CN102663145A - Variable-frequency test data sampling and storage method - Google Patents
Variable-frequency test data sampling and storage method Download PDFInfo
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- CN102663145A CN102663145A CN2012101286308A CN201210128630A CN102663145A CN 102663145 A CN102663145 A CN 102663145A CN 2012101286308 A CN2012101286308 A CN 2012101286308A CN 201210128630 A CN201210128630 A CN 201210128630A CN 102663145 A CN102663145 A CN 102663145A
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Abstract
The invention provides a variable-frequency test data sampling and storage method, which comprises the following steps of: acquiring data at an actual frequency f of 1,000 Hz; respectively storing the acquired data into a cache with n channels according to the channels; setting the acquisition frequency of each channel and acquiring the effective number of data to be stored at each time; and gradually traversing the data from 0 to 999 in the channels of the cache, sequentially compressing the acquired data in the cache in the form of binary according to the sampling frequency of each channel, recording channel information and relevant information on the head and the tail, and storing to a memory. The variable-frequency test data sampling and storage method has the advantages that a data sampling and storage frequency is changed at any time, and the hardware bottom layer configuration is not changed, so that frequent hardware bottom layer operation and calibration work are avoided, and a tester can flexibly select the data to be recorded conveniently.
Description
Technical field
The present invention relates to data processing method, especially a kind of test figure frequency conversion rate sampling and the method for storing.
Background technology
In the prior art, the SF of test figure generally is provided with through the method for hardware switch wire jumper or change configuration function parameter, and for the reliability of warranty test data acquisition, frequency is in case set seldom change.If need to change frequency acquisition, must manually be provided with the wire jumper of hardware, switch etc., or call the bottom hardware configuration function, work efficiency is lower, and it is many to adapt to acquisition channel, the testing experiment requirement that frequency shift is frequent.Frequently change the frequency acquisition of hardware simultaneously, possibly reduce the reliability of acquisition system.
When frequency acquisition is set, at least 4 counter parameters need be set in initialization procedure like certain capture card (PXI-2200): the hits of sweep spacing, SI, the scanning times that once triggers and each scanning.The sampling number of every passage need be set simultaneously.The setting of these parameters must called corresponding configuration function with change before each test, and each change of hardware bottom layer parameter all needs self check again and proofreads measuring error and precision, and process is more loaded down with trivial details.
Summary of the invention
The purpose of this invention is to provide a kind of hardware bottom layer configuration that need not to change; Can change data sampling and stored frequency at any time; Avoided operation of frequent hardware bottom layer and proof-reading, selections need data recorded flexibly, sampling of the rate of test figure frequency conversion easily and the method for storing.
For realizing above-mentioned purpose, test figure frequency conversion rate sampling provided by the invention and the method for storing are provided with data acquisition unit, buffer and storer, and this method may further comprise the steps:
1) said data acquisition unit is the actual frequency image data of 1000Hz with f;
2) data of gathering are stored to the buffer ReadBuf that port number is n respectively by passage, the metadata cache time is 1s, respectively corresponding 1000 data of each passage;
3) the frequency acquisition fn of each passage and obtain each needs stored valid data number according to the frequency acquisition fn that is provided with is set, frequency acquisition fn is 1000, and then per 1 data storage once; Frequency acquisition fn is 100, and then per 10 data storage once; Frequency acquisition fn is 10, and then per 100 data storage once; Frequency acquisition fn is 1, and then per 1000 data storage once;
4) travel through 0-999 the data of each passage in said buffer one by one; SF according to each passage; Compress the image data in the said buffer with binary mode successively, and, be stored to said storer then in data head and data trailer recording channel information and relevant information.
Test figure frequency conversion rate sampling of the present invention and the method for storing, wherein said step (4) may further comprise the steps:
(1) at first travel through the 0th data in each passage buffer memory, each channel data is effectively, and stores said the 0th data successively by the passage order;
(2) then travel through the 1st data in each passage buffer memory, only passage 1 data are effectively, and said the 1st data of storage continue;
(3) similar with step (2), travel through 2-9 data in each passage buffer memory successively, said the 1st data of storage continue;
(4) when the 10th data of each passage of traversal, then passage 1 is effectively with passage 2 data, and the 10th data of storage continue; The rest may be inferred, accomplishes until the 999th data traversal, and each channel data storage of the 1st second finishes;
(5) repeating said steps (1) is accomplished the 2nd second later data storage respectively to step (4);
(6) in data head and trailer record channel information and relevant information, be stored to said storer then.
Test figure frequency conversion rate sampling of the present invention and the method for storing, the channel information that wherein writes down at the data head comprises the SF of total number of channels and each passage, comprises the parameter of the signal that takes off in the relevant information of data trailer record.
Test figure frequency conversion rate of the present invention sampling is with the advantage of the method for storage: change the method for data sampling and storing frequencies at any time through software operation, do not change hardware bottom layer and dispose.Avoid frequent hardware bottom layer operation and proof-reading, made things convenient for the flexible selection of laboratory technician to need data recorded.
Embodiment of the present invention is described in detail with embodiment below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the synoptic diagram of the method channel data cache way of test figure frequency conversion rate sampling of the present invention and storage;
Fig. 2 is the synoptic diagram of the method sampled data scale-of-two compression memory mode of test figure frequency conversion rate sampling of the present invention and storage.
Embodiment
Test figure frequency conversion rate sampling of the present invention and the method for storing; Do not change data acquisition unit, buffer and the storer of hardware bottom layer configuration; Gather and store the interval time of data with software mode control, thereby realize changing at any time data sampling and stored frequency.Simultaneously, utilize binary data format to realize the compression memory of image data, can recombinate to data according to data recording and interpretation demand, and through waveform and textual form output.
Test figure frequency conversion rate sampling of the present invention may further comprise the steps with the method for storage:
1) data acquisition unit is the actual frequency image data of 1000Hz with f;
2) data of gathering are stored to the buffer ReadBuf that port number is n respectively by passage, the metadata cache time is 1s, respectively corresponding 1000 data of each passage;
3) the frequency acquisition fn of each passage and obtain each needs stored valid data number according to the frequency acquisition fn that is provided with is set, frequency acquisition fn is 1000, and then per 1 data storage once; Frequency acquisition fn is 100, and then per 10 data storage once; Frequency acquisition fn is 10, and then per 100 data storage once; Frequency acquisition fn is 1, and then per 1000 data storage once;
4) travel through 0-999 the data of each passage in buffer one by one,,, and, be stored to storer then in head and trailer record channel information and relevant information successively with the image data in the binary mode compressed cache device according to the SF of each passage.Specifically may further comprise the steps:
(1) at first travel through the 0th data in each passage buffer memory, each channel data is effectively, and stores said the 0th data successively by the passage order;
(2) then travel through the 1st data in each passage buffer memory, only passage 1 data are effectively, and said the 1st data of storage continue;
(3) similar with step (2), travel through 2-9 data in each passage buffer memory successively, said the 1st data of storage continue;
(4) when the 10th data of each passage of traversal, then passage 1 is effectively with passage 2 data, and the 10th data of storage continue; The rest may be inferred, accomplishes until the 999th data traversal, and each channel data storage of the 1st second finishes;
(5) repeating said steps (1) is accomplished the 2nd second later data storage respectively to step (4);
(6) in data head and trailer record channel information and relevant information, comprise the SF of total number of channels and each passage, comprise in the relevant information of trailer record the parameter of the signal that takes off being stored to storer then.
To combine embodiment that embodiment of the present invention is elaborated below.
As shown in Figure 1, wherein the frequency acquisition of passage 3 is 10, and per 100 data storage once; Similar, passage 1 per 1 data are stored once, and passage 2 per 10 data are stored once, and passage 4 per 1000 data storages are once.The gray background data are the needs stored valid data among the figure.
As shown in Figure 2; During the binary file storage, top of file travels through 0-999 data of each passage buffer memory then one by one with the byte form successively SF of memory channel sum, each passage; In conjunction with the channel sample frequency, store the valid data of each passage successively.
In the method for test figure frequency conversion rate sampling of the present invention and storage, the data file of storage can be reduced in the channel data buffer.At first read top of file total number of channels and each channel sample frequency, understand each channel data then successively.
Test figure frequency conversion rate sampling of the present invention has realized with the method for storage:
1) changes the method for data sampling and storing frequencies at any time through software operation, do not change the hardware bottom layer configuration.
2) avoid frequent hardware bottom layer operation and proof-reading, made things convenient for the flexible selection of laboratory technician to need data recorded.
Above-described embodiment describes preferred implementation of the present invention; Be not that scope of the present invention is limited; Do not breaking away under the prerequisite that the present invention relates to spirit; Various distortion and improvement that the common engineering technical personnel in this area make technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.
Claims (3)
1. a test figure frequency conversion rate is sampled and the method for storing, and data acquisition unit, buffer and storer are set, and it is characterized in that this method may further comprise the steps:
1) said data acquisition unit is the actual frequency image data of 1000Hz with f;
2) data of gathering are stored to the buffer ReadBuf that port number is n respectively by passage, the metadata cache time is 1s, respectively corresponding 1000 data of each passage;
3) the frequency acquisition fn of each passage and obtain each needs stored valid data number according to the frequency acquisition fn that is provided with is set, frequency acquisition fn is 1000, and then per 1 data storage once; Frequency acquisition fn is 100, and then per 10 data storage once; Frequency acquisition fn is 10, and then per 100 data storage once; Frequency acquisition fn is 1, and then per 1000 data storage once;
4) travel through 0-999 the data of each passage in said buffer one by one; SF according to each passage; Compress the image data in the said buffer with binary mode successively, and, be stored to said storer then in data head and data trailer recording channel information and relevant information.
2. test figure frequency conversion rate sampling according to claim 1 and the method for storing is characterized in that wherein said step (4) may further comprise the steps:
(1) at first travel through the 0th data in each passage buffer memory, each channel data is effectively, and stores said the 0th data successively by the passage order;
(2) then travel through the 1st data in each passage buffer memory, only passage 1 data are effectively, and said the 1st data of storage continue;
(3) similar with step (2), travel through 2-9 data in each passage buffer memory successively, said the 1st data of storage continue;
(4) when the 10th data of each passage of traversal, then passage 1 is effectively with passage 2 data, and the 10th data of storage continue; The rest may be inferred, accomplishes until the 999th data traversal, and each channel data storage of the 1st second finishes;
(5) repeating said steps (1) is accomplished the 2nd second later data storage respectively to step (4);
(6) in data head and trailer record channel information and relevant information, be stored to said storer then.
3. according to claim 1 or 2 said test figure frequency conversion rate samplings and the method for storing; It is characterized in that; The channel information that wherein writes down at the data head comprises the SF of total number of channels and each passage, comprises the parameter of the signal that takes off in the relevant information of data trailer record.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106227085A (en) * | 2016-07-19 | 2016-12-14 | 浙江昱能科技有限公司 | The method of single-chip data sampling processing, system, single-chip microcomputer and photovoltaic DC-to-AC converter |
| CN106855787A (en) * | 2016-12-30 | 2017-06-16 | 深圳市易联网络技术有限公司 | A kind of method of sampling of Internet of Things analog signal |
| CN109241010A (en) * | 2018-09-11 | 2019-01-18 | 中国人民解放军战略支援部队航天工程大学 | A kind of data storage method, stocking system and computer storage medium |
| CN113589124A (en) * | 2021-07-16 | 2021-11-02 | 杭州中安电子有限公司 | Method and device for acquiring variable frequency data |
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| US5997171A (en) * | 1986-02-10 | 1999-12-07 | Texas Instruments Incorporated | Method and system for digital data storage, abstraction and compression to preserve the most useful characteristics of the data |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106227085A (en) * | 2016-07-19 | 2016-12-14 | 浙江昱能科技有限公司 | The method of single-chip data sampling processing, system, single-chip microcomputer and photovoltaic DC-to-AC converter |
| CN106227085B (en) * | 2016-07-19 | 2018-12-18 | 浙江昱能科技有限公司 | Method, system, single-chip microcontroller and the photovoltaic DC-to-AC converter of single-chip data sampling processing |
| CN106855787A (en) * | 2016-12-30 | 2017-06-16 | 深圳市易联网络技术有限公司 | A kind of method of sampling of Internet of Things analog signal |
| CN109241010A (en) * | 2018-09-11 | 2019-01-18 | 中国人民解放军战略支援部队航天工程大学 | A kind of data storage method, stocking system and computer storage medium |
| CN113589124A (en) * | 2021-07-16 | 2021-11-02 | 杭州中安电子有限公司 | Method and device for acquiring variable frequency data |
| CN113589124B (en) * | 2021-07-16 | 2023-11-28 | 杭州中安电子有限公司 | Method and device for collecting variable frequency data |
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