CN220794262U - Linear inductance absolute value encoder - Google Patents
Linear inductance absolute value encoder Download PDFInfo
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- CN220794262U CN220794262U CN202321032321.0U CN202321032321U CN220794262U CN 220794262 U CN220794262 U CN 220794262U CN 202321032321 U CN202321032321 U CN 202321032321U CN 220794262 U CN220794262 U CN 220794262U
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 230000005284 excitation Effects 0.000 claims description 7
- 239000004593 Epoxy Substances 0.000 claims description 4
- 229910052755 nonmetal Inorganic materials 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 1
- 230000005672 electromagnetic field Effects 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The application discloses absolute value encoder of linear inductance, including reading plate and relative parallel arrangement's bars chi, its characterized in that: the grid ruler is provided with a single code channel along the length direction of the grid ruler, one side of the reading plate facing the grid ruler is provided with a reading unit for outputting an increment position signal and an absolute position signal according to the displacement of the grid ruler, and the reading plate is provided with a signal processing circuit for calculating and subdividing according to the absolute position signal and the increment position signal to obtain the absolute position of the reading plate relative to the grid ruler. The method has the effect of realizing the absolute value and simultaneously reducing the width of the grid ruler.
Description
Technical Field
The present application relates to the field of encoders, and in particular, to a linear inductance absolute value encoder.
Background
In a linear motor servo system, the position detection of a motor sliding seat is a critical ring, an encoder is generally used for feeding back the position of the motor sliding seat, and a grating ruler of the encoder and a reading plate are arranged in a relatively moving mode, so that when a motor operates, the reading plate moves relatively to the grating ruler to detect, and the position of the motor sliding seat is fed back.
Under the high precision requirement, an absolute value encoder is usually used, but the grid size channels of the absolute value encoder are generally at least two, so that the width of the grid ruler is enlarged, the miniaturization of products is not facilitated, and the application scene is limited.
Disclosure of Invention
In order to reduce the width of the grid ruler under the condition of realizing the absolute value, the application provides a linear inductance absolute value encoder.
The application provides a linear inductance absolute value encoder which adopts the following technical scheme:
the utility model provides a straight line inductance absolute value encoder, includes reading plate and its relative parallel arrangement's bars chi, its characterized in that: the grid ruler is provided with a single code channel along the length direction of the grid ruler, one side of the reading plate facing the grid ruler is provided with a reading unit for outputting an increment position signal and an absolute position signal according to the displacement of the grid ruler, and the reading plate is provided with a signal processing circuit for calculating and subdividing according to the absolute position signal and the increment position signal to obtain the absolute position of the reading plate relative to the grid ruler.
By adopting the technical scheme, the grating ruler and the reading plate move relatively, the reading unit is opposite to a single code channel of the grating ruler, the displacement of the grating ruler is identified, the low-resolution absolute position signal and the high-resolution increment position signal are respectively output, the signal processing circuit receives the two groups of position signals, the coarse position of the grating ruler is calculated according to the absolute position signals, the fine position of the grating ruler is obtained according to the increment position signals, and therefore the unique absolute position of the reading plate relative to the grating ruler is obtained by combining the two signals, the single code channel of the grating ruler realizes the absolute value, and the width of the grating ruler is reduced.
Optionally, the reading unit includes setting up in the excitation coil, first set of receiving coil and second set of receiving coil of reading plate, the ratio of the number of receiving window cycles of first set of receiving coil and second set of receiving coil satisfies 1: n, wherein N >1, the first set of receiving coils and the second set of receiving coils are arranged on the reading plate in a stacked manner and face the single code channel, the single cycle length of the second set of receiving coils is equal to or smaller than the single cycle length of Shan Ma channels, the exciting coils are arranged around the first set of receiving coils and the second set of receiving coils, and when the grid ruler and the reading plate relatively move, the first set of receiving coils and the second set of receiving coils output absolute position signals and incremental position signals respectively.
By adopting the technical scheme, the exciting coil sends out a high-frequency exciting signal and generates an alternating electromagnetic field, when the grating ruler moves relative to the reading plate, the first group of receiving coils output absolute position signals because the signals output by the first group of receiving coils are single period, the second group of receiving coils output increment position signals, the signal processing circuit of the resolving plate calculates the absolute position with low resolution according to the absolute position signals, then calculates the increment position with high resolution according to the increment position signals, and the absolute position with low resolution and the increment position with high resolution are combined, so that the absolute position with high resolution of the grating ruler relative to the reading plate can be calculated.
Optionally, the reading board includes a coil board for laying reading units and a resolving board for laying signal processing circuits, and the coil board is fixedly connected with the resolving board.
Optionally, the single code channel is formed by alternately forming metal areas and nonmetal areas at intervals.
By adopting the technical scheme, the excitation coil sends out a high-frequency excitation signal and generates an alternating electromagnetic field, when the grating ruler moves, the alternating electromagnetic field is influenced by a metal area of a single code channel, so that the space electromagnetic field is changed, and the space electromagnetic field is received by the first group of receiving coils and the second group of receiving coils and respectively outputs an absolute position signal and an incremental position signal.
Optionally, the single code channel is made of metal, and the single code channel is formed by alternately forming grooves and protrusions at intervals.
Optionally, a pin header for electrical connection is fixedly connected between the coil board and the resolving board.
Through adopting above-mentioned technical scheme, carry out electric connection with coil board and resolving board through the row needle, reduce the interference of the component on the resolving board on the coil board.
Optionally, the coil board is fixedly connected with a connecting plate, and one side of the connecting plate back to the coil board is fixedly connected with the resolving plate.
Through adopting above-mentioned technical scheme, through connecting plate fixed coil board and resolving plate, make both positions more firm.
Optionally, the connection plate is an epoxy plate.
By adopting the technical proposal, the epoxy plate plays a role in fixation, and can also play an insulating role.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the grating ruler and the reading plate move relatively, the reading unit is opposite to a single code channel of the grating ruler, the displacement of the grating ruler is recognized, a low-resolution absolute position signal and a high-resolution increment position signal are respectively output, the signal processing circuit receives the two groups of position signals, the coarse position of the grating ruler is calculated according to the absolute position signals, the fine position of the grating ruler is obtained according to the increment position signals, and therefore the unique absolute position of the reading plate relative to the grating ruler is obtained through combination of the two positions, the absolute value of the single code channel of the grating ruler is realized, and the width of the grating ruler is reduced.
2. The coil board is electrically connected with the resolving board through the pin header, so that the interference of the element on the resolving board on the coil board is reduced.
Drawings
Fig. 1 is a schematic overall structure of an embodiment of the present application.
Fig. 2 is a schematic structural view of a grating ruler in an embodiment of the present application.
Fig. 3 is a schematic view of the structure of the reading plate in the embodiment of the present application.
Fig. 4 is a schematic structural view of a coil plate in the embodiment of the present application.
Reference numerals illustrate:
1. a reading plate; 2. a grid ruler; 21. a single code channel; 11. a coil plate; 12. a resolving board; 3. arranging needles; 4. a connecting plate; 5. a reading unit; 51. an exciting coil; 52. a first set of receive coils; 53. the second set of receive coils.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-4.
The embodiment of the application discloses a linear inductance absolute value encoder.
Referring to fig. 1, 2 and 3, a linear inductance absolute value encoder includes a reading board 1 and a grating ruler 2 disposed in parallel relative to the reading board, wherein the grating ruler 2 is provided with single tracks 21 along a length direction of the grating ruler, the single tracks 21 are alternately arranged by metal areas and nonmetal areas, the metal areas are made of rectangular copper foil in the embodiment, and the single tracks can be made of metal in other embodiments and are alternately formed by grooves and protrusions. The reading board 1 comprises a coil board 11 facing the grid ruler 2 and a resolving board 12 fixed on one side, deviating from the grid ruler 2, of the coil board 11, the end portion of the coil board 11 is welded with the pin header 3, meanwhile, one side, deviating from the grid ruler 2, of the coil board 11 is adhered with the connecting board 4 through glue, the connecting board 4 is an epoxy board, one side, facing away from the coil board 11, of the connecting board 4 is adhered to the resolving board 12 through glue, and the end portion of the pin header 3 penetrates through the resolving board 12 and is fixed through welding.
Referring to fig. 2 and 4, the coil plate 11 is provided with a reading unit 5 for outputting an incremental position signal and an absolute position signal according to displacement of the grid ruler 2, respectively, the reading unit 5 includes an excitation coil 51, a first group of receiving coils 52, and a second group of receiving coils 53 arranged on the coil plate 11, and a ratio of receiving window periods of the first group of receiving coils 52 to the second group of receiving coils 53 satisfies 1: n, where N >1, preferably N is a positive integer, the first set of receiving coils 52 and the second set of receiving coils 53 are arranged in a stacked arrangement on the coil plate 11 and are arranged opposite to the single track 21, and the excitation coil 51 is arranged around the first set of receiving coils 52 and the second set of receiving coils 53.
Referring to fig. 2 and 4, N is 64 in the present embodiment, so that the reception window period of the second group of reception coils 53 is 64 periods and the single code track 21 is set to 10 periods, while the single period length L2 of the second group of reception coils 53 is equal to or smaller than the single period length L1 of the single code track 21, in the present embodiment, it is preferable that the single period length L2 of the second group of reception coils 53 is equal to the single period length L1 of the single code track 21, and secondly, the copper foil length of the single code track 21 always covers the width of the excitation coil 51 in order to secure the signal strength.
