CN215810904U - Multi-circle encoder - Google Patents
Multi-circle encoder Download PDFInfo
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- CN215810904U CN215810904U CN202121220813.3U CN202121220813U CN215810904U CN 215810904 U CN215810904 U CN 215810904U CN 202121220813 U CN202121220813 U CN 202121220813U CN 215810904 U CN215810904 U CN 215810904U
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Abstract
The utility model discloses a multi-turn encoder which is used for counting the number of turns of the encoder and comprises a rotor, a circuit board and a plurality of induction coils, wherein the rotor is provided with a detection code channel, and the detection code channel comprises a metal code channel and a non-metal code channel. The multi-turn encoder disclosed by the utility model performs multi-turn counting through the inductive switch, and the inductive switch has the characteristics of pollution resistance, vibration resistance, high environmental reliability and the like according to the inductive principle, and can be attached to encoders of various principles to realize the multi-turn counting function.
Description
Technical Field
The utility model belongs to the technical field of encoders, and particularly relates to a multi-turn encoder.
Background
The multi-turn absolute value encoder has the advantages of unique encoding and high precision during multi-turn operation, does not need to find a zero point during application, and is widely applied to position detection of controlled equipment in various automatic control occasions. The multi-turn encoder is implemented in several modes, one mode is powered by an external battery, and the mode of actively awakening or passively awakening the single chip microcomputer so as to perform rotation judgment and turn number recording is called an electronic multi-turn mode. The electronic multi-turn mode has the advantages of small volume and low cost.
At present, the common electronic multi-turn mode has two main device combination modes. One is that magnetic principle is utilized, magnetic head which is divided by south and north pole conversion acts on magnetic induction device, voltage of magnetic induction device is utilized to wake up single chip microcomputer along variation, or single chip microcomputer actively wakes up to read level state of magnetic induction device, rotation judgment is carried out, corresponding information is written into memory when number of turns is increased or decreased, and number of turns is recorded. One type is that the rotation judgment is carried out by utilizing the optical principle and through a mode of actively awakening and reading the grating position code by a singlechip, and corresponding information is written into a memory when the number of turns is increased or reduced, so that the number of turns is recorded.
In the above two methods, the magnetic principle must have a magnetic grid in implementation, and when the principle is used for implementation on an optical encoder, the magnetic grid and a corresponding magnetic induction device are inevitably added, so that the cost and the volume are increased. When the principle is used on a magnetic grid encoder, a code channel for counting a plurality of circles generates magnetic interference with a track for calculating the position of a single circle, so that a larger product volume is needed, and the precision is reduced; the multi-turn counting of the optical principle has strict requirements on the environment, so that when the multi-turn counting is applied to other encoders which do not need to be protected, extra structural protection cost can be brought, and the risk of counting loss caused by pollution is caused.
Therefore, the above problems are further improved.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a multi-turn encoder which counts a plurality of turns through an inductive switch, wherein the inductive switch has the characteristics of pollution resistance, vibration resistance, high environmental reliability and the like according to the inductive principle, and can be added to encoders with various principles to realize the multi-turn counting function.
In order to achieve the above object, the present invention provides a multi-turn encoder for counting multiple turns of the encoder, comprising a rotor, a circuit board and a plurality of induction coils (the shape of the induction coil is preferably circular, and other shapes can be selected), wherein:
the rotor is provided with a detection code channel, and the detection code channel comprises a metal code channel and a non-metal code channel (the areas of the metal code channel and the non-metal code channel can be distributed as required, and the detection code channel is preferably a half circle of the metal code channel and a half circle of the non-metal code channel);
the circuit board is positioned above the rotor and comprises a reading device (for reading) and a signal processing circuit (for processing signals obtained by detection of the induction coil so as to obtain the number of turns);
the induction coil is electrically connected with the circuit board (or can be directly installed inside the circuit board through a circuit board process), and the induction coil is used for inducing the running state (including the position and the rotation angle) of the metal code channel.
As a more preferable mode of the above-mentioned mode, the rotor is a double track magnetic grid rotor, and a metal sheet (as a metal track) made of a non-magnetic material is attached to a magnetic grid track.
As a further preferable technical solution of the above technical solution, the induction coil includes a first induction coil and a second induction coil, the first induction coil and the second induction coil are respectively electrically connected to the circuit board, and a central connecting line of the first induction coil and the second induction coil and the rotor forms a certain angle (preferably 90 °).
As a further preferable technical solution of the above technical solution, the induction coil further includes a third induction coil and a fourth induction coil, the third induction coil and the fourth induction coil are respectively electrically connected to the circuit board, and the third induction coil and the fourth induction coil are disposed opposite to the first induction coil and the second induction coil.
As a further preferable technical solution of the above technical solution, the rotor is a double-code-channel inductive rotor, the double-code-channel inductive rotor includes an inner ring and an outer ring, and the metal code channel and the non-metal code channel are both disposed on the inner ring.
As a further preferable technical solution of the above technical solution, the induction coil includes a first induction coil and a second induction coil, the first induction coil and the second induction coil are respectively electrically connected to the circuit board, and a central connecting line of the first induction coil and the second induction coil and the rotor forms a certain angle (preferably 90 °).
As a further preferable technical solution of the above technical solution, the induction coil further includes a third induction coil and a fourth induction coil, the third induction coil and the fourth induction coil are respectively electrically connected to the circuit board, and the third induction coil and the fourth induction coil are disposed opposite to the first induction coil and the second induction coil.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of a multi-turn encoder of the present invention.
Fig. 2 is a schematic structural diagram of a second embodiment of the multi-turn encoder of the present invention.
Fig. 3 is a schematic structural diagram of a third embodiment of the multi-turn encoder of the present invention.
The reference numerals include: 1. a rotor; 11. non-metal code channel; 12. metal code channel; 21. a first induction coil; 22. a second induction coil; 23. a reading device.
Detailed Description
The following description is presented to disclose the utility model so as to enable any person skilled in the art to practice the utility model. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the utility model, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the utility model.
The present invention discloses a multi-turn encoder, and the following describes the specific embodiments of the present invention in combination with the preferred embodiments.
In the embodiments of the present invention, those skilled in the art note that the housing, the circuit board, and the like related to the present invention can be regarded as the prior art.
A first embodiment (as shown in figure 1).
The utility model discloses a multi-turn encoder, which is used for counting the number of turns of the encoder and comprises a rotor 1, a circuit board and a plurality of induction coils (the shape of the induction coils is preferably circular, and other shapes can be selected), wherein:
the rotor 1 is provided with (multiple circles of) detection code channels, and the detection code channels comprise metal code channels 12 and non-metal code channels 11 (the areas of the metal code channels and the non-metal code channels can be distributed according to requirements, preferably, the areas of the metal code channels and the non-metal code channels are half circles of the metal code channels and half circles of the non-metal code channels, and the rotor is connected with a detected shaft);
the circuit board is located above the rotor 1 and comprises a reading device (for reading) and a signal processing circuit (for processing the signals detected by the induction coils so as to obtain the number of turns);
the induction coil is electrically connected with the circuit board (or can be directly installed inside the circuit board through a circuit board process), and the induction coil is used for inducing the running state (including the position and the rotation angle) of the metal code channel 12.
Specifically, the induction coil includes a first induction coil 21 and a second induction coil 22, the first induction coil 21 and the second induction coil 22 are respectively electrically connected to the circuit board, and a central connecting line between the first induction coil 21 and the rotor 1 and a central connecting line between the second induction coil 22 and the rotor 1 form a certain angle (preferably 90 °).
More specifically, the induction coil further includes a third induction coil and a fourth induction coil, the third induction coil and the fourth induction coil are electrically connected to the circuit board, and the third induction coil and the fourth induction coil are disposed opposite to the first induction coil and the second induction coil (four induction coils can be disposed, a center of the induction coil and a center connecting line of a rotor center are disposed at 90 ° to each other, wherein 180 ° to each other are a differential pair, and a total of two differential pairs, and a plurality of encoder turns are counted for a change in a metal position of the rotor by using the two differential pairs).
