CN110007185A - A kind of detection circuit and method for single-phase zero curve and firewire and ground wire - Google Patents
A kind of detection circuit and method for single-phase zero curve and firewire and ground wire Download PDFInfo
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- CN110007185A CN110007185A CN201910313298.4A CN201910313298A CN110007185A CN 110007185 A CN110007185 A CN 110007185A CN 201910313298 A CN201910313298 A CN 201910313298A CN 110007185 A CN110007185 A CN 110007185A
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
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Abstract
A kind of detection circuit and method for single-phase zero curve and firewire and ground wire, comprising: single phase poaer supply line 100, including zero curve N, firewire L and ground wire E；It further include detection unit 200 in the detection circuit, wherein including three connectors 1,2,3；Connector 1 is connected with resistance R1, and connector 2 is connected with resistance R3, and R1 is connected to one end of diode D1, and the other end of D1 is connected to light emitting diode D3；Connector 2 is connected to R3, and the other end of R3 is connected with diode D2；Diode D2 is also connected to one end of light emitting diode D3 and is connected to the negative terminal of D1；That is D1 is connected with the negative terminal of D2；Further light emitting diode D3 is connected to resistance R4, and is connected to ground wire by R4；Connector 3 is connected with resistance R5, and the anode of diode D6 is connected to by resistance R5, and the cathode of the diode D6 is connected with current-limiting resistance R6, is connected with light emitting diode D5 by the R6, then be connected to ground wire EE by light emitting diode D5.
Description
Technical field
The invention belongs to circuit fields more particularly to a kind of for single-phase firewire, zero curve, the detection circuit of ground wire and side
Method.
Background technique
In daily life, household electrical appliance will be usually connected on 220V single phase poaer supply, and the socket being arranged on the wall is most
It is single-phase three-wire socket, color assignment are as follows: firewire (being also phase line)-L (red or yellow), zero curve-N (blue or black), ground
Line-E (yellow green).But it cannot often be distinguished by color in the engineerings link such as house ornamentation, actual measurement is needed to determine.And in reality
In scene, when sometimes appearing in finishing, sometimes there is certain risk in firewire and the reversed situation of zero curve.Therefore,
Especially in the case where manual wiring, it is easy to cause electric shock.In addition, since the current potential of zero curve and ground wire is all close to 0V, it can not
It detected with voltage test pencil, wrong phenomenon often occur.And at present on the market single-phase three-hole socket detection can not judge it is this
Situation.It is proposed by the present invention for single-phase Live line Zero line in order to determine firewire and zero curve and zero curve and ground wire
Detection circuit and method can solve this problem.
Summary of the invention
The purpose of the present invention is being directed to the above-mentioned problems in the prior art, provide a kind of for single-phase Live line Zero line
Detection circuit and method.
The technical scheme adopted by the invention is that: a kind of detection circuit and side for single-phase zero curve and firewire and ground wire
Method.The detection circuit includes: single phase poaer supply line 100, including zero curve N, firewire L and ground wire E；In the detection circuit also
Including detection unit 200, wherein including three connectors 1,2,3；Connector 1 is connected with resistance R1, and connector 2 is connected with resistance R3, R1
It is connected to one end of diode D1, the other end of D1 is connected to light emitting diode D3；Connector 2 is connected to R3, and the other end of R3 connects
It is connected to diode D2；Diode D2 is also connected to one end of light emitting diode D3 and is connected to the negative terminal of D1；That is D1's and D2
Negative terminal is connected；Further light emitting diode D3 is connected to resistance R4, and is connected to ground wire by R4；The R4 is used for current limliting,
Prevent electric current is excessive from burning light emitting diode；Connector 3 is connected with resistance R5, and the anode of diode D6 is connected to by resistance R5,
The cathode of the diode D6 is connected with current-limiting resistance R6, is connected with light emitting diode D5 by the R6, then pass through luminous two
Pole pipe D5 is connected to ground wire EE.
