CN112556732A - Magnetoelectric angle sensor, encoder and motor - Google Patents
Magnetoelectric angle sensor, encoder and motor Download PDFInfo
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Abstract
The invention discloses a magnetoelectric angle sensor, an encoder and a motor, and the device comprises: a magnetic angle sensor configured to generate a two-way differential analog signal by sensing a magnetic field change; the single-turn sampling unit is configured to sample single-turn data based on the two-way differential analog signal; a multi-turn sampling unit configured to sample multi-turn data based on the two-way differential analog signal; if one circle is counted according to a set period, the multi-circle data comprises data with more than two set periods; the processor is configured to process the single-turn data obtained by sampling to obtain single-turn position information; and processing the multi-turn data obtained based on sampling to obtain multi-turn position information. This scheme can direct output encoder single circle position and the many rings of positions of encoder through making magnetoelectric angle sensor to enlarge magnetoelectric angle sensor's application scenario.
Description
Technical Field
The invention belongs to the technical field of motors, and particularly relates to a magnetoelectric angle sensor, an encoder and a motor, in particular to a magnetoelectric angle sensor chip framework, an encoder with the magnetoelectric angle sensor chip framework and a motor using the encoder to measure position information.
Background
The angle measurement is divided into horizontal angle measurement and vertical angle measurement. Horizontal angular measurements are used to determine the plane position of the ground points, and vertical angular measurements are used to indirectly determine the elevation of the ground points and the distance between the points. The angle measurement is widely used in multiple fields of military, industry, aerospace, automobiles and the like. For example: for a rudder angle acquisition system of a ship, the acquisition precision and stability of the angle have very important influence on the performance of the automatic rudder of the ship. The inclination measurement of the vehicle may provide the vehicle with a variety of information. With the continuous development of the construction industry, the requirements on the construction angle measuring instrument are also continuously improved. In the automotive industry, it is often desirable to measure the torsional angle of its engine.
In the related scheme, miniaturization becomes one of the important development trends of the encoder, so that a magnetoelectric angle sensor chip applied to the encoder is developed, a complex circuit is integrated, the single-circle position of the encoder can be directly output, but the multi-circle position of the encoder cannot be output, and the magnetoelectric angle sensor chip cannot be directly applied to occasions needing to output the multi-circle position of the encoder.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention aims to provide a magnetoelectric angle sensor, an encoder and a motor, which are used for solving the problems that the magnetoelectric angle sensor directly outputting the position of a single ring of the encoder cannot directly output the position of multiple rings of the encoder and has small application occasions, and the magnetoelectric angle sensor can directly output the position of the single ring of the encoder and the position of the multiple rings of the encoder so as to enlarge the application occasions of the magnetoelectric angle sensor.
The present invention provides a magnetoelectric angle sensor, including: the device comprises a magnetic angle sensor, a single-turn sampling unit, a multi-turn sampling unit and a processor; wherein the magnetic angle sensor is configured to generate a two-way differential analog signal by sensing a magnetic field change; the single-turn sampling unit is configured to sample single-turn data based on the two-way differential analog signal; the multi-turn sampling unit is configured to sample multi-turn data based on the two-way differential analog signal; if one circle is counted according to a set period, the multi-circle data comprises data with more than two set periods; the processor is configured to process the single-turn data obtained by sampling to obtain single-turn position information; and processing the multi-turn data obtained based on sampling to obtain multi-turn position information.
In some embodiments, the single-turn sampling unit comprises: the two-path amplification module and the two-path sampling module; one of the two amplifying modules amplifies one of the two differential analog signals, and then performs analog-to-digital conversion through one of the two sampling modules to obtain a first digital signal; the other amplification module in the two paths of amplification modules is used for amplifying the other differential analog signal in the two paths of differential analog signals and then carrying out analog-to-digital conversion processing on the other sampling module in the two paths of sampling modules to obtain a second digital signal; the first digital signal and the second digital signal as the single turn data.
In some embodiments, the processor, performing processing based on the sampled single-turn data to obtain single-turn position information, includes: and the processor performs angle calculation, calibration and interpolation calculation based on the single-turn data to obtain an incremental signal and a three-phase signal as the single-turn position information.
In some embodiments, the multi-turn sampling unit comprises: the device comprises a comparison module, a multi-turn counting module and a storage module; the comparison module is configured to compare sine and cosine analog signals in the two paths of differential analog signals to generate sine and cosine pulse signals; the multi-circle counting module is configured to count the number of cycles of the sine and cosine pulse signals by utilizing edge counting in a mode of counting one circle in one cycle to obtain a counting value; the storage module is configured to store the count value to obtain the multi-turn data.
In some embodiments, the comparison module comprises: a comparator; the memory module includes: a count value register.
In some embodiments, the processor, performing processing based on the sampled multi-turn data to obtain multi-turn position information, includes: and the processor performs angle calculation, calibration and interpolation calculation based on the single-turn data to obtain multi-turn position information.
In some embodiments, further comprising: a communication module; the communication module is configured to transmit the single-turn position information under the condition that the processor processes the single-turn data to obtain the single-turn position information; and processing the multi-turn data in the processor to obtain multi-turn position information and transmitting the multi-turn position information.
In some embodiments, further comprising: a power supply module; the power module includes: the power supply device comprises a first power supply module and a second power supply module; the first power supply module is configured to supply power to a power utilization part in the magnetoelectric angle sensor; the second power supply module is configured to supply power to a power utilization part in the magnetoelectric angle sensor under the condition that the first power supply module is powered down.
In accordance with another aspect of the present invention, there is provided an encoder, including: the magnetoelectric angle sensor described above.
In accordance with the encoder, a further aspect of the present invention provides a motor, comprising: the encoder described above.
Therefore, according to the scheme provided by the invention, the magnetoelectric angle sensor is added with a multi-circle counting function, so that the magnetoelectric angle sensor can directly output the position of a single circle of the encoder and the position of multiple circles of the encoder, and the applicable occasions of the magnetoelectric angle sensor are enlarged.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a magnetoelectric angle sensor according to the present invention;
FIG. 2 is a schematic diagram of a chip architecture of an embodiment of a magnetoelectric angle sensor;
FIG. 3 is a schematic diagram of a chip architecture of an embodiment of the novel magnetoelectric angle sensor;
FIG. 4 is a schematic diagram of a pulse signal according to an embodiment of the pulse signal generated by the comparator.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to an embodiment of the present invention, a magnetoelectric angle sensor is provided. Referring to fig. 1, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The magnetoelectric angle sensor may include: the device comprises a magnetic angle sensor, a single-turn sampling unit, a multi-turn sampling unit and a processor.
Wherein the magnetic angle sensor is configured to generate a two-way differential analog signal by sensing a magnetic field change. Namely, the magnetic angle sensor can sense the change of a magnetic field to generate an analog signal through the rotation of the magnetic steel, and the analog signal can be calculated through an internal MCU (microprogrammed control Unit) to output an angle value.
The single-turn sampling unit is configured to sample single-turn data based on the two-way differential analog signal.
The multi-turn sampling unit is configured to sample multi-turn data based on the two-way differential analog signal. And if one circle is counted according to the set period, the multi-circle data comprises data with more than two set periods.
The processor is configured to process the single-turn data obtained by sampling to obtain single-turn position information. And processing the multi-turn data obtained based on sampling to obtain multi-turn position information.
From this, through at the inside many rings of modules that increase of magnetoelectric angle sensor chip, magnetoelectric angle sensor chip joins in marriage many rings of circuit and MCU's problem because of can't count many rings in the relevant scheme has been solved, when reducing the complexity of encoder circuit design, reduces the encoder size, reduces manufacturing cost, improves the market competitiveness of product, is favorable to compiling the wide application of self-control encoder in higher field product.
In some embodiments, the single-turn sampling unit comprises: two-way amplification modules (such as two-way amplifiers G) and two-way sampling modules (such as two-way ADC sampling modules).
One of the two amplifying modules amplifies one of the two differential analog signals, and then performs analog-to-digital conversion through one of the two sampling modules to obtain a first digital signal.
And the other amplification module in the two paths of amplification modules is used for amplifying the other path of differential analog signal in the two paths of differential analog signals and then carrying out analog-to-digital conversion processing through the other path of sampling module in the two paths of sampling modules to obtain a second digital signal. The first digital signal and the second digital signal as the single turn data.
Specifically, the amplifier G can amplify the source signal, which is beneficial for sampling. The ADC sampling module realizes analog signal digitization so as to facilitate subsequent signal processing.
In some embodiments, the processor, performing processing based on the sampled single-turn data to obtain single-turn position information, includes: the processor performs angle calculation, calibration and interpolation calculation based on the single-turn data to obtain a zero signal (such as a zero signal ABZ) and a three-phase signal (such as a three-phase signal UVM) as the single-turn position information. Wherein ABZ/-A-B-Z is absolute position data.
Specifically, the magnetoelectric angle sensor chips generate two paths of differential analog signals by the magnetic angle sensor sensing the change of a magnetic field, the two paths of differential analog signals pass through an amplifier G, ADC sampling module and then reach a DSP module to perform angle calculation, calibration and interpolation calculation, and finally zero position signals ABZ/-A-B-Z and three-phase signals UVW are output and single-loop position information is output through communication protocols such as SPI.
In some embodiments, the multi-turn sampling unit comprises: a comparison module (such as a comparator), a multi-turn counting module and a storage module (such as a counting value register).
The comparing module is configured to compare sine and cosine analog signals in the two-way differential analog signals to generate sine and cosine pulse signals (such as pulse signals ST and CT). That is, the comparator can process the sine and cosine signals into square wave signals CT and ST.
The multi-circle counting module is configured to count the number of cycles of the sine and cosine pulse signals by using edge counting in a mode of counting one circle in one cycle to obtain a counting value. Namely, the multi-turn counting module can judge the periodicity of CT and ST through edge counting when the motor shaft rotates, and record the number of turns for a long time.
The storage module is configured to store the count value to obtain the multi-turn data.
Specifically, after the multi-turn counting module is added, the magnetic angle sensor generates two-way analog signals sin (namely sine analog signals) and cos (namely cosine analog signals), pulse signals ST (namely sine pulse signals) and CT (namely cosine pulse signals) are generated through the comparator, the pulse signals ST and CT are transmitted to the multi-turn counting module, edge counting is utilized, one cycle is counted for one turn, and the counting value is stored in the counting value register.
In some embodiments, the comparison module comprises: a comparator. The memory module includes: a count value register. That is, the count value register can store the recorded data of a plurality of turns in the register.
In some embodiments, the processor, performing processing based on the sampled multi-turn data to obtain multi-turn position information, includes: and the processor performs angle calculation, calibration and interpolation calculation based on the single-turn data to obtain multi-turn position information. I.e., a DSP module, is a microprocessor that implements digital signal processing techniques. The angle calculation, calibration and interpolation are the internal data processing process of the DSP.
Specifically, the multi-turn counting module counts a turn in one period by utilizing edge counting, the counting value is stored in a counting value register, forward and reverse rotation can be judged through the lead-lag relation of CT and ST in the period, the internal microprocessor DSP module takes out the information and the data of the single turn, and serial port output is realized through communication protocols such as SPI and the like to obtain the position information of the single turn and the multi-turn. The multi-turn function is directly added into the magnetoelectric angle sensor chip, so that the cost of an application layer can be reduced, the complexity of circuit design is reduced, and the size of a product is reduced.
In some embodiments, further comprising: and a communication module. The communication module is configured to transmit the single-turn position information under the condition that the processor processes the single-turn data to obtain the single-turn position information. And processing the multi-turn data in the processor to obtain multi-turn position information and transmitting the multi-turn position information.
Specifically, the communication module such as an SPI interface, SPI, is a communication protocol mode that sends absolute position information of the encoder to the driver communication module.
In some embodiments, further comprising: and a power supply module. The power module includes: the power supply system comprises a first power supply module and a second power supply module, wherein the first power supply module can be a normal power supply module, and the second power supply module can be a battery power supply module.
Wherein the first power supply module is configured to supply power to a power utilization portion in the magnetoelectric angle sensor.
The second power supply module is configured to supply power to a power utilization part in the magnetoelectric angle sensor under the condition that the first power supply module is powered down.
Specifically, the power module comprises normal power supply and battery power supply. When the power supply for normal power supply is powered off, the battery supplies power to the encoder. Because the life-span of encoder is decided to the power consumption of many rings of encoders, after the power failure, the encoder is supplied power by the battery, through count pulse control dormancy and awaken up, realizes low-power consumption, makes the life of encoder longer.
Through a large number of tests, the technical scheme of the invention is adopted, and the magnetoelectric angle sensor is added with a multi-circle counting function, so that the magnetoelectric angle sensor can directly output the position of a single circle of the encoder and the position of multiple circles of the encoder, and the application occasions of the magnetoelectric angle sensor are enlarged.
According to an embodiment of the present invention, there is also provided an encoder corresponding to the magnetoelectric angle sensor. The encoder may include: the magnetoelectric angle sensor described above.
Because in the relevant scheme, the magnetoelectric angle sensor of direct output encoder single circle position has ignored the problem that the encoder need count many circles of positions, can not satisfy high-end application occasion, if want to satisfy the use of occasions such as robot, digit control machine tool, just need use this magnetoelectric angle sensor chip after, outer many circles of parts of joining in marriage and corresponding MCU, the difficult resource waste that causes of exempting from. That is to say, the magnetoelectric angle sensor directly outputting the single-circle position of the encoder needs to be configured with a multi-circle part and an MCU in the occasion of measuring the multi-circle position of the encoder, which is difficult to avoid causing resource waste.
In some embodiments, the invention provides a multi-turn functional solution, which can realize counting of multi-turn positions in a chip and low power consumption.
The scheme of the invention provides a novel magnetoelectric angle sensor chip framework, and on the basis of related schemes, a multi-circle function is added, and the absolute positions of a single circle and multiple circles of an encoder are output, so that the aim of being applied to the field of high-end products is fulfilled.
Specifically, the scheme of the invention provides a novel structure of a magnetoelectric angle sensor chip applied to an encoder, and realizes the absolute position output of a single circle and multiple circles of the chip by adding a multi-circle counting function, thereby effectively improving the control precision of a motor, reducing the size of the encoder and the complexity of a design circuit, and reducing the cost, the complexity and the size of an application layer.
Therefore, according to the scheme of the invention, the multi-loop module is added in the magnetoelectric angle sensor chip, so that the problem that the magnetoelectric angle sensor chip is externally provided with the multi-loop circuit and the MCU due to the fact that the magnetoelectric angle sensor chip cannot count multiple loops in related schemes is solved, the complexity of the design of the encoder circuit is reduced, the size of the encoder is reduced, the production cost is reduced, the market competitiveness of products is improved, and the wide application of the encoder in higher fields is facilitated.
The following describes an exemplary implementation process of the scheme of the present invention with reference to the examples shown in fig. 2 to 4.
Fig. 2 is a schematic diagram of a chip architecture of an embodiment of a magnetoelectric angle sensor. As shown in fig. 2, the magneto-electric angle sensor includes: the device comprises a magnetic angle sensor, an amplifier G (G represents that the multiple of the amplifier is adjustable), an ADC (analog-to-digital conversion) sampling module, a DSP (digital signal processing) module, an ABZ module, a UVW module and an SPI (Serial Peripheral Interface) module. A DSP module comprising: the device comprises an angle calculation module, a calibration module and an interpolation module. A first output end of the magnetic angle sensor is input to a first input end of the DSP module after passing through a path of amplifier G and a path of ADC sampling module. And a second output end of the magnetic angle sensor is input to a second input end of the DSP module after passing through the other path of amplifier G and the other path of ADC sampling module. And the output end of the DSP module is respectively connected to the ABZ module, the UVW module and the SPI module. The process of converting magnetism into electricity is magnetoelectricity.
For the ABZ module, the encoder output signal has three phases ABZ, where the phase AB is the pulse output signal, the phase Z is the number of turns, the phase AB differs by 90 °, and the direction of rotation is determined based on whether a leads B or lags B. For the UVW module, the encoder can also output a UVW signal to represent the position change of the motor, and the UVW signal is mainly used for driving the brushless direct current motor.
In the related scheme, the magnetoelectric angle sensor chip generates two differential analog signals by the magnetic angle sensor sensing the change of a magnetic field, the two differential analog signals pass through an amplifier G, ADC sampling module and then reach a DSP module for angle calculation, calibration and interpolation calculation, and finally outputs a zero position signal ABZ/-A-B-Z, a three-phase signal UVW and single-loop position information through communication protocols such as SPI and the like, as shown in figure 2. Because most high-end application occasions all need the function of many circles of counts, this just makes the many circles of chips of external configuration still need dispose corresponding MCU and handle, and the resource is wasted, increases the cost again. Considering that the multi-circle function is directly added into the magnetoelectric angle sensor chip, the cost of an application layer can be reduced, the complexity of circuit design is reduced, and the size of a product is reduced.
Fig. 3 is a schematic diagram of a chip architecture of an embodiment of the novel magnetoelectric angle sensor. As shown in fig. 3, the novel magnetoelectric angle sensor includes: the magnetic angle sensor comprises a magnetic angle sensor, an amplifier G, ADC (analog-to-digital conversion) sampling module, a DSP module (namely an internal microprocessor DSP module), an ABZ module, an SPI (Serial Peripheral Interface) module, a comparator, a multi-turn counting module, a counting value register and a power supply module. A DSP module comprising: the device comprises an angle calculation module, a calibration module and an interpolation module.
A first output end of the magnetic angle sensor is input to a first input end of the DSP module after passing through a path of amplifier G and a path of ADC sampling module. And a second output end of the magnetic angle sensor is input to a second input end of the DSP module after passing through the other path of amplifier G and the other path of ADC sampling module. And the magnetic angle sensor is also connected to a third input end of the DSP module after passing through the comparator, the multi-turn counting module and the counting value register. And the output end of the DSP module is respectively connected to the ABZ module and the SPI module.
FIG. 4 is a schematic diagram of a pulse signal according to an embodiment of the pulse signal generated by the comparator.
The scheme of the invention provides a novel chip architecture of a magnetoelectric angle sensor, which is composed of a magnetic angle sensor, an internal microprocessor DSP, a multi-turn counting module, a power supply module and an output part, and is shown in figure 3. After a multi-turn counting module is added, a magnetic angle sensor generates two paths of analog signals sin (namely sine analog signals) and cos (namely cosine analog signals), and a comparator generates pulse signals ST (namely sine pulse signals) and CT (namely cosine pulse signals), namely the comparator outputs square waves CT and ST with the same period as the analog signals; and then, the counting module counts one circle in one period by utilizing edge counting, the counting value is stored in a counting value register, forward and reverse rotation (such as forward and reverse rotation directions according to phase difference) can be judged through the lead-lag relation of CT and ST shown in figure 4 in the period, the internal microprocessor DSP module takes out the information and the data of the single circle, and serial port output is realized through communication protocols such as SPI (serial peripheral interface) to obtain the position information of the single circle and the multiple circles.
In the scheme of the invention, the magnetic angle sensor can sense the change of a magnetic field to generate an analog signal through the rotation of the magnetic steel, and the analog signal can output an angle value through the operation of an internal MCU.
In the scheme of the invention, the amplifier G can amplify the source signal and is beneficial to sampling.
In the scheme of the invention, the ADC sampling module realizes analog signal digitization so as to facilitate subsequent signal processing.
In the aspect of the present invention, the comparator may process the sine and cosine signals into square signals CT and ST.
In the scheme of the invention, the multi-turn counting module can judge the number of the periods of CT and ST through edge counting when the motor shaft rotates, and record the number of the turns for a long time.
In the scheme of the invention, the counting value register can store the recorded multi-turn data in the register.
In the scheme of the invention, the power supply module comprises normal power supply and battery power supply. When the power supply for normal power supply is powered off, the battery supplies power to the encoder.
In the solution of the present invention, the DSP module is a microprocessor for implementing a digital signal processing technique.
In the scheme of the invention, the angle calculation, calibration and interpolation are the internal data processing process of the DSP.
In the scheme of the invention, the ABZ/-A-B-Z is absolute position data.
In the scheme of the invention, the SPI is a communication protocol mode and sends absolute position information of the encoder to the driver communication module.
Because the life-span of encoder is decided to the power consumption of many rings of encoders, after the power failure, the encoder is supplied power by the battery, through count pulse control dormancy and awaken up, realizes low-power consumption. For example: when the rotating speed of the motor is 6000r/min, one awakening period is 10ms, namely 1ms is in an awakening state, and 9ms is in a sleeping state, so that the power consumption of the encoder is effectively reduced, and the service life of the encoder is longer.
Since the processes and functions implemented by the encoder of the present embodiment substantially correspond to the embodiments, principles, and examples of the apparatus shown in fig. 1, reference may be made to the related descriptions in the foregoing embodiments for details which are not described in the present embodiment, and thus no further description is given here.
Through a large number of tests, the technical scheme of the invention is adopted, and the magnetoelectric angle sensor is added with a multi-circle counting function to output the absolute positions of a single circle and multiple circles of the encoder, thereby achieving the purpose of being applied to the field of high-end products.
According to an embodiment of the present invention, there is also provided a motor corresponding to the encoder. The motor may include: the encoder described above.
Since the processing and functions implemented by the motor of this embodiment substantially correspond to the embodiments, principles and examples of the encoder, reference may be made to the related descriptions in the foregoing embodiments without being detailed in the description of this embodiment, which is not described herein.
Through a large number of tests, the technical scheme of the embodiment is adopted, and the single-circle and multi-circle absolute position output of the chip is realized by adding the multi-circle counting function, so that the control precision of the motor is effectively improved, and the size of the encoder and the complexity of a designed circuit are reduced.
In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A magnetoelectric angle sensor characterized by comprising: the device comprises a magnetic angle sensor, a single-turn sampling unit, a multi-turn sampling unit and a processor; wherein,
the magnetic angle sensor is configured to generate a two-way differential analog signal by sensing a magnetic field change;
the single-turn sampling unit is configured to sample single-turn data based on the two-way differential analog signal;
the multi-turn sampling unit is configured to sample multi-turn data based on the two-way differential analog signal; if one circle is counted according to a set period, the multi-circle data comprises data with more than two set periods;
the processor is configured to process the single-turn data obtained by sampling to obtain single-turn position information; and processing the multi-turn data obtained based on sampling to obtain multi-turn position information.
2. The magnetoelectric angle sensor according to claim 1, wherein the single-turn sampling unit comprises: the two-path amplification module and the two-path sampling module; wherein,
one of the two amplifying modules amplifies one of the two differential analog signals and then performs analog-to-digital conversion through one of the two sampling modules to obtain a first digital signal;
the other amplification module in the two paths of amplification modules is used for amplifying the other differential analog signal in the two paths of differential analog signals and then carrying out analog-to-digital conversion processing on the other sampling module in the two paths of sampling modules to obtain a second digital signal; the first digital signal and the second digital signal as the single turn data.
3. The magnetoelectric angle sensor according to claim 1 or 2, wherein the processor processes the single-turn data obtained based on sampling to obtain single-turn position information, and includes:
and the processor performs angle calculation, calibration and interpolation calculation based on the single-turn data to obtain an incremental signal and a three-phase signal as the single-turn position information.
4. The magnetoelectric angle sensor according to claim 1, characterized in that the multi-turn sampling unit comprises: the device comprises a comparison module, a multi-turn counting module and a storage module; wherein,
the comparison module is configured to compare sine and cosine analog signals in the two paths of differential analog signals to generate sine and cosine pulse signals;
the multi-circle counting module is configured to count the number of cycles of the sine and cosine pulse signals by utilizing edge counting in a mode of counting one circle in one cycle to obtain a counting value;
the storage module is configured to store the count value to obtain the multi-turn data.
5. The magnetoelectric angle sensor according to claim 4, characterized in that the comparison module comprises: a comparator; the memory module includes: a count value register.
6. The magnetoelectric angle sensor according to any one of claims 1, 4, and 5, wherein the processor processes the multi-turn data obtained based on sampling to obtain multi-turn position information, including:
and the processor performs angle calculation, calibration and interpolation calculation based on the single-turn data to obtain multi-turn position information.
7. A magnetoelectric angle sensor according to any one of claims 1, 2, 4, 5, characterized by further comprising: a communication module;
the communication module is configured to transmit the single-turn position information under the condition that the processor processes the single-turn data to obtain the single-turn position information; and processing the multi-turn data in the processor to obtain multi-turn position information and transmitting the multi-turn position information.
8. A magnetoelectric angle sensor according to any one of claims 1, 2, 4, 5, characterized by further comprising: a power supply module; the power module includes: the power supply device comprises a first power supply module and a second power supply module;
the first power supply module is configured to supply power to a power utilization part in the magnetoelectric angle sensor;
the second power supply module is configured to supply power to a power utilization part in the magnetoelectric angle sensor under the condition that the first power supply module is powered down.
9. An encoder, comprising: the magnetoelectric angle sensor according to any one of claims 1 to 8.
10. An electric machine, comprising: an encoder according to claim 9.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199286A (en) * | 2021-10-26 | 2022-03-18 | 苏州申恩电子科技有限公司 | Incremental electromagnetic encoder |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101101224A (en) * | 2006-07-07 | 2008-01-09 | 中国科学院长春光学精密机械与物理研究所 | A semi-circle absolute type polarization angle sensor |
| CN104135284A (en) * | 2014-07-30 | 2014-11-05 | 佛山科学技术学院 | Phase discrimination method and device as well as phase locking method and phase-locked loop |
| DE102014102564A1 (en) * | 2014-02-27 | 2015-08-27 | Fritz Kübler GmbH Zähl- und Sensortechnik | Absolute single-turn rotary encoder with selectable multiturn function |
| CN106152932A (en) * | 2015-03-31 | 2016-11-23 | 西门子公司 | A kind of rotating angle measurement apparatus and measuring method |
| CN207268624U (en) * | 2017-08-31 | 2018-04-24 | 山西泰润达科技有限公司 | A kind of multi-turn magnetic absolute angle sensor |
| CN108204825A (en) * | 2016-12-19 | 2018-06-26 | Tdk株式会社 | The correcting device and angular transducer of angular transducer |
| CN109238177A (en) * | 2018-10-16 | 2019-01-18 | 大连探索者科技有限公司 | A kind of combined type angular transducer with measurement multi-turn angle function |
| CN109708568A (en) * | 2018-12-04 | 2019-05-03 | 天津津航技术物理研究所 | A kind of signal processing apparatus for hall device angle detection system |
-
2020
- 2020-11-19 CN CN202011305220.7A patent/CN112556732A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101101224A (en) * | 2006-07-07 | 2008-01-09 | 中国科学院长春光学精密机械与物理研究所 | A semi-circle absolute type polarization angle sensor |
| DE102014102564A1 (en) * | 2014-02-27 | 2015-08-27 | Fritz Kübler GmbH Zähl- und Sensortechnik | Absolute single-turn rotary encoder with selectable multiturn function |
| CN104135284A (en) * | 2014-07-30 | 2014-11-05 | 佛山科学技术学院 | Phase discrimination method and device as well as phase locking method and phase-locked loop |
| CN106152932A (en) * | 2015-03-31 | 2016-11-23 | 西门子公司 | A kind of rotating angle measurement apparatus and measuring method |
| CN108204825A (en) * | 2016-12-19 | 2018-06-26 | Tdk株式会社 | The correcting device and angular transducer of angular transducer |
| CN207268624U (en) * | 2017-08-31 | 2018-04-24 | 山西泰润达科技有限公司 | A kind of multi-turn magnetic absolute angle sensor |
| CN109238177A (en) * | 2018-10-16 | 2019-01-18 | 大连探索者科技有限公司 | A kind of combined type angular transducer with measurement multi-turn angle function |
| CN109708568A (en) * | 2018-12-04 | 2019-05-03 | 天津津航技术物理研究所 | A kind of signal processing apparatus for hall device angle detection system |
Non-Patent Citations (1)
| Title |
|---|
| 张从鹏 等: "基于STM32的高精度多圈绝对角度传感器", 《仪表技术与传感器》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199286A (en) * | 2021-10-26 | 2022-03-18 | 苏州申恩电子科技有限公司 | Incremental electromagnetic encoder |
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