amplifier 50, Fig. 3, to a monostable pulse shaper circuit 52 having a time constant controlled by RV1. The shaped pulses are passed by an emitter follower 54 to a diode pump circuit 56 which produces a periodic signal with a ripple on it due to the arrival of individual pulses. The periodic signal is fed through a Darlington connected emitter follower 58 to Schmitt trigger circuits 60, 62 with their levels (adjustable by RV3 and RV4) set farther apart than the amplitude of the ripple. The negative pulse produced at the collector of TR9 as the periodic signal rises above the first level sets the bi-stable circuit 68, and the negative pulse produced at the collector of TR12 as the periodic signal falls below the second (lower) level resets circuit 68. Circuit 68 thus produces pulses at the frequency of the periodic frequency variation of the pulses applied to amplifier 50. Tachometer.-The rotational speed of a turbine shaft 14, Fig. 1, is measured by irradiating one of the bearing rollers 20a to make it gamma active. The output of a scintillation counter 22 is passed through a noise-reducing pulse height selector 30 to a circuit 34 as described above to obtain a pulse signal the frequency of which indicates the turbine speed. This signal is applied to a ratemeter 30 and oscilloscope 42 and to a counter/timer 40 and printer 44.
GB2782268A 1968-06-12 1968-06-12 Improvements in or relating to tachometer circuits Expired GB1182027A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB2782268A GB1182027A (en) 1968-06-12 1968-06-12 Improvements in or relating to tachometer circuits
DE19691929496 DE1929496A1 (en) 1968-06-12 1969-06-11 Detector circuit
FR6919577A FR2010785A1 (en) 1968-06-12 1969-06-12

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2872268 1968-06-12
GB2782268A GB1182027A (en) 1968-06-12 1968-06-12 Improvements in or relating to tachometer circuits

Publications (1)

Publication Number Publication Date
GB1182027A true GB1182027A (en) 1970-02-25

Family

ID=26259017

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2782268A Expired GB1182027A (en) 1968-06-12 1968-06-12 Improvements in or relating to tachometer circuits

Country Status (3)

Country Link
DE (1) DE1929496A1 (en)
FR (1) FR2010785A1 (en)
GB (1) GB1182027A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2178844A (en) * 1985-07-13 1987-02-18 Penny Turbines Ltd Noel A fuel control system for a gas turbine engine
GB2179519A (en) * 1977-09-16 1987-03-04 Zeiss Stiftung Detecting helicopters
GB2188500A (en) * 1986-03-29 1987-09-30 Fichtel & Sachs Ag Frequency switch
WO1992021035A1 (en) * 1991-05-21 1992-11-26 Prüftechnik Dieter Busch AG Opto-electronic sensor arrangement and process for determining the rotation speed and relative position of rotating devices

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3019293B1 (en) 2014-03-27 2018-07-13 Safran Aircraft Engines METHOD FOR MEASURING THE KINEMATICS OF AT LEAST ONE TURBOMACHINE ROTOR

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2179519A (en) * 1977-09-16 1987-03-04 Zeiss Stiftung Detecting helicopters
GB2178844A (en) * 1985-07-13 1987-02-18 Penny Turbines Ltd Noel A fuel control system for a gas turbine engine
GB2188500A (en) * 1986-03-29 1987-09-30 Fichtel & Sachs Ag Frequency switch
US4746820A (en) * 1986-03-29 1988-05-24 Fichtel & Sachs Ag Pulse frequency responsive switch
GB2188500B (en) * 1986-03-29 1990-04-04 Fichtel & Sachs Ag Pulse frequency responsive switch
WO1992021035A1 (en) * 1991-05-21 1992-11-26 Prüftechnik Dieter Busch AG Opto-electronic sensor arrangement and process for determining the rotation speed and relative position of rotating devices

Also Published As

Publication number Publication date
FR2010785A1 (en) 1970-02-20
DE1929496A1 (en) 1969-12-18

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