A kind zero curve and firewire detection method, comprising: connector 1, connector 2 are connected to the left side two in power supply line 100
A connector, then observes light emitting diode.Assuming that left-hand joint sequence is that connector 1 connects is ground wire E, what connector 2 connected is
Zero curve N, then, due to voltage difference very little between zero curve and ground wire, and zero curve N is to the voltage difference between ground wire EE also very little,
Ground wire E is to the same very little of voltage difference between ground wire EE, at this point, light emitting diode D3 is to go out；Further, connector 3 is connected to
The firewire L of the rightmost side of power supply line 100, due to there is the voltage difference of 220V between firewire L and ground wire EE, by diode
D6 rectification, so that light emitting diode D5 can shine.Then judging result, which is that connector 1,2,3 is sequentially connected, is: ground wire E,
Zero curve N, firewire L.
Further, it is connected with connector A and connector B between resistance R1 and diode D1, is connected respectively to the dynamic inspection of elementary errors
Slowdown monitoring circuit, since the voltage of zero curve N is usually more slightly larger than the voltage of ground wire E, by judging the pressure difference between A point B, energy
Judging A and B, which is zero curve, which is ground wire.Shown differential detection circuit amplifies the voltage between A point and B point, so
After be connected to voltage comparison unit, if A point is greater than B point voltage, by comparator after amplification, export high level；If A point
Less than B point voltage, then by comparator after amplifying, low level is exported；Shown high level or low level can be by connecting a LED
Indicator light is shown.
Compared with prior art, the beneficial effect comprise that:
The most of intelligent measurement firewires of the prior art and zero curve whether reversal connection, but cannot detect which specific root is zero curve
Which root is firewire, and can not detect differentiation ground wire and zero curve, the present invention can judge single-phase electricity by the operation of several steps
Zero curve, firewire and ground wire in the line of source, it is simple to operate quick.
Detailed description of the invention
Fig. 1 is zero curve of the invention and firewire detection circuit.
Fig. 2 is another situation schematic diagram of the embodiment of the present invention.
Fig. 3 is the circuit for distinguishing zero curve and ground wire.
Fig. 4 is micro- differential amplifier circuit.
Fig. 5 is the present invention and remote monitoring platform connection schematic diagram.
Specific embodiment
Clear, complete description is carried out to technical solution of the present invention with reference to the accompanying drawing, it is clear that described embodiment
It is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The every other embodiment that member is obtained without making creative work, belongs to protection scope of the present invention.
A kind of zero curve provided in this embodiment and firewire detection circuit include: single phase poaer supply line 100, including zero curve N,
Firewire L and ground wire E；It further include detection unit 200 in the detection circuit, wherein including three connectors 1,2,3；Connector 1 connects
There is resistance R1, connector 2 is connected with resistance R3, and R1 is connected to one end of diode D1, and the other end of D1 is connected to light emitting diode
D3；Connector 2 is connected to R3, and the other end of R3 is connected with diode D2；Diode D2 is also connected to one end of light emitting diode D3
And it is connected to the negative terminal of D1；That is D1 is connected with the negative terminal of D2；Further light emitting diode D3 is connected to resistance R4, and passes through
R4 is connected to ground wire；The R4 is used for current limliting, prevents electric current is excessive from burning light emitting diode；Connector 3 is connected with resistance R5, passes through
Resistance R5 is connected to the anode of diode D6, and the cathode of the diode D6 is connected with current-limiting resistance R6, by the R6 connection
There is light emitting diode D5, then ground wire EE is connected to by light emitting diode D5.
In specific detection, connector 1,2,3 is connected respectively to single phase poaer supply line, single phase poaer supply line includes zero curve N, firewire
L and ground wire E, before unmeasured, not knowing every is zero curve N, firewire L or ground wire or ground wire E.It is according to the present invention
Embodiment, specific measurement process are as follows:
Firstly, connector 1, connector 2 are connected to two, the left side connector in power supply line 100 as shown in figure 1, then observation shines
Diode.Assuming that the sequence of left-hand joint just as shown in figure 1, that connector 1 connects is ground wire E, and that connector 2 connects is zero curve N,
Then, due to voltage difference very little between zero curve and ground wire, and zero curve N is to the voltage difference between ground wire EE also very little, and E pairs of ground wire
The same very little of voltage difference between ground wire EE, at this point, light emitting diode D3 is to go out；Further, connector 3 is connected to power supply line
The firewire L of 100 rightmost side, due to there is the voltage difference of 220V between firewire L and ground wire EE, it is rectified by diode D6,
So that light emitting diode D5 can shine.
