CN203364856U - Absolute-type matrix coding disc - Google Patents
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- CN203364856U CN203364856U CN 201320499366 CN201320499366U CN203364856U CN 203364856 U CN203364856 U CN 203364856U CN 201320499366 CN201320499366 CN 201320499366 CN 201320499366 U CN201320499366 U CN 201320499366U CN 203364856 U CN203364856 U CN 203364856U
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Abstract
The utility model relates to a core element, which is for measuring physical quantities such as rotation angle, rotation speed, linear displacement and the like, of a sensing device in the automation field, and provides an absolute-type matrix coding disc. The absolute-type matrix coding disc comprises a coding disc and a slit disc, wherein the coding disc and the slit disc are parallel coaxially with a certain interval in between and are installed to a main shaft and a main body of an encoder respectively; the coding disc follows the main shaft of the encoder to rotate; and the slit disc is unmoved with respect to the coding disc. The coding disc is engraved with three loops of code tracks. The layouts of the transparent sections and opaque sections of each loop of code track are different. The slit disc is engraved with three slits, and the arrangement of each slit is different. When the coding disc rotates counterclockwise, the coding disc and the slit disc are in relative rotation. Each slit receives a high level signal when light penetrates and a low level signal when light is blocked. The coding disc can output ten codes; the slit disc is small in size; signals can be read with the utilization of a single head; the absolute-type matrix coding disc is simple in structure and convenient to debug; and the miniaturization and micromation development of the encoder is greatly improved.
Description
Technical field
The utility model belongs to the field of measuring technique of utilizing the output of transmission sensing member, relates to a kind of core parts of measuring the senser element of the physical quantitys such as the anglec of rotation, rotational speed, straight-line displacement for automatic field, is a kind of absolute type matrix coding disk.
Background technology
Optical electric axial angle encoder is the sensor of the physical quantitys such as a kind of measurement length commonly used, angle, speed, difference by coded system, substantially can be divided into increment type, absolute type and accurate absolute optical encoder three major types, wherein absolute photoelectric shaft encoder has the absolute position counting, precision is high, reliable and stable, be subject to the advantages such as external interference is little.Machine tool, the digital value that brake system of car needs sensor to produce is sometimes indicated mechanical location.As Fig. 1 is the concept map of code-wheel and some contacts, the position turned according to code-disc, contact produces 3 binary codings, has 8 such codings.In code-disc, dark zone is connected with the signal source of corresponding logical one; Bright zone does not connect, and contact is interpreted as logical zero by it.Use Gray code to bright, dark areas coding on code-wheel, make between its continuous code word and only have a numerical digit to change.The degree of accuracy that so can not manufacture because of device is unlimited, and makes contact forward boundary position to and error coded occurs.The core parts of optical electric axial angle encoder are code-wheels, comprise code-disc and the slit plate be complementary, and wherein code-disc is connected with the scrambler main shaft, when main shaft rotates, drive code-disc and synchronously rotate.A side at code-disc is equipped with light source (infraluminescence pipe), at opposite side, photoelectric receiving tube is housed, and between code-disc and photoelectric receiving tube, slit plate is housed.The light that light source sends is through the transparent zone section on code-disc, and the slit on slit plate, accepted by photoelectric receiving tube.When code-disc and slit generation relative angular displacement, photosignal is modulated into the strong and weak electric signal changed, through amplifying, and shaping, the sport technique segments such as decoding, output scale-of-two code.Along with the needs in the fields such as industrialization and high-tech development and military project, scientific research, more and more urgent to the requirement of optical electric axial angle encoder miniaturization.The requirement of optical electric axial angle encoder miniaturization, must make the radial dimension of code-disc and slit plate dwindle or to adopting special method for designing on the code channel design of code-disc, but, after the size of code-disc and slit is dwindled, affect the effective width in code channel zone, that is to say, if guarantee same resolution, code channel quantity is constant, can only reduce the width of code channel, like this to size reduce the contribution very little; If guarantee that the code channel width is constant, can only be to reduce code channel quantity, can cause like this encoder resolution to reduce.The matrix coder dish that slit plate shown in code-disc shown in Fig. 2 and Fig. 3 is complementary and forms, can only export 8 bit codes, and the angle resolution of scrambler can only reach 1.40625 °.Therefore, dwindle and don't reduce the output figure place of scrambler at the radial dimension of code-disc, will on the code channel layout of code-disc, take new method for designing.
Summary of the invention
The utility model overcome the defect that disclosed technology exists so far, improve the angle measurement accuracy of scrambler, the physical dimension of dwindling scrambler, solve the needs of absolute type encoder miniaturization, enlarge application and the usable range of scrambler, proposed a kind of novel absolute type matrix coding disk.
The purpose of this utility model is achieved in that a kind of absolute type matrix coding disk, code-disc and the slit plate by coaxial space, arranged form, radially delineate code channel is arranged on described code-disc, be provided with accordingly slit on described slit plate, on described code-disc, code channel number is 3, the first lap code channel is provided with different subregions, be respectively 0 °～90 °, 90 °～180 °, 180 °～270 °, 270 °～360 ° four sector regions: in the zone of 0 °～90 °, be all non-transparent zone section; In 90 °～180 ° zones, it is all the transparent zone section; In the zone of 180 °～270 °, two transparent zone sections and two opaque zone sections are not arranged, both are wide and distribute alternately, and the width of each transparent zone section and opaque zone section is 22.5 °; In 270 °～360 ° zones, the transparent zone section that two width are 22.5 ° is arranged, the width of transparent zone section is half of a unique non-transparent zone section; The second circle code channel is correcting code, be whole circumference equal intervals be provided with 16 transparent zone sections and 16 opaque zone sections, their width is 11.25 when distributing alternately, one of them transparent zone section, with 0 ° of line symmetry, respectively have 5.625 ° up and down; Three circle channel is divided into four sector regions, and the transparent zone section of each sector region is identical with the set-up mode of opaque zone section; Each is wide is in the sector region of 90 °, the hop count of transparent zone section is by 2,4,8, it is in the subregion of 22.5 ° that 16 Geometric Sequence echelon is distributed in each wide, distributing alternately of transparent zone section in same subregion and opaque zone section, the opaque zone section that every two transparent zones are intersegmental and transparent zone section wide, but also respectively there is a half-breadth opaque zone section in the outside of two transparent zone sections of initial and end, be that its width is half of transparent zone section, to realize transparent zone section and opaque zone section overall width separately, be equal to 11.25 °.Be parallel to each other between the two and keep certain gap, be arranged on respectively on the main shaft and fixing main body of rotation of scrambler, code-disc rotates with the scrambler main shaft, slit plate maintains static moving with respect to the scrambler main shaft, between code-disc and slit plate, relatively rotate, output code is recording the angular displacement position that the scrambler main shaft rotates.
As preferably, a kind of absolute type matrix coding disk, in the radial position corresponding with described code-disc of described slit plate, the large strip slit such as be provided with in the sector region that is 90 ° at beam overall, be specially: A: first is provided with eight slits, with a1, a2, a3, a4, a5, a6, a7, a8, mean, a1 at 357.1875 °, a2 at 2.8125 °, a3 at 19.6875 °, a4 at 25.3125 °, a5 at 42.1875 °, a6 at 47.8125 °, a7 at 64.6875 °, a8 at 70.3125 °; B: second is provided with two slits, with b1, b2, mean, b1 at 5.625 °, b2 at 11.25 °; C: the 3rd road is provided with four slits, with c1, c2, c3, c4, mean, c1 at 0 °, c2 at 22.5 °, c3 at 45 °, c4 at 67.5 °.The first lap code channel of code-disc and the first slit of slit plate are complementary, the second circle code channel of code-disc and the second slit of slit plate are complementary, the three circle channel of code-disc and slit plate tri-road slits are complementary, when code-disc clockwise rotates, first slit, second slit, tri-road slits, on running into code-disc during the transparent zone section of corresponding code channel, and the slit that sees through slit plate just presents high level state.While running into the opaque zone section, present low level state, there is no signal output.Such level signal combines, and has just represented the motion feature of measurand.
As preferably, a kind of absolute type matrix coding disk, described slit plate is fan-shaped, in the scope that beam overall is 90 °, the wide 50um of every slit, and radially isometric with the transparent zone section.This slit plate size is less, can effectively save material, and the slit setting is compact too, coordinates exportable 10 codings of code-disc.
Therefore, the utility model compared with the prior art, is both the coupling of three circle channel and three road slits, prior art can only be exported eight codings, angle resolution is 1.40625 °, and the coding of ten positions is distinguished in the utility model output, and angle resolution is 0.3515625 °.Prior art slit window quartern on 360 ° of circumference distributes, the utility model slit is distributed in the fan-shaped range of 90 °, slit sizes is 1/4 of prior art slit sizes, simple in structure, debugging is convenient, with low cost, promote scrambler to miniaturization, microminiaturized development, enlarged the range of application of scrambler.
The accompanying drawing explanation
Fig. 1 is the concept map of code-disc and some contacts;
The code-disc of Fig. 2 prior art;
Fig. 3 is the slit plate with the supporting prior art of Fig. 1;
Fig. 4 is the structural representation of the code-disc of the utility model embodiment;
The structural representation of the slit plate of Fig. 5 the utility model embodiment
Fig. 6 is the high level signal indicator gauge of the first lap of the utility model embodiment, table 1;
Fig. 7 is the cycle binary code decoding table of Fig. 6, table 2;
Fig. 8 is the cycle binary code decoding table of the 3rd circle of the utility model embodiment, table 3;
Fig. 9 is the fundamental diagram of the utility model embodiment;
Figure 10 is code channel shop drawing of the present utility model.
In figure: 1, code-disc, 1a, transparent zone section, 1b, opaque zone section, 1b ', half-breadth opaque zone section, 2, slit plate, 2a, slit, 3, light source, 4, read head, 5 signal processing apparatus, 6, main shaft.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment 1: the utility model discloses absolute type matrix coding disk.The material that is specially code-disc 1 and slit 2 can adopt K9 optical glass, adopts chrome-faced, photoetching, the method that copies are made.Code-disc 1 and the slit plate 2 with rotary main shaft 6 gaps, arranged, physical dimension is φ 30 donuts, radially delineate code channel is arranged on described code-disc 1, be provided with accordingly slit 2a on described slit plate 2, on described code-disc 1, code channel number is 3, the first lap code channel is provided with different subregions, is respectively 0 °～90 °, 90 °～180 °, 180 °～270 °, 270 °～360 ° four sector regions: in the zone of 0 °～90 °, be all non-transparent zone section 1b; In 90 °～180 ° zones, it is all the transparent zone section; In the zone of 180 °～270 °, two transparent zone section 1a and two opaque zone section 1b are arranged, both width equate but distribute alternately, the width of each transparent zone section 1a and opaque zone section 1b is 22.5 °; In 270 °～360 ° zones, two transparent zone section 1a are arranged, the width of transparent zone section 1a is half of non-transparent zone section 1b, width is 22.5 °; The second circle code channel is correcting code, be whole circumference equal intervals be provided with 16 transparent zone section 1a and 16 opaque zone section 1b, their width is 11.25 ° and distributes alternately that one of them transparent zone section 1a, with 0 ° of line symmetry, respectively has 5.625 ° up and down; Three circle channel is divided into four sector regions, and the transparent zone section 1a of each sector region is identical with the set-up mode of opaque zone section 1b; Wide at each is in the sector region of 90 °, the hop count of transparent zone section is by 2,4,8, it is in the subregion of 22.5 ° that 16 Geometric Sequence echelon is distributed in each wide, transparent zone section 1a in same subregion and opaque zone section 1b distribute alternately, opaque zone section 1b between every two transparent zone section 1a and transparent zone section 1a's is wide, but also respectively there is a half-breadth opaque zone section 1b ' in the outside of two transparent zone sections of initial and end, be that its width is half of transparent zone section 1a, to realize transparent zone section 1a and the opaque zone section 1b width that always accounts for separately, be equal to 11.25 °.In the radial position corresponding with described code-disc 1 of described slit plate 2, the large strip slit 2a such as be provided with in the sector region that is 90 ° at beam overall, be specially: A: first is provided with eight slit 2a, with a1, a2, a3, a4, a5, a6, a7, a8, mean, a1 at 357.1875 °, a2 at 2.8125 °, a3 at 19.6875 °, a4 at 25.3125 °, a5 at 42.1875 °, a6 at 47.8125 °, a7 at 64.6875 °, a8 at 70.3125 °; B: second is provided with two slit 2a, with b1, b2, mean, b1 at 5.625 °, b2 at 11.25 °; C: the 3rd road is provided with four slit 2a, with c1, c2, c3, c4, mean, c1 at 0 °, c2 at 22.5 °, c3 at 45 °, c4 at 67.5 °, differ successively 22.5 °.Code-disc 1 and slit plate 2 are parallel to each other between the two and keep certain gap, be arranged on respectively on the main shaft 6 and fixing main body of rotation of scrambler, code-disc 1 rotates with scrambler main shaft 6, slit plate 2 maintains static moving with respect to the scrambler main shaft, between code-disc 1 and slit plate 2, relatively rotate, output code is recording the angular displacement position that the scrambler main shaft rotates.The first lap code channel of code-disc 1 and the first slit of slit plate are complementary, the second circle code channel of code-disc 1 and the second slit of slit plate are complementary, the three circle channel of code-disc 1 and slit plate tri-road slits are complementary, when code-disc 1 clockwise rotates, see through first slit 2a, second slit 2a, tri-road slit 2a, during the transparent zone section 1a of light source 3 corresponding code channel on running into code-disc 1, present high level state, have signal output.While running into opaque zone section 1b, present low level state, do not have signal to export through signal processing apparatus 5 through read head 4.The photosignal that first slit a1 a2 a3 a4 a5 a6 a7 a8 receives is as shown in the table 1 of Fig. 6: AX represents the transparent zone high level signal, and space represents the opaque zone low level signal, and the relational expression that signal is processed is:
In the table 1 of Fig. 6, with A1 place behavior example, if representative is worked as code-disc at 90 °～112.5 °, 112.5 °～135 °, 135 °～157.5 °, 157.5 °～180 °, 202.5 °～225 °, 247.5 °～270 °, 270 °～292.5 °, 337.5 °～360 ° positions, obtain high level AX simultaneously, this position be encoded to A1, obtain low and high level on correspondence position and mean with 1 and 0, to be expressed as binary number be that 0000111101011001 follow-up A2 differs 22.5 ° successively to A4 to the A1 corresponding row.A1, A2, A3, A4 are Gray codes, but are not traditional cycle codes, by decoding, are processed into standard binary code Z1, Z2, Z3, Z4, and decoding table is shown in shown in the table 2 of Fig. 7.The D1 column indicates the location of reading of 16 22.5 ° of code-disc, the sequence number of the corresponding row of D1 in corresponding table 1.0 finger of first row is the position of 0 °～22.5 ° of correspondences on code-disc.The A1 row are exactly that binary number 0000111101011001 is listed as to arrangement, the decimal number 0 of the horizontal binary number 0000 that D2 row corresponding A 1 to A4 is D1 sequence number 0.Under D3 row to continuous decimal number 0 to 15, Z1 is listed as to the corresponding D3 of arbitrary behavior of Z4 row the binary number that descending decimal number changes into, and the value that is listed as the 3rd row as D3 is 2, and changing into binary number is 0010, like this, the binary number under the Z3 row is 0011001100110011.
Second slit b
1and b
2exported separately single A5 code and A6 code, need not process and become the 5th traditional bit code A5 and the 6th bit code A6 through signal processing apparatus 5.The light signal that Cong tri-road slit c1, c2, c3, c4 receive from light source 3, as shown in the table 3 of Fig. 8, the relational expression that is processed into tradition cycle binary code is:
In table, c1 is capable intersects corresponding A7 with first row, is illustrated in 0 °～22.5 °, and 90 °～112.5 °, 180 °～
202.5 °, 270 °～292.5 ° positions obtain high level, when other angles are low level, and read the code A7, corresponding logical relationship formula
.
Embodiment 2: a kind of absolute type matrix coding disk comprises circular code-disc 1 and the fan-shaped slit plate 2 of 90 degree, all adopts K9 optical glass, and both arrangements are with embodiment 1, but physical dimension is φ 25.The delineation mode of slit plate 2 Shang tri-road slit 2a is: A: first is provided with eight slit 2a, with a1, a2, a3, a4, a5, a6, a7, a8, mean, a1 at-2.8125 °, a2 at 2.8125 °, a3 at 19.6875 °, a4 at 25.3125 °, a5 at 42.1875 °, a6 at 47.8125 °, a7 at 64.6875 °, a8 at 70.3125 °; B: second is provided with two slit 2a, with b1, b2, mean, b1 at 5.625 °, b2 at 11.25 °; C: the 3rd road is provided with four slit 2a, with c1, c2, c3, c4, mean, c1 at 0 °, c2 at 22.5 °, c3 at 45 °, c4 at 67.5 °.When clockwise rotating, can realize equally 10 different Gray codes, the absolute angle value turned over to distinguish code-disc 1.See in detail the code channel shop drawing of Figure 10 between the coding current potential, wherein the slice frame represents and can illumination can and see through the slit 2a fan-shaped slit plate 2 from code-disc 1, obtains high level 1.Its code channel working method is shown in Figure 10.
Embodiment 3:: a kind of absolute type matrix coding disk, need only amplify the radial dimension of the fan-shaped slit plate 2 of code-disc 1 and 90 degree, and need not change the delineation layout type, adopt different decoding tables, four matrix code disks of precedent, also become eight matrix code disks, its exportable 14 different Gray codes, resolution to 360 °/2
14=0.02 °.
In a word, the utility model compared with the prior art, is both the coupling of three circle channel and three circle slits, and material also can adopt metal.Prior art can only be exported eight codings, and angle resolution is 1.40625 °, the utility model outputting ten position coding, and angle resolution is 0.3515625 °, is the former 2
2=4 times.Prior art slit window quartern on 360 ° of circumference distributes, slit window of the present invention is distributed in 90 ° of scopes, slit sizes is 1/4 of prior art slit sizes, and adopt scrambler of the present utility model, and only need fixing single light source, simple in structure, debugging is convenient, with low cost, promote scrambler to miniaturization, microminiaturized development, enlarged the range of application of scrambler.
Claims (3)
1. an absolute type matrix coding disk, the code-disc (1) of being arranged by coaxial space and slit plate (2) form, radially delineate code channel is arranged on described code-disc (1), be provided with accordingly slit (2a) on described slit plate (2), it is characterized in that: the upper code channel number of described code-disc (1) is 3
A: the first lap code channel is provided with different subregions, be respectively 0 °～90 °, 90 °～180 °, 180 °～270 °,
270 °～360 ° four sector regions: in the zone of 0 °～90 °, be all opaque zone section (1b); In 90 °～180 ° zones, it is all transparent zone section (1a); In the zone of 180 °～270 °, two transparent zone sections (1a) and two opaque zone sections (1b) are arranged, both are wide and distribute alternately, and the width of each transparent zone section (1a) and opaque zone section (1b) is 22.5 °; In 270 °～360 ° zones, it is 22.5 ° of transparent zone sections (1a) that two width are arranged, and is half of a unique opaque zone section width;
B: the second circle code channel is correcting code, be whole circumference equal intervals be provided with 16 transparent zone sections (1a) and 16 opaque zone sections (1b), their width is 11.25 ° but distributes alternately, one of them transparent zone section (1a), with 0 ° of line symmetry, respectively there are up and down 5.625 °;
C: three circle channel is divided into four sector regions, and the transparent zone section of each sector region is identical with the set-up mode of opaque zone section, each is wide is in the sector region of 90 °, the hop count of transparent zone section (1a) is by 2, 4, 8, it is in the subregion of 22.5 ° that 16 Geometric Sequence echelon is distributed in each wide, transparent zone section (1a) in same subregion and opaque zone section (1b) distribute alternately, opaque zone section (1b) between every two transparent zone sections (1a) is wide with transparent zone section (1a), but first, also respectively there is a half-breadth opaque zone section (1b ') in the outside of two transparent zone sections of tail (1a), be that its width is half of transparent zone section (1a), to realize that transparent zone section (1a) and opaque zone section (1b) overall width separately are equal to 11.25 °.
2. absolute type matrix coding disk according to claim 1 is characterized in that: in described slit plate (2) radial position corresponding with described code-disc (1), the large strip slit (2a) such as be provided with in the sector region that is 90 ° at beam overall, be specially:
A: first is provided with eight slits (2a), with a1, a2, a3, a4, a5, a6, a7, a8, mean, a1 at 357.1875 °, a2 at 2.8125 °, a3 at 19.6875 °, a4 at 25.3125 °, a5 at 42.1875 °, a6 at 47.8125 °, a7 at 64.6875 °, a8 at 70.3125 °;
B: second is provided with two slits (2a), with b1, b2, mean, b1 at 5.625 °, b2 at 11.25 °;
C: the 3rd road is provided with four slits (2a), with c1, c2, c3, c4, means, c1 exists at 22.5 °, c3 at 0 °, c2
45 °, c4 are at 67.5 °.
3. absolute type matrix coding disk according to claim 2 is characterized in that: described slit plate (2) is for fan-shaped, and beam overall is 90 °, the wide 50um of every slit (2a), and radially isometric with transparent zone section (1a).
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| CN 201320499366 CN203364856U (en) | 2013-08-16 | 2013-08-16 | Absolute-type matrix coding disc |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106569434A (en) * | 2016-08-31 | 2017-04-19 | 宝鸡中发石油机械有限责任公司 | Encoder type control handle |
| CN113518897A (en) * | 2019-03-15 | 2021-10-19 | 谐波传动系统有限公司 | Optical rotary encoder, servo motor, and actuator |
| CN115355809A (en) * | 2022-10-20 | 2022-11-18 | 宿迁天海数字测控技术有限公司 | Electromagnetic induction displacement sensor device for measuring instrument |
-
2013
- 2013-08-16 CN CN 201320499366 patent/CN203364856U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106569434A (en) * | 2016-08-31 | 2017-04-19 | 宝鸡中发石油机械有限责任公司 | Encoder type control handle |
| CN113518897A (en) * | 2019-03-15 | 2021-10-19 | 谐波传动系统有限公司 | Optical rotary encoder, servo motor, and actuator |
| CN113518897B (en) * | 2019-03-15 | 2023-08-22 | 谐波传动系统有限公司 | Optical rotary encoder, servo motor, and actuator |
| CN115355809A (en) * | 2022-10-20 | 2022-11-18 | 宿迁天海数字测控技术有限公司 | Electromagnetic induction displacement sensor device for measuring instrument |
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