CN112945288B - Full-angle measuring device and method for rotary transformer - Google Patents
Full-angle measuring device and method for rotary transformer Download PDFInfo
- Publication number
- CN112945288B CN112945288B CN202110070702.7A CN202110070702A CN112945288B CN 112945288 B CN112945288 B CN 112945288B CN 202110070702 A CN202110070702 A CN 202110070702A CN 112945288 B CN112945288 B CN 112945288B
- Authority
- CN
- China
- Prior art keywords
- theta
- signal
- sine
- region
- angle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention discloses a device and a method for measuring the full angle of a rotary transformer, which relate to the technical field of servo control. Positioning four quadrants of ASin theta and Acos theta symbols, and dividing eight regions according to the absolute value ratio to obtain a region where theta is located; and carrying out normalization processing on the value, namely | Sinthetaj/ | Cos theta | belongs to [0,1] or | Cos theta |/| Sinthetaji belongs to [0,1], and constructing according to a construction function of the translation angle to obtain the translation angle beta. And performing quadrant and subregion judgment according to the rotary variable feedback signal, performing normalized signal processing on the absolute value ratio, and performing full-angle measurement correction of the rotary table, wherein the precision is improved to 0.01 degrees.
Description
Technical Field
The invention relates to the technical field of servo control, in particular to a device and a method for measuring the full angle of a rotary transformer.
Background
The rotary transformer is a sensor which is driven by excitation, feedback voltage and a rotation angle form a certain sine-cosine relationship, and provides a high-precision position signal for a system. At present, special decoding chips AD2S series and AU6802N1 series are mostly adopted for the rotary size, but the rotary size is high in price, the occupied area of the chips is large, and the miniaturization, low cost and integrated design are not facilitated; and in some enterprises, institutions and colleges, CPLD and other logic chips are adopted to output digital sine waves through DA, a signal conditioning circuit is used to form a rotary-change excitation, and a high-precision AD acquisition chip is used to analyze rotary-change angles by methods such as direct arc tangent calculation, iterative calculation, a table look-up method, Taylor series approximate approximation and the like of rotary-change feedback signals. The direct arctangent calculation has the problem of singular point maximum values of 90 degrees and 270 degrees, so that the full-angle analysis of the rotation change cannot be realized, the iterative calculation, the table look-up method and the Taylor series rule need to occupy large DSP storage resources and have poor calculation accuracy, and the error is mostly about 0.2 degrees.
Therefore, the AD acquisition chip is used for completely replacing a special RDC chip to realize the decoding of the whole angle, and the serial problems of poor precision, complex algorithm, large calculation amount, unreliable continuous excitation signal synchronous tracking and the like exist, so that the requirements of low cost, miniaturization and high-precision demodulation in a high-precision seeker are difficult to realize by the rotary transformer.
Disclosure of Invention
In view of this, the present invention provides a device and a method for measuring a full angle of a resolver, which have a simple circuit structure, can meet the measurement requirement of low cost and miniaturization, and have high measurement accuracy.
In order to achieve the purpose, the technical scheme of the invention is as follows: a rotary transformer full-angle measuring device comprises a CPLD chip, an excitation circuit, a synchronous tracking circuit, a signal conditioning circuit, a rotary transformer, an AD acquisition chip and a DSP chip;
after the CPLD chip is electrified, a continuous digital sine wave with the frequency required by the rotary transformer is generated and sent to the excitation circuit.
The excitation circuit receives the digital sine waves and generates sine analog signals as sine excitation, and the excitation circuit outputs two paths of sine excitation, wherein one path of sine excitation is sent to the synchronous tracking circuit, and the other path of sine excitation is sent to the signal conditioning circuit.
The synchronous tracking circuit generates a tracking square wave signal T1 with the same frequency as the sinusoidal excitation, and the tracking square wave signal T1 is sent to the CPLD chip.
The signal conditioning circuit generates a rotary sine analog signal and a rotary cosine analog signal and sends the rotary sine analog signal and the rotary cosine analog signal to the rotary transformer.
The rotary variables output a sine feedback signal ASin and a cosine feedback signal Acos θ.
The CPLD chip detects and tracks the square wave signal T1, selects an acquisition point, and sends a conversion starting signal, namely a Convst signal, to the AD acquisition chip at the acquisition point; after receiving the Convst signal, the AD acquisition chip starts to acquire sine and cosine feedback signals ASin theta and Acos theta of the rotary transformer; after the AD acquisition chip finishes the acquisition, the CPLD chip sends a DSP interrupt signal INT signal to the DSP chip at the falling edge of the tracking square wave signal T1.
And the AD acquisition chip sends acquired rotary sine and cosine feedback signals ASin theta and Acos theta to the DSP chip.
The DSP chip carries out positioning of four quadrants according to signs of the sine feedback signals ASin theta and Acos theta and carries out eight-area division according to the absolute value ratio of the ASin theta and the Acos theta aiming at the sine and cosine feedback signals ASin theta and Acos theta of the rotary transformer; eight regions are two regions which are correspondingly divided from each quadrant according to diagonal lines; then, normalization signal processing is carried out according to the ratio of absolute values of sine and cosine feedback signals ASin theta and Acos theta of the two rotary variables to obtain an angle alpha in a monotonic interval of an arc tangent function, and angle translation is carried out according to the quadrant where the angle alpha is located to obtain a translation angle beta which is alpha + i pi/2; where i represents the translation coefficient, determined by the region in which θ is located.
The rotary transformer is fixed on the single-shaft turntable, and the full angle theta of the rotary transformer is k beta + delta and is accurately measured; where δ represents a resolver correction value, and k represents a resolver linear coefficient.
The DSP chip is interrupted after receiving the INT signal.
Further, the CPLD chip detects the tracking square wave signal T1, selects an acquisition point, sends a conversion start signal, i.e., a Convst signal, at the acquisition point, and sends the signal to the AD acquisition chip, specifically:
the rising edge of T1 is taken as an acquisition point, and the acquisition point plus the delay Δ T is taken as a transition start signal, i.e., the Convst signal.
Further, Δ T ═ (T1 × 1/2-T2)/2; t1 is the resolver period of the resolver; t2 is the sampling period of the AD acquisition chip.
Further, the eight regions are specifically: each quadrant is divided into two areas according to the diagonal line, namely, the I-th quadrant is composed of the 1 st area and the 2 nd area, and the like, and the IV-th quadrant is composed of the 7 th area and the 8 th area.
The angle α is: α ═ Arcctg | Sin θ |/| Cos θ |; the value of i is such that if θ is in the 1 st region, i is 0; if theta is in the 2 nd and 3 rd regions, i is 1; if theta is in the 4 th and 5 th regions, i is 2; if theta is in the 6 th and 7 th regions, i is 3; if θ is in the 8 th region, i is 4.
Another embodiment of the present invention further provides a resolver full-angle measurement method, in which a revolute cosine analog signal of a revolute sine analog signal is input to a resolver, and a revolute sine feedback signal ASin θ and a revolute cosine feedback signal Acos θ are obtained from an output end of the resolver.
Positioning four quadrants of ASin theta and Acos theta symbols, and dividing eight regions according to the absolute value ratio to obtain a region where theta is located; and carrying out normalization processing on the value, namely | Sinthetaj/ | Cos theta | belongs to [0,1] or | Cos theta |/| Sinthetaji belongs to [0,1], and constructing according to a construction function of the translation angle to obtain the translation angle beta.
The function of the translation angle is constructed as follows:
if θ is in the 1 st region, the 1 st region construction function β ═ Arcctg | Sin θ |/| Cos θ | +0 π/2.
If θ is in the 2 nd and 3 rd regions, the 2 nd and 3 rd region constructors β ═ Arcctg | Cos θ |/| Sin θ | +1 pi/2.
If θ is in the 4 th and 5 th regions, the 4 th and 5 th region constructors β ═ Arcctg | Sin θ |/| Cos θ | +2 π/2.
If θ is in the 6 th and 7 th regions, the 6 th and 7 th region constructors β ═ Arcctg | Cos θ |/| Sin θ | +3 pi/2.
If θ is in the 8 th region, the 8 th region construction function β ═ Arcctg | Sin θ |/| Cos θ | +4 π/2.
Further, after obtaining the translation angle β, the resolver is fixed to a single-axis turret, and a precision measurement of a total rotation angle θ, which is k β + δ, is performed, where δ is a rotation correction value and k is a rotation linear coefficient.
Has the advantages that:
1) the device and the method for measuring the full angle of the rotary transformer provided by the invention can be used for carrying out normalized signal processing according to the quadrant and region judgment of the rotary transformer feedback signal and the absolute value ratio, carrying out full-angle measurement correction on the rotary table and improving the precision to 0.01 degrees. The hardware circuit is simple, the AD acquisition chip, the CPLD chip, the DSP chip and the like of the original circuit are adopted, the integration level is high, and the number of devices is small; meanwhile, angle analysis is performed by self-simple software, so that the servo control integrated design is facilitated; the invention therefore enables low-cost, compact measurement requirements.
3) The rotating transformer full-angle measuring device and method provided by the invention have high reliability. The hardware circuit adopts an operational amplifier and a plurality of resistors to form a synchronous tracking circuit, generates a synchronous tracking square wave T1, reduces the logic design of the CPLD and improves the reliability of the hardware circuit; meanwhile, the software analysis carries out angle conversion in the arc tangent monotonous interval, thereby reducing the complexity of the algorithm, reducing the memory resource of the software and improving the reliability of the system.
Drawings
Fig. 1 is a hardware connection diagram of a resolver full-angle measurement apparatus according to an embodiment of the present invention;
fig. 2 is an equivalent schematic diagram of system logic acquisition in a resolver full-angle measurement apparatus according to an embodiment of the present invention.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The invention provides a rotary transformer full-angle measuring device which comprises a CPLD chip, an excitation circuit, a synchronous tracking circuit, a signal conditioning circuit, a rotary transformer, an AD acquisition chip and a DSP chip.
After the CPLD chip is electrified, a continuous digital sine wave with the frequency required by the rotary transformer is generated and sent to the excitation circuit.
The excitation circuit receives the digital sine waves and generates sine analog signals as sine excitation, and the excitation circuit outputs two paths of sine excitation, wherein one path of sine excitation is sent to the synchronous tracking circuit, and the other path of sine excitation is sent to the signal conditioning circuit.
The synchronous tracking circuit generates a tracking square wave signal T1 with the same frequency as the sinusoidal excitation, and the tracking square wave signal T1 is sent to the CPLD chip.
The signal conditioning circuit generates a rotary sine analog signal and a rotary cosine analog signal and sends the rotary sine analog signal and the rotary cosine analog signal to the rotary transformer.
The rotary variables output a sine feedback signal ASin and a cosine feedback signal Acos θ.
The CPLD chip detects and tracks the square wave signal T1, selects an acquisition point, and sends a conversion starting signal, namely a Convst signal, to the AD acquisition chip at the acquisition point; in the embodiment of the present invention, the rising edge of T1 is used as the acquisition point, and the acquisition point plus the delay Δ T is used as the switching start signal, i.e., the Convst signal. Δ T ═ (T1 × 1/2-T2)/2; t1 is the resolver period of the resolver; t2 is the sampling period of the AD acquisition chip.
After receiving the Convst signal, the AD acquisition chip starts to acquire sine and cosine feedback signals ASin theta and Acos theta of the rotary transformer; after the AD acquisition chip finishes the acquisition, the CPLD chip sends a DSP interrupt signal INT signal to the DSP chip at the falling edge of the tracking square wave signal T1.
And the AD acquisition chip sends acquired rotary sine and cosine feedback signals ASin theta and Acos theta to the DSP chip.
The DSP chip carries out positioning of four quadrants according to signs of the sine feedback signals ASin theta and Acos theta and carries out eight-area division according to the absolute value ratio of the ASin theta and the Acos theta aiming at the sine and cosine feedback signals ASin theta and Acos theta of the rotary transformer; eight regions are two regions which are correspondingly divided from each quadrant according to diagonal lines; then, normalization signal processing is carried out according to the ratio of absolute values of sine and cosine feedback signals ASin theta and Acos theta of the two rotary variables to obtain an angle alpha in a monotonic interval of an arc tangent function, and angle translation is carried out according to the quadrant where the angle alpha is located to obtain a translation angle beta which is alpha + i pi/2; wherein i represents a translation coefficient and is determined by the area where theta is located; the eight regions are specifically: dividing each quadrant into two regions according to a diagonal line, wherein the I-th quadrant is composed of a 1 st region and a 2 nd region, and the like, and the IV-th quadrant is composed of a 7 th region and an 8 th region; the angle α is: α ═ Arcctg | Sin θ |/| Cos θ |; the value of i is 0 if θ is in the 1 st region; if theta is in the 2 nd and 3 rd regions, i is 1; if θ is in the 4 th and 5 th regions, i is 2; if theta is in the 6 th and 7 th regions, i is 3; if θ is in the 8 th region, i is 4.
The rotary transformer is fixed on the single-shaft turntable, and the full angle theta of the rotary transformer is k beta + delta and is accurately measured; where δ represents a resolver correction value, and k represents a resolver linear coefficient.
The DSP chip interrupts after receiving the INT signal.
FIG. 1 shows a connection diagram of resolver hardware, wherein the hardware includes a floating-point DSP28335 from TI, a CPLD EPM1270T144I5 from ALTERA, an AD chip, a DA chip, and an operational amplifier.
Another embodiment of the present invention further provides a rotation transformation full angle measurement method, which includes the following specific implementation steps:
1) according to the diagram of fig. 1, devices such as DSP, CPLD, resolver, etc. are connected by hardware.
2) According to the scheme shown in fig. 2, a CPLD performs digital logic sine signal design, generates continuous sine excitation through an excitation circuit, and generates two paths of sine and cosine excitation through a signal conditioning circuit; meanwhile, the sine excitation generates a tracking square wave T1 through a synchronous tracking circuit; the rising edge of T1 is used as the reference for starting the AD acquisition rotary transformer feedback signal, and after a proper time delay Δ T, where Δ T is (rotary transformer period 1/2-AD sampling period)/2, the AD conversion signal Convst is started, and the falling edge of T1 is used as the interrupt signal INT for triggering the DSP.
3) And performing quadrant judgment in a rectangular coordinate system according to the signs of the feedback signals ASin theta and Acos theta, and simultaneously dividing each quadrant into two regions according to a diagonal line, wherein the I-th quadrant is composed of a 1-st region and a 2-nd region, and the like, and the IV-th quadrant is composed of a 7-th region and an 8-th region, which are shown in the following table.
4) The normalization signal processing is carried out according to the ratio of the absolute values of the feedback signals ASin theta and Acos theta, the larger absolute value is always kept as a denominator, so that the normalization processing, namely | Sinthetaj/ | Cos thetaji belongs to [0,1] or | Cos thetaji/| Sinthetaji belongs to [0,1], is realized, the calculation of the angle alpha is completed in the monotonic interval of the arctan function according to the construction, the angle beta is obtained by carrying out angle translation according to the quadrant where the angle is located, and the problems of 90-degree and 270-degree maximum values of the arctan function singular point are avoided, and the specific translation angle is as follows:
the 1 st region constructor beta is Arcctg | Sintheta |/| Cos theta | +0 pi/2;
the 2 nd and 3 rd region constructors beta are-Archctg | Cos theta |/| Sin theta | +1 pi/2;
the 4 th and 5 th region constructors beta are Arcctg | Sintheta |/| Cos θ | +2 pi/2;
the 6 th and 7 th region constructors beta are-Archctg | Cos theta |/| Sin theta | +3 pi/2;
the 8 th region constructor beta is Arcctg | Sintheta |/| Cos theta | +4 pi/2;
5) and finally, fixing the rotary transformer on a single-shaft turntable, and accurately measuring a rotary transformation full angle theta which is k beta + delta, wherein delta refers to a rotary transformation correction value, and k refers to a rotary transformation linear coefficient. Therefore, the high-precision analysis of the rotary transformation full angle is completed, and the precision error is improved to 0.01 degrees.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The device for measuring the full angle of the rotary transformer is characterized by comprising a CPLD chip, an excitation circuit, a synchronous tracking circuit, a signal conditioning circuit, the rotary transformer, an AD acquisition chip and a DSP chip;
after the CPLD chip is electrified, generating continuous digital sine waves with the frequency required by the rotary transformer and sending the continuous digital sine waves into the excitation circuit;
the excitation circuit generates a sine analog signal as sine excitation after receiving the digital sine wave, and outputs two paths of sine excitation, wherein one path of sine excitation is sent to the synchronous tracking circuit, and the other path of sine excitation is sent to the signal conditioning circuit;
the synchronous tracking circuit generates a tracking square wave signal T1 with the same frequency as the sinusoidal excitation, and the tracking square wave signal T1 is sent to the CPLD chip;
the signal conditioning circuit generates a rotary sine analog signal and a rotary cosine analog signal and sends the rotary sine analog signal and the rotary cosine analog signal to the rotary transformer;
the rotary transformer outputs a sine feedback signal ASin and a cosine feedback signal Acos theta;
the CPLD chip detects the tracking square wave signal T1, selects an acquisition point, and sends a conversion starting signal, namely a Convst signal, to the AD acquisition chip at the acquisition point; after receiving the Convst signal, the AD acquisition chip starts to acquire sine and cosine feedback signals ASin theta and Acos theta of the rotary transformer; after the AD acquisition chip finishes the acquisition, the CPLD chip sends a DSP interrupt signal INT signal to the DSP chip at the falling edge of the tracking square wave signal T1;
the AD acquisition chip sends the acquired sine and cosine feedback signals ASin theta and Acos theta of the rotary transformer to the DSP chip;
the DSP chip carries out positioning of four quadrants according to signs of the sine feedback signals ASin theta and Acos theta and carries out eight-area division according to the absolute value ratio of the ASin theta and the Acos theta aiming at the sine and cosine feedback signals ASin theta and Acos theta of the rotary transformer; the eight regions are two regions which are correspondingly divided from each quadrant according to diagonal lines; then, normalization signal processing is carried out according to the ratio of absolute values of sine and cosine feedback signals ASin theta and Acos theta of the two rotary variables to obtain an angle alpha in a monotonic interval of an arc tangent function, and angle translation is carried out according to the quadrant where the angle alpha is located to obtain a translation angle beta which is alpha + i pi/2; wherein i represents a translation coefficient and is determined by the area where theta is located;
the rotary transformer is fixed on the single-shaft turntable, and the full angle theta of the rotary transformer is k beta + delta and is accurately measured; wherein δ represents a resolver correction value, and k represents a resolver linear coefficient;
the DSP chip interrupts after receiving the INT signal.
2. The device of claim 1, wherein the CPLD chip detects the tracking square wave signal T1, selects an acquisition point, and sends a conversion start signal, i.e., a Convst signal, at the acquisition point to the AD acquisition chip, specifically:
the rising edge of T1 is taken as an acquisition point, and the acquisition point plus the delay Δ T is taken as a transition start signal, i.e., a Convst signal.
3. The apparatus of claim 2, wherein Δ T ═ (T1 x 1/2-T2)/2; t1 is the resolver period of the resolver; and T2 is the sampling period of the AD acquisition chip.
4. The device according to any one of claims 1 to 3, wherein the eight zones are in particular: dividing each quadrant into two regions according to a diagonal line, wherein the I-th quadrant is composed of a 1 st region and a 2 nd region, and the like, and the IV-th quadrant is composed of a 7 th region and an 8 th region;
the angle α is: α ═ Arcctg | Sin θ |/| Cos θ |; the value of i is 0 if θ is in the 1 st region; if theta is in the 2 nd and 3 rd regions, i is 1; if theta is in the 4 th and 5 th regions, i is 2; if θ is in the 6 th and 7 th regions, i is 3; if θ is in the 8 th region, i is 4.
5. A resolver full-angle measurement method is characterized in that a resolver cosine analog signal of a resolver sine analog signal is input into a resolver, and a resolver sine feedback signal ASin theta and a resolver cosine feedback signal Acos theta are obtained from an output end of the resolver;
positioning four quadrants of ASin theta and Acos theta symbols, and dividing eight regions according to the absolute value ratio to obtain a region where theta is located; carrying out normalization processing on the value, namely enabling the value of | Sin theta |/| Cos theta |, to be in the same place as [0,1] or enabling the value of | Cos theta |/| Sin theta |, to be in the same place as [0,1], and constructing according to a construction function of a translation angle to obtain a translation angle beta;
the function of the translation angle is constructed as follows:
if theta is in the 1 st region, the 1 st region construction function beta is Arcctg | Sinthetaj|/| Cos thetaj| +0 pi/2;
if theta is in the 2 nd and 3 rd regions, the 2 nd and 3 rd region constructors beta are-Archctg | Cos theta |/| Sin theta | +1 pi/2;
if theta is in the 4 th and 5 th regions, the 4 th and 5 th region constructors beta are Arcctg | Sinthetaj/ | Cos thetaji +2 pi/2;
if theta is in the 6 th and 7 th regions, the 6 th and 7 th region constructors beta are-Arcctg | Cos theta |/| Sin theta | +3 pi/2;
if θ is in the 8 th region, the 8 th region construction function β ═ Arcctg | Sin θ |/| Cos θ | +4 π/2.
6. The method as claimed in claim 5, characterized in that after obtaining the translation angle β, the resolver is fixed on a single-axis turntable, and an accurate measurement of the rotation full angle θ ═ k β + δ is performed, where δ is the value of the rotation correction, and k is the rotation linearity coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110070702.7A CN112945288B (en) | 2021-01-19 | 2021-01-19 | Full-angle measuring device and method for rotary transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110070702.7A CN112945288B (en) | 2021-01-19 | 2021-01-19 | Full-angle measuring device and method for rotary transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112945288A CN112945288A (en) | 2021-06-11 |
| CN112945288B true CN112945288B (en) | 2022-09-06 |
Family
ID=76235661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110070702.7A Active CN112945288B (en) | 2021-01-19 | 2021-01-19 | Full-angle measuring device and method for rotary transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112945288B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113358965A (en) * | 2021-06-24 | 2021-09-07 | 玄天智能科技(常州)有限公司 | Quadrant phase discrimination system and phase discrimination method of rotary transformer |
| CN115638994A (en) * | 2022-09-30 | 2023-01-24 | 上汽通用五菱汽车股份有限公司 | Torsional vibration fault determination method, device and system and vehicle |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000055695A (en) * | 1998-08-05 | 2000-02-25 | Toyota Motor Corp | Resolver signal processing device |
| CN101521480A (en) * | 2008-11-21 | 2009-09-02 | 西北工业大学 | Resolution method and resolver for signals of rotating transformer |
| CN202041221U (en) * | 2011-03-02 | 2011-11-16 | 西安交通大学 | Subdividing device of sine/cosine encoder |
| CN102661754A (en) * | 2012-05-09 | 2012-09-12 | 合肥工业大学 | Digital converter for rotary transformer |
| CN102879021A (en) * | 2012-09-24 | 2013-01-16 | 重庆华渝电气仪表总厂 | Rotary transformer angle code converting method and converter |
| CN103312332A (en) * | 2013-05-07 | 2013-09-18 | 武汉华中天经光电***有限公司 | Digital converter of rotary transformer and conversion method |
| CN105553348A (en) * | 2015-11-30 | 2016-05-04 | 奇瑞汽车股份有限公司 | Motor rotor position detection method and device |
| CN106787991A (en) * | 2016-05-26 | 2017-05-31 | 上海拿森汽车电子有限公司 | The angle coding/decoding method of rotary transformer in electric boosting steering system |
| CN108896075A (en) * | 2018-05-11 | 2018-11-27 | 北京航空航天大学 | A kind of rotary transformer angular displacement closed loop decoding System and method for based on FPGA |
| CN109739122A (en) * | 2018-12-10 | 2019-05-10 | 河北汉光重工有限责任公司 | A kind of half wave excitation fast lock phase method |
| CN109787617A (en) * | 2018-12-10 | 2019-05-21 | 河北汉光重工有限责任公司 | A method of the rotation based on CPLD becomes excited signal and determines frequency locking phase |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104246442B (en) * | 2012-04-12 | 2017-04-26 | 三菱电机株式会社 | Resolver device, motor control device, and motor control method |
-
2021
- 2021-01-19 CN CN202110070702.7A patent/CN112945288B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000055695A (en) * | 1998-08-05 | 2000-02-25 | Toyota Motor Corp | Resolver signal processing device |
| CN101521480A (en) * | 2008-11-21 | 2009-09-02 | 西北工业大学 | Resolution method and resolver for signals of rotating transformer |
| CN202041221U (en) * | 2011-03-02 | 2011-11-16 | 西安交通大学 | Subdividing device of sine/cosine encoder |
| CN102661754A (en) * | 2012-05-09 | 2012-09-12 | 合肥工业大学 | Digital converter for rotary transformer |
| CN102879021A (en) * | 2012-09-24 | 2013-01-16 | 重庆华渝电气仪表总厂 | Rotary transformer angle code converting method and converter |
| CN103312332A (en) * | 2013-05-07 | 2013-09-18 | 武汉华中天经光电***有限公司 | Digital converter of rotary transformer and conversion method |
| CN105553348A (en) * | 2015-11-30 | 2016-05-04 | 奇瑞汽车股份有限公司 | Motor rotor position detection method and device |
| CN106787991A (en) * | 2016-05-26 | 2017-05-31 | 上海拿森汽车电子有限公司 | The angle coding/decoding method of rotary transformer in electric boosting steering system |
| CN108896075A (en) * | 2018-05-11 | 2018-11-27 | 北京航空航天大学 | A kind of rotary transformer angular displacement closed loop decoding System and method for based on FPGA |
| CN109739122A (en) * | 2018-12-10 | 2019-05-10 | 河北汉光重工有限责任公司 | A kind of half wave excitation fast lock phase method |
| CN109787617A (en) * | 2018-12-10 | 2019-05-21 | 河北汉光重工有限责任公司 | A method of the rotation based on CPLD becomes excited signal and determines frequency locking phase |
Non-Patent Citations (4)
| Title |
|---|
| 基于ＣＰＬＤ和单片机的旋转变压器鉴相电路的设计;陈裕国等;《仪表技术》;20060531;全文 * |
| 基于DSP的旋转变压器解码***设计;崔波等;《微电机》;20170430;全文 * |
| 基于FPGA的旋转变压器CORDIC解码算法的研究;吴洋等;《测控技术》;20180228;全文 * |
| 提高旋转变压器角度测量精度的细分方法;张力等;《三峡大学学报》;20070831;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112945288A (en) | 2021-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112945288B (en) | Full-angle measuring device and method for rotary transformer | |
| CN108155910B (en) | High-speed sine and cosine encoder decoding method based on FPGA | |
| WO2021114419A1 (en) | Calibration method, apparatus and device for rotary magnetoelectric encoder | |
| CN206095144U (en) | Take self correction's inductosyn measurement system | |
| CN105978570A (en) | High-precision signal processing system of sine and cosine encoder | |
| CN103312332A (en) | Digital converter of rotary transformer and conversion method | |
| CN205246106U (en) | High accuracy sine -cosine resolver's simulation implementation structure | |
| CN100462686C (en) | Synchro/rotary transformer-analog DC voltage transforming method | |
| CN102829714A (en) | Method for realizing absolute angle measurement based on round inductosyn | |
| CN104567918A (en) | Dynamic angle acquisition device based on angle sensor | |
| WO2021017074A1 (en) | Optical-magnetic hybrid encoder system | |
| CN109506681B (en) | Magnetic encoder chip structure based on silicon Hall effect | |
| CN109739122B (en) | Half-wave excitation rapid phase locking method | |
| CN111800638B (en) | Decoding method and decoding device | |
| Banerjee et al. | A novel FPGA-based LVDT signal conditioner | |
| CN111665765B (en) | Rotary transformer decoding system based on DSP | |
| JP2609845B2 (en) | Insertion circuit using decoder | |
| Yepez et al. | An FPGA-based closed-loop approach of angular displacement for a resolver-to-digital-converter | |
| Tian et al. | Design and implementation of ISA card for rotary inductosyn signal processing based on AD2S1210 and CPLD | |
| Li et al. | The design and implementation of universal interface circuit for photoelectric encoder | |
| CN112506029B (en) | TDC circuit system adopting multiple annular delay chains | |
| US3631469A (en) | Systems for comparing electrical signals | |
| US11722343B1 (en) | Resolver integral demodulation using zero crossing points | |
| CN215528993U (en) | Shaft angle converter module | |
| CN116046030A (en) | Sine and cosine encoder subdivision device and method adopting digital hysteresis comparator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |