GB644807A - Improvements relating to apparatus for measuring the speed of rotation of a rotatingmember - Google Patents

Improvements relating to apparatus for measuring the speed of rotation of a rotatingmember

Info

Publication number
GB644807A
GB644807A GB2694147A GB2694147A GB644807A GB 644807 A GB644807 A GB 644807A GB 2694147 A GB2694147 A GB 2694147A GB 2694147 A GB2694147 A GB 2694147A GB 644807 A GB644807 A GB 644807A
Authority
GB
United Kingdom
Prior art keywords
cell
light
shaft
photo
speed
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
GB2694147A
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.)
Metropolitan Vickers Electrical Co Ltd
Original Assignee
Metropolitan Vickers Electrical Co 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 Metropolitan Vickers Electrical Co Ltd filed Critical Metropolitan Vickers Electrical Co Ltd
Priority to GB2694147A priority Critical patent/GB644807A/en
Publication of GB644807A publication Critical patent/GB644807A/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
    • G01P3/486—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 photo-electric detectors
    • 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
    • G01P3/4802—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage by using electronic circuits in general

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

644,807. Electric indicating systems. SCOLES, G. J., TODD, K. W., and METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. Oct. 7, 1947, No. 26941. [Class 40 (i)] [Also in Group XL (b)] In apparatus for determining the rotational speed of a member, a rotor, which rotates at a speed proportional to that of the member, controls light passing from a source to a photocell so that the cell is activated at a frequency proportional to the speed of the rotating member. As shown, light from a source 1 passes to a photo-cell 3 by way of a light guide 2 which may be of " Perspex " (Registered Trade Mark). The end of a rotating shaft 5 is cut away so that the light to the photo-cell is periodically interrupted. The shaft may also be arranged as shown in Fig. 1A so that the cell receives a pair of unequal impulses in each cycle enabling the direction of rotation of the shaft to be determined. In a further embodiment the shaft is situated at the far end of the light guide and reflect light back along it to a photocell situated beside the light source. The construction of the shaft end is shown in Fig. 3, surface 12 and 13 being reflecting and again applying different impulses to the photo-cell. The output of the photo-cell is applied to the " Y " plates of a cathode-ray tube, a known circuit arrangement providing a time base on the " X " plates. The auxiliary deflection of the trace appears at one end or the other of the trace depending on the direction of rotation of the shaft. The circuit described is a modification of that described in Specification 644,810, which may be used to measure the output frequency of the light-sensitive device.
GB2694147A 1947-10-07 1947-10-07 Improvements relating to apparatus for measuring the speed of rotation of a rotatingmember Expired GB644807A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2694147A GB644807A (en) 1947-10-07 1947-10-07 Improvements relating to apparatus for measuring the speed of rotation of a rotatingmember

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2694147A GB644807A (en) 1947-10-07 1947-10-07 Improvements relating to apparatus for measuring the speed of rotation of a rotatingmember

Publications (1)

Publication Number Publication Date
GB644807A true GB644807A (en) 1950-10-18

Family

ID=10251627

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2694147A Expired GB644807A (en) 1947-10-07 1947-10-07 Improvements relating to apparatus for measuring the speed of rotation of a rotatingmember

Country Status (1)

Country Link
GB (1) GB644807A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2470968A1 (en) * 1979-12-06 1981-06-12 Europ Propulsion Optical rotation detector for vehicle speedometer cable - uses light source and photodetector adaptor section to provide logic signals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2470968A1 (en) * 1979-12-06 1981-06-12 Europ Propulsion Optical rotation detector for vehicle speedometer cable - uses light source and photodetector adaptor section to provide logic signals

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