CN220170263U - Split type inductance encoder - Google Patents
Split type inductance encoder Download PDFInfo
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- CN220170263U CN220170263U CN202321537338.1U CN202321537338U CN220170263U CN 220170263 U CN220170263 U CN 220170263U CN 202321537338 U CN202321537338 U CN 202321537338U CN 220170263 U CN220170263 U CN 220170263U
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- rotor
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- code channel
- circuit board
- flexible circuit
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- 230000006698 induction Effects 0.000 claims abstract description 17
- 230000033001 locomotion Effects 0.000 claims abstract description 6
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- 230000005672 electromagnetic field Effects 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000005465 channeling Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 3
- 230000001939 inductive effect Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 4
- 150000003071 polychlorinated biphenyls Chemical class 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052755 nonmetal Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Abstract
The utility model discloses a split type inductance encoder which comprises a circular shell and a rotor coaxial with the shell, wherein a code channel is formed in the side wall of a curved surface of the rotor along the circumferential direction of the rotor, an induction unit for inducing the rotating motion state of the rotor is fixedly connected to the side wall of the curved surface of the shell, the induction unit is arranged in a surrounding manner along the circumferential direction of the shell, the induction unit is opposite to the code channel, a resolving plate for resolving the rotating position of the rotor is fixedly connected in the shell, and the resolving plate is connected with the induction unit. The utility model has the effect of reducing the influence of shaft channeling on the precision of the encoder.
Description
Technical Field
The utility model relates to the field of encoders, in particular to a split type inductance encoder
Background
For the measurement of high-speed servo motor position, the induction type encoder is an emerging application technology, can help the motor to realize light weight, realizes higher precision simultaneously, and the induction type encoder includes rotor and stator, and the rotor is fixed on the motor shaft, and the stator is fixed in the motor inboard, and the rotor is parallel with the stator, and the rotor is perpendicular with the motor shaft with the plane that the stator is located simultaneously.
However, the layout mode has higher requirements on the distance precision between the rotor and the stator in installation, meanwhile, because the internal environment of the high-speed motor is complex, and the problem of shaft channeling is obvious during high-speed operation, the shaft channeling can directly cause the distance between the rotor and the stator to change, the normal measurement distance required by an induction type technology can be exceeded, the measured position signal can directly cause jump, the precision of the encoder signal is finally directly influenced, and the motor can not work normally under extreme conditions.
Disclosure of Invention
In order to reduce the influence of shaft channeling on the precision of an encoder, the utility model provides a split type inductance encoder.
The utility model provides a split type inductance encoder, which adopts the following technical scheme:
the utility model provides a split type inductance encoder, is including being annular casing, with the coaxial rotor of casing, rotor curved surface lateral wall is provided with the sign indicating number way along its circumference, casing curved surface lateral wall fixedly connected with is used for the rotatory motion state's of induction rotor sensing unit, sensing unit encircles along the casing circumferencial direction and sets up, just sensing unit just sets up to the sign indicating number way, fixedly connected with is used for resolving rotor rotary position's resolving board in the casing, resolving board is connected with sensing unit.
Through adopting above-mentioned technical scheme, the motor shaft drives the rotor and rotates, and the sensing unit just is to the rotor code way, makes sensing unit can respond to the rotation state of rotor to with the signal feedback that senses to the resolving board, the resolving board receives the signal and carries out the resolving, obtains the rotatory position of rotor, thereby measures the motor shaft position, because casing and rotor are coaxial, and sensing unit encircles along the casing circumferencial direction and set up, thereby even the motor shaft takes place the axle and scurries, also can not influence the distance between sensing unit and the rotor code way, and then improves the precision of encoder.
Optionally, the induction unit includes the flexible circuit board of fixed connection in casing curved surface lateral wall, the resolving board is connected with the flexible circuit board, the flexible circuit board has laid exciting coil and receiving coil, and exciting coil surrounds the receiving coil setting, and exciting coil produces the excitation field, and the receiving coil receives the code channel's code signal and transmits to the resolving board and carry out the position resolving.
By adopting the technical scheme, the exciting coil generates an exciting electromagnetic field, an alternating electromagnetic field is generated around the code channel, and because of the eddy current effect, when the receiving coil passes through the code channel, inductance signals with different phases are received, then the receiving coil sends the received inductance signals to the resolving board, and the resolving board is used for resolving according to the inductance signals to obtain the movement position of the rotor.
Optionally, the flexible circuit board is fixedly connected with a compression ring for positioning along the circumference thereof.
Through adopting above-mentioned technical scheme, can be with the flexible circuit board stable fixed on casing curved surface lateral wall, prevent simultaneously that the flexible circuit board from removing.
Optionally, the code channel is a single code channel, the code channel includes position resolving coding information for the flexible circuit board to sense, and the resolving board resolves incremental position information of the rotor.
Optionally, the rotor is embedded with a magnet along a radial direction thereof, and the resolving plate is provided with a magnetic sensor for sensing the magnet.
Through adopting above-mentioned technical scheme, when flexible circuit board passed through the sign indicating number way, the resolving board was solved and is obtained the increment position of rotor, realizes incremental encoder, from this through setting up magnet, when the rotor rotated, the intensity and the direction of magnetic field of magnetic sensor perception magnet made magnetic sensor's induction signal parameter change, the resolving board detected the induction signal of change to confirm the position that the magnet that detects as incremental encoder's zero position.
Optionally, the code channel is a single code channel, the code channel comprises position resolving coding information for the flexible circuit board to sense, the number of cycles of the code channel is the same as the number of pole pairs of the motor connected with the encoder, so that the resolving board resolves the absolute angle of the motor magnet relative to the motor stator.
Through adopting above-mentioned technical scheme, because the cycle number of encoder code channel is the same with motor pole pair number, so realized the angle/phase place calculation in the single signal cycle, just know the absolute angle of current motor magnet relative motor stator, make the encoder can seek motor magnetic pole position fast, go up the electricity, more swift controls the motor to make flexible circuit board need not to encircle 360 degrees settings, only set up local flexible circuit board can.
Optionally, the code channels are double code channels, the number of the periods of the two code channels is equal to each other or the number of the periods is 1:N, wherein N is any positive integer, and the resolving board resolves the absolute position information of the rotor.
By adopting the technical scheme, the receiving coil senses the coded signals of the code channel and transmits the signals to the resolving board, and the resolving board can resolve the absolute position of the rotor based on the vernier resolving principle.
Optionally, the length of the code channel along the axial direction of the rotor is greater than the length of the flexible circuit board along the axial direction of the housing.
By adopting the technical scheme, the axial displacement tolerance is increased, and even in the application scene of large axial displacement, the flexible circuit board can still be mutually induced with the code channel to detect the code channel signal, so that the detection stability of the encoder is improved.
Optionally, the code channel embodies the encoded information by providing a plurality of metal teeth or metal grids.
Optionally, the code channel is formed by a flexible PCB, and a plurality of metal grids are distributed in the flexible PCB to embody code channel coding information.
Drawings
Fig. 1 is a schematic overall structure of a first embodiment of the present utility model.
Fig. 2 is a schematic view of an internal structure of a housing according to an embodiment of the present utility model, which mainly shows a connection structure between the housing and a flexible circuit board.
Fig. 3 is an exploded view of the housing and the rotor in the first embodiment of the present utility model, which mainly shows a connection structure among the housing, the flexible circuit board and the compression ring.
Fig. 4 is an exploded view of a rotor and a code channel in a second embodiment of the present utility model, which mainly shows a structure between a magnet and the rotor.
Reference numerals illustrate:
1. a housing; 2. a rotor; 21. coding a channel; 22. a magnet; 3. an induction unit; 31. a flexible circuit board; 4. a resolving board; 41. a magnetic sensor; 5. and a compression ring.
Detailed Description
The utility model is described in further detail below with reference to fig. 1-4.
The embodiment of the utility model discloses a split type inductance encoder.
Embodiment one:
referring to fig. 1 and 2, a split type induction encoder includes a housing 1, a rotor 2 coaxial with the housing 1, the housing 1 is hollow and annular, and a code channel 21 is provided on a curved side wall of the rotor 2 along a circumferential direction thereof. The casing 1 adopts non-metal material, and the vertical curved surface inside wall fixedly connected with of casing 1 is used for the rotatory motion of induction rotor 2's induction element 3, and induction element 3 includes the flexible circuit board 31 that is fixed in the vertical curved surface inside wall of casing 1 through gluing, and flexible circuit board 31 encircles the setting along casing 1 circumferencial direction, makes flexible circuit board 31 surround rotor 2 through the vertical curved surface side wall of casing 1 encircles, and flexible circuit board 31 just sets up to the code way 21. The vertical curved side wall of the shell 1 can keep concentricity between the flexible circuit board 31 and the rotor 2, and meanwhile, the shell 1 is made of a nonmetal material, so that signal transmission of the flexible circuit board 31 is not interfered, further, the measuring distance between the flexible circuit board 31 and the code channel 21 of the rotor 2 is kept unchanged, and when a motor shaft is in shaft channeling, the measuring of an encoder is not influenced.
Referring to fig. 1 and 2, a resolving board 4 for resolving the rotation position of the rotor 2 is fixed inside the housing 1 by screws, the resolving board 4 and the flexible circuit board 31 are integrally formed, and a signal processing circuit for processing and resolving the detection signal is burnt on the resolving board 4, and the signal processing circuit is of the prior art, so that details are not repeated here.
Referring to fig. 1 and 2, the flexible circuit board 31 is provided with an exciting coil and a receiving coil (not shown), the exciting coil is disposed around the receiving coil, the exciting coil generates an exciting electromagnetic field, so that an alternating electromagnetic field is generated around the code channel 21, inductance signals of different phases are received when the receiving coil passes through the grid of the code channel 21 due to an eddy current effect, and the receiving coil transmits the inductance signals received by the code channel 21 to the resolving board 4, so that the resolving board 4 performs position resolving.
Referring to fig. 3, in this embodiment, the code channels 21 are double code channels, the code channels 21 embody coding information by arranging a plurality of metal teeth or metal grids at equal intervals, in other embodiments, the code channels 21 may be formed by flexible PCBs, and a plurality of metal grids are arranged in the flexible PCBs to embody coding information of the code channels, and then the flexible PCBs are bonded on the outer curved surface of the rotor 2. Secondly, the cycle number of the two code channels 21 is equal to each other or the cycle number ratio is 1:N, wherein N is any positive integer, so that the receiving coil senses the coded signals of the code channels 21 and transmits the signals to the resolving board 4, and the resolving board 4 resolves the received signals through a vernier resolving principle, so that the absolute position of the rotor 2 can be resolved.
Referring to fig. 3, the periphery of the upper end of the flexible circuit board 31 is provided with a pressing ring 5 for positioning the flexible circuit board 31 by means of an adhesive fixing sleeve, so that the flexible circuit board 31 can be tightly attached to the inner wall of the housing 1, and the position of the flexible circuit board 31 is firmer. And the length of the code channel 21 along the axial direction of the rotor 2 is larger than that of the flexible circuit board 31 along the axial direction of the shell 1, so that the flexible circuit board 31 can still sense the coding information on the code channel 21 even in the case of large shaft channeling of a motor shaft, the detection precision of an encoder can not be influenced even in the case of large shaft channeling, and the detection stability of the encoder is improved.
Embodiment two:
the present embodiment differs from the first embodiment in that: referring to fig. 4, the code tracks 21 are provided as a single code track, and the code tracks 21 contain position-resolving code information for the flexible circuit board 31 to sense, and the flexible circuit board 31 feeds back the sensed code signals to the resolving board 4, and the resolving board 4 resolves the incremental positions of the rotor 2. The rotor 2 is embedded with the magnet 22 along the radial direction, the magnet 22 can be adhered in the slot of the rotor 2 through glue, the resolving plate 4 is fixed with the magnetic sensor 41 for sensing the magnet, and the magnetic sensor 41 adopts a Hall sensor. When the rotor 2 rotates, the Hall sensor senses the intensity and the direction of the magnetic field of the magnet 22, so that the sensing signal parameters of the Hall sensor are changed, the resolving board 4 detects the sensing signal of the Hall sensor, and the detected position of the magnet 22 is determined as the reference zero position of the incremental encoder, so that the motion state of the rotor 2 is detected.
