CN110657824A - Magnetic induction encoding device - Google Patents
Magnetic induction encoding device Download PDFInfo
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- CN110657824A CN110657824A CN201910444589.7A CN201910444589A CN110657824A CN 110657824 A CN110657824 A CN 110657824A CN 201910444589 A CN201910444589 A CN 201910444589A CN 110657824 A CN110657824 A CN 110657824A
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- magnetic
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- magnetoelectric
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- 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
Abstract
The invention discloses a magnetic induction coding device, which comprises a coding ring and a magnetic induction mechanism, wherein the coding ring is provided with a counting ring part, the magnetic induction mechanism is adjacently arranged corresponding to the coding ring and provides a magnetic field in a local area, and the magnetic field can be changed by the movement of the counting ring part of the coding ring.
Description
The technical field is as follows:
the present invention relates to the technical field related to mechanical positioning measurement, and more particularly, to a magnetic induction encoding device.
Background art:
rotary encoders, also known as shaft encoders, are precision positioning instruments commonly used in the industry to convert the rotational position and amount of a rotating shaft into analog or digital signals for system interpretation. The current rotary encoder can be divided into an incremental encoder and an absolute encoder, wherein the absolute encoder numbers different positions of the rotating shaft, and the position or the section of the rotating shaft currently rotating to the reading head can be correspondingly known according to the number read by the reading head.
The absolute type encoder can be further divided into an optical type and a mechanical type. The optical encoder comprises a disc rotating synchronously with the rotating shaft, wherein the disc is provided with a plurality of transparent sections and non-transparent sections which are concentric, the combination of the transparent sections and the non-transparent sections enables light to have different optical characteristics at different positions of the disc, and the characteristics can be measured by using a light sensing array so as to know the rotating position of the rotating shaft. Although accurate, the optical rotary encoder has low environmental resistance, i.e., if used in a severe environment, the accuracy of the optical rotary encoder is greatly reduced and may even be useless.
The invention content is as follows:
in view of the above-mentioned problems and disadvantages of the prior art, it is a primary object of the present invention to provide a magneto-inductive encoder device, which is designed to eliminate the disadvantages of an optical encoder that is easily interfered by the environment.
To achieve the above objective, the present inventors provide an embodiment of the magnetic induction encoding apparatus, which includes:
an encoding ring, which is a magnetizer with a ring body and a counting ring part; the counting ring part is arranged along one side of the central axis of the ring body and is provided with a plurality of counting through holes which are arranged at equal intervals;
a magnetic sensing mechanism, which is arranged adjacent to the coding ring and comprises a magnetic sensing unit, a magnetoelectric signal adjusting unit, a square/sinusoidal wave processing unit, a signal output unit, a joint and a shell; the magnetic sensing unit provides a magnetic field for a local area adjacent to the coding ring, and the magnetic field is changed by the motion of the counting ring part and outputs a sine wave magnetoelectric signal; the magnetoelectric signal adjusting unit is electrically connected with the magnetic sensing unit and is used for removing noise of the received sine wave magnetoelectric signal; the square/sine wave processing unit is electrically connected with the magnetoelectric signal adjusting unit and converts the sine wave magnetoelectric signal into a square wave magnetoelectric signal; the signal output unit is electrically connected with the square/sine wave processing unit and is used for removing noise and amplifying signals of the square wave magnetoelectric signals; the connector is electrically connected with the signal output unit and is used for transmitting the square wave magnetoelectric signal; the casing is a non-magnetic conductor, and the magnetic sensing unit, the magnetoelectric signal adjusting unit, the square/sinusoidal wave processing unit and the signal output unit are accommodated.
In an embodiment of the magnetic encoding device of the present invention, the magnetic sensing unit includes a permanent magnet and a magnetic sensing element, and the permanent magnet forms the magnetic field at a front end of the magnetic sensing element by a magnetic pole arrangement.
In an embodiment of the magnetic encoding device of the present invention, the encoding ring further has a reference ring portion, the reference ring portion is distributed along one side of the central axis of the ring body and is different from the other side of the counting ring portion, and the reference ring portion has at least one reference through hole.
In an embodiment of the magnetic encoding device of the present invention, the reference perforation aperture is larger than any one of the counting perforations.
Further, the present inventors provide an embodiment of the magnetic induction encoding apparatus, which includes: a coding ruler, which is a magnetizer provided with a ruler body and a first ruler mark part; the first scale mark part is arranged along one side of the central axis of the scale body and is provided with a plurality of first scale mark holes which are arranged at equal intervals; a magnetic sensing mechanism, which is arranged adjacent to the coding ring and comprises a magnetic sensing unit, a magnetoelectric signal adjusting unit, a square/sinusoidal wave processing unit, a signal output unit, a joint and a shell; the magnetic sensing unit provides a magnetic field for a local area adjacent to the coding ring, and the magnetic field is changed by the motion of the counting ring part and outputs a sine wave magnetoelectric signal; the magnetoelectric signal adjusting unit is electrically connected with the magnetic sensing unit and is used for removing noise of the received sine wave magnetoelectric signal; the square/sine wave processing unit is electrically connected with the magnetoelectric signal adjusting unit and converts the sine wave magnetoelectric signal into a square wave magnetoelectric signal; the signal output unit is electrically connected with the square/sine wave processing unit and is used for removing noise and amplifying signals of the square wave magnetoelectric signals; the connector is electrically connected with the signal output unit and is used for transmitting the square wave magnetoelectric signal; the casing is a non-magnetic conductor, and the magnetic sensing unit, the magnetoelectric signal adjusting unit, the square/sinusoidal wave processing unit and the signal output unit are accommodated.
In an embodiment of the magnetic encoding device of the present invention, the magnetic sensing unit includes a permanent magnet and a magnetic sensing element, and the permanent magnet forms the magnetic field at a front end of the magnetic sensing element by a magnetic pole arrangement.
In the embodiment of the magnetic encoding device of the present invention, the encoding ring further has a second scale portion, the second scale portion is distributed along one side of the central axis of the scale body and is different from the other side of the central axis of the scale body, and the second scale portion has at least one second scale hole.
In an embodiment of the magnetic encoding device of the present invention, the second scale hole has a larger diameter than any one of the first scale holes.
According to the above object of the present invention, a magnetic encoding device is provided, which comprises an encoder ring and a magnetic mechanism. The coding ring has a counter ring portion. The magnetic induction mechanism is arranged adjacent to the coding ring and provides a magnetic field in a local area, and the magnetic field is changed by the movement of the counting ring part of the coding ring. Through the components, the magnetic induction mechanism senses the motion of the coding ring in a non-contact manner, and the rotation position and the rotation speed are detected through the change of a magnetic field, so that the mechanical abrasion is avoided, the sensitivity of optical induction to environmental pollution can be further avoided, and the stability of the overall measurement is improved.
The specific implementation mode is as follows:
the following further describes embodiments of the magnetic induction encoding apparatus of the present invention to facilitate understanding of the embodiments of the present invention.
The magnetic induction coding device comprises a coding ring and a magnetic induction mechanism.
The coding ring is a magnetizer having a ring body, a counting ring portion, and a reference ring portion. The counting ring part and the reference ring part are distributed on two sides of the central axis of the ring body; the counting ring part is provided with a plurality of counting perforations which are arranged at equal intervals, the reference ring part is provided with at least one reference perforation, and the aperture of the reference perforation is larger than that of any counting perforation. When in use, the coding ring is sleeved and fixed on the outer periphery of a rotating shaft and moves with the rotating shaft.
The magnetic sensing mechanism comprises a magnetic sensing unit, a magnetoelectric signal adjusting unit, a square/sinusoidal wave processing unit, a signal output unit, a joint and a shell.
The magnetic sensing units are arranged adjacent to the corresponding coding rings. The magnetic sensing unit comprises a permanent magnet and a magnetic sensing component. The permanent magnet can form expected magnetic field (magnetic line) distribution at the front end (local part of the coding ring) of the magnetic sensing assembly through a magnetic pole arrangement mode, and the magnetic field is changed by the motion of the coding ring (the counting perforation of the counting ring part or the reference perforation of the reference ring part). The magnetic sensing component senses the change and outputs a sine wave magnetoelectric signal.
The magnetoelectric signal adjusting unit is electrically connected with the magnetic sensing unit and removes noise of the received sine wave magnetoelectric signal.
The square/sinusoidal wave processing unit is electrically connected with the magnetoelectric signal adjusting unit, converts sinusoidal wave magnetoelectric signals (sinusoidal wave forms) output by the magnetoelectric signal adjusting unit into square wave forms and outputs square wave magnetoelectric signals, so as to be beneficial to receiving and processing of rear-end equipment.
The signal output unit is electrically connected with the square/sinusoidal wave processing unit and is used for removing noise and amplifying signals of the square wave magnetoelectric signals output by the square/sinusoidal wave processing unit.
The connector is electrically connected with the signal output unit and can be connected with rear-end equipment in a matching manner, and square wave magnetoelectric signals output by the signal output unit are transmitted to the rear-end equipment.
The shell is a non-magnetic conductor and is used for accommodating the magnetic sensing unit, the magnetoelectric signal adjusting unit, the square/sinusoidal wave processing unit and the signal output unit.
Therefore, the above is a description of the components and assembly of the magnetic induction encoding device according to the preferred embodiment of the present invention, and the operation characteristics of the embodiment of the present invention are described as follows.
Firstly, the coding ring is sleeved on a rotating shaft and moves with the rotating shaft, the magnetic induction mechanism is arranged adjacent to the coding ring and provides a magnetic field for the adjacent area, and the other joint is matched with the rear-end equipment.
When the coding ring is driven by the rotating shaft, the counting ring part and the counting through holes on the coding ring and the reference ring part and the reference through holes can be gradually close to the magnetic sensing units of the magnetic sensing mechanism, and because the counting through holes and the reference through holes can form a height difference with the end surface of the ring body, the magnetic sensing units can obtain the change of the magnetic field through the change of the height difference so as to form interference on the magnetic field provided by the magnetic sensing units, and the rotation quantity of the coding ring relative to the magnetic sensing mechanism can be calculated.
In addition, the reference perforations in the reference ring portion can be used for zero setting or rotation number calculation of the code ring.
The invention can be applied to a shaft encoder and a linear encoder, and comprises an encoding scale and a magnetic induction mechanism; the magnetic sensing mechanism is the same as the above embodiments, and therefore, the description is omitted, except that: the coding ruler is a magnetizer having a ruler body, a first ruler mark portion and a second ruler mark portion. The first ruler mark part and the second ruler mark part are distributed on two sides of the central axis of the ruler body. The first scale part is provided with a plurality of first scale holes which are arranged at equal intervals, and the second scale part is provided with at least one second scale hole, and the aperture of the second scale hole is larger than that of any first scale hole.
The operation of the present embodiment is the same as the above embodiments, and therefore, the description thereof is omitted.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (8)
1. A magnetically inductive encoding device, comprising:
an encoding ring, which is a magnetizer with a ring body and a counting ring part; the counting ring part is arranged along one side of the central axis of the ring body and is provided with a plurality of counting through holes which are arranged at equal intervals;
a magnetic sensing mechanism, which is arranged adjacent to the coding ring and comprises a magnetic sensing unit, a magnetoelectric signal adjusting unit, a square/sinusoidal wave processing unit, a signal output unit, a joint and a shell; the magnetic sensing unit provides a magnetic field for a local area adjacent to the coding ring, and the magnetic field is changed by the motion of the counting ring part and outputs a sine wave magnetoelectric signal; the magnetoelectric signal adjusting unit is electrically connected with the magnetic sensing unit and is used for removing noise of the received sine wave magnetoelectric signal; the square/sine wave processing unit is electrically connected with the magnetoelectric signal adjusting unit and converts the sine wave magnetoelectric signal into a square wave magnetoelectric signal; the signal output unit is electrically connected with the square/sine wave processing unit and is used for removing noise and amplifying signals of the square wave magnetoelectric signals; the connector is electrically connected with the signal output unit and is used for transmitting the square wave magnetoelectric signal; the casing is a non-magnetic conductor, and the magnetic sensing unit, the magnetoelectric signal adjusting unit, the square/sinusoidal wave processing unit and the signal output unit are accommodated.
2. The magnetic encoding device of claim 1, wherein the magnetic sensor unit comprises a permanent magnet and a magnetic sensor element, and the permanent magnet forms the magnetic field at the front end of the magnetic sensor element by arranging magnetic poles.
3. The magnetic encoding device of claim 2, wherein the encoding ring 10 further comprises a reference ring portion, the reference ring portion is distributed along one side of the central axis of the ring body and is different from the other side of the counting ring portion, and the reference ring portion has at least one reference through hole.
4. A magnetically inductive encoding device according to claim 3, wherein the reference perforation aperture is larger than any of the count perforations.
