CN109495109A - A kind of multichannel AD sampled time skew synchronous method and synchronization system - Google Patents
A kind of multichannel AD sampled time skew synchronous method and synchronization system Download PDFInfo
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- CN109495109A CN109495109A CN201811318602.6A CN201811318602A CN109495109A CN 109495109 A CN109495109 A CN 109495109A CN 201811318602 A CN201811318602 A CN 201811318602A CN 109495109 A CN109495109 A CN 109495109A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/06—Continuously compensating for, or preventing, undesired influence of physical parameters
- H03M1/0617—Continuously compensating for, or preventing, undesired influence of physical parameters characterised by the use of methods or means not specific to a particular type of detrimental influence
- H03M1/0624—Continuously compensating for, or preventing, undesired influence of physical parameters characterised by the use of methods or means not specific to a particular type of detrimental influence by synchronisation
Abstract
The invention discloses a kind of multichannel AD sampled time skew synchronous method and synchronization systems, it include: to be directed to n sampling channel, the Cn that is respectively labeled as C1, C2 ..., it successively carries out sampling according to predetermined order C1, C2 ... Cn and then obtains sequence and arrange [P1, P2 ... Pn], C1 is successively sampled and then obtained opposite sequence [N1, N2 ... Nn] according to backward Cn, C (n-1) ...；The average value of first sampled data P1 of computation sequence column and the last one sampled data of opposite sequence Nn first, and then first sampled point is obtained in the sampled value S1 of intermediate time；Then the average value of computation sequence column second sampled data P2 and opposite sequence penultimate sampled data N (n-1) obtains second sampled point in the sampled value S2 of intermediate time；Then and so on, each sampled point is calculated in the sampled value of intermediate time；Finally obtained sample sequence [S1, S2 ... Sn].
Description
Technical field
When being sampled the invention belongs to Automation of Electric Systems and electronic information technical field more particularly to a kind of multichannel AD
Poor synchronous method and synchronization system.
Background technique
It is well known that AD sampling has a decisive role in analog-digital conversion process, it is quick with electronic technology
Development, multichannel AD sampling application is more and more extensive, currently, conventionally employed is that sequence is adopted when carrying out multichannel AD sampling
Original mold formula, is found by practice process: in traditional order sampling, since each channel analogy amount sampling instant is there are deviation, by
This causes sampling instant asynchronous, influences depth calculation, analysis and the application of analog quantity.
Summary of the invention
In view of the problems of the existing technology, the sampling instant deviation occurred when the present invention is sampled for multichannel AD is existing
As proposing a kind of multichannel AD sampled time skew synchronous method and synchronization system, being used for multichannel AD sample-synchronous.；
One of the objects of the present invention is to provide a kind of multichannel AD sampled time skew synchronous method, include the following steps:
Step 1: being marked and sample to multiple sampling channels, specifically:
Be directed to n sampling channel, the Cn that is respectively labeled as C1, C2 ..., according to predetermined order C1, C2 ... Cn successively into
Row, which samples and then obtains sequence, arranges [P1, P2 ... Pn], and according to backward Cn, C (n-1) ..., C1 successively samples and then obtain backward
It arranges [N1, N2 ... Nn], wherein n is the natural number greater than 1；
Step 2: pass through said sequence column and backward column count sample sequence；
The average value of first sampled data P1 of computation sequence column and the last one sampled data of opposite sequence Nn first, in turn
First sampled point is obtained in the sampled value S1 of intermediate time；Then second sampled data P2 of computation sequence column and opposite sequence are fallen
The average value of second sampled data N (n-1) of number, and then second sampled point is obtained in the sampled value S2 of intermediate time；Then
And so on, each sampled point is calculated in the sampled value of intermediate time；Finally obtained sample sequence [S1, S2 ... Sn] is as
The time difference revised sample sequence.
The second object of the present invention is to provide a kind of system of multichannel AD sampled time skew synchronous method, include at least:
Label sampling module: being marked and sample to multiple sampling channels, specifically:
Be directed to n sampling channel, the Cn that is respectively labeled as C1, C2 ..., according to predetermined order C1, C2 ... Cn successively into
Row, which samples and then obtains sequence, arranges [P1, P2 ... Pn], and according to backward Cn, C (n-1) ..., C1 successively samples and then obtain backward
It arranges [N1, N2 ... Nn], wherein n is the natural number greater than 1；
Calculate sample sequence module: by said sequence column and backward column count sample sequence；
The average value of first sampled data P1 of computation sequence column and the last one sampled data of opposite sequence Nn first, in turn
First sampled point is obtained in the sampled value S1 of intermediate time；Then second sampled data P2 of computation sequence column and opposite sequence are fallen
The average value of second sampled data N (n-1) of number, and then second sampled point is obtained in the sampled value S2 of intermediate time；Then
And so on, each sampled point is calculated in the sampled value of intermediate time；Finally obtained sample sequence [S1, S2 ... Sn] is as
The time difference revised sample sequence.
The third object of the present invention is to provide a kind of computer program for realizing multichannel AD sampled time skew synchronous method.
The fourth object of the present invention is to provide at a kind of information data for realizing multichannel AD sampled time skew synchronous method
Manage terminal.
The fifth object of the present invention is to provide a kind of computer readable storage medium, including instruction, when it is in computer
When upper operation, so that computer executes multichannel AD sampled time skew synchronous method.
In conclusion advantages of the present invention and good effect are as follows:
The present invention can correct sampled time skew, realize sample-synchronous, widen the application range calculated based on analog quantity, and
Realization process is simple and easy, and calculation amount is small, and CPU usage is low, has saved the intrinsic cost of hardware and software development cost.Work as application
When the chips such as ADC chip or the processor with ADC manufacture and design, only a small amount of sampling is needed to keep circuit, can be realized more
The synchronized sampling of channel analogy amount, has saved hardware cost.
Detailed description of the invention
Fig. 1 is the flow chart of the preferred embodiment of the present invention；
Fig. 2 is the schematic diagram of the preferred embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Fig. 1 to Fig. 2 is please referred to, a kind of multichannel AD sampled time skew synchronous method when AD is sampled, changes continuously smooth
Analog quantity, when sampling interval very little, can be approximately considered variation track between two continuous sampling points is a straight line, is taken
The average value of the two sampled datas up to central instant sampled data.In consideration of it, using sequence and backward double sampling, and
The method being averaged realizes sample-synchronous.Specific step is as follows:
Step 1: for multiple sampling channels, the Cn for ease of description, being denoted as C1, C2 ..., according to predetermined order C1,
C2 ... Cn is successively sampled, and then according to backward Cn, C (n-1) ..., C1 is successively sampled, and thus obtains two sample sequences:
Sequence column [P1, P2 ... Pn] and opposite sequence [N1, N2 ... Nn].Because sequential sampling and backward are sampled as symmetry operation, institute
Also symmetry equivalent with the respective sampling interval, i.e. Pn and P (n-1) sampling interval duration are equal to N1 and N2 sampling interval duration, P (n-
1) and P (n-2) sampling interval duration is equal to N2 and N3 sampling interval duration, and so on.The multiple sampling channel is two
And more than two channels.
Step 2: the average value of first sampled data P1 of computation sequence column and the last one sampled data of opposite sequence Nn, i.e.,
First sampled point is obtained in the sampled value S1 of intermediate time；Second sampled data P2 of computation sequence column and opposite sequence are second from the bottom
The average value of a sampled data N (n-1) to get second sampled point intermediate time sampled value S2；And so on, calculate it
Sampled value of its each sampled point in intermediate time.New sample sequence [S1, S2 ... Sn] is revised to adopt the time difference
Sample sequence.
Because sequence column and opposite sequence sampling interval are symmetry equivalent, the intermediate time of each sampled point is identical, thus
Sampled time skew is had modified, sample-synchronous is realized.
Preferred embodiment two, a kind of realization multichannel AD sampled time skew synchronization system, comprising:
Label sampling module: being marked and sample to multiple sampling channels, specifically:
Be directed to n sampling channel, the Cn that is respectively labeled as C1, C2 ..., according to predetermined order C1, C2 ... Cn successively into
Row, which samples and then obtains sequence, arranges [P1, P2 ... Pn], and according to backward Cn, C (n-1) ..., C1 successively samples and then obtain backward
It arranges [N1, N2 ... Nn], wherein n is the natural number greater than 1；
Calculate sample sequence module: by said sequence column and backward column count sample sequence；
The average value of first sampled data P1 of computation sequence column and the last one sampled data of opposite sequence Nn first, in turn
First sampled point is obtained in the sampled value S1 of intermediate time；Then second sampled data P2 of computation sequence column and opposite sequence are fallen
The average value of second sampled data N (n-1) of number, and then second sampled point is obtained in the sampled value S2 of intermediate time；Then
And so on, each sampled point is calculated in the sampled value of intermediate time；Finally obtained sample sequence [S1, S2 ... Sn] is as
The time difference revised sample sequence.
Preferred embodiment three, a kind of computer program for realizing multichannel AD sampled time skew synchronous method, the multichannel
AD sampled time skew synchronous method include the following steps: AD sampling when, for continuously smooth variation analog quantity, when the sampling interval very
Hour, the variation track that can be approximately considered between two continuous sampling points is a straight line, takes being averaged for the two sampled datas
It is worth the sampled data up to central instant.In consideration of it, using sequence and backward double sampling, and the method being averaged, it realizes
Sample-synchronous.Specific step is as follows:
Step 1: for multiple sampling channels, the Cn for ease of description, being denoted as C1, C2 ..., according to predetermined order C1,
C2 ... Cn is successively sampled, and then according to backward Cn, C (n-1) ..., C1 is successively sampled, and thus obtains two sample sequences:
Sequence column [P1, P2 ... Pn] and opposite sequence [N1, N2 ... Nn].Because sequential sampling and backward are sampled as symmetry operation, institute
Also symmetry equivalent with the respective sampling interval, i.e. Pn and P (n-1) sampling interval duration are equal to N1 and N2 sampling interval duration, P (n-
1) and P (n-2) sampling interval duration is equal to N2 and N3 sampling interval duration, and so on.The multiple sampling channel is two
And more than two channels.
Step 2: the average value of first sampled data P1 of computation sequence column and the last one sampled data of opposite sequence Nn, i.e.,
First sampled point is obtained in the sampled value S1 of intermediate time；Second sampled data P2 of computation sequence column and opposite sequence are second from the bottom
The average value of a sampled data N (n-1) to get second sampled point intermediate time sampled value S2；And so on, calculate it
Sampled value of its each sampled point in intermediate time.New sample sequence [S1, S2 ... Sn] is revised to adopt the time difference
Sample sequence.
Because sequence column and opposite sequence sampling interval are symmetry equivalent, the intermediate time of each sampled point is identical, thus
Sampled time skew is had modified, sample-synchronous is realized.
Preferred embodiment four, a kind of information data processing terminal for realizing multichannel AD sampled time skew synchronous method.It is described
Multichannel AD sampled time skew synchronous method includes the following steps: that the multichannel AD sampled time skew synchronous method includes following step
It is rapid: when AD is sampled, can be approximately considered by two and continuously adopted when sampling interval very little for the analog quantity of continuously smooth variation
Variation track between sampling point is a straight line, takes the average value of the two sampled datas up to the sampled data of central instant.Mirror
In this, using sequence and backward double sampling, and the method being averaged realizes sample-synchronous.Specific step is as follows:
Step 1: for multiple sampling channels, the Cn for ease of description, being denoted as C1, C2 ..., according to predetermined order C1,
C2 ... Cn is successively sampled, and then according to backward Cn, C (n-1) ..., C1 is successively sampled, and thus obtains two sample sequences:
Sequence column [P1, P2 ... Pn] and opposite sequence [N1, N2 ... Nn].Because sequential sampling and backward are sampled as symmetry operation, institute
Also symmetry equivalent with the respective sampling interval, i.e. Pn and P (n-1) sampling interval duration are equal to N1 and N2 sampling interval duration, P (n-
1) and P (n-2) sampling interval duration is equal to N2 and N3 sampling interval duration, and so on.The multiple sampling channel is two
And more than two channels.
Step 2: the average value of first sampled data P1 of computation sequence column and the last one sampled data of opposite sequence Nn, i.e.,
First sampled point is obtained in the sampled value S1 of intermediate time；Second sampled data P2 of computation sequence column and opposite sequence are second from the bottom
The average value of a sampled data N (n-1) to get second sampled point intermediate time sampled value S2；And so on, calculate it
Sampled value of its each sampled point in intermediate time.New sample sequence [S1, S2 ... Sn] is revised to adopt the time difference
Sample sequence.
Because sequence column and opposite sequence sampling interval are symmetry equivalent, the intermediate time of each sampled point is identical, thus
Sampled time skew is had modified, sample-synchronous is realized.
Preferred embodiment five, a kind of computer readable storage medium, including instruction, when run on a computer, make
It obtains computer and executes multichannel AD sampled time skew synchronous method, the multichannel AD sampled time skew synchronous method includes following step
It is rapid: when the multichannel AD sampled time skew synchronous method includes the following steps: AD sampling, for the simulation of continuously smooth variation
Amount, when sampling interval very little, the variation track that can be approximately considered between two continuous sampling points is a straight line, takes the two
The average value of sampled data up to central instant sampled data.In consideration of it, using sequence and backward double sampling, and be averaged
The method of value realizes sample-synchronous.Specific step is as follows:
Step 1: for multiple sampling channels, the Cn for ease of description, being denoted as C1, C2 ..., according to predetermined order C1,
C2 ... Cn is successively sampled, and then according to backward Cn, C (n-1) ..., C1 is successively sampled, and thus obtains two sample sequences:
Sequence column [P1, P2 ... Pn] and opposite sequence [N1, N2 ... Nn].Because sequential sampling and backward are sampled as symmetry operation, institute
Also symmetry equivalent with the respective sampling interval, i.e. Pn and P (n-1) sampling interval duration are equal to N1 and N2 sampling interval duration, P (n-
1) and P (n-2) sampling interval duration is equal to N2 and N3 sampling interval duration, and so on.The multiple sampling channel is two
And more than two channels.
Step 2: the average value of first sampled data P1 of computation sequence column and the last one sampled data of opposite sequence Nn, i.e.,
First sampled point is obtained in the sampled value S1 of intermediate time；Second sampled data P2 of computation sequence column and opposite sequence are second from the bottom
The average value of a sampled data N (n-1) to get second sampled point intermediate time sampled value S2；And so on, calculate it
Sampled value of its each sampled point in intermediate time.New sample sequence [S1, S2 ... Sn] is revised to adopt the time difference
Sample sequence.
Because sequence column and opposite sequence sampling interval are symmetry equivalent, the intermediate time of each sampled point is identical, thus
Sampled time skew is had modified, sample-synchronous is realized.
In the above-described embodiments, can come wholly or partly by software, hardware, firmware or any combination thereof real
It is existing.When using entirely or partly realizing in the form of a computer program product, the computer program product include one or
Multiple computer instructions.When loading on computers or executing the computer program instructions, entirely or partly generate according to
Process described in the embodiment of the present invention or function.The computer can be general purpose computer, special purpose computer, computer network
Network or other programmable devices.The computer instruction may be stored in a computer readable storage medium, or from one
Computer readable storage medium is transmitted to another computer readable storage medium, for example, the computer instruction can be from one
A web-site, computer, server or data center pass through wired (such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)
Or wireless (such as infrared, wireless, microwave etc.) mode is carried out to another web-site, computer, server or data center
Transmission).The computer-readable storage medium can be any usable medium or include one that computer can access
The data storage devices such as a or multiple usable mediums integrated server, data center.The usable medium can be magnetic Jie
Matter, (for example, floppy disk, hard disk, tape), optical medium (for example, DVD) or semiconductor medium (such as solid state hard disk Solid
State Disk (SSD)) etc..
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (5)
1. a kind of multichannel AD sampled time skew synchronous method, it is characterised in that: include at least following steps:
Step 1: being marked and sample to multiple sampling channels, specifically:
It is directed to n sampling channel, the Cn that is respectively labeled as C1, C2 ... is successively adopted according to predetermined order C1, C2 ... Cn
Sample obtains sequence in turn and arranges [P1, P2 ... Pn], and according to backward Cn, C (n-1) ..., C1 successively samples and then obtain opposite sequence
[N1, N2 ... Nn], wherein n is the natural number greater than 1；
Step 2: pass through said sequence column and backward column count sample sequence；
The average value of first sampled data P1 of computation sequence column and the last one sampled data of opposite sequence Nn first, and then obtain
Sampled value S1 of first sampled point in intermediate time；Then second sampled data P2 of computation sequence column and opposite sequence inverse
The average value of two sampled data N (n-1), and then second sampled point is obtained in the sampled value S2 of intermediate time；Then successively
Analogize, calculates each sampled point in the sampled value of intermediate time；Finally obtained sample sequence [S1, S2 ... Sn] is the time difference
Revised sample sequence.
2. the system based on multichannel AD sampled time skew synchronous method described in claim 1, it is characterised in that: include at least:
Label sampling module: being marked and sample to multiple sampling channels, specifically:
It is directed to n sampling channel, the Cn that is respectively labeled as C1, C2 ... is successively adopted according to predetermined order C1, C2 ... Cn
Sample obtains sequence in turn and arranges [P1, P2 ... Pn], and according to backward Cn, C (n-1) ..., C1 successively samples and then obtain opposite sequence
[N1, N2 ... Nn], wherein n is the natural number greater than 1；
Calculate sample sequence module: by said sequence column and backward column count sample sequence；
The average value of first sampled data P1 of computation sequence column and the last one sampled data of opposite sequence Nn first, and then obtain
Sampled value S1 of first sampled point in intermediate time；Then second sampled data P2 of computation sequence column and opposite sequence inverse
The average value of two sampled data N (n-1), and then second sampled point is obtained in the sampled value S2 of intermediate time；Then successively
Analogize, calculates each sampled point in the sampled value of intermediate time；Finally obtained sample sequence [S1, S2 ... Sn] is the time difference
Revised sample sequence.
3. a kind of computer program for realizing multichannel AD sampled time skew synchronous method described in claim 1.
4. a kind of information data processing terminal for realizing multichannel AD sampled time skew synchronous method described in claim 1.
5. a kind of computer readable storage medium, including instruction, when run on a computer, so that computer is executed as weighed
Benefit require 1 described in multichannel AD sampled time skew synchronous method.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111404546A (en) * | 2020-03-16 | 2020-07-10 | 青岛中加特电气股份有限公司 | Method, apparatus and computer-readable storage medium for filtering AD sampling data |
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| CN101764614A (en) * | 2009-12-16 | 2010-06-30 | 南京弘毅电气自动化有限公司 | V-shaped sampling method of AD converter based on FPGA |
| CN102495912A (en) * | 2011-10-26 | 2012-06-13 | 电子科技大学 | Multi-channel high-speed data acquisition system with synchronous correction function |
| CN102946251A (en) * | 2012-11-06 | 2013-02-27 | 中国科学院上海微系统与信息技术研究所 | Method for realizing multi-channel synchronous sampling by multi-channel asynchronous sampling ADC (Analog Digital Converter) |
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| JP2000324088A (en) * | 1999-05-06 | 2000-11-24 | Yamaha Corp | Method and device for serial data transmission and reception |
| CN101764614A (en) * | 2009-12-16 | 2010-06-30 | 南京弘毅电气自动化有限公司 | V-shaped sampling method of AD converter based on FPGA |
| CN102495912A (en) * | 2011-10-26 | 2012-06-13 | 电子科技大学 | Multi-channel high-speed data acquisition system with synchronous correction function |
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Application publication date: 20190319 |