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GB2018538A - Apparatus for the treatment of frequency signals - Google Patents

Apparatus for the treatment of frequency signals

Info

Publication number
GB2018538A
GB2018538A GB7911175A GB7911175A GB2018538A GB 2018538 A GB2018538 A GB 2018538A GB 7911175 A GB7911175 A GB 7911175A GB 7911175 A GB7911175 A GB 7911175A GB 2018538 A GB2018538 A GB 2018538A
Authority
GB
United Kingdom
Prior art keywords
frequency
phase
locked loop
treatment
frequency signals
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.)
Granted
Application number
GB7911175A
Other versions
GB2018538B (en
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.)
Babcock Partner No 6 Ltd
Original Assignee
Hawker Siddeley Dynamics Engineering Ltd
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 Hawker Siddeley Dynamics Engineering Ltd filed Critical Hawker Siddeley Dynamics Engineering Ltd
Priority to GB7911175A priority Critical patent/GB2018538B/en
Publication of GB2018538A publication Critical patent/GB2018538A/en
Application granted granted Critical
Publication of GB2018538B publication Critical patent/GB2018538B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01P3/489—Digital circuits therefor
    • 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

Landscapes

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

Abstract

A pulse frequency measuring system is provided for determining shaft speed by measurement of the frequency of pulses generated by a toothed wheel 1 on the shaft and a co-operating stationary pick-off probe 2. The pulses are shaped and multiplied in frequency by a phase-locked loop before being applied to the counters and associated logic of a frequency measuring unit 6 which in turn applies its output to a digital processing system 7. The phase-locked loop has a feedback channel including a binary divider 5. <IMAGE>
GB7911175A 1978-04-05 1979-03-30 Apparatus for the treatment of frequency signals Expired GB2018538B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7911175A GB2018538B (en) 1978-04-05 1979-03-30 Apparatus for the treatment of frequency signals

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1325978 1978-04-05
GB7911175A GB2018538B (en) 1978-04-05 1979-03-30 Apparatus for the treatment of frequency signals

Publications (2)

Publication Number Publication Date
GB2018538A true GB2018538A (en) 1979-10-17
GB2018538B GB2018538B (en) 1982-07-28

Family

ID=26249657

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7911175A Expired GB2018538B (en) 1978-04-05 1979-03-30 Apparatus for the treatment of frequency signals

Country Status (1)

Country Link
GB (1) GB2018538B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017201002A3 (en) * 2016-05-17 2017-12-28 Allegro Microsystems, Llc Magnetic field sensors and output signal formats for a magnetic field sensor
US10495700B2 (en) 2016-01-29 2019-12-03 Allegro Microsystems, Llc Method and system for providing information about a target object in a formatted output signal

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10495700B2 (en) 2016-01-29 2019-12-03 Allegro Microsystems, Llc Method and system for providing information about a target object in a formatted output signal
WO2017201002A3 (en) * 2016-05-17 2017-12-28 Allegro Microsystems, Llc Magnetic field sensors and output signal formats for a magnetic field sensor
US10495485B2 (en) 2016-05-17 2019-12-03 Allegro Microsystems, Llc Magnetic field sensors and output signal formats for a magnetic field sensor
EP4067908A1 (en) * 2016-05-17 2022-10-05 Allegro MicroSystems, LLC Magnetic field sensors and output signal formats for a magnetic field sensor

Also Published As

Publication number Publication date
GB2018538B (en) 1982-07-28

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Legal Events

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