The resolving board 12 is provided with a signal processing circuit for resolving and subdividing the absolute position of the reading board 1 relative to the grid ruler 2 according to the absolute position signal and the incremental position signal. When the grating scale 2 and the reading plate 1 move relatively, the exciting coil 51 emits a high-frequency exciting signal, so that an alternating electromagnetic field is generated in space, the alternating electromagnetic field is influenced by a metal area of a single code channel 21 of the grating scale 2, the space electromagnetic field is changed, the alternating electromagnetic field is received by the first group receiving coil 52 and the second group receiving coil 53, so that the first group receiving coil 52 outputs an absolute position signal (monocycle signal) containing a sin signal and a cos signal, the second group receiving coil 53 outputs an incremental position signal (multicycle signal) containing a sin signal and a cos signal, the signal processing unit receives the absolute position signal and the incremental position signal to calculate, and the absolute position of low resolution and the incremental position of high resolution are respectively obtained by combining the two signals, so that the absolute position calculation of the grating scale 2 is realized, wherein the signal processing circuit is not described in the prior art.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (8)
1. The utility model provides a sharp inductance absolute value encoder, includes reading board (1) and relative parallel arrangement's bars chi (2), its characterized in that: the utility model discloses a gate ruler, including grid ruler (2), reading board (1), signal processing circuit, gate ruler (2) are provided with single code way (21) along its length direction, reading board (1) is provided with one side towards gate ruler (2) and is used for according to the displacement of gate ruler (2) and respectively output increment position signal and absolute position signal's reading unit (5), reading board (1) is provided with and is used for according to absolute position signal and increment position signal to calculate the subdivision and obtain the absolute position of reading board (1) relative gate ruler (2).
2. The linear inductance absolute value encoder of claim 1, wherein: the reading unit (5) comprises an excitation coil (51), a first group of receiving coils (52) and a second group of receiving coils (53) which are arranged on the reading plate (1), wherein the ratio of the number of receiving window periods of the first group of receiving coils (52) to the number of receiving window periods of the second group of receiving coils (53) is 1: n, wherein N >1, the first set of receiving coils (52) and the second set of receiving coils (53) are arranged on the reading plate (1) in a stacked mode and face the single code channel (21), the single cycle length of the second set of receiving coils (53) is equal to or smaller than the single cycle length of the Shan Ma channel (21), the exciting coils (51) are arranged around the first set of receiving coils (52) and the second set of receiving coils (53), and when the grating ruler (2) and the reading plate (1) relatively move, the first set of receiving coils (52) and the second set of receiving coils (53) respectively output absolute position signals and incremental position signals.
3. The linear inductance absolute value encoder of claim 1, wherein: the reading board (1) comprises a coil board (11) used for arranging the reading unit (5) and a resolving board (12) used for arranging a signal processing circuit, and the coil board (11) is fixedly connected with the resolving board (12).
4. The linear inductance absolute value encoder of claim 1, wherein: the single code channel (21) is formed by alternately forming metal areas and nonmetal areas at intervals.
5. The linear inductance absolute value encoder of claim 1, wherein: the single code channel (21) is made of metal, and the single code channel is formed by alternately forming grooves and protrusions at intervals.
6. A linear inductance absolute value encoder according to claim 3, wherein: a pin header (3) for electrical connection is fixedly connected between the coil board (11) and the resolving board (12).
7. The linear inductance absolute value encoder of claim 6, wherein: the coil plate (11) is fixedly connected with a connecting plate (4), and one side, deviating from the coil plate (11), of the connecting plate (4) is fixedly connected with a resolving plate (12).
8. The linear inductance absolute value encoder of claim 7, wherein: the connecting plate (4) is an epoxy plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321032321.0U CN220794262U (en) | 2023-04-27 | 2023-04-27 | Linear inductance absolute value encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321032321.0U CN220794262U (en) | 2023-04-27 | 2023-04-27 | Linear inductance absolute value encoder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220794262U true CN220794262U (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321032321.0U Active CN220794262U (en) | 2023-04-27 | 2023-04-27 | Linear inductance absolute value encoder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220794262U (en) |
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2023
- 2023-04-27 CN CN202321032321.0U patent/CN220794262U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Room 401, building 9, 36 Changsheng South Road, Jiaxing Economic and Technological Development Zone, Zhejiang 314000 Patentee after: Zhejiang Ruiying Sensing Technology Co.,Ltd. Country or region after: China Address before: Room 401, building 9, 36 Changsheng South Road, Jiaxing Economic and Technological Development Zone, Zhejiang 314000 Patentee before: Zhejiang Ruiying Sensing Technology Co.,Ltd. Country or region before: China |