GB2059598A - Inductive rotational speed or position transducers - Google Patents
Inductive rotational speed or position transducers Download PDFInfo
- Publication number
- GB2059598A GB2059598A GB8031093A GB8031093A GB2059598A GB 2059598 A GB2059598 A GB 2059598A GB 8031093 A GB8031093 A GB 8031093A GB 8031093 A GB8031093 A GB 8031093A GB 2059598 A GB2059598 A GB 2059598A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tooth
- segments
- teeth
- disc
- mutually
- 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.)
- Withdrawn
Links
- 230000001939 inductive effect Effects 0.000 title claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000011017 operating method Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
- F02P7/06—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of circuit-makers or -breakers, or pick-up devices adapted to sense particular points of the timing cycle
- F02P7/067—Electromagnetic pick-up devices, e.g. providing induced current in a coil
- F02P7/0675—Electromagnetic pick-up devices, e.g. providing induced current in a coil with variable reluctance, e.g. depending on the shape of a tooth
-
- 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
- G01D5/12—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 using electric or magnetic means
- G01D5/14—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 using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/20—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 using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
- G01D5/2006—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 using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils
- G01D5/2013—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 using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils by a movable ferromagnetic element, e.g. a core
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
A transducer comprises an iron disc (S) rotatable relative to an inductive sensor (T) and having a plurality of mutually congruent segments (s) each comprising a tooth and an adjacent tooth gap, and at least one segment (S1) whose tooth (10) has a circumferential length different from that of the teeth (1 to 6) in the other mutually congruent segments, whereby rotational speed and/or angular position of a shaft can be determined. <IMAGE>
Description
SPECIFICATION
Improvements in or relating to inductive rotational speed sensor devices
The present invention relates to inductive sensor devices for detecting the rotational speed of a shaft,
It is known in a sensor device for detecting the rotational speed of a shaft, to use a disc which rotates with the shaft and whose periphery has a plurality of segments which are located one after another in the direction of rotation and each of which comprises a tooth and an adjacent tooth gap, which segments are of substantially mutually congruent construction with respect to the axial spacing of the peripheral surface of the teeth and of the tooth gaps and with respect to the width of the teeth and the tooth gaps measured in the circumferential direction.
According to the present invention an inductive sensor device for detecting the rotational speed and/or a predetermined angular position of a shaft comprises a disc which is arranged to be rotated with the shaft relatively to an inductive sensor and whose periphery has a plurality of mutually congruent segments which are located one after another in the intended direction of rotation of the disc and each of which comprises a tooth and an adjacent tooth gap, and which in a predetermined segemental region corresponding to the predetermined angular position of the shaft is provided with at least one segment whose tooth has a circumferential length different from the circumferential length of the teeth in the other mutually congruent segments.
By means of a sensor device embodying the present invention it is possible not only to detect the rotational speed of a shaft but additionally or alternatively to detect a predetermined angular position of such shaft. A sensor device embodying the present invention is eminently suitable for use in an internal combustion engine for controlling a device operating procedure such as the instant of
ignition in relation to an angular position of the
engine crankshaft.
In one embodiment of the invention one segment of the sensor disc has a tooth which is longer in the circumferential direction than the teeth in the other mutually congruent segments.
In another embodiment two mutually adjacent segments of the sensor disc have teeth which are longer in the circumferential direction than the teeth in the other mutually congruent segments.
In a further embodiment two mutually adjacent segments of the sensor disc have only a single common tooth which extends over a circumferential length which is equal to at least that of two teeth and one tooth gap in the other mutually congruent segments.
The invention will be further described by way of example with reference to the accompanying drawings, in which: Fig. 1 is an axial view of a sector, comprising approximately 800, of a sensor disc according to one embodiment of the invention,
Fig. 2 is a linear development of part of the rim
region of the sensor disc of Fig. 1,
Fig. 3 is a graph of voltage against time of a
signal generated in a sensor unit illustrated
diagrammatically integral in response to rotation
of the disc of Fig. 1,
Fig. 4 is a linear development of a part of the
rim region of a modified sensor disc according to a
second embodiment of the invention which is
otherwise not illustrated,
Fig. 5 is a graph of voltage against time of a
signal generated in a sensor unit in response to
rotation of the disc of Fig. 4,
Fig. 6 is a linear development of part of the rim
region of another sensor disc according to a third
embodiment of the invention, and
Fig. 7 is a graph of voltage against time of a
signal generated in a sensor unit in response to
rotation of the disc of Fig. 6,
A sensor disc S illustrated in Fig. 1 is punched
from magnetic material, for example, sheet iron
and its periphery is sub-divided into, for example,
36 segments s each of which extends over 1000.
Each of the segments s has one of 36 teeth of
which the teeth belonging to congruent segments
are designated 1 to 6 in Fig. 1. Furthermore, each
segment has an associated tooth gap 7 whose
base is defined by a radius r2, whilst the peripheral
surfaces of the teeth have a larger radius rl.
The disc S is mounted on a shaft (indicated at
W) of an internal combustion engine, such as the
shaft of the distributor of the engine, and, when
the disc is rotated in the direction of the arrow in
Fig. 1, the teeth of the sensor disc successively
move past an inductive sensor T and induce in a
coil 8 of the sensor T substantially sinusoidal
alternating voltage half-waves of the kind
indicated at 9 in Fig. 3.
In order to be able to associate a predetermined angular position of the sensor dise S with an
operating procedure of the internal combustion
engine, such as for the purpose of determining
the instant ignition for one of the cylinders
of the internal combustion engine, one of the
segments is marked relative to the other,
mutually congruent segments by a deviation from
the congruence, in the manner shown in Fig. 1.
This marking is achieved in that the associated tooth 10 is substantially widened in a circumferential direction in the marked segment and constitutes approximately 80% of the otherwise unchanged segment. The tooth gap 11 located in front of the widened tooth 10 is thereby shortened to a considerable extent, so that only a very weak positive half-wave 12 appears in the voltage characteristic shown in Fig. 3. This can be detected by simple means in an electronic evaluating circuit, so that it is possible to detect the marked segment from the other segments by means of the widened tooth 10 and to associate it with the desired operating procedure of the internal combustion engine.
In a disc according to a second embodiment of the invention, of which a linear development of part of the rim is shown in Fig. 4, the teeth 1 5 and 1 6 of two successive segments are widened to a considerable extent such that only a very short gap 1 7 is created between these two teeth. This short gap leads to the deformation of the voltage characteristic which is shown in Fig. 5 and by which the marked double segment can be detected.
In a disc according to a third embodiment of the invention, only a portion of the development of the rim of which is shown in Fig. 6, two segments immediately following one another are used for marking the predetermined angular position.
However, the teeth associated with these two segments are widened such that they form a single continuous tooth 1 8 such that a gap no longer exists as between the other segments. This rnsblts in the voltage characteristic which is shown in Fig. 7 and in which a positive and a negative half-wave are absent at location 1 9.
Claims (5)
1. An inductive sensor device for detecting the rotational speed and/or a pre-determined angular position of a shaft, comprising a disc which is arranged to be rotated with the shaft relatively to an inductive sensor and whose periphery has a plurality of mutually congruent segments which are located one after another in the intended direction of rotation of the disc and each of which comprises a tooth and an adjacent tooth gap, and which in a predetermined segmental region corresponding to the predetermined angular position of such shaft is provided with at least one segment whose tooth has a circumferential length different from the circumferential length of the teeth in the other mutually congruent segments.
2. An inductive sensor device as claimed in claim 1, in which two mutually adjacent segments of the sensor disc have teeth which are longer in the circumferential direction than the teeth in the other mutually congruent segments.
3. An inductive sensor device as claimed in claim 1, in which two mutually adjacent segments of the sensor disc have only a single common tooth which extends over a circumferential length which is equal to at least that of two teeth and one tooth gap in the other mutually congruent segments.
4. An inductive sensor device as claimed in claim 1, in which one segment of the sensor disc has a tooth which is longer in the circumferential direction than the teeth in the other mutually congruent segments.
5. An inductive sensor device, constructed and arranged and adapted to operate substantially as hereinbefore particularly described with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19792939643 DE2939643A1 (en) | 1979-09-29 | 1979-09-29 | INDUCTIVE SPEED OR ROTATIONAL ENCODER |
Publications (1)
Publication Number | Publication Date |
---|---|
GB2059598A true GB2059598A (en) | 1981-04-23 |
Family
ID=6082305
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8031093A Withdrawn GB2059598A (en) | 1979-09-29 | 1980-09-26 | Inductive rotational speed or position transducers |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE2939643A1 (en) |
FR (1) | FR2466775A1 (en) |
GB (1) | GB2059598A (en) |
