CN106936387A - The correcting module and its method of sine and cosine measurement signal - Google Patents
The correcting module and its method of sine and cosine measurement signal Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B28/00—Generation of oscillations by methods not covered by groups H03B5/00 - H03B27/00, including modification of the waveform to produce sinusoidal oscillations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/266—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light by interferometric means
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M5/00—Conversion of the form of the representation of individual digits
- H03M5/22—Conversion to or from representation by sinusoidal signals
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- Theoretical Computer Science (AREA)
- Power Engineering (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 the correcting module and its method of a kind of sine and cosine measurement signal, its feature includes：Sine difference is put unit, sine and goes dc shift unit, sinusoidal magnitude value adjustment unit, cosine difference to put unit, cosine and removes dc shift unit, cosine amplitude adjustment unit and orthogonalization unit, is a kind of not by the sine and cosine measurement signal modification method of any software approach.The present invention can in real time to dc shift present in sine and cosine measurement signal, amplitude not etc., the class main error of none three is modified, so as to provide high-quality signal for follow-up subdivision, sensing and counting, to improve certainty of measurement, and mitigate subsequent software amendment burden.
Description
Technical field
The present invention is applied to the measurement occasion based on orthogonal string wave measurement signal such as grating, laser interferometer, specifically
Say be a kind of sine and cosine measurement signal correcting module and its method.
Background technology
The survey tool based on orthogonal string ripple signal such as grating sensor, laser interferometer is obtained in various measurement occasions
Extensive use is arrived, industrial common signal processing flow is：Photoelectric signal transformation-preposition amplification-differential amplification-sensing with
Subdivision.Ideally, should obtain that the dc shift of two-way zero, amplitude be equal after differential amplification, phase difference is 90 ° perfect orthogonal
String ripple signal (refering to shown in Fig. 5 dotted lines, its Lie groupoid is ellipse of the center of circle in origin), thus for follow-up subdivision, sensing and
Count and accuracy guarantee is provided, but because the influence of various factors, can inevitably deposit between actual signal and ideal signal
Certain deviation (referring to Fig. 5 solid lines), this signal directly being counted and is segmented will produce very big error, and with this
When signal is as feedback information in control loop, it will cause serious control mistake.Therefore special signal correction need to be designed
Scheme come try reduce this deviation, and then improve certainty of measurement.
At present, the method for software fitting is all used to present in sine and cosine measurement signal in most literature and actual measurement
Dc shift, non-constant amplitude, the class error of none three are modified, in theory can be by increasing the unlimited approaching to reality of sample rate
String ripple signal, and method using Mathematical Fitting asks for three class errors and eliminated, but software correction method increased letter
Complexity and the processor burden of number acquisition software, and due to signal acquisition precision be limited to A/D conversions digit, sample rate etc. because
Element so that for error correction signal and actual signal between still in the presence of certain deviation and be difficult to signal in real time repair
Just.
The content of the invention
The present invention is in order to solve the weak point that above-mentioned prior art is present, there is provided a kind of amendment of sine and cosine measurement signal
Module and its method, to can correct in real time dc shift, amplitude present in string wave measurement signal not etc., the class of none three
Error, so as to for follow-up subdivision, sensing and counting provide high-quality signal, be repaiied with improving certainty of measurement, and mitigating subsequent software
Positive burden.