Preferably, when the encoder operates, the rotor 1 rotates along the axis, when the metal track 12 rotates to the position below the induction coil, the induction electromagnetic field generated by the induction coil is dissipated by the eddy current effect of the metal layer, the electromagnetic parameters of the induction coil change, and the circuit board detects the change of the induction coil, so that whether the current metal track of the rotor is below the induction coil can be known.
Preferably, the first induction coil 21 and the second induction coil 22 are recorded as H when they detect that the metal track 12 exists below, and recorded as L when they detect that the non-metal track 11 exists below, so that all the states of the first induction coil 21 and the second induction coil 22 can be recorded as HH, HL, LL, and LH, and the current approximate position of the rotor can be known from the states reflected by the induction coils. By detecting the state changes of the two inductance coils, the current rotor is in forward rotation or reverse rotation, for example, the state change of the two coils follows the change of HH → HL → LL → LH, and then the rotor is in forward rotation, otherwise, the rotor is in reverse rotation; by detecting the state changes of the two inductance coils, whether the rotor rotates for a whole circle can be known, if the state changes of the two coils return to HH from HH along the positive rotation direction, the rotor is judged to rotate for 1 circle in the positive rotation, the number of circles is +1, otherwise, the rotor is-1.
Through the above steps, the rotation state of the encoder rotor is completely recognized and judged, so that the number of turns can be recorded by using the signal
A second embodiment (shown in figure 2).
The utility model discloses a multi-turn encoder, which is used for counting the number of turns of the encoder and comprises a rotor 1, a circuit board and a plurality of induction coils (the shape of the induction coils is preferably circular, and other shapes can be selected), wherein:
the rotor 1 is provided with (multiple circles of) detection code channels, and the detection code channels comprise metal code channels 12 and non-metal code channels 11 (the areas of the metal code channels and the non-metal code channels can be distributed according to requirements, preferably, the areas of the metal code channels and the non-metal code channels are half circles of the metal code channels and half circles of the non-metal code channels, and the rotor is connected with a detected shaft);
the circuit board is located above the rotor 1 and comprises a reading device 23 (for reading) and a signal processing circuit (for processing the signals detected by the induction coils so as to obtain a number of turns);
the induction coil is electrically connected with the circuit board (or can be directly installed inside the circuit board through a circuit board process), and the induction coil is used for inducing the running state (including the position and the rotation angle) of the metal code channel 12.
Specifically, the rotor 1 is a double-track magnetic grid rotor, and a metal sheet (as a metal track) made of a non-magnetic material is adhered to the magnetic grid track.
Specifically, the induction coil includes a first induction coil 21 and a second induction coil 22, the first induction coil 21 and the second induction coil 22 are respectively electrically connected to the circuit board, and a central connecting line between the first induction coil 21 and the rotor 1 and a central connecting line between the second induction coil 22 and the rotor 1 form a certain angle (preferably 90 °).
More specifically, the induction coil further includes a third induction coil and a fourth induction coil, the third induction coil and the fourth induction coil are electrically connected to the circuit board, and the third induction coil and the fourth induction coil are disposed opposite to the first induction coil and the second induction coil (four induction coils can be disposed, a center of the induction coil and a center connecting line of a rotor center are disposed at 90 ° to each other, wherein 180 ° to each other are a differential pair, and a total of two differential pairs, and a plurality of encoder turns are counted for a change in a metal position of the rotor by using the two differential pairs).
Preferably, when the encoder operates, the magnetic grid rotor 1 rotates along the axis, and the reading device 23 acquires grid magnetic field information of the magnetic grid, so that the current rotation angle can be calculated, and an angle output is formed.
When the metal sheet (metal track) 12 area rotates to the lower part of the inductance coil, the induction electromagnetic field generated by the inductance coil is dissipated by the eddy current effect of the metal layer, the electromagnetic parameter of the induction coil changes, and the circuit board detects the change of the induction coil, so that whether the current rotor metal track is below the inductance coil can be known.
The first induction coil 21 and the second induction coil 22 are recorded in a state H when they detect that there is a metal foil below them, and in a state L when they detect that there is no metal foil below them, all the states in which the first induction coil 21 and the second induction coil 22 exist can be recorded as HH, HL, LL, and LH, and the current approximate position of the rotor can be known from the states reflected by the induction coils. By detecting the state changes of the two inductance coils, the current rotor is in forward rotation or reverse rotation, for example, the state change of the two coils follows the change of HH → HL → LL → LH, and then the rotor is in forward rotation, otherwise, the rotor is in reverse rotation; by detecting the state changes of the two inductance coils, whether the rotor rotates for a whole circle can be known, if the state changes of the two coils return to HH from HH along the positive rotation direction, the rotor is judged to rotate for 1 circle in the positive rotation, the number of circles is +1, otherwise, the rotor is-1.
Through the above steps, the rotation state of the encoder rotor is completely recognized and judged, so that the number of turns can be recorded using the signal.
A third embodiment (shown in figure 3).
The utility model discloses a multi-turn encoder, which is used for counting the number of turns of the encoder and comprises a rotor 1, a circuit board, a shell and a plurality of induction coils (the shape of the induction coils is preferably circular, and other shapes can be selected), wherein:
the rotor 1 is provided with (multiple circles of) detection code channels, and the detection code channels comprise metal code channels 12 and non-metal code channels 11 (the areas of the metal code channels and the non-metal code channels can be distributed according to requirements, preferably, the areas of the metal code channels and the non-metal code channels are half circles of the metal code channels and half circles of the non-metal code channels, and the rotor is connected with a detected shaft);
the circuit board is located above the rotor 1 and comprises a reading device (for reading) and a signal processing circuit (for processing the signals detected by the induction coils so as to obtain the number of turns);
the induction coil is electrically connected with the circuit board (or can be directly installed inside the circuit board through a circuit board process), and the induction coil is used for inducing the running state (including the position and the rotation angle) of the metal code channel 12.
Specifically, the rotor 1 is a double-code-channel inductive rotor, the double-code-channel inductive rotor comprises an inner ring and an outer ring, and the metal code channel and the nonmetal code channel are both arranged on the inner ring.
Specifically, the induction coil includes a first induction coil 21 and a second induction coil 22, the first induction coil 21 and the second induction coil 22 are respectively electrically connected to the circuit board, and a central connecting line between the first induction coil 21 and the rotor 1 and a central connecting line between the second induction coil 22 and the rotor 1 form a certain angle (preferably 90 °).
More specifically, the induction coil further includes a third induction coil and a fourth induction coil, the third induction coil and the fourth induction coil are electrically connected to the circuit board, and the third induction coil and the fourth induction coil are disposed opposite to the first induction coil and the second induction coil (four induction coils can be disposed, a center of the induction coil and a center connecting line of a rotor center are disposed at 90 ° to each other, wherein 180 ° to each other are a differential pair, and a total of two differential pairs, and a plurality of encoder turns are counted for a change in a metal position of the rotor by using the two differential pairs).
The encoder rotor 1 is an inductive encoder rotor with double code channels and comprises an inner ring and an outer ring. Wherein, the inner track is a metal track 12 in a half circle, and the other half circle is a nonmetal track 11. The circuit board (including reading coil, signal processing circuit) of the encoder is above the rotor 1, there are two first induction coils 21 and the second induction coil 22 in the corresponding area above 11 and 12 in the circuit board, the line of the first induction coil 21 and the second induction coil 22 rotor center is 90 °. The first induction coil 21 and said second induction coil 22 are in communication with the circuit of the circuit board.
When the encoder operates, the rotor 1 rotates along the axis, and the reading coil reads the code channel information of the inner and outer rings, so that the current rotor rotation angle can be calculated, and angle output is formed.
When the metal code channel 12 area rotates to the lower part of the inductance coil, the induction electromagnetic field generated by the inductance coil is dissipated by the eddy current effect of the metal layer, the electromagnetic parameter of the induction coil changes, and the circuit board detects the change of the induction coil, so that whether the current rotor metal code channel is below the inductance coil can be known.
The first induction coil 21 and the second induction coil 22 are recorded in a state H when they detect that there is a metal track below, and in a state L when they detect that there is no metal track below, all the states of the first induction coil 21 and the second induction coil 22 can be recorded as HH, HL, LL, and LH, and the current approximate position of the rotor can be known from the states reflected by the induction coils. By detecting the state changes of the two inductance coils, the current rotor is in forward rotation or reverse rotation, for example, the state change of the two coils follows the change of HH → HL → LL → LH, and then the rotor is in forward rotation, otherwise, the rotor is in reverse rotation; by detecting the state changes of the two inductance coils, whether the rotor rotates for a whole circle can be known, if the state changes of the two coils return to HH from HH along the positive rotation direction, the rotor is judged to rotate for 1 circle in the positive rotation, the number of circles is +1, otherwise, the rotor is-1.
Through the above steps, the rotation state of the encoder rotor is completely recognized and judged, so that the number of turns can be recorded using the signal.
It should be noted that the technical features of the housing, the circuit board, and the like related to the present patent application should be regarded as the prior art, and the specific structure, the operation principle, the control mode and the spatial arrangement mode of the technical features may be conventional in the art, and should not be regarded as the utility model point of the present patent, and the present patent is not further specifically described in detail.
It will be apparent to those skilled in the art that modifications and equivalents may be made in the embodiments and/or portions thereof without departing from the spirit and scope of the present invention.
Claims (7)
1. The utility model provides a many rings of encoders for many rings of counts of encoder, its characterized in that includes rotor, circuit board and a plurality of induction coil, wherein:
the rotor is provided with a detection code channel, and the detection code channel comprises a metal code channel and a non-metal code channel;
the circuit board is positioned above the rotor and includes a reading device and a signal processing circuit;
the induction coil is electrically connected with the circuit board and used for inducing the running state of the metal code channel.
2. A multi-turn encoder according to claim 1, wherein the rotor is a double track magnetic grid rotor having non-magnetic metal plates adhered to the tracks.
3. The multi-turn encoder according to claim 2, wherein the induction coil comprises a first induction coil and a second induction coil, the first induction coil and the second induction coil are electrically connected to the circuit board, respectively, and the first induction coil and the second induction coil are at a certain angle with a central connecting line of the rotor.
4. The multi-turn encoder according to claim 3, wherein the induction coils further comprise a third induction coil and a fourth induction coil, the third induction coil and the fourth induction coil are electrically connected to the circuit board respectively, and the third induction coil and the fourth induction coil are disposed opposite to the first induction coil and the second induction coil.
5. The multi-turn encoder according to claim 1, wherein the rotor is a dual-track inductive rotor comprising an inner turn and an outer turn, the metallic track and the non-metallic track being disposed on the inner turn.
6. The multi-turn encoder according to claim 5, wherein the induction coil comprises a first induction coil and a second induction coil, the first induction coil and the second induction coil are electrically connected to the circuit board, respectively, and the first induction coil and the second induction coil are at a certain angle with a central connecting line of the rotor.
7. The multi-turn encoder according to claim 6, wherein the induction coils further comprise a third induction coil and a fourth induction coil, the third induction coil and the fourth induction coil are electrically connected to the circuit board respectively, and the third induction coil and the fourth induction coil are disposed opposite to the first induction coil and the second induction coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121220813.3U CN215810904U (en) | 2021-06-02 | 2021-06-02 | Multi-circle encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121220813.3U CN215810904U (en) | 2021-06-02 | 2021-06-02 | Multi-circle encoder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215810904U true CN215810904U (en) | 2022-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121220813.3U Active CN215810904U (en) | 2021-06-02 | 2021-06-02 | Multi-circle encoder |
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| Country | Link |
|---|---|
| CN (1) | CN215810904U (en) |
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2021
- 2021-06-02 CN CN202121220813.3U patent/CN215810904U/en active Active
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