CN101799513A - Multicore communication cable comprehensive tester - Google Patents
Multicore communication cable comprehensive tester Download PDFInfo
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- CN101799513A CN101799513A CN200910154166A CN200910154166A CN101799513A CN 101799513 A CN101799513 A CN 101799513A CN 200910154166 A CN200910154166 A CN 200910154166A CN 200910154166 A CN200910154166 A CN 200910154166A CN 101799513 A CN101799513 A CN 101799513A
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Abstract
The invention relates to a multicore communication cable comprehensive tester. The tester comprises a line-sequential test signal transmitter and a host. The tester is characterized in that the line-sequential test signal transmitter comprises a coding CPU and a code-sending circuit which is connected with the coding CPU and controlled by the coding CPU; the host comprises a decoding CPU, a code-receiving circuit, a fault range-finding signal transmitting/receiving circuit, a monitor and a keyboard; and the code-receiving circuit, the fault range-finding signal transmitting/receiving circuit, the monitor and the keyboard are separately connected with the decoding CPU, the code-receiving circuit adopts a low-speed AD chip, and the code-receiving circuit and the code-receiving circuit are provided with optocouplers which are separated from a cable to be tested. The tester of the invention has simple structure, low cost, high reliability and high anti-interference performance, and can be used to test long cables and be applicable to the connection and maintenance projects of various cables.
Description
Technical field
The present invention relates to the proving installation of cable, relate in particular to and a kind ofly can be simultaneously locate one by one and identify and the multicore communication cable comprehensive tester of detection streamer fault type and position determination of fault remote multicore communication cable two ends.
Background technology
In the various connections relevant, maintenance engineering with telecommunication cable, construction, maintainer are when installation and maintenance cable process, often run into because the lead number is more and can't distinguish a difficult problem that causes, determine the type of cable fault simultaneously and the workload of break down also increasing construction of distance, maintenance, slow down job schedule, waste a large amount of manpower and materials.Present domestic Related product mainly is confined to the test section, trouble spot, still do not have producer's development and produce this type of comprehensive tester, this series products that sell the home market all is from external import, price is very expensive, the model of wherein German BEHA company development and production be this type of produce market price of 9016 at 592 dollars, this product mainly adopts the principle of electric resistance partial pressure, its shortcoming is the influence that resistance value is subjected to external condition and cable length easily, thereby the accuracy that influence is measured, anti-interference is poor.In addition, because the signal of dividing potential drop is a direct current signal, is difficult on the function and expands, and in use, must introduce a reference ground wire that conduction is good, this makes in the cable detection of long distance and maintenance, has caused unnecessary trouble.
Summary of the invention
The purpose of this invention is to provide a kind of can be under no public loop and two ends cable preface condition of unknown, carry out circuit measuring and finish line preface sign, and carry out determining of Method of Cable Trouble Point, blind zone problem and sampling rate problem have been solved, multicore communication cable comprehensive tester with low cost, it has solved the above-mentioned technical disadvantages of prior art.
Above-mentioned technical purpose of the present invention is achieved by the following technical programs: multicore communication cable comprehensive tester, comprise line preface test signal transmitter and main frame, it is characterized in that: described line preface test signal transmitter comprise coding CPU with coding CPU links to each other and the CPU that encoded controls coding transtation mission circuit; Described main frame comprises decoding CPU, coding receiving circuit, trouble spot distance measuring signal emission/receiving circuit, display and keyboard, described coding receiving circuit, trouble spot distance measuring signal emission/receiving circuit, display and keyboard link to each other with decoding CPU respectively, described coding receiving circuit adopts low speed AD chip, and described coding receiving circuit and described coding transtation mission circuit all are provided with optocoupler and cable under test is isolated.
As preferably, the peripheral interface of described line preface test signal transmitter is 16 cable cleats, has marked the line serial number respectively on described 16 cable cleats.
As preferably, described main frame peripheral interface is provided with 16 cable cleats and trouble spot distance measuring signal transmission/receiving jig, has marked the line serial number respectively on described 16 cable cleats.
As preferably, described coding receiving circuit all is connected with corresponding 16 cable cleats by optocoupler with described coding transtation mission circuit.
