CN104808059B - A kind of digital measuring method of electric signal instantaneous phase - Google Patents

A kind of digital measuring method of electric signal instantaneous phase Download PDF

Info

Publication number
CN104808059B
CN104808059B CN201410036900.1A CN201410036900A CN104808059B CN 104808059 B CN104808059 B CN 104808059B CN 201410036900 A CN201410036900 A CN 201410036900A CN 104808059 B CN104808059 B CN 104808059B
Authority
CN
China
Prior art keywords
integration
cycle
sampled
electric signals
digital
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
Application number
CN201410036900.1A
Other languages
Chinese (zh)
Other versions
CN104808059A (en
Inventor
戴尔晗
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Post and Telecommunication University
Original Assignee
Nanjing Post and Telecommunication University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nanjing Post and Telecommunication University filed Critical Nanjing Post and Telecommunication University
Priority to CN201410036900.1A priority Critical patent/CN104808059B/en
Publication of CN104808059A publication Critical patent/CN104808059A/en
Application granted granted Critical
Publication of CN104808059B publication Critical patent/CN104808059B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention discloses a kind of digital measuring method of electric signal instantaneous phase, continuous digital sampled signal is handled by the way of digital integration and interpolation, the zero point of electric signal is calculated according to the virtual time of origin of sampled value, the integration time started being calculated and the integration end point k obtained according to the mode of interpolation, frequency or the cycle of electric signal are calculated by the zero crossing of series of electrical signals, finally according to the time of the zero crossing of previous period electric signal, the cycle of the current cycle of prediction and current time, current instantaneous phase is calculated.It is especially applicable to the instantaneous phase measurement of alternating current, system detectio is convenient, and hardware spending is small；Advantages of simple is implemented simultaneously, and data are accurate, reliable；Precision, anti-interference in measurement etc. are greatly improved.

Description

A kind of digital measuring method of electric signal instantaneous phase
Technical field
The present invention relates to a kind of digital measuring method of electric signal instantaneous phase, the instantaneous of low-frequency signals is also applied for Phase measurement, belong to the technical field of signal detection.
Background technology
Usually need to measure the instantaneous phase of electric signal in daily life, production process, the instantaneous phase of measurement is more accurate Really, the effect of application is often more preferable.It is most of that certain is measured using zero traditional friendship method in existing method for measuring instantaneous phase The instantaneous phase of signal all the way, this algorithm are easily achieved, but the influence being easily interfered so that the precision of measurement compared with It is low.
The content of the invention
The technical problems to be solved by the invention be for electric signal in the prior art instantaneous phase measurement accuracy it is inadequate Accurately, it is proposed that a kind of digital measuring method of electric signal instantaneous phase, for zero more traditional friendship method, in measurement The inventions such as precision, anti-interference are greatly improved.
The present invention uses following technical scheme to solve above-mentioned technical problem：
A kind of digital measuring method of electric signal instantaneous phase, comprises the following steps：
Step 1）, tested electric signals are sampled, the sampled value of tested electric signals is obtained, then generates sampled signal；
Step 2), the zero crossing time series T after at least two cycles cross negative peak is obtained in analog or digital methodz1, Tz2,…,Tzk, k is the natural number more than 1；
Step 3）, it is determined that the starting point time T for calculating the jth zero crossing timesj, its calculation formula is Tsj= Tz(j-1)+ T × f, wherein：T is according to zero crossing Tz(j-1),Tz(j-2),…,Tz(j-k)The average period being calculated, parameter f ∈ (0.5,1), j are natural number and j>k；
Step 4）, in the sampled signal of tested electric signals, select the m samplings discharged in order on the sampling time Point, if the sampling time of this m sampled point is respectively t1、t2、...ti、ti+1、...tm, sampled value is respectively x1、x2、...xi、 xi+1...xm, wherein t1≤Tsj,t2>Tsj, i, m are natural number and 1≤i<m；
Step 5）, a numeral product is obtained by way of linear interpolation between the 1st sampled point and the 2nd sampled point Initial point s is separated, its coordinate is (xsj,Tsj)；Make SiFor digital integration starting point to the i-th sampled point (xi,ti) digital integration, then Si+1For digital integration starting point to i+1 sampled point (xi+1,ti+1) digital integration；Work as SiAnd Si+1Product be less than or equal to 0 When, a numeral is obtained by way of rectangle interpolation or trapezoidal interpolation between ith sample point and i+1 sampled point End point k is integrated, its coordinate is (xk,tk) so that the digital integration from digital integration starting point to integration end point is zero, meter Calculate the virtual time of origin t for drawing integration end point kk；
Step 6）, calculate the jth zero crossing time：
Step 7）, repeat step 3）To step 6）Obtain the zero crossing time of jth+1 Tz(j+1), then cycle of tested electric signals： Tpj=Tz(j+1)-Tzj, therefore obtain tested electric signals cycle be followed successively by Tp1,Tp2,Tp3,......Tp(n-1), n is oneself more than 1 So number；
Step 8）, according to step 7）The periodic sequence of the tested electric signals of acquisition, the prediction current cycle of tested electric signals Cycle Tp；
Step 9）, according to the time of the zero crossing of the previous period tested electric signals close to current time, step 8）In advance The cycle of the current cycle of tested electric signals of survey and current time, are calculated the current instantaneous phase of tested electric signals.
As the further prioritization scheme of the digital measuring method, step 1）It is described that tested electric signals are sampled It is that either constant duration does not sample for constant duration sampling.
As the further prioritization scheme of the digital measuring method, step 1）Described is sampled as to tested electric signals Complete cycle ripple sampled.
As the further prioritization scheme of the digital measuring method, the step 8）Comprise the following steps that：
According to step 7）The cycle of several cycles is followed successively by T before the tested electric signals being calculatedp(b-3),Tp(b-2), Tp(b-1),TpbThe cycle T of the current cycle of predictionpFor：Tp=K1×Tpb+K2×Tp(b-1)+K3×Tp(b-2)+K4×Tp(b-3)；Wherein, K1,K2,K3,K4For arbitrary constant, but condition K must be met1+K2+K3+K4=1, b are the positive integer more than 3.
As the further prioritization scheme of the digital measuring method, the step 9）Comprise the following steps that：If by The time for surveying the previous period zero crossing of electric signal is Tz, current time Tc, by step 8）Predict obtained tested electric signals The cycle of current cycle is Tp, then the current instantaneous phase of tested electric signals be expressed as with number of degrees value： Or it is expressed as with radian value：
As the further prioritization scheme of the digital measuring method, the digital integration is trapezoidal integration or rectangle Integration.
The present invention compared with prior art, has following technique effect using above technical scheme：
1）Traditional zero hands over two opposite continuity points of method symbolization to determine zero point and then determine the wink of electric signal Shi Xiangwei is easily low by the interference of harmonic wave, measurement error etc., measurement accuracy although algorithm clear physics conception.It is only accurate It is determined that position zero point, can just calculate accurate instantaneous phase.The characteristics of for most of electric signal being symmetrical, according to being calculated The integration time started carry out linear interpolation computing and choose a sampled point PSAs integration starting point, numeral product is carried out afterwards Point, obtained by way of interpolation one integration end point so that from integration starting point to integration end point digital integration be Zero, the zero point of electric signal is calculated by the sampling time of origin of integration starting point and the virtual time of origin of integration end point.It is determined that After the zero crossing of signal, frequency and the cycle of electric signal can be calculated.Finally according to the mistake of previous period electric signal The time of zero point, the cycle of the current cycle of prediction and current time, are calculated current instantaneous phase.Compared to more traditional Zero friendship method for, operand increased, but measure precision, anti-interference is greatly improved.
2）Sampling involved in the present invention can be constant duration sampling or constant duration does not sample, such as If fruit is constant duration sampling, then operand can be optimized and further reduce.
Brief description of the drawings
Fig. 1 be calculate obtain integration starting point after integration be calculated by the way of rectangular integration, rectangle interpolation terminate The virtual time of origin of point, and obtain the schematic diagram of zero crossing；
Fig. 2 be calculate obtain integration starting point after integration be calculated by the way of trapezoidal integration, trapezoidal interpolation terminate The virtual time of origin of point, and obtain the schematic diagram of zero crossing；
Fig. 3 be calculate obtain integration starting point after integration be calculated by the way of trapezoidal integration, rectangle interpolation terminate The virtual time of origin of point, and obtain the schematic diagram of zero crossing；
Fig. 4 is the zero crossing crossed using traditional zero cross point comparing method acquisition two after negative peak, calculates acquisition integration and opens The virtual time of origin of integration end point is calculated after initial point by the way of trapezoidal integration, trapezoidal interpolation, so as to obtain the 3rd The schematic diagram of individual zero crossing；
Fig. 5 is the zero crossing crossed using traditional zero cross point comparing method acquisition two after negative peak, calculates acquisition integration and opens The virtual time of origin of integration end point is calculated by the way of trapezoidal integration, trapezoidal interpolation after initial point, obtain the 10th, 11st, the schematic diagram of 12 zero crossings.
Fig. 6 calculates the schematic diagram of some sampled point instantaneous phase when being using trapezoidal integration, trapezoidal interpolation method；
Embodiment
Technical scheme is described in further detail below in conjunction with the accompanying drawings：
The essence of the present invention is that continuous digital sampled signal is handled by the way of digital integration and interpolation, to tested electricity Signal is sampled, and is obtained the sampled value of tested electric signals, is then generated sampled signal；Obtained at least in analog or digital method It's the zero crossing time after negative peak past two cycles；Linear interpolation computing is carried out according to the integration time started being calculated and chooses one Individual virtual sampled point PSAs integration starting point, there can be so continuous two points P in follow-up sampled pointiAnd Pi+1, such as Fruit is from PSTo PiDigital integration numerical value and from PSTo Pi+1Digital integration numerical value product be less than or equal to zero when, then can be in Pi And Pi+1Between an integration end point P is obtained by way of interpolationk,PkAcquisition condition be from PSTo PkDigital integration be 0.Then can be by PSVirtual time of origin and PkVirtual time of origin calculate electric signal zero point, by series of electrical signals Zero crossing calculates frequency or the cycle of electric signal.Here so-called digital integration has following several ways：Trapezoidal integration, rectangle product The mode of dividing.Finally according to the time of the zero crossing of previous period electric signal, prediction current cycle cycle and it is current when Between, current instantaneous phase is calculated.The P of selectionSZero point should not be got too close to, if easily made an uproar close to zero point The interference of sound causes measurement result not accurate enough.
To obtain more accurate measurement result, it is proposed that sampled point PSChoice be：Zero point should not be got too close to.
The features and advantages of the invention will be described in detail by example combination accompanying drawing.The principle of the present invention passes through measurement The instantaneous phase of some sampled point illustrates.
The specific implementation process of the present invention is as follows：
1st, tested electric signals are sampled, obtains the sampled value of tested electric signals, then generate sampled signal, here institute The sampling for being sampled as carrying out complete cycle ripple stated.Can be constant duration sampling or not constant duration sampling.；
2nd, the zero crossing time series T after at least two cycles cross negative peak is obtained in analog or digital methodz1,Tz2, Tz3...；
3rd, the starting point time T for calculating the jth zero crossing time is determinedsj, its calculation formula is Tsj=Tz(j-1)+T × f, wherein T are according to zero crossing Tz(j-1),Tz(j-2),Tz(j-3)... the average period being calculated, f ∈ (0.5,1)；
4th, in the sampled signal of tested electric signals, the m sampled points discharged in order on the sampling time are selected, if this The sampling time of m sampled point is respectively t1、t2、...ti、ti+1、...tm, sampled value is respectively x1、x2、...xi、xi+1...xm, Wherein t1≤Tsj,t2>Tsj, i, m are natural number and 1≤i<m；
5th, a digital integration is obtained by way of linear interpolation between the 1st sampled point and the 2nd sampled point to open Initial point s, its coordinate are (xsj,Tsj)；Make SiFor from digital integration starting point to the i-th sampled point (xi,ti) digital integration, then Si+1For from digital integration starting point to i+1 sampled point (xi+1,ti+1) digital integration；Work as SiAnd Si+1Product be less than or equal to When 0, a number is obtained by way of rectangle interpolation or trapezoidal interpolation between ith sample point and i+1 sampled point Word integrates end point k, and its coordinate is (xk,tk) so that the digital integration from digital integration starting point to integration end point is zero, Integration end point k virtual time of origin t is calculatedk；
6th, the jth zero crossing time is calculated：
7th, the concrete operations of zero crossing time are calculated and may refer to Fig. 1, Fig. 2, Fig. 3.Hollow triangle in figure represents product Separate initial point and integration end point.Fig. 1 is to be calculated to integrate the virtual of end point by the way of rectangular integration, rectangle interpolation Time of origin, and obtain the schematic diagram of zero crossing.From T in Fig. 1SStart digital integration, tkIt is the integration end point that interpolation obtains Virtual time of origin, from T in figureSTo tkDigital integration be 0.TzIt is to calculate the zero crossing obtained.Fig. 2 be using trapezoidal integration, The virtual time of origin of integration end point is calculated in the mode of trapezoidal interpolation, and obtains the schematic diagram of zero crossing.From T in Fig. 2S Start digital integration, tkIt is the virtual time of origin for the integration end point that interpolation obtains, from T in figureSTo tkDigital integration be 0. TzIt is to calculate the zero crossing obtained.Fig. 3 is to be calculated to integrate the virtual of end point by the way of trapezoidal integration, rectangle interpolation Time of origin, and obtain the schematic diagram of zero crossing.From T in Fig. 3SStart digital integration, tkIt is the integration end point that interpolation obtains Virtual time of origin, from T in figureSTo tkDigital integration be 0.TzIt is to calculate the zero crossing obtained.If purely inserted using trapezoidal Value method, that amount of calculation is bigger than normal be present when carrying out interpolation calculation.Fig. 3 uses trapezoidal integration when integration is started, But when carrying out interpolation arithmetic, the method that employs rectangle interpolation, the purpose for the arrangement is that reducing the complexity of computing.To take Accurate measurement result is obtained, the height that the rectangle is set in the calculating of accompanying drawing is the average value of two neighbouring sampled points. Tsi（That is T in figureS）It it is the integration time started being calculated, its calculation formula is Tsi=Tz(j-1)+(Tz(j-1)-Tz(j-2))× 0.89, i.e. f=0.89, T=(Tz(j-1)-Tz(j-2)), recommendation uses T=(Tz(j-1)-Tz(j-3))/2.Can also be in the following way： When calculating the integration time started, the zero crossing number obtained before is judged, if the zero crossing obtained before only has two It is individual, using T=(Tz(j-1)-Tz(j-2))；If the zero crossing obtained before is more than two, using T=(Tz(j-1)-Tz(j-3))/2。
8th, repeat the above steps, obtain several zero crossings time：Tz1,Tz2,Tz3...Tzj,Tz(j+1),Tz(j+2)...Tzn, Wherein, j=1,2 ... n, then tested electric signals cycle：Tpj=Tz(j+1)-Tzj, the frequency of tested electric signals is：
9th, simultaneously figure such as Fig. 4 of measurement frequency, figure calculate in each zero crossings after being sampled to electric signal 5.Fig. 4 is the zero crossing crossed using traditional zero cross point comparing method acquisition two after negative peak, is calculated after obtaining integration starting point The virtual time of origin of integration end point is calculated by the way of trapezoidal integration, trapezoidal interpolation, so as to obtain the 3rd zero passage The schematic diagram of point；Fig. 5 is the zero crossing crossed using traditional zero cross point comparing method acquisition two after negative peak, calculates and obtains integration The virtual time of origin of integration end point is calculated by the way of trapezoidal integration, trapezoidal interpolation after starting point, obtain the 10th, 11st, the schematic diagram of 12 zero crossings.Fig. 4 is to obtain two zero crossing T using traditional zero cross point comparing methodZ1、TZ2, by TZ1、TZ2Calculate and obtain TS3, afterwards in TS3Start a digital integration, in TE3Terminate integration, finally by TS3、TE3It is calculated TZ3.Fig. 5 is to calculate the schematic diagram for obtaining the 10th, 11,12 zero crossing, and the integration starting point being calculated on Fig. 5 and integration are tied Spot represents with hollow triangle, TZ10、TZ11And TZ12It is the 10th, 11 and 12 zero crossing being calculated.The then week of the signal Phase can be expressed as Tp10=TZ11-TZ10Or Tp11=TZ12-TZ11, frequency FpIt is then cycle TpInverse.Using rectangular integration, square Shape interpolation or trapezoidal integration, rectangle interpolation method calculate the figure summary for obtaining zero crossing and calculating frequency.
10th, one of measurement electric signal instantaneous phase is on condition that obtain the cycle of current cycle, but do not have in current cycle Before having end, the cycle of current cycle can not also directly obtain, it is contemplated that the cycle of electric signal（Frequency）It will not typically occur Change drastically, example of the invention employ a formula to predict the cycle T of current cyclep。
The formula is represented by：Tp=K1×Tpb+K2×Tp(b-1)+K3×Tp(b-2)+K4×Tp(b-3), when accompanying drawing is calculated Employ K1=2,K2=-1,K3=K4=0。
11st, the calculating of instantaneous phase can be found in Fig. 6.Fig. 6 calculates some when being using trapezoidal integration, trapezoidal interpolation method The schematic diagram of sampled point instantaneous phase.Calculate be sampled point S in Fig. 6 instantaneous phase, if in figure sampled point S sampling time It is Tc, the time of the zero crossing of the upper electric signal calculated is Tz, then sampled point S instantaneous phase be represented byT thereinpIt is the cycle for the current cycle of electric signal that previous prediction obtains.The result being calculated is to spend The phase value that number represents.The instantaneous phase of other sampled points in Fig. 6 can also use similar method to obtain.In one cycle The computational methods of the phase of arbitrfary point are same as above.Using rectangular integration, rectangle interpolation either using trapezoidal integration, rectangle interpolation side The schematic diagram that formula calculates the instantaneous phase at some time point omits.
Preferred scheme is that the described constant duration that is sampled as samples.
Traditional is disturbed with the zero crossing detection of level triggers by noise, it is impossible to the frequency of accurate measurement signal, Larger error be present；Traditional method that electric signal zero crossing is obtained using integration, this method is in sine of the measurement without harmonic wave During ripple signal frequency, precision is higher, but for the electric signal of harmonic wave be present, and integration starting point is affected by noise so as to causing There is also certain error for measurement result；Traditional digital frequency measuring method is influenceed by voltage measurement error, there is one Fixed error.Method described herein can overcome the double influence of harmonic wave and noise in electric signal, obtain more accurate phase Position measurement result.
In summary, the digital measuring method of a kind of electric signal instantaneous phase involved in the present invention, it is not necessary to by electricity Signal is converted into square wave, the shortcomings that overcoming traditional zero-crossing examination poor anti jamming capability, is particularly suitable for the wink of alternating current When phase measurement, system detectio is convenient, and hardware spending is small；The antijamming capability of system is stronger；Implement advantages of simple, data Accurately, reliably；There is wide application prospect.Certainly, the present invention can also be applied to the instantaneous phase survey of Low Frequency Sine Signals Amount.

Claims (6)

  1. A kind of 1. digital measuring method of electric signal instantaneous phase, it is characterised in that：Comprise the following steps：
    Step 1）, tested electric signals are sampled, the sampled value of tested electric signals is obtained, then generates sampled signal；
    Step 2), the zero crossing time series T after at least two cycles cross negative peak is obtained in analog or digital methodz1, Tz2,…,Tzk, k is the natural number more than 1；
    Step 3）, it is determined that the starting point time T for calculating the jth zero crossing timesj, its calculation formula is Tsj=Tz(j-1)+T × f, wherein：T is according to zero crossing Tz(j-1),Tz(j-2),…,Tz(j-k)The average period being calculated, parameter f ∈ (0.5,1), j For natural number and j>k；
    Step 4）, in the sampled signal of tested electric signals, the m sampled points discharged in order on the sampling time are selected, if The sampling time of this m sampled point is respectively t1、t2、...ti、ti+1、...tm, sampled value is respectively x1、x2、...xi、xi+ 1...xm, wherein t1≤Tsj,t2>Tsj, i, m are natural number and 1≤i<m；
    Step 5）, between the 1st sampled point and the 2nd sampled point obtaining a digital integration by way of linear interpolation opens Initial point s, its coordinate are (xsj,Tsj)；Make SiFor digital integration starting point to the i-th sampled point (xi,ti) digital integration, then Si+1 For digital integration starting point to i+1 sampled point (xi+1,ti+1) digital integration；Work as SiAnd Si+1Product be less than or equal to 0 when, A numeral product is obtained by way of rectangle interpolation or trapezoidal interpolation between ith sample point and i+1 sampled point Divide end point k, its coordinate is (xk,tk) so that the digital integration from digital integration starting point to integration end point is zero, is calculated Draw integration end point k virtual time of origin tk；
    Step 6）, calculate the jth zero crossing time：
    Step 7）, repeat step 3）To step 6）Obtain the zero crossing time of jth+1 Tz(j+1), then cycle of tested electric signals：Tpj= Tz(j+1)-Tzj, therefore obtain tested electric signals cycle be followed successively by Tp1,Tp2,Tp3,......Tp(n-1), n is the nature more than 1 Number；
    Step 8）, according to step 7）The periodic sequence of the tested electric signals of acquisition, predict the cycle T of the current cycle of tested electric signalsp
    Step 9）, according to the time of the zero crossing of the previous period tested electric signals close to current time, step 8）Prediction The cycle of the current cycle of tested electric signals and current time, the current instantaneous phase of tested electric signals is calculated.
  2. A kind of 2. digital measuring method of electric signal instantaneous phase according to claim 1, it is characterised in that：Step 1） It is described tested electric signals are carried out sampling be constant duration sampling either constant duration sample.
  3. A kind of 3. digital measuring method of electric signal instantaneous phase according to claim 1, it is characterised in that：Step 1） Described is sampled as sampling the complete cycle ripple of tested electric signals.
  4. A kind of 4. digital measuring method of electric signal instantaneous phase according to claim 1, it is characterised in that：The step Rapid 8）Comprise the following steps that：
    According to step 7）The cycle of several cycles is followed successively by T before the tested electric signals being calculatedp(b-3),Tp(b-2),Tp(b-1),Tpb The cycle T of the current cycle of predictionpFor：Tp=K1×Tpb+K2×Tp(b-1)+K3×Tp(b-2)+K4×Tp(b-3)；Wherein, K1,K2,K3, K4For arbitrary constant, but condition K must be met1+K2+K3+K4=1, b are the positive integer more than 3.
  5. A kind of 5. digital measuring method of electric signal instantaneous phase according to claim 1, it is characterised in that：The step Rapid 9）Comprise the following steps that：If the time of the previous period zero crossing of tested electric signals is Tz, current time Tc, by step Rapid 8）The cycle for predicting the obtained current cycle of tested electric signals is Tp, then the current instantaneous phase of tested electric signals is with number of degrees value It is expressed as：Or it is expressed as with radian value： <mrow> <msub> <mi>P</mi> <mi>c</mi> </msub> <mo>=</mo> <mn>2</mn> <mo>&amp;times;</mo> <mi>&amp;pi;</mi> <mo>&amp;times;</mo> <mfrac> <mrow> <msub> <mi>T</mi> <mi>c</mi> </msub> <mo>-</mo> <msub> <mi>T</mi> <mi>z</mi> </msub> </mrow> <msub> <mi>T</mi> <mi>p</mi> </msub> </mfrac> <mo>.</mo> </mrow> 1
  6. 6. a kind of digital measuring method of electric signal instantaneous phase according to any one of claim 1 to 5, its feature It is：The digital integration is trapezoidal integration or rectangular integration.
CN201410036900.1A 2014-01-26 2014-01-26 A kind of digital measuring method of electric signal instantaneous phase Active CN104808059B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410036900.1A CN104808059B (en) 2014-01-26 2014-01-26 A kind of digital measuring method of electric signal instantaneous phase

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410036900.1A CN104808059B (en) 2014-01-26 2014-01-26 A kind of digital measuring method of electric signal instantaneous phase

Publications (2)

Publication Number Publication Date
CN104808059A CN104808059A (en) 2015-07-29
CN104808059B true CN104808059B (en) 2017-12-08

Family

ID=53693059

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410036900.1A Active CN104808059B (en) 2014-01-26 2014-01-26 A kind of digital measuring method of electric signal instantaneous phase

Country Status (1)

Country Link
CN (1) CN104808059B (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101408568A (en) * 2007-10-12 2009-04-15 深圳科士达科技股份有限公司 Method and device for measuring electrical signal phase of alternating current
CN102095934A (en) * 2010-12-17 2011-06-15 南京邮电大学 Measuring method for phase difference of alternating current signals

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8553436B2 (en) * 2010-01-25 2013-10-08 Origin Electric Company, Limited Synchronization detecting circuit and automatic synchronous parallelization apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101408568A (en) * 2007-10-12 2009-04-15 深圳科士达科技股份有限公司 Method and device for measuring electrical signal phase of alternating current
CN102095934A (en) * 2010-12-17 2011-06-15 南京邮电大学 Measuring method for phase difference of alternating current signals

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
一种简单准确的电压型逆变器电压电流基波相位差检测方法;刘志刚 等;《电工技术杂志》;19970731(第4期);第16-17页第2节，图2 *

Also Published As

Publication number Publication date
CN104808059A (en) 2015-07-29

Similar Documents

Publication Publication Date Title
CN101806832B (en) Measuring method for frequencies of low-frequency signals
CN106679741B (en) Processing method and system based on vortex-shedding meter anti-jamming signal
CN102033161B (en) Frequency measuring method of alternating current signal
CN104391178B (en) A kind of time shift phase difference stable state harmonic signal bearing calibration based on Nuttall windows
CN103353550A (en) Method for measuring signal frequency and harmonic parameters of electric power system
CN106483374A (en) A kind of harmonic wave harmonic detection method based on Nuttall double window whole phase FFT
CN103399204A (en) Rife-Vincent (II) window interpolation FFT (Fast Fourier Transform)-based harmonic and inter-harmonic detection method
CN102809687B (en) Digital measurement method for alternating-current frequency
CN103983849B (en) A kind of Electric Power Harmonic Analysis method of real-time high-precision
CN106018958A (en) Current voltage frequency tracking method of secondary side in isolated grid frequency conversion system
CN110031680A (en) A kind of system side harmonic impedance estimation method and system
CN104808060B (en) A kind of digital measuring method of electrical signal phase difference
CN102095929A (en) Method for rapidly measuring frequency of alternating-current signals
CN103969508A (en) Real-time high-precision power harmonic analysis method and device
CN103543331B (en) A kind of method calculating electric signal harmonic wave and m-Acetyl chlorophosphonazo
CN110068729B (en) Signal phasor calculation method
CN104808055B (en) A kind of digital measuring method of signal frequency
CN102778606B (en) Digital measurement method for instantaneous phase of alternating current
CN104808059B (en) A kind of digital measuring method of electric signal instantaneous phase
CN103575979A (en) Method for digital measuring of alternating current frequency
CN103605904B (en) Self compensation power system amplitude arithmetic based on error estimation
CN107942139A (en) A kind of novel electric power harmonic parameters synchronous sampling by software method
CN106405203A (en) Least square method-based single phase voltage drop detection method
CN106053940A (en) Novel harmonic wave analysis method based on square wave Fourier series decomposition
CN104808058B (en) A kind of measuring method of electric signal instantaneous phase

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
EXSB Decision made by sipo to initiate substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
EE01 Entry into force of recordation of patent licensing contract
EE01 Entry into force of recordation of patent licensing contract

Application publication date: 20150729

Assignee: Zhangjiagang Institute of Zhangjiagang

Assignor: NANJING University OF POSTS AND TELECOMMUNICATIONS

Contract record no.: X2020980007094

Denomination of invention: A digital measurement method for instantaneous phase of electrical signal

Granted publication date: 20171208

License type: Common License

Record date: 20201026