CN110275092A - Based on the method for overcoming cable properties overcompensation technology to realize fault location processing - Google Patents
Based on the method for overcoming cable properties overcompensation technology to realize fault location processing Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/088—Aspects of digital computing
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Abstract
The present invention relates to a kind of based on the method for overcoming cable properties overcompensation technology to realize fault location processing, is DTF_Return_Loss including selecting the measurement format of antenna feeder analyzer；Export M measurement data Data [M] of antenna feeder analyzer；Measurement data Data [M] is compensated, compensated new data NData [M] is obtained；DTF_SWR formatted data RData [M] is calculated according to compensated data NData [M]；Judge whether to break down, if it is, calculating position of failure point DTF_Len；Otherwise, fault-free occurs, exit step.Using of the invention based on the method for overcoming cable properties overcompensation technology to realize fault location processing, it is possible that connector loosens during solving communication cable use, the problem of cable failure, solve the problems, such as therefore cause the performance indicator of entire communication cable decline, avoid due to compensation data excessively caused by vacation abort situation.This method keeps data during fault location more accurate, so that position judges more acurrate, obtains true abort situation.
Description
Technical field
The present invention relates to field of telecommunications cables more particularly to cable fault positioning fields, in particular to one kind to be based on overcoming
The method that cable properties overcompensation technology realizes fault location processing.
Background technique
The fault location technology of cable is widely used.Such as the cable for communication, it may go out during use
Situations such as existing connector loosens, cable failure.The performance indicator decline that will lead to entire communication cable in this way, in such case
Under need to carry out fault location using cable fault location technology because naked eyes are difficult fault point.
Traditional Fault Locating Method process is as follows:
1, DTF_Return_Loss format measurement data is obtained；
2, cable properties compensation is carried out to DTF_Return_Loss format measurement data；
3, DTF_SWR formatted data is converted by the cable properties offset data that step 2 generates；
4, the maximum value of DTF_SWR data is found out, if this maximum value is greater than preset threshold value, then it represents that cable is faulty
Occur, and calculates abort situation.If maximum value is not more than preset threshold value, then it represents that cable fault-free.
But the existing defects in traditional Fault Locating Method.Step 2 measures number to DTF_Return_Loss format
According to cable properties compensation is carried out, in this step, if hundred meters of losses of cable are bigger, and the termination distance setting tested
The case where will appear compensation excessive (DTF_Return_Loss data occur being greater than 0) when too long.As shown in Figure 1.Step 4 at this time
The maximum value of DTF_SWR data is found out, and judges whether that it is inaccurate for breaking down with this maximum value, because in such case
Lower appearance is more than that the abort situation of preset threshold is not true abort situation, be due to compensation data excessively caused by vacation
Abort situation, as shown in Figure 2 (cable physical length is 152 meters).In the conventional way in step 2 and step 4 calculating process
All existing defects.
Summary of the invention
The purpose of the present invention is overcoming the above-mentioned prior art, provide it is a kind of meet accuracy, authenticity, at
This is low based on the method for overcoming cable properties overcompensation technology to realize fault location processing.
To achieve the goals above, it is of the invention based on overcome cable properties overcompensation technology realize fault location processing
Method it is as follows:
This is mainly characterized by, institute based on the method for overcoming cable properties overcompensation technology to realize fault location processing
The method stated the following steps are included:
(1) the measurement format for selecting antenna feeder analyzer is DTF_Return_Loss, and the loss value that cable is arranged is 0, if
Set the relative speed V of cable, the distance LX of measurement and measurement points M；
(2) M measurement data Data [M] of antenna feeder analyzer is exported；
(3) distance dstep representated by single measurement point data is calculated, measurement data Data [M] is compensated, is obtained
Compensated new data NData [M]；
(4) DTF_SWR formatted data RData [N] is calculated according to compensated data NData [M]；
(5) judge that first peak value RMax greater than SWR_Limit in RData [N] whether there is, if it is, depositing
In failure, position of failure point DTF_Len is calculated；Otherwise, fault-free occurs, exit step.
Preferably, the step (3) specifically includes the following steps:
(3.1) distance dstep representated by single measurement point data is calculated；
(3.2) compensated data NData [N] is calculated separately according to each data in Data [M].
Preferably, distance dstep representated by single measurement point data is calculated in the step (3.1), specifically:
Distance dstep representated by single measurement point data is calculated according to the following formula:
Wherein, L is cable length.
Preferably, compensated data NData [N] is calculated in the step (3.2), specifically:
Compensated data NData [N] is calculated according to the following formula:
Wherein, Limit is the measuring range of measuring device, and Loss is the loss value of cable, and the value of N is 0,1,2 ... ...,
N-1。
Preferably, the step (4) specifically includes the following steps:
(4.1) intermediate result Rho [M] is calculated；
(4.2) DTF_SWR is calculated, and saves as RData [N].
Preferably, intermediate result Rho [M] is calculated in the step (4.1), specifically:
Calculate intermediate result Rho [M] according to the following formula:
Wherein, the value of N is 0,1,2 ... ..., N-1.
Preferably, RData [N] is calculated in the step (4.2), specifically:
Calculate RData [N] according to the following formula:
Wherein, the value of N is 0,1,2 ... ..., N-1.
Preferably, the step (5) the following steps are included:
(5.1) RData [N] is searched for, obtains first in RData [N] the peak value RMax for being greater than SWR_Limit, it is corresponding
Position in RData [N] is recorded as I；
(5.2) peak value RMax whether is found in judgment step (5.1a), if it is, calculating failure point there are failure
Set DTF_Len；Otherwise, fault-free occurs.
Preferably, position of failure point DTF_Len is calculated in the step (5), specifically:
Position of failure point DTF_Len is calculated according to the following formula:
DTF_Len=I × dstep；
Wherein, I is position of the correspondence of first peak value RMax greater than SWR_Limit in RData [N] in RData [N]
It sets.
Using of the invention based on the method for overcoming cable properties overcompensation technology to realize fault location processing, solve
It is possible that connector loosens during communication cable use, the problem of cable failure, solves therefore cause entire
Communication cable performance indicator decline the problem of, avoid due to compensation data excessively caused by vacation abort situation.This method makes
Data are more accurate during fault location, so that position judges more acurrate, obtain true abort situation.
Detailed description of the invention
Fig. 1 is to compensate excessive schematic diagram in the prior art.
Fig. 2 be in the prior art due to compensation data excessively caused by vacation abort situation schematic diagram.
Fig. 3 is the process of the invention based on the method for overcoming cable properties overcompensation technology to realize that fault location is handled
Figure.
Fig. 4 is of the invention based on the method for overcoming cable properties overcompensation technology to realize fault location processing
DTF_Return_Loss result data schematic diagram.
Fig. 5 is the failure of the invention based on the method for overcoming cable properties overcompensation technology to realize that fault location is handled
Location algorithm test result schematic diagram.
Specific embodiment
It is further to carry out combined with specific embodiments below in order to more clearly describe technology contents of the invention
Description.
It is of the invention should based on the method for overcoming cable properties overcompensation technology to realize fault location processing, including
Following steps:
(1) the measurement format for selecting antenna feeder analyzer is DTF_Return_Loss, and the loss value that cable is arranged is 0, if
Set the relative speed V of cable, the distance LX of measurement and measurement points M；
(2) M measurement data Data [M] of antenna feeder analyzer is exported；
(3) distance dstep representated by single measurement point data is calculated, measurement data Data [M] is compensated, is obtained
Compensated new data NData [M]；
(3.1) distance dstep representated by single measurement point data is calculated；
(3.2) compensated data NData [N] is calculated separately according to each data in Data [M]；
(4) DTF_SWR formatted data RData [N] is calculated according to compensated data NData [M]；
(4.1) intermediate result Rho [M] is calculated；
(4.2) DTF_SWR is calculated, and saves as RData [N]；
(5) judge that first peak value RMax greater than SWR_Limit in RData [N] whether there is, if it is, depositing
In failure, position of failure point DTF_Len is calculated；Otherwise, fault-free occurs, exit step；
(5.1) RData [N] is searched for, obtains first in RData [N] the peak value RMax for being greater than SWR_Limit, it is corresponding
Position in RData [N] is recorded as I；
(5.2) peak value RMax whether is found in judgment step (5.1a), if it is, calculating failure point there are failure
Set DTF_Len；Otherwise, fault-free occurs.
It is calculated as the preferred embodiment of the present invention, in the step (3.1) representated by single measurement point data
Distance dstep, specifically:
Distance dstep representated by single measurement point data is calculated according to the following formula:
Wherein, L is cable length.
As the preferred embodiment of the present invention, compensated data NData [N], tool are calculated in the step (3.2)
Body are as follows:
Compensated data NData [N] is calculated according to the following formula:
Wherein, Limit is the measuring range of measuring device, and Loss is the loss value of cable, and the value of N is 0,1,2 ... ...,
N-1。
As the preferred embodiment of the present invention, intermediate result Rho [M] is calculated in the step (4.1), specifically:
Calculate intermediate result Rho [M] according to the following formula:
Wherein, the value of N is 0,1,2 ... ..., N-1.
As the preferred embodiment of the present invention, RData [N] is calculated in the step (4.2), specifically:
Calculate RData [N] according to the following formula:
Wherein, the value of N is 0,1,2 ... ..., N-1.
As the preferred embodiment of the present invention, position of failure point DTF_Len is calculated in the step (5), specifically:
Position of failure point DTF_Len is calculated according to the following formula:
DTF_Len=I × dstep；
Wherein, I is position of the correspondence of first peak value RMax greater than SWR_Limit in RData [N] in RData [N]
It sets.
In a specific embodiment of the invention, for conventional method, when cable properties compensation is excessive, abort situation is positioned not
Accurate problem, the method for the present invention can be with effective solutions.The innovation of this method is to the overcompensation data being likely to occur
It carries out pretreatment and eliminates cable properties compensation over-education phenomenon, while finding correct position using new fault point positioning method.
The process description of inventive method is as follows:
1, DTF_Return_Loss format measurement data is obtained；
2, DTF_Return_Loss format measurement data is mended using the method for eliminating cable properties overcompensation
It repays；
3, the offset data for generating step 2 is converted into DTF_SWR formatted data；
4, first peak value greater than fault threshold in DTF_SWR formatted data is obtained, if this peak value has explanation
The faulty generation of cable, and calculate abort situation.If this peak value is not present, then it represents that cable fault-free.
The detailed calculating process of specific implementation process is with reference to as follows:
Existing communication cable system, cable length L, the relative speed of cable are V, and the loss value of cable is Loss, failure
Judge that thresholding for SWR_Limit, judges whether this cable system breaks down, it should with the following method:
1, the measurement format for selecting antenna feeder analyzer is DTF_Return_Loss, and the relative speed that cable is arranged is V,
The loss value of cable is 0, and the distance of measurement is LX, and selecting measurement points is M, and wherein LX should meet following formula 1:
2, M measurement data Data [M] of antenna feeder analyzer is exported, so as to the analysis of further algorithm process
3, due to the presence of cable loss, signal after cable by that can decay, so needing to mend measurement data
It repays.The loss of cable can be equivalent to linear impairments, so linear compensation algorithm can be used to mend measurement data Data [M]
It repays, compensated new data saves as NData [M], and compensation process is following (3.1 and 3.2)
3.1 calculate distance representated by single measurement point data, are indicated using dstep, use expression formula 2:
3.2 calculate separately out compensated data according to each data in Data [M], use expression formula 3:
Wherein the value of N is 0,1,2 ... ..., and N-1, Limit represent the measuring range of measuring device.
4, DTF_SWR formatted data is calculated according to compensated data NData [M], saves as RData [M].Calculating process
(4.1 and 4.2) as follows
4.1, which calculate intermediate result, saves as Rho [M], uses expression formula 4:
Wherein the value of N be 0,1,2 ..., N-1.
4.2 according to 4.1 calculated result, calculate DTF_SWR and save as RData [N], use expression formula 5:
Wherein the value of N is 0,1,2 ... ..., N-1.
5, judge whether to break down, if a failure occurs and calculate position of failure point, abort situation saves as DTF_
Len, calculating process are following (5.1 and 5.2)
5.1 search RData [N] obtain first in RData [N] peak value for being greater than SWR_Limit, this peak value are remembered
Record is RMax, and the corresponding position in RData [N] is recorded as I, under be marked with 0 beginning.
If 5.2 have found peak value RMax in step 5.1, show faulty presence, calculate DTF_Len, uses
Expression formula 6；
DTF_Len=I × dstep ... (expression formula 6) is not if find peak value RMax, table in 5.3 steps 5.1
Bright fault-free occurs.
Existing L=152 meters of cable, hundred meters of losses Loss=11.6, relative speed V=0.88 of cable, setting terminate
Measurement distance is LX=800, and the failure standing-wave ratio thresholding of cable is 1.5, and the measuring range of measuring device is Limit=-
110dB。
DTF_Return_Loss result data such as Fig. 4 institute after cable properties compensate excessively is eliminated using the method for the present invention
Show, Fig. 1 and Fig. 4 is compared it can be found that the method for the present invention, which can completely eliminate cable properties, compensates excessive, corresponding DTF_SWR
Data are as shown in figure 5, first peak value greater than 1.5 is the corresponding value in fault point, abort situation 152m in Fig. 5.
Using of the invention based on the method for overcoming cable properties overcompensation technology to realize fault location processing, solve
It is possible that connector loosens during communication cable use, the problem of cable failure, solves therefore cause entire
Communication cable performance indicator decline the problem of, avoid due to compensation data excessively caused by vacation abort situation.This method makes
Data are more accurate during fault location, so that position judges more acurrate, obtain true abort situation.
In this description, the present invention is described with reference to its specific embodiment.But it is clear that can still make
Various modifications and alterations are without departing from the spirit and scope of the invention.Therefore, the description and the appended drawings should be considered as illustrative
And not restrictive.
Claims (9)
1. a kind of based on the method for overcoming cable properties overcompensation technology to realize fault location processing, which is characterized in that described
Method the following steps are included:
(1) the measurement format for selecting antenna feeder analyzer is DTF_Return_Loss, and the loss value that cable is arranged is 0, setting electricity
The relative speed V of cable, the distance LX of measurement and measurement points M；
(2) M measurement data Data [M] of antenna feeder analyzer is exported；
(3) distance dstep representated by single measurement point data is calculated, measurement data Data [M] is compensated, is compensated
New data NData [M] afterwards；
(4) DTF_SWR formatted data RData [N] is calculated according to compensated data NData [M]；
(5) judge that first peak value RMax greater than SWR_Limit in RData [N] whether there is, if it is, there is event
Barrier calculates position of failure point DTF_Len；Otherwise, fault-free occurs, exit step.
2. it is according to claim 1 based on overcome cable properties overcompensation technology realize fault location processing method,
It is characterized in that, the step (3) specifically includes the following steps:
(3.1) distance dstep representated by single measurement point data is calculated；
(3.2) compensated data NData [N] is calculated separately according to each data in Data [M].
3. it is according to claim 2 based on overcome cable properties overcompensation technology realize fault location processing method,
It is characterized in that, distance dstep representated by single measurement point data is calculated in the step (3.1), specifically:
Distance dstep representated by single measurement point data is calculated according to the following formula:
Wherein, L is cable length.
4. it is according to claim 2 based on overcome cable properties overcompensation technology realize fault location processing method,
It is characterized in that, compensated data NData [N] is calculated in the step (3.2), specifically:
Compensated data NData [N] is calculated according to the following formula:
Wherein, Limit is the measuring range of measuring device, and Loss is the loss value of cable, and the value of N is 0,1,2 ... ..., N-1.
5. it is according to claim 1 based on overcome cable properties overcompensation technology realize fault location processing method,
It is characterized in that, the step (4) specifically includes the following steps:
(4.1) intermediate result Rho [M] is calculated；
(4.2) DTF_SWR is calculated, and saves as RData [N].
6. it is according to claim 5 based on overcome cable properties overcompensation technology realize fault location processing method,
It is characterized in that, intermediate result Rho [M] is calculated in the step (4.1), specifically:
Calculate intermediate result Rho [M] according to the following formula:
Wherein, the value of N is 0,1,2 ... ..., N-1.
7. it is according to claim 5 based on overcome cable properties overcompensation technology realize fault location processing method,
It is characterized in that, RData [N] is calculated in the step (4.2), specifically:
Calculate RData [N] according to the following formula:
Wherein, the value of N is 0,1,2 ... ..., N-1.
8. it is according to claim 1 based on overcome cable properties overcompensation technology realize fault location processing method,
It is characterized in that, the step (5) the following steps are included:
(5.1) RData [N] is searched for, obtains first in RData [N] the peak value RMax for being greater than SWR_Limit, corresponds to
Position in RData [N] is recorded as I；
(5.2) peak value RMax whether is found in judgment step (5.1a), if it is, calculating position of failure point there are failure
DTF_Len；Otherwise, fault-free occurs.
9. it is according to claim 1 based on overcome cable properties overcompensation technology realize fault location processing method,
It is characterized in that, position of failure point DTF_Len is calculated in the step (5), specifically:
Position of failure point DTF_Len is calculated according to the following formula:
DTF_Len=I × dstep；
Wherein, I is position of the correspondence of first peak value RMax greater than SWR_Limit in RData [N] in RData [N].
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| CN113484682A (en) * | 2021-07-15 | 2021-10-08 | 保定市毅格通信自动化有限公司 | Distribution line ground fault distance measurement method based on standing wave |
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