GB1179754A - Position-Measuring Apparatus - Google Patents
Position-Measuring ApparatusInfo
- Publication number
- GB1179754A GB1179754A GB4869367A GB4869367A GB1179754A GB 1179754 A GB1179754 A GB 1179754A GB 4869367 A GB4869367 A GB 4869367A GB 4869367 A GB4869367 A GB 4869367A GB 1179754 A GB1179754 A GB 1179754A
- Authority
- GB
- United Kingdom
- Prior art keywords
- disc
- pickups
- gauge
- phase difference
- strips
- 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
Links
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
1,179,754. Measuring displacements electrically. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Oct.26, 1967 [Oct.29, 1966], No.48693/67. Headings G1A and G1N. The position or variation in position of a linearly movable object is measured by a device comprising a rotating disc 5, Fig. 1, provided round its circumference with strips 1 having the form of involutes whose common evolute is a circle 2a contacting a line 2 along which equally spaced marks 3 of a gauge movable with the body, are arranged. The disc 5 is rotated at a constant speed and the relative position of the strips and marks is sensed using an inductive or capacitative pickup or optically to produce an A. C. signal whose phase is indicative of the position of the gauge. As shown, Fig.2, the pickup comprises a permanent magnet 8 surrounded by a coil 9, the marks 3 and strips 1, which are formed of magnetically permeable material, being arranged in a magnetic circuit 12 to vary the air gap dependent on their presence or absence. The A.C. signal generated in the coil 9 may be compared with a reference A. C. signal, in phase with the output signal for a given position of gauge and disc, to determine the phase difference and variation in position of the gauge. Alternatively the A. C. signals generated by two pickups (15), (16), Fig. 3a (not shown) associated with the gauge (14) arranged at either end of a diameter of the circuit 2a, may be compared in phase, a phase difference of 360‹ resulting from a movement of half a pitch of the gauge. To correct for the effects of the eccentric mounting of the disc, which produces an additional phase difference between the outputs of the two pickups, dependent on the angular position of the disc, the angular position of the disc is sensed inductively by pickups (23), (24), Fig.5a (not shown) which detect the presence of marks (24) of magnetic material arranged concentrically on the disc 5 and having the same pitch angle as the strips. The two output signals from these pickups also have the same phase difference as that of the outputs of pickups (15), (16) produced above by eccentric mounting of the disc, the signals being used to eliminate the effects of this phase difference from the outputs of pickups (15), (16).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP0040698 | 1966-10-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1179754A true GB1179754A (en) | 1970-01-28 |
Family
ID=7377304
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4869367A Expired GB1179754A (en) | 1966-10-29 | 1967-10-26 | Position-Measuring Apparatus |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1548764A1 (en) |
GB (1) | GB1179754A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3212149A1 (en) * | 1982-04-01 | 1983-10-13 | Oelsch KG, 1000 Berlin | Angle-of-rotation sensor |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009023395B4 (en) * | 2009-05-29 | 2019-06-19 | Lakeview Innovation Ltd. | Code disc for an encoder |
-
1966
- 1966-10-29 DE DE19661548764 patent/DE1548764A1/en active Pending
-
1967
- 1967-10-26 GB GB4869367A patent/GB1179754A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3212149A1 (en) * | 1982-04-01 | 1983-10-13 | Oelsch KG, 1000 Berlin | Angle-of-rotation sensor |
Also Published As
Publication number | Publication date |
---|---|
DE1548764A1 (en) | 1970-04-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5041785A (en) | Device for measuring a relative displacement of two objects, including a magnetic scale and two mutually perpendicular magnetic sensors which produce two independent phase displaced signals | |
GB1477508A (en) | Measuring apparatus | |
GB1492980A (en) | Position measuring arrangements using magnetoresistance | |
GB2176616A (en) | Magnetic field responsive device for measuring rotation | |
ES2108789T3 (en) | INDUCTIVE POSITION TRANSDUCER. | |
GB1482131A (en) | Transducers | |
GB1246893A (en) | A phase adjust circuit for use in non-contact eddy current instruments | |
ES433104A1 (en) | Position measuring transformer | |
US2913662A (en) | Feed rate meters | |
US2914756A (en) | Measuring apparatus comprising a graduated scale | |
GB1497231A (en) | Pressure sensor utilizing a ferromagnetic fluid | |
US3716787A (en) | Apparatus for monitoring speed utilizing a tuned circuit whose phase changes in proportional to speed | |
GB1413688A (en) | Analogue function generator | |
GB1179754A (en) | Position-Measuring Apparatus | |
US3582769A (en) | Device for the noncontact gauging the displacement of objects moved in a straight line | |
JPS57152363A (en) | Detector for displacement rate of ram in die casting machine | |
GB1470247A (en) | Devices for indicating direction of rotation | |
IL73047A (en) | Coil system for inductive measurement of the velocity of movement of a magnetized body | |
GB1281339A (en) | Improvements in the measurements of twist in rotating shafts | |
GB1519953A (en) | Linear induction actuators | |
GB1372109A (en) | Electromagnetic flaw detector | |
SU1580153A1 (en) | Noncontact pickup of distance to object made from ferromagnetic material | |
SU527587A1 (en) | Device for measuring geometric dimensions | |
SU723367A2 (en) | Contactless rotation-indicating sensor | |
SU712851A1 (en) | Receiver protecting device |