GB849520A - Photo-electric scanning device for determining the speed and direction of rotation of a shaft - Google Patents

Photo-electric scanning device for determining the speed and direction of rotation of a shaft

Info

Publication number
GB849520A
GB849520A GB673/59A GB67359A GB849520A GB 849520 A GB849520 A GB 849520A GB 673/59 A GB673/59 A GB 673/59A GB 67359 A GB67359 A GB 67359A GB 849520 A GB849520 A GB 849520A
Authority
GB
United Kingdom
Prior art keywords
photo
rotation
transformer
shaft
points
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
GB673/59A
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.)
Landis and Gyr AG
Original Assignee
Landis and Gyr AG
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 Landis and Gyr AG filed Critical Landis and Gyr AG
Publication of GB849520A publication Critical patent/GB849520A/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
    • G01P13/00—Indicating or recording presence, absence, or direction, of movement
    • G01P13/02—Indicating direction only, e.g. by weather vane
    • G01P13/04—Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement
    • G01P13/045—Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement with speed indication
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/36—Forming the light into pulses
    • G01D5/363—Direction discrimination
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/22—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral
    • H03K5/26—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral the characteristic being duration, interval, position, frequency, or sequence

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Optical Transform (AREA)

Abstract

849,520. Photo-electric devices. LANDIS & GYR A. G. Jan. 7, 1959 [Jan. 8, 1958], No. 673/59. Class 40(3). [Also in Group XL(c)] The speed and direction of rotation of a shaft, e.g. in an electricity meter, are ascertained by apparatus comprising two bistable multivibrators, each having two photo-electrically controlled electronic devices, preferably photo-transistors, the output points of corresponding electronic devices of the two multivibrators being connected by circuits including a resistor, a diode, and the primary winding of a transformer, and the photo-sensitive members associated with the devices being sequentially exposed to a beam of light at a frequency determined by the speed of the shaft, and in an order determined by the direction of rotation. Pulses are produced at one transformer or the other, according to the direction of rotation, at a frequency indicative of the rotary speed. As shown, pairs of phototransistors 1, 2, and 3, 4, are allocated to two multivibrators, and are illuminated by a beam of light parallel to the test shaft 11, in the sequence 1, 3, 4, 2, or the reverse, according to the direction of rotation of disc 12, having slots 13 and being mounted on the shaft 11. Output potentials appear at points A, B, C, D, and points A and C are interconnected by a circuit comprising a resistor R5, a diode G1, and the primary winding of a transformer T1; points B and D are interconnected by a similar circuit. When the disc 11 is rotated in the direction a, point A, as alternate photo-transistors are illuminated, becomes positive with respect to point C, and a train of pulses is produced in the secondary of transformer T1; simultaneously, point D becomes positive with respect to point B but diode G2 prevents an output from transformer T2. When the disc 12 is rotated in the reverse direction r, the pulses appear at T2, the output of Tl being zero.
GB673/59A 1958-01-08 1959-01-07 Photo-electric scanning device for determining the speed and direction of rotation of a shaft Expired GB849520A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH849520X 1958-01-08

Publications (1)

Publication Number Publication Date
GB849520A true GB849520A (en) 1960-09-28

Family

ID=4542160

Family Applications (1)

Application Number Title Priority Date Filing Date
GB673/59A Expired GB849520A (en) 1958-01-08 1959-01-07 Photo-electric scanning device for determining the speed and direction of rotation of a shaft

Country Status (4)

Country Link
CH (1) CH355381A (en)
FR (1) FR1211293A (en)
GB (1) GB849520A (en)
NL (2) NL103653C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2149096A (en) * 1983-10-03 1985-06-05 Sharp Kk Optical rotary displacement encoder

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3991789A (en) * 1975-03-31 1976-11-16 Dana Corporation Infinitely adjustable cyclic timing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2149096A (en) * 1983-10-03 1985-06-05 Sharp Kk Optical rotary displacement encoder

Also Published As

Publication number Publication date
CH355381A (en) 1961-06-30
NL103653C (en)
FR1211293A (en) 1960-03-15
NL233884A (en)

Similar Documents

Publication Publication Date Title
US2586540A (en) Torsion meter
GB782831A (en) Improvements relating to apparatus for measuring small movements
GB849520A (en) Photo-electric scanning device for determining the speed and direction of rotation of a shaft
GB801922A (en) Improvements in or relating to analogue to digital function converter
US2792173A (en) Function generator
SU405016A1 (en) PHOTOELECTRIC DEVICE FOR THE CONTROL OF DIAMETER DIFFUSIONS FROM A TARGETED SIZE
US3886787A (en) Method of and apparatus for measuring physical quantities of a rotating body
FR1173311A (en) Device for converting electrical signals into variations in light intensity
US3161827A (en) Electrical apparatus for successive measurement and simultaneous indication on an oscilloscope of a plurality of inputs together with a fixed refrence
SU570709A1 (en) Device for locating cutting-loading machine
SU651388A1 (en) Shaft angular position-to-code converter
SU103575A1 (en) Instrument for measuring or recording the angle of departure of the rotor of a synchronous machine
Bane et al. A simple direction-sensitive phototransistor circuit for use in optical pulse-counting systems
SU536439A1 (en) Voltage measurement method
SU523372A1 (en) A device for determining the quality of cores made of magnetic materials
FR1226403A (en) Advanced electrical signal generators
SU610291A1 (en) Voltage comparator
GB871357A (en) Improvements in or relating to torque measuring apparatus
SU403097A1 (en) INPUT TELEGRAPH MEASURING DEVICE
GB1284182A (en) Electrophotography
SU474027A1 (en) Device for registering cartographic information
JPS5223372A (en) Mintur measuring instrument
SU551576A1 (en) Device for monitoring pulse parameters of magnetic cores
SU1089411A2 (en) Photoelectric displacement pickup
GB633079A (en) Improvements in and relating to multiple trace recording devices