CN207439425U - High speed and super precision machine tool chief axis, electro spindle magnetic induction sine and cosine encoder - Google Patents
High speed and super precision machine tool chief axis, electro spindle magnetic induction sine and cosine encoder Download PDFInfo
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- CN207439425U CN207439425U CN201720186216.0U CN201720186216U CN207439425U CN 207439425 U CN207439425 U CN 207439425U CN 201720186216 U CN201720186216 U CN 201720186216U CN 207439425 U CN207439425 U CN 207439425U
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Abstract
The utility model discloses high speed and super precision machine tool chief axis, electro spindle magnetic induction sine and cosine encoder, including the magnetic induction read head for measuring gear and being used cooperatively with measurement gear；The magnetic induction component that cooperation magnet steel detects change of magnetic field strength situation in real time is equipped in magnetic induction read head；Signal conditioning circuit in magnetic induction read head is equipped with cosine and sine signal and nurses one's health driving chip；Magnetic induction component is with measuring the just tangent installation of circumference of gear, magnetic induction component carries out sine and cosine orthogonal differential signal and reference zero differential signal caused by non-contact scanning to measuring gear, driving chip is nursed one's health using cosine and sine signal the DC level error of cosine and sine signal, amplitude error and quadrature phase error are carried out effectively to correct and compensate, and then stablize the cosine and sine signal of the high sine of output high-precision.Its mechanical transmission structure is simple, improves machine tool chief axis positioning, repetitive positioning accuracy, improves numerically-controlled machine tool entirety accuracy in measurement and processing efficiency.
Description
Technical field
The utility model is related to encoder field, more particularly to a kind of high speed and super precision machine tool chief axis, electro spindle magnetic induction
Sine and cosine encoder can be widely applied to the fields such as numerically-controlled machine tool, robot, elevator, aviation and industrial automation.
Background technology
Encoder（Encoder）It is a kind of sensor for detection angles, position, speed and acceleration, is machinery
The angular displacement or straight-line displacement of rotation worked out, be converted to can be used to communication, transimission and storage electrical signal form equipment,
It is the accurate measurement device that machinery is combined closely with electronics, is widely used in the various fields such as motor, automobile, wind-powered electricity generation, robot.
In the industrial production, widely applied encoder is mostly photo-electric, and photoelectric encoder shortcoming is to environmental suitability
Difference, it is weaker for the resistivity of moisture, dust, greasy dirt and temperature change, it needs to do encapsulation process in；Photoelectric encoder light
Grid disk is mostly glass material, when being rotated at a high speed around axis, easily because of the influence of the external environments such as shaft vibration, impact so that grating
Disk fragmentation.
Except photoelectric encoder, magnetic induction encoder is also widely used in industrial production.Magnetic induction encoder is based on magnetic
Sensor, and Magnetic Sensor is widely used in modern industry and electronic product, with induced field intensity and its is distributed to measure
The physical parameters such as electric current, position, direction.In the prior art, there are many different types of sensors for measuring magnetic field and its
His parameter, for example with Hall（Hall）Element, anisotropic magnetoresistance（Anisotropic MagnetoResistance,
AMR）Element, giant magnetoresistance（Gaint MagnetoResistance, GMR）Element, tunnel magneto resistance TMR（Tunnel
MagnetoResistance）Element is the Magnetic Sensor of measurement sensing element.Compared to other magnetic sensor elements, TMR elements
Possesses the advantages that temperature stability and high sensitivity that micro energy lose, high resolution, dynamic range are big, excellent.
In high speed, high-precision, the servo-drive system of high dynamic performance requirement, generally use exports the detection of cosine and sine signal
Element, for position and velocity feedback.The size of displacement is represented with the number of sine and cosine waveform, signal processing is：Just
After cosine signal arriving signal process circuit, in the range of being sampled in CPU, DC voltage base need to be first done to sine wave signal
Level adjusts, and sine wave signal DC reference is made to be located at the midpoint of AD sampling voltage scopes, and amplitude is no more than sampling voltage
After filtering out high frequency and harmonic wave using wave filter, out position and speed are calculated at a high speed by DSP or FPGA in real time for scope.
At present, the installation positioning method of magnetic induction encoder is very coarse, and the positioning reference plane of read head is plane, is being pacified
During dress, using positioning tool it is difficult to ensure that magnetic induction read head center, measure gear, machine tool chief axis installation concentricity, meanwhile,
The positioning reference plane of read head and measurement circumference of gear section are mutually parallel, guarantee of the read head with measuring the distance between gear
Also it is highly difficult, it is very poor so as to cause the accuracy and uniformity of read head actual installation, and then greatly reduce magnetic induction coding
The control accuracy of device.
In magnetic induction sine and cosine encoder engineer application, since fluted disc processing technology, power-supply fluctuation, environment temperature being subject to become
Change, the influence of the factors such as non-linear of read head magnetic induction chip, the sine and cosine letter of position detecting element magnetic induction chip output
Number direct current biasing error, amplitude error and quadrature phase error, harmonic component error, noise error etc. are often accompanied by, directly affected
The precision and reliability of servo-control system.How the angle position signal error of sine and cosine encoder output is effectively repaiied
It just and compensates, and then stablizes the cosine and sine signal of the high sine of output high-precision, follow-up signal process circuit is enable to carry out height
Frequency multiplication interpolation segment, i.e., high-resolution location information is extracted from cosine and sine signal, with meet the high speed of servo-drive system,
High-precision control requires important research and application value.
Utility model content
The technical problem to be solved by the utility model is to the deficiencies in for the above-mentioned prior art, provide a kind of be applicable in
In high speed and super precision machine tool chief axis, electro spindle magnetic induction sine and cosine encoder, which has hypersensitivity, essence using a kind of
Degree and reaction speed, and with measuring magnetoresistive sensor of the gear cooperation with higher advantageous characteristic, using gear induced magnetism
Line operation principle selects magnetoelectricity integrated chip to realize the generation of high reliability cosine and sine signal, is nursed one's health and driven using cosine and sine signal
Dynamic chip carries out the direct current biasing error of cosine and sine signal, amplitude error and quadrature phase error effectively to correct and compensate,
And then stablize the cosine and sine signal of the high sine of output high-precision.Its simple in structure, small, light-weight, easy to install and anti-impact
Hit ability and environmental suitability are strong, reliability is high, anti-vibration, high frequency sound, high-precision, reduce complicated machinery transmission mechanism it is same
When, positioning, the repetitive positioning accuracy of machine tool chief axis greatly improved, so as to improve the whole accuracy in measurement of numerically-controlled machine tool and add
Work efficiency rate.
For solution more than technical problem, the technical solution adopted in the utility model：
A kind of high speed and super precision machine tool chief axis, electro spindle magnetic induction sine and cosine encoder, it is main including being sleeved on machine tool chief axis, electricity
It is read on axis and with the ferromagnetism measurement gear of machine tool chief axis, electro spindle synchronous rotary and the magnetic induction being used cooperatively with measuring gear
Take head；The magnetic induction member device that cooperation magnet steel detects change of magnetic field strength situation in real time is equipped in the magnetic induction read head
Part；Signal conditioning circuit in the magnetic induction read head is equipped with cosine and sine signal and nurses one's health driving chip.
The measurement gear is equipped with sine and cosine orthogonal differential signal output magnetic track and reference zero differential signal output magnetic track；
There are one the centre bores on machine tool chief axis, electro spindle for the measurement gear band；The measurement gear set specifications modulus is 0.2
Or 0.3 or 0.4 or 0.5 or 0.6 or 0.8 or 1.0 or 2.0.
The magnetic induction read head includes external metallization housing, is arranged on the in vivo first circuit board of outer metallic shell, magnetic
Steel, electrical connector, second circuit board, input/output interface terminal；Cooperation magnet steel is provided on first circuit board to magnetic field intensity
The magnetic induction component that situation of change is detected in real time；The letter being electrically connected with magnetic induction component is provided on second circuit board
Number modulate circuit and the storage circuit to connect with signal conditioning circuit, input/output interface circuit.
The external metallization housing includes upper cover cylinder body and spiral-lock directly over cylinder body, passes through spiral shell between cylinder body and upper cover
Nail or solid gum are attached；The first circuit board and second circuit board are arranged in the annular seal space that cylinder body is formed with upper cover.
The seating side of the magnetic induction read head is in same level, magnetic induction component with measuring the side of gear
With measuring the just tangent installation of circumference of gear.
The magnetic induction reads casing and is equipped with installation convex ribs, and the housing bottom of magnetic induction read head, which is equipped with, to be easily installed
Symmetrical convex ribs, symmetrical fin height one show realize magnetic induction component and measure the just tangent installation of circumference of gear, that is, realize
Magnetic induction component center measures gear, the concentricity of machine tool chief axis installation.
The utility model has the advantages that：
1. the utility model heavy caliber hollow shaft is installed, without complicated mechanical transmission structure, any axis need not be carried
Hold, it is not required that any machenical coupling, measure direct geared be sleeved on machine tool chief axis, on electro spindle and with machine tool chief axis,
Electro spindle synchronous rotary.High-precision encoder and machine tool chief axis, electro spindle is direct-connected, it is same in the error that reduction transmission device is brought
When, processing, positioning accuracy greatly improved.The method can solve photoelectric encoder and rotate to axial float and circular runout at a high speed
The problems such as sensitive, improve the adaptability of product, and with a series of excellent drive characteristics, especially suitable for machine tool chief axis,
Electro spindle high speed and high precision processing occasion；
2. the utility model accuracy of detection is high and can carry out high-speed response.Magnetic induction read head has selected high-precision sensing
Chip using gear induced magnetism line operation principle, can identify the angle position that gear is measured immediately below chip, realize
In high precision, high reliability detects；Cosine and sine signal conditioning driving chip is selected to carry out the various errors of cosine and sine signal effective
It corrects and compensates, and then stablize the cosine and sine signal of the high sine of output high-precision, follow-up signal process circuit is enable to carry out
High frequency multiplication interpolation subdivision, so as to generate finer and smoother positional value；
3. the simplification of the utility model magnetic induction encoder mechanical structure is firm, measures and adopted between gear and magnetic induction read head
With it is non-contact, design without abrasion, there is the characteristic of anti-vibration, anticorrosive, antipollution and wide operating temperature, fast response time, energy
High speed rotary motion is adapted to, can be applied to the immalleable field of photoelectric encoder, precision is high, long lifespan, direct-drive machinery
Error is small, and without mechanism back clearance problem；
4. the utility model magnetic induction read head structure novel, design are firm, strong shock resistance, degree of protection height, can
Up to IP68, good environmental adaptability, stable and reliable working performance, accurate positioning, installation are easy and easy to use.
Description of the drawings
Fig. 1 is the utility model high speed and super precision machine tool chief axis, electro spindle magnetic induction sine and cosine encoder overall structure is illustrated
Figure；
Fig. 2 measures gear structure side schematic view for the utility model, and sine and cosine is indicated respectively in figure（A、B）Orthogonal differential
Signal output magnetic track and reference zero（Z）Differential signal exports magnetic track；
Fig. 3 is the utility model magnetic induction read head internal structure schematic diagram；
Fig. 4 A are a kind of cosine and sine signal output waveform diagram of the utility model；
Fig. 4 B are another cosine and sine signal output waveform diagram of the utility model.
Specific embodiment
The following content is combine specific preferred embodiment further detailed description of the utility model, it is impossible to
Assert that the specific implementation of the utility model is confined to these explanations.
With reference to shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4 A and Fig. 4 B, the utility model high speed and super precision machine tool chief axis, electro spindle magnetic strength
Sine and cosine encoder is answered to include being sleeved on machine tool chief axis, on electro spindle and with the ferromagnetism of machine tool chief axis, electro spindle synchronous rotary
The magnetic induction read head 2 for measuring gear 1 and being used cooperatively with measuring gear 1；The measurement gear 1 is mounted on rotation there are one setting
Centre bore 3 on main shaft；The magnetic induction read head 2, which is located at, measures 1 outside top of gear.
In encoder installation positioning, referring to the drawings 1, realize 2 seating side of magnetic induction read head with measuring at 1 side of gear
In same level, adjustment magnetic induction read head 2 and the gap measured between gear 1 are 0.1 to 0.3mm, it is recommended to use standard
The clearance gauge of thickness, such as 0.15 millimeter.It is in addition, symmetrical convex equipped with being easily installed in the bottom of the metal shell of magnetic induction read head
Muscle 17, symmetrical convex ribs 17 are located at the both sides of metal shell bottom, and the symmetrical convex ribs 17 of both sides are highly consistent, to realize magnetic induction member
Device and measure that circumference of gear is just tangent, that is, realize magnetic induction component center, measure gear, machine tool chief axis installation it is concentric
Magnetic induction read head and read head fixing base, are then fastenedly connected by degree by screw, finally extract clearance gauge out or rotation measures
Gear takes out clearance gauge.
Referring to the drawings 2, for measurement gear 1 tool there are two types of magnetic track, one is sine and cosine（A、B）Orthogonal differential signal exports
Magnetic track, the number of teeth preferably 512 teeth；Secondly it is reference zero（Z）Differential signal exports magnetic track.Reference zero（Z）Differential signal exports
Magnetic track only lacks a tooth than sine and cosine magnetic track for a circle.In normal use condition and range, client can be according to actual main shaft
Or the requirement in motor space is to measuring the outside diameter of gear, thickness, hole size and modulus require, provide specification modulus for 0.2,
0.3rd, 0.4,0.5,0.6,0.8,1.0,2.0 measurement gear 1 measures notably square when gear 1 is installed with magnetic induction read head 2
To, it is necessary to corresponding installation up and down is carried out, otherwise signal is bad.
The magnetic induction read head 2 includes external metallization housing 4, the first circuit board being arranged in external metallization housing 4
5th, magnet steel 6, electrical connector 7, second circuit board 8, input/output interface terminal 9 are provided with cooperation magnet steel 6 on first circuit board 5
To the magnetic induction component 10 that change of magnetic field strength situation is detected in real time, it is provided on second circuit board 8 and magnetic induction member
The signal conditioning circuit 11 of the electrical connection of device 10 and the storage circuit 12 to connect with signal conditioning circuit 11, input/output interface electricity
Road 13.The 2 external metallization housing 4 of magnetic induction read head uses copper alloy or aluminum alloy material, including cylinder body 14 and spiral-lock
Upper cover 15 directly over cylinder body 14, is attached by screw or solid gum between cylinder body 14 and upper cover 15, and carries out electronics
Casting glue seals, and its outside is electrically connected equipped with metal waterproof connector 16 with input/output interface circuit 13, realizes sine and cosine letter
Number output.
In work, machine tool chief axis, electro spindle drive measurement gear 1 to rotate, on the first circuit board 5 of magnetic induction read head 2
Magnetic induction component 10 coordinate magnet steel 6, using the operation principle of gear induced magnetism line, change of magnetic field strength situation is carried out
The generation of high reliability cosine and sine signal is realized in detection in real time；Signal tune on second circuit board 8 is connected by electrical connector 7
Circuit 11 is managed, shaping is carried out to signal, filters out high frequency spurs, driving chip is nursed one's health to magnetoresistive sensor using cosine and sine signal
（Magnetic resistance encoder）DC level error, amplitude error and the quadrature phase error equal error of the cosine and sine signal of generation are had
The amendment and compensation of effect, and then via 10 core shielded twisted pair lines, the encoder for stablizing the high sine of output high-precision is just remaining
String signal.
There are multiple registers in cosine and sine signal conditioning driving chip, may be programmed the sine wave signal that sensor is set to export
Offset, amplification factor and phase error etc., by powerful host computer PC software, can measure and analyze direct current biasing, width
Then value, quadrature phase equal error are adjusted by using the mode that correction value is write to digital circuit register, compensate,
And correction value write storage circuit 12 is preserved automatically.When system powers on again, the ginseng of the preservation of storage circuit 12 is called in automatically
Number is realized the real-time compensation to encoder output, is corrected, and then exports the encoder sine and cosine letter of the high sine of high-precision
Number.
Magnetoresistive sensor had both exported periodic sine and cosine（A、B）Orthogonal differential signal often rotates a circle and also exports all the way
Reference zero（Z）Differential signal, this signal are used to determine the information such as speed, position.Reference zero differential signal passes through signal tune
After managing circuit 11 and the processing of input/output interface circuit 13, two kinds of output forms of encoder output reference zero signal compatibility.
The precision that gear 1 is processed is measured to have a huge impact the precision and uniformity of cosine and sine signal.Specifically should
In, the precise measure gear 1 of 6 grades of national standard or higher precision should be selected.Cosine and sine signal waveform quantity can be by measuring gear
The number of teeth is adjusted, and and then influence machine tooling, positioning accuracy.
The magnetic induction sine and cosine encoder output signal is 1Vpp sine increment signals, can be in follow-up signal process circuit
It is middle it is stable carry out 1024 times and above interpolation subdivision, maximum speed can to 20000 revs/min and more than, can be widely applied to count
Control the fields such as lathe, robot, elevator, aviation and industrial automation.
For the utility model person of an ordinary skill in the technical field, the utility model design is not being departed from
Under the premise of, several simple deduction or replace can also be made, should all be considered as belonging to the scope of protection of the utility model.
Claims (6)
1. high speed and super precision machine tool chief axis, electro spindle magnetic induction sine and cosine encoder, it is characterised in that：Including being sleeved on machine tool chief axis
Or be used cooperatively on electro spindle and with the ferromagnetism of machine tool chief axis or electro spindle synchronous rotary measurement gear and with measurement gear
Magnetic induction read head；The magnetic that cooperation magnet steel detects change of magnetic field strength situation in real time is equipped in the magnetic induction read head
Sensing component；Signal conditioning circuit in the magnetic induction read head is equipped with cosine and sine signal and nurses one's health driving chip；The magnetic
Sensing component and the just tangent installation of circumference for measuring gear, magnetic induction component carry out non-contact scanning production to measuring gear
Raw sine and cosine orthogonal differential signal or reference zero differential signal, the cosine and sine signal nurse one's health driving chip to cosine and sine signal
Direct current biasing error, amplitude error and quadrature phase error be modified and compensate.
2. high speed and super precision machine tool chief axis described in accordance with the claim 1, electro spindle magnetic induction sine and cosine encoder, feature exist
In：The gear that measures sets that there are one the centre bores being mounted on machine tool chief axis or electro spindle；The measurement gear set specifications modulus
For 0.2 or 0.3 or 0.4 or 0.5 or 0.6 or 0.8 or 1.0 or 2.0.
3. high speed and super precision machine tool chief axis described in accordance with the claim 1, electro spindle magnetic induction sine and cosine encoder, feature exist
In：The magnetic induction read head includes external metallization housing, is arranged on the in vivo first circuit board of outer metallic shell, magnet steel, electricity
Connector, second circuit board, input/output interface terminal；Cooperation magnet steel is provided on first circuit board to change of magnetic field strength feelings
The magnetic induction component that condition is detected in real time；The signal condition being electrically connected with magnetic induction component is provided on second circuit board
Circuit and the storage circuit to connect with signal conditioning circuit, input/output interface circuit.
4. high speed and super precision machine tool chief axis described in accordance with the claim 3, electro spindle magnetic induction sine and cosine encoder, feature exist
In：The external metallization housing includes upper cover cylinder body and spiral-lock directly over cylinder body, between cylinder body and upper cover by screw or
Solid gum is attached；The first circuit board and second circuit board are arranged in the annular seal space that cylinder body is formed with upper cover.
5. high speed and super precision machine tool chief axis described in accordance with the claim 1, electro spindle magnetic induction sine and cosine encoder, feature exist
In：The seating side of the magnetic induction read head is in same level with measuring the side of gear.
6. according to high speed and super precision machine tool chief axis, electro spindle magnetic induction sine and cosine encoder described in claim 5, feature exists
In：The magnetic induction reads casing and is equipped with installation convex ribs.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720186216.0U CN207439425U (en) | 2017-02-28 | 2017-02-28 | High speed and super precision machine tool chief axis, electro spindle magnetic induction sine and cosine encoder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720186216.0U CN207439425U (en) | 2017-02-28 | 2017-02-28 | High speed and super precision machine tool chief axis, electro spindle magnetic induction sine and cosine encoder |
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| CN207439425U true CN207439425U (en) | 2018-06-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111089610A (en) * | 2019-12-28 | 2020-05-01 | 浙江禾川科技股份有限公司 | Signal processing method and device of encoder and related components |
| CN112013883A (en) * | 2020-09-07 | 2020-12-01 | 吉林省中业光电技术有限公司 | High-speed magnetic-sensing gear type incremental encoder with homing function |
-
2017
- 2017-02-28 CN CN201720186216.0U patent/CN207439425U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111089610A (en) * | 2019-12-28 | 2020-05-01 | 浙江禾川科技股份有限公司 | Signal processing method and device of encoder and related components |
| CN112013883A (en) * | 2020-09-07 | 2020-12-01 | 吉林省中业光电技术有限公司 | High-speed magnetic-sensing gear type incremental encoder with homing function |
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