GB2013896A - A tachometer arrangement - Google Patents

A tachometer arrangement

Info

Publication number
GB2013896A
GB2013896A GB7905625A GB7905625A GB2013896A GB 2013896 A GB2013896 A GB 2013896A GB 7905625 A GB7905625 A GB 7905625A GB 7905625 A GB7905625 A GB 7905625A GB 2013896 A GB2013896 A GB 2013896A
Authority
GB
United Kingdom
Prior art keywords
tachometer
signal
counter
computing device
count
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
GB7905625A
Other versions
GB2013896B (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.)
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 GB7905625A priority Critical patent/GB2013896B/en
Publication of GB2013896A publication Critical patent/GB2013896A/en
Application granted granted Critical
Publication of GB2013896B publication Critical patent/GB2013896B/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
    • G01P1/00—Details of instruments
    • G01P1/07—Indicating devices, e.g. for remote indication
    • G01P1/08—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers
    • G01P1/10—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

A tachometer arrangement comprises a first counter 19 adapted to count the cycles of an input tachometer signal, a second counter 21 adapted to count the cycles of a clock frequency, trigger means adapted to produce a trigger signal when the second counter 21 reaches a predetermined count, a logic device (18) adapted to receive the signal from the trigger means, to cause the counters to pass their period counts to data latches 24, 25 upon the completion of the next tachometer signal cycle after receipt of the trigger signal, and to reset the counters immediately, a computing device 23 being provided which is adapted to perform a calculation on the stored information in the data latches 24, 25 and to produce an output indicative of the rotational speed implied thereby. The trigger means may form part of the computing device 23. The tachometer comprises a transducer which co-operates with a magnetised marker on a rotating shaft (Figure 1, not shown). The shaft is driven by an electric motor and the computing device may be programmed by thumb wheel switches 26, 27, 28 to cut off the supply of electricity to the motor at a predetermined speed. <IMAGE>
GB7905625A 1978-02-01 1979-02-16 Tachometer and electrical circuit therefore Expired GB2013896B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7905625A GB2013896B (en) 1978-02-01 1979-02-16 Tachometer and electrical circuit therefore

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB400278 1978-02-01
GB7905625A GB2013896B (en) 1978-02-01 1979-02-16 Tachometer and electrical circuit therefore

Publications (2)

Publication Number Publication Date
GB2013896A true GB2013896A (en) 1979-08-15
GB2013896B GB2013896B (en) 1982-04-28

Family

ID=26238749

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7905625A Expired GB2013896B (en) 1978-02-01 1979-02-16 Tachometer and electrical circuit therefore

Country Status (1)

Country Link
GB (1) GB2013896B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0078854A1 (en) * 1981-05-18 1983-05-18 Fanuc Ltd. Speed detecting device
EP0090717A1 (en) * 1982-03-22 1983-10-05 Allied Corporation Speed measurement system
DE3620350A1 (en) * 1985-10-04 1987-04-09 Mitsubishi Electric Corp DEVICE FOR MEASURING THE SPEED OF A ROTATING PART
EP0288683A2 (en) * 1987-03-16 1988-11-02 Digitron AG Method and circuit for digital rotation speed measurement
FR2634896A3 (en) * 1988-07-28 1990-02-02 Siderurgie Fse Inst Rech Method and device for measuring the average speed of rotation within a time interval, and applications to rolling mills
AT1407U1 (en) * 1992-05-18 1997-04-25 Elin Energieversorgung METHOD FOR DETERMINING CHARACTERISTICS OF A ROTATING MACHINE
WO1998022826A1 (en) * 1996-11-20 1998-05-28 Philips Electronics N.V. A digital tachometer
CN115355099A (en) * 2022-08-31 2022-11-18 中船动力研究院有限公司 Diesel engine overspeed protection device and diesel engine

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0078854A1 (en) * 1981-05-18 1983-05-18 Fanuc Ltd. Speed detecting device
EP0078854A4 (en) * 1981-05-18 1983-09-22 Fanuc Ltd Speed detecting device.
EP0090717A1 (en) * 1982-03-22 1983-10-05 Allied Corporation Speed measurement system
US4485452A (en) * 1982-03-22 1984-11-27 The Bendix Corporation Speed measurement system
DE3620350A1 (en) * 1985-10-04 1987-04-09 Mitsubishi Electric Corp DEVICE FOR MEASURING THE SPEED OF A ROTATING PART
EP0288683A2 (en) * 1987-03-16 1988-11-02 Digitron AG Method and circuit for digital rotation speed measurement
EP0288683A3 (en) * 1987-03-16 1989-03-22 Jd-Technologie Ag Method and circuit for digital rotation speed measurement
FR2634896A3 (en) * 1988-07-28 1990-02-02 Siderurgie Fse Inst Rech Method and device for measuring the average speed of rotation within a time interval, and applications to rolling mills
AT1407U1 (en) * 1992-05-18 1997-04-25 Elin Energieversorgung METHOD FOR DETERMINING CHARACTERISTICS OF A ROTATING MACHINE
WO1998022826A1 (en) * 1996-11-20 1998-05-28 Philips Electronics N.V. A digital tachometer
CN115355099A (en) * 2022-08-31 2022-11-18 中船动力研究院有限公司 Diesel engine overspeed protection device and diesel engine
CN115355099B (en) * 2022-08-31 2024-04-19 中船动力研究院有限公司 Overspeed protection device of diesel engine and diesel engine

Also Published As

Publication number Publication date
GB2013896B (en) 1982-04-28

Similar Documents

Publication Publication Date Title
US3564219A (en) Indicating device
ES8206173A1 (en) Dishwasher with a control device for monitoring the rotation of the spray arms.
GB2013896A (en) A tachometer arrangement
SE8602352D0 (en) DEVICE FOR DETECTING THE ANGULAR SPEED OF AN ROTATING ELEMENT
GB1265327A (en)
US4179656A (en) Determination of average speed of rotation of a cyclically loaded shaft during periods of up to two minutes duration
GB816971A (en) Improvements in or relating to high speed printers
FR2423786A1 (en) TACHOMETER CONTROLLED BY AN ELECTRIC MOTOR
JPS562582A (en) Analog type electronic watch
JPS55112607A (en) Numeral control unit
JPS5587985A (en) Counting device
JPS5775584A (en) Motor controlling circuit
JPS5548869A (en) Detection circuit for record size
GB1322869A (en) Memory circuit
SU1580186A1 (en) Apparatus for measuring energy of impact
JPS5619475A (en) Electronic timepiece with battery life display
JPS5520467A (en) Analogue electronic stop watch
RU96119681A (en) ELECTRONIC COUNTER OF TIME OF WORK OF THE RUNNING SYSTEM
ES341836A1 (en) Improvements in and relating to tachogenerators
JPS5532197A (en) Position servo device
JPS52102767A (en) Operation indicating apparatus for two-hand type electronic timepiece
SU462807A1 (en) A device for controlling a moving glass belt
JPS54108614A (en) Count display system
JPS6114375U (en) engine tachometer
JPS5535164A (en) Measuring device for controlling engine

Legal Events

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