CN102340313B - Sampling point loss testing method, device and system for sampling equipment - Google Patents

Sampling point loss testing method, device and system for sampling equipment Download PDF

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CN102340313B
CN102340313B CN201010617794.8A CN201010617794A CN102340313B CN 102340313 B CN102340313 B CN 102340313B CN 201010617794 A CN201010617794 A CN 201010617794A CN 102340313 B CN102340313 B CN 102340313B
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reference value
detection reference
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value set
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CN102340313A (en
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鲍妍
李立
孙春光
李彬
王玮
范振伟
余建华
付华丰
姜帆
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HANGZHOU PAX ELECTRONIC TECHNOLOGY Co Ltd
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HANGZHOU PAX ELECTRONIC TECHNOLOGY Co Ltd
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Abstract

The invention discloses a sampling point loss testing method, a sampling point loss testing device and a sampling point loss testing system for sampling equipment. The method comprises the following steps of: continuously sampling a single-carrier signal output by a signal source to obtain a plurality of pieces of sampling point data; dividing N sampling points into N/M sections of which each comprises M sampling points; performing fast Fourier transform on the sampling point data in each section, and calculating an absolute value to obtain a spectrum set of the sampling point data of each section; calculating a detection reference value set of the pth section by taking the signal spectrum of the pth section as a reference; obtaining a coordinate distribution graph of detection reference values according to the detection reference value set of the pth section; and judging whether the detection reference values of the pth section are regularly distributed on the coordinate distribution diagraph. By the method, the device and the system, testing efficiency is improved, the signal source is simple and high testing accuracy is achieved.

Description

A method of testing and Apparatus and system are lost in collecting device sampling
Technical field
The present invention relates to a kind of collecting device sampling processing technical field, particularly, a method of testing and Apparatus and system are lost in the collecting device sampling that is specifically related to a kind of all analog signal figure equipment and analog signal figure functional module.
Background technology
Along with the arrival of information age and the appearance of sampling thheorem, the digitlization of information seems more and more important.Application relates to video, image, monitor signal etc.Data acquisition equipment is digitized core means.And the losing whether to put and be directly connected to its effect of collecting device.Especially under to the exigent scene of sampled point continuity, collecting device is lost dot characteristics and will directly be determined the success or failure of acquisition applications.
So the dot characteristics test of losing of collecting device is the most important thing of collecting device test.
Conventionally a kind of method of testing of using is human eye observation.Use capture card to be tested to a regular waveform signal sampling, then sampled point is printed in order at plane coordinate system, observe this waveform whether consistent with original waveform.The problem that this method exists is: owing to losing after the sampled point of small number, be not obvious especially to the waveform influence of printing, in addition the subjectivity of human eye, make test can not judge accurately whether lose a little and lose a position, the more important thing is that sampled point signal data amount is very big, taking ten million as unit, during with human eye test fee, require great effort, sometimes or even can not complete, efficiency is very low.
Another kind of method of testing is to adopt a special signal source, and this signal source sends a Serial No. with certain frequency circulation, and digital value is determined by the range value of signal, this cyclic sequence of collecting device synchronous acquisition.Only need to observe sampled point know no for same cyclic sequence just passable.
But adopt the shortcoming of the method that special signal source tests to be: the first, need the signal source of independent design specialized; The second, relate to stationary problem, the sample frequency of collecting device and phase place need to signal source strict conformance.
Summary of the invention
The object of the present invention is to provide a kind of collecting device sampling to lose a method of testing and Apparatus and system, it has improved testing efficiency, and signal source is simple, and test accuracy is high.
To achieve these goals, the invention provides a kind of collecting device sampling and lose a method of testing, comprise the steps:
Step S1, carries out continuous sampling to the single-carrier signal of signal source output, obtains multiple sampled point signal datas;
Step S2, is divided into N/M section by N sampled point, every section of M sampled point; Wherein, N is integer, the integral multiple that N is M, the integral number power that M is 2;
Step S3, does fast Fourier transform by the sampled point signal data in each section respectively, then takes absolute value, and obtains each section of sampled point signal data frequency spectrum collection;
Step S4, taking p segment signal frequency spectrum as benchmark, calculates the detection reference value set of p section;
Wherein, p is 1,2 ... one of any value among N/M;
Step S5, according to the detection reference value set of p section, obtains the coordinate distribution map of detection reference value; On coordinate distribution map, whether rule distributes the detection reference value that judges p section;
Step S6, if rule distributes, the signal of each section of other except p segment signal is continuous, does not occur losing a situation, the band signal of each section of other except p section is continuous;
If the detection reference value of p section occurs abnormal, j segment signal occurs losing a little, and whole band signal is discontinuous.
More preferably, a method of testing is lost in described collecting device sampling, also comprises the steps:
Step S7, if the whole wave band beyond p section is continuous, taking q segment signal frequency spectrum as benchmark, calculates the detection reference value set of q section; Wherein, q is 1,2 ... any value among N/M, and q ≠ p;
Step S8, according to the detection reference value set of q section, obtains the coordinate distribution map of detection reference value; On coordinate distribution map, whether rule distributes the detection reference value that judges q section;
Step S9, if rule distributes, the signal of each section of other except q segment signal is continuous, does not occur losing a situation, the wave band of judging whole detection does not occur losing a little extremely; If the detection reference value of q section occurs abnormal, j segment signal occurs losing a little, and whole band signal is discontinuous.
More preferably, in described step S1, described single-carrier signal is cos (2 π f 0t), wherein, f 0for single-carrier signal frequency, π=3.1415926 ... for constant; T is the sampling time; Cos () represents cosine function;
Sample frequency is f s;
Described f sand f 0between need to meet Nyquist sampling theorem;
In described step S2, the length M of every section that a described N sampled point is divided into after N/M section exceedes one-period,
Figure GDA0000501521070000031
More preferably, in described step S4, calculate the detection reference value set of p section, be specially:
With p segment signal frequency spectrum S p(k) be benchmark, calculate the detection reference value set of p section sump j = Σ k = 0 M - 1 | S j ( k ) - S p ( k ) | , j = 1 , . . . , N M , j ≠ p ;
More preferably, in described step S7, calculate the detection reference value set of q section, be specially:
With q segment signal frequency spectrum S q(k) be benchmark, calculate the detection reference value set of q section sumq j = Σ k = 0 M - 1 | S j ( k ) - S q ( k ) | , j = 1 , . . . , N M , j ≠ q ;
Also provide a kind of collecting device sampling to lose a testing apparatus for realizing the object of the invention, comprise memory module, segmentation module, sampled data conversion module, detection reference value computing module, judge module, wherein:
Described memory module, carries out continuous sampling, the multiple sampled point signal datas that obtain for storage of collected equipment to the single-carrier signal of signal source output;
Described segmentation module, for N sampled point is divided into N/M section, every section of M sampled point; Wherein, N is integer, the integral multiple that N is M, the integral number power that M is 2;
Described sampled data conversion module, does fast Fourier transform for the sampled point signal data of each section respectively described segmentation module segmentation being obtained, and then takes absolute value, and obtains the frequency spectrum set of each section of sampled point signal data;
Described detection reference value computing module, as benchmark, calculates the detection reference value set of p section for the p segment signal frequency spectrum that obtains taking described sampled data conversion module;
Wherein, p is 1,2 ... one of any value among N/M;
Described judge module, for obtaining the coordinate distribution map of detection reference value according to the detection reference value set of p section; On coordinate distribution map, whether rule distributes the detection reference value that judges p section; If rule distributes, the signal of each section of other except p segment signal is continuous, does not occur losing a situation, and the band signal of each section of other except p section is continuous; If the detection reference value of p section occurs abnormal, j segment signal occurs losing a little, and whole band signal is discontinuous.
More provide a kind of collecting device sampling test macro for realizing the object of the invention, comprise signal generator, signal collecting device, a testing apparatus is lost in collecting device sampling;
A testing apparatus is lost in described collecting device sampling, comprises memory module, segmentation module, and sampled data conversion module, detection reference value computing module, judge module, wherein:
Described memory module, carries out continuous sampling for storing to the single-carrier signal of described collecting device output, the N obtaining a continuous sampled point signal data; Wherein, N is integer;
Described segmentation module, for the N of a multiple sampled points sampled point is divided into N/M section, every section of M sampled point; Wherein, the integral multiple that N is M, the integral number power that M is 2;
Described sampled data conversion module, does fast Fourier transform for the sampled point signal data of each section respectively described segmentation module segmentation being obtained, and then takes absolute value, and obtains each section of sampled point signal data frequency spectrum collection;
Described detection reference value computing module, as benchmark, calculates the detection reference value set of p section for the p segment signal frequency spectrum that obtains taking described sampled data conversion module;
Wherein, p is 1,2 ... one of any value among N/M;
Described judge module, for obtaining the coordinate distribution map of detection reference value according to the detection reference value set of p section; On coordinate distribution map, whether rule distributes the detection reference value that judges p section; If rule distributes, the signal of each section of other except p segment signal is continuous, does not occur losing a situation, and the band signal of each section of other except p section is continuous; If the detection reference value of p section occurs abnormal, j segment signal occurs losing a little, and whole band signal is discontinuous.
Beneficial effect of the present invention a: method of testing and Apparatus and system are lost in collecting device sampling of the present invention, without the direct observed samples point of human eye, after only needing to observe computing, whether distribution of results occurs extremely, and " extremely " has very significantly feature, easily identification, make test more objective, and improved testing efficiency; Signal source is simple, needs only with conventional signal generator; Test accuracy is high, as long as lose a sampled point, will, by very significantly showing on operation result, have very strong operability.
Brief description of the drawings
Fig. 1 is that a method of testing flow chart is lost in the collecting device sampling of the embodiment of the present invention;
Fig. 2 is embodiment test result regularity of distribution schematic diagram;
Fig. 3 is embodiment test result abnormal distribution schematic diagram;
Fig. 4 is the structural representation that a testing apparatus is lost in the collecting device sampling of the embodiment of the present invention;
Fig. 5 is the structural representation that a test macro is lost in the collecting device sampling of the embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, to collecting device of the present invention, sampling is lost a method of testing and Apparatus and system is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Below in conjunction with each accompanying drawing, the specific implementation method of successively collecting device sampling of the present invention being lost to a method of testing and Apparatus and system is described in further detail.
A method of testing is lost in collecting device sampling of the present invention, as shown in Figure 1, comprises the steps:
Step S1, carries out continuous sampling to the single-carrier signal of signal source output, obtains N sampled point signal data;
As a kind of embodiment, to single-carrier signal cos (the 2 π f of signal source (as signal generator) output 0t) carry out continuous sampling, sample frequency is f s, obtain N sampled point signal data set s i; I=1,2 ..., N; Wherein, f 0for single-carrier signal frequency, π=3.1415926 ... for constant; T is the sampling time; Cos () represents cosine function.
Preferably, described f sand f 0between need meet be Qwest (Nyquist) sampling thheorem.
Described collecting device includes but not limited to various signal generator of the prior art.
Step S2, is divided into N/M section by N sampled point, every section of M sampled point s k, k=0,1 ..., M-1;
Preferably, wherein, the integral multiple that N is M, the integral number power that M is 2; Every segment length exceedes one-period,
Figure GDA0000501521070000061
As a kind of embodiment, can use f 0the cosine signal of=100kHz, as signal source, is selected sample frequency f sfor being greater than the numerical value of 5MHz; Sampled point N is chosen as 20480000, and section length M is 2048.Should be understandable that; the parameters such as the signal source that the embodiment of the present invention is selected are only as a kind of enforcement reference; it is not intended protection range of the present invention to limit; those skilled in the art can be according to testing requirement; without any need for creative work, and select corresponding satisfactory detected parameters.
Step S3, does the sampled point signal data in each section respectively fast Fourier transform (Fast Fourier Transformation, FFT), then takes absolute value, and obtains the set of each section of sampled point signal data frequency spectrum, i.e. frequency spectrum collection;
As a kind of embodiment, particularly, respectively the sampled point signal data in each section is done to fast Fourier transform (FFT), then take absolute value, obtain each section of sampled point signal data frequency spectrum collection S j(k); K=0,1 ..., M-1; J=1,2 ...,
Figure GDA0000501521070000062
Step S4, taking p segment signal frequency spectrum as benchmark, calculates the detection reference value set of p section;
Wherein, p is 1,2 ... one of any value among N/M.
Particularly, with p segment signal frequency spectrum S p(k) be benchmark, calculate the detection reference value set of p section sump j = Σ k = 0 M - 1 | S j ( k ) - S p ( k ) | , j = 1,2 , . . . , N M , j ≠ p ;
Step S5, according to the detection reference value set sump of p section j, j=1,2 ..., obtain the coordinate distribution map of detection reference value; Judge the detection reference value sump of p section jon coordinate distribution map, whether rule distributes;
Step S6, if rule distributes, the signal of each section of other except p segment signal is continuous, does not occur losing a situation, the band signal of each section of other except p section is continuous;
If the detection reference value sump of p section jone of (be in detection reference value set) occurs abnormal, and j segment signal occurs losing a little, and whole band signal is discontinuous.
In the embodiment of the present invention, described rule distributes and refers to each detection reference value sumP in coordinate distribution map jjunction curve between point is level and smooth under rectangular coordinate system, if exist certain point significantly outside this smoothed curve, thinks abnormal, and non-rule distributes, and the diagram of level and smooth and abnormal two kinds of situations as shown in Figures 2 and 3.
The embodiment of the present invention proves through repetition test, once wave band occurs extremely, utilizing the method for the embodiment of the present invention, just can be easy to be distinguished abnormal wave band, has operability.
Whether preferably, occur losing a little, and lose the reliability of a testing result taking p section as benchmark in order further to detect p section, a method of testing is lost in collecting device sampling of the present invention, also comprises the following steps:
Step S7, if the whole wave band beyond p section is continuous, i.e. the detection reference value sumP of p section jon coordinate distribution map, rule distributes, with q segment signal frequency spectrum S q(k) be benchmark, calculate the detection reference value set of q section sumq j = Σ k = 0 M - 1 | S j ( k ) - S q ( k ) | , j = 1,2 , . . . , N M , j ≠ q ; Wherein, q is 1,2 ... any value among N/M, and q ≠ p;
Step S8, according to the detection reference value set sumq of q section j, j=1,2 ...,
Figure GDA0000501521070000072
obtain the coordinate distribution map of detection reference value; Judge the detection reference value sumq of q section jon coordinate distribution map, whether rule distributes;
Step S9, if rule distributes, the signal of each section of other except q segment signal is continuous, there is not losing a situation, the band signal of each section of other except q section is continuous, because of q ≠ p, so, the wave band that can judge whole detection does not occur losing a little abnormal, has further checked the reliability of losing a testing result of p section yet;
If the detection reference value sumq of q section jone of (be in detection reference value set) occurs abnormal, j segment signal occurs losing a little, and whole band signal is discontinuous, and it shows or p section is deposited a situation of a little losing, or the testing result of p section is unreliable, need further to detect or again detect.
Illustrate collecting device of the present invention sampling below and lose a method of testing step 4,5 implementation procedure, as shown in Figure 1:
Taking the 1st segment signal as benchmark, calculate the detection reference value set of the 1st section sum 1 j = Σ k = 0 M - 1 | S j ( k ) - S 1 ( k ) | , j = 2 , . . . , N M ;
According to the detection reference value set sum1 of the 1st section j, j=2 ...,
Figure GDA0000501521070000082
obtain the coordinate distribution map of detection reference value;
Judge the detection reference value sum1 of the 1st section jon coordinate distribution map, whether rule distributes;
If rule distributes, other each section the signals except the 1st segment signal are continuous, do not occur losing a situation, and other each section the band signal except the 1st section are continuous;
If the detection reference value sum1 of the 1st section jone of (be in detection reference value set) occurs abnormal, and j segment signal occurs losing a little, and whole band signal is discontinuous.
If the whole wave band beyond the 1st section is continuous, i.e. the detection reference value sum1 of the 1st section jon coordinate distribution map, rule distributes, and taking the 2nd segment signal as benchmark, calculates the detection reference value of the 2nd section sum 2 j = Σ k = 0 M - 1 | S j ( k ) - S 2 ( k ) | , j = 1 , 3 , . . . , N M ;
According to the detection reference value set sum2 of the 2nd section j, j=0,1 ...,
Figure GDA0000501521070000084
obtain the coordinate distribution map of detection reference value;
Judge the detection reference value sum2 of the 2nd section jon coordinate distribution map, whether rule distributes;
If rule distributes, other each section the signals except the 2nd segment signal are continuous, there is not losing a situation, other each section the band signal except the 2nd section are continuous, the wave band that can judge whole detection does not occur losing a little extremely, has further checked the reliability of losing a testing result of the 1st section yet;
If the detection reference value sum2 of the 2nd section jone of (be in detection reference value set) occurs abnormal, j segment signal occurs losing a little, and whole band signal is discontinuous, its show or the 1st section deposit and a little lose a situation, or the testing result of the 1st section is unreliable, need further to detect or again detect.
As a kind of embodiment, wherein the 1st section, the 2nd section, can be also other section and realize the method for testing of the embodiment of the present invention.
As the enforceable mode of one, the present invention also loses a method of testing according to described collecting device sampling, provide a kind of collecting device sampling to lose a testing apparatus 1, as shown in Figure 4, it comprises memory module 11, segmentation module 12, sampled data conversion module 13, detection reference value computing module 14, judge module 15, wherein:
Memory module 11, carries out continuous sampling for storage to the single-carrier signal of signal source (as signal generator) output, the N obtaining a continuous sampled point signal data;
Segmentation module 12, for the N of a multiple sampled points sampled point is divided into N/M section, every section of M sampled point s k, k=0,1 ..., M-1;
Sampled data conversion module 13, does fast Fourier transform (FFT) for the sampled point signal data of each section respectively segmentation module segmentation being obtained, and then takes absolute value, and obtains each section of sampled point signal data frequency spectrum collection;
Detection reference value computing module 14, as benchmark, calculates the detection reference value set of p section for the p segment signal frequency spectrum that obtains taking sampled data conversion module 13;
Wherein, p is 1,2 ... one of any value among N/M.
Judge module 15, for obtaining the coordinate distribution map of detection reference value according to the detection reference value set of p section; On coordinate distribution map, whether rule distributes the detection reference value that judges p section; If rule distributes, the signal of each section of other except p segment signal is continuous, does not occur losing a situation, and the band signal of each section of other except p section is continuous; If the detection reference value of p section occurs abnormal, j segment signal occurs losing a little, and whole band signal is discontinuous.
Preferably, described detection reference value computing module 14, if also continuous for the whole wave band beyond p section, the detection reference value set of p section rule on coordinate distribution map distributes,, taking q segment signal frequency spectrum as benchmark, calculate the detection reference value set of q section;
Wherein, q is 1,2 ... any value among N/M, and q ≠ p;
Described judge module 15, also for obtaining the coordinate distribution map of detection reference value according to the detection reference value set of q section; On coordinate distribution map, whether rule distributes the detection reference value that judges q section; If rule distributes, the signal of each section of other except q segment signal is continuous, does not occur losing a situation, and the band signal of each section of other except q section is continuous; If the detection reference value of q section occurs abnormal, j segment signal occurs losing a little, and whole band signal is discontinuous.
As a kind of embodiment, a testing apparatus 1 is lost in collecting device sampling in the embodiment of the present invention, to lose with collecting device sampling of the present invention the process work that a method of testing is identical, therefore, in embodiments of the present invention, a testing apparatus is lost in collecting device sampling to the embodiment of the present invention, is no longer repeated in this description in detail one by one.
Can implementation as one, a testing apparatus 1 is lost in the collecting device sampling of the embodiment of the present invention, can be Computing platform.As another kind of embodiment, the Computing platform that a testing apparatus is realized is lost in the collecting device sampling of the embodiment of the present invention, also can there is other arithmetic unit, as FPGA system or single-chip microcomputer or dsp chip, replace computer platform to realize calculating process.
As shown in Figure 5, for the collecting device sampling test system structure schematic diagram that a testing apparatus 1 and signal generator 2 (signal source), signal collecting device 3 form is lost in the collecting device sampling of the embodiment of the present invention.
Signal generator 2 is signal source, and its effect is to produce single-carrier signal; This single-carrier signal is through the sample image data of post-sampling point of signal collecting device 3, and acquired data storage is sampled and lost in the memory module 11 of a testing apparatus 1 to collecting device.
Collecting device sampling is lost a testing apparatus 1 for Computing platform, it is sampled signal collecting device 3 sampled datas to lose a test, and operation result can be shown at display by Computing platform, judge collecting device and lose a test result thereby utilize.
Similarly, as a kind of embodiment, a test macro is lost in collecting device sampling in the embodiment of the present invention, sampling is wherein lost a testing apparatus to lose with collecting device sampling of the present invention the process work that a method of testing is identical, therefore, in embodiments of the present invention, the collecting device sampling of the embodiment of the present invention is lost to a test macro, be no longer repeated in this description in detail one by one.
A method of testing and Apparatus and system are lost in the collecting device sampling of the embodiment of the present invention, without the direct observed samples point of human eye, after only needing to observe computing, whether distribution of results occurs extremely, and " extremely " has very significantly feature, easily identification, make test more objective, and improved testing efficiency; Signal source is simple, needs only with conventional signal generator; Test accuracy is high, as long as lose a sampled point, will, by very significantly showing on operation result, have very strong operability.
Finally it should be noted that obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if these amendments of the present invention and within modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification.

Claims (4)

1. a method of testing is lost in collecting device sampling, it is characterized in that: comprise the steps:
Step S1, carries out continuous sampling storage by the single-carrier signal that collecting device is exported signal source, obtains multiple sampled point signal datas;
Step S2, is divided into N/M section by N sampled point, every section of M sampled point; Wherein, N is integer, the integral multiple that N is M, the integral number power that M is 2;
Step S3, does fast Fourier transform by the sampled point signal data in each section respectively, then takes absolute value, and obtains the frequency spectrum collection of each section of sampled point signal data;
Step S4, taking p segment signal frequency spectrum as benchmark, calculates the detection reference value set of p section;
Wherein, p is 1,2 ... one of any value among N/M;
The detection reference value set of described calculating p section, is specially:
With p segment signal frequency spectrum S p(k) be benchmark, calculate the detection reference value set of p section sump j = Σ k = 0 M - 1 | S j ( k ) - S p ( k ) | , j = 1,2 , . . . , N M , j ≠ p ;
Step S5, according to the detection reference value set of p section, obtains the coordinate distribution map of detection reference value; On coordinate distribution map, whether rule distributes the detection reference value that judges p section;
Step S6, if rule distributes, the signal of each section of other except p segment signal is continuous, does not occur losing a situation, the band signal of each section of other except p section is continuous;
If the detection reference value of p section occurs abnormal, j segment signal occurs losing a little, and whole band signal is discontinuous;
Step S7, if the whole wave band beyond p section is continuous, taking q segment signal frequency spectrum as benchmark, calculates the detection reference value set of q section; Wherein, q is 1,2 ... any value among N/M, and q ≠ p;
The detection reference value set of described calculating q section, is specially:
With q segment signal frequency spectrum S q(k) be benchmark, calculate the detection reference value set of q section sumq j = Σ k = 0 M - 1 | S j ( k ) - S q ( k ) | , j = 1,2 , . . . , N M , j ≠ q ;
Step S8, according to the detection reference value set of q section, obtains the coordinate distribution map of detection reference value; On coordinate distribution map, whether rule distributes the detection reference value that judges q section;
Step S9, if rule distributes, the signal of each section of other except q segment signal is continuous, does not occur losing a situation, the wave band of judging whole detection does not occur losing a little extremely; If the detection reference value of q section occurs abnormal, j segment signal occurs losing a little, and whole band signal is discontinuous.
2. a method of testing is lost in collecting device sampling according to claim 1, it is characterized in that:
In described step S1, described single-carrier signal is COS (2 π f 0t), wherein, f 0for single-carrier signal frequency, π=3.1415926 ... for constant; T is the sampling time; COS () represents cosine function;
Sample frequency is f s;
Described f sand f 0between need to meet Nyquist sampling thheorem;
In described step S2, the length M of every section that a described N sampled point is divided into after N/M section exceedes one-period,
Figure FDA0000501521060000021
3. a testing apparatus is lost in collecting device sampling, it is characterized in that: comprise memory module, and segmentation module, sampled data conversion module, detection reference value computing module, judge module, wherein:
Described memory module, carries out continuous sampling, the multiple sampled point signal datas that obtain for storage of collected equipment to the single-carrier signal of signal source output;
Described segmentation module, for N sampled point is divided into N/M section, every section of M sampled point; Wherein, N is integer, the integral multiple that N is M, the integral number power that M is 2;
Described sampled data conversion module, does fast Fourier transform for the sampled point signal data of each section respectively described segmentation module segmentation being obtained, and then takes absolute value, and obtains each section of sampled point signal data frequency spectrum collection;
Described detection reference value computing module, as benchmark, calculates the detection reference value set of p section for the p segment signal frequency spectrum that obtains taking described sampled data conversion module;
Wherein, p is 1,2 ... one of any value among N/M;
The detection reference value set of described calculating p section, is specially:
With p segment signal frequency spectrum S p(k) be benchmark, calculate the detection reference value set of p section sump j = Σ k = 0 M - 1 | S j ( k ) - S p ( k ) | , j = 1,2 , . . . , N M , j ≠ p ;
Described judge module, for obtaining the coordinate distribution map of detection reference value according to the detection reference value set of p section; On coordinate distribution map, whether rule distributes the detection reference value that judges p section; If rule distributes, the signal of each section of other except p segment signal is continuous, does not occur losing a situation, and the band signal of each section of other except p section is continuous; If the detection reference value of p section occurs abnormal, j segment signal occurs losing a little, and whole band signal is discontinuous;
Described detection reference value computing module, if also continuous for the whole wave band beyond p section, the detection reference value of p section rule on coordinate distribution map distributes, and taking q segment signal frequency spectrum as benchmark, calculates the detection reference value set of q section;
Wherein, q is 1,2 ... any value among N/M, and q ≠ p;
The detection reference value set of described calculating q section, is specially:
With q segment signal frequency spectrum S q(k) be benchmark, calculate the detection reference value set of q section sumq j = Σ k = 0 M - 1 | S j ( k ) - S q ( k ) | , j = 1,2 , . . . , N M , j ≠ q ;
Described judge module, also, for according to the detection reference value set of q section, obtains the coordinate distribution map of detection reference value; On coordinate distribution map, whether rule distributes the detection reference value that judges q section; If rule distributes, the signal of each section of other except q segment signal is continuous, does not occur losing a situation, and the wave band of judging whole detection does not occur losing a little extremely; If the detection reference value of q section occurs abnormal, j segment signal occurs losing a little, and whole band signal is discontinuous.
4. a testing apparatus is lost in collecting device sampling according to claim 3, it is characterized in that: it is Computing platform that a testing apparatus is lost in described collecting device sampling, or is FPGA system, or is single-chip microcomputer, or is dsp chip.
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