The present invention solves technical problem and uses following technical scheme：
A kind of the characteristics of correcting module of sine and cosine measurement signal of the present invention, includes：Sine difference is put unit, sine and removes direct current
Drift cells, sinusoidal magnitude value adjustment unit, cosine difference put unit, cosine go dc shift unit, cosine amplitude adjustment unit and
Orthogonalization unit；
The sinusoidal difference is put unit receiving phase difference and is 180 ° of two-way sinusoidal signal sin+ and sin- and is processed, and is obtained
To sinusoidal differential amplification signal sin0 all the way and it is supplied to the sine to go dc shift unit to be processed, obtains the drift of zero direct current
Move sinusoidal signal sin1；Amplitude tune is carried out to the zero dc shift sinusoidal signal sin1 by the sinusoidal magnitude value adjustment unit
Section, the sinusoidal signal sin2 after being corrected, and it is supplied to the orthogonalization unit；
The cosine difference is put unit receiving phase difference and is 180 ° of two-way cosine signal cos+ and cos- and is processed, and is obtained
To the differential amplification signal cos0 of cosine all the way and it is supplied to the cosine to go dc shift unit to be processed, obtains the drift of zero direct current
Move cosine signal cos1；Amplitude tune is carried out to the zero dc shift cosine signal cos1 by the cosine amplitude adjustment unit
Section, the cosine signal cos2 after being corrected, and it is supplied to the orthogonalization unit；
The orthogonalization unit is orthogonalized treatment to the sinusoidal signal sin2 and cosine signal cos2 after the correction,
Obtain strict orthogonal, amplitude are equal, dc shift is zero sinusoidal signal sin and cosine signal cos.
The characteristics of correcting module of sine and cosine measurement signal of the present invention, lies also in, and the sine removes dc shift list
Unit or cosine go the dc shift unit to include：Low pass filter and add circuit；
Received sinusoidal all the way differential amplification signal sin0 is obtained by the low pass filter or cosine is differential all the way
Amplify the dc shift signal in signal cos0, and be supplied to the add circuit for removing the dc shift signal, from
And obtain zero dc shift sinusoidal signal sin1 or zero dc shift cosine signal cos1.
The sinusoidal magnitude value adjustment unit or cosine amplitude adjustment unit include：First absolute value circuit, sampling keep electricity
Road, differential circuit, the second absolute value circuit, window comparator and division circuit；
By first absolute value circuit to the zero dc shift sinusoidal signal sin1 or zero dc shift cosine signal
Cos1 carries out the treatment that takes absolute value, and the result for obtaining is supplied to the sampling hold circuit；
The zero dc shift sinusoidal signal sin1 or zero dc shift cosine signal cos1 are entered by the differential circuit
Row differential process, obtain differential signal and are supplied to second absolute value circuit；Second absolute value circuit is to described micro-
Sub-signal carries out the treatment that takes absolute value, and the result for obtaining is supplied to the window comparator to be processed, and obtains trigger signal hair
Give the sampling hold circuit；
Trigger signal of the sampling hold circuit according to received by, to the result of first absolute value circuit
Real-time amplitude collection is carried out, so as to obtain the amplitude information of consecutive variations and be supplied to the division circuit；
The division circuit is to the zero dc shift sinusoidal signal sin1 or zero dc shift cosine signal cos1 and institute
Stating amplitude information carries out division calculation, so as to sinusoidal signal sin2 and cosine signal cos2 after being corrected.
When the amplitude of the zero dc shift sinusoidal signal sin1 or zero dc shift cosine signal cos1 changes synchronous,
The sinusoidal magnitude value adjustment unit and cosine amplitude adjustment unit can also using electric resistance partial pressure method to zero dc shift just
String signal sin1 or zero dc shift cosine signal cos1 carry out amplitude regulation, the equal sinusoidal signal of amplitude after being corrected
Sin2 and cosine signal cos2.
A kind of the characteristics of modification method of sine and cosine measurement signal of the present invention is to carry out as follows：
Step 1, it is that 180 ° of two-way sinusoidal signal sin+ and sin- carries out differential enhanced processing to phase difference, obtains all the way
Sinusoidal differential amplification signal sin0；Meanwhile, it is that 180 ° of two-way cosine signal cos+ and cos- carries out differential amplification to phase difference
Treatment, obtains the differential amplification signal cos0 of cosine all the way；
Step 2, using low pass filter obtain described in sinusoidal differential amplification signal sin0 or cosine is differential all the way puts all the way
Dc shift signal in big signal cos0, and sinusoidal differential amplification signal sin0 or all the way described in utilization add circuit removal
The differential dc shift signal amplified in signal cos0 of road cosine, obtains zero dc shift sinusoidal signal sin1 and zero dc shift
Cosine signal cos1；
Step 3, constant amplitude regulation is carried out to zero dc shift sinusoidal signal sin1 and zero dc shift cosine signal cos1, obtained
Sinusoidal signal sin2 and cosine signal cos2 after to correction；
Step 3.1, the zero dc shift sinusoidal signal sin1 and zero dc shift cosine signal cos1 are carried out respectively
Take absolute value treatment, obtains corresponding first absolute value result and is gathered for amplitude；
Step 3.2, the zero dc shift sinusoidal signal sin1 and zero dc shift cosine signal cos1 are carried out respectively
Taken absolute value again after differential process, obtain corresponding second absolute value result carries out window comparing again, so as to obtain corresponding width
Value trigger collection signal；
Step 3.3, according to corresponding amplitude trigger collection signal, corresponding first absolute value result is carried out in real time respectively
Amplitude is gathered, so as to obtain the amplitude information of corresponding consecutive variations；
Step 3.4, by the zero dc shift sinusoidal signal sin1 and zero dc shift cosine signal cos1 respectively with phase
The amplitude information answered carries out division calculation, so as to sinusoidal signal sin2 and cosine signal cos2 after being corrected；
Step 4, treatment is orthogonalized to the sinusoidal signal sin2 and cosine signal cos2 after the correction, obtains strict
Orthogonal, amplitude is equal, dc shift is zero sinusoidal signal sin and cosine signal cos.
Compared with the prior art, beneficial effects of the present invention are embodied in：
1st, compared to conventional software correction method, the present invention is a kind of not by the sine and cosine measurement of any software approach
Signal correction method, using pure hardware circuit means to dc shift, amplitude present in two-way sine and cosine measurement signal not etc.,
The class error of none three is modified, and overcomes software approximating method to carry out mass data computing, the weakness of fitting, drops significantly
The low complexity of follow-up signal acquisition software, and special interpolation chip can be used directly high magnification numbe is carried out to revised signal
Subdivision obtains the square-wave signal for being easy to sensing to count.
2nd, compared to existing hardware circuit amendment scheme, the present invention can in real time be corrected to three class errors, specific body
Now：The present invention is obtained the dc shift that is continually changing in signal using low pass filter and it is entered by add circuit in real time
Row is eliminated, and overcomes the defect that can not carry out real-time elimination in existing method to the dc shift in sine and cosine measurement signal；This
Invention take differential by the use of original signal after signal zero-crossing as amplitude information in each cycle collection signal, be capable of achieving it is just remaining
The real-time acquisition of string measurement signal amplitude information, and original signal is divided by with the amplitude information for getting, real-time revise signal
Amplitude, obtains the sine and cosine measurement signal that amplitude is always, overcomes the letter that cannot be continually changing to amplitude in the prior art
Number carry out the defect of real-time amplitude correction.
3rd, it is conventional at present for the two-way sine and cosine measurement signal that there is none error (i.e. phase difference is not 90 °)
Orthogonalization method be it is separately summed to subtract on the basis of regulation two paths of signals amplitude is equal because when amplitude is equal, two
Road signal vector figure is the adjacent both sides of rhombus, two signals and two diagonal of the rhombus are with difference, and rhombus is diagonal
Line must orthogonal (principle refer to Fig. 6), but be limited to that signal amplitude can not be carried out real-time detection and amendment, so existing application is simultaneously
It cannot be guaranteed that two paths of signals amplitude is essentially equal, also it is difficult to obtain perfect orthogonal string ripple signal, the present invention believes by original
Number the signal zero-crossing after differential is taken as amplitude trigger collection information, can obtain in real time and revise signal amplitude, so that it is guaranteed that
Feasibility in the orthogonalization principle practical process.
Brief description of the drawings
Fig. 1 is the overall schematic of correcting module of the present invention；
Fig. 2 goes dc shift cell schematics for the present invention；
Fig. 3 a are that amplitude of the present invention changes nonsynchronous two signal amplitudes normalization schematic diagram；
Fig. 3 b are two synchronous signal amplitude Principles of Regulation figures of amplitude change of the present invention；
Fig. 4 is signal orthogonalization unit schematic diagram of the present invention；
Fig. 5 is actual positive signal (solid line) to be repaired and ideal signal (dotted line) Lie groupoid；
Fig. 6 is orthogonalization principle schematic of the present invention.
Specific embodiment
In the present embodiment, as shown in figure 1, sine and cosine measurement signal correcting module includes：Sine difference is put unit, sine and is gone directly
Stream drift cells, sinusoidal magnitude value adjustment unit, cosine difference are put unit, cosine and go dc shift unit, cosine amplitude adjustment unit
With orthogonalization unit.
Sine difference is put unit receiving phase difference and is 180 ° of two-way sinusoidal signal sin+ and sin- and is processed, and obtains one
The sinusoidal differential amplification signal sin0 in road is simultaneously supplied to sine to go dc shift unit to be processed, and obtains the sinusoidal letter of zero dc shift
Number sin1, carries out amplitude regulation, after being corrected just by sinusoidal magnitude value adjustment unit to zero dc shift sinusoidal signal sin1
String signal sin2, and it is supplied to orthogonalization unit；
Cosine difference is put unit receiving phase difference and is 180 ° of two-way cosine signal cos+ and cos- and is processed, and obtains one
Cosine differential amplification signal cos0 in road is simultaneously supplied to cosine to go dc shift unit to be processed, and obtains zero dc shift cosine letter
Number cos1；Amplitude regulation is carried out to zero dc shift cosine signal cos1 by cosine amplitude adjustment unit, it is remaining after being corrected
String signal cos2, and it is supplied to orthogonalization unit；
Orthogonalization unit is orthogonalized treatment to the sinusoidal signal sin2 and cosine signal cos2 after correction, obtains strict
Orthogonal, amplitude is equal, dc shift is zero sinusoidal signal sin and cosine signal cos.
In existing hardware circuit modifications scheme, majority is using the dc shift in the method removal signal of DC compensation, nothing
Method obtains and compensates the dc shift being continually changing in actual signal in real time, and goes dc shift method proposed in the present invention
The defect can be overcome, realization removes dc shift in real time.As shown in Fig. 2 sine goes dc shift unit or cosine to remove dc shift
Unit includes：Low pass filter and add circuit, low pass filter obtain received sinusoidal all the way differential amplification letter in real time
The differential dc shift signal amplified in signal cos0 of number sin0 or all the way cosine, obtains and dc shift opposite polarity in signal
Signal, and add circuit is supplied to for removing dc shift, so as to obtain zero dc shift sinusoidal signal sin1 or zero straight
Stream drift cosine signal cos1.Wherein, the cut-off frequency of low pass filter can be examined according to the frequency range of measurement signal and comprehensively
Consider the factor flexible designs such as response time.
The amplitude of actual sine and cosine measurement signal is continually changing, and it requires that amplitude adjustment unit circuit can be obtained in real time
The number of winning the confidence amplitude information is simultaneously corrected, and is associated original signal and is taken signal zero-crossing after differential and corresponds to original signal amplitude point just this is special
Levy, using differential signal zero crossing as amplitude trigger collection signal, differential signal zero passage instantaneous trigger gathers signal amplitude, other
Time keeps the collection result as amplitude correction signal, and realizes amplitude correction using division circuit, is capable of achieving signal amplitude
Real-time amendment.The present invention provides a kind of implementation method of above-mentioned thought, after positive signal to be repaired takes differential and takes absolute value, uses
Window comparator produces a burst pulse, to trigger sampling hold circuit collection current demand signal i.e. signal amplitude, after burst pulse,
The sampled result is kept, and positive signal to be repaired and the amplitude information are carried out into division arithmetic by division circuit, to realize that amplitude is returned
One changes, and the method can realize the real-time amendment of signal amplitude.
As shown in Figure 3 a, sinusoidal magnitude value adjustment unit or cosine amplitude adjustment unit include：First absolute value circuit, sampling
Holding circuit, differential circuit, the second absolute value circuit, window comparator and division circuit；
First absolute value circuit takes to zero dc shift sinusoidal signal sin1 or zero dc shift cosine signal cos1
Absolute value treatment, the result for obtaining is supplied to sampling hold circuit；
Differential circuit carries out differential process to zero dc shift sinusoidal signal sin1 or zero dc shift cosine signal cos1,
Obtain differential signal and be supplied to the second absolute value circuit；Second absolute value circuit carries out the treatment that takes absolute value to differential signal,
The result for obtaining is supplied to window comparator to be processed, and obtains trigger signal and is sent to sampling hold circuit；
Trigger signal of the sampling hold circuit according to received by, the result to the first absolute value circuit is carried out in real time
Amplitude is gathered, so as to obtain the amplitude information of consecutive variations and be supplied to division circuit；
Division circuit enters to zero dc shift sinusoidal signal sin1 or zero dc shift cosine signal cos1 with amplitude information
Row division calculation, so as to amplitude after being corrected equal sinusoidal signal sin2 and cosine signal cos2.
Additionally, when the amplitude change of zero dc shift sinusoidal signal sin1 or zero dc shift cosine signal cos1 is synchronous
When, sinusoidal magnitude value adjustment unit and cosine amplitude adjustment unit can also be floated using electric resistance partial pressure method (referring to Fig. 3 b) to zero direct current
Moving sinusoidal signal sin1 or zero dc shift cosine signal cos1 carries out amplitude regulation, obtains the equal sinusoidal signal sin2 of amplitude
With cosine signal cos2.
As shown in fig. 6, when amplitude is equal, the polar plot of two-way sine and cosine measurement signal is the adjacent both sides of rhombus, two letters
Number and two diagonal that the rhombus is with difference, and rhombus diagonal must be orthogonal, therefore can be in regulation two paths of signals amplitude phase
It is separately summed Deng on the basis of is subtracted, with the none error of revise signal.In aforesaid sinusoidal amplitude adjustment unit and remaining
On the basis of string amplitude adjustment unit real-time regulation two paths of signals amplitude is equal, sinusoidal signal sin2 and cosine signal cos2 distinguishes
Be added, subtract each other after can obtain the new signal sin and cos (refering to Fig. 4) of two-way strict orthogonal.
By processing the two-way new signal sin and cos that obtain above, strict orthogonal, amplitude are equal, dc shift is zero,
Its Lie groupoid is positive round of the center of circle in origin, can be directly used for follow-up subdivision, counts and sensing.
Claims (5)
1. a kind of correcting module of sine and cosine measurement signal, its feature includes：Sine difference is put unit, sine and removes dc shift list
Unit, sinusoidal magnitude value adjustment unit, cosine difference are put unit, cosine and go dc shift unit, cosine amplitude adjustment unit and orthogonalization
Unit；
The sinusoidal difference is put unit receiving phase difference and is 180 ° of two-way sinusoidal signal sin+ and sin- and is processed, and obtains one
The sinusoidal differential amplification signal sin0 in road is simultaneously supplied to the sine to go dc shift unit to be processed, and is obtaining zero dc shift just
String signal sin1；Amplitude regulation is carried out to the zero dc shift sinusoidal signal sin1 by the sinusoidal magnitude value adjustment unit, is obtained
Sinusoidal signal sin2 after to correction, and it is supplied to the orthogonalization unit；
The cosine difference is put unit receiving phase difference and is 180 ° of two-way cosine signal cos+ and cos- and is processed, and obtains one
Cosine differential amplification signal cos0 in road is simultaneously supplied to the cosine to go dc shift unit to be processed, and obtains more than zero dc shift
String signal cos1；Amplitude regulation is carried out to the zero dc shift cosine signal cos1 by the cosine amplitude adjustment unit, is obtained
Cosine signal cos2 after to correction, and it is supplied to the orthogonalization unit；
The orthogonalization unit is orthogonalized treatment to the sinusoidal signal sin2 and cosine signal cos2 after the correction, obtains
Strict orthogonal, amplitude are equal, dc shift is zero sinusoidal signal sin and cosine signal cos.
2. the correcting module of sine and cosine measurement signal according to claim 1, it is characterized in that, the sine removes dc shift
Unit or cosine go the dc shift unit to include：Low pass filter and add circuit；
Received sinusoidal all the way differential amplification signal sin0 or the differential amplification of cosine all the way is obtained by the low pass filter
Dc shift signal in signal cos0, and the add circuit is supplied to for removing the dc shift signal, so that
To zero dc shift sinusoidal signal sin1 or zero dc shift cosine signal cos1.
3. the correcting module of sine and cosine measurement signal according to claim 1, it is characterized in that, the sinusoidal magnitude value regulation is single
Unit or cosine amplitude adjustment unit include：First absolute value circuit, sampling hold circuit, differential circuit, the second absolute value circuit,
Window comparator and division circuit；
By first absolute value circuit to the zero dc shift sinusoidal signal sin1 or zero dc shift cosine signal cos1
The treatment that takes absolute value is carried out, the result for obtaining is supplied to the sampling hold circuit；
The zero dc shift sinusoidal signal sin1 or zero dc shift cosine signal cos1 are carried out by the differential circuit micro-
Office is managed, and is obtained differential signal and is supplied to second absolute value circuit；Second absolute value circuit is believed the differential
Number the treatment that takes absolute value is carried out, the result for obtaining is supplied to the window comparator to be processed, and obtains trigger signal and is sent to
The sampling hold circuit；
Trigger signal of the sampling hold circuit according to received by, the result to first absolute value circuit is carried out
Real-time amplitude collection, so as to obtain the amplitude information of consecutive variations and be supplied to the division circuit；
The division circuit is to the zero dc shift sinusoidal signal sin1 or zero dc shift cosine signal cos1 and the width
Value information carries out division calculation, so as to sinusoidal signal sin2 and cosine signal cos2 after being corrected.
4. the correcting module of sine and cosine measurement signal according to claim 1, it is characterized in that, when zero dc shift just
When the amplitude change of string signal sin1 or zero dc shift cosine signal cos1 is synchronous, the sinusoidal magnitude value adjustment unit and cosine
Amplitude adjustment unit can also be using electric resistance partial pressure method to the zero dc shift sinusoidal signal sin1 or zero dc shift cosine
Signal cos1 carries out amplitude regulation, amplitude equal sinusoidal signal sin2 and cosine signal cos2 after being corrected.
5. a kind of modification method of sine and cosine measurement signal, it is characterized in that carrying out as follows：
Step 1, it is that 180 ° of two-way sinusoidal signal sin+ and sin- carries out differential enhanced processing to phase difference, obtains sinusoidal all the way
Differential amplification signal sin0；Meanwhile, it is that 180 ° of two-way cosine signal cos+ and cos- carries out differential enhanced processing to phase difference,
Obtain the differential amplification signal cos0 of cosine all the way；
Step 2, obtained using low pass filter sinusoidal differential the amplifications signal sin0 all the way or all the way the differential amplification of cosine believe
Dc shift signal in number cos0, and using sinusoidal differential amplification signal sin0 or remaining all the way all the way described in add circuit removal
The differential dc shift signal amplified in signal cos0 of string, obtains zero dc shift sinusoidal signal sin1 and zero dc shift cosine
Signal cos1；
Step 3, constant amplitude regulation is carried out to zero dc shift sinusoidal signal sin1 and zero dc shift cosine signal cos1, obtain school
Sinusoidal signal sin2 and cosine signal cos2 after just；
Step 3.1, the zero dc shift sinusoidal signal sin1 and zero dc shift cosine signal cos1 are carried out taking respectively absolutely
To value treatment, obtain corresponding first absolute value result and gathered for amplitude；
Step 3.2, differential is carried out respectively to the zero dc shift sinusoidal signal sin1 and zero dc shift cosine signal cos1
Taken absolute value again after treatment, obtain corresponding second absolute value result carries out window comparing again, so as to obtain corresponding amplitude adopt
Collection trigger signal；
Step 3.3, according to corresponding amplitude trigger collection signal, real-time amplitude is carried out to corresponding first absolute value result respectively
Collection, so as to obtain the amplitude information of corresponding consecutive variations；
Step 3.4, by the zero dc shift sinusoidal signal sin1 and zero dc shift cosine signal cos1 respectively with it is corresponding
Amplitude information carries out division calculation, so as to sinusoidal signal sin2 and cosine signal cos2 after being corrected；
Step 4, treatment is orthogonalized to the sinusoidal signal sin2 and cosine signal cos2 after the correction, obtain it is strict just
Friendship, the sinusoidal signal sin and cosine signal cos that amplitude is equal, dc shift is zero.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107679777A (en) * | 2017-11-16 | 2018-02-09 | 哈尔滨理工大学 | Transmission of electricity quality evaluation segmented compensation parameter setting method based on division arithmetic |
| CN108204830A (en) * | 2017-11-28 | 2018-06-26 | 珠海格力节能环保制冷技术研究中心有限公司 | The compensation method of phase deviation and device |
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| CN116346558A (en) * | 2023-05-23 | 2023-06-27 | 清华大学 | Method and system for generating orthogonal signals |
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| CN107679777A (en) * | 2017-11-16 | 2018-02-09 | 哈尔滨理工大学 | Transmission of electricity quality evaluation segmented compensation parameter setting method based on division arithmetic |
| CN107679777B (en) * | 2017-11-16 | 2020-10-30 | 哈尔滨理工大学 | Power transmission quality evaluation segmented compensation parameter setting method based on division operation |
| CN108204830B (en) * | 2017-11-28 | 2019-08-06 | 珠海格力电器股份有限公司 | Phase deviation compensation method and device |
| CN108204830A (en) * | 2017-11-28 | 2018-06-26 | 珠海格力节能环保制冷技术研究中心有限公司 | The compensation method of phase deviation and device |
| US11125589B2 (en) | 2017-11-28 | 2021-09-21 | Gree Green Refrigeration Technology Center Co., Ltd. Of Zhuhai | Phase deviation compensation method and apparatus |
| CN109115533A (en) * | 2018-09-07 | 2019-01-01 | 天津福云天翼科技有限公司 | A kind of sine wave accurate reproducing method in real time |
| CN109115533B (en) * | 2018-09-07 | 2020-10-27 | 天津福云天翼科技有限公司 | Real-time accurate reproduction method of sine wave |
| CN111324925A (en) * | 2020-02-17 | 2020-06-23 | 中铁二院工程集团有限责任公司 | Method for judging overall rigidity of railway bridge |
| CN111324925B (en) * | 2020-02-17 | 2022-04-01 | 中铁二院工程集团有限责任公司 | Method for judging overall rigidity of railway bridge |
| CN112433471A (en) * | 2020-11-24 | 2021-03-02 | 北京麦格纳材科技有限公司 | High-precision self-gain compensation control method and control circuit thereof |
| CN112433471B (en) * | 2020-11-24 | 2021-09-21 | 北京麦格纳材科技有限公司 | High-precision self-gain compensation control method and control circuit thereof |
| CN113310396A (en) * | 2021-05-20 | 2021-08-27 | 西安电子科技大学 | Sine and cosine signal amplitude calculation circuit with double sampling structure |
| CN116346558A (en) * | 2023-05-23 | 2023-06-27 | 清华大学 | Method and system for generating orthogonal signals |
| CN116346558B (en) * | 2023-05-23 | 2023-08-22 | 清华大学 | Method and system for generating orthogonal signals |
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