CN109188076A - Frequency measurement device, method, apparatus and storage medium - Google Patents
Frequency measurement device, method, apparatus and storage medium Download PDFInfo
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- CN109188076A CN109188076A CN201811139423.6A CN201811139423A CN109188076A CN 109188076 A CN109188076 A CN 109188076A CN 201811139423 A CN201811139423 A CN 201811139423A CN 109188076 A CN109188076 A CN 109188076A
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
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Abstract
The application provides a device, a method, equipment and a storage medium for frequency measurement, and relates to the technical field of electric power. Apparatus for frequency measurement, comprising: the interference judging module is used for receiving a signal to be judged of the power system, judging whether the power system is disturbed or not according to the signal to be judged, outputting a first signal if the power system is not disturbed, and outputting a second signal if the power system is disturbed; the frequency acquisition module is used for acquiring frequency information based on the electrical signal and outputting the frequency information; and the retainer is respectively in communication connection with the interference judging module and the frequency acquiring module and receives the output frequency information and the output signal, outputs the frequency information received in the current period if receiving the first signal, and outputs the frequency information received in the previous period without disturbance if receiving the second signal. By the aid of the technical scheme, the accuracy of signal frequency measurement of the power system can be improved.
Description
Technical field
The present invention relates to technical field of electric power more particularly to a kind of device of frequency measurement, method, equipment and storage to be situated between
Matter.
Background technique
With the continuous development of new energy, new energy power station has more and more been entered in electric system.New energy electricity
After extensive access electric system of standing, also to the safe and stable of electric system and challenge that efficient operation bring is new.In order to protect
Demonstrate,prove the safe and stable and efficient operation of electric system, it is desirable that new energy power station can realize inertia, damping response, primary frequency modulation, fast
Speed cuts the functions such as machine, fast speed limit power and fast reactive adjusting.Above-mentioned function is required to corresponding in electric system
Signal frequency is accurately measured.
At this stage, by the original signal in acquisition electric system, the signal frequency of original signal is measured.But work as electric power
When system jam or interference, adverse effect can be brought to the measurement of the signal frequency of original signal.Cause to original signal
The accuracy of measurement of signal frequency be greatly lowered.
Summary of the invention
The embodiment of the invention provides a kind of device of frequency measurement, method, equipment and storage mediums, can be improved to electricity
The accuracy of the signal frequency measurement of Force system.
In a first aspect, the embodiment of the invention provides a kind of devices of frequency measurement, comprising: determining interference module is used for
The signal to be judged of electric system is received, and according to signal to be judged, judges whether electric system disturbs, and, if sentencing
Determine electric system not disturb, export the first signal, if it is determined that electric system disturbs, second signal is exported, wait judge
Signal is used to characterize the feature of the electric signal of electric system；Frequency acquisition module, frequency acquisition module are used for based on electrical letter
Number, obtain frequency information, and output frequency information；Retainer, retainer respectively with determining interference module and frequency acquisition module
Frequency information and signal are communicated to connect and received, if receiving the first signal, the received frequency information of current period is exported, if connecing
Receive second signal, a upper period received frequency information that output power system does not disturb.
In some embodiments of first aspect, signal to be judged includes the shape information of electric signal, determining interference mould
If the shape information that block is specifically used for electric signal exceeds arm's length standard range of waveforms, determine that electric system disturbs；Alternatively,
Signal to be judged includes the frequency information of electric signal, if the frequency information that determining interference module is specifically used for electric signal exceeds
Arm's length standard frequency range determines that electric system disturbs；Alternatively, signal to be judged include electric signal shape information and
The frequency information of electric signal, if the shape information that determining interference module is specifically used for electric signal exceeds arm's length standard waveform model
It encloses, and/or, the frequency information of electric signal exceeds arm's length standard frequency range, determines that electric system disturbs.
In some embodiments of first aspect, signal to be judged includes the shape information of electric signal；Device further include:
First conditioning circuit, the first conditioning circuit are connect with determining interference module, and the first conditioning circuit is used to receive electric signal, and right
Electric signal is improved, and the shape information of electric signal is obtained.
In some embodiments of first aspect, signal to be judged includes the frequency information of electric signal；Frequency acquisition mould
Block is also connect with determining interference module.
In some embodiments of first aspect, frequency acquisition module includes: the second conditioning circuit, and the second conditioning circuit is used
In reception electric signal, and electric signal is improved；Frequency computing unit, frequency computing unit and the second conditioning circuit,
Retainer connection, frequency computing unit are used to calculate the frequency information of the electric signal after conditioning.
In some embodiments of first aspect, frequency computing unit includes: zero-crossing comparator, zero-crossing comparator and second
Conditioning circuit, the connection of frequency calculation circuit chip, zero-crossing comparator are used to convert square wave for the electric signal after conditioning；Frequency
Counting circuit chip, frequency calculation circuit chip are connect with retainer, square wave of the frequency calculation circuit chip based on conversion, will be square
Frequency information of the frequency information of wave as the electric signal after conditioning.
In some embodiments of first aspect, frequency computing unit includes: frequency computing chip, frequency computing chip with
Second conditioning circuit, retainer connection, frequency computing chip are stored with signal frequency algorithm, frequency computing chip run signal frequency
Rate algorithm be calculated conditioning after electric signal frequency information.
In some embodiments of first aspect, device further include: memory, memory are connect with retainer, memory
For recording the frequency information of each received electric signal of period retainer.
Second aspect, the embodiment of the invention provides a kind of methods of frequency measurement, comprising: based on the electrical of electric system
Signal obtains the frequency information of electric signal；Signal to be judged is received, according to signal to be judged, judges whether electric system is sent out
Raw disturbance, signal to be judged are used to characterize the feature of electric signal；If it is determined that electric system does not disturb, output is current outward
The frequency information of period received electric signal；If it is determined that electric system disturbs, outside output power system is not disturbed
The frequency information of a dynamic upper period received electric signal.
In some embodiments of second aspect, signal to be judged includes the shape information or electric signal of electric signal
Frequency information；According to signal to be judged, judge whether electric system disturbs, comprising: if the shape information of electric signal is super
Arm's length standard range of waveforms out determines that electric system disturbs；If the shape information of electric signal is without departing from arm's length standard wave
Shape range determines that electric system does not disturb；Alternatively, if the frequency information of electric signal exceeds arm's length standard frequency range,
Determine that electric system disturbs；If the frequency information of electric signal determines electric system without departing from arm's length standard frequency range
It does not disturb.
In some embodiments of second aspect, signal to be judged includes the shape information of electric signal；According to wait judge
Signal, judges whether electric system disturbs, comprising: if the shape information of electric signal exceeds arm's length standard range of waveforms,
Determine that electric system disturbs；If the shape information of electric signal determines electric system without departing from arm's length standard range of waveforms
It does not disturb；Alternatively, signal to be judged includes the frequency information of electric signal；According to signal to be judged, electric system is judged
Whether disturb, comprising: if the frequency information of electric signal exceeds arm's length standard frequency range, determine that electric system is disturbed
It is dynamic；If the frequency information of electric signal without departing from arm's length standard frequency range, determines that electric system does not disturb；Alternatively, to
Judge that signal includes the shape information of electric signal and the frequency information of electric signal；According to signal to be judged, power train is judged
Whether system disturbs, comprising: if the shape information of electric signal exceeds arm's length standard range of waveforms, and/or, electric signal
Frequency information exceeds arm's length standard frequency range, determines that electric system disturbs；If the shape information of electric signal without departing from
Arm's length standard range of waveforms, and the frequency information of electric signal determines that electric system is not sent out without departing from arm's length standard frequency range
Raw disturbance.
The third aspect, the embodiment of the invention provides a kind of equipment of frequency measurement, comprising: memory and processor；It deposits
Reservoir is for storing executable program code；Processor is for reading the executable program code stored in memory to execute
The method for stating the frequency measurement in technical solution.
Fourth aspect is stored with computer program on storage medium and refers to the embodiment of the invention provides a kind of storage medium
It enables；The frequency measurement method in above-mentioned technical proposal is realized when computer program instructions are executed by processor.
The embodiment of the invention provides a kind of device of frequency measurement, method, equipment and storage medium, frequency acquisition modules
The frequency information of the electric signal of electric system is provided for retainer.In determining interference module according to the feature of characterization electric signal
Signal to be judged, in the case where determining that electric system do not disturb, provided using the first signal notice retainer current
The frequency information of the electric signal in period.In determining interference module according to the signal to be judged of the feature of characterization electric signal, sentence
Determine in the case that electric system disturbs, using second signal notice retainer provide electric system do not disturb it is upper
The frequency information of the electric signal in one period.To avoid externally exporting disturbed in the case where electric system disturbs
The frequency information of the electric signal of influence, improves the accuracy of the frequency information of the electric signal externally exported, to improve
Accuracy to the signal frequency measurement of electric system.
Detailed description of the invention
The present invention may be better understood from the description with reference to the accompanying drawing to a specific embodiment of the invention wherein,
The same or similar appended drawing reference indicates the same or similar feature.
Fig. 1 is a kind of structural schematic diagram of the device of frequency measurement in one embodiment of the invention；
Fig. 2 is a kind of structural schematic diagram of the device of frequency measurement in another embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of the device of frequency measurement in further embodiment of this invention；
Fig. 4 is a kind of flow chart of the method for frequency measurement in the embodiment of the present invention.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below.In following detailed description
In, many details are proposed, in order to provide complete understanding of the present invention.But to those skilled in the art
It will be apparent that the present invention can be implemented in the case where not needing some details in these details.Below to implementation
The description of example is used for the purpose of providing by showing example of the invention and better understanding of the invention.The present invention never limits
In any concrete configuration set forth below and algorithm, but cover under the premise of without departing from the spirit of the present invention element,
Any modification, replacement and the improvement of component and algorithm.In the the accompanying drawings and the following description, well known structure and skill is not shown
Art is unnecessary fuzzy to avoid causing the present invention.
Fig. 1 is a kind of structural schematic diagram of the device of frequency measurement in one embodiment of the invention, as shown in Figure 1, frequency is surveyed
The device of amount includes determining interference module 11, frequency acquisition module 12 and retainer 13.
Determining interference module 11 is used to receive the signal to be judged of electric system, and according to signal to be judged, judges electric power
Whether system disturbs.The feature of the electric signal of characterization electric system to be judged.For example, signal to be judged can be
The frequency information of electric signal, the cycle information of electric signal, shape information of electric signal etc., do not limit herein.
Wait judge signal can by electric system electric signal it is processed after obtain, signal to be judged can indicate electrically to believe
Number.It should be noted that electric signal, which can be regarded as any a part in electric system, needs detected signal.For example, electric
Gas signal can be the tach signal of generators in power systems, can obtain the frequency of generator according to the tach signal of generator.
The electric signal obtained can be selected to carry out frequency measurement, do not limited herein according to specific works scene and work requirements.
In some instances, above-mentioned signal to be judged may include the shape information of electric signal.Above-mentioned determining interference module
If 11 shape informations that can be specifically used for electric signal exceed arm's length standard range of waveforms, determine that electric system disturbs.Wave
Shape information can indicate the waveform of electric signal.For example, shape information can be the waveform image of electric signal, it can be electric signal
Amplitude, the period of waveform etc., do not limit herein.The wave for the electric signal that arm's length standard range of waveforms characterization does not disturb
The range of shape information can set according to operative scenario, work requirements and experience, not limit herein.
It should be noted that under conditions of signal to be judged includes the shape information of electric signal, signal table to be judged
The corresponding electric signal of the feature of the electric signal of sign and frequency acquisition module 12 are for obtaining in the frequency information of electric signal
Electric signal be same signal.
In other examples, above-mentioned signal to be judged may include the frequency information of electric signal.Above-mentioned determining interference mould
If the frequency information that block 11 can be specifically used for electric signal exceeds arm's length standard frequency range, determine that electric system disturbs.
Frequency information can indicate the frequency of electric signal, not limit the specific manifestation form of frequency information herein.Arm's length standard frequency
The range of the frequency information for the electric signal that range characterization does not disturb, can set according to operative scenario, work requirements and experience
It is fixed, it does not limit herein.
It should be noted that signal to be judged include electric signal frequency information under conditions of, characterization to be judged
Electric signal the corresponding electric signal of feature and frequency acquisition module 12 for obtaining in the frequency information of electric signal
Electric signal is same signal.
In other example, above-mentioned signal to be judged may include the shape information of electric signal and the frequency of electric signal
Information.If above-mentioned determining interference module 11 is specifically used for the shape information of electric signal beyond arm's length standard range of waveforms, and/
Or, the frequency information of electric signal exceeds arm's length standard frequency range, determine that electric system disturbs.That is, electrical
In the shape information of signal and the frequency information of electric signal at least one not in corresponding normal range (NR), determine power train
System disturbs.In this example, dual judgement can more accurately determine that electric system disturbs, and lower the possibility of erroneous judgement
Property, to further increase the accuracy of judgement, improve the reliability and safety of electric system.
It is noted that if above-mentioned signal to be judged may include the frequency information of electric signal, the frequency of the electric signal
Rate information can be supplied to determining interference module 11 by frequency acquisition module 12.That is, the output end of frequency acquisition module 12
It can be connect with the input terminal of determining interference module 11.
It should be noted that signal to be judged includes the item of the shape information of electric signal and the frequency information of electric signal
Under part, the corresponding electric signal of feature and frequency acquisition module 12 of characterization electric signal to be judged are electrical for obtaining
Electric signal in the frequency information of signal is same signal.
Determining interference module 11 is also used to if it is determined that electric system does not disturb, exports the first signal.And interference is sentenced
Cover half block 11 is also used to if it is determined that electric system disturbs, and exports second signal.Wherein, the first signal and second signal are not
Same signal.Here output refers to output to retainer 13.
Frequency acquisition module 12 is used to be based on electric signal, obtains the frequency information of electric signal, and by electric signal
Frequency information output.Specifically, frequency acquisition module 12 can periodically export the frequency information of electric signal to retainer
13。
In some instances, certain processing, such as the calculating of signal condition, frequency etc. can be carried out to electric signal, obtained
The frequency information of electric signal.
Retainer 13 is communicated to connect with determining interference module 11 and frequency acquisition module 12 respectively, and can receive frequency information
With signal (i.e. the first signal or second signal).Specifically, the output end of frequency acquisition module 12 can be with the first of retainer 13
Input terminal connection.Retainer 13 and determining interference module 11 can wired connection, can also be wirelessly connected, not limit herein.If protecting
Holder 13 and 11 wired connection of determining interference module, the then output end of the second input terminal of retainer 13 and determining interference module 11
Connection.
If retainer 13 is also used to receive the first signal, the frequency information of the received electric signal of current period is exported.
Retainer 13 receives the first signal, indicates that electric system does not disturb.The frequency letter of the electric signal of current period at this time
It is more accurate to cease, it is possible to provide output operates for being tested, being controlled, adjusted etc..
If retainer 13 is also used to receive second signal, the upper period that output power system does not disturb is received
The frequency information of electric signal.Retainer 13 receives second signal, indicates that electric system disturbs.Current period at this time
The frequency information of electric signal has been received by disturbing influence, is inaccurate.Therefore, it is received electrical to export a upper period for retainer 13
The frequency information of signal.It should be noted that guarantee here if it is determined that current period electric system disturbs, retainer 13
The frequency information of a upper period received electric signal of output will guarantee that upper cycle power system does not disturb.If upper one
Cycle power system also disturbs, then continues to recall, until it is received to obtain the upper period that electric system does not disturb
The frequency information of electric signal.
When the failures such as ground fault, high voltage disturbance, short circuit, overvoltage or problem occur for electric system, electric system
It can disturb.Disturbance will affect electric signal, to cause the frequency information accuracy rate decline of the measurement output of electric signal.
The operations such as frequency information participation test, control, adjusting using accuracy rate decline, can tie test result, control result, adjusting
Fruit etc. brings very big adverse effect.
In embodiments of the present invention, frequency acquisition module 12 is that retainer 13 provides the frequency information of electric signal.Dry
Determination module 11 is disturbed according to the signal to be judged for the feature that can characterize electric signal, determines that there is a situation where disturb for electric system
Under, the frequency information of the electric signal of current period is provided using the first signal notice retainer 13.In determining interference module
11 according to the signal to be judged of the feature that can characterize electric signal, in the case where determining that electric system disturbs, available the
Binary signal notice retainer 13 provided the frequency information of the electric signal in the upper period that electric system does not disturb.To keep away
Exempt from the frequency information for externally exporting the electric signal of disturbed influence in the case where electric system disturbs, improves pair
The accuracy of the frequency information of the electric signal of outer output, to improve the accurate of the signal frequency measurement to electric system
Degree.
Fig. 2 is a kind of structural schematic diagram of the device of frequency measurement in another embodiment of the present invention.In signal packet to be judged
In the case where the shape information for including electric signal, as shown in Fig. 2, the device of frequency measurement may also include on the basis of Fig. 1
One conditioning circuit 14.Said frequencies, which obtain module 12, may also include the second conditioning circuit 121 and frequency computing unit 122.
First conditioning circuit 14 is connect with determining interference module 11.Specifically, the output end of the first conditioning circuit 14 and dry
Disturb the input terminal connection of determination module 11.First conditioning circuit 14 improves electric signal for receiving electric signal,
Obtain the shape information of electric signal.
Wherein, the first conditioning circuit 14 can carry out electric signal the conditioning such as to stablize, amplify, so that is obtained is electrical
The shape information of signal more has identification, easily facilitates analysis.Here it the specific structure to the first conditioning circuit 14 and is adopted
Specific component and without limitation.
Second conditioning circuit 121 improves electric signal for receiving electric signal.Specifically, the second conditioning
Circuit 121 can carry out electric signal the conditioning such as to stablize, amplify, so that the electric signal after conditioning more has identification, more just
In analysis.
Frequency computing unit 122 is connect with the second conditioning circuit 121, retainer 13.Specifically, frequency computing unit 122
Input terminal connect with the output end of the second conditioning circuit 121, the input of the output end of frequency computing unit 122 and retainer 13
End connection.Frequency computing unit 122 is used to calculate the frequency information of the electric signal after conditioning.
In some instances, frequency computing unit 122 may include zero-crossing comparator and frequency calculation circuit chip.Zero passage ratio
It is connect compared with device with the second conditioning circuit, frequency calculation circuit chip.Frequency calculation circuit chip is connect with retainer.Specifically,
The input terminal of zero-crossing comparator is connect with the output end of the second conditioning circuit 121.The output end and frequency of zero-crossing comparator calculate
The input terminal of circuit chip connects.The output end of frequency calculation circuit chip is connect with the input terminal of retainer 13.Zero-cross comparator
Device can convert square wave for the electric signal after conditioning.By the square wave input frequency calculation circuit chip of conversion, frequency calculates electricity
Square wave of the road chip based on conversion, using the frequency information of square wave as the frequency information of the electric signal after conditioning.Specifically, frequency
The period of the square wave of the statistics available conversion of rate counting circuit chip, and the period of the square wave using conversion, the side of conversion is calculated
The frequency information of wave.The frequency information of the square wave of conversion is the frequency information of the electric signal after improving.
In other examples, frequency computing unit 122 may include frequency computing chip, can in advance calculate signal frequency
In method write frequency computing chip, i.e., signal frequency algorithm is stored in frequency computing chip.Electric signal input after conditioning
Frequency computing chip, frequency computing chip run signal frequency algorithm are believed with the frequency that the electric signal after conditioning is calculated
Breath.
Frequency information or the electric system of the received electric signal of current period can be exported outward for the ease of retainer 13
The frequency information for a upper period received electric signal not disturbed, settable memory (not shown in FIG. 2) are remembered
Record the frequency information of the received electric signal of each period retainer 13.Memory is connect with retainer 13.Specifically, memory
It can be integrally disposed with retainer 13.Memory can also be separately positioned with retainer 13, does not limit herein.
Fig. 3 is a kind of structural schematic diagram of the device of frequency measurement in further embodiment of this invention.In signal packet to be judged
In the case where the frequency information for including electric signal, as shown in figure 3, on the basis of Fig. 1, said frequencies obtain module 12 can also be with
Determining interference module 11 connects, to provide the frequency information of electric signal for determining interference module 11, as signal to be judged.Tool
Body, the output end of frequency acquisition module 12 is connect with the input terminal of determining interference module 11.
In some instances, the device of frequency measurement may include the first conditioning circuit 14, the frequency acquisition module 12 in Fig. 3
It can also be as shown in Fig. 2, including the second conditioning circuit 121 and frequency computing unit 122.Second conditioning circuit 121 and frequency calculate
The concrete function and specific structure of unit 122 can be found in the related content in above-described embodiment, and details are not described herein.It is worth mentioning
, the output end of frequency computing unit 122 can connect with the input terminal of determining interference module 11.In some instances, frequency
The output end of frequency calculation circuit chip in computing unit 122 can also be connect with determining interference module 11.
In some instances, it may also set up memory (not shown in FIG. 3) to record each period retainer 13 and receive
Electric signal frequency information.The related description of memory can be found in above-described embodiment, and details are not described herein.
It should be noted that in the device of frequency measurement shown in Fig. 3, if signal to be judged includes the wave of electric signal
The frequency information of shape information and electric signal.The input terminal of determining interference module 11 has accessed two paths of signals, all the way electrically to believe
Number shape information, another way be electric signal frequency information.
Fig. 4 is a kind of flow chart of the method for frequency measurement in the embodiment of the present invention.As shown in figure 4, the side of frequency measurement
Method may include step S201 to step S204.
In step s 201, based on the electric signal of electric system, the frequency information of electric signal is obtained.
In step S202, signal to be judged is received, according to signal to be judged, judges whether electric system disturbs.
Wherein, signal to be judged is used to characterize the feature of electric signal.
In some instances, signal to be judged includes the shape information of electric signal.Then step S202 can be refined are as follows: be received
The shape information of electric signal, judges whether the shape information of electric signal exceeds arm's length standard range of waveforms.In this example,
If the shape information of electric signal exceeds arm's length standard range of waveforms, determine that electric system disturbs.If the wave of electric signal
Shape information determines that electric system does not disturb without departing from arm's length standard range of waveforms.
In other examples, signal to be judged includes the frequency information of electric signal.Then step S202 can be refined are as follows: be connect
The frequency information for receiving electric signal, judges whether the frequency information of electric signal exceeds arm's length standard frequency range.In this example
In, if the shape information of electric signal exceeds arm's length standard frequency range, determine that electric system disturbs.If electric signal
Frequency information determines that electric system does not disturb without departing from normal mark frequency range.
In other example, signal to be judged includes the shape information of electric signal and the frequency information of electric signal.
Step S202 can be refined are as follows: received the shape information of electric signal or the frequency information of electric signal, judged the wave of electric signal
Whether shape information exceeds arm's length standard range of waveforms and whether the frequency information of electric signal exceeds arm's length standard frequency model
It encloses.In this example, if the shape information of electric signal exceeds arm's length standard range of waveforms, and/or, the frequency letter of electric signal
Breath exceeds arm's length standard frequency range, determines that electric system disturbs.If the shape information of electric signal is without departing from normal mark
Waveform range, and the frequency information of electric signal determines that electric system does not disturb without departing from arm's length standard frequency range.
In step S203, if it is determined that electric system does not disturb, the received electric signal of current period is exported outward
Frequency information.
In step S204, if it is determined that electric system disturbs, outside output power system do not disturb upper one
The frequency information of period received electric signal.
The related content of step S201 to step S204 refer to the correlation in the embodiment of the device of said frequencies measurement
Illustrate, details are not described herein.
In embodiments of the present invention, according to signal to be judged relevant to electric signal, determine that electric system does not occur
In the case where disturbance, the frequency information of the electric signal of current period is externally provided.According to relevant to electric signal wait sentence
Break signal can externally provide the upper period that electric system does not disturb in the case where determining that electric system disturbs
The frequency information of electric signal.To avoid externally exporting the electricity of disturbed influence in the case where electric system disturbs
The frequency information of gas signal, improves the accuracy of the frequency information of the electric signal externally exported, to improve to electric power
The accuracy of the signal frequency measurement of system.
One embodiment of the application additionally provides a kind of equipment of frequency measurement, which includes memory and processor.It deposits
Reservoir can be used for storing executable program code.Processor is for reading the executable program code stored in memory to execute
The method of frequency measurement in above-described embodiment.
One embodiment of the application also provides a kind of storage medium, is stored with computer program instructions on the storage medium, should
Computer program instructions can realize the frequency measurement in above-described embodiment method when being executed by processor.
Functional block shown in structures described above block diagram can be implemented as hardware, software, firmware or their group
It closes.When realizing in hardware, it may, for example, be electronic circuit, specific integrated circuit (ASIC), firmware appropriate, insert
Part, function card etc..When being realized with software mode, element of the invention is used to execute program or the generation of required task
Code section.Perhaps code segment can store in machine readable media program or the data-signal by carrying in carrier wave is passing
Defeated medium or communication links are sent." machine readable media " may include any medium for capableing of storage or transmission information.
The example of machine readable media includes electronic circuit, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), soft
Disk, CD-ROM, CD, hard disk, fiber medium, radio frequency (RF) link, etc..Code segment can be via such as internet, inline
The computer network of net etc. is downloaded.
Claims (12)
1. a kind of device of frequency measurement characterized by comprising
Determining interference module judges the electricity for receiving the signal to be judged of electric system, and according to the signal to be judged
Whether Force system disturbs, and, if it is determined that the electric system does not disturb, the first signal is exported, if it is determined that described
Electric system disturbs, and exports second signal, and the signal to be judged is used to characterize the electric signal of the electric system
Feature；
Frequency acquisition module, the frequency acquisition module are used to be based on the electric signal, obtain frequency information, and described in output
Frequency information；
Retainer, the retainer communicate to connect with the determining interference module and the frequency acquisition module respectively and receive institute
Frequency information and signal are stated, if receiving first signal, the received frequency information of current period is exported, if receiving
The second signal, the received frequency information of the upper period that output power system does not disturb.
2. the apparatus according to claim 1, which is characterized in that the signal to be judged includes the waveform of the electric signal
Information is sentenced if the shape information that the determining interference module is specifically used for the electric signal exceeds arm's length standard range of waveforms
The fixed electric system disturbs；
Alternatively,
The signal to be judged includes the frequency information of the electric signal, if the determining interference module is specifically used for the electricity
The frequency information of gas signal exceeds arm's length standard frequency range, determines that the electric system disturbs；
Alternatively,
The signal to be judged includes the shape information of the electric signal and the frequency information of the electric signal, the interference
If the shape information that determination module is specifically used for the electric signal exceeds arm's length standard range of waveforms, and/or, the electrical letter
Number frequency information exceed arm's length standard frequency range, determine that the electric system disturbs.
3. the apparatus according to claim 1, which is characterized in that the signal to be judged includes the waveform of the electric signal
Information；Described device further include:
First conditioning circuit, first conditioning circuit are connect with the determining interference module, and first conditioning circuit is used for
The electric signal is received, and the electric signal is improved, obtains the shape information of the electric signal.
4. the apparatus according to claim 1, which is characterized in that the signal to be judged includes the frequency of the electric signal
Information；The frequency acquisition module is also connect with the determining interference module.
5. device according to claim 1 or 4, which is characterized in that the frequency acquisition module includes:
Second conditioning circuit, second conditioning circuit adjust the electric signal for receiving the electric signal
Reason；
Frequency computing unit, the frequency computing unit are connect with second conditioning circuit, the retainer, the frequency meter
Calculate the frequency information that unit is used to calculate the electric signal after conditioning.
6. device according to claim 5, which is characterized in that the frequency computing unit includes:
Zero-crossing comparator, the zero-crossing comparator are connect with second conditioning circuit, frequency calculation circuit chip, the zero passage
Comparator is used to convert square wave for the electric signal after conditioning；
The frequency calculation circuit chip, the frequency calculation circuit chip are connect with the retainer, and the frequency calculates electricity
The square wave of the road chip based on conversion is believed the frequency information of the square wave as the frequency of the electric signal after conditioning
Breath.
7. device according to claim 5, which is characterized in that the frequency computing unit includes:
Frequency computing chip, the frequency computing chip are connect with second conditioning circuit, the retainer, the frequency meter
It calculates chip and is stored with signal frequency algorithm, after the frequency computing chip runs the signal frequency algorithm so that conditioning is calculated
The electric signal frequency information.
8. the apparatus according to claim 1, which is characterized in that described device further include:
Memory, the memory are connect with the retainer, and the memory connects for recording retainer described in each period
The frequency information for the electric signal received.
9. a kind of method of frequency measurement characterized by comprising
Electric signal based on electric system obtains the frequency information of the electric signal；
Signal to be judged is received, according to the signal to be judged, judges whether the electric system disturbs, it is described wait judge
Signal is used to characterize the feature of the electric signal；
If it is determined that the electric system does not disturb, the frequency letter of the received electric signal of current period is exported outward
Breath；
If it is determined that the electric system disturbs, the upper period that outside output power system does not disturb is received described
The frequency information of electric signal.
10. according to the method described in claim 9, it is characterized in that, the signal to be judged includes the wave of the electric signal
Shape information；The signal to be judged according to, judges whether the electric system disturbs, comprising: if the electrical letter
Number shape information exceed arm's length standard range of waveforms, determine that the electric system disturbs；If the wave of the electric signal
Shape information determines that the electric system does not disturb without departing from arm's length standard range of waveforms；
Alternatively,
The signal to be judged includes the frequency information of the electric signal；The signal to be judged according to, described in judgement
Whether electric system disturbs, comprising: if the frequency information of the electric signal exceeds arm's length standard frequency range, determines institute
Electric system is stated to disturb；If the frequency information of the electric signal determines the electricity without departing from arm's length standard frequency range
Force system does not disturb；
Alternatively, the signal to be judged includes the shape information of the electric signal and the frequency information of the electric signal；Institute
It states according to the signal to be judged, judges whether the electric system disturbs, comprising: if the waveform of the electric signal is believed
Breath exceeds arm's length standard range of waveforms, and/or, the frequency information of the electric signal exceeds arm's length standard frequency range, determines
The electric system disturbs；If the shape information of the electric signal is without departing from the arm's length standard range of waveforms, and institute
The frequency information of electric signal is stated without departing from the arm's length standard frequency range, determines that the electric system does not disturb.
11. a kind of equipment of frequency measurement characterized by comprising memory and processor；
The memory is for storing executable program code；
The processor is used to read the executable program code stored in the memory and is required described in 9 or 10 with perform claim
Frequency measurement method.
12. a kind of storage medium, which is characterized in that be stored with computer program instructions on the storage medium；The computer
The frequency measurement method as described in claim 9 or 10 is realized when program instruction is executed by processor.
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