CN107270945A - A kind of automatic code sensor to pole - Google Patents
A kind of automatic code sensor to pole Download PDFInfo
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- CN107270945A CN107270945A CN201710327011.4A CN201710327011A CN107270945A CN 107270945 A CN107270945 A CN 107270945A CN 201710327011 A CN201710327011 A CN 201710327011A CN 107270945 A CN107270945 A CN 107270945A
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- magnetic
- sensor
- body assembly
- encoder
- pole
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- 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
- G01D5/12—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 using electric or magnetic means
- G01D5/14—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 using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—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 using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/145—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 using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
Abstract
The invention discloses a kind of automatic code sensor to pole, it includes：Magnetic encoder and sensor body assembly, magnetic encoder produce the continuous magnetic field of mechanical periodicity relative to the rotatable setting of sensor body assembly；Sensor body assembly never gathers the variation magnetic field for coming from the generation of spin magnetization encoder with azimuth synchro, and correspondence exports absolute magnitude formula signal；The signal that can be also arrived simultaneously according to synchronous acquisition is carried out to pole computing.What the present invention was provided there is the automatic sensor to pole function can greatly simplify the sensor installation of permagnetic synchronous motor, and can significantly shorten the follow-up debug time using during permagnetic synchronous motor, reduce maintenance difficulty.
Description
Technical field
The present invention relates to sensor, it is specifically designed for detecting the sensor of rotor-position.
Background technology
Permagnetic synchronous motor install for detect rotor-position sensor after need to demarcate sensor, with detect
The angle gone out between the position signalling and rotor physical location of sensor output.
Demarcation action is detected with angle detection means, finally drawn generally after permagnetic synchronous motor installation
Angle between the position signalling and rotor physical location of sensor output, this angle data will be used to control permanent magnet synchronous electric
In the controller of machine.Therefore need by modes such as laser beam markings to mark angle data on the nameplate of permagnetic synchronous motor.
System debug person is in debugging control device and the permagnetic synchronous motor with sensor, it is necessary to by permagnetic synchronous motor
In the corresponding parameter position of angle data input controller on nameplate, to reach more preferable control effect.Such sensor
Scheme haves the shortcomings that many in actual application process：
1. the angle between the position signalling and rotor physical location that are exported due to sensor is skimble-scamble, it is therefore desirable to
Increase the process for recording the angle data in the fabrication process, while needing the special laser beam marking equipment of outfit or other quarters
Printing apparatus, not only increases cost and also add manufacturing man-hours.
2. due to the disunity of angle, system debug person needs one by one that the angle data on permagnetic synchronous motor nameplate are defeated
Enter controller, add the complexity during use.
3. by after the angle data input of corresponding permagnetic synchronous motor in controller, controller and permagnetic synchronous motor are only
It can correspond, it is impossible to exchanged with other controllers or permagnetic synchronous motor.
4. in maintenance, due to the difference of angle data, controller or permagnetic synchronous motor can not all be realized and inserted i.e.
With, it is necessary to which technical professional completes angle data input.
The content of the invention
For above-mentioned existing sensor, it is necessary to which a kind of can be automatically performed the biography to pole the problems of in terms of to pole
Sensor.
Therefore, the technical problems to be solved by the invention are to provide a kind of automatic code sensor to pole.
In order to solve the above-mentioned technical problem, the automatic code sensor to pole that the present invention is provided, including：
Magnetic encoder, the magnetic encoder produces cycle change relative to the rotatable setting of sensor body assembly
The continuous magnetic field changed；
Sensor body assembly, the sensor body assembly never comes from spin magnetization coding with azimuth synchro collection
The variation magnetic field that device is produced, and determine therefrom that the rotation position of magnetic encoder and to pole computing.
In this sensor plan, the continuous magnetic field for the mechanical periodicity that the magnetic encoder rotation is produced, one week
Magnetic field intensity in phase is in Sine distribution.
In this sensor plan, multipair magnetic pole can be set in one week of magnetic encoder.
In this sensor plan, the sensor body assembly carries out addition of waveforms to the signal collected, calculates
Absolute magnitude formula signal.
In this sensor plan, the sensor body assembly is by some magnetic induction chips along magnetic encoder
Direction of rotation, never gathers the mechanical periodicity magnetic field for coming from the generation of spin magnetization encoder, and form correspondence with azimuth synchro
Voltage signal.
In this sensor plan, some magnetic induction chips are circumferentially distributed.
In this sensor plan, using 1-36 magnetic induction chip in the sensor body assembly.
In this sensor plan, the sensor body assembly receive it is automatic pole is instructed when storage sensors
Current initial position output information, and in follow-up signal of change output procedure, will be according to initial position output information pair
Obtained current location information is calculated to be adjusted, it is automatic to eliminate physical location and position corresponding to sensor outgoing position signal
Between position deviation.
In this sensor plan, the sensor body assembly using the sensor initial position output information that stores as
Position deviation, in follow-up signal of change output procedure, the positional information that calculating is obtained subtracts initial position output letter
Breath, to eliminate position deviation.
The present invention can quickly realize in permagnetic synchronous motor manufacturing process to pole process, greatly reduce permanent magnet synchronous electric
The sensor set-up time of machine.
Simultaneously, it can be ensured that permagnetic synchronous motor is completed after sensor installs, sensor output signal and rotor
Physical location deviation is zero, so as to simplify the debugging flow of subsequent controllers.
Furthermore, the circuit design of the magnetic code sensor is simple, and implementation is ingenious, so that Innovation Input is few, cost
It is low.
Brief description of the drawings
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 is the automatic main schematic diagram to pole sensor in present example；
Fig. 2 is the automatic sectional view to pole sensor in present example；
When Fig. 3 rotates for magnetic encoder in present example, the continuous magnetic field schematic diagram of mechanical periodicity is exported.
Fig. 4 is the assembling schematic diagram of sensor body assembly in present example；
Fig. 5 arranges schematic diagram for the position of magnetic induction chip in sensor in present example.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, tie below
Conjunction is specifically illustrating, and the present invention is expanded on further.
Referring to Fig. 1, it show the structural representation with the automatic sensor to pole function of this programme offer.The biography
Sensor is used in permagnetic synchronous motor, can be achieved automatically to pole, accurately detects rotor-position.
As seen from the figure, this mainly includes magnetic encoder 110, sensor body assembly 120 to the sensor 100 of pole automatically
Two parts.
Wherein, magnetic encoder 110 is used to connect target object to be measured (rotor in such as permagnetic synchronous motor), and its is relative
In the rotatable setting of sensor body assembly 120, and with the continuous magnetic field of rotation generation mechanical periodicity.
The magnetic encoder 110 is preferably non-contacting to be embedded in sensor body assembly 120, and can be existed with target object
Rotated in sensor body assembly 120.In addition, while magnetic encoder 110 rotates with target object, output mechanical periodicity
Continuous magnetic field.Here the continuous magnetic field of mechanical periodicity is that in a swing circle, magnetic field intensity is in Sine distribution.
Sensor body assembly 120 coordinates with magnetic encoder 110, and never comes from rotary magnetic with azimuth synchro collection
Property encoder 110 variation magnetic field, pass through calculate correspondence output absolute magnitude formula signal；Based on the signal, magnetic can be accurately obtained
The rotation of encoder 110 absolute angular position, rotary speed and direction of rotation.
In practical application, due to the reason of installation so that target object (such as rotor) physical location to be measured and sensor
There will be error between the position signalling of signal output.In order to effectively eliminate the error, this sensor body assembly 120 will be carried out
It is automatic that pole is handled.
The sensor body assembly 120 senses the change magnetic that spin magnetization encoder is produced by corresponding magnetic induction chip
, corresponding voltage signal is formed, and computing is overlapped to the voltage signal collected, finally draw target object to be measured
(such as rotor) current location information；Meanwhile, it is capable to calculate automatically between sensor outgoing position signal and rotor physical location
Deviation, and the influence of this deviation is automatically processed and then eliminated during follow-up signal output.
In this programme, the sensor body assembly is automatic to pole by, to pole instruction triggers, being carried out from outside.Here, pass
Sensor body assembly 120 can be by Digital I/O, and bus is such as, but not limited to SPI, SSI, CAN, RS422, RS485 etc., to receive
What is responded instructs to pole.
Current sensor is calculated obtained initial bit by the sensor body assembly after being instructed to pole of outside is received
Put output signal data A to be stored in the internal memory of sensor body assembly 120, and calculate defeated in follow-up position signalling
During going out, sensor body 120 calculates and obtains current location output information data B first, then subtracts and is stored in sensing
Initial position output signal data A in body 120, then output signal, it is thus automatic to pole to realize, it is then automatic to eliminate real
Position deviation between position corresponding to border position and sensor outgoing position signal.
Thus the sensor 100 constituted can be realized automatically to pole, used when being arranged in permagnetic synchronous motor
Cheng Zhong, without exclusively for sensor arrange parameter and the cumbersome debugging of progress, permagnetic synchronous motor can be greatly simplified again
Sensor is installed, and can significantly shorten the follow-up debug time using during permagnetic synchronous motor, reduces maintenance difficulty.
For above-mentioned principle scheme, present principles scheme is further explained below by way of a concrete application example.
Referring to Fig. 1 and Fig. 2, it is automatic main including magnetic encoder as described above to pole sensor 100 that this example is provided
110th, two parts of sensor body assembly 120.
Wherein, magnetic encoder 110 is annular magnet encoder 110, different magnetization curves is exported by rotating, so that ring
Shape sensor body assembly 120 senses different magnetic field intensities, then can determine that the rotation position of magnetic encoder 110, so that
It can determine that target object to be measured (such as rotor) physical location.
Referring to Fig. 2, it show the structural representation of annular magnetic encoder 110 in this example.As seen from the figure, the annular
Magnetic encoder 110 is main to be cooperated and is constituted by magnetic material 111 and support retainer plate 112.Magnetic material 111 is solid along support
Surely the circumferencial direction of circle 112 is laid on the lateral surface of support retainer plate 112.
Here support retainer plate 112, for the magnetic material 111 that supports and shape, and prevents the broken of magnetic material 111
Damage, while also having poly- magnetic (collection magnetic) function.Collection magnetic function based on the support retainer plate 112, can effectively prevent external magnetic field
Interference to magnetic material 111, make magnetic material 111 the magnetic line of force be distributed it is more uniform, magnetic direction gathers the radial direction to magnet ring,
Magnetic field intensity is more controllable.
The annular magnet encoder 110 constituted based on such scheme, it is in by being molded the magnetic field in performance period of magnetizing
Sine distribution, while thus this annular magnet encoder 110 rotates with target object, by the exportable cycle as shown in Figure 3
The continuous magnetic field of change, magnetic field intensity is in Sine distribution.
When specific, n can be set to magnetic pole in this annular magnet encoder 110 in a swing circle (in i.e. 360 °),
By the n that magnetizes to magnetic pole, n mechanical periodicity is realized (in i.e. 360 °) in a swing circle of annular magnet encoder 110
Magnetic field.Here n can according to the actual requirements depending on, in this example be preferably 1 to 20, thereby guarantee that subsequent sensor body assembly
The precision of detection.
As an example, 1 pair of magnetic pole (as shown in Figure 4) can be set in this example (in i.e. 360 °) in a swing circle,
The magnetic field of 1 mechanical periodicity is realized (in i.e. 360 °) in a swing circle of annular magnet encoder 110.
Referring to Fig. 1 and Fig. 4, in order to coordinate the sensor body assembly in above-mentioned annular magnet encoder 110, this example
120 is generally annular, and it mainly includes some magnetic induction chips 122, detection computing module 121 and output lead 123 etc.
Several parts.
Some magnetic induction chips 122, are the sensing element in loop sensor body assembly 120, for induced magnetism
The changes of magnetic field that encoder 110 is produced when rotating, forms corresponding voltage signal.
Magnetic induction chip 122 in this example is made up of Hall or magnetoresistive chip, preferably five, for magnetic induction chip
122 quantity is not limited to five, and 1 to 36 can be used as needed.
This five magnetic induction chips 122 in this example correspond to annular magnet encoder 110, are disposed in a circumferential direction
Detect on computing module 121, correspond to ring while being formed in the inner side for five magnetic induction chips 122 being along the circumferential direction distributed
The circular induction region 124 of shape magnetic encoder 110.
The size of the circular induction region 124 is corresponding with the size of annular magnet encoder 110, can hold annular magnet coding
Device 110 is non-contacting, be rotatably placed in it.
Thus when annular magnet encoder 110 rotates in circular induction region 124, due to annular magnet encoder
The specific magnetic curve having on 110 so that magnetic field constantly changes on annular magnet encoder 110, and five magnetic induction
Chip 122 is respectively from the diverse location synchronously corresponding magnetic field signal of sensing, and it is (i.e. specific to export corresponding specific induced signal
Voltage signal), i.e., the magnetic field signal of diverse location is sensed by the way that five magnetic induction chips 122 are synchronous, so as to export specific letter
Number with correspondence diverse location.
Detection computing module 121 in this example is the Signal Processing Element in whole sensor 100, in this example preferably
Corresponding circuit board is constituted, and the circuit board is annular circuit board, for carrying magnetic induction chip 122, and carry out at signal
Reason.
The circuit board 121 is connected with five magnetic induction chips 122, is received and is handled five inductance loops of magnetic induction chip 122
The periodical magnetic filed that shape magnetic encoder 110 is produced when rotating changes formed voltage signal, exports absolute magnitude formula signal.Together
When based on the signal operation go out sensor signal output target object to be measured (such as rotor) physical location between deviation, and
The influence of this deviation is automatically processed and then eliminated during follow-up signal output.
When implementing, for the signal that efficiently accurate five magnetic induction chips 122 of processing are transmitted, the circuit board 121
In be integrated with counting circuit, the counting circuit carries out addition of waveforms, output absolute magnitude formula letter to the signal specific of magnetic induction chip
Number, subsequently determine therefrom that the rotation position of magnetic encoder and to pole computing.
Wire 123 in this example is the signal output component in whole sensor 100, such as wire harness with connector, its
One end is connected with the output end of annular circuit board 121, and the other end can be connected with corresponding application circuit or equipment, by circuit board
The 121 signal outflows produced.
Non-contact type magnetic code sensor can be formed according to the embodiment above, the sensor when specifically used,
Magnetic encoder 110 therein is connected with target object to be measured, it is non-contacting to be placed in loop sensor body assembly 120
Circular induction region in；Thus can be with circular induction region inward turning of the target object in loop sensor body assembly 120
Turn；Simultaneously by loop sensor body assembly 120 is by the wire harness 123 with connector thereon and corresponding application circuit or sets
It is standby to be attached.
The magnetic field that magnetic encoder 110 therein is magnetized in performance period by being molded is in Sine distribution, magnetic encoder
While rotation with target object, export the continuous magnetic field of mechanical periodicity (magnetic field intensity is in Sine distribution).
Sensor after power up, passes through the 5 magnetic induction chips 122 (Hall or magnetoresistive chip) of distribution on circuit boards
Synchronous acquisition comes from the variation magnetic field of spin magnetization encoder generation, forms corresponding voltage signal and reaches circuit board 121.
Referring to Fig. 5, magnetic induction chip 122 is distributed phase between the surrounding of annular magnetic encoder 110, adjacent magnetic induction chip
Every certain angle α, angle spacing bias β, magnetic chip number m, angle [alpha], the magnetic field number n of mechanical periodicity pass in β and a revolution
Following rule is observed by system：
The ÷ n ÷ m of α=360；(1)
β=α × 0.45；(2)
For example：For the magnet ring of 1 number of pole-pairs, the scheme of 5 magnetic induction chips, the interval angles of adjacent magnetic induction chip are α
The ÷ 5=72 degree of=360 ÷ 1, angle spacing bias β=72 × 0.45=32.4 degree.
Adjacent magnetic induction chip chamber, which is separated by angle [alpha] and angle spacing bias β, accordingly can accurately determine spin magnetization encoder
Rotation position.
In this example, magnetic induction chip 122 is distributed between the surrounding of annular magnetic encoder 110, adjacent magnetic induction chip
It is separated by 72 degree, the magnetic field intensity in sinusoidal variations produced when being rotated from the synchronous induced magnetism encoder 110 of five different azimuths,
Thus five road voltage signals are produced, and synchronously reach circuit board 121.
Circuit board 121 is received to after the instruction of pole, circuit board 121 is primarily based on the letter for the magnetic induction chip for coming from five tunnels
Number addition of waveforms computing is carried out, calculate and obtain result A (result A is defeated to calculate obtained current sensor initial position
Go out signal data), and result of calculation A is stored in circuit board 121.Using result of calculation A as position in follow-up calculating process
Deviation, it is automatic to pole to realize.
Then, circuit board 121 carries out addition of waveforms computing by counting circuit to five road signals, calculates result B (knots
The current location output information data that fruit B obtains for calculating), result of calculation B is subtracted and is stored in circuit board by signal output apparatus
A in 121, final calculation result B-A is exported, then automatic to eliminate corresponding to physical location and sensor outgoing position signal
Position deviation between position.
It can be seen that, this non-contact type magnetic code sensor can accurately measure speed and the absolute position of rotating object, together
When can also by by install caused by permanent-magnetic synchronous motor rotor physical location and sensor signal output between error pass through pass
The automatic of sensor eliminates to pole function.
In addition, this non-contact type magnetic code sensor uses contactless magnetic induction principle, with without abrasion, long-life
Feature；And its internal 1 to 36 magnetic induction chips of use (Hall or magnetoresistive chip) arrangement, signal accuracy is greatly improved,
And cost performance highest.
Furthermore, the design of this non-contact type magnetic code sensor integral moduleization, compact conformation, it is easy to tested application collection
Into such as bearing.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (10)
1. a kind of automatic code sensor to pole, it is characterised in that including：
Magnetic encoder, the magnetic encoder produces mechanical periodicity relative to the rotatable setting of sensor body assembly
Continuous magnetic field；
Sensor body assembly, the sensor body assembly never comes from the production of spin magnetization encoder with azimuth synchro collection
Raw variation magnetic field, and determine therefrom that the rotation position of magnetic encoder and to pole computing.
2. code sensor according to claim 1, it is characterised in that the cycle that the magnetic encoder rotation is produced becomes
Magnetic field intensity in the continuous magnetic field changed, its a cycle is in Sine distribution.
3. code sensor according to claim 1, it is characterised in that can be set in one week of magnetic encoder
Multipair magnetic pole.
4. code sensor according to claim 1, it is characterised in that the sensor body assembly is to the letter that collects
Number carry out addition of waveforms, calculate absolute magnitude formula signal.
5. code sensor according to claim 1, it is characterised in that the sensor body assembly passes through some magnetic
Direction of rotation of the induction chip along magnetic encoder, never gathers the week for coming from the generation of spin magnetization encoder with azimuth synchro
Phase variation magnetic field, and form corresponding voltage signal.
6. code sensor according to claim 5, it is characterised in that some magnetic induction chips are circumferentially distributed.
7. code sensor according to claim 5, it is characterised in that 1-36 is used in the sensor body assembly
Magnetic induction chip.
8. code sensor according to claim 5, it is characterised in that the sensor body assembly is according to adjacent magnetic strength
Answer and be separated by angle [alpha], and angle spacing bias β to calculate the rotary position information of magnetic encoder between chip；
The ÷ n ÷ m (1) of α=360
β=α × 0.45 (2)
Wherein, m is magnetic chip number, and n is the magnetic field number of mechanical periodicity in one revolution of magnetic encoder.
9. code sensor according to claim 1, it is characterised in that the sensor body assembly is being received certainly
Storage sensors current initial position output information when being instructed to pole is moved, and in follow-up signal of change output procedure, will
The current location information obtained according to initial position output information to calculating is adjusted, automatic to eliminate physical location and sensor
Position deviation between position corresponding to outgoing position signal.
10. code sensor according to claim 9, it is characterised in that biography of the sensor body assembly to store
Sensor initial position output information is as position deviation, in follow-up signal of change output procedure, the position that calculating is obtained
Information subtracts the initial position output information, to eliminate position deviation.
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| CN201710327011.4A CN107270945B (en) | 2017-05-10 | 2017-05-10 | Automatic antipodal coding sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108286990A (en) * | 2018-04-02 | 2018-07-17 | 上海钧嵌传感技术有限公司 | A kind of sensor with Dual-path backup signal |
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