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1. WO2020115464 - ENCODER APPARATUS

Publication Number WO/2020/115464
Publication Date 11.06.2020
International Application No. PCT/GB2019/053407
International Filing Date 03.12.2019
IPC
G01D 5/14 2006.01
GPHYSICS
01MEASURING; TESTING
DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED BY A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; TRANSFERRING OR TRANSDUCING ARRANGEMENTS NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
5Mechanical 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
12using electric or magnetic means
14influencing the magnitude of a current or voltage
G01D 5/244 2006.01
GPHYSICS
01MEASURING; TESTING
DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED BY A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; TRANSFERRING OR TRANSDUCING ARRANGEMENTS NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
5Mechanical 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
12using electric or magnetic means
244influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
CPC
G01D 5/145
GPHYSICS
01MEASURING; TESTING
DMEASURING 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
5Mechanical 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
12using electric or magnetic means
14influencing the magnitude of a current or voltage
142using Hall-effect devices
145influenced by the relative movement between the Hall device and magnetic fields
G01D 5/24471
GPHYSICS
01MEASURING; TESTING
DMEASURING 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
5Mechanical 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
12using electric or magnetic means
244influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
24471Error correction
G01D 5/2451
GPHYSICS
01MEASURING; TESTING
DMEASURING 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
5Mechanical 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
12using electric or magnetic means
244influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
245using a variable number of pulses in a train
2451Incremental encoders
G01D 5/2457
GPHYSICS
01MEASURING; TESTING
DMEASURING 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
5Mechanical 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
12using electric or magnetic means
244influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
245using a variable number of pulses in a train
2454Encoders incorporating incremental and absolute signals
2455with incremental and absolute tracks on the same encoder
2457Incremental encoders having reference marks
Applicants
  • RENISHAW PLC [GB]/[GB]
Inventors
  • HOWLEY, Colin, Keith
  • MCADAM, Simon, Eliot
  • WHITING, Adam, Michael
Agents
  • ROLFE, Edward, William
  • DUNN, Paul, Edward
  • MATTHEWS, Paul
  • BREWER, Michael, Robert
  • PHILLIPS, Patrick, James
Priority Data
18210257.404.12.2018EP
1902306.820.02.2019GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) ENCODER APPARATUS
(FR) APPAREIL DE CODAGE
Abstract
(EN)
An incremental encoder apparatus comprising: a scale comprising a series of periodic features defining an optical incremental scale, and at least one magnetic reference mark; and a readhead. The readhead comprises at least one incremental sensor configured to detect light from the optical incremental scale and to output at least one signal dependent thereon, and at least two analogue Hall sensors, each comprising at least two output terminal pairs, and each configured to switch repeatedly between each output terminal pair so as to reduce any inherent offset in the output of the analogue Hall sensor. The apparatus is configured to determine the presence of the reference mark from the outputs of the at least two analogue Hall sensors.
(FR)
L'invention concerne un appareil de codage incrémental comprenant : une échelle dotée d'une série de caractéristiques périodiques définissant une échelle incrémentielle optique, et au moins une marque de référence magnétique ; et une tête de lecture. La tête de lecture comprend au moins un capteur incrémentiel configuré pour détecter la lumière provenant de l'échelle incrémentielle optique et pour délivrer au moins un signal dépendant de celle-ci, et au moins deux capteurs à effet Hall analogiques comprenant chacun au moins deux paires de bornes de sortie, et chacun étant configuré pour commuter de manière répétée entre chaque paire de bornes de sortie de façon à réduire tout décalage inhérent dans la sortie du capteur à effet Hall analogique. L'appareil est configuré pour déterminer la présence de la marque de référence à partir des sorties d'au moins deux capteurs à effet Hall analogiques.
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