CN115663655A - Uninterrupted meter replacing device - Google Patents
Uninterrupted meter replacing device Download PDFInfo
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- CN115663655A CN115663655A CN202211000315.7A CN202211000315A CN115663655A CN 115663655 A CN115663655 A CN 115663655A CN 202211000315 A CN202211000315 A CN 202211000315A CN 115663655 A CN115663655 A CN 115663655A
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Abstract
The invention discloses a meter replacing device without power outage, which belongs to the technical field of electric power and comprises a core control panel A1, wherein the core control panel A1 comprises an MCU (microprogrammed control Unit), an AC-DC (alternating current-direct current) circuit, a phase sampling circuit, a temperature sampling circuit, an electric parameter acquisition circuit, an input-output circuit, a COM (component object model) port circuit and a USB (universal serial bus) interface circuit, so that the technical problem of replacing a meter without power outage by detecting the phase of three-phase power is solved. The short-circuit device of the uninterrupted meter changing device can provide a safe and reliable short-circuit scheme for uninterrupted meter changing, so that a user side does not have power failure during meter changing. The accurate metering module of the whole process of the meter changing without power outage can complete the electric quantity compensation work, and the user power consumption data acquired by the metering module of the device can be accurately stored during the meter changing period.
Description
Technical Field
The invention belongs to the technical field of electric power, and particularly relates to a meter replacing device without power outage.
Background
The replacement of the electric energy meter is one of the methods for ensuring the normal operation of the electric energy metering device and the accurate transmission of information acquisition by a power supply company. When the single-phase electric energy meter is aged or has a fault, an operator needs to replace the single-phase electric energy meter. In the past, an operator needs at least 15 minutes to replace a single electric energy meter, and power failure of residents at home is needed to perform operation. Therefore, the method is time-consuming and labor-consuming and influences the normal electricity utilization of customers.
Disclosure of Invention
The invention aims to provide a meter replacing device without power outage, and the technical problem of replacing a meter without power outage by detecting the phase of three-phase power is solved.
In order to achieve the purpose, the invention adopts the following technical scheme: a kind of uninterrupted power supply changes the table device, including the core control panel A1, the core control panel A1 includes MCU, AC-DC circuit, phase sampling circuit, temperature sampling circuit, electric parameter acquisition circuit, input/output circuit, COM port circuit and USB interface circuit are all connected with MCU electricity, AC-DC circuit is MCU, phase sampling circuit, temperature sampling circuit, electric parameter acquisition circuit, input/output circuit, COM port circuit and USB interface circuit power supply;
the input end of the AC-DC circuit is connected with three-phase electricity connected with the input end of an incoming line switch K1 in a user electricity meter box, the three-phase electricity comprises A-phase electricity, B-phase electricity, C-phase electricity and N-phase electricity, the phase sampling circuit collects phase signals of the three-phase electricity through the input end of the AC-DC circuit, and the temperature sampling circuit is connected with an external temperature sensor;
the input and output circuit comprises a contactor control unit, a button unit and a buzzer unit, the contactor control unit, the button unit and the buzzer unit are all electrically connected with the MCU, the contactor control unit is used for controlling an external contactor, the button unit is used for providing a switching value starting signal and a switching value closing signal for the MCU, and the buzzer unit comprises a switching value signal isolation driving circuit composed of an optical coupler U64 and a triode D63 and is used for driving the external buzzer to send alarm sound;
the USB interface circuit comprises a FLASH module U21, a USB module U20 and a peripheral circuit thereof, wherein both the FLASH module U21 and the USB module U20 are electrically connected with the MCU, and the USB module U20 provides a USB interface for connecting an external USB FLASH disk;
the COM port circuit comprises a communication module U10 and a peripheral circuit thereof, and the communication module U10 is used for providing a serial port communication interface;
the electric parameter acquisition circuit is used for acquiring an electric signal output by the input end of an outgoing switch K2 in the electric meter box.