5. A magnetically inductive encoding device, comprising: a coding ruler, which is a magnetizer provided with a ruler body and a first ruler mark part; the first scale mark part is arranged along one side of the central axis of the scale body 52, and the first scale mark part is provided with a plurality of first scale mark holes which are arranged at equal intervals; a magnetic sensing mechanism, which is arranged adjacent to the coding ring and comprises a magnetic sensing unit, a magnetoelectric signal adjusting unit, a square/sinusoidal wave processing unit, a signal output unit, a joint and a shell; the magnetic sensing unit provides a magnetic field for a local area adjacent to the coding ring, and the magnetic field is changed by the motion of the counting ring part and outputs a sine wave magnetoelectric signal; the magnetoelectric signal adjusting unit is electrically connected with the magnetic sensing unit and is used for removing noise of the received sine wave magnetoelectric signal; the square/sine wave processing unit is electrically connected with the magnetoelectric signal adjusting unit and converts the sine wave magnetoelectric signal into a square wave magnetoelectric signal; the signal output unit is electrically connected with the square/sine wave processing unit and is used for removing noise and amplifying signals of the square wave magnetoelectric signals; the connector is electrically connected with the signal output unit and is used for transmitting the square wave magnetoelectric signal; the casing is a non-magnetic conductor, and the magnetic sensing unit, the magnetoelectric signal adjusting unit, the square/sinusoidal wave processing unit and the signal output unit are accommodated.
6. The magnetic encoding device of claim 5, wherein the magnetic sensor unit comprises a permanent magnet and a magnetic sensor element, and the permanent magnet forms the magnetic field at the front end of the magnetic sensor element by arranging magnetic poles.
7. The magnetic encoding device of claim 6, wherein the encoding ring 10 further comprises a second scale portion, the second scale portion is disposed along one side of the central axis of the scale body and is different from the other side of the central axis of the scale body, and the second scale portion has at least one second scale hole.
8. A magnetically susceptible encoding device according to claim 7, wherein the second scale holes are larger in diameter than any one of the first scale holes.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW107122569A TWI656326B (en) | 2018-06-29 | 2018-06-29 | Magnetic induction coding device |
| TW107122569 | 2018-06-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110657824A true CN110657824A (en) | 2020-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910444589.7A Pending CN110657824A (en) | 2018-06-29 | 2019-05-27 | Magnetic induction encoding device |
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| Country | Link |
|---|---|
| CN (1) | CN110657824A (en) |
| TW (1) | TWI656326B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101358859A (en) * | 2007-07-30 | 2009-02-04 | 雅马哈株式会社 | Position detector |
| TW201336222A (en) * | 2012-02-24 | 2013-09-01 | Foxnum Technology Co Ltd | Absolute place recording device for motors |
| GB2531257A (en) * | 2014-10-13 | 2016-04-20 | Skf Ab | Compass sensor based angle encoder for a magnetic target ring |
| CN206362296U (en) * | 2017-01-13 | 2017-07-28 | 加锐企业有限公司 | Can the linear displacement sensing device of program |
| TWI612278B (en) * | 2015-11-18 | 2018-01-21 | 國立清華大學 | Ring magnetic encoder, manufacturing device for ring magnetic encoder, rotary shaft offset detecting method, and human-machine interface device thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW368107U (en) * | 1998-09-18 | 1999-08-21 | Ind Tech Res Inst | A reading head for linear scale |
| JP2004257850A (en) * | 2003-02-26 | 2004-09-16 | Fanuc Ltd | Rotary encoder |
| TWM542763U (en) * | 2017-02-23 | 2017-06-01 | 台達電子工業股份有限公司 | Encoder |
| TWM568357U (en) * | 2018-06-29 | 2018-10-11 | 許弘裕 | Magnetic induction encoding device |
-
2018
- 2018-06-29 TW TW107122569A patent/TWI656326B/en active
-
2019
- 2019-05-27 CN CN201910444589.7A patent/CN110657824A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101358859A (en) * | 2007-07-30 | 2009-02-04 | 雅马哈株式会社 | Position detector |
| TW201336222A (en) * | 2012-02-24 | 2013-09-01 | Foxnum Technology Co Ltd | Absolute place recording device for motors |
| GB2531257A (en) * | 2014-10-13 | 2016-04-20 | Skf Ab | Compass sensor based angle encoder for a magnetic target ring |
| TWI612278B (en) * | 2015-11-18 | 2018-01-21 | 國立清華大學 | Ring magnetic encoder, manufacturing device for ring magnetic encoder, rotary shaft offset detecting method, and human-machine interface device thereof |
| CN206362296U (en) * | 2017-01-13 | 2017-07-28 | 加锐企业有限公司 | Can the linear displacement sensing device of program |
Also Published As
| Publication number | Publication date |
|---|---|
| TW202001192A (en) | 2020-01-01 |
| TWI656326B (en) | 2019-04-11 |
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Application publication date: 20200107 |
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