CN113447885A - Electric energy meter wrong wiring rapid detection circuit and device - Google Patents

Electric energy meter wrong wiring rapid detection circuit and device Download PDF

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Publication number
CN113447885A
CN113447885A CN202111000359.5A CN202111000359A CN113447885A CN 113447885 A CN113447885 A CN 113447885A CN 202111000359 A CN202111000359 A CN 202111000359A CN 113447885 A CN113447885 A CN 113447885A
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China
Prior art keywords
resistor
emitting diode
output end
probe
circuit
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CN202111000359.5A
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Chinese (zh)
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CN113447885B (en
Inventor
梁展博
庄希瑞
林思婷
谢敏思
何润得
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Zhanjiang Power Supply Bureau of Guangdong Power Grid Co Ltd
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Zhanjiang Power Supply Bureau of Guangdong Power Grid Co Ltd
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Priority to CN202111000359.5A priority Critical patent/CN113447885B/en
Publication of CN113447885A publication Critical patent/CN113447885A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R35/00Testing or calibrating of apparatus covered by the other groups of this subclass
    • G01R35/04Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/55Testing for incorrect line connections
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/66Testing of connections, e.g. of plugs or non-disconnectable joints
    • G01R31/68Testing of releasable connections, e.g. of terminals mounted on a printed circuit board

Abstract

The application discloses electric energy meter wrong wiring short-term test circuit and device, through live wire input probe, live wire output probe, four probes realization of zero line input probe and zero line output probe are docked the back with four terminals of electric energy meter, utilize the voltage comparator to carry out the potential difference measurement, and through the AND gate, the logical circuit of NOT gate judges whether the direction of current of the terminal of electric energy meter is correct according to the potential difference measuring result, judge promptly whether the wiring is correct, and utilize emitting diode to indicate the wiring condition, thereby need not external load, the wiring condition that has realized detecting the electric energy meter fast and conveniently promptly.

Description

Electric energy meter wrong wiring rapid detection circuit and device
Technical Field
The application relates to the technical field of electric energy meter detection, in particular to a circuit and a device for rapidly detecting wrong wiring of an electric energy meter.
Background
Because the metering element of the electric energy meter has directionality, the electric quantity can be accurately metered only if the electric energy meter is correctly wired. When the field line identification is not clear, the fault of wrong connection of the electric energy meter is easy to occur, and the wrong connection is the most common reason for metering errors. The wrong wiring of electric energy meter often can lead to the hourglass electric quantity, and then influences the line loss lean of power supply enterprise, causes the economic loss of power supply enterprise. Therefore, in order to ensure the correct wiring of the electric energy meter, the wiring condition is often required to be detected after the wiring is finished.
The traditional wiring detection only simply uses an electricity testing pen to test the live wire and the zero line, but the electricity testing pen only can test the live wire and the zero line, can not test the direction of current, and can not distinguish the incoming line and the outgoing line of the wiring of the electric energy meter. Or use the phase volt-ampere meter, but need to insert load and just can use the phase volt-ampere meter to measure current, but, can not produce load current immediately after the power transmission for user's dress table most of time, so, generally speaking, can not use the phase volt-ampere meter to test immediately after the electric energy meter of installation, and simultaneously, the test procedure that uses the phase volt-ampere meter is more loaded down with trivial details, leads to the wiring condition that can not detect the electric energy meter fast.
Disclosure of Invention
The application provides a circuit and a device for rapidly detecting wrong wiring of an electric energy meter, which are used for solving the technical problem that the wiring condition of the electric energy meter cannot be rapidly and conveniently detected in the prior art.
In view of this, a first aspect of the present application provides a circuit for rapidly detecting an incorrect wiring of an electric energy meter, including a front end detection circuit and a comparison and determination circuit, where the front end detection circuit includes a live wire probe module and a zero line probe module, and the comparison and determination circuit includes a first voltage comparator, a second voltage comparator, a third voltage comparator, a first and gate circuit, a second and gate circuit, a third and gate circuit, a fourth and gate circuit, a first not gate circuit, a second not gate circuit, a third not gate circuit, a first light emitting diode, a second light emitting diode, a third light emitting diode, a fourth light emitting diode, and a fifth light emitting diode;
the live wire probe module comprises a live wire input probe, a live wire output probe, a first resistor R1 and a second resistor R2, wherein the live wire input probe and the live wire output probe are respectively connected to the input end of the first voltage comparator in parallel through the first resistor R1 and the second resistor R2;
the zero line probe module comprises a zero line input probe, a zero line output probe, a fifth resistor R5 and a sixth resistor R6, wherein the zero line input probe and the line output probe are respectively connected in parallel to the input end of the second voltage comparator through the fifth resistor R5 and the sixth resistor R6;
the output end of the first resistor R1 and the output end of the second resistor R2 are connected and converged to form a first convergence point, the output end of the fifth resistor R5 and the output end of the sixth resistor R6 are connected and converged to form a second convergence point, the first convergence point and the second convergence point are connected, a fourth resistor R4 is arranged on a connecting line between the first convergence point and the second convergence point, and the resistance value of the fourth resistor R4 is larger than the sum of the resistance values of the first resistor R1, the second resistor R2, the fifth resistor R5 and the sixth resistor R6;
a live wire contact and a zero wire contact are sequentially arranged on a line between the fourth resistor R4 and the first convergence point, and the live wire contact is arranged close to the first convergence point relative to the zero wire contact;
the live wire contact and the zero wire contact are respectively connected to the input end of the third voltage comparator in parallel through a ninth resistor R9 and a tenth resistor R10;
the first output end of the first voltage comparator is connected with the input end of the first NOT gate circuit, the output end of the first NOT gate circuit and the first output end of the third voltage comparator are connected in parallel to the input end of the first AND gate circuit, the output end of the first AND gate circuit is connected with the input end of the first light emitting diode, and the output end of the first light emitting diode is grounded;
the second output end of the first voltage comparator and the second output end of the third voltage comparator are connected in parallel to the input end of the second and-gate circuit, the output end of the second and-gate circuit is connected with the input end of the second light-emitting diode, and the output end of the second light-emitting diode is grounded;
a third output end of the third voltage comparator is connected with an input end of the second not gate circuit, an output end of the second not gate circuit is connected with an input end of the third light emitting diode, and an output end of the third light emitting diode is grounded;
a first output end of the second voltage comparator and a fourth output end of the third voltage comparator are connected in parallel to an input end of the third and-gate circuit, an output end of the third and-gate circuit is connected with an input end of the fourth light-emitting diode, and an output end of the fourth light-emitting diode is grounded;
the second output end of the second voltage comparator is connected with the input end of the third not gate circuit, the output end of the third not gate circuit and the fifth output end of the third voltage comparator are connected in parallel to the input end of the fourth and gate circuit, the output end of the fourth and gate circuit is connected with the input end of the fifth light emitting diode, and the output end of the fifth light emitting diode is grounded.
Preferably, the distance between the live wire input probe and the live wire output probe is adjustable, and the distance between the zero line input probe and the zero line output probe is adjustable.
Preferably, an eleventh resistor R11 is connected between the output end of the first and circuit and the input end of the first light emitting diode, a twelfth resistor R12 is connected between the output end of the second and circuit and the input end of the second light emitting diode, a thirteenth resistor R13 is connected between the output end of the second not circuit and the input end of the third light emitting diode, a fourteenth resistor R14 is connected between the output end of the third and circuit and the input end of the fourth light emitting diode, and a fifteenth resistor R15 is connected between the output end of the fourth and circuit and the input end of the fifth light emitting diode.
Preferably, the fourth resistor R4 has a resistance of 4k Ω.
Preferably, the first resistor R1, the second resistor R2, the fifth resistor R5 and the sixth resistor R6 have the same resistance.
In a second aspect, the invention further provides a device for rapidly detecting the wrong wiring of the electric energy meter, the device is applied to the circuit for rapidly detecting the wrong wiring of the electric energy meter and comprises a shell and a handle, the handle is connected with the shell, the circuit for rapidly detecting the wrong wiring of the electric energy meter is arranged in the shell, four probes are arranged at the front end of the shell and are respectively connected with a live wire input probe, a live wire output probe, a zero line input probe and a zero line output probe, five lamp holes are further formed in the shell and are respectively arranged corresponding to the first light emitting diode, the second light emitting diode, the third light emitting diode, the fourth light emitting diode and the fifth light emitting diode.
Preferably, the device further comprises an alarm module, wherein the alarm module is electrically connected with the electric energy meter wrong wiring quick detection circuit and used for sending an alarm reminding signal when the electric energy meter wrong wiring quick detection circuit detects that the tested electric energy meter has a wiring error.
According to the technical scheme, the invention has the following advantages:
the invention realizes the butt joint with four binding posts of the electric energy meter through four probes of the live wire input probe, the live wire output probe, the zero line input probe and the zero line output probe, utilizes the voltage comparator to carry out potential difference measurement, judges whether the current direction of the binding posts of the electric energy meter is correct or not according to the potential difference measurement result through the logic circuits of the AND gate and the NOT gate, namely judges whether the wiring is correct or not, and utilizes the light-emitting diode to indicate the wiring condition, thereby realizing the rapid and convenient detection of the wiring condition of the electric energy meter without an external load.
Drawings
Fig. 1 is a schematic structural diagram of a circuit for rapidly detecting a faulty wiring of an electric energy meter according to an embodiment of the present application;
fig. 2 is a front-end detection circuit diagram of a circuit for rapidly detecting a faulty wiring of an electric energy meter according to an embodiment of the present disclosure;
fig. 3 is a comparison and determination circuit diagram of a circuit for rapidly detecting a faulty wiring of an electric energy meter according to an embodiment of the present application;
fig. 4 is a schematic wiring diagram of a single-phase electric energy meter provided in the embodiment of the present application;
fig. 5 is an equivalent circuit diagram of a front-end detection circuit of a fast detection circuit for wrong wiring of an electric energy meter provided in the embodiment of the present application, which is in butt joint with the electric energy meter;
fig. 6 is a structural diagram of a device for rapidly detecting a faulty wiring of an electric energy meter according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The traditional wiring detection only simply uses an electricity testing pen to test the live wire and the zero line, but the electricity testing pen only can test the live wire and the zero line, can not test the direction of current, and can not distinguish the incoming line and the outgoing line of the wiring of the electric energy meter. Or use the phase volt-ampere meter, but need to insert load and just can use the phase volt-ampere meter to measure current, but, can not produce load current immediately after the power transmission for user's dress table most of time, so, generally speaking, can not use the phase volt-ampere meter to test immediately after the electric energy meter of installation, and simultaneously, the test procedure that uses the phase volt-ampere meter is more loaded down with trivial details, leads to the wiring condition that can not detect the electric energy meter fast.
Therefore, the invention provides a circuit for rapidly detecting wrong wiring of an electric energy meter, and for easy understanding, please refer to fig. 1 to 3, fig. 1 is a schematic structural diagram of the circuit for rapidly detecting the wrong wiring of the electric energy meter, fig. 2 illustrates a front end detection circuit diagram in the circuit for rapidly detecting the wrong wiring of the electric energy meter provided by the invention, fig. 3 illustrates a comparison and discrimination circuit diagram in the circuit for rapidly detecting the wrong wiring of the electric energy meter provided by the invention, the circuit for rapidly detecting the wrong wiring of the electric energy meter provided by the invention comprises a front end detection circuit 100 and a comparison and discrimination circuit 200, the front end detection circuit 100 comprises a live wire probe module and a zero wire probe module, and the comparison and discrimination circuit 200 comprises a first voltage comparator 201, a second voltage comparator 202, a third voltage comparator 203, a first and gate circuit 221, a second and gate circuit 222, a third and gate circuit 223, A fourth and circuit 224, a first not circuit 211, a second not circuit 212, a third not circuit 213, a first light emitting diode LED1, a second light emitting diode LED2, a third light emitting diode LED3, a fourth light emitting diode LED4, and a fifth light emitting diode LED 5;
the live wire probe module comprises a live wire input probe, a live wire output probe, a first resistor R1 and a second resistor R2, wherein the live wire input probe and the live wire output probe are respectively connected in parallel to the input end of the first voltage comparator 201 through the first resistor R1 and the second resistor R2;
the zero line probe module comprises a zero line input probe, a zero line output probe, a fifth resistor R5 and a sixth resistor R6, wherein the zero line input probe and the line output probe are respectively connected in parallel to the input end of the second voltage comparator 202 through the fifth resistor R5 and the sixth resistor R6;
the output end of the first resistor R1 and the output end of the second resistor R2 are connected and converged to form a first convergence point, the output end of the fifth resistor R5 and the output end of the sixth resistor R6 are connected and converged to form a second convergence point, the first convergence point and the second convergence point are connected, a fourth resistor R4 is arranged on a connecting line between the first convergence point and the second convergence point, and the resistance value of the fourth resistor R4 is larger than the sum of the resistance values of the first resistor R1, the second resistor R2, the fifth resistor R5 and the sixth resistor R6;
it should be noted that, a fourth resistor R4 is arranged on a line between the live wire probe module and the neutral wire probe module of the circuit, the resistance of the fourth resistor R4 is greater than the sum of the resistances of the first resistor R1, the second resistor R2, the fifth resistor R5 and the sixth resistor R6, and the fourth resistor R4 is a load introduced inside the detection circuit, so that an external connection load is not required, and meanwhile, the resistance of the load is only greater than the sum of the resistances of the first resistor R1, the second resistor R2, the fifth resistor R5 and the sixth resistor R6, and a higher resistance is not required. In a general example, the resistance of the fourth resistor R4 is 500 Ω -4 k Ω, and the resistances of the first resistor R1, the second resistor R2, the fifth resistor R5 and the sixth resistor R6 are all equal to 100 Ω.
The fourth load resistor R4 with a large resistance value can enable the detection circuit to generate a smaller load current after the detection circuit is connected with the electric energy meter in a butt joint mode, so that the detection current direction can be detected, and the small current is beneficial to the safety of operation and the loss reduction in the detection process.
A live wire contact and a zero wire contact are sequentially arranged on a line between the fourth resistor R4 and the first convergence point, and the live wire contact is arranged close to the first convergence point relative to the zero wire contact;
the live wire contact and the zero wire contact are respectively connected in parallel to the input end of the third voltage comparator 203 through a ninth resistor R9 and a tenth resistor R10;
a first output end of the first voltage comparator 201 is connected with an input end of the first not-gate circuit 211, an output end of the first not-gate circuit 211 and a first output end of the third voltage comparator 203 are connected in parallel to an input end of the first and-gate circuit 221, an output end of the first and-gate circuit 221 is connected with an input end of the first light-emitting diode LED1, and an output end of the first light-emitting diode LED1 is grounded;
the second output end of the first voltage comparator 201 and the second output end of the third voltage comparator 203 are connected in parallel to the input end of the second and circuit 222, the output end of the second and circuit 222 is connected with the input end of the second light emitting diode LED2, and the output end of the second light emitting diode LED2 is grounded;
a third output end of the third voltage comparator 203 is connected with an input end of the second not-gate circuit 212, an output end of the second not-gate circuit 212 is connected with an input end of the third light-emitting diode LED3, and an output end of the third light-emitting diode LED3 is grounded;
the first output end of the second voltage comparator 202 and the fourth output end of the third voltage comparator 203 are connected in parallel to the input end of the third and circuit 223, the output end of the third and circuit 223 is connected with the input end of the fourth light emitting diode LED4, and the output end of the fourth light emitting diode LED4 is grounded;
the second output end of the second voltage comparator 202 is connected to the input end of the third not-gate circuit 213, the output end of the third not-gate circuit 213 and the fifth output end of the third voltage comparator 203 are connected in parallel to the input end of the fourth and-gate circuit 224, the output end of the fourth and-gate circuit 224 is connected to the input end of the fifth light-emitting diode LED5, and the output end of the fifth light-emitting diode LED5 is grounded.
The following is a description of the working principle of the electric energy meter wrong wiring rapid detection circuit provided by the invention.
As shown in fig. 4, fig. 4 is a correct wiring manner of the single-phase electric energy meter, wherein the correct wiring manner includes four wiring terminals 1, 2, 3, and 4, wherein the wiring terminal 1 is a live wire incoming wire, the wiring terminal 2 is a live wire outgoing wire, the wiring terminal 3-bit zero line incoming wire, and the wiring terminal 4 is a zero line outgoing wire.
As shown in fig. 2, when the electric energy meter wrong wiring fast detection circuit of the present invention is used, a live wire input probe, a live wire output probe, a zero line input probe, and a zero line output probe in the detection circuit are respectively and correspondingly butted with the four binding posts 1, 2, 3, and 4, after the butting, an equivalent circuit diagram of the front end detection circuit of the electric energy meter wrong wiring fast detection circuit and the electric energy meter is shown in fig. 5, wherein R7 is an equivalent resistance between the binding posts 1 and 2 (live wire incoming wire and live wire outgoing wire) and passing metering elements, R8 is an equivalent resistance between the binding posts 3 and 4 (zero line incoming wire and zero line outgoing wire) and passing metering elements, and R3 is an equivalent resistance between the live wire (including live wire incoming wire and live wire) and the zero line (including zero line incoming wire and zero line) in the detection circuit.
According to the equivalent circuit diagram of fig. 5, the detection circuit provided by the invention converts the current direction measurement between the live wire incoming wire and the live wire outgoing wire of the electric energy meter into the potential difference measurement of the U1 and U2 measurement points, converts the current direction measurement between the zero wire incoming wire and the zero wire outgoing wire into the potential difference measurement of the U3 and U4 measurement points, and converts the current direction measurement between the live wire and the zero wire into the potential difference measurement of the U5 and U6 measurement points. Therefore, the current direction between the incoming line and the outgoing line of the live wire binding post of the electric energy meter can be judged by only measuring the potential difference between the U1 and the U2, the current direction between the incoming line and the outgoing line of the zero wire binding post of the electric energy meter can be judged by measuring the potential difference between the U4 and the U3, and the current direction between the live wire and the zero wire of the electric energy meter can be judged by measuring the potential difference between the U4 and the U3, and the current direction between the incoming line and the outgoing line of the zero wire binding post of the electric energy meter can be judged by measuring the potential difference between the U5 and the U6. And the measurement of the current direction of the electric energy meter is converted into the measurement of the potential difference, so that a detection circuit is simplified, an external load is not required, and the manufacturing process and the cost of an instrument are reduced.
The following is a description of the working process of the electric energy meter wrong wiring rapid detection circuit provided by the invention.
As shown in fig. 3, based on the above-mentioned working principle, after the rapid detection circuit for wrong wiring of the accessed electric energy meter is accessed to the single-phase electric energy meter, since the four terminals 1, 2, 3, 4 are respectively connected to the live wire input probe, the live wire output probe, the zero line input probe and the zero line output probe in the detection circuit correspondingly, after the connection, the first voltage comparator 201 is used for comparing the magnitudes of the potentials of the live wire input probe and the live wire output probe (i.e., the measurement points U1, U2), the second voltage comparator 202 is used for comparing the magnitudes of the potentials of the zero line input probe and the zero line output probe (i.e., the measurement points U3, U4), and the third voltage comparator 203 is used for comparing the magnitudes of the potentials of the live wire and the zero line (i.e., the measurement points U5, U6).
And a plurality of and circuits and a plurality of not circuits are connected to the output ends of the first voltage comparator 201, the second voltage comparator 202 and the third voltage comparator 203, so that the wiring condition of the electric energy meter is judged through a logic circuit structure according to the comparison result of the potential magnitude, and a plurality of light emitting diodes are arranged at the output ends of the and circuits and the not circuits to indicate the wiring condition.
Specifically, the following indication results can be obtained through the above working process;
1) when U5 is less than U6, the potential of the zero line terminal is higher than that of the live line terminal, which represents that the live line and the zero line of the electric energy meter are reversely connected, and at the moment, the third light-emitting diode LED3 (the color can be set as a red light) is lightened, and the third light-emitting diode LED3 is not lightened under other conditions;
2) when U1 is less than U2 and U5 is greater than U6, the incoming line and the outgoing line of the live wire binding post of the electric energy meter are reversely connected, at the moment, the first light-emitting diode LED1 is lightened (the color can be set as a yellow lamp), and the second light-emitting diode LED2 is extinguished (the color can be set as a green lamp);
3) when U1 is more than U2 and U5 is more than U6, the wiring of the live wire binding post of the electric energy meter is completely correct, at the moment, the second light-emitting diode LED2 is lightened, and the first light-emitting diode LED1 is extinguished and lightened;
4) when U4 is less than U3 and U5 is greater than U6, the incoming line and the outgoing line of the zero line terminal of the electric energy meter are reversed, the fifth light-emitting diode LED5 (the color can be set as a yellow light) is lightened, and the fourth light-emitting diode LED4 (the color can be set as a green light) is extinguished;
5) when U4 is greater than U3, and U5 is greater than U6, the wiring of the zero line terminal of the electric energy meter is completely correct, the fourth light-emitting diode LED4 is lightened, and the fifth light-emitting diode LED5 is extinguished.
From this, it can be concluded that, this embodiment realizes docking the back with four terminals of electric energy meter through four probes of live wire input probe, live wire output probe, zero line input probe and zero line output probe, utilize the voltage comparator to carry out the potential difference measurement, and judge whether the current direction of the terminal of electric energy meter is correct according to the potential difference measurement result through the logic circuit of AND gate, NOT gate, judge whether the wiring is correct promptly, and utilize emitting diode to indicate the wiring condition, thereby need not external load, realized promptly and conveniently detecting the wiring condition of electric energy meter.
Furthermore, the distance between the live wire input probe and the live wire output probe is adjustable, and the distance between the zero line input probe and the zero line output probe is adjustable.
It should be noted that, the distance between the live wire input probe and the live wire output probe and the distance between the zero line input probe and the zero line output probe are adjusted, so that the distance is more flexible, and the electric energy meter can be adapted to various models.
Further, an eleventh resistor R11 is connected between the output terminal of the first and circuit 221 and the input terminal of the first light emitting diode LED1, a twelfth resistor R12 is connected between the output terminal of the second and circuit 222 and the input terminal of the second light emitting diode LED2, a thirteenth resistor R13 is connected between the output terminal of the second not circuit 212 and the input terminal of the third light emitting diode LED3, a fourteenth resistor R14 is connected between the output terminal of the third and circuit 223 and the input terminal of the fourth light emitting diode LED4, and a fifteenth resistor R15 is connected between the output terminal of the fourth and circuit 224 and the input terminal of the fifth light emitting diode LED 5.
It should be noted that, by setting the resistor, the current flowing into the light emitting diode can be reduced, and the light emitting diode is prevented from being damaged.
The above is a detailed description of an embodiment of the circuit for quickly detecting a faulty wiring of an electric energy meter according to the present invention, and the following is a detailed description of an embodiment of an apparatus for quickly detecting a faulty wiring of an electric energy meter using the circuit for quickly detecting a faulty wiring of an electric energy meter.
For convenience of understanding, please refer to fig. 6, the device for rapidly detecting an incorrect wiring of an electric energy meter according to the present invention employs the above-mentioned circuit for rapidly detecting an incorrect wiring of an electric energy meter, and includes a housing 302 and a handle 301, the handle 301 is connected to the housing 302, the circuit for rapidly detecting an incorrect wiring of an electric energy meter is disposed in the housing 302, four probes 311, 312, 313, and 314 are disposed at a front end of the housing 302, the four probes 311, 312, 313, and 314 are respectively connected to a live wire input probe, a live wire output probe, a zero wire input probe, and a zero wire output probe, and five lamp holes 321 are further disposed on the housing 302, and the five lamp holes 321 are respectively disposed corresponding to a first light emitting diode, a second light emitting diode, a third light emitting diode, a fourth light emitting diode, and a fifth light emitting diode.
Furthermore, the system also comprises an alarm module which is electrically connected with the electric energy meter wrong wiring rapid detection circuit and used for sending out an alarm reminding signal when the electric energy meter wrong wiring rapid detection circuit detects that the tested electric energy meter has wiring errors.
It should be noted that the forms of the alarm reminding signal include voice, light, and text display on web page.
In addition, in order to adapt to the adjustable distance between the live wire input probe, the live wire output probe, the zero line input probe and the zero line output probe, the distance between the four probes in the device is also adjustable, so that the flexibility and the practicability are improved.
It should be noted that, because the circuit for rapidly detecting the wrong wiring of the electric energy meter in the embodiment is applied, after the circuit is butted with four binding posts of the electric energy meter by four probes of the live wire input probe, the live wire output probe, the zero line input probe and the zero line output probe, a voltage comparator is used for measuring potential difference, and a logic circuit of an and gate and a not gate is used for judging whether the current direction of the binding posts of the electric energy meter is correct according to the potential difference measurement result, that is, whether the wiring is correct is judged, and a light emitting diode is used for indicating the wiring condition, so that the wiring condition of the electric energy meter is rapidly and conveniently detected without an external load.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (7)

1. A circuit for rapidly detecting wrong wiring of an electric energy meter is characterized by comprising a front-end detection circuit and a comparison and judgment circuit, wherein the front-end detection circuit comprises a live wire probe module and a zero wire probe module, and the comparison and judgment circuit comprises a first voltage comparator, a second voltage comparator, a third voltage comparator, a first AND gate circuit, a second AND gate circuit, a third AND gate circuit, a fourth AND gate circuit, a first NOT gate circuit, a second NOT gate circuit, a third NOT gate circuit, a first light emitting diode, a second light emitting diode, a third light emitting diode, a fourth light emitting diode and a fifth light emitting diode;
the live wire probe module comprises a live wire input probe, a live wire output probe, a first resistor R1 and a second resistor R2, wherein the live wire input probe and the live wire output probe are respectively connected to the input end of the first voltage comparator in parallel through the first resistor R1 and the second resistor R2;
the zero line probe module comprises a zero line input probe, a zero line output probe, a fifth resistor R5 and a sixth resistor R6, wherein the zero line input probe and the line output probe are respectively connected in parallel to the input end of the second voltage comparator through the fifth resistor R5 and the sixth resistor R6;
the output end of the first resistor R1 and the output end of the second resistor R2 are connected and converged to form a first convergence point, the output end of the fifth resistor R5 and the output end of the sixth resistor R6 are connected and converged to form a second convergence point, the first convergence point and the second convergence point are connected, a fourth resistor R4 is arranged on a connecting line between the first convergence point and the second convergence point, and the resistance value of the fourth resistor R4 is larger than the sum of the resistance values of the first resistor R1, the second resistor R2, the fifth resistor R5 and the sixth resistor R6;
a live wire contact and a zero wire contact are sequentially arranged on a line between the fourth resistor R4 and the first convergence point, and the live wire contact is arranged close to the first convergence point relative to the zero wire contact;
the live wire contact and the zero wire contact are respectively connected to the input end of the third voltage comparator in parallel through a ninth resistor R9 and a tenth resistor R10;
the first output end of the first voltage comparator is connected with the input end of the first NOT gate circuit, the output end of the first NOT gate circuit and the first output end of the third voltage comparator are connected in parallel to the input end of the first AND gate circuit, the output end of the first AND gate circuit is connected with the input end of the first light emitting diode, and the output end of the first light emitting diode is grounded;
the second output end of the first voltage comparator and the second output end of the third voltage comparator are connected in parallel to the input end of the second and-gate circuit, the output end of the second and-gate circuit is connected with the input end of the second light-emitting diode, and the output end of the second light-emitting diode is grounded;
a third output end of the third voltage comparator is connected with an input end of the second not gate circuit, an output end of the second not gate circuit is connected with an input end of the third light emitting diode, and an output end of the third light emitting diode is grounded;
a first output end of the second voltage comparator and a fourth output end of the third voltage comparator are connected in parallel to an input end of the third and-gate circuit, an output end of the third and-gate circuit is connected with an input end of the fourth light-emitting diode, and an output end of the fourth light-emitting diode is grounded;
the second output end of the second voltage comparator is connected with the input end of the third not gate circuit, the output end of the third not gate circuit and the fifth output end of the third voltage comparator are connected in parallel to the input end of the fourth and gate circuit, the output end of the fourth and gate circuit is connected with the input end of the fifth light emitting diode, and the output end of the fifth light emitting diode is grounded.
2. The circuit of claim 1, wherein the gap between the live input probe and the live output probe is adjustable, and the gap between the neutral input probe and the neutral output probe is adjustable.
3. The electric energy meter wrong wiring fast detection circuit according to claim 1, characterized in that an eleventh resistor R11 is connected between the output end of the first and circuit and the input end of the first light emitting diode, a twelfth resistor R12 is connected between the output end of the second and circuit and the input end of the second light emitting diode, a thirteenth resistor R13 is connected between the output end of the second not circuit and the input end of the third light emitting diode, a fourteenth resistor R14 is connected between the output end of the third and circuit and the input end of the fourth light emitting diode, and a fifteenth resistor R15 is connected between the output end of the fourth and circuit and the input end of the fifth light emitting diode.
4. The circuit for rapidly detecting the wrong wiring of the electric energy meter according to claim 1, characterized in that the resistance value of the fourth resistor R4 is 4k Ω.
5. The circuit for rapidly detecting the wrong wiring of the electric energy meter as claimed in claim 1, wherein the resistances of the first resistor R1, the second resistor R2, the fifth resistor R5 and the sixth resistor R6 are equal.
6. A quick detection device for wrong wiring of an electric energy meter applies the quick detection circuit for wrong wiring of the electric energy meter according to any one of claims 1 to 5, and is characterized by comprising a shell and a handle, wherein the handle is connected with the shell, the quick detection circuit for wrong wiring of the electric energy meter is arranged in the shell, four probes are arranged at the front end of the shell, the four probes are respectively connected with a live wire input probe, a live wire output probe, a zero wire input probe and a zero wire output probe, five lamp holes are further formed in the shell, and the five lamp holes are respectively and correspondingly arranged with a first light emitting diode, a second light emitting diode, a third light emitting diode, a fourth light emitting diode and a fifth light emitting diode.
7. The device for rapidly detecting the wrong wiring of the electric energy meter according to the claim 6,
still include the alarm module, the alarm module with the electric energy meter wrong wiring quick detection circuitry electricity is connected, is used for when electric energy meter wrong wiring quick detection circuitry detects that the electric energy meter of being surveyed appears the wiring mistake, sends out alarm and reminds the signal.
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