Preferably, the electrical parameter acquisition circuit acquires an electrical signal output by an input end of an outgoing switch K2 in the ammeter box through a current transformer CT.
Preferably, the AC-DC unit, the first voltage stabilizer unit and the second voltage stabilizer unit are formed by an inductor T1, an interface P1, an AC-DC module U1 and a peripheral circuit thereof, wherein pins 5, 4 and 3 of the interface P1 are respectively connected to PHASE C, PHASE B and PHASE a, the electrical signal of PHASE C is PHASE C, the electrical signal of PHASE B is PHASE B and PHASE a, pin 2 of the interface P1 is connected to a zero line output by an output end of an outgoing line switch K2 in the user electricity meter box, the zero line is set to zero line EX _ N, pin 1 is connected to a live line output by an output end of an outgoing line switch K2 in the user electricity meter box, and the live line is set to live line COM _ PHASE; a pin 3 of the inductor T1 is connected with a pin 5 of the interface P1 through a fuse F1 and an interface P2 which are connected in series, a pin 1 of the inductor T1 is connected with a zero line EX _ N, a pin 4 and a pin 2 of the inductor T1 are connected with an input end of the AC-DC module U1, and an output end of the AC-DC module U1 outputs a 12V power supply;
the interface P2 is connected with an external switch;
the input end of the first voltage stabilizer unit and the input end of the second voltage stabilizer unit are both connected with a 12V power supply, the first voltage stabilizer unit outputs a VCC power supply, and the second voltage stabilizer unit outputs a 3.3V power supply;
the VCC power supply provides driving voltage for the COM port circuit and the USB port circuit.
Preferably, the contactor control unit comprises an A-phase contactor control unit, a B-phase contactor control unit and a C-phase contactor control unit, the A-phase contactor control unit comprises a wiring terminal P60, a resistor R62, an optocoupler U60, a relay K60, a triode D61, a resistor R64 and a resistor R65, a pin 1 of the optocoupler U60 is connected with a 3.3V power supply, a pin 2 is connected with one IO port of an MCU through the resistor R62, the pin 3 is connected with a base of the triode D61 through the resistor R64, a pin 4 is connected with the 12V power supply, one end of a coil of the relay K60 is connected with the 12V power supply, the other end of the coil is connected with a collector of the triode D61, an emitter of the triode D61 is connected with a ground wire, one end of the resistor R65 is connected with the base of the triode D61, the other end of the resistor D61 is connected with an emitter of the triode D61, a common end of the relay D60 is connected with a zero line EX _ N and the pin 2 of the normally-open terminal P60, and the pin 1 of the wiring terminal P60 is connected with the pin 3 of an inductor T1;
the wiring terminal P60 is connected with an external multi-circuit loop line control relay K4 and is used for controlling the multi-circuit loop line control relay K4 to switch the A-phase electricity;
the circuit principle structure of the B-phase contactor control unit and the C-phase contactor control unit is the same as that of the A-phase contactor control unit;
the B-phase contactor control unit is connected with an external multi-circuit loop line control relay K4 through a wiring terminal P63 and is used for controlling the multi-circuit loop line control relay K4 to switch B-phase electricity;
the C-phase contactor control unit is connected with an external multi-circuit loop line control relay K4 through a wiring terminal P65 and is used for controlling the multi-circuit loop line control relay K4 to switch C-phase electricity;
the button unit comprises an interface P61, an interface P62, a resistor R63, a resistor R66, an optical coupler U61, an optical coupler U62, a resistor R60 and a resistor R61, the ground wire is connected with the pin 1 of the interface P61 and the pin 1 of the interface P62, the pin 2 of the interface P61 is connected with the pin 2 of the optical coupler U61 through the resistor R62, the pin 2 of the interface P62 is connected with the pin 2 of the optical coupler U62 through the resistor R66, the pin 1 of the optical coupler U61 and the pin 1 of the optical coupler U62 are connected with a 12V power supply, the pin 3 of the optical coupler U61 and the pin 3 of the optical coupler U62 are connected with the ground wire, the pin 4 of the optical coupler U61 and the pin 4 of the optical coupler U62 are respectively connected with different IO ports of an MCU, the resistor R60 and the resistor R61 are respectively pull-up resistors on the pin 4 of the optical coupler U61 and the pin 4 of the optical coupler U62, and the interface P61 and the interface P62 are respectively connected with two external buttons for providing the switching value starting signal and the switching value closing signal.
Preferably, the phase sampling circuit includes a resistor R40, a resistor R43, a resistor R44, a resistor R47, a resistor R48, a resistor R51, a resistor R52, a resistor R55, a rectifier D40, a rectifier D41, a rectifier D42, a rectifier D43, a resistor R42, a resistor R46, a resistor R50, a resistor R54, an optocoupler U40, an optocoupler U42, an optocoupler U43, an optocoupler U44, a resistor R41, a resistor R45, a resistor R49, a resistor R53, and an and gate U41, the and gate U41 includes an and gate U41C, an and gate U41B, an and gate U41A and a gate U41D, the 4 pin of the rectifier D40 is connected to the 3 pin of the interface P1 through the resistor R40, the 2 pin of the interface P1 through the resistor R43, the 3 pin is connected to the 2 pin of the optocoupler U40, the 1 pin is connected to the 1 pin of the optocoupler U40 through the resistor R42, the 4 pin of the U40 is connected to the 9 pin and the 3 pin of the and the ground, the resistor R41 is connected to the ground, and the optocoupler U11;
a pin 4 of the rectifier D41 is connected with a pin 4 of the interface P1 through a resistor R44, a pin 2 of the interface P1 is connected with a pin 2 of the optical coupler U42 through a resistor R47, a pin 3 of the optical coupler U42 is connected with a pin 2 of the interface P1, a pin 1 of the optical coupler U42 is connected with a pin 1 of the optical coupler U42 through a resistor R46, a pin 4 of the optical coupler U42 is connected with a pin 4 of the AND gate 41, a pin 3 of the optical coupler U42 is connected with a ground wire, a resistor R45 is a pull-up resistor of the pin 4 of the optical coupler U42, and a pin 5 of the AND gate U41 is connected with a pin 11 of the AND gate U41;
a pin 4 of the rectifier D42 is connected with a pin 5 of the interface P1 through a resistor R48, a pin 2 of the interface P1 is connected with a pin 2 of the interface P1 through a resistor R51, a pin 3 of the optical coupler U43 is connected with a pin 2 of the optical coupler U43, a pin 1 of the optical coupler U43 is connected with a pin 1 of the AND gate 41 through a resistor R50, a pin 4 of the optical coupler U43 is connected with a pin 3 of the AND gate 41, the pin 3 of the AND gate U41 is connected with a ground wire, a resistor R49 is a pull-up resistor for the pin 4 of the optical coupler U43, and the pin 2 of the AND gate U41 is connected with a pin 11 of the AND gate U41;
the 4 feet of the rectifier D43 are connected with the 1 foot of the interface P1 through a resistor R52, the 2 feet of the interface P1 are connected with the 2 feet of the 3 feet of the optical coupler U44 through a resistor R55, the 1 foot of the optical coupler U44 is connected with the 2 feet of the optical coupler U44 through a resistor R54, the 4 feet of the optical coupler U44 are connected with the 12 feet and the 13 feet of the AND gate 41, the 3 feet of the optical coupler U44 are connected with a ground wire, the resistor R53 is a pull-up resistor of the 4 feet of the optical coupler U44, and the 11 feet, the 3 feet, the 6 feet and the 8 feet of the AND gate U41 are respectively connected with different IO ports of the MUC. Preferably, the electric parameter acquisition circuit includes interface P31, interface P32, opto-coupler U33 and electric energy metering module U32, 2 feet and 1 foot of interface P31 are connected respectively to 7 feet and 6 feet of electric energy metering module U32, 3.3V power is connected to 4 feet of electric energy metering module U32, 3 feet and 2 feet are connected MCU's different IO mouth respectively, 1 foot of opto-coupler U33 is connected to 1 foot, 5 feet are connected the ground wire, 2 feet of opto-coupler U33 are connected the ground wire, 3 feet and 4 feet are connected interface P32's 1 foot and 2 feet respectively, interface P31 connects current transformer CT.
Preferably, the temperature sampling circuit includes a first temperature sensor interface unit, a second temperature sensor interface unit, a third temperature sensor interface unit and a fourth temperature sensor interface unit, the first temperature sensor interface unit includes an interface J30, a resistor R30 and a capacitor C30, a pin 2 of the interface J30 is connected to one IO port of the MCU, a pin 1 is connected to the ground, the resistor R30 is a pull-up resistor on a pin 2 of the interface J30, and the capacitor C30 is a filter capacitor of a pin 2 of the interface J30;
the circuit principle structures of the second temperature sensor interface unit, the third temperature sensor interface unit and the fourth temperature sensor interface unit are the same as those of the first temperature sensor interface unit.
Preferably, the STM32F103C8T6, the model of the FLASH module U21 is W25Q128JVSIQ, the model of the USB module U20 is CH376T, and the model of the communication module U10 is MAX3232ESE.
Preferably, the incoming line end of the multi-circuit line control relay K4 is connected with the three-phase power connected with the input end of the incoming line switch K1; and the wire outlet end of the multi-circuit line control relay K4 is connected with the output end of a wire outlet switch K2 in the user electric meter box.
The invention relates to a meter changing device without power outage, which solves the technical problem of realizing meter changing without power outage by detecting the phase of three-phase power. The short-circuit device of the uninterrupted meter changing device can provide a safe and reliable short-circuit scheme for uninterrupted meter changing, so that a user side does not have power failure during meter changing. The accurate metering module of the whole process of not having a power failure and changing the table can accomplish the work of electric quantity compensation, ensures that the user power consumption data that is gathered by the metering module of device self-carrying during changing the table can accurate storage, and the electric power company can carry out the electric quantity compensation according to this data to make the loss of electric power company during changing the table reduce to minimum. The uninterrupted meter changing device integrates the research contents into a whole, provides available equipment for meter changing operation, and guarantees operability, safety, high efficiency and accuracy of uninterrupted meter changing.
Drawings
FIG. 1 is a schematic block diagram of the present invention;
FIG. 2 is a circuit diagram of the AC-DC circuit of the present invention;
FIG. 3 is a circuit diagram of the phase sampling circuit of the present invention;
FIG. 4 is a circuit diagram of the temperature sampling circuit of the present invention;
FIG. 5 is a circuit diagram of an electrical parameter acquisition circuit of the present invention;
FIG. 6 is a circuit diagram of the contactor control unit of the present invention;
FIG. 7 is a circuit diagram of the button unit of the present invention;
fig. 8 is a circuit diagram of a buzzer unit of the present invention;
FIG. 9 is a circuit diagram of the COM port circuit of the present invention;
FIG. 10 is a USB interface circuit of the present invention;
FIG. 11 is a circuit diagram of the MCU of the present invention;
fig. 12 is a wiring diagram of the present invention in practical use with a consumer meter box and an external loop by-wire relay.
Detailed Description
The uninterrupted meter changing device shown in the figures 1-12 comprises a core control panel A1, wherein the core control panel A1 comprises an MCU, an AC-DC circuit, a phase sampling circuit, a temperature sampling circuit, an electrical parameter acquisition circuit, an input and output circuit, a COM port circuit and a USB interface circuit, the phase sampling circuit, the temperature sampling circuit, the electrical parameter acquisition circuit, the input and output circuit, the COM port circuit and the USB interface circuit are all electrically connected with the MCU, and the AC-DC circuit supplies power for the MCU, the phase sampling circuit, the temperature sampling circuit, the electrical parameter acquisition circuit, the input and output circuit, the COM port circuit and the USB interface circuit;
the input end of the AC-DC circuit is connected with three-phase electricity connected with the input end of an incoming line switch K1 in a user electricity meter box, the three-phase electricity comprises A-phase electricity, B-phase electricity, C-phase electricity and N-phase electricity, the phase sampling circuit collects phase signals of the three-phase electricity through the input end of the AC-DC circuit, and the temperature sampling circuit is connected with an external temperature sensor;
in this embodiment, the temperature sensor adopts an NTC temperature sensor, an internal AD conversion is provided in the MCU, and the temperature sensor is connected to an AD interface of the MCU.
The input and output circuit comprises a contactor control unit, a button unit and a buzzer unit, the contactor control unit, the button unit and the buzzer unit are all electrically connected with the MCU, the contactor control unit is used for controlling an external contactor, the button unit is used for providing a switching value starting signal and a switching value closing signal for the MCU, and the buzzer unit comprises a switching value signal isolation driving circuit composed of an optical coupler U64 and a triode D63 and is used for driving the external buzzer to send alarm sound;
the USB interface circuit comprises a FLASH module U21, a USB module U20 and peripheral circuits thereof, the FLASH module U21 and the USB module U20 are electrically connected with the MCU, and the USB module U20 provides a USB interface for connecting an external USB FLASH disk;
the COM port circuit comprises a communication module U10 and a peripheral circuit thereof, and the communication module U10 is used for providing a serial port communication interface;
the electric parameter acquisition circuit is used for acquiring an electric signal output by the input end of an outgoing switch K2 in the electric meter box.
The electric parameter acquisition circuit acquires an electric signal output by the input end of an outgoing switch K2 in the electric meter box through a current transformer CT.
In this embodiment, in the practical use process, the user ammeter box includes incoming line switch K1, outgoing line switch K2 and ammeter WH, the input end of incoming line switch K1 is connected with the three-PHASE electricity, the input end of outgoing line switch K2 is connected with the incoming line end of ammeter, the input end of outgoing line switch K2 is connected with the outgoing line end of ammeter, the output end outputs zero line EX _ N and live wire COM _ PHASE.
The wiring in the consumer meter box is prior art and will not be described in detail.
The current transformer CT is arranged on the live wire COM _ PHASE.
The AC-DC unit consists of an inductor T1, an interface P1, an AC-DC module U1 and a peripheral circuit thereof, pins 5, 4 and 3 of the interface P1 are respectively connected with C-PHASE C PHASE, B-PHASE B PHASE and A-PHASE A PHASE, pin 2 of the interface P1 is connected with a zero line EX _ N output by the output end of an outgoing line switch K2 in the user electric meter box, and pin 1 is connected with a live line COM _ PHASE output by the output end of an outgoing line switch K2 in the user electric meter box; a pin 3 of the inductor T1 is connected with a pin 5 of the interface P1 through a fuse F1 and an interface P2 which are connected in series, a pin 1 of the inductor T1 is connected with a zero line EX _ N, a pin 4 and a pin 2 of the inductor T1 are connected with the input end of the AC-DC module U1, and the output end of the AC-DC module U1 outputs a 12V power supply;
the interface P2 is connected to an external switch, which is a power switch of the core control board A1.
The input end of the first voltage stabilizer unit and the input end of the second voltage stabilizer unit are both connected with a 12V power supply, the first voltage stabilizer unit outputs a VCC power supply, and the second voltage stabilizer unit outputs a 3.3V power supply;
the VCC power supply provides driving voltage for the COM port circuit and the USB interface circuit.
The contactor control unit comprises an A-phase contactor control unit, a B-phase contactor control unit and a C-phase contactor control unit, the A-phase contactor control unit comprises a wiring terminal P60, a resistor R62, an optocoupler U60, a relay K60, a triode D61, a resistor R64 and a resistor R65, a pin 1 of the optocoupler U60 is connected with a 3.3V power supply, a pin 2 is connected with one IO port of an MCU through the resistor R62, the pin 3 is connected with a base electrode of the triode D61 through the resistor R64, a pin 4 is connected with the 12V power supply, one end of a coil of the relay K60 is connected with the 12V power supply, the other end of the coil of the triode D61 is connected with a collector electrode of the triode D61, an emitter electrode of the triode D61 is connected with one end of the resistor R65, the other end of the resistor R61 is connected with an emitter electrode of the triode D61, a common end of the relay D60 is connected with a zero line EX _ N, the pin 2 of the wiring terminal P60 at the normally open end, and a pin 1 of the wiring terminal P60 is connected with a pin 3 of an inductor T1;
the wiring terminal P60 is connected with an external multi-circuit loop line control relay K4 and is used for controlling the multi-circuit loop line control relay K4 to switch the A-phase electricity;
the circuit principle structure of the B-phase contactor control unit and the C-phase contactor control unit is the same as that of the A-phase contactor control unit;
the B-phase contactor control unit is connected with an external multi-circuit loop line control relay K4 through a wiring terminal P63 and is used for controlling the multi-circuit loop line control relay K4 to switch B-phase electricity;
and the C-phase contactor control unit is connected with an external multi-circuit loop line control relay K4 through a wiring terminal P65 and is used for controlling the multi-circuit loop line control relay K4 to switch C-phase electricity.
In this embodiment, can set up a bypass power box beside user's ammeter case at the in-process of trading the ammeter, multichannel return circuit drive-by-wire relay K4 and core control panel A1 all can set up in bypass power box to conveniently carry out the wiring.
And the wire inlet end of the multi-circuit loop wire control relay K4 is connected with three-phase electricity, C-phase electricity, B-phase electricity, A-phase electricity and N-phase electricity which are connected with the input end of the wire inlet switch K1.
And the wire outlet end of the multi-circuit line control relay K4 is connected with the output end of a wire outlet switch K2 in the user electric meter box, namely the zero line EX _ N and the live line COM _ PHASE.
The button unit comprises an interface P61, an interface P62, a resistor R63, a resistor R66, an optical coupler U61, an optical coupler U62, a resistor R60 and a resistor R61, the ground wire is connected to the pin 1 of the interface P61 and the pin 1 of the interface P62, the pin 2 of the interface P61 is connected with the pin 2 of the optical coupler U61 through the resistor R62, the pin 2 of the interface P62 is connected with the pin 2 of the optical coupler U62 through the resistor R66, the pin 1 of the optical coupler U61 and the pin 1 of the optical coupler U62 are both connected with a 12V power supply, the pin 3 of the optical coupler U61 and the pin 3 of the optical coupler U62 are both connected with the ground wire, the pin 4 of the optical coupler U61 and the pin 4 of the optical coupler U62 are respectively connected with different IO ports of an MCU, the resistor R60 and the resistor R61 are respectively pull-up resistors on the pin 4 of the optical coupler U61 and the pin 4 of the optical coupler U62, the interface P61 and the interface P62 are respectively connected with two external buttons, START signals can be used for connecting START signals and disconnecting from STOP signals.
