CN109000688A - A kind of angular encoder - Google Patents
A kind of angular encoder Download PDFInfo
- Publication number
- CN109000688A CN109000688A CN201810876989.0A CN201810876989A CN109000688A CN 109000688 A CN109000688 A CN 109000688A CN 201810876989 A CN201810876989 A CN 201810876989A CN 109000688 A CN109000688 A CN 109000688A
- Authority
- CN
- China
- Prior art keywords
- pcb board
- piezoelectric ceramics
- shell
- outer cylinder
- inner tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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- 239000000919 ceramic Substances 0.000 claims abstract description 36
- 238000012545 processing Methods 0.000 claims abstract description 8
- 238000002955 isolation Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims 1
- 230000001568 sexual effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000306 component Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001595 contractor effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
Abstract
A kind of angular encoder, including main shaft, shell, pcb board bracket, pcb board, processing chip, encoder code disc, piezoelectric ceramics, control assembly and temperature sensor；Main shaft includes the outer cylinder and inner tube of coaxial arrangement, one end of inner tube is connect with the inner bottom wall of the outer cylinder, one end grafting of said inner tube is in the housing, one end of shell is plugged in the gap between said inner tube and the outer cylinder, mounting groove is provided on one end far from the outer cylinder of inner tube, one end of the piezoelectric ceramics is installed in the mounting groove, and the other end of the piezoelectric ceramics is connect with the encoder code disc；The pcb board bracket is set on the inner wall of one end far from the outer cylinder of the shell, the pcb board is set on the pcb board bracket, the processing chip be set to the pcb board towards the one side of the encoder code disc and opposite with the encoder code disc, temperature sensor is set on main shaft.
Description
Technical field
The present invention relates to field of precision measurement, more particularly to a kind of angular encoder.
Background technique
Angular encoder is a kind of sensor for high-accuracy rotation angle detection, and high-accuracy angular encoder is extensive
For the occasions such as servo motor feedback, high-accuracy turntable, main shaft orientation.Angular encoder core component include encoder code disc and
Receiving sensor.Wherein, encoder code disc and receiving sensor are respectively arranged on encoder main shaft and pcb board bracket.It receives
More's item that sensor is formed using the receiving sensor of reflection or transmitted light source after encoder code disc on pcb board
Line generates sine wave signal, and is output on system processor, the location information for feedback angle encoder.
On being normally applied, due to temperature change, it will lead to encoder main shaft and pcb board bracket expand deformation.This
When be bonded in and cause the relative distance of encoder code disc on encoder main shaft and installation and the pcb board on pcb board bracket will
It shifts, and distance between the two is to determine a key factor of code device signal quality.The letter of the sine wave of generation
Number quality will affect the position precision of feedback, and therefore, the position precision that temperature change will lead to encoder feedback changes, because
This, the prior art is defective, needs to improve.
Summary of the invention
The embodiment of the present invention provides a kind of angular encoder, can be with the accuracy in detection of angular encoder.
The embodiment of the present invention provides a kind of angular encoder, which is characterized in that including main shaft, shell, pcb board bracket, PCB
Plate, processing chip, encoder code disc, piezoelectric ceramics, control assembly and temperature sensor；
The main shaft includes that the outer cylinder of coaxial arrangement and inner tube, one end of said inner tube are connect with the inner bottom wall of the outer cylinder,
One end grafting of said inner tube in the housing, between one end of the shell is plugged between said inner tube and the outer cylinder
In gap, mounting groove is provided on one end far from the outer cylinder of said inner tube, one end of the piezoelectric ceramics is installed on described
In mounting groove, the other end of the piezoelectric ceramics is connect with the encoder code disc；The pcb board bracket is set to the shell
One end far from the outer cylinder inner wall on, the pcb board is set on the pcb board bracket, and the processing chip is arranged
In the pcb board towards the one side of the encoder code disc and opposite with the encoder code disc, the temperature sensor set
It is placed on the main shaft；The control assembly is electrically connected with the piezoelectric ceramics and the temperature sensor, the control
Component processed is used to control the voltage at the piezoelectric ceramics both ends according to the temperature that the temperature sensor detects, to control institute
State the length along the main shaft axial direction of piezoelectric ceramics；It further include elastomeric isolation set, the elastomeric isolation set is socketed in described
Inner tube is inserted on one end of the shell, and the mutual elasticity of inner sidewall of the lateral wall and the shell of the elastomeric isolation set is supported；
The quantity of the mounting groove is two, and the piezoelectric ceramics is two and is in the form of a column respectively；The quantity of the mounting groove is one,
The quantity of the piezoelectric ceramics is 1, and the mounting groove is annular in shape, and the piezoelectric ceramics is annular in shape.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the angular encoder in the embodiment of the present invention.
Fig. 2 is the structural schematic diagram of the main shaft of the angular encoder in the embodiment of the present invention.
Fig. 3 is the structural schematic diagram of the shell of the angular encoder in the embodiment of the present invention.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of
The description present invention and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with spy
Fixed orientation construction and operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " are only used for
Purpose is described, relative importance is not understood to indicate or imply or implicitly indicates the quantity of indicated technical characteristic.
" first " is defined as a result, the feature of " second " can explicitly or implicitly include one or more feature.?
In description of the invention, the meaning of " plurality " is two or more, unless otherwise specifically defined.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected or can mutually communicate；It can be directly connected, it can also be by between intermediary
It connects connected, can be the connection inside two elements or the interaction relationship of two elements.For the ordinary skill of this field
For personnel, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of
First feature horizontal height is less than second feature.
Following disclosure provides many different embodiments or example is used to realize different structure of the invention.In order to
Simplify disclosure of the invention, hereinafter the component of specific examples and setting are described.Certainly, they are merely examples, and
And it is not intended to limit the present invention.In addition, the present invention can in different examples repeat reference numerals and/or reference letter,
This repetition is for purposes of simplicity and clarity, itself not indicate between discussed various embodiments and/or setting
Relationship.In addition, the present invention provides various specific techniques and material example, but those of ordinary skill in the art can be with
Recognize the application of other techniques and/or the use of other materials.
Fig. 1 is please referred to, the embodiment of the present invention provides a kind of angular encoder, including shell 10, main shaft 20, pcb board bracket
30, encoder code disc 40, piezoelectric ceramics 50, control assembly, temperature sensor, processing chip 60, pcb board 70, elastomeric isolation set
80。
Wherein, referring to Fig. 2, which includes the outer cylinder 21 and inner tube 22 of coaxial arrangement, and inner tube 22 is in circle
Tubulose, the outer cylinder 21 are cylindrical.One end of inner tube 22 is connect with the inner bottom wall of outer cylinder 21, and one end of inner tube 22 is plugged on shell
In 10, one end of shell 10 is plugged in the gap between inner tube 22 and outer cylinder 21.Elastomeric isolation set 80 is socketed in said inner tube
On one end of the 22 insertion shells 10, the inner sidewall of 80 lateral walls and the shell 10 of the elastomeric isolation set is mutually elastic
It supports.
Wherein, mounting groove, one end of the piezoelectric ceramics 50 are provided on one end far from the outer cylinder 21 of inner tube 22
It is installed in the mounting groove, the other end of the piezoelectric ceramics 50 is connect with the encoder code disc 40；The pcb board bracket
30 are set on the inner wall of one end far from the outer cylinder of the shell 10, and the pcb board 70 is set to the pcb board bracket
On 30, processing chip 60 be set to the pcb board 70 towards the encoder code disc 40 one side and with encoder code disc 40
Relatively, the temperature sensor is set on main shaft 20.
Control assembly is electrically connected with piezoelectric ceramics 50 and temperature sensor, and control assembly is used for according to the temperature
The temperature that sensor detects controls the voltage at 50 both ends of piezoelectric ceramics, thus control the piezoelectric ceramics 50 along institute
State the axial length of main shaft 20.
Wherein, which sets according to the coefficient of expansion of the main shaft 20 and pcb board bracket 30 being affected by temperature
A fixed function controls according to the function when receiving the temperature of temperature sensor detection and is supplied to piezoelectric ceramics 50
Voltage swing, to control the length of piezoelectric ceramics 50.When temperature is higher, and main shaft 20 and pcb board bracket 30 expand, piezoelectricity
The length of ceramics 50 is smaller.When temperature is lower, and main shaft 20 and pcb board bracket 30 are shunk, the length of piezoelectric ceramics 50 is larger.
So that the testing result of angular encoder is not acted upon by temperature changes, so as to improve the accuracy of detection.
The main shaft 20, pcb board bracket 30 are made of identical material, so that its thermal expansion and cold contraction effect having the same.
Specifically, which is in ladder tubulose.Pcb board bracket 30 is connected through a screw thread with the shell 10.Or
Person, pcb board bracket 30 and the shell 10 interference fit connect.
Pcb board bracket 30 includes the first connecting tube 31 and the second connecting tube 32 for being connected with each other and being coaxially disposed, described
The radius of first connecting tube 31 is greater than the radius of second connecting tube 32, and first connecting tube 31 connects with the shell 10
It connects, is spaced pre-determined distance between second connecting tube 32 and the inner sidewall of the shell 10；The pcb board 70 is installed on described
On one end far from first connecting tube 31 of second connecting tube 32.
Referring to Fig. 3, shell 10 includes the third connecting tube 11 and the 4th connection of interconnection and coaxial arrangement
Pipe 22, one end of the third connecting tube 11 of shell 10 are plugged in the gap between inner tube 22 and outer cylinder 21.
In some embodiments, angular encoder further includes first electrode layer and the second electrode lay.First electrode layer is set
It is placed on the bottom wall of the mounting groove of inner tube 22, the second electrode lay is set on the encoder code disc 40, the control group
Part is electrically connected with the first electrode layer and the second electrode lay respectively, the first electrode layer and the second electrode lay respectively with
The both ends of the piezoelectric ceramics 50 are electrically connected.First electrode layer and the second electrode lay are silver-coated electrode layer.
In some embodiments, control assembly includes control chip and driving circuit, the control chip and driving
Circuit is all set on the pcb board, and the control chip is electrically connected with the driving circuit, the driving circuit and described the
One electrode layer and the second electrode lay are electrically connected.
In some embodiments, the quantity of mounting groove is two, and the piezoelectric ceramics 50 is two and is in the form of a column respectively.
In some embodiments, the quantity of mounting groove is one, and the quantity of the piezoelectric ceramics 50 is 1, the installation
Slot is annular in shape, and the piezoelectric ceramics 50 is annular in shape.
In some embodiments, it is provided with spacer pin on the end face of one end towards the pcb board 70 of the pcb board bracket,
Be provided with limit hole on the corresponding pcb board, the spacer pin being axially slidably plugged in limit hole along limit hole,
To realize the limit to pcb board.
In the description of this specification, reference term " embodiment ", " certain embodiments ", " schematically implementation
What the description of mode ", " example ", " specific example " or " some examples " etc. meant to describe in conjunction with the embodiment or example
Particular features, structures, materials, or characteristics are contained at least one embodiment or example of the invention.In this specification
In, schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific spy of description
Sign, structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.
In conclusion although the present invention has been disclosed above in the preferred embodiment, but above preferred embodiment is not to limit
The system present invention, those skilled in the art can make various changes and profit without departing from the spirit and scope of the present invention
Decorations, therefore protection scope of the present invention subjects to the scope of the claims.
Claims (7)
1. a kind of angular encoder, it is characterised in that including main shaft, shell, pcb board bracket, pcb board, processing chip, encoder
Code-disc, piezoelectric ceramics, control assembly and temperature sensor；The main shaft includes the outer cylinder and inner tube of coaxial arrangement, described
One end of inner tube is connect with the inner bottom wall of the outer cylinder, one end grafting of said inner tube in the housing, the one of the shell
End is plugged in the gap between said inner tube and the outer cylinder, is provided with peace on one end far from the outer cylinder of said inner tube
Tankage, one end of the piezoelectric ceramics are installed in the mounting groove, the other end of the piezoelectric ceramics and the encoder code
Disk connection；The pcb board bracket is set on the inner wall of one end far from the outer cylinder of the shell, the pcb board setting
In on the pcb board bracket, the processing chip be set to the pcb board towards the encoder code disc one side and with institute
It is opposite to state encoder code disc, the temperature sensor is set on the main shaft；The control assembly and the piezoelectric ceramics with
And the temperature sensor is electrically connected, the temperature that the control assembly is used to be detected according to the temperature sensor controls
The voltage at the piezoelectric ceramics both ends, to control the length along the main shaft axial direction of the piezoelectric ceramics；It further include bullet
Sexual isolation set, the elastomeric isolation set are socketed in said inner tube and are inserted on one end of the shell, outside the elastomeric isolation set
The mutual elasticity of inner sidewall of side wall and the shell is supported；The quantity of the mounting groove be two, the piezoelectric ceramics be two and
It is in the form of a column respectively；The quantity of the piezoelectric ceramics is 1, and the mounting groove is annular in shape, and the piezoelectric ceramics is annular in shape.
2. angular encoder according to claim 1, it is characterised in that the shell is in ladder tubulose.
3. angular encoder according to claim 1, it is characterised in that the pcb board bracket and the shell pass through screw thread
Connection.
4. angular encoder according to claim 1, it is characterised in that the pcb board bracket and the shell are interference fitted
Connection.
5. angular encoder according to claim 1, it is characterised in that the pcb board bracket includes being connected with each other and coaxial
The first connecting tube and the second connecting tube being arranged, the radius of first connecting tube are greater than the radius of second connecting tube,
First connecting tube and the cage connection, be spaced between second connecting tube and the inner sidewall of the shell it is default away from
From；The pcb board is installed on one end far from first connecting tube of second connecting tube.
6. angular encoder according to claim 1, it is characterised in that it further include first electrode layer and the second electrode lay,
The first electrode layer is set on the bottom wall of the mounting groove, and the second electrode lay is set on the encoder code disc,
The control assembly is electrically connected with the first electrode layer and the second electrode lay respectively, the first electrode layer and the second electricity
Pole layer is electrically connected with the both ends of the piezoelectric ceramics respectively.
7. according to claim 1 or angular encoder as claimed in claim 6, it is characterised in that the control assembly includes control
Coremaking piece and driving circuit, the control chip and driving circuit are all set on the pcb board, the control chip with
The driving circuit electrical connection, the driving circuit are electrically connected with the first electrode layer and the second electrode lay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810876989.0A CN109000688A (en) | 2018-08-03 | 2018-08-03 | A kind of angular encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810876989.0A CN109000688A (en) | 2018-08-03 | 2018-08-03 | A kind of angular encoder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109000688A true CN109000688A (en) | 2018-12-14 |
Family
ID=64595138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810876989.0A Withdrawn CN109000688A (en) | 2018-08-03 | 2018-08-03 | A kind of angular encoder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109000688A (en) |
-
2018
- 2018-08-03 CN CN201810876989.0A patent/CN109000688A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181214 |