IT (1) | IT1132795B (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0071885A2 (en) * | 1981-08-06 | 1983-02-16 | Atlas Fahrzeugtechnik GmbH | Flyweel gear pulse generator comprising a marked tooth |
FR2526953A1 (en) * | 1982-05-11 | 1983-11-18 | Citroen Sa | Magnetic detector for rotational speed and shaft position - has toothed ring with metal plate in zone where teeth are removed and uses magneto-resistive pick=up |
GB2162645A (en) * | 1984-06-29 | 1986-02-05 | Marelli Autronica | Detecting top dead centre of i.c. engine pistons |
WO1991013363A2 (en) * | 1990-02-22 | 1991-09-05 | Ford Motor Company Limited | Signal conditioning circuit |
EP0506399A1 (en) * | 1991-03-29 | 1992-09-30 | Cummins Electronics Company, Inc. | Single sensor apparatus and method for determining engine speed and position |
WO1997019358A1 (en) * | 1995-11-20 | 1997-05-29 | Orbital Engine Company (Australia) Pty. Limited | Electronic position and speed sensing device |
EP1731738A1 (en) * | 2004-04-02 | 2006-12-13 | Keihin Corporation | Crank angle detection device and ignition timing control device for internal combustion engine |
CN105675907A (en) * | 2016-03-31 | 2016-06-15 | 中国神华能源股份有限公司 | Speed measuring device, slag conveyor structure and power plant boiler |
CN105705951A (en) * | 2013-11-11 | 2016-06-22 | 通用电气公司 | Method for reducing error in rotor speed measurements |
US10234262B2 (en) | 2010-11-18 | 2019-03-19 | Continental Automotive France | Sensor for measuring angular position, and measurement compensation method |
DE102017128183A1 (en) * | 2017-11-28 | 2019-05-29 | Bdr Thermea Group B.V. | Method for controlling an internal combustion engine in a combined heat and power plant and device for detecting operating parameters of an internal combustion engine in a combined heat and power plant |
FR3129438A1 (en) * | 2021-11-25 | 2023-05-26 | Vitesco Technologies | METHOD FOR DETERMINING AN ANGULAR POSITION OF A TOOTHED TARGET |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3031357A1 (en) * | 1980-08-20 | 1982-04-08 | Robert Bosch Gmbh, 7000 Stuttgart | COMBINED INCREMENT AND REFERENCE BRAND RECOGNITION FOR A ROTATING SHAFT, IN PARTICULAR THE CRANKSHAFT OF AN INTERNAL COMBUSTION ENGINE |
AT375188B (en) * | 1982-05-12 | 1984-07-10 | List Hans | DEVICE FOR AUTOMATIC DIAGNOSIS OF A FOREIGN DRIVEN 4-STROKE INTERNAL COMBUSTION ENGINE |
DE3403150C1 (en) * | 1984-01-31 | 1985-07-04 | Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen | Arrangement for generating control pulses for operating a video recording and playback device |
DE4312424C2 (en) * | 1993-04-16 | 1997-04-24 | Iav Motor Gmbh | Housing cover with a speed sensor device and a dynamic sealing ring |
DE19813497C2 (en) * | 1998-03-26 | 2000-11-16 | Vogt Electronic Ag | Inductive displacement sensor |
DE102004060336A1 (en) * | 2004-12-15 | 2006-07-06 | Siemens Ag | Feedback wheel with reverse rotation coding for a crankshaft or camshaft sensor |
DE102007033745B4 (en) | 2007-07-19 | 2014-07-24 | Zf Friedrichshafen Ag | Inductive speed detection |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH539880A (en) * | 1971-07-30 | 1973-07-31 | Delmoran Ag | Control device on a positioning drive and its use |
DE2357061C2 (en) * | 1973-11-15 | 1985-02-14 | Robert Bosch Gmbh, 7000 Stuttgart | Device for the delivery of uniform pulses at certain angular positions of a rotatable shaft and for the formation of at least one reference signal |
IT1043269B (en) * | 1975-10-10 | 1980-02-20 | Magneti Marelli Spa | INVIDUATION SYSTEM OF A MULTIPLE OF ANGULAR POSITIONS A ROTATING ORGAN |
JPS5436961A (en) * | 1977-08-29 | 1979-03-19 | Nissan Motor | Angleeoffrotation detector |
-
1979
- 1979-09-29 DE DE19792939643 patent/DE2939643A1/en not_active Ceased
-
1980
- 1980-09-18 FR FR8020127A patent/FR2466775A1/en active Granted
- 1980-09-26 GB GB8031093A patent/GB2059598A/en not_active Withdrawn
- 1980-09-26 IT IT8024979A patent/IT1132795B/en active
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0071885A2 (en) * | 1981-08-06 | 1983-02-16 | Atlas Fahrzeugtechnik GmbH | Flyweel gear pulse generator comprising a marked tooth |
EP0071885A3 (en) * | 1981-08-06 | 1983-06-29 | Atlas Fahrzeugtechnik Gmbh | Flyweel gear pulse generator comprising a marked tooth |
FR2526953A1 (en) * | 1982-05-11 | 1983-11-18 | Citroen Sa | Magnetic detector for rotational speed and shaft position - has toothed ring with metal plate in zone where teeth are removed and uses magneto-resistive pick=up |
GB2162645A (en) * | 1984-06-29 | 1986-02-05 | Marelli Autronica | Detecting top dead centre of i.c. engine pistons |
WO1991013363A2 (en) * | 1990-02-22 | 1991-09-05 | Ford Motor Company Limited | Signal conditioning circuit |
