CN1776440A - Wiring identifying device and method - Google Patents
Wiring identifying device and method Download PDFInfo
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- CN1776440A CN1776440A CN 200510130487 CN200510130487A CN1776440A CN 1776440 A CN1776440 A CN 1776440A CN 200510130487 CN200510130487 CN 200510130487 CN 200510130487 A CN200510130487 A CN 200510130487A CN 1776440 A CN1776440 A CN 1776440A
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Abstract
The discriminating device includes following parts: signaling device includes multiple signal output ends to output impulse signals possessing different characteristic elements, and each signal output end is connected to one end of wiring connection in multiple wires; receiving device of having one or multiple input ends for receiving input signal, and demodulating the input signal when an input end is connected to another end of one of multiple wires, the receiving device picks up the characteristic element from signals received at input ends. The invention can detect wiring correctness for each type of metering device without energization. The invention also displays the tested result. Features are: cabinet, lightweight easy carrying, and battery power supply.
Description
Technical field
The present invention relates to a kind of Wiring identifying device and method, particularly solve the apparatus and method of differentiating the lead-in wire definition in the measuring apparatus installation process such as electric energy meter.
Background technology
In engineering, often have a lot of line colligations together, be hard to tell the definition of the end of a thread.Particularly with the three-phase electric energy meter of CT.Fig. 1 is the synoptic diagram of distribution substation mutual inductor and connection box of electric energy meter.Wherein, label 1 expression wiring source end, label 2 expression connection table ends, AI+, AU, AI-, BI+, BU, BI-, CI+, CU and CI-are respectively A phase current inlet wire, A phase voltage line, the outlet of A phase current, B phase current inlet wire, B phase voltage line, the outlet of B phase current, C phase current inlet wire, C phase voltage line and the outlet of C phase current.CT is a mutual inductor.When wiring, because connection box of electric energy meter is finished under power down mode, in case lead wrong wherein, energising back reconfiguration is very difficult and dangerous.
The apparatus and method of checking wiring at present are to use avometer resistance measurement shelves or break-make squealer to judge, the method inspection of easy avometer measuring resistance, not only inconvenient on the implementation, also can cause erroneous judgement because direct current resistances such as mutual inductor wherein are very little.These methods are not only judged very inconvenient, but also erroneous judgement easily, False Rate was very high when string had inductance when having the lead short circuit or between lead especially.
Summary of the invention
The purpose of this invention is to provide a kind of easy to use, the apparatus and method that can accurately judge lead-in wire definition.
Even further purpose of the present invention provides lead-in wire also can be determined the short circuit wire size by short circuit apparatus and method.
According to first aspect, the invention provides a kind of Wiring identifying device that is used to differentiate a plurality of wiring, described Wiring identifying device comprises: transmitting device, it comprises a plurality of signal output parts, the pulse signal of output with different characteristic key element respectively, each described signal output part link to each other with a end of a wiring in described a plurality of wiring respectively; Receiving device has one or more input ends, receiving inputted signal, and input signal handled; When a described input end was connected to the other end of one of described a plurality of wiring, receiving device extracted described characteristic element from the signal that receives at this input end, differentiate this wiring thus.
Transmitting device can be the square wave of different frequency at the characteristic element in the different characteristic key element signal of having of each output terminal output, can be the square wave of out of phase, also can be the square wave that sends varying number in one-period continuously.
In first aspect, preferably, described transmitting device comprises reference frequency unit and first processor unit, and described first processor unit produces described pulse signal with different characteristic key element according to the reference frequency signal from the reference frequency unit; Described receiving device comprises the analog to digital converter and second processor unit, and described analog to digital converter is sampled as digital signal with input signal, and described second processor unit extracts the characteristic element in the digital signal.
Preferably, described characteristic element can be meant the frequency difference of pulse signal, can be the phase place difference of pulse signal, can be the pulse number difference in a repetition period.
Preferably, at least one wiring in described a plurality of wiring comprises inductive load.Further preferably, described inductive load is a mutual inductor.
Described lead can be the connection lead between mutual inductor and electric energy meter.
According to second aspect, a kind of wiring method of discrimination that is used to differentiate a plurality of wiring is provided, described method comprises: the end to each wiring of described a plurality of wiring sends the pulse signal that has the different characteristic key element to constitute; Be connected to the other end received signal of one of described a plurality of wiring, and therefrom extracting described characteristic element, differentiating this wiring thus.
In second aspect, preferably include based on the level superposition principle, judge whether the one or more short circuits in a plurality of wiring.
Described differentiation result can show comprising on the display of liquid crystal indicator.
Adopt apparatus and method of the present invention can realize to all kinds of (single-phase, phase three-wire three, three-phase and four-lines; The band mutual inductor) measuring apparatus correctness to its wiring under cold situation is detected; Can detect the various wiring errors that measuring apparatus may occur, as: mutual hybrid junction etc. between current transformer error-polarity connection, short circuit, disconnecting and A, B, the C three-phase; Can show the mode of testing result with straightforward; The device small volume and less weight, easy to carry and use, use powered battery, so that use at the scene of construction.
Description of drawings
The present invention will be described in more detail below with reference to accompanying drawings, wherein:
Fig. 1 is the synoptic diagram of distribution substation and connection box of electric energy meter;
Fig. 2 is the composition frame chart of Wiring identifying device according to an embodiment of the invention;
Fig. 3 is the functional block diagram of transmitting device shown in Figure 2;
Fig. 4 is the functional block diagram of receiving device shown in Figure 2;
Fig. 5 is the synoptic diagram of the waveform of transmitting end generation;
Fig. 6 is under the situation of No. 3 lines, No. 5 lines and No. 8 line short circuits, the synoptic diagram of the signal waveform of the end of collecting mail; And
Fig. 7 is when mutual inductor is crossed in wiring, and crossing mutual inductor with No. 2 lines, No. 6 lines is example, the synoptic diagram of the signal waveform of the end of collecting mail.
Embodiment
Hereinafter, embodiments of the invention are specifically described to judge that the wiring between distribution substation and the electric energy meter is an example.
One, the composition of Wiring identifying device
Fig. 2 is the composition frame chart of Wiring identifying device according to an embodiment of the invention.As shown in Figure 2, Wiring identifying device is made up of two unit, is respectively transmitting device and receiving device.Signal wire among the figure is the wire harness of detected device.The output terminal of transmitting device is connected on the signal wire 1-N same end separately by for example 1-N wire clamp, and the input end of the other end of a signal wire and receiving device links to each other among the signal wire 1-N.Here, N can be the arbitrary integer greater than 1.
Fig. 3 is the functional block diagram of transmitting device shown in Figure 2.Transmitting device comprises a reference frequency generating unit and the single machine unit of posting a letter.The reference frequency signal that the single machine unit of posting a letter produces according to the reference frequency generating unit produces identical, the different waveform of interim pulse number weekly of N cycle respectively on N p-wire for example.The signal that is produced is held to collecting mail by signal wire transmits, for the usefulness of collection of letters single machine unit judgement.
Fig. 4 is the functional block diagram of receiving device shown in Figure 2.This receiving device comprises A/D converter, collection of letters single machine unit and liquid crystal indicator.From the signal of transmitting device by in the signal wire input a/d converter among the signal wire 1-N.A/D converter carries out analog to digital conversion to input signal, makes level value become digital quantity.Digital signal after the conversion is sent into collection of letters single machine unit and is judged wire size, at last with liquor charging crystal device demonstration as a result.In addition, judge a plurality of signal wires if desired simultaneously, can adopt a plurality of A/D converters that a plurality of input signals from a plurality of signal wires are carried out analog to digital conversion, handle by collection of letters single machine unit then.
Two, the course of work of Wiring identifying device
Wiring identifying device of the present invention is applicable to and detects the wire harness that two ends have certain distance to band together.The three-phase electricity streamline need pass through mutual inductor when especially electric energy meter was installed, and banded together with pressure-wire, and which root line the very bad judgement of table end is actually, uses traditional amount resistive method to cause erroneous judgement again easily.Which root line uses Wiring identifying device of the present invention clearly to judge is, clearly indication is also arranged when short circuit is arranged.
With detected device is that the situation of three-phase current table is an example, this moment signal wire to count N be 9.During measurement, 9 test clamps of transmitting end are clipped in three-phase mutual inductor primary side and secondary side two ends (the electric current line of corresponding electric energy meter advances/go out end, pressure-wire respectively) respectively, and common ground is clipped on the zero line, opens the transmitting end power supply.The end of collecting mail is clipped in common ground on the zero line, and signal wire is clipped on three-phase voltage to be detected, electric current line any one, opens the end power supply of collecting mail.To demonstrate measurement result on the liquid crystal display.Can or give sound prompting when showing separately.Step above repeating can test out 9 lines one by one.If online intrafascicular owing to insulation course damages or other reason causes some line short circuit, this device also can be measured and be shown, and scents a hidden danger early in time to be handled.
Three, the principle of work of Wiring identifying device
Apparatus of the present invention mainly utilize the superposition principle of level signal to carry out work.Fig. 5 is the synoptic diagram of the waveform that transmitting end produces under the situation of three-phase current table.As shown in Figure 5, there is the cycle identical respectively on nine test clamps of transmitting end, the different signal of phase pulse number weekly, the situation of judgement has following three kinds:
1, do not have under the situation of short circuit, what receive at the end of collecting mail is several pulses of same level height, detects respectively that interim weekly which root line has what pulses to judge be.
2, have that level will superpose under the situation of short circuit, present level such as 1/2VDD, 3/5VDD, can convert digital quantity to by AD converter and judge.For example, No. 3 lines, No. 5 lines and No. 8 line short circuits, signal will be state as shown in Figure 6.This signal can identify three stepped level by AD converter.Counted number of pulses when the identification level has saltus step in the software of single-chip microcomputer, which three line short circuit can judge has been, and then reaches a conclusion and the brilliant demonstration of liquor charging.
When 3, two lines were crossed mutual inductor (or other inductive load), crossing mutual inductor with No. 2 lines, No. 6 lines was example, and signal as shown in Figure 7.
Because the influence of mutual inductor, the 3rd pulse of No. 2 lines begins to move on the baseline, and No. 6 line moves down since the 3rd pulse baseline.The amplitude of moving on the baseline is not very big, and software processes once gets final product, and the shifting signal puzzlement is just bigger under the baseline.Because the AD converter benchmark low level in the single-chip microcomputer is 0, the signal that baseline moves down is by after the AD converter, and peak value descends, and too much will form pseudo-saltus step in case descend, and causes the software erroneous judgement.For example top No. 6 line signals are judged into the line short circuit easily 2, No. 6.The particular problem concrete analysis by a large amount of tests and theoretical analysis, is sought suitable sorting technique and separation among the present invention, judges wire size, and last liquor charging is brilliant to be shown.
Four, the hardware of device is formed
The transmitting end single-chip microcomputer of apparatus of the present invention can adopt for example ST6230 single-chip microcomputer of ST Microelectronics, and the end single-chip microcomputer of collecting mail can adopt for example PIC16F873A single-chip microcomputer.But their all 3V power supplies, low in energy consumption, anti-interference is good, is highly suitable for this product.
In another embodiment, the transmitting device generation has the pulse signal of different characteristic key element and signal is applied on the end of each wiring.Receiving device has memory storage, is used to store described different characteristic element.The input end of receiving device is connected to the other end of a wiring to be measured.When the signal that receives from wiring to be measured, collection of letters single-chip microcomputer is from wherein extracting characteristic element, and the characteristic element that extracts and the characteristic element stored are compared, judge the sequence number of wiring thus, and judge between wiring whether short circuit based on the level superposition principle.It may be noted that, characteristic element described here can be meant number, arrangement and the impulse level of each pulse in the pulse signal, as Fig. 5 signal, can also be other various types of waveform patterns, as long as in deterministic process, can fully distinguish different wire harness.
It may be noted that those skilled in the relevant art are easy to application form of the present invention is made the application of various combinations.
For example, the present invention is that example is described with the mutual inductor, but should be not limited thereto, applicable to other inductive load except that mutual inductor and the situation that do not have inductive load.
In addition, single-chip microcomputer can be various types of processors also, such as microprocessor.
In addition, also can adopt display device other perceptive mode in addition,, will differentiate the result and inform the user such as loudspeaker.
Such variation can not be considered to depart from scope of the present invention, and all so tangible changes concerning the person skilled in the art all are confirmed as being included in the scope of following claim.
Claims (17)
1. Wiring identifying device that is used to differentiate a plurality of wiring, described Wiring identifying device comprises: transmitting device, it comprises a plurality of signal output parts, the pulse signal of output with different characteristic key element respectively, each described signal output part link to each other with a end of a wiring in described a plurality of wiring respectively; Receiving device has one or more input ends, receiving inputted signal, and input signal handled; When a described input end was connected to the other end of one of described a plurality of wiring, receiving device extracted described characteristic element from the signal that receives at this input end, differentiate this wiring thus.
2. Wiring identifying device as claimed in claim 1, it is characterized in that described transmitting device comprises reference frequency unit and first processor unit, described first processor unit produces described pulse signal with different characteristic key element according to the reference frequency signal from the reference frequency unit; Described receiving device comprises the analog to digital converter and second processor unit, and described analog to digital converter is sampled as digital level with input signal, and described second processor unit extracts the characteristic element in the digital level.
3. Wiring identifying device as claimed in claim 1 is characterized in that described characteristic element is that cycle of pulse signal is identical, weekly phase pulse number difference.
4. Wiring identifying device as claimed in claim 1 is characterized in that described receiving device based on the level superposition principle, judges whether the one or more short circuits in a plurality of wiring.
5. Wiring identifying device as claimed in claim 1 is characterized in that at least one wiring in described a plurality of wiring comprises inductive load.
6. Wiring identifying device as claimed in claim 5 is characterized in that described inductive load is a mutual inductor.
7. Wiring identifying device as claimed in claim 6 is characterized in that described wiring is the wiring between mutual inductor and the electric energy meter.
8. Wiring identifying device as claimed in claim 1 is characterized in that comprising display device, shows described differentiation result.
9. wiring method of discrimination that is used to differentiate a plurality of wiring, described method comprises: the end to each wiring of described a plurality of wiring sends the pulse signal that has the different characteristic key element to constitute; Be connected to the other end received signal of one of described a plurality of wiring, and therefrom extracting described characteristic element, differentiating this wiring thus.
10. wiring method of discrimination as claimed in claim 9 is characterized in that the described step of posting a letter comprises according to reference frequency signal, produces the described pulse signal that has the different characteristic key element to constitute.
11. wiring method of discrimination as claimed in claim 9 is characterized in that described the pulse signal of different characteristic key element is arranged is that the cycle is identical, weekly the different signal of phase pulse number.
12. wiring method of discrimination as claimed in claim 9 is characterized in that described receiving step comprises the signal sampling to receiving.
13. wiring method of discrimination as claimed in claim 9 is characterized in that comprising the difference according to characteristic element, judges whether the one or more short circuits in a plurality of wiring.
14. wiring method of discrimination as claimed in claim 9 is characterized in that at least one wiring in described a plurality of wiring comprises inductive load.
15. wiring method of discrimination as claimed in claim 14 is characterized in that described inductive load is a mutual inductor.
16. wiring method of discrimination as claimed in claim 15 is characterized in that described wiring is the wiring between mutual inductor and the electric energy meter.
17. wiring method of discrimination as claimed in claim 9 is characterized in that comprising the described differentiation result of demonstration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101304876A CN100501429C (en) | 2005-12-13 | 2005-12-13 | Wiring identifying device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101304876A CN100501429C (en) | 2005-12-13 | 2005-12-13 | Wiring identifying device and method |
Publications (2)
| Publication Number | Publication Date |
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| CN1776440A true CN1776440A (en) | 2006-05-24 |
| CN100501429C CN100501429C (en) | 2009-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005101304876A Expired - Fee Related CN100501429C (en) | 2005-12-13 | 2005-12-13 | Wiring identifying device and method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830326A (en) * | 2011-06-16 | 2012-12-19 | 北京市电力公司 | Method and system for wire checking of wireless metering secondary circuit |
| CN103180746A (en) * | 2010-11-10 | 2013-06-26 | Sma太阳能技术股份公司 | Method for verifying electrical connection between generator and inverter using handheld device |
| CN103529343A (en) * | 2013-03-27 | 2014-01-22 | Tcl集团股份有限公司 | Intelligent diagnosing method and system of electrical device |
| CN104316825A (en) * | 2014-11-19 | 2015-01-28 | 国家电网公司 | Low voltage user electric energy meter wiring checking method and system |
| CN107102289A (en) * | 2017-06-19 | 2017-08-29 | 云南电网有限责任公司曲靖供电局 | A kind of measurement loop wiring error determination methods and device |
| CN109085458A (en) * | 2018-07-03 | 2018-12-25 | 国网福建省电力有限公司漳州供电公司 | The power failure recognition methods of low-voltage cable route |
| CN109116177A (en) * | 2018-06-11 | 2019-01-01 | 格力电器（武汉）有限公司 | Method and device for detecting line sequence of connecting line and computer storage medium |
| CN109116136A (en) * | 2018-07-03 | 2019-01-01 | 国网福建省电力有限公司漳州供电公司 | The electrification recognition methods of low-voltage cable route |
| CN109358258A (en) * | 2018-09-14 | 2019-02-19 | 国网福建省电力有限公司 | Intelligent secondary circuit cable alignment device |
| CN111948579A (en) * | 2019-04-29 | 2020-11-17 | 深圳市优必选科技有限公司 | Detection method and detection system for terminal connecting wire |
| CN113777533A (en) * | 2021-08-31 | 2021-12-10 | 江门市第一职业高级中学 | Wiring test method and wiring test system |
| CN113791368A (en) * | 2021-09-10 | 2021-12-14 | 苏州浪潮智能科技有限公司 | Method and device for automatically checking misplugging of interconnection cables of server and GPU (graphics processing Unit) box |
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| US3986106A (en) * | 1975-03-31 | 1976-10-12 | Shuck Edward E | Portable set for automatic sequential test of multiple wire pairs |
| CN2069569U (en) * | 1990-05-25 | 1991-01-16 | 刘正兴 | Numeral speedy wire checking instrumest |
| JPH08289466A (en) * | 1995-04-17 | 1996-11-01 | Sanyo Electric Co Ltd | Erroneous wiring detector for power supply |
| US20050212530A1 (en) * | 2004-03-24 | 2005-09-29 | Hall David R | Method and Apparatus for Testing Electromagnetic Connectivity in a Drill String |
| CN100401079C (en) * | 2004-04-14 | 2008-07-09 | 山东大学 | Single phase earthing wire selection method for small earthing current system |
| CN2914101Y (en) * | 2005-12-13 | 2007-06-20 | 北京潞电电气设备厂 | Connection discriminating device |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103180746A (en) * | 2010-11-10 | 2013-06-26 | Sma太阳能技术股份公司 | Method for verifying electrical connection between generator and inverter using handheld device |
| CN102830326A (en) * | 2011-06-16 | 2012-12-19 | 北京市电力公司 | Method and system for wire checking of wireless metering secondary circuit |
| CN102830326B (en) * | 2011-06-16 | 2015-04-08 | 国家电网公司 | Method and system for wire checking of wireless metering secondary circuit |
| CN103529343A (en) * | 2013-03-27 | 2014-01-22 | Tcl集团股份有限公司 | Intelligent diagnosing method and system of electrical device |
| CN103529343B (en) * | 2013-03-27 | 2016-04-13 | Tcl集团股份有限公司 | A kind of intelligent diagnosing method of electric equipment and system |
| CN104316825A (en) * | 2014-11-19 | 2015-01-28 | 国家电网公司 | Low voltage user electric energy meter wiring checking method and system |
| CN107102289A (en) * | 2017-06-19 | 2017-08-29 | 云南电网有限责任公司曲靖供电局 | A kind of measurement loop wiring error determination methods and device |
| CN107102289B (en) * | 2017-06-19 | 2019-10-22 | 云南电网有限责任公司曲靖供电局 | A kind of measurement loop wiring error judgment method and device |
| CN109116177A (en) * | 2018-06-11 | 2019-01-01 | 格力电器（武汉）有限公司 | Method and device for detecting line sequence of connecting line and computer storage medium |
| CN109085458A (en) * | 2018-07-03 | 2018-12-25 | 国网福建省电力有限公司漳州供电公司 | The power failure recognition methods of low-voltage cable route |
| CN109116136A (en) * | 2018-07-03 | 2019-01-01 | 国网福建省电力有限公司漳州供电公司 | The electrification recognition methods of low-voltage cable route |
| CN109358258A (en) * | 2018-09-14 | 2019-02-19 | 国网福建省电力有限公司 | Intelligent secondary circuit cable alignment device |
| CN111948579A (en) * | 2019-04-29 | 2020-11-17 | 深圳市优必选科技有限公司 | Detection method and detection system for terminal connecting wire |
| CN113777533A (en) * | 2021-08-31 | 2021-12-10 | 江门市第一职业高级中学 | Wiring test method and wiring test system |
| CN113791368A (en) * | 2021-09-10 | 2021-12-14 | 苏州浪潮智能科技有限公司 | Method and device for automatically checking misplugging of interconnection cables of server and GPU (graphics processing Unit) box |
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| CN100501429C (en) | 2009-06-17 |
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