CN207487708U - A kind of magnetic encoder calibrating installation - Google Patents
A kind of magnetic encoder calibrating installation Download PDFInfo
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- CN207487708U CN207487708U CN201721457823.2U CN201721457823U CN207487708U CN 207487708 U CN207487708 U CN 207487708U CN 201721457823 U CN201721457823 U CN 201721457823U CN 207487708 U CN207487708 U CN 207487708U
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Abstract
The utility model is related to a kind of magnetic encoder calibrating installations, its direct construction goes out the high-precision mapping relations between the exported analog voltage signal of magnetic encoder signal generation point and absolute type angle value, the influences of the factors to measurement effect such as the non-linear of magnetic field of permanent magnet, machining accuracy and rigging error are eliminated, so as to which encoder accuracy of detection and resolution ratio be greatly improved.The utility model is respectively provided with the reason of corresponding warning signal exports, judges to go wrong according to abnormal conditions so as to staff for each abnormal conditions occurred in the process, in time investigation.In view of above reason, the utility model can be widely applied to encoder techniques field.
Description
Technical field
The utility model is related to encoder techniques field, especially with regard to a kind of magnetic encoder calibrating installation.
Background technology
Calibration, i.e., treat calibration instrument using the measuring instrument of higher precision or resolution ratio and measure, with to be calibrated
The output error of instrument compensates, so as to fulfill the error for eliminating instrument to be calibrated to improve the purpose of measurement accuracy.Essence
Upper any measuring instrument of analysis is required for being calibrated, and only the mode of calibration process performance is different, in photoelectric encoder
The scoring process of grating disc is equivalent to a calibration process, and groove, the precision of groove are carried out by high accuracy circular dividing machine
Measurement accuracy is directly affected with steepness.Collimation technique is surveyed in photogrammetry, industrial robot, series-parallel machine tool and transient temperature
The fields such as amount are applied and develop.
Traditional single pair pole magnetic encoder, mapping relations between hall signal and angle based on arc tangent algorithm construction
Accuracy is necessarily influenced by factors such as the non-linear and rigging errors of magnetic field signal.And the original output letter of magnetic encoder
Number and measurement error be difficult to be described with an exact mathematical model, even have such a mathematical model, but examine
Consider the difference of the material elements such as every encoder assembling, the signal curve and error function of each magnetic encoder also not to the utmost one
Sample, therefore, it is difficult to the measurement error of multiple magnetic encoders is compensated with same error model.In addition, though calibration makes
It obtains in the case where magnetic encoder signal generation point immobilizes, substantially reduces non-linear, the processing essence of magnetic field of permanent magnet
The influence of the factors to encoder accuracy such as degree and rigging error, but the Automatic manual transmission error of calibration system in itself still can influence
Encoder itself precision.
Current be corrected for magnetic encoder has the following problems：
1) calibration operation is more complicated, is manually operated in usual PC machine, uploads or downloading data is also manual operation, work
It is less efficient；
2) occur being difficult to find reason during calibration error, could usually be analyzed in PC machine Excel list datas, to behaviour
It is higher to make personnel requirement；
3) photoelectric encoder can not shift to an earlier date software processing with the increase and decrease of magnetic encoder data；
4) gathered data period and the period consistency of actual use, i.e. period consistency, that is, calibration data acquisition
When each Sampling time periods and consistency of each Sampling time periods in actual use；
5) calibration system hardware design defect leads to whole upward stability, poor reliability, is easily damaged.
Invention content
The technical problems to be solved in the utility model is：In order to solve encoder measurement accuracy in the prior art it is low and differentiate
The problem of rate is low, the utility model provide a kind of magnetic encoder calibrating installation to solve the above problems.
In order to achieve the above objectives, the utility model mainly provides following technical solution：A kind of magnetic encoder calibrating installation,
It is characterized in that：It includes calibration card and mechanical module；The calibration card connects the mechanical module；The calibration card includes micro-
Processor, and the microprocessor includes A/D converter；The mechanical module includes dragging motor, coupling mechanism, standard code
Device is dragged motor and magnetic encoder to be calibrated, and described micro- in the magnetic encoder connection to be calibrated calibration card
Processor；Wherein, the magnetic encoder to be calibrated is dragged mounted on described on motor, and the coupling mechanism is electric by the dragging
Machine, described is dragged motor to connect together at the standard coders so that the axis of the dragging motor, the standard coders
Axis and the axis for being dragged motor all on the same axis, the dragging motor will drag the standard coders, the quilt
Motor and the magnetic encoder to be calibrated is dragged to rotate together.
The calibrating installation further includes power module, and the power module connects the calibration card and powers for it；It is described
Power module includes power switch and regulated power supply.
The calibrating installation further includes PC modules, and the PC modules connect the calibration card, for the calibration cartoon
Letter；The PC modules include PC machine and PC communication startup/reset keys；The PC machine is connect with the calibration card, for data
Communication.
The calibrating installation further includes LCD display；The LCD display is connect with the calibration card, for receiving
It states the data information and abnormal conditions that calibration card sends and shows output.
It is communicated between the LCD display and the calibration card using RS-232 communication modes.
The calibrating installation further includes startup/reset key, and the startup/reset key connects the microprocessor, institute
Startup/reset key is stated for starting or resetting entire calibration process.
The calibrating installation further includes mode switching key, and the pattern switching is keyed the microprocessor, the pattern
Switch key is for the switching between calibration mode and normal mode of operation or accuracy detection mode capabilities.
The utility model has the following advantages due to taking above technical scheme：1st, the utility model designs a kind of magnetic
Property encoder calibration principle algorithm, direct construction goes out the exported analog voltage signal of magnetic encoder signal generation point and absolutely
High-precision mapping relations between formula angle value, eliminate the non-linear of magnetic field of permanent magnet, machining accuracy and rigging error etc.
Influence of the factor to measurement effect, so as to which encoder accuracy of detection and resolution ratio be greatly improved.2nd, the utility model is for each
The abnormal conditions occurred in the process are respectively provided with corresponding warning signal output, so that staff goes wrong according to abnormal conditions judgement
The reason of, it investigates in time.3rd, the utility model is detached from PC machine, and in one piece of master board, one-key operation, reduction makes for all operations
With complexity, the manual operation time is reduced.4th, the utility model calibration system hardware optimization design, rational deployment hardware configuration,
Abundant application hardware resource, so as to improve calibration system overall stability, reliability.5th, the utility model from signal acquisition to
The reflection speed finally obtained a result is fast, improves production efficiency, cost is greatly reduced relative to the product of equal performance.6th, originally
The result of utility model output can directly generate the Excel list datas in PC machine, and school is directly displayed by the list data
Quasi- source of error, the reason of when staff directly can obtain occurring calibration error by the Excel list datas, so as to drop
It is low to the requirement of staff's technology.7th, the utility model calibration system hardware optimization design, according to the reasonable cloth of new calibrating principle
Office's hardware configuration, abundant application hardware resource.In view of above reason, the utility model can be widely applied to encoder techniques neck
Domain.
Description of the drawings
Fig. 1 is the structure diagram of the utility model device；
Fig. 2 is the work flow diagram of the utility model device.
Specific embodiment
As shown in Figure 1, a kind of magnetic encoder calibrating installation, including calibration card 1, mechanical module 2, power module 3, PC moulds
Block 4, LCD display 5, startup/reset key 6 and mode switching key 7.
Wherein, calibration card 1 connects mechanical module 2, power module 3, PC modules 4, LCD display 5 respectively.
Wherein, calibration card 1 is the core of the utility model magnetic encoder calibrating installation, it includes microprocessor
11st, random access memory 12, Electrically Erasable Programmable Read-Only Memory 13, interface section 14.Above-mentioned calibration card 1 has high at a high speed
Accuracy data computing capability and multiplex roles signal coordinating processing capacity.
Microprocessor 11 connects random access memory 12, Electrically Erasable Programmable Read-Only Memory 13, startup/reset respectively
Button 6 and mode switching key 7.
Microprocessor 11 includes A/D converter, and the calculating and analysis to data are carried out as main control chip；
Random access memory 12 is used as random storage chip, and carrying out immediate data with microprocessor 11 exchanges, storage meter
Ephemeral data during calculation；
Electrically Erasable Programmable Read-Only Memory 13 is used as scratch pad memory, is obtained for storage microprocessor 11 final
Data.
Interface section 14 include receiving angle signaling interface 141, angle information Sampling Interface 142, PC communication interfaces 143,
Display interface 144 and power interface 145.
Wherein, receiving angle signaling interface 141 is connect with standard coders 23, is sent out for receiving standard coders 23
Angle signal；
Angle information Sampling Interface 142 is connect with magnetic encoder 25 to be calibrated, for receiving magnetic encoder to be calibrated
25 voltage signals sent, and exported magnetic encoder 25 to be calibrated using A/D converter in the microprocessor 11 of calibration card 1
Voltage signal be converted into digital signal；
PC communication interfaces 143 are connect with PC machine 41, using RS-485 communication modes, are led to for carrying out data with PC machine 41
News；
Display interface 144 is connect with LCD display 5, aobvious for being transmitted to LCD display 5 using RS-232 communication modes
Registration evidence and abnormal conditions；
Power interface 145 is connect with regulated power supply 32, so that regulated power supply 32 provides power supply to calibration card 1.
Mechanical module 2 includes dragging motor 21, coupling mechanism 22, standard coders 23, is dragged motor 24 and magnetic to be calibrated
Property encoder 25.
Wherein, magnetic encoder 25 to be calibrated is mounted on and is dragged on motor 24, and coupling mechanism 22 is by dragging motor 21, standard
Encoder 23 is dragged motor 24 to connect together so that the axis of dragging motor 21, the axis of standard coders 23 and is dragged motor 24
Axis all on the same axis, dragging motor 21 will drag standard coders 23, dragged motor 24 and magnetic encoder to be calibrated
25 rotate together.Above-mentioned coupling mechanism 22 mainly includes shaft coupling and coupling spindle, is the prior art, therefore is no longer described in detail.
Power module 3 includes power switch 31 and regulated power supply 32.Power switch 31 is external for controlling whether to access
220V electricity, regulated power supply 32 are supplied to calibration card 1 for external 220V electricity to be converted into constant voltage DC 5V power supplys.
PC modules 4 include PC machine 41 and PC communication startup/reset keys 42.PC machine 41 is connect with calibration card 1, for data
Communication；Whether PC communication startup/reset keys 42 are used to start or reset the data communication between PC machine 41 and calibration card 1.
LCD display 5 is connect with calibration card 1, by RS-232 communication modes, is sent for receiving calibration card 1
Data information and abnormal conditions simultaneously show output.
Startup/reset key 6 is used to start or reset entire calibration process.
Mode switching key 7 is for the switching between calibration mode and normal mode of operation or accuracy detection mode capabilities.
The utility model principle is as follows：1st, data sampling；2nd, data processing；3rd, data are downloaded；4th, accuracy detection：
1) data sampling --- calibration card 1 controls magnetic encoder 25 to be calibrated to be operated under calibration sampling configuration, and leads to
The rotation of control dragging motor 21 is crossed to drive standard coders 23, motor 24 and magnetic encoder to be calibrated 25 is dragged to rotate together；
As soon as calibration card 1 samples standard coders 23 and often turns over a set angle, the number of synchronized sampling magnetic encoder 25 to be calibrated
Word signal, and one group of data is formed with 23 rotation angle value of standard coders, it is stored in calibration card 1, multigroup number is completed in acquisition
According to forming initial data later；
The digital signal of synchronized sampling encoder 25 to be calibrated has three ways, such as follows：
The first, the circuit part of encoder 25 to be calibrated is with the chip for carrying out data processing, and chip is to line during calibration
Property Hall output voltage signal be acquired, be converted to digital quantity, then related Hall exported using RS-485 communications
Voltage signal digital quantity sends calibration card 1 to by angle information Sampling Interface 142；
Second, the circuit part of encoder 25 to be calibrated is without data processing chip, only to linear Hall output
Voltage signal is filtered, after being connect by angle information Sampling Interface 142 with calibration card 1, the data processing of calibration card 1
Chip (A/D converter) carries out analog-to-digital conversion to voltage signal, then carries out data processing；
The third, the circuit part of encoder 25 to be calibrated is without data processing chip, only to linear Hall output
Voltage signal is filtered, and encoder 25 to be calibrated is with using the equipment of this encoder by connecting, the data in equipment
Processing chip carries out analog-to-digital conversion to voltage signal；Then the voltage that equipment again exports related Hall using RS-485 communications is believed
Number digital quantity sends calibration card 1 to by angle information Sampling Interface 142；
2) data processing --- from raw data table, individually extract magnetic encoder 25 to be calibrated certain voltage signal all the way
Value and the one-to-one data form of angle value in standard coders 23；Extraction is per voltage value signal all the way and angle value one successively
One corresponding data form, and it is divided into several sections, curve equation model is carried out, and utilize curve using least square fitting algorithm
Angle value corresponding to equation inverse voltage signal, corresponding 25 signal generation of magnetic encoder point to be calibrated of formation is every to be believed all the way
Number, on the basis of voltage signal resolution ratio, voltage signal values and the one-to-one tables of data of angle value；
3) data are downloaded --- and calibration card 1 communicates with magnetic encoder 25 to be calibrated, the data that step 2) processing is completed
Table downloads to the designated storage area in the processor chips inside magnetic encoder 25 to be calibrated；
4) accuracy detection --- calibration card 1 controls magnetic encoder 25 to be calibrated to be operated in normal mode, and passes through control
Dragging motor 21 controls the rotation of dragging motor 21 to drive standard coders 23, dragged motor 24 and magnetic encoder to be calibrated 25 1
Rotation, while the angle value that standard for manual sampling encoder 23 and magnetic encoder to be calibrated 25 export are played, calculates the two output angle
Difference between value, shaft rotate more than after a week, and the maximum difference that calibration card 1 is calculated is magnetic encoder 25 to be calibrated
Accuracy of detection.
In summary, the utility model direct construction goes out the exported analog voltage letter of magnetic encoder signal generation point
High-precision mapping relations number between absolute type angle value, eliminate the non-linear of magnetic field of permanent magnet, machining accuracy and assembling
Influence of the factors such as error to measurement effect, so as to which encoder accuracy of detection and resolution ratio be greatly improved.The design of calibration method
In, speed and accuracy to sample data transmission determine the efficiency of encoder industrialized production, and transmission speed is faster, calibration
Process time shortens, and transmission accuracy is higher, and alignment error verification number is reduced；It determines to the accuracy of sample signal mapping reconstruction
The Measurement Resolution and precision of encoder are determined, the angle value of signal mapping reconstruction is more accurate, and encoder there can be higher when measuring
Resolution ratio and precision.
Further, as shown in Fig. 2, the utility model magnetic encoder calibrating installation work when key step flow such as
Under：1st, start；2nd, data calibration；3rd, accuracy detection；4th, result exports.
The first step starts：Power module 3 is opened, direct current 5V power supplys are provided to calibration card 1 by regulated power supply 32；Start
PC communicates startup/reset 42, startup function startup/reset, and data sampling starts；
Second step illustrates to be calibrated according to the utility model magnetic encoder calibrating installation operation principle technology, that is, counts
It is downloaded according to sampling, data processing, data；In the process, when there are 21 excessive velocities of operational monitoring dragging motor or when treating
There are one do not connect or one of shakiness that connects is set to exception for calibration magnetic encoder 25 or standard coders 23 and calibration card 1
Situation 1；Interruption is finished receiving when running A/D converter value, when sampling 25 signal data of magnetic encoder to be calibrated less than 3 numbers
For abnormal conditions 2；
Third walks, and illustrates to carry out accuracy detection according to the utility model magnetic encoder calibrating installation operation principle technology；
In the process, when 25 signal generation of magnetic encoder to be calibrated divides the maximum voltage value of institute's output voltage signal not normal
In the range of (in being divided according to 25 signal generation of magnetic encoder to be calibrated, the output voltage model of Hall magnetic induction part on stator
Enclose), it is at this time abnormal conditions 3；
4th step, as a result exports：On the one hand it is by 5 real-time display of LCD display above-mentioned second and third step
Result data and state；On the other hand it is to be communicated by calibration card 1 and PC machine 41, data results is uploaded into PC machine 41
On, it can be further processed and apply.
The result of above-mentioned output can directly generate the Excel list datas in PC machine, directly aobvious by the list data
Show calibration error reason, the reason of when staff can obtain occurring calibration error directly by the Excel list datas, from
And it reduces to the requirement of staff's technology.
In summary, the utility model is respectively provided with corresponding warning signal output for each abnormal conditions occurred in the process,
The reason of being gone wrong so as to staff according to abnormal conditions judgement, investigates in time.
The above is only the specific embodiments of the utility model, but the scope of protection of the utility model is not limited thereto,
In the technical scope that any one skilled in the art discloses in the utility model, variation can be readily occurred in or replaced
It changes, should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model should be with claim
Subject to protection domain.
Claims (7)
1. a kind of magnetic encoder calibrating installation, it is characterised in that：It includes calibration card (1) and mechanical module (2)；The calibration
Block (1) and connect the mechanical module (2)；
The calibration card (1) includes microprocessor (11), and the microprocessor (11) is including A/D converter；
The mechanical module (2) including dragging motor (21), coupling mechanism (22), standard coders (23), dragged motor (24)
With magnetic encoder to be calibrated (25), and the magnetic encoder to be calibrated (25) connect it is described micro- in the calibration card (1)
Processor (11)；
Wherein, the magnetic encoder to be calibrated (25) is dragged mounted on described on motor (24), and the coupling mechanism (22) will
The dragging motor (21), described is dragged motor (24) to connect together at the standard coders (23) so that the dragging electricity
The axis of machine (21), the axis of the standard coders (23) and the axis for being dragged motor (24) are all on the same axis, described to drag
Dynamic motor (21) will drag the standard coders (23), described be dragged motor (24) and the magnetic encoder to be calibrated (25)
It rotates together.
2. a kind of magnetic encoder calibrating installation according to claim 1, it is characterised in that：The calibrating installation further includes
Power module (3), the power module (3) connect the calibration card (1) and power for it；The power module (3) is including electricity
Source switch (31) and regulated power supply (32).
3. a kind of magnetic encoder calibrating installation according to claim 1, it is characterised in that：The calibrating installation further includes
PC modules (4), the PC modules (4) connect the calibration card (1), for communicating with the calibration card (1)；
The PC modules (4) include PC machine (41) and PC communication startup/reset keys (42)；The PC machine (41) and the calibration
Block (1) connection, for data communication.
4. a kind of magnetic encoder calibrating installation according to claim 1, it is characterised in that：The calibrating installation further includes
LCD display (5)；The LCD display (5) connect with the calibration card (1), is transmitted for receiving the calibration card (1)
Next data information and abnormal conditions simultaneously show output.
5. a kind of magnetic encoder calibrating installation according to claim 4, it is characterised in that：The LCD display (5) and
It is communicated between the calibration card (1) using RS-232 communication modes.
6. a kind of magnetic encoder calibrating installation according to claim 1, it is characterised in that：The calibrating installation further includes
Startup/reset key (6), the startup/reset key (6) connect the microprocessor (11), the startup/reset key
(6) for starting or reset entire calibration process.
7. a kind of magnetic encoder calibrating installation according to claim 1, it is characterised in that：The calibrating installation further includes
Mode switching key (7), the mode switching key (7) connect the microprocessor (11), and the mode switching key (7) is for calibrating
Switching between pattern and normal mode of operation or accuracy detection mode capabilities.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721457823.2U CN207487708U (en) | 2017-11-03 | 2017-11-03 | A kind of magnetic encoder calibrating installation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721457823.2U CN207487708U (en) | 2017-11-03 | 2017-11-03 | A kind of magnetic encoder calibrating installation |
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| CN207487708U true CN207487708U (en) | 2018-06-12 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655511A (en) * | 2017-11-03 | 2018-02-02 | 常州寻心电子科技有限公司 | A kind of magnetic encoder calibrating installation and method |
| CN113029221A (en) * | 2021-03-03 | 2021-06-25 | 浙江禾川科技股份有限公司 | Testing equipment of encoder |
| CN113375708A (en) * | 2021-07-21 | 2021-09-10 | 哈尔滨理工大学 | Double-shaft high-resolution magnetoelectric encoder calibration process and device |
-
2017
- 2017-11-03 CN CN201721457823.2U patent/CN207487708U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655511A (en) * | 2017-11-03 | 2018-02-02 | 常州寻心电子科技有限公司 | A kind of magnetic encoder calibrating installation and method |
| CN113029221A (en) * | 2021-03-03 | 2021-06-25 | 浙江禾川科技股份有限公司 | Testing equipment of encoder |
| CN113375708A (en) * | 2021-07-21 | 2021-09-10 | 哈尔滨理工大学 | Double-shaft high-resolution magnetoelectric encoder calibration process and device |
| CN113375708B (en) * | 2021-07-21 | 2022-11-15 | 哈尔滨理工大学 | Double-shaft high-resolution magnetoelectric encoder calibration process and device |
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