Embodiment III:
the difference between this embodiment and the second embodiment is that: the number of periods of the code channel 21 is the same as the number of pole pairs of the motor connected with the encoder, so that the calculation of angles/phases in a single signal period is realized, the absolute position output of a corresponding motor stator in a single magnetic pole of the corresponding motor is further realized, the encoder can quickly find the position of the magnetic pole of the motor and power on, the encoder can control the motor more conveniently and quickly, and as the magnetic poles in the motor are uniformly distributed along the circumferential direction, the motor can be controlled when the absolute position in one of the magnetic poles of the motor is known, and therefore, the flexible circuit board 31 does not need to be arranged around 360 degrees, and only the local flexible circuit board 31 is arranged, so that the motor can be controlled.
The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.
Claims (10)
1. A split inductor encoder, characterized by: including being annular casing (1), with casing (1) coaxial rotor (2), rotor (2) curved surface lateral wall is provided with sign indicating number way (21) along its circumference, casing (1) curved surface lateral wall fixedly connected with is used for inducting rotor (2) rotatory motion's sensing unit (3), sensing unit (3) are along casing (1) circumferencial direction surrounding the setting, just sensing unit (3) just set up to sign indicating number way (21), fixedly connected with is used for resolving board (4) of rotor (2) rotary position in casing (1), resolving board (4) are connected with sensing unit (3).
2. A split inductor encoder according to claim 1, wherein: the induction unit (3) comprises a flexible circuit board (31) fixedly connected to the curved side wall of the shell (1), the resolving board (4) is connected with the flexible circuit board (31), an exciting coil and a receiving coil are arranged on the flexible circuit board (31), the exciting coil surrounds the receiving coil, the exciting coil generates an exciting electromagnetic field, and the receiving coil receives coded signals of the code channel (21) and transmits the coded signals to the resolving board (4) for position resolving.
3. A split inductor encoder according to claim 2, wherein: the flexible circuit board (31) is fixedly connected with a compression ring (5) used for positioning along the circumferential direction of the flexible circuit board.
4. A split inductor encoder according to claim 2, wherein: the code channel (21) is a single code channel, the code channel (21) comprises position resolving coding information which is sensed by the flexible circuit board (31), and the resolving board (4) resolves incremental position information of the rotor (2).
5. The split inductor encoder of claim 4 wherein: the rotor (2) is embedded with magnets (22) along the radial direction of the rotor, and the resolving plate (4) is provided with a magnetic sensor (41) for sensing the magnets (22).
6. A split inductor encoder according to claim 2, wherein: the code channel (21) is a single code channel, the code channel (21) comprises position resolving coding information for sensing by the flexible circuit board (31), the number of cycles of the code channel (21) is the same as the pole pair number of a motor connected with the encoder, and the resolving board (4) is used for resolving the absolute angle of the motor magnet relative to the motor stator.
7. A split inductor encoder according to claim 1, wherein: the code channels (21) are double code channels, the number of periods of the two code channels (21) is equal to each other or is 1:N, wherein N is any positive integer, and the resolving board (4) resolves absolute position information of the rotor (2).
8. A split inductor encoder according to claim 2, wherein: the length of the code channel (21) along the axial direction of the rotor (2) is longer than the length of the flexible circuit board (31) along the axial direction of the shell (1).
9. A split inductor encoder according to claim 1, wherein: the code channel (21) embodies coded information by arranging a plurality of metal teeth or metal grids.
10. A split inductor encoder according to claim 1, wherein: the code channel (21) is formed by a flexible PCB, and a plurality of metal grids are distributed in the flexible PCB to embody code channel coding information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321537338.1U CN220170263U (en) | 2023-06-15 | 2023-06-15 | Split type inductance encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321537338.1U CN220170263U (en) | 2023-06-15 | 2023-06-15 | Split type inductance encoder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220170263U true CN220170263U (en) | 2023-12-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321537338.1U Active CN220170263U (en) | 2023-06-15 | 2023-06-15 | Split type inductance encoder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220170263U (en) |
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2023
- 2023-06-15 CN CN202321537338.1U patent/CN220170263U/en active Active
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