CN203673014U - Cable check circuit structure - Google Patents
Cable check circuit structure Download PDFInfo
- Publication number
- CN203673014U CN203673014U CN201420053375.XU CN201420053375U CN203673014U CN 203673014 U CN203673014 U CN 203673014U CN 201420053375 U CN201420053375 U CN 201420053375U CN 203673014 U CN203673014 U CN 203673014U
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- cable
- checking
- signal
- circuit
- circuit structure
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Abstract
A cable check circuit structure includes a check signal sending end device circuit and a check signal receiving end device circuit which are connected by a detected cable. The detected cable comprises at least two paths of detected cables. The cable check circuit structure is characterized in that: only a detected cable itself without common reference end is needed by the circuit crossing check signal sending end and the check signal receiving end. Each path of the detected cable check circuit comprises a current-limiting resistor and also comprises a detected cable, an insulation diode and a signal coupler of the check signal receiving end which are sequentially connected from an interface of the check signal sending end. A negative pole of the insulation diode is connected with a positive pole of an input end of the signal coupler. The negative pole of the input end of the signal coupler is connected with the positive pole of the insulation diode. The negative pole of the insulation diode of each path of the detected cable or the positive pole of the input end of the signal coupler is connected by a wire. The cable check circuit structure can be operated by a single person, and the cable is checked quickly and accurately.
Description
Technical field
The utility model relates to the polycore cable long distance line technology of leaving school, and is a kind of cable checking circuit structure specifically.
Background technology
In power and lighting or intelligent system wiring installation, can use in a large number polycore cable as the signal transmission medium between various field controlling instrument, equipment and Central Control Room control system, in the time of construction wiring, need to insulate to cable, conduction property test, especially need to confirm whether two ends correspondence of the corresponding cable marker of each root heart yearn, to guarantee the cable exact connect ion of the various signals of instrument, power supply, be called school line procedures.
Traditional school line method be need two that be skilled in technique and to drawing clearly, the technician of good teamwork, use intercom and multimeter, utilize the concentric lines such as shielding line at cable two ends, by the heart yearn of short-circuiting cable one end one by one, find corresponding heart yearn and measure the method for break-make at the other end with multimeter, link up by intercom communication, take multiple measurements that short circuit, opening operation are confirmed and mark wire size.
But find in real work, because personnel's skills involved in the labour are different, in noisy environment, use intercom to carry out in voice communication process, make the mistake unavoidably or error, in the debugging that powers on subsequently, find instrument cisco unity malfunction, even happen occasionally because false wiring causes the instrument situation of burning, search wiring error and correct and can waste again a large amount of man-hours, and then affecting carrying out smoothly of whole project progress.
Summary of the invention
Technical problem to be solved in the utility model is to address the above problem, and improves the caused various disadvantages of traditional school line method, and a kind of cable checking circuit structure is provided, without concentric line, only one man operation, obtains school toe-in fruit rapidly and accurately, improves school line work efficiency and accuracy.
Described cable checking circuit structure, comprises the checking signal sending ending equipment circuit and the checking signal receiving device circuit that connect by tested cable, and described tested cable at least includes the 2 tested cables in road, it is characterized in that:
The circuit of crossing over checking signal transmitting terminal and checking signal receiving end only needs the tested cable itself without common reference end, and the tested cable checking circuit in each road comprises the signal coupler of current-limiting resistance and the tested cable, isolating diode and the checking signal receiving end that start to be connected successively from checking signal sending ending equipment interface; The anodic bonding of the negative electrode of described isolating diode and signal coupler input end, the negative electrode of signal coupler input end and the anodic bonding of described isolating diode, it is consistent that described current-limiting resistance is serially connected in the current-limiting resistance link position on arbitrary position in above-mentioned circuit front end or circuit and each road, and the described isolating diode cathode terminal of each tested cable line in road or the anode tap of signal coupler input end are connected by wire.
The output terminal of described signal coupler is connected to and receives signal and process or indicating device, exports the checking signal that the checking signal transmitting terminal of this signal coupler place circuit is exported.
A kind of embodiment is that described signal coupler is that input end is the optocoupler of light emitting diode.
Each described tested cable is connected to checking signal generator module at described checking signal transmitting terminal through overdrive circuit.
The utility model compared with prior art, has the following advantages:
1, school line accuracy 100%;
2, can one man operation, avoid the traditional two people matching problem at the school of cable two ends intercommunication line, save communication tool;
3, the control cables of testing (being made as 21 cores), reduce 90% than break-make resistance test service time;
4, do not utilize any bridging line (comprising ground wire), just can carry out school line to cable easily;
6, do not need the school lineman that professional electrician also can complete paired cable to do.
Accompanying drawing explanation
Fig. 1 is the utility model electrical block diagram,
Fig. 2 is a kind of checking signal oscillogram.
In figure: 1-checking signal drive end, 2-current-limiting resistance, 3-tested cable, 4-isolating diode, 5-signal coupler input end, 6-signal coupler, 7-tested cable, 8-driving circuit, 9-checking signal generator module.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated: as shown in fig. 1, described cable checking circuit structure, comprise the checking signal sending ending equipment circuit and the checking signal receiving device circuit that connect by tested cable 3, described tested cable 3 at least includes the 2 tested cables 7 in road.
That optocoupler is as embodiment take signal coupler, the circuit of leap checking signal transmitting terminal and checking signal receiving end only needs without the tested cable 7 of common reference end own, and the tested cable checking circuit in each road comprises the signal coupler 6 of current-limiting resistance 2 and the tested cable 7, isolating diode 4 and the checking signal receiving end that start to be connected successively from checking signal sending ending equipment interface; The negative electrode of described isolating diode 4 and signal coupler input end 5 are the anodic bonding of optocoupler luminotron, the negative electrode of signal coupler input end 5 is the negative electrode of optocoupler luminotron and the anodic bonding of described isolating diode 4, it is consistent that described current-limiting resistance 2 is serially connected in the current-limiting resistance link position on arbitrary position in above-mentioned circuit front end or circuit and each road, before the current-limiting resistance 2 in Fig. 1 is located at the tested cable of checking signal transmitting terminal.Described isolating diode 4 cathode terminals of each tested cable line in road or the anode tap of optocoupler luminotron are connected by wire.
The output terminal of described signal coupler 6 is connected to and receives signal and process or indicating device, exports the checking signal that the checking signal transmitting terminal of this optocoupler place circuit is exported.Each described tested cable 7 is connected to checking signal generator module 9 at described checking signal transmitting terminal through overdrive circuit 8.
Further, in order to realize one man operation, transmitting terminal need to be told receiving end the wire size of transmitting terminal stube cable.Therefore transmitting terminal need to and accurately send the wire size coding of transmit leg.If tested cable has 32 lines, transmitting terminal sends 32 data from 32 connection jaws of transmitting terminal successively: for example connection terminal 0 sends data 0, and connection terminal 1 sends data 1, and connection terminal 2 sends data 2, by that analogy until connection terminal 31 sends data 31, then repeat this process successively.But be that so simple transmission data receiver cannot accurately be resolved, must before sending each data, guarantee that data are synchronous, in this example, send a low level synchronous head that is greater than 2 haplotype data transmitting times, as shown in Figure 2, send the synchronous head of data and the roughly waveform of data.Had synchronous head, receiving end just can first detect this synchronous head, just receives data below after detecting.
Transmitting terminal links together all DOL Data Output Line as the LED anode of all optocouplers by isolating diode, and this isolating diode has played the selection effect to the different paths of low and high level electric current simultaneously.For example, in the time that transmitting terminal sends high level, in the present embodiment, be first then that diode arrives all optocoupler LED anodes through current-limiting resistance, if a certain road transmitting terminal output low level, electric current can flow out and flow into by the wire being all connected with described isolating diode 4 cathode terminals from isolating diode negative electrode so, pours into low level drive end after the LED of optocoupler.By such compound use, offset a public ground wire in road, any like this route can be concentric line.When use, remain and only have a road for comprising low level signal output, because the output encoder on each road arranges different, the each road of sending ending equipment circulation output coding, receiving end is circulated one by one and receive the check code on each road, thereby can identify the transmitting terminal numbering that every single line is corresponding.
Claims (4)
1. a cable checking circuit structure, comprises the checking signal sending ending equipment circuit and the checking signal receiving device circuit that connect by tested cable (3), and described tested cable (3) at least includes the 2 tested cables in road (7), it is characterized in that:
The circuit of crossing over checking signal transmitting terminal and checking signal receiving end only needs the tested cable (7) itself without common reference end, and the tested cable checking circuit in each road comprises the signal coupler (6) of current-limiting resistance (2) and the tested cable (7) that starts to be connected successively from checking signal sending ending equipment interface, isolating diode (4) and checking signal receiving end; The anodic bonding of the negative electrode of described isolating diode (4) and signal coupler input end (5), the anodic bonding of the negative electrode of signal coupler input end (5) and described isolating diode (4), it is consistent that described current-limiting resistance (2) is serially connected in the current-limiting resistance link position on arbitrary position in above-mentioned circuit front end or circuit and each road, and described isolating diode (4) cathode terminal of each tested cable line in road or the anode tap of signal coupler input end are connected by wire.
2. cable checking circuit structure according to claim 1, it is characterized in that: the output terminal of described signal coupler (6) is connected to and receives signal and process or indicating device, exports the checking signal that the checking signal transmitting terminal of this signal coupler place circuit is exported.
3. cable checking circuit structure according to claim 1 and 2, is characterized in that: described signal coupler (6) is that input end is the optocoupler of light emitting diode.
4. cable checking circuit structure according to claim 1, is characterized in that: each described tested cable (7) is connected to checking signal generator module (9) at described checking signal transmitting terminal through overdrive circuit (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420053375.XU CN203673014U (en) | 2014-01-27 | 2014-01-27 | Cable check circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420053375.XU CN203673014U (en) | 2014-01-27 | 2014-01-27 | Cable check circuit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203673014U true CN203673014U (en) | 2014-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420053375.XU Expired - Fee Related CN203673014U (en) | 2014-01-27 | 2014-01-27 | Cable check circuit structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203673014U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760457A (en) * | 2014-01-27 | 2014-04-30 | 中铁建电气化局集团南方工程有限公司 | Cable checking circuit structure and common-line-free cable checking method |
-
2014
- 2014-01-27 CN CN201420053375.XU patent/CN203673014U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760457A (en) * | 2014-01-27 | 2014-04-30 | 中铁建电气化局集团南方工程有限公司 | Cable checking circuit structure and common-line-free cable checking method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140625 Termination date: 20210127 |