WO1991013363A3 (en) * | 1990-02-22 | 1991-10-17 | Ford Motor Canada | Signal conditioning circuit |
EP0506399A1 (en) * | 1991-03-29 | 1992-09-30 | Cummins Electronics Company, Inc. | Single sensor apparatus and method for determining engine speed and position |
EP0663595A2 (en) * | 1991-03-29 | 1995-07-19 | Cummins Electronics Company, Inc. | Single sensor apparatus and method for determining engine speed and position |
EP0663595A3 (en) * | 1991-03-29 | 1995-09-13 | Cummins Electronics Company, Inc. | Single sensor apparatus and method for determining engine speed and position |
US6208131B1 (en) | 1995-11-20 | 2001-03-27 | Oribatal Engine Company | Electronic position and speed sensing device |
WO1997019358A1 (en) * | 1995-11-20 | 1997-05-29 | Orbital Engine Company (Australia) Pty. Limited | Electronic position and speed sensing device |
EP1731738A1 (en) * | 2004-04-02 | 2006-12-13 | Keihin Corporation | Crank angle detection device and ignition timing control device for internal combustion engine |
EP1731738A4 (en) * | 2004-04-02 | 2012-07-04 | Keihin Corp | Crank angle detection device and ignition timing control device for internal combustion engine |
US10234262B2 (en) | 2010-11-18 | 2019-03-19 | Continental Automotive France | Sensor for measuring angular position, and measurement compensation method |
CN105705951A (en) * | 2013-11-11 | 2016-06-22 | 通用电气公司 | Method for reducing error in rotor speed measurements |
US10539588B2 (en) | 2013-11-11 | 2020-01-21 | General Electric Company | Method for reducing error in rotor speed measurements |
CN105675907A (en) * | 2016-03-31 | 2016-06-15 | 中国神华能源股份有限公司 | Speed measuring device, slag conveyor structure and power plant boiler |
DE102017128183A1 (en) * | 2017-11-28 | 2019-05-29 | Bdr Thermea Group B.V. | Method for controlling an internal combustion engine in a combined heat and power plant and device for detecting operating parameters of an internal combustion engine in a combined heat and power plant |
FR3129438A1 (en) * | 2021-11-25 | 2023-05-26 | Vitesco Technologies | METHOD FOR DETERMINING AN ANGULAR POSITION OF A TOOTHED TARGET |
FR3129439A1 (en) * | 2021-11-25 | 2023-05-26 | Vitesco Technologies | TOOTHED TARGET FOR CRANKSHAFT |
WO2023094326A1 (en) * | 2021-11-25 | 2023-06-01 | Vitesco Technologies GmbH | Method for determining an angular position of a toothed target |
Also Published As
Publication number | Publication date |
---|---|
IT1132795B (en) | 1986-07-02 |
FR2466775B3 (en) | 1983-07-18 |
FR2466775A1 (en) | 1981-04-10 |
IT8024979A0 (en) | 1980-09-26 |
DE2939643A1 (en) | 1981-04-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB2059598A (en) | Inductive rotational speed or position transducers | |
US6323641B1 (en) | Non-contacting position sensor with helical flux linkage | |
GB2065310A (en) | Rotational speed or angle sensor and evaluation circuit | |
US20040017190A1 (en) | Apparatus and method for absolute angular position sensing | |
US9696183B2 (en) | Angular position detector including a variable reluctance resolver-encoder | |
US9958297B2 (en) | Sensor device for ascertaining at least one rotation characteristic of a rotating element | |
US20050193583A1 (en) | Angle-measurement device | |
JPH07507615A (en) | Rapid cylinder identification sensor device in multi-cylinder internal combustion engines | |
KR900002113B1 (en) | Torque monitoring | |
US10401194B2 (en) | Sensor for determining at least one rotation characteristic of a rotating element | |
US20190078910A1 (en) | Actuator with position sensor assembly | |
JPH05203442A (en) | Apparatus for detecting angle of rotation of two parts rotating | |
GB2058358A (en) | Detecting the rotational speed and/or angular position of a shaft | |
JPH02147863A (en) | Detector for measuring revolutions of internal combustion bngine | |
US5469055A (en) | Engine shaft with integrally formed complementary targets | |
EP0284508A2 (en) | Torquemeter | |
US7034524B2 (en) | Measuring device for the angle of rotation of a rotating machine member | |
JPH07251305A (en) | Power tool with chuck device | |
EP0947804A1 (en) | Rotational position sensor | |
JPH0682208A (en) | Device for detecting number of revolution or position of rotating transmitter section in noncontact type | |
JPH01500682A (en) | Internal combustion engine control device | |
JPS57124208A (en) | Crank position sensor | |
EP0882943A1 (en) | "Device for determining a momentary angular position" | |
US3955400A (en) | Viscous damper and method for determining the rotational position of a weight thereof | |
GB2533560A (en) | Crankshaft position sensing system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |