CN103176012B - A kind of oscillograph improving accuracy of measurement and measuring method - Google Patents
A kind of oscillograph improving accuracy of measurement and measuring method Download PDFInfo
- Publication number
- CN103176012B CN103176012B CN201110434961.XA CN201110434961A CN103176012B CN 103176012 B CN103176012 B CN 103176012B CN 201110434961 A CN201110434961 A CN 201110434961A CN 103176012 B CN103176012 B CN 103176012B
- Authority
- CN
- China
- Prior art keywords
- data point
- packet
- memory element
- measurement
- waveform
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005259 measurement Methods 0.000 title claims abstract description 75
- 238000005070 sampling Methods 0.000 claims abstract description 102
- 230000004044 response Effects 0.000 abstract description 8
- FNMKZDDKPDBYJM-UHFFFAOYSA-N 3-(1,3-benzodioxol-5-yl)-7-(3-methylbut-2-enoxy)chromen-4-one Chemical compound C1=C2OCOC2=CC(C2=COC=3C(C2=O)=CC=C(C=3)OCC=C(C)C)=C1 FNMKZDDKPDBYJM-UHFFFAOYSA-N 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 18
- 238000004458 analytical method Methods 0.000 description 17
- 238000010586 diagram Methods 0.000 description 8
- 229920002574 CR-39 Polymers 0.000 description 5
- 230000000875 corresponding Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000007781 pre-processing Methods 0.000 description 2
- 241000731961 Juncaceae Species 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002427 irreversible Effects 0.000 description 1
- 230000005055 memory storage Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000000717 retained Effects 0.000 description 1
- 230000000630 rising Effects 0.000 description 1
- 210000000352 storage cell Anatomy 0.000 description 1
- 230000001131 transforming Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
A kind of oscillograph improving accuracy of measurement and measuring method, described oscillograph includes: memory element, for storing the data point of collection；Peak value sampling unit, for being grouped the data point in described memory element；It is sampled often organizing data point, is often organized maximum and the minima of data point；Measurement data buffer unit, often organizes maximum and the minima of data point for storage；Measuring unit, for using the data point in described measurement data buffer unit to carry out waveform measurement.The maximin often organized, by the data point in oscillograph memory element is sampled packet, is stored in measurement data buffer unit as sample value by the technical scheme of the embodiment of the present invention；In the case of sampling rate is sufficiently large, the profile information as far as possible keeping waveform is complete；The program measures pretreatment to measuring the source data analyzed, and improves and measures the execution efficiency analyzed；Thus between accuracy of measurement and response speed, realize balance.
Description
Technical field
The present invention relates to oscillograph technical field, particularly to a kind of oscillograph improving accuracy of measurement
And measuring method.
Background technology
Utilize digital oscilloscope measured signal can be measured analysis, obtain measurement result.Concrete:
After measured signal is acquired, the collection data point obtained is stored in oscillograph memory element (permissible
It is internal memory or external memory storage), then the collection data point in memory element is measured analysis,
To measurement result.Under equal conditions, gathering data point the most, measurement result is the most accurate.But adopt
Collection data point is the most, then oscillograph needs data volume to be processed the biggest, certainly will reduce oscillographic sound
Answer speed.Therefore needing a balance between the accuracy measured and response speed, meeting the overwhelming majority should
Requirement.
Directly the data point data after gathering are measured analysis unacceptable for most oscillographs, because of
The biggest for measuring the data volume analyzed, the efficiency of analysis is the lowest；Measure the data volume analyzed the biggest,
Then from memory space, the data volume of movement is the biggest, can take substantial amounts of system data bandwidth；Measure and divide
The efficiency of analysis is the lowest, can cause measuring analytical data result and screen display actual waveform is the most corresponding, impact
The normal use of system.
Conventional processing method is that the data point collected is carried out a certain degree of sampling, the most right
Data point after sampling measures analysis.After oversampling, data volume reduces, but have lost simultaneously
Collection point, reduces the accuracy of measurement.Sampling multiple is the biggest, then data volume is the least, and accuracy is the most just
The lowest.Fig. 1 is the principle schematic of the sampling of data of prior art.
In order to improve the response speed of system, should reduce as far as possible and measure the data volume analyzed, i.e. increase and take out
Sample multiple.Conventional sampling approach is equally spaced to be sampled data, chooses one in i.e. every C point
Individual as sample point, C is sampling multiple.Fig. 2 is conventional sampling approach schematic diagram.Wherein, topmost
For the waveform that the data point of acquired original is corresponding, middle sampling multiple C=2, nethermost sampling multiple
C=3.When C is 2, waveform is counted reduction half, and waveform profiles can be said to be complete；When C is 3, waveform
Counting less, waveform profiles distortion simultaneously is the most serious, lost a pulse.
The method using prior art, the increase of sampling multiple reduces measures the data point data volume analyzed,
Reduce the accuracy of measured value simultaneously；And the waveform that the reduction of multiple of sampling causes sampling is counted and is increased,
Oscillograph needs data volume to be processed the biggest, certainly will reduce oscillographic response speed；The most existing
The software processing method of technology is difficult to realize balance between the accuracy measured and response speed.
Summary of the invention
For the defect of prior art, the embodiment of the present invention provides a kind of oscillography improving accuracy of measurement
Device and measuring method, retain the minimax value information of original waveform as far as possible, thus measuring when sampling
Balance is realized between accuracy and response speed.
To achieve these goals, the embodiment of the present invention provides a kind of oscillograph improving accuracy of measurement,
Described oscillograph includes: memory element, for storing the data point of collection；Peak value sampling unit, is used for
Data point in described memory element is grouped；It is sampled often organizing data point, is often organized ripple
The maximum of form point and minima；Measurement data buffer unit, often organizes the maximum of data point for storage
And minima；Measuring unit, for using the data point in described measurement data buffer unit to carry out waveform
Measure.
Described peak value sampling unit includes: parameter determination unit, for determining the ripple in described memory element
Form point number L；Determine the data point number M in described measurement data buffer unit, and grouping number
N=M/2；Described grouping number N is carried out by the data point number L in described memory element modulo operation and
Complementation, respectively obtains sampling multiple C and remainder R；Grouped element, for according to described grouping number
The waveform that N, described sampling multiple C and described remainder R are often organized after determining sampling packet is counted；Sampling unit,
For the often group data point after packet is sampled, often organized maximum and the minima of data point.
Described grouped element, specifically for using described sampling multiple C as the radix often organizing data point, according to
The time sequencing of the data point in described memory element, on the basis of often organizing C data point, by R ripple
Form point adds in described N number of packet, and the waveform obtaining each packet is counted.
Described grouped element includes the one in the following units: the first grouped element, for by described sampling
Multiple C is as often organizing the radix of data point, according to the time sequencing of the data point in described memory element,
Often on the basis of C data point of group, R data point is respectively added to initial R point of described N number of packet
In group, the waveform obtaining each packet is counted；Second grouped element, for using described sampling multiple C as
Often organize the radix of data point, according to the time sequencing of the data point in described memory element, often organize C ripple
On the basis of form point, R data point is respectively added in most end R the packet of described N number of packet,
Waveform to each packet is counted；3rd grouped element, is used for described sampling multiple C as often organizing waveform
The radix of point, according to the time sequencing of the data point in described memory element, at the base often organizing C data point
On plinth, R data point is respectively added in middle R the packet of described N number of packet, obtains each point
The waveform of group is counted；4th grouped element, is used for described sampling multiple C as the radix often organizing data point,
According to the time sequencing of the data point in described memory element, on the basis of often organizing C data point, by R
Individual data point uniformly adds in described N number of packet, and the waveform obtaining each packet is counted.
To achieve these goals, the embodiment of the present invention also provides for a kind of oscillography improving accuracy of measurement
The measuring method of device, described method includes: be grouped by the data point in oscillographic memory element；
It is sampled often organizing data point, is often organized maximum and the minima of data point；To often organize data point
Maximum and minima be stored in measurement data buffer unit；Use in described measurement data buffer unit
Data point carry out waveform measurement.
Described data point in oscillographic memory element is carried out packet comprise determining that described memory element
In data point number L；Determine the data point number M in described measurement data buffer unit, and packet
Number N=M/2；Data point number L in described memory element is carried out delivery fortune to described grouping number N
Calculate and complementation, respectively obtain sampling multiple C and remainder R；According to described grouping number N, described in take out
The waveform that sample multiple C and described remainder R are often organized after determining sampling packet is counted.
Every group after sampling packet is determined according to described grouping number N, described sampling multiple C and described remainder R
Waveform count and include: using described sampling multiple C as the radix often organizing data point, single according to described storage
The time sequencing of the data point in unit, on the basis of often organizing C data point, adds to R data point
In described N number of packet, the waveform obtaining each packet is counted.
R data point adds to described N number of packet include: R data point is respectively added to described N
In initial R the packet of individual packet；Or R data point is respectively added to most end R of described N number of packet
In individual packet；Or R data point is respectively added in middle R the packet of described N number of packet；Or
R data point is uniformly added in described N number of packet by person.
Described method also includes: carry out the data point in described memory element showing pretreatment.
Described display pretreatment includes one or more combinations in following preprocess method: to described storage
Data point in unit is sampled and/or interpolation operation；Checked in memory element by amendment horizontal-shift
Zones of different waveform；Data point in memory element is carried out vertically scale.
The technical scheme of the embodiment of the present invention, will by being grouped the data point gathered in memory element
The maximin often organized is stored in measurement data buffer unit as sample value；Sufficiently large in sampling rate
In the case of, the profile information as far as possible keeping waveform is complete；The program is surveyed measuring the source data analyzed
Amount pretreatment, improves and measures the execution efficiency analyzed；Thus it is real between accuracy of measurement and response speed
Now balance.
Accompanying drawing explanation
Fig. 1 is the sampling of data principle schematic of prior art；
Fig. 2 is conventional sampling approach schematic diagram；
Fig. 3 is the overall flow figure of embodiment of the present invention method；
Fig. 4 is the process schematic that the embodiment of the present invention calculates peak-to-peak value；
Fig. 5 is that the embodiment of the present invention shows and measures the processing procedure schematic diagram using different pieces of information；
Fig. 6 is one of surface chart of the actual measurement of the embodiment of the present invention；
Fig. 7 is the two of the surface chart of the actual measurement of the embodiment of the present invention；
Fig. 8 is the oscillograph functional block diagram of the embodiment of the present invention；
Fig. 9 is the refinement functional block diagram of the embodiment of the present invention oscillographic peak value sampling unit 902.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with this
Accompanying drawing in bright embodiment, is clearly and completely described the technical scheme in the embodiment of the present invention,
Obviously, described embodiment is a part of embodiment of the present invention rather than whole embodiments.Based on
Embodiment in the present invention, those of ordinary skill in the art are obtained under not making creative work premise
The every other embodiment obtained, broadly falls into the scope of the claims in the present invention protection.
The embodiment of the present invention proposes a kind of oscillograph improving accuracy of measurement and measuring method, in sampling
In the case of multiple is sufficiently large, ensureing that the quantity of information of waveform is complete, particularly amplitude information is complete as far as possible
Property.The scheme of the embodiment of the present invention is by the acquired original data point stored in oscillograph memory element
It is grouped, is sampled often organizing collection data point, obtains the maximum in every group and minima,
To compression data；Carry out DATA REASONING according to compression data, obtain measurement result.
In common survey, concern is primarily with the shape information in horizontal and vertical directions, typically
Such as peak-to-peak value, cycle etc..Wherein containing complete in the Waveform caching measured by the measurement requirement of peak-to-peak value
Waveform extreme value information, otherwise measures inaccurate.Use the sample mode of prior art owing to ensureing
The integrity of shape information, the peak-to-peak value information that therefore it obtains is the most inaccurate.
The embodiment of the present invention carries out peak value sampling to the data point data of channel acquisition, it is ensured that hanging down of data point
Straight information is retained.Specifically, the data point gathered is grouped, maximum of sampling out from often group
Minima, maximin sampling obtained leaves in measurement data buffer unit, for measuring process
Analyzing and processing.
Fig. 3 is the overall flow figure of embodiment of the present invention method, as it is shown on figure 3, the method includes:
S301, the data point in oscillographic memory element is grouped；
S302, it is sampled often organizing data point, is often organized maximum and the minima of data point；
S303, the maximum and minima of often organizing data point are stored in measurement data buffer unit；
S304, the data point in described measurement data buffer unit is used to carry out waveform measurement.
Specifically, S301 includes:
Step 1, the data point number L determined in described memory element.
The data point of oscillograph collection is stored in memory element, and the data point in memory element is to measure to divide
The starting resource of analysis waveform, is to measure the analysis getable complete information waveform of process, it is determined that storage
Sampling multiple just can be drawn after data point number L in unit.In different realizations, rising of measurement data
Stock is probably original waveform, it is also possible to waveform after treatment.
Step 2, the data point number M determined in described measurement data buffer unit, and grouping number
N=M/2.
Data point number M in measurement data buffer unit, the waveform that i.e. measuring analysis needs is counted.By
Needing, in often group, two points of sampling, therefore grouping number is the half of M.Measure analytical data amount the fewest, survey
Component analysis process efficiency is the highest.One piece of memory space in measurement data buffer unit correspondence digital oscilloscope.
According to determining and actual measure analysis ripple for measuring the configuration of analysis efficiency and concrete memory space
Counting of shape.
Step 3, the data point number L in described memory element is carried out modulo operation to described grouping number N
And complementation, respectively obtain sampling multiple C and remainder R；If L is less than M, then need not sampling.
Step 4, according to described grouping number N, described sampling multiple C and described remainder R determine sampling packet
After the waveform often organized count.
Name an actual example to the method describing the embodiment of the present invention in detail.
Assuming that the data point number in memory element is L, the data point number in measurement data buffer unit is
M, grouping number N=M/2, sampling multiple is C, and remainder is R.
(1) calculating peak value sampling multiple C and remainder R:
C=L/N--------formula 1]
Formula 1 is modulo operation, with memory element data point number L, grouping number N is carried out modulo operation i.e.
Obtain peak value sampling multiple C.
Simultaneously because every minor peaks sampling has two sample points and is filled in measurement data buffer unit, institute
With actually active M as even number.
R=L%N--------[formula 2]
Formula 2 is complementation.Remainder be used for revising L can not evenly divisible by N in the case of, by remainder R ripple
Form point hashes in each packet, and guarantees that the data point of the measurement data caching after sampling still is able to keep
The Annual distribution of acquired original waveform.
(2) data point packet:
This part describes and how to be grouped, the waveform data points of multiple collections i.e. when the feelings that there is remainder
Under condition, how to determine the sample point number often organized, remainder R data point is hashed in each packet, and
Guarantee that the data point of the caching of the measurement data after sampling still is able to keep the Annual distribution of acquired original waveform.
Following principle is followed in the packet extraction of the embodiment of the present invention: 1, extraction exists the loss of information, is to have
Damage compression, irreversible；2, lossy compression method, abstracting method should as often as possible describe the amplitude information of data point；
3, for can not equal proportion be compressed in the case of, make as far as possible disproportional packet be uniformly distributed, keep original
Gather the Annual distribution of data point.
The method that the present embodiment carries out being grouped includes: using described sampling multiple C as the base often organizing data point
Number, according to the time sequencing of the data point in described memory element, on the basis of often organizing C data point,
Being added in described N number of packet by R data point, the waveform obtaining each packet is counted.
Assuming that waveform to be grouped is counted as L, grouping number is N.
C=L/N；C is sampling multiple, is also the radix often organizing data point.
R=L%N；R is packet remainder, needs to add in N number of packet by this R data point, the most right
R group in N group needs often to organize 1 data point of increase, and the data point number of this R group is C+1.
The present embodiment considers that four kinds of modes are grouped:
1, R data point can be respectively added in initial R the packet of described N number of packet；?
Just the data point number of R group is C+1, and the data point number of remaining group is C；
2, R data point can be respectively added in most end R the packet of described N number of packet；?
The data point number of end R group is C+1, and the data point number of remaining group is C；
3, R data point can be respectively added in middle R the packet of described N number of packet；In now
Between the data point number of R group be C+1, data point number of remaining group is C；
4, R data point uniformly can be added in described N number of packet.
For the 4th kind of uniform packet mode, the present embodiment is carried out by repeating following two step
Packet, the data point number often organized with acquisition:
Step A, T=T+R；T is intermediate variable, is used for adding up remainder, and the initial value of T is 0；
If step B T ＞=N, then T=T%N, will the value of T be again entered as T to N remainder after
Value, and according to the data point order of acquired original, C+1 point subsequently is divided into one group；Otherwise, if
T ＜ N, then according to the data point order of acquired original, be divided into one group by C point subsequently.
With L=33, as a example by M=12, now: C=33/12/2=5；R=33%6=3, N=12/2=6；
Draw after substituting into step A and step B:
For the first time during packet, T=0+R=3 ＜ N, the waveform of first group is counted as C=5 point；
During second time packet, T=3+R=6=N, T=6%6=0, the waveform of second group is counted as C+1=6 point；
During third time packet, T=0+R=3 ＜ N, so the waveform of first group is counted as C=5 point；
Going down successively, that often organizes after being grouped counts respectively 5,6,5,6,5,6.
(3) peak value sampling:
After completing packet, the C often organized or C+1 data point are carried out peak value sampling.
It is ranked up or compares obtaining maximum to C point, minima, in chronological sequence Sequential output.
Assume that one group of waveform point value is: 1,3,5,2,4, the process carrying out peak value sampling seeks to from this
5 points are found out maximin and maximin location.
The result that computer obtains in processing procedure is as follows: maximum is 5, at the 3rd sample point；?
Little value is 1, and at the 1st sample point, then this group is output as 1,5.
Table 1 computer obtains the processing procedure of Min-max
| Waveform point value | Maximum | Maximum value position | Minima | Minima position | |
| Initialize | 0 | 0 | 255 | 0 | |
| 1 | 1 | 1 | 1 | 1 | 1 |
| 2 | 3 | 3 | 2 | 1 | 1 |
| 3 | 5 | 5 | 3 | 1 | 1 |
| 4 | 2 | 5 | 3 | 1 | 1 |
| 5 | 4 | 5 | 3 | 1 | 1 |
Table 1 embodies the computer a kind of common method when carrying out Min-max and comparing, it is assumed that numeral is shown
Ripple device span after AD conversion is 0-255, and therefore original maximum is set to 0, initial minimum
It is set to 255.As a example by the acquisition of maximum, actually used method is:
1) initialized maximum value is 0；
2) each point in traversal group successively；
A, if greater than maximum, using this value as maximum, and record maximum value position；
B, otherwise keep maximum, and maximum value position.
The acquisition methods of minima in like manner can obtain.
(4) analysis is measured:
Obtaining the maximin often organized, and it is single that these extreme value data store measurement data caching
After unit, the method also includes: S304, use the data point in described measurement data buffer unit to carry out ripple
Shape is measured.Embodiment of the present invention user is presented herein below the Wave data in measurement data buffer unit is surveyed
The procedure declaration of component analysis.
1, the calculating process of measurement parameter:
User selects required measure the item, i.e. measurand；
Measure parser and the data in measurement data buffer unit are carried out traversal analysis, calculate basic
Measurement parameter；
According to measuring the measurement parameter that parser analyzes, calculate the value of measure the item.
Measurable parameter includes:
Vertical direction: maximum, minima, peak-to-peak value, top is worth, bottom values, amplitude, meansigma methods,
Root-mean-square, crosses punching, rushes in advance.
Horizontal direction: cycle, frequency, the rise time, fall time, positive pulsewidth, negative pulsewidth, just account for
Empty ratio, negative duty.
2, the process of peak-to-peak value is calculated, as shown in Figure 4:
A, user select peak-to-peak value to measure item by menu or remote command；
B, measurement analysis process, analyze the Wave data of measurement data buffer unit, obtains maximum data point
Value, minimum waveform point value.Waveform point value is the integer value that ADC quantified, and its size is relative with physical values
Should, quantifying because have passed through ADC, needing further process just can revert to absolute physical quantity.
C, measured value transformation process, according to maximum data point, minima data point, obtain data point
Peak-to-peak value.Then physics absolute value is conversed according to current vertical gear (vertical resolution).
Vertical resolution is for representing the electricity of the absolute physical represented by waveform point value of 1 unit of vertical direction
Pressure value.For the ADC of 8 bit resolutions, its vertical resolution is: ADC gamut numerical value/256.
The gamut of ADC is generally mapped to whole vertical screen scope, i.e. screen bottom pair by oscillograph
Answer 0 (255), the most corresponding 255 (0).
The method of Fig. 3 and Fig. 4 is accomplished that a Measurement preprocessing process.Waveform due to oscilloscope display
Data also come from the data point data in memory element, in order to show on screen, and the side of the present embodiment
Method also includes: carry out the data point in described memory element showing pretreatment.Specifically, described display
Pretreatment can include that one or more in following several ways combine:
A, the data point in described memory element is sampled and/or interpolation operation: when in memory element
When waveform counts that showing more than screen counts/show less than screen counts, need its sampling/interpolation；
B, check the zones of different waveform in memory element by amendment horizontal-shift: screen is by amendment water
Flat skew can check different region waveforms, i.e. needs according to screen display location, determines current aobvious
Show the original waveform region that region is corresponding；
C, the data point in memory element is carried out vertically scale: the waveform of memory element comes from collection mould
Block, what it recorded is the AD conversion value of analog waveform.When stopping, can being checked by vertically scale
Waveform details, this is accomplished by memory element waveform is zoomed in and out control, it is achieved extension and the receipts to waveform
Contracting.
The source that in the data of measurement analysis process and screen, the data of display waveform are total is all memory element
Data point data.Fig. 5 is display and measures the processing procedure schematic diagram using different pieces of information.That is, will storage
Cell data carries out showing pretreatment, the data after display pretreatment is used for waveform and shows, and will
Data in described measurement data buffer unit are used for waveform measurement.
Fig. 6 and Fig. 7 is two actual surface charts measured.The underlying parameter of these two surface charts is:
L=112K；M=700*2=1400；C=112K/700=160, wherein L, M, C continue to use definition above.
Fig. 6 shows the result of peak value measurement, and Fig. 7 shows the result of peak value and period measurement.
Corresponding to the method for previous embodiment, the embodiment of the present invention also provides for one can improve accuracy of measurement
Oscillograph, Fig. 8 is the oscillographic functional block diagram of the embodiment of the present invention, as shown in Figure 8, this oscillograph bag
Include: memory element 801, for storing the data point of collection；Peak value sampling unit 802, for by described
Data point in memory element is grouped；It is sampled often organizing data point, is often organized data point
Maximum and minima；Measurement data buffer unit 803, often organizes the maximum and of data point for storage
Little value；Measuring unit 804, for using the data point in described measurement data buffer unit to carry out waveform survey
Amount.
Fig. 9 is the refinement functional block diagram of peak value sampling unit 802, as it is shown in figure 9, peak value sampling unit 802
Including: parameter determination unit 901, for determining the data point number L in described memory element；Determine institute
State the data point number M in measurement data buffer unit, and grouping number N=M/2；By single for described storage
Data point number L in unit carries out modulo operation and complementation to described grouping number N, respectively obtains and takes out
Sample multiple C and remainder R；Grouped element 902, for according to described grouping number N, described sampling multiple C
The waveform often organized after determining sampling packet with described remainder R is counted；Sampling unit 903, after to packet
Often group data point be sampled, often organized maximum and the minima of data point.
The grouped element 902 of the present embodiment, specifically for using described sampling multiple C as often organizing data point
Radix, according to the time sequencing of the data point in described memory element, on the basis of often organizing C data point,
Being added in described N number of packet by R data point, the waveform obtaining each packet is counted.
Alternatively, based on different packet modes, grouped element 902 includes the one in the following units:
First grouped element, is used for described sampling multiple C as the radix often organizing data point, according to described
The time sequencing of the data point in memory element, on the basis of often organizing C data point, by R data point
Being respectively added in initial R the packet of described N number of packet, the waveform obtaining each packet is counted；
Second grouped element, is used for described sampling multiple C as the radix often organizing data point, according to described
The time sequencing of the data point in memory element, on the basis of often organizing C data point, by R data point
Being respectively added in most end R the packet of described N number of packet, the waveform obtaining each packet is counted；
3rd grouped element, is used for described sampling multiple C as the radix often organizing data point, according to described
The time sequencing of the data point in memory element, on the basis of often organizing C data point, by R data point
Being respectively added in middle R the packet of described N number of packet, the waveform obtaining each packet is counted；
4th grouped element, is used for described sampling multiple C as the radix often organizing data point, according to described
The time sequencing of the data point in memory element, on the basis of often organizing C data point, by R data point
Uniformly adding in described N number of packet, the waveform obtaining each packet is counted.
Principle owing to specifically how to be grouped has carried out launching to describe, herein in embodiment of the method part
Repeat no more.
The technical scheme of the embodiment of the present invention by the acquired original data point of memory element is grouped,
The maximin often organized is stored in measurement data buffer unit as sample value；Sufficiently large in sampling rate
In the case of, the profile information as far as possible keeping waveform is complete；The program is carried out measuring the source data analyzed
Measurement preprocessing, improves and measures the execution efficiency analyzed；Thus between accuracy of measurement and response speed
Realize balance.
Above example only in order to the technical scheme of the embodiment of the present invention to be described, is not intended to limit；Although
With reference to previous embodiment, the embodiment of the present invention is described in detail, those of ordinary skill in the art
It is understood that the technical scheme described in foregoing embodiments still can be modified by it, or right
Wherein portion of techniques feature carries out equivalent；And these amendments or replacement, do not make relevant art side
The essence of case departs from the spirit and scope of the embodiment of the present invention each embodiment technical scheme.
Claims (6)
1. the oscillograph that can improve accuracy of measurement, it is characterised in that described oscillograph includes:
Memory element, for storing the data point of collection；
Peak value sampling unit, for being grouped the data point in described memory element；To often organizing waveform
Point is sampled, and is often organized maximum and the minima of data point；
Measurement data buffer unit, often organizes maximum and the minima of data point for storage；
Measuring unit, for using the data point in described measurement data buffer unit to carry out waveform measurement；
Described peak value sampling unit includes:
Parameter determination unit, for determining the data point number L in described memory element；Determine described measurement
Data point number M in data buffer storage unit, and grouping number N=M/2；By in described memory element
Data point number L carries out modulo operation and complementation to described grouping number N, respectively obtains sampling multiple
C and remainder R；
Grouped element, for determining according to described grouping number N, described sampling multiple C and described remainder R
The waveform often organized after sampling packet is counted；
Sampling unit, for being sampled the often group data point after packet, is often organized data point
Big value and minima；
Described grouped element, specifically for using described sampling multiple C as the radix often organizing data point, according to
The time sequencing of the data point in described memory element, on the basis of often organizing C data point, by R ripple
Form point adds in described N number of packet, and the waveform obtaining each packet is counted.
The oscillograph improving accuracy of measurement the most according to claim 1, described grouped element bag
Include the one in the following units:
First grouped element, is used for described sampling multiple C as the radix often organizing data point, according to described
The time sequencing of the data point in memory element, on the basis of often organizing C data point, by R data point
Being respectively added in initial R the packet of described N number of packet, the waveform obtaining each packet is counted；
Second grouped element, is used for described sampling multiple C as the radix often organizing data point, according to described
The time sequencing of the data point in memory element, on the basis of often organizing C data point, by R data point
Being respectively added in most end R the packet of described N number of packet, the waveform obtaining each packet is counted；
3rd grouped element, is used for described sampling multiple C as the radix often organizing data point, according to described
The time sequencing of the data point in memory element, on the basis of often organizing C data point, by R data point
Being respectively added in middle R the packet of described N number of packet, the waveform obtaining each packet is counted；
4th grouped element, is used for described sampling multiple C as the radix often organizing data point, according to described
The time sequencing of the data point in memory element, on the basis of often organizing C data point, by R data point
Uniformly adding in described N number of packet, the waveform obtaining each packet is counted.
3. the oscillographic measuring method that can improve accuracy of measurement, it is characterised in that described method
Including:
Data point in oscillographic memory element is grouped；
It is sampled often organizing data point, is often organized maximum and the minima of data point；
The maximum and minima of often organizing data point are stored in measurement data buffer unit；
The data point in described measurement data buffer unit is used to carry out waveform measurement；
Described data point in oscillographic memory element carried out packet include:
Determine the data point number L in described memory element；
Determine the data point number M in described measurement data buffer unit, and grouping number N=M/2；
Data point number L in described memory element is carried out modulo operation and remainder to described grouping number N
Computing, respectively obtains sampling multiple C and remainder R；
Every group after sampling packet is determined according to described grouping number N, described sampling multiple C and described remainder R
Waveform count；
Every group after sampling packet is determined according to described grouping number N, described sampling multiple C and described remainder R
Waveform count and include:
Using described sampling multiple C as the radix often organizing data point, according to the data point in described memory element
Time sequencing, on the basis of often organizing C data point to, R data point is added described N number of packet
In, the waveform obtaining each packet is counted.
Method the most according to claim 3, it is characterised in that add R data point to described N
Individual packet includes:
R data point is respectively added in initial R the packet of described N number of packet；Or
R data point is respectively added in most end R the packet of described N number of packet；Or
R data point is respectively added in middle R the packet of described N number of packet；Or
R data point is uniformly added in described N number of packet.
Method the most according to claim 3, it is characterised in that described method also includes: to described
Data point in memory element carries out showing pretreatment.
Method the most according to claim 5, it is characterised in that described display pretreatment includes following
One or more combinations in preprocess method:
Data point in described memory element is sampled and/or interpolation operation；
The zones of different waveform in memory element is checked by amendment horizontal-shift；
Data point in memory element is carried out vertically scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110434961.XA CN103176012B (en) | 2011-12-22 | A kind of oscillograph improving accuracy of measurement and measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110434961.XA CN103176012B (en) | 2011-12-22 | A kind of oscillograph improving accuracy of measurement and measuring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103176012A CN103176012A (en) | 2013-06-26 |
| CN103176012B true CN103176012B (en) | 2016-12-14 |
Family
ID=
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5574838A (en) * | 1995-04-24 | 1996-11-12 | National Research Council Of Canada | Method of improving the efficiency of data delivery to an output device |
| JPH09159698A (en) * | 1995-12-11 | 1997-06-20 | Hitachi Denshi Ltd | Waveform memory |
| CN101131404A (en) * | 2006-08-25 | 2008-02-27 | 王悦 | Digital oscillograph and its waveshape displaying method |
| CN101692622A (en) * | 2009-09-28 | 2010-04-07 | 中国电子科技集团公司第四十一研究所 | Data collected wave form displaying method |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5574838A (en) * | 1995-04-24 | 1996-11-12 | National Research Council Of Canada | Method of improving the efficiency of data delivery to an output device |
| JPH09159698A (en) * | 1995-12-11 | 1997-06-20 | Hitachi Denshi Ltd | Waveform memory |
| CN101131404A (en) * | 2006-08-25 | 2008-02-27 | 王悦 | Digital oscillograph and its waveshape displaying method |
| CN101692622A (en) * | 2009-09-28 | 2010-04-07 | 中国电子科技集团公司第四十一研究所 | Data collected wave form displaying method |
Non-Patent Citations (1)
| Title |
|---|
| 数字示波器波形显示处理技术;郭献宏等;《电子质量》;20040730;12-13 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101701973B (en) | Measuring data acquisition device and method thereof | |
| CN102466747B (en) | A kind of measurement data compression display device and control method thereof | |
| CN103308738B (en) | Abnormal waveform recording method for oscilloscope with high capture rate | |
| CN106484803B (en) | A kind of data analysing method and system | |
| CN102998500B (en) | Waveform data processing method for digital three-dimensional oscilloscope | |
| CN102998501B (en) | Method for achieving data compression of digital oscilloscope based on field programmable gata array | |
| CN104132791B (en) | A kind of operational modal analysis experimental technique based on pulse excitation | |
| CN110208589A (en) | A kind of measuring method for waveform and measuring device, digital oscilloscope of time-domain signal | |
| CN102313841A (en) | Use the input and the triggering of difference bitmap | |
| CN102539864B (en) | Digital oscilloscope and signal measurement method | |
| CN102331524A (en) | Density trace measurement and triggering in frequency domain bitmaps | |
| CN100557455C (en) | The method for displaying waveform of logic analyser and logic analyser thereof | |
| CN101706524B (en) | Data collection device and data collection method thereof | |
| CN103176012B (en) | A kind of oscillograph improving accuracy of measurement and measuring method | |
| CN106443115B (en) | Depth-based oscilloscope with storage function | |
| CN105403765A (en) | Amplitude stabilization loop device for pulse power measurement | |
| CN109116183A (en) | Harmonic-model parameter identification method, device, storage medium and electronic equipment | |
| CN109815260B (en) | Waveform display device, waveform parameter statistical method, terminal device and storage medium | |
| CN105517018B (en) | A kind of method and device obtaining location information | |
| CN102354295B (en) | CPU (central processing unit) load testing method for equipment in DCS (distributed control system) | |
| CN104931754B (en) | The method for detecting abnormality of three-dimensional waveform data | |
| CN109991458A (en) | A kind of waveform longitudinal direction average system based on FPGA | |
| CN206460088U (en) | A kind of oscillograph stored based on depth | |
| CN104977556B (en) | The average waveform capture rate method of testing measured based on dead time | |
| CN112067870B (en) | Automatic oscilloscope parameter measuring device and method based on FPGA |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |