CN118041442B - Time-frequency signal quality detection system based on optical fiber time service system - Google Patents
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- H—ELECTRICITY
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Abstract
The invention discloses a time-frequency signal quality detection system based on an optical fiber time service system, which relates to the technical field of signal detection and solves the problems that only the signal is simply determined to have abnormality, but the reason of the abnormality cannot be analyzed in time, and the signal is abnormal in the same kind in the later period, and the invention identifies whether the signal is single signal abnormality or multiple signal abnormality by analyzing the change condition between the time-frequency signal and the oscillator curve; for single signal abnormality, determining whether an oscillator of the single signal abnormality occurs by analyzing numerical value changes in a period corresponding to an internal curve of the single signal abnormality; for multi-signal abnormality, whether the signal is interfered by an external signal is determined by analyzing the change condition between the curve of the multi-signal abnormality and the curve of the oscillator, and the abnormal condition of the abnormal signal is gradually analyzed by adopting different analysis modes, so that the abnormal reason is confirmed in the quality detection process, and the whole process coverage of the quality detection is wider.
Description
Technical Field
The invention relates to the technical field of signal detection, in particular to a time-frequency signal quality detection system based on an optical fiber time service system.
Background
The working principle of the optical fiber time service system is that time frequency signals are transmitted through optical fibers, and the transmission mode has very high accuracy and stability; it can realize long-distance time synchronization, time deviation can be less than 100 picoseconds, and frequency transfer stability reaches very high level.
A time-frequency signal is a representation of a signal that describes the frequency characteristics of the signal over time. It generally involves analysis of the signal in the time and frequency domains to reveal transient characteristics of the signal and the trend of the frequency content over time.
When quality detection is carried out on the time-frequency signal, whether the time-frequency signal has related abnormality is generally determined according to the frequency change between the time-frequency signal and the corresponding generator, but the specific quality detection process is not comprehensive, the abnormality of the signal can only be simply determined, the reason of the abnormality cannot be analyzed in time, and the problem cannot be thoroughly solved in the quality detection process because the signal at the later stage is similar in abnormality.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a time-frequency signal quality detection system based on an optical fiber time service system, which solves the problems that the signal is only determined to be abnormal, but the reason of the abnormality cannot be analyzed in time, and the signal is similar to the abnormality in the later stage.
In order to achieve the above purpose, the invention is realized by the following technical scheme: time frequency signal quality detecting system based on optic fibre time service system includes:
The frequency curve analysis end receives oscillation data of the oscillator and the time-frequency signal, generates an oscillation change curve based on specific changes of the oscillation data, generates a time-frequency change curve based on frequency change values of the time-frequency signal, carries out combination analysis on the oscillation change curve and the time-frequency change curve, and judges whether the time-frequency signal is abnormal or not, wherein the specific modes are as follows:
Marking opposite line segments according to the determined oscillation change curve, marking turning points between the opposite line segments as fluctuation points, taking an initial point as a first group of fluctuation points, and sequentially confirming a plurality of groups of fluctuation points appearing in a subsequent curve;
Confirming a plurality of time periods and curve trends between adjacent fluctuation points, analyzing whether the curve trends of the time-frequency change curves are consistent in the same time period, if so, representing that the time-frequency signals are normal signals, not performing any processing, and if partial or all of the time-frequency signals are inconsistent, representing that the time-frequency signals are abnormal signals, marking inconsistent areas in the time-frequency change curves, and executing a frequency waveform analysis end;
The frequency waveform analysis end analyzes the time-frequency change curve determined to be the abnormal signal, preferentially determines the regular period of the time-frequency signal, searches for a regular area with a rule in the time-frequency change curve and an inconsistent area based on the regular period, determines whether the time-frequency signal is single-signal abnormal or multi-signal abnormal, and executes different subsequent analysis terminals based on the determination result, wherein the specific modes are as follows:
The inconsistent area of the time-frequency change curve is marked as an abnormal area, so that the rest area is a normal area;
Randomly determining a group of line segments between adjacent fluctuation points of the time-frequency change curve from a normal area, calibrating the line segments as to-be-sought segments, horizontally translating the to-be-sought segments forwards or backwards, searching a group of coincident line segments closest to the to-be-sought segments from the time-frequency change curve, recording initial points of the coincident line segments and the to-be-sought segments, and calibrating a time period between the two groups of initial points as a regular period;
Locking an adaptation time point from the normal region according to a regular period based on an initial time point of the abnormal region, wherein the adaptation time point can be obtained by adding a plurality of regular periods to the initial time point or subtracting a plurality of regular periods from the initial time point, and locking a regular region with a regular relation with the abnormal region from the normal region according to the determined adaptation time point based on a specific duration of the abnormal region;
comparing the abnormal area with the regular area, taking an initial time point as a calibration time, sequentially confirming the frequency values of the same time of different areas, if the frequency values of the same time are the same, not performing any processing, and if the frequency values of the same time are different, recording different times C;
Comparing the times C with a preset value Y1, wherein Y1 is the preset value, if C is less than or equal to Y1, executing a single signal abnormality analysis end, and if C is more than Y1, executing a multi-signal abnormality analysis end;
the single signal anomaly analysis end receives the time-frequency change curve, identifies the calibrated anomaly region in the curve, and determines whether the oscillator is abnormal based on the change condition of the anomaly region, wherein the specific mode is as follows:
confirming the existence number of the abnormal areas, and if only one group exists, not performing any processing;
If a plurality of groups of abnormal areas exist, extracting each group of abnormal areas, taking an initial time point as a calibration time, and confirming whether frequency values generated at the same subsequent time are the same or not:
if the frequency values generated at the same moment are the same, the oscillator is represented to be abnormal, an oscillator abnormal signal is generated, and the signal is displayed through a display end;
if the frequency values generated at the same moment are different, generating error signals, and displaying through a display end;
The multi-signal anomaly analysis end receives the time-frequency change curve, identifies the marked anomaly region in the curve, and determines whether the time-frequency signal is interfered by an external electromagnetic signal based on the change condition of the anomaly region, wherein the specific mode is as follows:
determining a comparison area at the same moment from the oscillation change curve based on the abnormal area determined by the time-frequency change curve;
Confirming that frequency values corresponding to different moments in an abnormal region are marked as Y i, and marking frequency values corresponding to different moments in a comparison region as D i, wherein i represents different moments;
Confirm whether the calibrated sets of Y i all satisfy: y i≥Di, if all the signals are satisfied, directly generating electromagnetic interference signals, displaying through a display end, and if all the signals cannot be satisfied, directly generating error signals, and displaying through the display end.
Preferably, the method further comprises:
the frequency adjusting end is mainly used for determining the abnormal frequency of an abnormal region of a time-frequency change curve and then determining the frequency range of signals by adjusting the clock period of the oscillator; the specific method is as follows:
confirming a maximum frequency value and a minimum frequency value of the abnormal region based on the determined abnormal region, and generating an abnormal frequency interval;
And (3) adjusting the clock period T based on T=1/F, wherein F is the signal frequency, T is the clock period, so that the confirmed signal frequency F avoids an abnormal frequency interval, and the confirmed range of the clock period T is taken as a standard range and is adjusted.
The invention provides a time-frequency signal quality detection system based on an optical fiber time service system. Compared with the prior art, the method has the following beneficial effects:
the invention identifies whether the time-frequency signal is abnormal by analyzing the change condition between the time-frequency signal and the curve of the oscillator, and identifies whether the signal is single-signal abnormal or multi-signal abnormal by determining a regular period aiming at the abnormal time-frequency signal;
for single signal abnormality, determining whether an oscillator of the single signal abnormality occurs by analyzing numerical value changes in a period corresponding to an internal curve of the single signal abnormality;
Aiming at the abnormality of multiple signals, whether the signal is interfered by an external signal is determined by analyzing the change condition between the curve of the signal and the curve of the oscillator, and the abnormality of the abnormal signal is gradually analyzed by adopting different analysis modes, so that the abnormality reason is confirmed in the quality detection process, the whole process of the quality detection is wider in coverage, and the generated quality detection effect is better;
for the determined abnormal frequency, the clock period of the oscillator is changed to avoid the abnormal frequency possibly generated by the signal, so that the time-frequency signal generated subsequently is ensured not to be interfered by the same electromagnetic signal, and the overall quality of the subsequent time-frequency signal is ensured.
Drawings
Fig. 1 is a schematic diagram of a principle frame of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1, the application provides a time-frequency signal quality detection system based on an optical fiber time service system, which comprises a frequency curve analysis end, a frequency waveform analysis end, a single signal anomaly analysis end, a multi-signal anomaly analysis end, a frequency adjustment end and a display end;
The frequency curve analysis end is electrically connected with the frequency waveform analysis end input node, the frequency waveform analysis end is electrically connected with the single signal abnormality analysis end and the multi-signal abnormality analysis end input node respectively, the single signal abnormality analysis end and the multi-signal abnormality analysis end are electrically connected with the display end input node, and the frequency adjustment end is in bidirectional connection with the multi-signal abnormality analysis end.
The frequency curve analysis end receives oscillation data of the oscillator and the time frequency signal, generates an oscillation change curve based on specific change of the oscillation data, generates a time frequency change curve based on frequency change numerical values of the time frequency signal, carries out combination analysis on the oscillation change curve and the time frequency change curve, judges whether the time frequency signal is abnormal, specifically, the time frequency signal is generated by the oscillator, the oscillator oscillates to generate corresponding oscillation frequency, the oscillation frequency is the transmission frequency of the time frequency signal, and therefore, based on specific data generated by the oscillator in the oscillation process, whether the transmitted time frequency signal is abnormal or not can be distinguished, and abnormality judgment is carried out;
the specific mode for judging whether the time frequency signal is abnormal is as follows:
according to the determined oscillation change curve, calibrating opposite line segments with opposite trend, calibrating turning points between the opposite line segments as fluctuation points, sequentially confirming a plurality of groups of fluctuation points appearing in subsequent curves by taking initial point positions as a first group of fluctuation points, wherein the horizontal coordinates of the oscillation change curve are time parameters, the vertical coordinates of the oscillation change curve are frequency parameters, the time-frequency change curve is the same, namely the fluctuation points are the turning points in the corresponding curves, wherein when the integral trend of one end of the curve is in a climbing state, the integral trend of the subsequent curve of the curve is in a descending state, so that the point positions between the two curves are the corresponding fluctuation points;
Confirming a plurality of time periods and curve trends between adjacent fluctuation points, analyzing whether the curve trends of the time-frequency change curves are consistent in the same time period, if so, representing that the time-frequency signals are normal signals, not performing any processing, and if partial or all of the time-frequency signals are inconsistent, representing that the time-frequency signals are abnormal signals, marking inconsistent areas in the time-frequency change curves, and executing a frequency waveform analysis end;
Specifically, when the time-frequency signal and the frequency curve of the oscillator are abnormal, the time-frequency signal is different from the oscillator when being changed, the frequency inside the oscillator is changed, so that the corresponding time-frequency signal is problematic, whether the time-frequency signal is abnormal or not can be determined by analyzing the frequency change curve of the oscillator, and the subsequent analysis operation is executed.
The frequency waveform analysis end analyzes a time-frequency change curve determined to be an abnormal signal, preferentially determines a regular period of the time-frequency signal, searches a regular area with a rule in an inconsistent area in the time-frequency change curve based on the regular period, determines whether the time-frequency signal is single-signal abnormal or multi-signal abnormal, and executes different subsequent analysis terminals based on a determination result, wherein the specific substep of determining comprises:
The inconsistent area of the time-frequency change curve is marked as an abnormal area, so that the rest area is a normal area;
Randomly determining a group of line segments between adjacent fluctuation points of a time-frequency change curve from a normal area, calibrating the line segments as line segments to be searched, horizontally translating the line segments to be searched forwards or backwards, searching a group of coincident line segments closest to the line segments to be searched from the time-frequency change curve, recording initial points of the coincident line segments and the line segments to be searched, calibrating a time period between the two groups of initial points as a regular period, specifically, determining how long the time period of the time-frequency signal is repeated through the determined line segments, namely, determining the corresponding regular period, wherein the time period between the two groups of initial points is a regular waveform and not a monotone waveform in the transmission process of the time-frequency signal;
based on the initial time point of the abnormal region, locking the adaptive time point from the normal region according to the regular period, wherein the adaptive time point can be obtained by adding a plurality of regular periods to the initial time point or subtracting a plurality of regular periods from the initial time point, and based on the specific duration of the abnormal region, locking the regular region with a regular relation with the abnormal region from the normal region according to the determined adaptive time point, specifically, the abnormal region and the regular region can be understood as an abnormal line segment and a regular line segment, and are named as regions because the line segment covers the corresponding frequency and time, and is determined as the region;
Comparing the abnormal region with the regular region, taking the initial time point as the calibration time (namely time 0), sequentially confirming the frequency values of the same time of different regions (namely the subsequent time 1, the corresponding frequency values existing in different regions are possibly 3 in the abnormal region and 4 in the regular region) afterwards, if the frequency values of the same time are the same, not performing any processing, and if the frequency values of the same time are different, recording different times C, for example: if a group of frequency values are different, the frequency C is 1, and if five groups of frequency values are different, the frequency C is 5;
Comparing the times C with a preset value Y1, wherein Y1 is a preset value, the specific value is drawn by an operator according to experience, and Y1 is generally taken as a value 3, if C is less than or equal to Y1, a single signal anomaly analysis end is executed (the execution of the analysis end is mainly not caused by the fact that whether the oscillator is abnormal or not, the oscillation data of the oscillator are preset data and are not actual working data at the moment, so that the situation that whether the oscillator is abnormal or not needs to be analyzed is also needed, if the oscillator is in oscillation, though working according to the preset data, the condition that the internal device is not adaptive or other is in oscillation, the situation that the oscillation is abnormal is caused, and the generated time-frequency signal is abnormal is caused), if C is more than Y1, a multi-signal anomaly analysis end is executed, the situation is not generally caused by the oscillator, if the oscillator is continuously abnormal, a self-checking system in the oscillator finds that the oscillator is not running according to the preset data, the oscillator is directly locked, whether the oscillator is abnormal or not needed, the electromagnetic signal is needed to be transmitted in the transmission process, and the electromagnetic signal is needed to be executed at the outside.
The single signal anomaly analysis end receives the time-frequency change curve, identifies the calibrated anomaly region in the curve, and determines whether the oscillator is abnormal based on the change condition of the anomaly region, wherein the determination mode is as follows:
Confirming the existence number of the abnormal areas, if only one group exists, not performing any processing, wherein the situation represents that a certain number of value fluctuation possibly exists, so that the abnormal areas exist in the time-frequency signal, but the whole quality of the whole time-frequency signal is not influenced, and the transmission of the corresponding signal is not influenced;
If there are multiple groups of abnormal areas, extracting each group of abnormal areas, taking the initial time point as the calibration time (namely time 0), and confirming whether the frequency values generated at the same subsequent time are the same or not:
if the frequency values generated at the same moment are the same, the oscillator is represented to be abnormal, an oscillator abnormal signal is generated, and the signal is displayed through a display end;
If the frequency values generated at the same moment have different conditions, generating error signals, displaying the error signals through a display end, wherein the abnormal conditions representing the time-frequency signals cannot be identified, and determining the abnormal conditions of the signals by human intervention of operators.
The multi-signal anomaly analysis end receives the time-frequency change curve, identifies the calibrated anomaly region in the curve, and determines whether the time-frequency signal is interfered by an external electromagnetic signal based on the change condition of the anomaly region, wherein the specific determination mode comprises the following steps:
determining a comparison area at the same moment from the oscillation change curve based on the abnormal area determined by the time-frequency change curve;
Confirming that frequency values corresponding to different moments in an abnormal region are marked as Y i, and marking frequency values corresponding to different moments in a comparison region as D i, wherein i represents different moments;
Confirm whether the calibrated sets of Y i all satisfy: y i≥Di, if all the signals are satisfied, the time-frequency signals are enhanced and interfered by external electromagnetic signals, electromagnetic interference signals are directly generated, the signals are displayed through a display end, if all the signals cannot be satisfied, error signals are directly generated, the signals are displayed through the display end, the abnormal conditions representing the time-frequency signals cannot be identified, and operators are required to manually intervene to determine the abnormal conditions of the signals.
Example two
In the implementation process of the embodiment, compared with the above embodiment, the present embodiment is mainly aimed at the frequency adjustment process of the optical fiber timing system thereof, so as to ensure that the time-frequency signal generated subsequently is not interfered by the electromagnetic signal;
The frequency adjusting end is mainly aimed at an abnormal region of a time-frequency change curve, determines the abnormal frequency of the time-frequency change curve, and then determines the frequency range of signals by adjusting the clock period of the oscillator so as to complete the frequency adjusting work of the whole time-frequency signal;
The specific regulation mode is as follows:
confirming a maximum frequency value and a minimum frequency value of the abnormal region based on the determined abnormal region, and generating an abnormal frequency interval;
Based on t=1++f, where F is the signal frequency, T is the clock period, the clock period T is adjusted to avoid the confirmed signal frequency F from the abnormal frequency interval, so that the range of the confirmed clock period T is used as the standard range, and adjustment is performed;
Specifically, when the adjustment processing is performed, the clock period and the oscillation frequency have a corresponding conversion relation, so that the abnormal frequency interval can be determined based on the corresponding frequency value through the abnormal region in the time-frequency change curve, the external electromagnetic signal can interfere the frequency of the abnormal frequency interval, so that when the corresponding time-frequency signal is generated, the frequency needs to be avoided, and the original range of the clock period needs to be changed, so that the signal frequency is changed;
In summary, when the quality of the time-frequency signal is detected, whether the signal is abnormal is preferentially determined, based on the abnormal condition, the abnormal analysis is performed to determine what type of interference and specific problem the signal is subjected to, and based on the determined result, different processing measures are made to ensure that the quality of the time-frequency signal generated subsequently reaches the standard.
Some of the data in the above formulas are numerical calculated by removing their dimensionality, and the contents not described in detail in the present specification are all well known in the prior art.
The above embodiments are only for illustrating the technical method of the present invention and not for limiting the same, and it should be understood by those skilled in the art that the technical method of the present invention may be modified or substituted without departing from the spirit and scope of the technical method of the present invention.
Claims (3)
1. Time frequency signal quality detecting system based on optic fibre time service system, its characterized in that includes:
The frequency curve analysis end receives oscillation data of the oscillator and the time-frequency signal, generates an oscillation change curve based on specific changes of the oscillation data, generates a time-frequency change curve based on frequency change values of the time-frequency signal, carries out combination analysis on the oscillation change curve and the time-frequency change curve, and judges whether the time-frequency signal is abnormal or not, wherein the specific modes are as follows:
Marking opposite line segments according to the determined oscillation change curve, marking turning points between the opposite line segments as fluctuation points, taking an initial point as a first group of fluctuation points, and sequentially confirming a plurality of groups of fluctuation points appearing in a subsequent curve;
Confirming a plurality of time periods and curve trends between adjacent fluctuation points, analyzing whether the curve trends of the time-frequency change curves are consistent in the same time period, if so, representing that the time-frequency signals are normal signals, not performing any processing, and if partial or all of the time-frequency signals are inconsistent, representing that the time-frequency signals are abnormal signals, marking inconsistent areas in the time-frequency change curves, and executing a frequency waveform analysis end;
The frequency waveform analysis end analyzes the time-frequency change curve determined to be the abnormal signal, preferentially determines the regular period of the time-frequency signal, searches for a regular area with a rule in the time-frequency change curve and an inconsistent area based on the regular period, determines whether the time-frequency signal is single-signal abnormal or multi-signal abnormal, and executes different subsequent analysis terminals based on the determination result, wherein the specific modes are as follows:
The inconsistent area of the time-frequency change curve is marked as an abnormal area, so that the rest area is a normal area;
Randomly determining a group of line segments between adjacent fluctuation points of the time-frequency change curve from a normal area, calibrating the line segments as to-be-sought segments, horizontally translating the to-be-sought segments forwards or backwards, searching a group of coincident line segments closest to the to-be-sought segments from the time-frequency change curve, recording initial points of the coincident line segments and the to-be-sought segments, and calibrating a time period between the two groups of initial points as a regular period;
Locking an adaptation time point from the normal region according to a regular period based on an initial time point of the abnormal region, wherein the adaptation time point can be obtained by adding a plurality of regular periods to the initial time point or subtracting a plurality of regular periods from the initial time point, and locking a regular region with a regular relation with the abnormal region from the normal region according to the determined adaptation time point based on a specific duration of the abnormal region;
comparing the abnormal area with the regular area, taking an initial time point as a calibration time, sequentially confirming the frequency values of the same time of different areas, if the frequency values of the same time are the same, not performing any processing, and if the frequency values of the same time are different, recording different times C;
Comparing the times C with a preset value Y1, wherein Y1 is the preset value, if C is less than or equal to Y1, executing a single signal abnormality analysis end, and if C is more than Y1, executing a multi-signal abnormality analysis end;
the single signal anomaly analysis end receives the time-frequency change curve, identifies the calibrated anomaly region in the curve, and determines whether the oscillator is abnormal based on the change condition of the anomaly region, wherein the specific mode is as follows:
confirming the existence number of the abnormal areas, and if only one group exists, not performing any processing;
If a plurality of groups of abnormal areas exist, extracting each group of abnormal areas, taking an initial time point as a calibration time, and confirming whether frequency values generated at the same subsequent time are the same or not:
if the frequency values generated at the same moment are the same, the oscillator is represented to be abnormal, an oscillator abnormal signal is generated, and the signal is displayed through a display end;
if the frequency values generated at the same moment are different, generating error signals, and displaying through a display end;
The multi-signal anomaly analysis end receives the time-frequency change curve, identifies the marked anomaly region in the curve, and determines whether the time-frequency signal is interfered by an external electromagnetic signal based on the change condition of the anomaly region, wherein the specific mode is as follows:
determining a comparison area at the same moment from the oscillation change curve based on the abnormal area determined by the time-frequency change curve;
Confirming that frequency values corresponding to different moments in an abnormal region are marked as Y i, and marking frequency values corresponding to different moments in a comparison region as D i, wherein i represents different moments;
Confirm whether the calibrated sets of Y i all satisfy: y i≥Di, if all the signals are satisfied, directly generating electromagnetic interference signals, displaying through a display end, and if all the signals cannot be satisfied, directly generating error signals, and displaying through the display end.
2. The fiber time service system-based time-frequency signal quality detection system of claim 1, further comprising:
the frequency adjusting end is used for determining the abnormal frequency of the abnormal region of the time-frequency change curve, and then determining the frequency range of the signal by adjusting the clock period of the oscillator.
3. The system for detecting the quality of time-frequency signals based on the optical fiber time service system according to claim 2, wherein the specific way for the frequency adjustment terminal to adjust the clock period of the oscillator is as follows:
confirming a maximum frequency value and a minimum frequency value of the abnormal region based on the determined abnormal region, and generating an abnormal frequency interval;
And (3) adjusting the clock period T based on T=1/F, wherein F is the signal frequency, T is the clock period, so that the confirmed signal frequency F avoids an abnormal frequency interval, and the confirmed range of the clock period T is taken as a standard range and is adjusted.
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| CN115085831A (en) * | 2022-06-15 | 2022-09-20 | 西京学院 | Unmanned aerial vehicle remote control signal identification system and method based on mixed time-frequency analysis |
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