As it can be seen that three lines in the power supply line 100 that connector lug is consecutively connected to are ground wire E respectively.Zero curve N, firewire L
In the case where, light emitting diode D3 is to go out；Light emitting diode D5 be it is bright, so that judging that connector 3 is connect is firewire L, connector 1
That connect respectively may be zero curve N and ground wire E one of both with 2.
One of embodiment according to the present invention, in another case, as illustrated in fig. 2, it is assumed that left-hand joint is just as in Fig. 2
Sequence, that connector 1 connects is ground wire E, and that connector 2 connects is firewire L；Ground wire E to the voltage difference very little between ground wire EE,
But due to there is the voltage difference of 220V between firewire L and ground wire EE, electric current passes through resistance R3, diode D2, to luminous two
Pole pipe D3, so that light emitting diode D3 is bright；In addition, due to voltage difference very little between zero curve N and ground wire EE, by two
The electric current very little of pole pipe D6 and light emitting diode D5, therefore, light emitting diode D5 are to go out.
At this point it is possible to judge, what at least one in connector 1 and connector 2 connected is firewire.It may then pass through and utilize figure
Method shown in 1 further judges firewire.
As it can be seen that three lines in the power supply line 100 that connector lug is consecutively connected to are ground wire E respectively.Zero curve N, firewire L
In the case where, light emitting diode D3 is to go out；Light emitting diode D5 be it is bright, so that judging that connector 3 is connect is firewire L, connector 1
That connect respectively may be zero curve N and ground wire E one of both with 2.
Further in order to distinguish ground wire and zero curve, detection circuit is as shown in Figure 3: connecting between resistance R1 and diode D1
It is connected to connector A and connector B, elementary errors shown in Fig. 4 is connected respectively to and moves detection circuit, since the voltage of zero curve N is usually than ground wire E
Voltage it is slightly larger, by judging the pressure difference between A point B, capable of judging A and B, which is zero curve, which is ground wire.Institute
Show that differential detection circuit amplifies the voltage between A point and B point, be then attached to voltage comparison unit, if A point is big
In B point voltage, then by comparator after amplifying, high level is exported；If A point is less than B point voltage, by comparing after amplification
Device exports low level；Shown high level or low level can be shown by connecting a LED light.
Further, in order to remote monitoring system state, the present invention still further comprises switch shape as shown in Figure 5
State measuring unit and remote monitoring platform, switch state measuring unit include optocoupler combination switch D8 and optocoupler combination switch D9, optocoupler
Combination switch D8 is coupled to the light emitting diode D3 in Fig. 3, when and can with light emitting diode D3 on-off；Similar, light
Coupled switch D9 is coupled to the light emitting diode D5 in Fig. 3, when and can with light emitting diode D5 on-off；The two-way
Optocoupler combination switch D8, D9 are connected respectively to processing unit, then are handled by processing unit, after packing, transmit data to remote
Journey transmission unit；Wired or wireless mode can be used in the remote transmission unit, by signal remote transmission to long-range monitoring
Platform；So as to remotely realize detection and monitoring.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of zero curve and firewire, line detection circuit characterized by comprising
Single phase poaer supply line 100, including zero curve N, firewire L and ground wire E；
It further include detection unit 200 in the detection circuit, wherein including three connectors 1,2,3；
Connector 1 is connected with resistance R1, and connector 2 is connected with resistance R3, and R1 is connected to one end of diode D1, the other end connection of D1
To light emitting diode D3；
Connector 2 is connected to R3, and the other end of R3 is connected with diode D2；
Diode D2 is also connected to one end of light emitting diode D3 and is connected to the negative terminal of D1；That is D1 is connected with the negative terminal of D2；
Light emitting diode D3 is connected to resistance R4, and is connected to ground wire by R4；The R4 is used for current limliting, prevents electric current is excessive from burning hair
Optical diode；Connector 3 is connected with resistance R5, and the anode of diode D6, the cathode of the diode D6 are connected to by resistance R5
It is connected with current-limiting resistance R6, is connected with light emitting diode D5 by the R6, then ground wire EE is connected to by light emitting diode D5；
It is connected with connector A and connector B between resistance R1 and diode D1, is connected respectively to elementary errors and moves detection circuit, Yi Ji electricity
Press comparator；And it is connected to low and high level indicating circuit.
2. zero curve according to claim 1 and firewire, line detection circuit, it is characterised in that: further include that switch state is surveyed
It measures unit and remote monitoring platform, the switch state measuring unit includes optocoupler combination switch D8 and optocoupler combination switch D9, optocoupler
Combination switch D8 is coupled to light emitting diode D3, when and can with light emitting diode D3 on-off；Optocoupler combination switch D9 coupling
To light emitting diode D5, when and can with light emitting diode D5 on-off；Described two-way optocoupler combination switch D8, D9 connect respectively
It is connected to processing unit, then is handled by processing unit, after packing, transmits data to remote transmission unit；The long-range biography
Wired or wireless mode can be used in defeated unit, by signal remote transmission to remote monitoring platform；So as to remotely realize
Detection and monitoring.
3. a kind of for detecting zero curve, firewire and the method for ground wire, using detection circuit described in claim 1, feature exists
In two, the left side connector for including the following steps: connector 1, connector 2 to be connected in power supply line 100, then observe light-emitting diodes
Pipe；Assuming that left-hand joint sequence is that connector 1 connects is ground wire E, that connector 2 connects is zero curve N, then due to zero curve and ground wire it
Between voltage difference very little, and zero curve N, to the voltage difference between ground wire EE also very little, ground wire E is to the voltage difference between ground wire EE
Same very little, at this point, light emitting diode D3 is to go out；
Connector 3 is connected to the firewire L of the rightmost side of power supply line 100, due to there is the voltage of 220V between firewire L and ground wire EE
Difference is rectified by diode D6, so that light emitting diode D5 can shine；Then judging result is that connector 1,2,3 successively connects
It connects: ground wire E, zero curve N, firewire L.
4. the method according to claim 2 for detecting zero curve, firewire and ground wire, it is characterised in that:
It is connected with connector A and connector B between resistance R1 and diode D1, is connected respectively to elementary errors and moves detection circuit, due to zero
The voltage of line N is usually more slightly larger than the voltage of ground wire E, by judging the pressure difference between A point B, can judge A and B which
It is zero curve, which is ground wire；The differential detection circuit amplifies the voltage between A point and B point, is then attached to voltage
Comparing unit, by comparator after amplification, exports high level if A point is greater than B point voltage；If A point is less than B point voltage,
By comparator after then amplifying, low level is exported；Shown high level or low level can be shown by connecting a LED light
Show.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910313298.4A CN110007185B (en) | 2019-04-18 | 2019-04-18 | Detection circuit and method for single-phase zero line, live line and ground line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910313298.4A CN110007185B (en) | 2019-04-18 | 2019-04-18 | Detection circuit and method for single-phase zero line, live line and ground line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110007185A true CN110007185A (en) | 2019-07-12 |
| CN110007185B CN110007185B (en) | 2020-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910313298.4A Active CN110007185B (en) | 2019-04-18 | 2019-04-18 | Detection circuit and method for single-phase zero line, live line and ground line |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021258731A1 (en) * | 2020-06-24 | 2021-12-30 | 优利德科技(中国)股份有限公司 | Ground wire and neutral line abnormity detection method and device, |
| CN114217245A (en) * | 2021-12-23 | 2022-03-22 | 广东电网有限责任公司江门供电局 | System for quickly checking user-to-user interaction of newly-built wiring |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN114217245A (en) * | 2021-12-23 | 2022-03-22 | 广东电网有限责任公司江门供电局 | System for quickly checking user-to-user interaction of newly-built wiring |
| CN114217245B (en) * | 2021-12-23 | 2023-08-04 | 广东电网有限责任公司江门供电局 | System for checking household serial number by uniformly building new assembly line |
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| Publication number | Publication date |
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| CN110007185B (en) | 2020-01-14 |
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