The present invention also provides a kind of method of detection streamer fault, it adopts described multicore communication cable comprehensive tester that cable is detected, when carrying out cable preface numbering, the coding transtation mission circuit is connected in an end of many cables, the coding receiving circuit is connected the other end of cable, produce the coded signal of a band sequence number by coding CPU, the coding transtation mission circuit sends the coded signal of this band sequence number by cable, the coding receiving circuit receives the signal of this band sequence number and decodes by decoding CPU, can carry out line preface sign to many cables; When carrying out cable fault type detection and localization of fault, trouble spot distance measuring signal emission/receiving circuit is connected the test starting point of cable, trouble spot distance measuring signal emission/receiving circuit produces a voltage pulse signal, send by cable, so pulse signal does not have reflected back, and then this cable is intact; So the pulse signal reflected back then converts digital signal to through low speed AD chip, compares by decoding CPU analysis and with the primary voltage pulse signal, when the voltage pulse signal waveform distortion of reflected back, and follows clutter, and then this cable has break point; When the voltage pulse signal waveform phase of reflected back is opposite, then the swinging cross point appears in this cable; Can record simultaneously this voltage pulse signal emission and the mistiming of reflecting.
Wherein, the mistiming of mensuration and the transmission speed of voltage pulse signal multiply each other and can get the transmission range of voltage pulse signal, and promptly the trouble spot thus can be to localization of fault to the twice of voltage pulse signal launching site distance.
In sum, the present invention has following beneficial effect:
1, the present invention has adopted software simulation ground connection and need not to use cable branch device with reference to ground wire, can test the cable of bigger length;
2, the present invention adopts low speed A/D chip, and element is few, so low price;
3, the present invention adopts light-coupled isolation, and its testing reliability height has good anti-interference;
4, the present invention is simple in structure, and building block is few, and volume is little, and is portable, simple to operation, is easy to on-the-spot the use;
5, the code detection of the present invention by band SEQ.XFER signal can the detection streamer short circuit, open fault;
6, the detectable trouble spot of the waveform monitoring analysis distance of voltage pulse signal of the present invention.
Description of drawings
Fig. 1 is a system hardware structure block diagram of the present invention;
Fig. 2 is limited long transmission line model;
Theoretical reflection configuration when Fig. 3 is broken string;
Theoretical reflection configuration when Fig. 4 is swinging cross;
Theoretical reflection configuration when Fig. 5 is normal condition;
Fig. 6 is an outside drawing of the present invention;
Fig. 7 is the circuit theory diagrams of line preface test signal transmitter;
Fig. 8 is the circuit theory diagrams of main frame.
Embodiment
Below in conjunction with accompanying drawing invention is described in further detail.
Embodiment 1:
A kind of cable comprehensive tester, its hardware mainly contains two parts: line preface test signal transmitter 7 and main frame 11, its center line preface test signal transmitter comprise coding CPU8 with coding CPU8 links to each other and the CPU8 that encoded controls coding transtation mission circuit 9, main frame 11 comprises decoding CPU3, coding receiving circuit 5, trouble spot distance measuring signal emission/receiving circuit 1, several sections such as display 2 and keyboard 4, described coding receiving circuit 5, trouble spot distance measuring signal emission/receiving circuit 1, display 2 links to each other with decoding CPU3 respectively with keyboard 4, and the CPU3 that decoded controls, described coding receiving circuit 5 adopts low speed AD chip 14, and described coding transtation mission circuit 9 and described coding receiving circuit 5 all are provided with optocoupler 15 isolates with cable under test 6.
The peripheral interface of line preface test signal transmitter 7 is 16 a cable cleat 12, has marked the line serial number on cable cleat 12 respectively, for determining cable pairing result by the coupling of two end datas after finishing in test.
16 cable cleat 12 is provided on the main frame 11 equally, can have disposablely finished the line preface test of 16 cables, improved the efficient of test.Before the test beginning, connect the power supply on line preface test signal transmitter 7 and the main frame 11, select " pairing of line preface " button on the keyboard 4, can in official hour, finish the test job of line preface.Data after test is finished will directly show on display 2, be which number cables by what the coupling of test data is promptly known correspondence, can also know the concrete condition of broken string and swinging cross simultaneously.Obtain breaking and the condition of swinging cross under, the failure cable line of tested cable 6 is connected on the trouble spot distance measuring signal transmission/receiving jig 13 of main frame 11, by selecting " trouble spot range finding " button on the keyboard 4, automatic trouble spot distance measurement function can be finished, the result of test can be on display 2, described equally.
By selecting " making progress " and " downwards " button on the keyboard 4, can the data of testing be shown again, be beneficial to data readback.
Principle of work of the present invention is: when needs carry out circuit measuring and finish line preface sign or the diagnosis of cable fault type, produce the line preface by coding CPU8 and detect coded signal, send coded signal by the coding transtation mission circuit to first via cable, low level is all put on all the other (n-1) roads, promptly realizes the internal system grounding function; And the like, the coding transtation mission circuit of system will produce and send one road coded signal successively, and other roads are the common ground loop.Judge the coded signal receive and decode at the coding receiving circuit to obtain the line order sequenced data, finally on display, describe circuit rank results and the fault type result that test obtains, the broken string of diagnosable cable, two kinds of regular faults of swinging cross.
When need are found range and are fixed a point Method of Cable Trouble Point, can establish limit for length's transmission line model according to transmission line theory, as shown in Figure 2, its wave equation is as follows,
...
L0, M12 in the formula, M21 ... be respectively self-induction and mutual inductance, R0 is an equivalent resistance, i1, i2 ... be electric current.Can obtain theoretical reflected impulse waveform by above-mentioned mathematical model, as Fig. 3,4, cable 16 in 5, test starting point 17, break point 18, swinging cross point 19, can get thus, by to cable one end input voltage pulse, this pulse edge cable is propagated, the velocity of propagation and the light velocity are same rank, do not match when running into impedance, as break point, during swinging cross point, pulse produces reflection, the waveform when utilizing the instrument record reflected signal to get back to measurement point, the mistiming τ of analysis waveform transponder pulse and reflected impulse, the wave velocity v of pulse in cable can obtain impedance and not match a little, be i.e. the trouble spot, distance L=v * τ/2, and by also can obtain the fault characteristic of cable to the analysis of reflection configuration.
By early stage circuit design and experimental demonstration, add the blind area and suppress circuit, isolation transmits, and makes it not enter receiving circuit, and reflected impulse normally enters receiving circuit, the realization blind area suppresses, effectively solve blind zone problem, promptly transponder pulse and reflected impulse are overlapping in the time of a pulse, can't distinguish, can not measure the distance of trouble spot, the problem of test blind area occur.
Utilize the time domain reflectometry detection streamer to need accurately to measure the mistiming of transponder pulse and reflected impulse, therefore very high to the requirement of sampling rate, and the raising of sampling rate can improve the performance requirement to A/D greatly when improving measuring accuracy, thereby has improved the cost of total system greatly.Real-time sampling is followed the Nyquist law, constant duration normally, and its highest sample frequency is the nyquist limit frequency.The present invention utilizes the method for equivalent sampling, and equivalent sampling is meant a plurality of cycle continuous samplings of signal are come signal waveform of reconstruct that sampling system can reappear frequency in the mode of expansion, substantially exceeds the signal waveform of nyquist limit frequency.In the test instrumentation of high sample frequency, reach same sample frequency, than direct application high-speed AD chip Direct Sampling, realize reducing greatly the cost of total system with low speed AD chip 14.
Produce the line preface by the CPU8 that encodes and detect coded signal, make the first via send coded signal by coding transtation mission circuit 9, all the other (n-1) roads are all put low level and promptly are total to ground circuit.Just solved under no public ground circuit and two ends cable preface condition of unknown, carried out circuit measuring, finished the task of line preface sign with software mode.
Claims (5)
1. multicore communication cable comprehensive tester, comprise line preface test signal transmitter (7) and main frame (11), it is characterized in that: described line preface test signal transmitter (7) comprise coding CPU (8) with coding CPU (8) links to each other and the CPU that encoded (8) controls coding transtation mission circuit (9); Described main frame (11) comprises decoding CPU (3), coding receiving circuit (5), trouble spot distance measuring signal emission/receiving circuit (1), display (2) and keyboard (4), described coding receiving circuit (5), trouble spot distance measuring signal emission/receiving circuit (1), display (2) and keyboard (4) link to each other with decoding CPU (3) respectively, described coding receiving circuit (5) adopts low speed AD chip (14), and described coding receiving circuit (5) and described coding transtation mission circuit (9) all are provided with optocoupler (15) isolates with cable under test (6).
2. according to the described multicore communication cable comprehensive tester of claim 1, it is characterized in that: the peripheral interface of described line preface test signal transmitter is 16 cable cleats (12), has marked the line serial number respectively on described 16 cable cleats (12).
3. according to the described multicore communication cable comprehensive tester of claim 1, it is characterized in that: described main frame peripheral interface is provided with 16 cable cleats (12) and trouble spot distance measuring signal transmission/receiving jig (13), has marked the line serial number respectively on described 16 cable cleats (12).
4. according to the described multicore communication cable comprehensive tester of claim 1, it is characterized in that: described coding receiving circuit all passes through optocoupler (15) with described coding transtation mission circuit and is connected with corresponding 16 cable cleats (12).
5. the method for a multicore communication cable integration test, it adopts multicore communication cable comprehensive tester as claimed in claim 1 that cable is detected, when carrying out cable preface numbering, the transtation mission circuit (9) of will encoding is connected in an end of many cables, coding receiving circuit (5) is connected the other end of cable, produce the coded signal of a band sequence number by coding CPU (8), coding transtation mission circuit (9) sends the coded signal of this band sequence number by cable, coding receiving circuit (5) receives the signal of this band sequence number and decodes by decoding CPU (3), can carry out line preface sign to many cables; When carrying out cable fault type detection and localization of fault, trouble spot distance measuring signal emission/receiving circuit (1) is connected the test starting point (17) of cable (16), trouble spot distance measuring signal emission/receiving circuit (1) produces a voltage pulse signal, send by cable (16), so pulse signal does not have reflected back, and then this cable (16) is intact; Pulse signal reflected back like this, then pass through low speed AD chip (14) and convert digital signal to, compare, when the voltage pulse signal waveform distortion of reflected back by decoding CPU (3) analysis and with the primary voltage pulse signal, and follow clutter, then this cable (16) has break point (18); When the voltage pulse signal waveform phase of reflected back is opposite, then swinging cross point (19) appears in this cable (16); Can record simultaneously this voltage pulse signal emission and the mistiming of reflecting.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910154166A CN101799513A (en) | 2009-11-07 | 2009-11-07 | Multicore communication cable comprehensive tester |
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| CN200910154166A CN101799513A (en) | 2009-11-07 | 2009-11-07 | Multicore communication cable comprehensive tester |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963627A (en) * | 2010-09-06 | 2011-02-02 | 杭州华三通信技术有限公司 | Ethernet interface testing clamp |
| CN102141592A (en) * | 2010-12-28 | 2011-08-03 | 北京铁路信号有限公司 | Cable detection method and system |
| CN102193048A (en) * | 2011-05-19 | 2011-09-21 | 郭小定 | Intelligent lead aligner |
| CN103337119A (en) * | 2013-06-08 | 2013-10-02 | 山东康威通信技术股份有限公司 | Burglary-resisting monitoring and positioning method for armored cable |
| CN104035000A (en) * | 2014-06-24 | 2014-09-10 | 威海职业学院 | Precision detection device and method for multi-core cable terminal crimping quality |
| CN104330695A (en) * | 2014-09-26 | 2015-02-04 | 国家电网公司 | Multifunctional secondary cable tester |
| CN104502794A (en) * | 2014-11-26 | 2015-04-08 | 国家电网公司 | Multichannel recording cable wire pairing machine |
| CN104506395A (en) * | 2015-01-09 | 2015-04-08 | 武汉精测电子技术股份有限公司 | Automatic detection device and detection method for communication wire |
| CN104614607A (en) * | 2015-01-23 | 2015-05-13 | 加弘科技咨询(上海)有限公司 | Test method and test system |
| CN104698326A (en) * | 2013-12-04 | 2015-06-10 | 重庆金美通信有限责任公司 | Intelligent multi-core cable detection device and detection method thereof |
| CN107329039A (en) * | 2017-08-30 | 2017-11-07 | 国网安徽省电力公司检修公司 | Cable pairing device based on ultrasonic signal processing and its to line method |
| CN110928285A (en) * | 2018-09-20 | 2020-03-27 | 宝时得科技（中国）有限公司 | Automatic walking equipment and cliff identification method and device thereof |
| CN112180220A (en) * | 2020-08-31 | 2021-01-05 | 山东信通电子股份有限公司 | Time domain reflection signal data acquisition method and device |
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2009
- 2009-11-07 CN CN200910154166A patent/CN101799513A/en active Pending
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963627A (en) * | 2010-09-06 | 2011-02-02 | 杭州华三通信技术有限公司 | Ethernet interface testing clamp |
| CN102141592A (en) * | 2010-12-28 | 2011-08-03 | 北京铁路信号有限公司 | Cable detection method and system |
| CN102141592B (en) * | 2010-12-28 | 2014-07-30 | 北京铁路信号有限公司 | Cable detection method and system |
| CN102193048A (en) * | 2011-05-19 | 2011-09-21 | 郭小定 | Intelligent lead aligner |
| CN102193048B (en) * | 2011-05-19 | 2013-04-10 | 郭小定 | Intelligent lead aligner |
| CN103337119A (en) * | 2013-06-08 | 2013-10-02 | 山东康威通信技术股份有限公司 | Burglary-resisting monitoring and positioning method for armored cable |
| CN103337119B (en) * | 2013-06-08 | 2015-11-18 | 山东康威通信技术股份有限公司 | A kind of method of armored electric cable theft prevention monitoring and location |
| CN104698326A (en) * | 2013-12-04 | 2015-06-10 | 重庆金美通信有限责任公司 | Intelligent multi-core cable detection device and detection method thereof |
| CN104035000A (en) * | 2014-06-24 | 2014-09-10 | 威海职业学院 | Precision detection device and method for multi-core cable terminal crimping quality |
| CN104330695A (en) * | 2014-09-26 | 2015-02-04 | 国家电网公司 | Multifunctional secondary cable tester |
| CN104502794A (en) * | 2014-11-26 | 2015-04-08 | 国家电网公司 | Multichannel recording cable wire pairing machine |
| CN104502794B (en) * | 2014-11-26 | 2017-08-11 | 国家电网公司 | A kind of multitrack recording cable proofreader machine |
| CN104506395A (en) * | 2015-01-09 | 2015-04-08 | 武汉精测电子技术股份有限公司 | Automatic detection device and detection method for communication wire |
| CN104506395B (en) * | 2015-01-09 | 2018-06-15 | 武汉精测电子集团股份有限公司 | Communicate wire rod automatic detection device and detection method |
| CN104614607A (en) * | 2015-01-23 | 2015-05-13 | 加弘科技咨询(上海)有限公司 | Test method and test system |
| CN104614607B (en) * | 2015-01-23 | 2017-09-29 | 加弘科技咨询(上海)有限公司 | A kind of method of testing and test system |
| CN107329039A (en) * | 2017-08-30 | 2017-11-07 | 国网安徽省电力公司检修公司 | Cable pairing device based on ultrasonic signal processing and its to line method |
| CN107329039B (en) * | 2017-08-30 | 2020-09-04 | 国网安徽省电力公司检修公司 | Cable alignment method based on ultrasonic signal processing |
| CN110928285A (en) * | 2018-09-20 | 2020-03-27 | 宝时得科技（中国）有限公司 | Automatic walking equipment and cliff identification method and device thereof |
| CN112180220A (en) * | 2020-08-31 | 2021-01-05 | 山东信通电子股份有限公司 | Time domain reflection signal data acquisition method and device |
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Open date: 20100811 |