CN107946879B - Frequency collection filtering method, device, storage medium and laser - Google Patents
Frequency collection filtering method, device, storage medium and laser Download PDFInfo
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- CN107946879B CN107946879B CN201711498916.4A CN201711498916A CN107946879B CN 107946879 B CN107946879 B CN 107946879B CN 201711498916 A CN201711498916 A CN 201711498916A CN 107946879 B CN107946879 B CN 107946879B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0078—Frequency filtering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
- H04B10/505—Laser transmitters using external modulation
- H04B10/5057—Laser transmitters using external modulation using a feedback signal generated by analysing the optical output
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Abstract
The present invention relates to field of laser device technology, disclose frequency collection filtering method, device, storage medium and laser.Frequency collection filtering method includes: the interval time of continuous acquisition square-wave signal adjacent rising edges and/or adjacent falling edges；Primary filtering, seeks the difference of two neighboring interval time, rejects the two neighboring interval time when the difference exceeds time threshold, the two neighboring interval time is retained when the difference is without departing from the time threshold；Secondary filtering, the interval time in the two neighboring interval time that the primary filtering is retained is compared with the minimum period, when an interval time in the two neighboring interval time that the primary filtering retains being greater than the minimum period, retain the two neighboring interval time that the primary filtering retains.Not only timeliness is high but also thorough for the filtering of interference signal for technical solution disclosed by the invention, not the waveform of malleable square-wave signal.
Description
Technical field
Technical solution disclosed by the embodiments of the present invention is related to field of laser device technology, more particularly to the frequency applied to laser
Rate acquires filtering method, device, storage medium and laser.
Background technique
Currently, laser mainly controls the output frequency of laser by acquiring the frequency of square-wave signal.Since square wave is believed
There can be interference in number, it is therefore desirable to be filtered when acquiring square-wave signal to square-wave signal, to remove interference signal.Often
Filtering mode is delay acquisition, i.e., after the low and high level that square-wave signal occurs changes, delay a period of time is laggard
The acquisition of row square-wave signal.The filtering mode of delay acquisition can change the waveform of square-wave signal, and the duration for the acquisition that is furthermore delayed is difficult
With determination.
Inventor has found that the frequency collection of laser filters real timeliness in the prior art during studying the present invention
It is low, it is easy to change the waveform of square-wave signal, the filtering of interference signal is not thorough.
Summary of the invention
Technical solution disclosed by the invention is at least able to solve following technical problem: the frequency of laser is adopted in the prior art
The real timeliness of collection filtering is low, is easy to change the waveform of square-wave signal, the filtering of interference signal is not thorough.
One or more embodiment of the invention discloses a kind of frequency collection filtering method, is applied to laser, packet
It includes: the interval time of continuous acquisition square-wave signal adjacent rising edges and/or adjacent falling edges；Primary filtering, seeks two neighboring
The difference of interval time rejects the two neighboring interval time when the difference exceeds time threshold, when the difference does not have
Retain the two neighboring interval time when having beyond the time threshold；Secondary filtering, the institute that the primary filtering is retained
An interval time in two neighboring interval time is stated compared with the minimum period, when it is described it is primary filtering retain it is described adjacent
When an interval time in two interval times is greater than the minimum period, retain the described adjacent of the primary filtering reservation
Two interval times.
In one or more embodiment of the invention, with the secondary filtering retain the two neighboring interval when
Between in an interval time update minimum period.
In one or more embodiment of the invention, when the two neighboring interval that the primary filtering retains
Between in an interval time be greater than accumulative when the updated minimum period be greater than between the updated minimum period
Every the quantity of time, updated when the quantity is greater than the first interference threshold with an interval time for being greater than the minimum period
The minimum period rejects when the quantity is less than or equal to first interference threshold and added up all greater than institute of quantity
State the interval time of minimum period.
In one or more embodiment of the invention, when the two neighboring interval that the primary filtering retains
Between in an interval time be less than accumulative when the updated minimum period be less than between the updated minimum period
Every the quantity of time, updated when the quantity is greater than the second interference threshold with an interval time for being less than the minimum period
The minimum period rejects when the quantity is less than or equal to second interference threshold and added up all less than institute of quantity
State the interval time of minimum period.
One or more embodiment of the invention discloses a kind of frequency collection filter, is applied to laser, packet
Include acquisition module, a filter module and secondary filtering module；The acquisition module is adjacent for continuous acquisition square-wave signal
The interval time of rising edge and/or adjacent falling edges；Filter module is used to seek the difference of two neighboring interval time
Value, when the difference exceed time threshold when reject the two neighboring interval time, when the difference without departing from it is described when
Between threshold value when retain the two neighboring interval time；Described in the secondary filtering module is used to retain the primary filtering
An interval time in two neighboring interval time compared with the minimum period, when it is described it is primary filtering retain described adjacent two
When an interval time in a interval time is greater than the minimum period, retain the primary filtering retains described adjacent two
A interval time.
In one or more embodiment of the invention, the secondary filtering module is also used to secondary filtering guarantor
An interval time in the two neighboring interval time stayed updates the minimum period.
In one or more embodiment of the invention, the secondary filtering module is also used to protect when the primary filtering
The interval time in the two neighboring interval time stayed is greater than accumulative greater than more when the updated minimum period
The quantity of the interval time of the minimum period after new, when the quantity is greater than the first interference threshold to be greater than the minimum
One interval time in period updates the minimum period, rejects when the quantity is less than or equal to first interference threshold
Added up all interval times greater than the minimum period of quantity.
In one or more embodiment of the invention, the secondary filtering module is also used to protect when the primary filtering
The interval time in the two neighboring interval time stayed is less than accumulative less than more when the updated minimum period
The quantity of the interval time of the minimum period after new, when the quantity is greater than the second interference threshold to be less than the minimum
One interval time in period updates the minimum period, rejects when the quantity is less than or equal to second interference threshold
Added up all interval times less than the minimum period of quantity.
One or more embodiment of the invention also discloses a kind of non-transient computer readable storage medium, described non-
Computer instruction is stored in transitory computer readable storage medium, the computer instruction is loaded suitable for processor, to realize
Any one of the above frequency collection filtering method.
One or more embodiment of the invention also discloses a kind of laser, using any one of the above frequency collection
Filtering method is filtered collected square-wave signal.
Compared with prior art, technical solution disclosed by the invention mainly have it is following the utility model has the advantages that
In an embodiment of the present invention, the frequency collection filtering method includes: the adjacent rising of continuous acquisition square-wave signal
The interval time of edge and/or adjacent falling edges；Primary filtering, seeks the difference of two neighboring interval time, when the difference is super
The two neighboring interval time is rejected when time threshold out, when the difference is without departing from the time threshold described in reservation
Two neighboring interval time；Secondary filtering, will be between one in the two neighboring interval time of the primary filtering reservation
An interval time every the time compared with the minimum period, in the two neighboring interval time that the primary filtering retains
When greater than the minimum period, retain the two neighboring interval time that the primary filtering retains.Due to interference signal
Period is generally significantly less than the period of regular block signal, and be it is fragmentary appear in square-wave signal, therefore by described
The difference that primary filtering can reject two neighboring interval time exceeds the interference signal of time threshold, passes through the secondary filtering
The difference of two neighboring interval time can be rejected without departing from time threshold but interval time is not more than the interference of minimum period
Signal.Frequency collection filtering method disclosed by the invention passes through the primary filtering during acquiring the frequency of square-wave signal
The interference signal in collected square-wave signal is filtered out with the secondary filtering, in terms of existing technologies not only timeliness
Height, and it is more thorough for the filtering of interference signal, and the waveform of malleable square-wave signal, is not conducive to the output frequency for improving laser
The accuracy of rate.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application, below will be to needed in the embodiment attached
Figure is briefly described, it should be apparent that, the drawings in the following description are only some examples of the present application, for this field
For those of ordinary skill, without any creative labor, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the schematic diagram that the square-wave signal of interference is not affected by one embodiment of the invention；
Fig. 2 is the schematic diagram for the square-wave signal being interfered in one embodiment of the invention；
Fig. 3 is a kind of schematic diagram of frequency collection filtering method in one embodiment of the invention；
Fig. 4 is the schematic diagram that each step cycle of frequency collection filtering method described in one embodiment of the invention executes；
Fig. 5 is a kind of schematic diagram of frequency collection filter in one embodiment of the invention.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give presently preferred embodiments of the present invention.But the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is keeps the understanding to the disclosure more thorough
Comprehensively.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Following claims, specification and Figure of description
In term " first ", " second " etc. be to be not use to describe a particular order for distinguishing different objects.
One embodiment of the invention discloses a kind of frequency collection filtering method, below by specific embodiment to of the invention
Technical solution is illustrated, and the frequency collection filtering method being related in specific embodiment is preferred embodiment, not
The all possible embodiment of the present invention.The frequency collection filtering method that various embodiments of the present invention are related to is mainly used in optical fiber
Laser.
With reference to Fig. 1 and Fig. 2, wherein Fig. 1 is the schematic diagram that the square-wave signal of interference is not affected by one embodiment of the invention,
Fig. 2 is the schematic diagram for the square-wave signal being interfered in one embodiment of the invention.It anticipates, is not affected by as shown in Figures 1 and 2
The period of the square-wave signal of interference be it is fixed, the period for the square-wave signal being interfered be variation, often interfere with signal
The period of the square-wave signal than being not affected by interference in period is short.
Referring to figs. 2 and 3, wherein Fig. 3 is a kind of schematic diagram of frequency collection filtering method in one embodiment of the invention.
A kind of frequency collection filtering method includes:
Step 101: the interval time of continuous acquisition square-wave signal adjacent rising edges and/or adjacent falling edges；
Step 102: the difference of two neighboring interval time is sought in primary filtering, when the difference exceeds time threshold
The two neighboring interval time is rejected, the two neighboring interval is retained when the difference is without departing from the time threshold
Time；
Step 103: secondary filtering, the interval in the two neighboring interval time that the primary filtering is retained
Time is big when an interval time in the two neighboring interval time that the primary filtering retains compared with the minimum period
When the minimum period, retain the two neighboring interval time that the primary filtering retains.
It since the period of interference signal is generally significantly less than the period of regular block signal, and is the fragmentary side of appearing in
In wave signal, thus by the primary filtering can reject two neighboring interval time difference exceed time threshold interference
Signal can reject the difference of two neighboring interval time without departing from time threshold but interval time by the secondary filtering
No more than the interference signal of minimum period.Mistake of the frequency collection filtering method disclosed by the invention in the frequency of acquisition square-wave signal
The interference signal in collected square-wave signal is filtered out by the primary filtering and the secondary filtering in journey, relative to existing
Not only timeliness is high for technology, but also more thorough for the filtering of interference signal, not the waveform of malleable square-wave signal, favorably
In the accuracy for the output frequency for improving laser.
By taking the square-wave signal being interfered illustrated in Fig. 2 as an example, by continuous acquisition square-wave signal adjacent rising edges or
The interval time of person's adjacent falling edges, namely obtain the period of each individual square-wave signal.Due to the frequency of square-wave signal
It is the inverse in period, therefore is equivalent to the frequency for obtaining each individual square-wave signal.Such as illustrate in Fig. 2 t1, t2,
t3,t4,t5,t6,t7,t8.Then the square-wave signal is once filtered, is specifically included: when seeking two neighboring interval
Between t1 and t2 difference, it is preferred that the difference of t1 and t2 is | t1-t2 |.When difference | t1-t2 | when exceeding time threshold δ, reject
The two neighboring interval time t1 and t2.When difference | t1-t2 | when without departing from time threshold δ, retain described two neighboring
Interval time t1 and t2.It is assumed that difference | t1-t2 | exceed time threshold δ, then needs to reject the two neighboring interval time t1
And t2, then seek the difference of two neighboring interval time t3 and t4 | t3-t4 |.It is assumed that difference | t3-t4 | and | t4-t5 | all do not have
Have beyond time threshold δ, then retains described two neighboring interval time t3, t4 and t5.When then seeking two neighboring interval
Between t5 and t6 difference | t5-t6 |.It is assumed that difference | t5-t6 | exceed time threshold δ, then rejects the two neighboring interval time
T5 and t6.Then the difference of two neighboring interval time t7 and t8 is sought | t7-t8 |.It is assumed that difference | t7-t8 | without departing from when
Between threshold value δ, then retain the two neighboring interval time t7 and t8.The square-wave signal is carried out after once filtering, is shown in Fig. 2
T1, t2, t3, t4, t5, t6, t7, t8 of meaning remain with t3, t4, t7 and t8.Usually normal square-wave signal and interference signal
When adjacent, the period of the two will not be equal, and their difference can exceed time threshold when, in order to sufficiently reject interference letter
Number, therefore adjacent regular block signal and interference signal are all rejected.
Since the adjacent rising edges of acquisition square-wave signal or the interval time of adjacent falling edges have error, and interfere
The period of signal and be not affected by interference square-wave signal period existing for deviation it is larger, therefore by two neighboring interval time
On the one hand difference can allow collected square-wave signal to have certain tolerance compared with the time threshold δ, on the other hand can be with
Exclude the interference signal in square-wave signal.In an embodiment of the present invention, if the difference of two neighboring interval time does not surpass
The time threshold δ out, then it is assumed that two neighboring interval time, corresponding square-wave signal belonged to period equal square wave letter
Number.The time threshold δ can be the 10% of the regular block signal period.
Secondary filtering is carried out to the square-wave signal, is specifically included: first by the t3 or t4 in two neighboring interval time
Compared with the minimum period, the minimum period of most initial is generally by systemic presupposition.It is assumed that the t3 in the two neighboring interval time
Or t4 is greater than the minimum period, therefore retains the two neighboring interval time t3 and t4.The secondary filtering is retained
T3 or t4 in the two neighboring interval time update the minimum period.Namely at this time the minimum period become t3 or
t4.Then it repeats the above process and secondary filtering is carried out to next two neighboring interval time t7 and t8.
It is the signal that each step cycle of frequency collection filtering method described in one embodiment of the invention executes with reference to Fig. 4
Figure.As schematically shown in figure 4, the frequency collection filtering method is in continuous acquisition square-wave signal adjacent rising edges and/or adjacent
It recycles and executes in three interval time of failing edge, once filtering, secondary filtering steps, and updated during secondary filtering
Minimum period, so that the minimum period continual interval time with square-wave signal adjacent rising edges or adjacent falling edges
It is adapted, namely makes the minimum period continual variation for adapting to square-wave signal.
In one or more embodiment of the invention, with the secondary filtering retain the two neighboring interval when
Between in an interval time update minimum period.
When an interval time in the two neighboring interval time that the primary filtering retains is greater than updated
The quantity for adding up the interval time greater than the updated minimum period when minimum period, when the quantity is greater than first
The minimum period is updated with an interval time for being greater than the minimum period when interference threshold, when the quantity is less than or waits
All interval times greater than the minimum period for adding up quantity are rejected when first interference threshold.Therefore when subsequent
When the period of collected regular block signal becomes larger, the minimum period can be with the secondary filtering in the secondary filtering
It carries out and continual update, enables the value of the minimum period to adapt to the variation of square-wave signal automatically, be conducive to
Subsequent acquisition to regular block signal period become larger in the case of continue to filter out interference signal in square-wave signal.Described
One interference threshold can be counted according to the waveform of interference signal and be obtained, for example, 2 times, 3 times or 5 times.
In one or more embodiment of the invention, when the two neighboring interval that the primary filtering retains
Between in an interval time be less than accumulative when the updated minimum period be less than between the updated minimum period
Every the quantity of time, updated when the quantity is greater than the second interference threshold with an interval time for being less than the minimum period
The minimum period rejects when the quantity is less than or equal to second interference threshold and added up all less than institute of quantity
State the interval time of minimum period.Therefore when subsequent acquisition to period of regular block signal become smaller when, the secondary filtering
The middle minimum period can the continual update with the progress of the secondary filtering, enable the value of the minimum period
The automatic variation for adapting to square-wave signal, be conducive to subsequent acquisition to period of regular block signal become smaller in the case of continue
Filter out the interference signal in square-wave signal.Second interference threshold can be counted according to the waveform of interference signal and be obtained, can be with
It is 2 times, 3 times or 5 times.
In the secondary filtering in above-described embodiment the minimum period can with the secondary filtering progress without
Disconnected update enables the value of the minimum period to adapt to the variation of square-wave signal automatically, therefore in above-described embodiment
Frequency collection filtering method is advantageously implemented intelligentized frequency collection filtering, improves the intelligence degree of laser.
One embodiment of the invention discloses a kind of frequency collection filter, below by specific embodiment to of the invention
Technical solution is illustrated, and the frequency collection filter being related in specific embodiment is preferred embodiment, not
The all possible embodiment of the present invention.The frequency collection filter that various embodiments of the present invention are related to is mainly used in optical fiber
Laser.
With reference to Fig. 5, wherein Fig. 5 is a kind of schematic diagram of frequency collection filter in one embodiment of the invention.Such as Fig. 5
Shown in meaning, the frequency collection filter includes 1, filter module 2 of acquisition module and secondary filtering module 3.
Interval time of the acquisition module 1 for continuous acquisition square-wave signal adjacent rising edges and/or adjacent falling edges.
Filter module 2 is used to seek the difference of two neighboring interval time, when the difference exceeds time threshold
The two neighboring interval time is rejected when value, is retained when the difference is without departing from the time threshold described two neighboring
Interval time.
One in the two neighboring interval time that the secondary filtering module 3 is used to retain the primary filtering
Interval time compared with the minimum period, when it is described it is primary filtering retain the two neighboring interval time in an interval when
Between be greater than the minimum period when, retain it is described it is primary filtering retain the two neighboring interval time.
In one or more embodiment of the invention, the secondary filtering module 3 is also used to the secondary filtering
The interval time in the two neighboring interval time retained updates the minimum period.
In one or more embodiment of the invention, the secondary filtering module 3 is also used to when the primary filtering
The interval time in the two neighboring interval time retained adds up to be greater than when being greater than the updated minimum period
The quantity of the interval time of the updated minimum period, be greater than when the quantity is greater than the first interference threshold it is described most
The interval time of minor cycle updates the minimum period, picks when the quantity is less than or equal to first interference threshold
Except all interval times greater than the minimum period for adding up quantity.
In one or more embodiment of the invention, the secondary filtering module 3 is also used to when the primary filtering
The interval time in the two neighboring interval time retained adds up to be less than when being less than the updated minimum period
The quantity of the interval time of the updated minimum period, be less than when the quantity is greater than the second interference threshold it is described most
The interval time of minor cycle updates the minimum period, picks when the quantity is less than or equal to second interference threshold
Except all interval times less than the minimum period for adding up quantity.
One embodiment of the invention discloses a kind of non-transient computer readable storage medium, and the non-transient computer is readable
Computer instruction is stored in storage medium, the computer instruction is loaded suitable for processor, to realize any one of the above frequency
Rate acquires filtering method.
One embodiment of the invention discloses a kind of laser, using any one of the above frequency collection filtering method to acquisition
To square-wave signal be filtered.
When the technical solution in above-mentioned each embodiment uses software realization, above-mentioned each embodiment can will be realized
Computer instruction and/or data storage in computer-readable medium or as on readable medium one or more instructions or
Code is transmitted.Computer-readable medium includes computer storage media and communication media, and wherein communication media includes being convenient for
From a place to any medium of another place transmission computer program.Storage medium can be what computer can store
Any usable medium.As example but not limited to this: computer-readable medium may include RAM, ROM, EEPROM, CD-ROM or
Other optical disc storages, magnetic disk storage medium or other magnetic storage apparatus or can carry or store with instruction or data
The desired program code of structure type simultaneously can be by any other medium of computer access.In addition, any connection can fit
When become computer-readable medium.For example, if software is using coaxial cable, light pricker optical cable, twisted pair, Digital Subscriber Line
(DSL) either the wireless technology of such as infrared ray, radio and microwave etc is transmitted from website, server or other remote sources
, then the wireless technology packet of coaxial cable, optical fiber cable, twisted pair, DSL or such as infrared ray, wireless and microwave etc
It includes in the definition of affiliated medium.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the application, rather than its limitations.Although
The application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.
And these are modified or replaceed, each embodiment technical solution of the application that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of frequency collection filtering method is applied to laser characterized by comprising continuous acquisition square-wave signal is adjacent
The interval time of rising edge or adjacent falling edges；
Primary filtering, seeks the difference of two neighboring interval time, rejects when the difference exceeds time threshold described adjacent
Two interval times retain the two neighboring interval time when the difference is without departing from the time threshold；
Secondary filtering, by the primary interval time filtered in the two neighboring interval time retained and most Xiao Zhou
Phase compares, and is greater than the most Xiao Zhou when an interval time in the two neighboring interval time that the primary filtering retains
When the phase, retain the two neighboring interval time that the primary filtering retains.
2. frequency collection filtering method according to claim 1, which is characterized in that described in secondary filtering reservation
An interval time in two neighboring interval time updates the minimum period.
3. frequency collection filtering method according to claim 2, which is characterized in that described in retaining when the primary filtering
An interval time in two neighboring interval time is greater than accumulative greater than updated institute when the updated minimum period
The quantity for stating the interval time of minimum period is greater than the one of the minimum period when the quantity is greater than the first interference threshold
A interval time updates the minimum period, rejects when the quantity is less than or equal to first interference threshold and added up to count
All interval times greater than the minimum period of amount.
4. frequency collection filtering method according to claim 2, which is characterized in that described in retaining when the primary filtering
An interval time in two neighboring interval time is less than accumulative less than updated institute when the updated minimum period
The quantity for stating the interval time of minimum period is less than the one of the minimum period when the quantity is greater than the second interference threshold
A interval time updates the minimum period, rejects when the quantity is less than or equal to second interference threshold and added up to count
All interval times less than the minimum period of amount.
5. a kind of frequency collection filter is applied to laser, which is characterized in that including acquisition module, a filter module
And secondary filtering module；Interval of the acquisition module for continuous acquisition square-wave signal adjacent rising edges or adjacent falling edges
Time；
Filter module is used to seek the difference of two neighboring interval time, picks when the difference exceeds time threshold
Except the two neighboring interval time, when retaining the two neighboring interval when the difference is without departing from the time threshold
Between；
The interval in the two neighboring interval time that the secondary filtering module is used to retain the primary filtering
Time is big when an interval time in the two neighboring interval time that the primary filtering retains compared with the minimum period
When the minimum period, retain the two neighboring interval time that the primary filtering retains.
6. frequency collection filter according to claim 5, which is characterized in that the secondary filtering module be also used to
The interval time in the two neighboring interval time that the secondary filtering retains updates the minimum period.
7. frequency collection filter according to claim 6, which is characterized in that the secondary filtering module is also used to work as
The interval time in the two neighboring interval time that the primary filtering retains is greater than the updated most Xiao Zhou
The quantity for adding up the interval time greater than the updated minimum period when phase, when the quantity is greater than the first interference threshold
The minimum period is updated with an interval time for being greater than the minimum period, when the quantity is less than or equal to described first
All interval times greater than the minimum period for adding up quantity are rejected when interference threshold.
8. frequency collection filter according to claim 6, which is characterized in that the secondary filtering module is also used to work as
The interval time in the two neighboring interval time that the primary filtering retains is less than the updated most Xiao Zhou
The quantity for adding up the interval time less than the updated minimum period when phase, when the quantity is greater than the second interference threshold
The minimum period is updated with an interval time for being less than the minimum period, when the quantity is less than or equal to described second
All interval times less than the minimum period for adding up quantity are rejected when interference threshold.
9. a kind of non-transient computer readable storage medium, which is characterized in that in the non-transient computer readable storage medium
It is stored with computer instruction, the computer instruction is loaded suitable for processor, to realize described in Claims 1-4 any one
Frequency collection filtering method.
10. a kind of laser, which is characterized in that using frequency collection filtering method pair described in Claims 1-4 any one
Collected square-wave signal is filtered.
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| CN201711498916.4A CN107946879B (en) | 2017-12-30 | 2017-12-30 | Frequency collection filtering method, device, storage medium and laser |
| PCT/CN2018/114898 WO2019128493A1 (en) | 2017-12-30 | 2018-11-09 | Filtering method for frequency acquisition, device, computer readable storage medium, and laser |
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| CN107946879B (en) * | 2017-12-30 | 2019-08-09 | 深圳市创鑫激光股份有限公司 | Frequency collection filtering method, device, storage medium and laser |
| CN112496565B (en) * | 2020-11-17 | 2023-03-03 | 上海维宏智能技术有限公司 | Device for realizing signal processing of servo system of laser cutting head |
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| GB777832A (en) * | 1954-04-06 | 1957-06-26 | Bristol Aircraft Ltd | Improvements in or relating to multiplier devices for analogue computers and the like |
| US20060250939A1 (en) * | 2005-03-28 | 2006-11-09 | Wang Michael M | Optimal timing and frequency acquisition for OFDM systems |
| US20060239661A1 (en) * | 2005-04-22 | 2006-10-26 | Mediatek Inc. | Frequency detection methods |
| KR101380380B1 (en) * | 2012-07-30 | 2014-04-10 | 한국전기연구원 | Method of adaptive phase tracking depending on the state of power system and system for it |
| CN105092966B (en) * | 2014-04-21 | 2018-03-27 | 西门子公司 | Signal frequency detection method, device and equipment protection method and protection equipment |
| CN104850170B (en) * | 2015-06-04 | 2017-12-19 | 杭州万高科技股份有限公司 | It is a kind of to measure SoC chip and its clock acquirement method without crystal |
| CN106454670B (en) * | 2016-10-20 | 2020-06-02 | 海能达通信股份有限公司 | Howling detection method and device |
| CN106681190B (en) * | 2016-12-29 | 2020-04-03 | 北京经纬恒润科技有限公司 | Filtering method and device |
| CN107196674A (en) * | 2017-05-31 | 2017-09-22 | 广东欧珀移动通信有限公司 | Filtering method, device, filtering unit, Wireless Fidelity circuit and mobile terminal |
| CN107946879B (en) * | 2017-12-30 | 2019-08-09 | 深圳市创鑫激光股份有限公司 | Frequency collection filtering method, device, storage medium and laser |
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2017
- 2017-12-30 CN CN201711498916.4A patent/CN107946879B/en active Active
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2018
- 2018-11-09 WO PCT/CN2018/114898 patent/WO2019128493A1/en active Application Filing
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| WO2019128493A1 (en) | 2019-07-04 |
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