CN210375163U - Encoder - Google Patents
Encoder Download PDFInfo
- Publication number
- CN210375163U CN210375163U CN201921355324.1U CN201921355324U CN210375163U CN 210375163 U CN210375163 U CN 210375163U CN 201921355324 U CN201921355324 U CN 201921355324U CN 210375163 U CN210375163 U CN 210375163U
- Authority
- CN
- China
- Prior art keywords
- circuit board
- encoder
- chip
- magnetic induction
- data acquisition
- 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.)
- Active
Links
Images
Landscapes
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
The utility model discloses a many rings of encoders based on magnetic field detection principle, including code wheel, cavity cylinder spare, many antipodal ring magnet, first circuit board, the second circuit board, the magnetic induction chip, single circle data acquisition chip, luminotron and receiver, to many rings of encoders among the prior art be difficult to satisfy some problems that contain hollow structure, the application of low-power consumption and little volume requirement, provide an encoder, adopt the split type design of no bearing, fix code wheel and many antipodal ring magnet on cavity cylinder spare, satisfy and require hollow structure, low-power consumption and small application scenario to the encoder.
Description
Technical Field
The utility model relates to an encoder.
Background
The multi-turn encoder can sense the absolute angular position in one turn and the number of turns, so that a larger absolute position measuring range is obtained, and the multi-turn encoder is widely applied to the fields of numerical control machines, robots, motor feedback systems and the like. The multi-turn encoders commonly used in the current market are generally classified into mechanical and battery-backed multi-turn encoders. Mechanical encoders have higher cost, more complex structure and larger size compared with battery backup multi-turn encoders, so that the application occasions are limited.
The battery backup multi-turn encoder can be divided into two types of photoelectric detection and magnetic field detection according to the detection principle. Compared with a photoelectric detection scheme, the magnetic field detection has the advantages of lower power consumption, better environmental tolerance and the like, and higher reliability can be obtained.
The structure of the magnetic detection multi-turn encoder is affected by the magnet chosen, and if a cylindrical magnet is used, a hollow structure cannot be achieved. The encoder can not be applied to occasions needing internal wiring, such as a robot joint motor, a direct drive motor and the like, so that the encoder has to select a ring magnet to generate a magnetic field in the occasions.
Disclosure of Invention
To many rings of encoders among the prior art be difficult to satisfy some problems that contain the application of hollow structure, low-power consumption and little volume requirement, the utility model provides an encoder satisfies the application occasion that requires hollow structure, low-power consumption and small to the encoder.
The utility model discloses a solve above-mentioned technical problem, adopt following technical scheme:
an encoder comprises a code wheel, a hollow cylindrical part, a multi-antipode annular magnet, a first circuit board, a second circuit board, a magnetic induction chip, a single-circle data acquisition chip, a light emitting tube and a receiver;
the coded disc and the multiple pairs of polar annular magnets are arranged on the hollow cylindrical piece and are coaxial with the hollow cylindrical piece;
the first circuit board and the second circuit board are both parallel to the code disc;
the second circuit board is provided with a magnetic induction chip and a single-circle data acquisition chip, and the magnetic induction chip is positioned in the magnetic field range of the multi-pair-pole annular magnet;
a light emitting tube is arranged on the first circuit board, a receiver is arranged on the second circuit board, and light rays emitted by the light emitting tube pass through the coded disc and are projected to the receiver;
the multiple pairs of polar ring magnets are magnetized in the radial direction, and N, S poles are alternately arranged.
It is right to the utility model discloses technical scheme's further improvement, first circuit board, second circuit board are the half-ring shape. The first circuit board and the second circuit board are arranged in a semi-ring shape and are matched with the ring shapes of the code disc and the ring magnet, the space position relation among the parts such as the sensing element, the magnet, the optical device and the like can be guaranteed, and meanwhile, the positions of all the parts are convenient to check due to the semi-ring shape.
It is right to the utility model discloses technical scheme's further improvement, through leg joint between first circuit board, the second circuit board, the support is half encirclement shape. The semi-surrounding bracket is good in stability and beneficial to fixing the first circuit board and the second circuit board.
To the technical scheme of the utility model further improve, magnetic sensitivity chip is hall sensor. Hall sensor has the low power dissipation, and anti external magnetic field interference ability is strong, and the precision is high, and advantages such as environmental tolerance is good help improving the utility model discloses the interference immunity of encoder to obtain more accurate motor shaft position.
It is right to the utility model discloses technical scheme's further improvement, the single circle data acquisition chip is microprocessor chip MCU, or special chip ASIC. The microprocessor chip MCU or the special chip ASIC collects the analog quantity signal which is sent by the receiver and contains the position of the motor shaft, after analog-to-digital conversion, the absolute position value of the motor shaft in a circle range is calculated for the digital quantity through a built-in algorithm, and therefore single circle data is calculated.
In addition, the number of pole pairs of the multi-pair annular magnet is 16, 32 or 64.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses the encoder adopts no bearing hollow structure, and annular magnet and code wheel are fixed with one heart in two bottom surfaces of a cavity cylinder spare, guarantee that concentricity control is in the certain limit between the two, and when using, cavity cylinder spare is installed and is fixed on the motor shaft, and this kind of structural design can reduce the space demand of encoder by the at utmost, and some must be particularly suitable for in the inside application occasion of walking the line of motor, like robot joint and direct drive motor, from this, the utility model discloses the encoder can satisfy and require hollow structure, low-power consumption and small application occasion to the encoder.
2. The utility model discloses the encoder, wherein single circle data acquisition chip can be used to solve out single circle position value, and magnetism perception chip can be used to obtain sending for single circle data acquisition chip behind the number of turns information, accomplishes the synchronization of single circle data and many circles of data at last in single circle data acquisition chip to exportable complete position value.
Drawings
Fig. 1 is a schematic structural diagram of an encoder according to an embodiment of the present invention.
Fig. 2 is a schematic view of a ring magnet according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of an encoder according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the code wheel 3 and the multiple pairs of polar ring magnets 5 are respectively provided on both bottom surfaces of the hollow cylindrical member 4, and are coaxial with the hollow cylindrical member 4;
the first circuit board 6 and the second circuit board 8 are both parallel to the code wheel 3; the first circuit board 6 and the second circuit board 8 are semi-annular, the first circuit board 6 and the second circuit board 8 are connected through a support 7, and the support 7 is semi-surrounding;
a magnetic induction chip 9 and a single-circle data acquisition chip 10 are arranged on the second circuit board 8, and the magnetic induction chip 9 is positioned in the magnetic field range of the multi-pair-pole annular magnet 5;
a light emitting tube 11 is arranged on the first circuit board 6, a receiver 12 is arranged on the second circuit board 8, and light rays emitted by the light emitting tube 11 pass through the coded disc 3 and are projected to the receiver 12;
when the encoder is used, the hollow cylindrical part 4 is installed on the motor shaft 1 through a fastening screw, the first circuit board 6 is installed on the motor flange 2, and the magnetic induction chip 9 and the single-circle data acquisition chip 10 are welded on the surface of the second circuit board 8;
in this embodiment, the magnetic-sensing chip 9 is a hall sensor; the single-turn data acquisition chip 10 is a Microprocessor Chip (MCU).
As shown in fig. 2, N, S poles of the multiple pairs of polar ring magnets 5 are alternately arranged, and the number of pole pairs is 16;
in the embodiment, the annular magnet 5 with multiple pairs of poles adopts radial magnetization.
As shown in fig. 3, the specific working process of the encoder in this embodiment is as follows: when the motor shaft 1 rotates, the coded disc 3 and the annular magnet 5 are driven to coaxially rotate, light emitted by the luminous tube 11 passes through the coded disc 3 to form moire fringes and projects the moire fringes to the receiver 12, the receiver 12 converts the moire fringes into analog quantity and transmits the analog quantity to the single-circle data acquisition chip 10, and the single-circle position value of the motor shaft 1 is calculated through a built-in algorithm. Meanwhile, the magnetic inductive chip 9 obtains the number of turns information by detecting the magnetic field change when the annular magnet 5 rotates, sends the information to the single-turn data acquisition chip 10, and finally completes the synchronization of the single-turn data and the multi-turn data in the single-turn data acquisition chip 10 to output a complete position value.
Claims (6)
1. An encoder, characterized by: the magnetic induction type single-ring magnetic encoder comprises a code wheel (3), a hollow cylindrical part (4), a multi-pair-pole annular magnet (5), a first circuit board (6), a second circuit board (8), a magnetic induction chip (9), a single-ring data acquisition chip (10), a light-emitting tube (11) and a receiver (12);
the coded disc (3) and the multiple pairs of polar annular magnets (5) are arranged on the hollow cylindrical piece (4) and are coaxial with the hollow cylindrical piece (4);
the first circuit board (6) and the second circuit board (8) are both parallel to the coded disc (3);
a magnetic induction chip (9) and a single-circle data acquisition chip (10) are arranged on the second circuit board (8), and the magnetic induction chip (9) is positioned in the magnetic field range of the multi-pair-pole annular magnet (5);
a light emitting tube (11) is arranged on the first circuit board (6), a receiver (12) is arranged on the second circuit board (8), and light rays emitted by the light emitting tube (11) pass through the coded disc (3) and are projected to the receiver (12);
the multiple pairs of polar ring magnets (5) are magnetized in the radial direction, and N, S poles are alternately arranged.
2. An encoder as claimed in claim 1, characterized in that: the first circuit board (6) and the second circuit board (8) are semi-annular.
3. An encoder as claimed in claim 2, characterized in that: the first circuit board (6) and the second circuit board (8) are connected through a support (7), and the support (7) is in a semi-surrounding shape.
4. An encoder as claimed in claim 1, characterized in that: the magnetic induction chip (9) is a Hall sensor.
5. An encoder as claimed in claim 1, characterized in that: the single-turn data acquisition chip (10) is a microprocessor chip MCU or a special chip ASIC.
6. An encoder as claimed in claim 1, characterized in that: the number of pole pairs of the multi-pair polar ring magnet (5) is 16, 32 or 64.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921355324.1U CN210375163U (en) | 2019-08-20 | 2019-08-20 | Encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921355324.1U CN210375163U (en) | 2019-08-20 | 2019-08-20 | Encoder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210375163U true CN210375163U (en) | 2020-04-21 |
Family
ID=70251812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921355324.1U Active CN210375163U (en) | 2019-08-20 | 2019-08-20 | Encoder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210375163U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112344969A (en) * | 2020-11-17 | 2021-02-09 | 湖南航天磁电有限责任公司 | Off-axis single-ring multi-antipode absolute magnetic encoder |
-
2019
- 2019-08-20 CN CN201921355324.1U patent/CN210375163U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112344969A (en) * | 2020-11-17 | 2021-02-09 | 湖南航天磁电有限责任公司 | Off-axis single-ring multi-antipode absolute magnetic encoder |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101846531B (en) | Multipole combined-type magnetic encoder | |
| CN107655510B (en) | Multi-turn absolute value encoder and position detection method | |
| US8111065B2 (en) | Sensor unit for a rotary encoder and a rotary encoder equipped with such a sensor unit | |
| CN101576396A (en) | Absolute magnetic-electric rotary encoder with low cost, high accuracy and multiple circles | |
| CN114858192A (en) | double-Hall magnetoelectric encoder based on double-wheel structure and angle calculating method thereof | |
| CN110044388B (en) | Application method of non-contact absolute angle position sensor of rotating body | |
| CN104634367A (en) | Magnetoelectric type absolute position sensor with large central hole structure and method for measuring absolute position | |
| CN210375163U (en) | Encoder | |
| CN103616040A (en) | Combined type optical-electricity encoder with copper code disc | |
| CN210922654U (en) | Magnetoelectric encoder based on giant magnetoresistance effect | |
| CN106197482A (en) | Finite angle encoder magnetic steel structure and there is the encoder of this magnetic steel structure | |
| CN207717105U (en) | A kind of passive wake-up formula encoder | |
| CN105387879A (en) | Absolute position magnetic encoder of large center hole axial magnetization structure | |
| CN112344970A (en) | Off-axis single-ring single-antipode absolute magnetic encoder | |
| CN202019274U (en) | Magnetic encoder for elevator door system | |
| WO2019192470A1 (en) | Sensor having backup signals from two channels | |
| CN207819699U (en) | A kind of contactless steering gear control system | |
| CN212518694U (en) | Multi-circle encoder and motor | |
| CN2874431Y (en) | Integrated rotary change coder | |
| TW201623921A (en) | Magnetic encoding device | |
| CN112060113A (en) | Linear displacement steering engine and robot finger steering engine system | |
| CN110071605B (en) | Motor mounting structure with electromagnetic induction type rotary transformer | |
| CN213812335U (en) | Coaxial non-contact double-encoder system | |
| CN201653433U (en) | Giant magnetoresistance magnetic encoder | |
| CN101877267B (en) | Magnetoconductive ring |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |