CN202394685U - Rotary transformer and motion encoder using same - Google Patents
Rotary transformer and motion encoder using same Download PDFInfo
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- CN202394685U CN202394685U CN2011203736061U CN201120373606U CN202394685U CN 202394685 U CN202394685 U CN 202394685U CN 2011203736061 U CN2011203736061 U CN 2011203736061U CN 201120373606 U CN201120373606 U CN 201120373606U CN 202394685 U CN202394685 U CN 202394685U
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- hall element
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Abstract
The utility model relates to a rotary transformer and a motion encoder using the same. An annular soft magnetic core is arranged on a printed circuit board of a sensor stator; at least one linear hall element, a switch hall element and at least one full-pole-pitch winding element are arranged on the inner wall of the annular soft magnetic core; the magnetosensitive surface of each linear or switch hall element and the magnetic field sensitive surface of each winding element are respectively aligned with the magnetic pole surface of a permanent magnet magnetic ring; the linear and switch hall elements are used for measuring the rotation position, and the winding element is used for measuring the rotation speed; and a position signal and a speed signal are in a same phase. The motion encoder has a higher position precision than the conventional electromagnetic induction type rotation transformer, so that amplitude errors and phase errors are eliminated, and function errors are very low; the rotary transformer is not sensitive to the mounting deviation and high in consistency and has a simple structure and a simple manufacturing process; and the motion encoder with various output forms can be formed.
Description
Technical field
The utility model relates to a kind of based on Hall and the resolver of electromotive force detection and the motion encoder of using this transformer.
Background technology
Traditional resolver (resolver) is a kind of based on the take measurement of an angle rotating position transducer of usefulness of electromagnetic principle, is used for measuring the rotating shaft angular travel of rotating object, is made up of sensor stator and rotor sensor.The Hall resolver is a kind of position transducer that can accomplish similar functions.Sinusoidal, cosine function relation that their output voltage amplitude becomes with the rotor sensor corner, or keep a certain proportionate relationship, or linear with corner in certain angle range.
At notification number is in the Chinese patent of CN2565123Y; A kind of Hall resolver is disclosed; Printed board comprising linear hall element, permanent magnet magnetic ring, hollow shaft rotor sensor, sensor stator casing, rear chassis, sensor stator core and Hall integrated circuit; Four linear hall elements are installed on the sensor stator core, the 90 ° of electrical degrees that stagger each other, and adopt specific many permanent magnet magnetic rings to the utmost point; Two ball bearings that support sensor stator are arranged in the middle of the rotor sensor, and the sensor stator front end has the spring leaf that connects usefulness.Existing problems are in this scheme: 1, need to adopt specific many permanent magnet magnetic rings to the utmost point, and high to the magnetic pole uniformity requirement, can not be general to the motor of different poles logarithm; 2, in a circle scope, be difficult to accomplish definite unique zero-bit, the detection of inconvenient absolute angular position; 3, monolithic construction and complex process are difficult to realize miniaturization.
At notification number is in the Chinese patent of CN200972824Y; A kind of Hall resolver that improves the problems referred to above is disclosed; Comprising the printed circuit board of linear hall element, permanent magnet magnetic ring, hollow shaft, sensor stator casing, sensor stator core and connection Hall element, its permanent magnet magnetic ring is fixed on the hollow shaft; Its special character is: the sensor stator core is annular, 90 ° of space angles at least two installing holes that distributing at interval on the sensor stator core, and linear hall element is fixed in the installing hole, so that limit the locus of linear hall element.Yet the position in the installing hole of linear hall element on the sensor stator core can be because of the reasons such as overall dimension of assemblage gap, Hall element, 6 degree of freedom locations of the up, down, left, right, before and after deviation in installing hole.Again because permanent magnet magnetic ring is fixed on the hollow shaft location deviation and perpendicularity deviation etc., amplitude error, phase error, the function error that all can cause resolver to export.In addition, the quality of permanent magnet magnetic ring, installation also have very big relation to error, and traditional Hall resolver error is big and consistency error is very poor.
Have radial position deviation 0.1mm if install, establish the external diameter 12mm of permanent magnet, the relative position deviation of the relative girth of 0.1mm is so: 0.1/ (π * 12)=0.265%.This deviation and 1 °/360 °=0.278% suitable explains in this Hall resolver that single position deviation will produce the error of 1 ° of degree.So the angular error of the Hall rotary transformer technology in the aforementioned techniques scheme can not be superior to 1 °.Again for example, permanent magnet magnetic ring is fixed on the hollow shaft, has 0.5 ° of perpendicularity deviation, and just being equivalent to the radial position deviation is 12sin0.5 °=0.1mm, also can produce the error of 1 ° of degree.Permanent magnet magnetic ring produces 3 d-space field, and the effect that linear hall element will receive tangential magnetic field component and radial field component produces voltage output.
At notification number is in the Chinese patent of CN200972824Y; Use four linear hall elements; The output voltage of two linear hall elements of 180 ° of layouts is subtracted each other, attempt that compensation is fixed, the rotor sensor assembling is eccentric, but owing to can't compensate simultaneously radially and the tangential magnetic field component; So can not play good compensation effect, and think it is the magnetic pole homogeneity question usually by mistake.
At application number is the Hall resolver in the Chinese patent of ZL200820207106.9, has increased an annular soft magnet core, with 3 d-space field, is constrained to two-dimensional space magnetic field, has improved the deviation that assembling causes greatly.But existing Hall resolver needs the linear hall element of at least 2 90 ° of quadratures; Or the linear hall element of 3 120 ° of distributions; The consistency of distribution precision and linear hall element all can directly cause the amplitude error and the phase error of Hall resolver; Cause the position probing deviation, and a plurality of linear hall element cost is higher.
Therefore, the position deviation of existing Hall resolver can only reach about 0.5 °-1 °, and cost performance is also not high enough.In addition, though the Hall switch angle-position encoder is existing mature technology, yet resolution is generally less than 100 lines, and precision is lower.Existing Hall encoder can't directly detect the speed of rotation, must increase Ω=d θ/dt or corresponding processing links again.
The utility model content
The technical problem that the utility model will solve is, to the above-mentioned defective of prior art, a kind of resolver and the motion encoder of using this transformer is provided.
The utility model solves the technical scheme that its technical problem adopted: construct a kind of resolver; Comprise sensor stator and the rotor sensor of being located in the said sensor stator; Said sensor stator comprises the bracing frame of annular; Said ring holder comprises the outer ring and is nested in the inner ring in the said outer ring; Leave certain interval between said outer ring and the inner ring; Be installed with the soft magnet core of annular on the inwall of said outer ring, the outer wall of said inner ring is provided with the element of winding of at least one linear hall element, a switch Hall element and a full pole span, and said linear hall element, switch Hall element and the element of winding all are close to the inwall of said soft magnet core; Also comprise printed circuit board, the pin of said linear hall element, switch Hall element and the element of winding is welded on the said printed circuit board; In said linear hall element and said switch Hall element, it is 90 ° that a said linear hall element and said switch Hall element electrical degree are spatially arranged; And the magnetic sensitive area of any said linear hall element, switch Hall element and the element of winding is all relative with the pole surface of said rotor sensor.
The described resolver of the utility model, wherein, said rotor sensor comprises the rotor sensor axle and is fixed on the permanent magnet magnetic ring on the said rotor sensor axle outer circumference surface.
The described resolver of the utility model, wherein, said permanent magnet magnetic ring is processed by plastic bonding NdFeB material or Ferrite Material.
The described resolver of the utility model, wherein, the thickness of said soft magnet core is 1-5mm.
Another technical scheme that its technical problem that solves the utility model adopts is: construct a kind of motion encoder, comprise corner translation circuit and velocity transformation circuit, also comprise resolver as described above;
Said corner translation circuit comprises the A/D modular converter that is used for the sinusoidal wave analog output voltage that the linear hall element of said resolver is exported is converted to digital quantity
Also comprise digital quantity based on the output of said A/D modular converter, sign function that said switch Hall element provides and the sign function ± Sig|V of the said element of winding
e| calculate the position determination module that acquisition has the digital quantity position signalling of uniqueness;
Said velocity transformation circuit comprises traffic filter or the A/D modular converter that is used for the ideal output of the said element of winding is converted to the velocity output signal of analog quantity or digital quantity.
The described motion encoder of the utility model, wherein, digital signal DSP or single-chip microprocessor MCU are confirmed to comprise in said position.
The described motion encoder of the utility model, wherein said position determination module comprises on-site programmable gate array FPGA or application-specific integrated circuit ASIC.
Implement the resolver and the motion encoder of the utility model; Have following beneficial effect: the utility model is only used a linear hall element and a switch Hall element; Just can guarantee the uniqueness of 360 ° of position probing; Overcome because amplitude error and the phase error of using a plurality of detecting elements to cause from principle, and linear hall element and switch Hall component space distribution position deviation can not influence the sensor precision.In addition,,, suppressed stray field, improved function error, improved the sensor precision so the magnetic line of force also just vertically passes linear hall element because linear hall element is close to the internal ring wall of annular soft magnet core.
Description of drawings
To combine accompanying drawing and embodiment that the utility model is described further below, in the accompanying drawing:
Fig. 1 is the structural representation of the utility model resolver preferred embodiment;
Fig. 2 is the profile of the utility model resolver preferred embodiment;
Fig. 3 is the output waveform figure of Hall element in the utility model resolver preferred embodiment;
Fig. 4 is the output waveform figure of the element of winding in the utility model resolver preferred embodiment;
Fig. 5 is two desirable output waveform figures that are 180 ° linear hall element in the utility model resolver preferred embodiment;
Fig. 6 is the output waveform figure after two desirable outputs of Fig. 5 are subtracted each other in the utility model resolver preferred embodiment;
Fig. 7 is the schematic diagram of the utility model motion encoder preferred embodiment;
Fig. 8 is that the corner of motion encoder in the utility model motion encoder preferred embodiment is exported digital spirogram;
Fig. 9 is the corner delta pulse numeral spirogram of motion encoder in the utility model motion encoder preferred embodiment;
Figure 10 is the analog-and digital-amount rotating speed output map of motion encoder in the utility model motion encoder preferred embodiment;
Figure 11 is the circuit diagram when motion encoder adopts hardware module in the utility model motion encoder preferred embodiment;
Figure 12 is that the corner of Figure 11 in the utility model motion encoder preferred embodiment is exported digital spirogram;
Figure 13 is the circuit diagram when adopting hardware module and software module simultaneously in the utility model motion encoder preferred embodiment.
Embodiment
As shown in Figure 1, simultaneously referring to Fig. 2.In the preferred embodiment of the utility model, this resolver comprises sensor stator 100 and the rotor sensor of being located in the sensor stator 100.Wherein, sensor stator 100 comprises ring holder, and this ring holder comprises outer ring 101 and is nested in the inner ring 102 in the outer ring, and leaves certain interval between outer ring 101 and the inner ring 102.Outer ring 101 can be made of plastic with inner ring 102.Be installed with the soft magnet core 300 of annular on the inwall of outer ring 101, the thickness of this soft magnet core 300 is 1-5mm, repeatedly is pressed into by electrical pure iron or multi-disc dynamo steel sheet; This soft magnet core 300 can retrain air-gap field, and the magnetic line of force that the rotor sensor permanent magnet magnetic ring is produced vertically gets into soft magnet core 300.The outer wall of inner ring 102 is provided with the element of winding 700 of at least one linear hall element 400, a switch Hall element 500 and a full pole span; And linear hall element 400, switch Hall element 500 and the element of winding 700 all are close to the inwall of soft magnet core 300; So that the magnetic line of force vertically passes linear hall element 400; Thereby the inhibition stray field is improved function error, has improved the sensor precision.It should be noted that; As can be seen from Figure 1; Linear hall element 400, switch Hall element 500 and the element of winding 700 are except the inwall of being close to soft magnet core 300 is installed; Also be close to, that is to say that the thickness of soft magnet core 300 and the thickness sum of linear hall element 400 or switch Hall element 500 equal the distance between outer ring 101 and the inner ring 102 with the outer wall of inner ring 102.
Also comprise printed circuit board 600, the pin of above-mentioned linear hall element 400, switch Hall element 500 and the element of winding 700 all is welded on the printed circuit board 600.And in linear hall element 400 and switch Hall element 500, it is 90 ° that a linear hall element 400 and a switch Hall element 500 electrical degree are spatially arranged, wherein, and electrical degree=number of pole-pairs * mechanical angle.And the magnetic sensitive area of any linear hall element 400, switch Hall element 500 and the element of winding 700 is all relative with the pole surface of rotor sensor; So that when motion, the responsive magnetic field of permanent magnet of Hall element position, the element of winding produce the responsive movement velocity of back electromotive force.Further, rotor sensor comprises rotor sensor axle 200 and is fixed on the permanent magnet magnetic ring 800 on rotor sensor axle 200 outer circumference surfaces that wherein, institute's permanent magnet magnetic ring 800 can be processed by plastic bonding NdFeB material or Ferrite Material.In addition, according to the amplitude requirement to air-gap field of the difference of magnet ring material and Hall element, the air gap between sensor stator 100 and rotor sensor is 1-15mm.
Like Fig. 3 and shown in Figure 4; The utility model is only used a linear hall element 400 and a switch Hall element 500; Just can guarantee the uniqueness of 360 ° of position probing, overcome traditional resolver because amplitude error and the phase error of using a plurality of detecting elements to cause from principle.Prior characteristics are that the position deviation of linear hall element 400 and switch Hall element 500 spatial distributions can not influence transducer and get accuracy of detection.And because the magnet accumulating cap of soft magnet core 300; Can retrain air-gap field, the magnetic line of force that rotor sensor permanent magnet magnetic ring 800 is produced vertically gets into soft magnet core 300, again because linear hall element 400 is close to the internal ring wall of soft magnet core 300; So the magnetic line of force also just vertically passes linear hall element 400; Thereby suppressed stray field, improved function error, improved the sensor precision.The resolver of the utility model does not exist amplitude error and phase error, so accuracy of detection is superior to 0.05 °～0.5 °.
Further, define the magnetic pole logarithm P=N of above-mentioned permanent magnet magnetic ring 800, the number of linear hall element 400 is more than or equal to 1, and the number of switch Hall element 500 is 1; Then:
The ideal of linear hall element 400 is output as V
h=V
0+ Vsin N θ, the ideal of switch Hall element 500 is output as V
k=± Sig|sinN (θ+90 °) |, the ideal of the element of winding 700 is output as V
e=Ω K sinN θ, and the sign function of the element of winding 700 is ± Sig|V
e|; Wherein, N is the natural number more than or equal to 1, and Ω is the rotating speed of permanent magnet magnetic ring 800.So, can confirm in the N360 ° of scope uniqueness of position and rotating speed through this tittle.
As the magnetic pole logarithm P=1 of permanent magnet magnetic ring 800, and the number of linear hall element 400 and switch Hall element 500 is when being 1, and the ideal of linear hall element 400 is output as V
h=V
0+ Vsin θ, the ideal of switch Hall element 500 is output as V
k=± Sig|sin (θ+90 °) |, the ideal of the element of winding 700 is output as V
e=Ω K sin θ, and the sign function of the element of winding 700 is ± Sig|V
e|; Wherein, Ω is the rotating speed of permanent magnet magnetic ring.Owing to only use a linear hall element 400, therefore on principle, do not have issuable amplitude error of a plurality of detecting elements and phase error, thereby constituted absolute position transducer and speed probe.Understandable, when P=2, can know that the spatial distribution angle between linear hall element 400 and the switch Hall element 500 is 45 ° by electrical degree=number of pole-pairs * mechanical angle; When P=4, the spatial distribution angle between linear hall element 400 and the switch Hall element 500 is 22.5 °, by that analogy.
As shown in Figure 5, as the magnetic pole logarithm P=N of permanent magnet magnetic ring 800, the number of above-mentioned linear hall element 400 is 2, and two linear hall elements 400 are 180 ° when distributing on the outer wall of inner ring 102, and the ideal output of two linear hall elements 400 is respectively V
H1=V
0+ Vsin N θ and V
H2=V
0-Vsin N θ.Therefore, V
H1-V
H2=2VsinN θ (as shown in Figure 6).Can confirm in the N360 ° of scope through this tittle; The uniqueness of position and rotating speed; Owing to only use a pair of linear hall element that 180 ° of mechanical angles distribute that is; Therefore on principle, there are not issuable amplitude error of a plurality of detecting elements and phase error, thereby can constitute N section absolute position transducer and speed probe.
As shown in Figure 7, in another embodiment of the utility model, a kind of motion encoder comprises corner translation circuit and velocity transformation circuit, also comprises resolver as described above.Wherein, the corner translation circuit comprises the A/D modular converter that is used for the sinusoidal wave analog output voltage that the linear hall element 400 of resolver is exported is converted to digital quantity
Also comprise digital quantity based on the output of said A/D modular converter, sign function that the switch Hall element provides and the sign function ± Sig|V of the element of winding
e| calculate the position determination module that acquisition has the digital quantity position signalling of uniqueness;
The velocity transformation circuit comprises traffic filter or the A/D modular converter that is used for the ideal output of the element of winding 700 is converted to the velocity output signal of analog quantity or digital quantity.Principle is:
A/D modular converter in the corner translation circuit converts the sinusoidal wave dense output voltage of linear hall element 400 outputs to 16 digital quantity; The sign function that provides through switch Hall element 500 is again distinguished sine wave and is the ambiguity in cycle by 90 °, utilizes the sign function ± Sig|V of the element of winding 700 of full pole span then
e| confirm the direction of corner and speed, tabling look-up and monodrome obtains the digital quantity position signalling of uniqueness in handling through the position determination module computing at last.Magnetic pole logarithm P=1 with permanent magnet magnetic ring 800 is an example, can detect 360 ° mechanical corner, so be absolute value Hall rotary encoder and Hall angle-position encoder at this moment.Shown in Figure 8 is 16 absolute position encoder output signals, as shown in Figure 9, the ideal output V of the element of winding 700 of the full pole span of velocity transformation circuit utilization
e=Ω K sinN θ converts digital quantity to through signal filtering or A/D, promptly obtains the velocity output signal Ω of analog quantity or digital quantity.
In another specific embodiment of the utility model, above-mentioned position determination module comprises digital signal DSP or single-chip microprocessor MCU, also can adopt on-site programmable gate array FPGA or application-specific integrated circuit ASIC.
If adopt the software module computing, tabling look-up and monodrome obtains the digital quantity position signalling of uniqueness in handling, then can digital quantity position signalling as shown in Figure 8 be transformed to incremental counter encoder output shown in figure 10, wherein U
zBe the Z pulse signal, U
a, U
bBe two phase delta pulse signals.
If adopt the hardware module computing; For example adopt 10 A/D translation circuits and one 12 s' EPROM; Then the output Vh=V0+Vsin θ of linear hall element 400 delivers to 10 A/D translation circuit analog input ends after filtering; 10 position digital signal D0～D9 after the conversion sequentially are connected to A0～A9 address input end of 12 EPROM, like Figure 11 and shown in Figure 12; Switch Hall element Vk=± Sig|sinN (θ+90 °) | the sign function signal; Be connected to the A10 address end of 12 EPROM; The element of winding 700 output Ve=Ω Ksin θ of full pole span, sign function is ± Sig|Ve| to be connected to the A11 address end of 12 EPROM; Produce the position of the linear change of 10 bit resolutions with the high precision position generating means; The output Vh of linear hall element 400 is transformed into 10 with it corresponding position digital signal D (D0～D9); (D0～D9), assignment is given A0～A9 address space of 12 EPROM with 10 position digital signal D; Confirm the phase place of Vh together with the level of A10 address end; Because the output of A/D translation circuit links to each other with EPROM output is corresponding; This just has been transformed into the sawtooth waveforms digital output signal that changes with position linearity with Vh, the level of A11 address end be used for confirming displacement and speed to.Shown in figure 13, also can adopt DSP, MCU, FPGA, ASIC to constitute the motion encoder of the utility model jointly.
Above embodiment only is the technical conceive and the characteristics of explanation the utility model, and its purpose is to let the personage who is familiar with this technology can understand content of the utility model and enforcement in view of the above, can not limit the protection range of the utility model.All equalizations of being done with the utility model claim scope change and modify, and all should belong to the covering scope of the utility model claim.
Claims (7)
1. resolver; It is characterized in that; Comprise sensor stator (100) and be located at the rotor sensor in the said sensor stator (100); Said sensor stator (100) comprises the bracing frame of annular; Said ring holder comprises outer ring (101) and is nested in the inner ring (102) in the said outer ring (101), leaves certain interval between said outer ring (101) and the inner ring (102), is installed with the soft magnet core (300) of annular on the inwall of said outer ring (101); The outer wall of said inner ring (102) is provided with the element of winding (700) of at least one linear hall element (400), a switch Hall element (500) and a full pole span, and said linear hall element (400), switch Hall element (500) and the element of winding (700) all are close to the inwall of said soft magnet core (300); Also comprise printed circuit board (600), the pin of said linear hall element (400), switch Hall element (500) and the element of winding (700) is welded on the said printed circuit board (600); In said linear hall element (400) and said switch Hall element (500), it is 90 ° that a said linear hall element (400) and a said switch Hall element (500) electrical degree are spatially arranged; And the magnetic sensitive area of any said linear hall element (400), switch Hall element (500) and the element of winding (700) is all relative with the pole surface of said rotor sensor.
2. resolver according to claim 1 is characterized in that, said rotor sensor comprises rotor sensor axle (200) and is fixed on the permanent magnet magnetic ring (800) on said rotor sensor axle (200) outer circumference surface.
3. resolver according to claim 2 is characterized in that, said permanent magnet magnetic ring (800) is processed by plastic bonding NdFeB material or Ferrite Material.
4. resolver according to claim 1 is characterized in that, the thickness of said soft magnet core (300) is 1-5mm.
5. a motion encoder is characterized in that, comprises corner translation circuit and velocity transformation circuit, also comprises each described resolver like claim 1-4;
Said corner translation circuit comprises the A/D modular converter that is used for the sinusoidal wave analog output voltage that the linear hall element (400) of said resolver is exported is converted to digital quantity; Also comprise digital quantity based on the output of said A/D modular converter, sign function that said switch Hall element (500) provides and the sign function ± Sig|V of the said element of winding (700)
e| calculate the position determination module that acquisition has the digital quantity position signalling of uniqueness;
Said velocity transformation circuit comprises traffic filter or the A/D modular converter that is used for the ideal output of the said element of winding (700) is converted to the velocity output signal of analog quantity or digital quantity.
6. motion encoder according to claim 5 is characterized in that said position determination module comprises digital signal DSP or single-chip microprocessor MCU.
7. motion encoder according to claim 5 is characterized in that said position determination module comprises on-site programmable gate array FPGA or application-specific integrated circuit ASIC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203736061U CN202394685U (en) | 2011-09-27 | 2011-09-27 | Rotary transformer and motion encoder using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203736061U CN202394685U (en) | 2011-09-27 | 2011-09-27 | Rotary transformer and motion encoder using same |
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| Publication Number | Publication Date |
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| CN202394685U true CN202394685U (en) | 2012-08-22 |
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| CN2011203736061U Withdrawn - After Issue CN202394685U (en) | 2011-09-27 | 2011-09-27 | Rotary transformer and motion encoder using same |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103222020B (en) * | 2011-09-27 | 2015-12-09 | 浙江博望科技发展有限公司 | A kind of resolver |
| CN106208539A (en) * | 2016-08-29 | 2016-12-07 | 华中科技大学 | A kind of magneto-electric encoder |
| CN107532530A (en) * | 2015-02-24 | 2018-01-02 | 法国大陆汽车公司 | Method and apparatus for handling the signal as caused by the turn-sensitive device of rolling target |
| CN108120455A (en) * | 2016-11-28 | 2018-06-05 | 姜国超 | Encoder based on the digital analogue signal combination that Hall sensor generates |
| CN113098205A (en) * | 2021-03-16 | 2021-07-09 | 珠海格力电器股份有限公司 | Rotary transformer and new energy automobile motor |
-
2011
- 2011-09-27 CN CN2011203736061U patent/CN202394685U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103222020B (en) * | 2011-09-27 | 2015-12-09 | 浙江博望科技发展有限公司 | A kind of resolver |
| CN107532530A (en) * | 2015-02-24 | 2018-01-02 | 法国大陆汽车公司 | Method and apparatus for handling the signal as caused by the turn-sensitive device of rolling target |
| CN107532530B (en) * | 2015-02-24 | 2019-08-02 | 法国大陆汽车公司 | Method and apparatus for handling the signal as caused by the rotation sensor of rolling target |
| US11054435B2 (en) | 2015-02-24 | 2021-07-06 | Continental Automotiive France | Method and device for processing a signal produced by a sensor for detecting the rotation of a rotating target |
| CN106208539A (en) * | 2016-08-29 | 2016-12-07 | 华中科技大学 | A kind of magneto-electric encoder |
| CN106208539B (en) * | 2016-08-29 | 2018-10-16 | 华中科技大学 | A kind of magneto-electric encoder |
| CN108120455A (en) * | 2016-11-28 | 2018-06-05 | 姜国超 | Encoder based on the digital analogue signal combination that Hall sensor generates |
| CN113098205A (en) * | 2021-03-16 | 2021-07-09 | 珠海格力电器股份有限公司 | Rotary transformer and new energy automobile motor |
| CN113098205B (en) * | 2021-03-16 | 2022-04-26 | 珠海格力电器股份有限公司 | Rotary transformer and new energy automobile motor |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120822 Effective date of abandoning: 20151209 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |