CN211401229U - Gear multi-ring magnetoelectric rotary encoder - Google Patents
Gear multi-ring magnetoelectric rotary encoder Download PDFInfo
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- CN211401229U CN211401229U CN202020067093.0U CN202020067093U CN211401229U CN 211401229 U CN211401229 U CN 211401229U CN 202020067093 U CN202020067093 U CN 202020067093U CN 211401229 U CN211401229 U CN 211401229U
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Abstract
The utility model discloses a many rings of magnetoelectric rotary encoder of gear relates to measuring instrument technical field. A gear multi-ring magnetoelectric rotary encoder comprises an input shaft, an output shaft, a speed change gear box, a circuit board, a partition plate and a shell, wherein the circuit board comprises a first circuit board and a second circuit board which are arranged on two sides of the partition plate, and the input shaft is in driving connection with the output shaft through the speed change gear box; the angle measuring assembly and the circle number measuring assembly are arranged on two sides of the partition plate, and the partition plate is used as an electromagnetic shielding plate to attenuate or prevent interference; the angle measuring assembly and the partition plate are arranged inside the shell, and the shell is made of electromagnetic shielding materials and can attenuate or prevent external electromagnetic fields from interfering with angle measurement. The utility model discloses can decay or prevent that the inside and outside electromagnetic field of encoder from improving the angular surveying precision to the interference of angular surveying chip.
Description
Technical Field
The utility model relates to a measuring instrument technical field.
Background
The encoder is a device for converting angular displacement or linear displacement into an electric signal, the former is called a code disc, the latter is called a code ruler, and the encoder can measure the rotating angle or linear displacement of a rotating shaft and transmit the angle or linear displacement to an upper computer in the form of digital quantity. At present, an encoder can be divided into an incremental type, a single-circle absolute value type and a multi-circle absolute value type according to the measuring range capacity, a magnetoelectric type, a magnetosensitive type and a photoelectric type according to the form of a sensor, a passive type and an active type according to the driving energy source distinction, and a linear type and a rotary type according to the motion form. The magnetoelectric encoder has the characteristics of vibration resistance, corrosion resistance, pollution resistance, interference resistance and wide temperature, and can be applied to the field which cannot be adapted by the traditional photoelectric encoder. The principle of the magnetoelectric encoder is that a magnetic resistance or a Hall element is adopted to measure the angle or displacement value of a changed magnetic material, the change of the angle or displacement of the magnetic material can cause the change of certain current or voltage, the variable quantity is amplified through an amplifying circuit, and a pulse signal or an analog signal is output after the single chip microcomputer is used for processing, so that the purpose of measurement is achieved. Compared with a single-ring magnetoelectric encoder, the multi-ring magnetoelectric encoder has the advantages that the measuring range is enlarged, the technical methods of the multi-ring magnetoelectric encoder are more in variety, and the gear structure is mainly used.
Many rings of magnetoelectric rotary encoder of gear contains a plurality of magnets and magnetic induction chip usually, can be used for measuring angle and number of revolutions, and the inside a plurality of magnets of encoder often lie in same side and adjacent setting. Referring to fig. 1, there is illustrated a multi-turn magneto-electric rotary encoder with gears commonly used in the prior art, including: the input shaft a is connected with a plurality of output shafts c through a gear speed reducing mechanism b; the output shafts c comprise angle measuring rotating shafts and circle number measuring rotating shafts, the end part of each output shaft c is fixedly provided with a magnet d, each magnet d comprises an angle measuring magnet and a circle number measuring magnet, and all the magnets d are positioned on the same side and are close to the same plane; and a plurality of magnetic induction chips e are arranged on the circuit board f, and all the magnetic induction chips e are arranged on the same side and are arranged opposite to the magnets d in a one-to-one correspondence manner. In the structure, the magnet for measuring the number of turns inside can interfere the magnetic induction chip for measuring the angle, and the angle measurement precision is influenced. On the other hand, the shell of the existing gear multi-ring magnetoelectric rotary encoder usually adopts an aluminum alloy shell, and the interference of an electromagnetic field outside the encoder can influence the precision of angle measurement, so that the precision of angle measurement is generally low.
Disclosure of Invention
The utility model aims to provide a: the defects of the prior art are overcome, and a novel gear multi-ring magnetoelectric rotary encoder is provided. The utility model provides a technical scheme can decay or prevent that the inside and outside electromagnetic field of encoder from improving the angular surveying precision to the interference of angular surveying chip.
In order to achieve the above object, the utility model provides a following technical scheme:
a gear multi-ring magnetoelectric rotary encoder comprises an input shaft, an output shaft, a speed change gear box, a circuit board, a partition plate and a shell, wherein the circuit board comprises a first circuit board and a second circuit board which are arranged on two sides of the partition plate, and the input shaft is in driving connection with the output shaft through the speed change gear box;
the end part of the input shaft is provided with a magnet, and the magnet is arranged corresponding to an angle measurement magnetic induction chip arranged on the first circuit board to form an angle measurement component; the end part of the output shaft is provided with a magnet which is arranged corresponding to the turn number measuring magnetic induction chip arranged on the second circuit board to form a turn number measuring component; the angle measuring assembly and the turn number measuring assembly are arranged on two sides of the partition plate, and the partition plate is used as an electromagnetic shielding plate to attenuate or prevent interference;
the angle measuring assembly and the partition plate are arranged inside the shell, and the shell is made of electromagnetic shielding materials and can attenuate or prevent external electromagnetic fields from interfering with angle measurement.
Further, change gear box drive connection has one or more output shafts, and the equal fixed mounting of tip of every output shaft has magnet, and is corresponding, be provided with one or more number of turns on the second circuit board and measure the magnetic induction chip, the number of turns measure the magnetic induction chip with magnet is just to setting up one by one.
Further, a magnet arranged at the end of the input shaft is used as an angle measuring magnet and is arranged opposite to the angle measuring magnetic induction chip.
Furthermore, the clapboard is made of a magnetic conductive material plate.
Further, the input shaft and the output shaft are connected with the partition plate through bearings.
Furthermore, the shell adopts a magnetic conductive material cover with an opening at the bottom, and the shell is sleeved outside the angle measuring component, the speed change gear box and the partition plate.
Further, the speed change gear box is a gear reduction box.
Further, a processor and a memory are arranged on the first circuit board and the second circuit board, and the processor is in communication connection with the magnetic induction chip and the memory.
The utility model discloses owing to adopt above technical scheme, compare with prior art, as the example, have following advantage and positive effect: 1) the angle measurement assembly and the number of turns measurement assembly are arranged on two sides of the partition plate, and the partition plate can attenuate the interference of the number of turns measurement magnet on the angle measurement magnetic induction chip as a shielding plate, so that the angle measurement precision is improved. 2) The shell is arranged to attenuate or prevent the interference of an external electromagnetic field to the angle measurement magnetic induction chip, and the angle measurement precision is further improved.
Drawings
Fig. 1 is a schematic structural diagram of a gear multi-turn magnetoelectric rotary encoder provided in the prior art.
Fig. 2 is a schematic structural diagram of a multi-ring gear magnetoelectric rotary encoder according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a multi-ring gear magnetoelectric rotary encoder according to an embodiment of the present invention.
Description of reference numerals:
the device comprises an input shaft a, a gear reduction mechanism b, an angle and turn number measuring rotating shaft c, a magnet d, a magnetic induction chip e and a circuit board f;
an input shaft 1;
a second circuit board 2;
measuring the number of turns of the magnetic induction chips 3, 4 and 5;
the number of turns is measured magnets 6, 7, 8;
a separator 12;
a gear reduction box 13;
an angle measuring magnet 14;
an angle measurement magnetic induction chip 15;
a first circuit board 16;
a housing 17;
and a bearing 18.
Detailed Description
The gear multi-turn magnetoelectric rotary encoder disclosed by the invention is further described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that technical features or combinations of technical features described in the following embodiments should not be considered as being isolated, and they may be combined with each other to achieve better technical effects. In the drawings of the embodiments described below, the same reference numerals appearing in the respective drawings denote the same features or components, and may be applied to different embodiments. Thus, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
It should be noted that the structures, ratios, sizes, etc. shown in the drawings of the present specification are only used for matching with the contents disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, and any modifications of the structures, changes of the ratio relationships, or adjustments of the sizes should fall within the scope that the technical contents disclosed in the present invention can cover without affecting the functions and purposes that the present invention can achieve.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values and types of materials are to be construed as merely illustrative, and not restrictive. Thus, other examples of example embodiments may have different values and material classes.
Examples
A gear multi-ring magnetoelectric rotary encoder comprises an input shaft, an output shaft, a speed change gear box, a circuit board, a partition plate and a shell.
The circuit board comprises a first circuit board and a second circuit board which are arranged on two sides of the partition board, an angle measurement magnetic induction chip is placed on the first circuit board, and a circle number measurement magnetic induction chip is placed on the second circuit board.
The input shaft is connected with an output shaft through a speed change gear box in a driving mode.
And a magnet is arranged at the end part of the input shaft and corresponds to the angle measurement magnetic induction chip to form an angle measurement assembly.
Magnet is installed to the tip of output shaft, and this magnet is corresponding the number of turns and measures magnetic induction chip and set up formation number of turns measurement subassembly.
The angle measuring assembly and the circle number measuring assembly are arranged on two sides of the partition plate, and the partition plate is used as an electromagnetic shielding plate to attenuate or prevent interference.
In specific implementation, the partition plate can be made of any material with magnetic shielding property. In this embodiment, preferably, the partition board is made of a magnetic conductive material, and the electromagnetic shielding effect of the magnetic conductive material board is used to attenuate or prevent interference.
The angle measuring assembly and the partition plate are arranged inside the shell, and the shell is made of electromagnetic shielding materials and can attenuate or prevent external electromagnetic fields from interfering with angle measurement.
The housing can be made of any material having magnetic shielding properties. Preferably, the housing is made of a magnetically conductive material, as with the separator plate, to attenuate or prevent interference by electromagnetic shielding of the plate of magnetically conductive material. The shell can be a magnetic conductive material cover with an opening at the bottom and is sleeved outside the angle measuring component, the speed change gear box and the partition plate.
The magnetic conductive material can be a hard magnetic material or a soft magnetic material, and those skilled in the art can select the magnetic conductive material adaptively according to the characteristics of the shielding space. By way of example and not limitation, for encoders with a small internal space, it is preferable to use a low coercivity soft magnetic material in order to avoid the effect of hysteresis of the magnetic conductive material on the measurement; for the encoder with a large enough internal space, considering that the influence of the magnetic conduction material on the measurement is not large, the requirement of the material can be properly reduced according to the requirement, and the hard magnetic material is used.
The variable speed gear box is a gear reduction box and can be in drive connection with one or more output shafts, magnets are fixedly mounted at the end part of each output shaft and correspond to the magnets, one or more circle number measuring magnetic induction chips are arranged on the second circuit board, and the circle number measuring magnetic induction chips and the magnets are arranged in a one-to-one opposite mode.
The magnets are preferably cylindrical, and the magnets on the plurality of output shafts are located on the same plane. The angle measuring magnet 14 and the number-of-turns measuring magnets 6, 7, 8 may be flat cylindrical magnets, and the outside diameter of the magnets is preferably in the range of 2-8 mm. The distance between each magnetic induction chip and the corresponding magnet is preferably in the range of 0.5-2 mm.
The present embodiment will be described in detail with reference to fig. 2 by taking 3 output shafts as an example.
Referring to fig. 2, an angle measuring magnet 14 is fixed to an end portion of an input shaft 1 of the gear multi-turn magnetoelectric rotary encoder, the angle measuring magnet 14 faces an angle measuring magnetic induction chip 15, and the angle measuring magnetic induction chip 15 is mounted on a first circuit board 16 for measuring an angle.
The input shaft 1 is in driving connection with 3 output shafts 9, 10 and 11 through a gear reduction box 13, the ends of the output shafts 9, 10 and 11 are respectively fixed with circle number measuring magnets 8, 7 and 6, the circle number measuring magnets 8, 7 and 6 are respectively arranged right opposite to circle number measuring magnetic induction chips 3, 4 and 5, and the circle number measuring magnetic induction chips 3, 4 and 5 are arranged on the second circuit board 2 and used for measuring the number of rotation circles.
Through adopting above-mentioned structure, the number of turns measuring subassembly and a plurality of number of turns measuring magnet 8, 7, 6 and the number of turns measuring magnetic induction chip 3 that the angle measurement magnet 14 and the angle measurement magnetic induction chip 15 among the many rings of gear magnetoelectric rotary encoder formed arrange respectively in the both sides of baffle 12 with the number of turns measuring subassembly that the number of turns measuring magnet 3, 4, 5 etc. formed, compare with setting up angle measurement subassembly and number of turns measuring subassembly in same one side among the prior art, can attenuate number of turns measuring magnet 8, 7, 6 interference to angle measurement magnetic induction chip 15, thereby improve angle measurement accuracy. The partition plate 12 uses a soft magnetic material as a shielding material.
The shell 17 is arranged outside the angle measurement component, the speed change gear box 13 and the partition plate 12 to form a shielding cover, so that the interference of an external electromagnetic field on the angle measurement magnetic induction chip 15 is prevented, and the angle measurement precision can be further improved. The housing 17 may also be made of a soft magnetic material.
Referring to fig. 3, in a preferred embodiment, the input shaft 1 and the output shafts 9, 10, 11 are connected to the partition 12 through bearings 18 to form a pivot structure.
In this embodiment, a processor and a memory are disposed on the first circuit board and the second circuit board, and the processor is in communication connection with the magnetic induction chip and the memory.
Specifically, the magnetic induction chip, the processor and the memory which are correspondingly arranged may be integrated on the same printed circuit board and located on the same plane, the processor is configured to control the magnetic induction chip to perform data acquisition and processing, and for example and without limitation, the processor may adopt a microcontroller, a digital signal processor, a complex programmable logic device or a field programmable gate array.
In the description above, the disclosure of the present invention is not intended to limit itself to these aspects. Rather, the various components may be selectively and operatively combined in any number within the intended scope of the present disclosure. In addition, terms like "comprising," "including," and "having" should be interpreted as inclusive or open-ended, rather than exclusive or closed-ended, by default, unless explicitly defined to the contrary. All technical, scientific, or other terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs unless defined otherwise. Common terms found in dictionaries should not be interpreted too ideally or too realistically in the context of related art documents unless the present disclosure expressly limits them to that. Any alterations and modifications of the present invention based on the above disclosure will be apparent to those skilled in the art from the present disclosure, and all such modifications and modifications are intended to fall within the scope of the appended claims.
Claims (8)
1. The utility model provides a many rings of magnetoelectric rotary encoder of gear which characterized in that: the circuit board comprises a first circuit board and a second circuit board which are arranged on two sides of the partition board, and the input shaft is in driving connection with the output shaft through the speed change gear box;
the end part of the input shaft is provided with a magnet, and the magnet is arranged corresponding to an angle measurement magnetic induction chip arranged on the first circuit board to form an angle measurement component; the end part of the output shaft is provided with a magnet which is arranged corresponding to the turn number measuring magnetic induction chip arranged on the second circuit board to form a turn number measuring component; the angle measuring assembly and the turn number measuring assembly are arranged on two sides of the partition plate, and the partition plate is used as an electromagnetic shielding plate to attenuate or prevent interference;
the angle measuring assembly and the partition plate are arranged inside the shell, and the shell is made of electromagnetic shielding materials and can attenuate or prevent external electromagnetic fields from interfering with angle measurement.
2. The geared multi-turn magnetoelectric rotary encoder according to claim 1, wherein: the variable speed gear box is in driving connection with one or more output shafts, magnets are fixedly mounted at the end portions of the output shafts and correspond to the output shafts, one or more circle number measuring magnetic induction chips are arranged on the second circuit board, and the circle number measuring magnetic induction chips and the magnets are arranged in a one-to-one opposite mode.
3. The geared multi-turn magnetoelectric rotary encoder according to claim 1, wherein: and the magnet arranged at the end part of the input shaft is used as an angle measuring magnet and is arranged opposite to the angle measuring magnetic induction chip.
4. A geared multi-turn magneto-electric rotary encoder according to claim 1, 2 or 3, wherein: the partition board is made of a magnetic conductive material board.
5. A geared multi-turn magneto-electric rotary encoder according to claim 1, 2 or 3, wherein: the input shaft and the output shaft are connected with the partition plate through bearings.
6. A geared multi-turn magneto-electric rotary encoder according to claim 1, 2 or 3, wherein: the shell is a magnetic conductive material cover with an opening at the bottom, and is sleeved outside the angle measuring assembly, the speed change gear box and the partition plate.
7. A geared multi-turn magneto-electric rotary encoder according to claim 1, 2 or 3, wherein: the speed change gear box is a gear reduction box.
8. A geared multi-turn magneto-electric rotary encoder according to claim 1, 2 or 3, wherein: and the first circuit board and the second circuit board are provided with a processor and a memory, and the processor is in communication connection with the magnetic induction chip and the memory.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020067093.0U CN211401229U (en) | 2020-01-11 | 2020-01-11 | Gear multi-ring magnetoelectric rotary encoder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020067093.0U CN211401229U (en) | 2020-01-11 | 2020-01-11 | Gear multi-ring magnetoelectric rotary encoder |
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| CN211401229U true CN211401229U (en) | 2020-09-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112461119A (en) * | 2020-11-03 | 2021-03-09 | 中国空空导弹研究院 | High-precision multi-coil magnetoelectric absolute value angle sensor and implementation method |
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2020
- 2020-01-11 CN CN202020067093.0U patent/CN211401229U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112461119A (en) * | 2020-11-03 | 2021-03-09 | 中国空空导弹研究院 | High-precision multi-coil magnetoelectric absolute value angle sensor and implementation method |
| CN112461119B (en) * | 2020-11-03 | 2022-06-28 | 中国空空导弹研究院 | High-precision multi-coil magnetoelectric absolute value angle sensor and implementation method |
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