The phase sampling circuit comprises a resistor R40, a resistor R43, a resistor R44, a resistor R47, a resistor R48, a resistor R51, a resistor R52, a resistor R55, a rectifier D40, a rectifier D41, a rectifier D42, a rectifier D43, a resistor R42, a resistor R46, a resistor R50, a resistor R54, an optical coupler U40, an optical coupler U42, an optical coupler U43, an optical coupler U44, a resistor R41, a resistor R45, a resistor R49, a resistor R53 and an AND gate U41, wherein the AND gate U41 comprises an AND gate U41C, an AND gate U41B, an AND gate U41A and an AND gate U41D, a 4 pin of the rectifier D40 is connected with a 3 pin of an interface P1 through the resistor R40, a 2 pin of the interface P1 through the resistor R43 is connected with a 2 pin of the optical coupler U40, a1 pin is connected with a1 pin of the optical coupler U40 through the resistor R42, a 4 pin of the optical coupler U40 is connected with a 9 pin and a 3 pin of the AND gate 41, and a ground wire, the resistor R41 is a pull-up pin of the optical coupler U41 of the U40, and a pull pin of the AND gate U11 of the AND gate U41;
a pin 4 of the rectifier D41 is connected with a pin 4 of the interface P1 through a resistor R44, a pin 2 of the interface P1 is connected with a pin 2 of the optical coupler U42 through a resistor R47, a pin 3 of the optical coupler U42 is connected with a pin 2 of the interface P1, a pin 1 of the optical coupler U42 is connected with a pin 1 of the optical coupler U42 through a resistor R46, a pin 4 of the optical coupler U42 is connected with a pin 4 of the AND gate 41, a pin 3 of the optical coupler U42 is connected with a ground wire, a resistor R45 is a pull-up resistor of the pin 4 of the optical coupler U42, and a pin 5 of the AND gate U41 is connected with a pin 11 of the AND gate U41;
a pin 4 of the rectifier D42 is connected with a pin 5 of the interface P1 through a resistor R48, a pin 2 of the interface P1 is connected with a pin 2 of the optocoupler U43 through a resistor R51, a pin 3 of the optocoupler U43 is connected with a pin 2 of the optocoupler U43, a pin 1 of the optocoupler U43 is connected with a pin 1 of the AND gate 41 through a resistor R50, a pin 4 of the optocoupler U43 is connected with a pin 3 of the AND gate 41, and a pin R49 is a pull-up resistor of the pin 4 of the optocoupler U43, and a pin 2 of the AND gate U41 is connected with a pin 11 of the AND gate U41;
the 4 feet of the rectifier D43 are connected with the 1 foot of the interface P1 through a resistor R52, the 2 feet of the interface P1 are connected through a resistor R55, the 3 feet of the optocoupler U44 are connected with the 2 feet of the optocoupler U44, the 1 foot of the optocoupler U44 is connected with the 1 foot of the optocoupler U44 through a resistor R54, the 4 feet of the optocoupler U44 are connected with the 12 feet and the 13 feet of the AND gate 41, the 3 feet of the optocoupler U44 are connected with a ground wire, the resistor R53 is a pull-up resistor of the 4 feet of the optocoupler U44, and the 11 feet, the 3 feet, the 6 feet and the 8 feet of the AND gate U41 are respectively connected with different IO ports of the MUC.
In the using process, the 4 feet of the rectifier D40, the 4 feet of the rectifier D41 and the 4 feet of the rectifier D42 are respectively used for acquiring PHASE data of A-PHASE electricity, B-PHASE electricity and C-PHASE electricity, the 4 feet of the rectifier D43 are used for acquiring the PHASE of a live line COM _ PHASE, PHASE comparison is carried out through a logic and circuit formed by an AND gate U41C, an AND gate U41B, an AND gate U41A and an AND gate U41D, when enabling signals are generated according to the same PHASE, the MCU carries out corresponding control according to an A-PHASE contactor control unit, a C-PHASE contactor control unit and a B-PHASE contactor control unit corresponding to the enabling signals, and therefore control over the loop line control relay is achieved, for example, when the PHASE a PHASE signal of the a-PHASE power collected by the 4-pin of the rectifier D40 is the same as the PHASE signal of the live wire COM _ PHASE collected by the 4-pin of the rectifier D43, in the logical and circuit, the choking U41C outputs a high level signal, i.e., INTA, and at this time, after the MCU monitors the INTA signal, the PHASE a contactor control unit is controlled to operate, so that the relay K60 is closed, so that the pin 2 of the interface P60 is connected to the zero line EX _ N, and since the pin 1 of the interface P60 is connected to the pin 3 of the inductor T1, the power supply voltage can be obtained through the interface P2 and the fuse F1 (in this embodiment, the C-PHASE C PHASE is used to provide the working voltage), and at this time, the multi-path line control relay K4 can obtain the control voltage through the interface P60 to switch the PHASE a circuit.
In this embodiment, the multi-loop line-control relay K4 may also be replaced by 3 loop line-control relays, where the three loop line-control relays are respectively used to control switching of the a-phase line, switching of the B-phase line, and switching of the C-phase line, and the three loop line-control relays are respectively controlled by the a-phase contactor control unit, the B-phase contactor control unit, and the C-phase contactor control unit.
The electric parameter acquisition circuit includes interface P31, interface P32, opto-coupler U33 and electric energy metering module U32, 2 feet and 1 foot of interface P31 are connected respectively to 7 feet and 6 feet of electric energy metering module U32, 3.3V power is connected to 4 feet of electric energy metering module U32, MCU's different IO mouths are connected respectively to 3 feet and 2 feet, 1 foot of opto-coupler U33 is connected to 1 foot, 5 feet are connected the ground wire, 2 feet of opto-coupler U33 are connected the ground wire, 3 feet and 4 feet are connected interface P32's 1 foot and 2 feet respectively, interface P31 connects current transformer CT.
In this embodiment, the model of the electric energy metering module U32 is IM1281B.
The electric energy metering module U32 can directly measure the electric energy data at the outlet of the electric meter WH through the current transformer CT and display the electric energy data through the display screen.
The temperature sampling circuit comprises a first temperature sensor interface unit, a second temperature sensor interface unit, a third temperature sensor interface unit and a fourth temperature sensor interface unit, wherein the first temperature sensor interface unit comprises an interface J30, a resistor R30 and a capacitor C30, a pin 2 of the interface J30 is connected with one IO port of the MCU, a pin 1 of the interface J30 is connected with a ground wire, the resistor R30 is a pull-up resistor on the pin 2 of the interface J30, and the capacitor C30 is a filter capacitor of the pin 2 of the interface J30;
the circuit principle structures of the second temperature sensor interface unit, the third temperature sensor interface unit and the fourth temperature sensor interface unit are the same as those of the first temperature sensor interface unit.
The model of the FLASH module U21 is W25Q128JVSIQ, the model of the USB module U20 is CH376T, and the model of the communication module U10 is MAX3232ESE, of the STM32F103C8T 6.
In this embodiment, as shown in fig. 9, the serial port communication interface of the communication module U10 includes two, one is connected to the code scanner for the interface P10; one is P11 connected to the touch screen or display.
In this embodiment, in the normal electricity meter changing process, after the wiring of the multi-circuit line control relay K4 is confirmed to be correct, the key connected to the interface P2 is pressed to send a start signal, the core control board A1 automatically judges the phase sequence of the input and output ends, and then the multi-circuit line control relay K4 is controlled to perform corresponding switching, so that the correct working state is achieved, the screen display shows that the connection is correct, and at this time, a worker can perform related maintenance and electricity meter changing work.
During normal work, in this embodiment, can install a display screen on the ammeter case of bypass for show the voltage value, the current value, the line connector binding post temperature value of accessing the return circuit, and record this time consumption of accessing work, the display screen can communicate with core control panel A1 through 232 serial ports bus, reads display data and shows, and the staff can effectively judge according to these data whether to access the return circuit normal. If the access circuit is suddenly abnormal in the construction process, the main control module sends an instruction to reset the circuit relay to disconnect the access circuit, so that the safety of constructors is ensured.
After the construction is finished, a release button is started, namely a STOP switching value signal acquired by the optical coupler U62 is obtained, the main machine immediately resets the line control relay, the line control relay is separated from a power supply loop of the device, and a worker removes a line connector.
The invention relates to a meter changing device without power outage, which solves the technical problem of realizing meter changing without power outage by detecting the phase of three-phase power. The short-circuit device of the uninterrupted meter changing device can provide a safe and reliable short-circuit scheme for the uninterrupted meter changing, so that a user side does not have power failure during the meter changing period. The accurate metering module of the whole process of not having a power failure and changing the table can accomplish the work of electric quantity compensation, ensures that the user power consumption data that is gathered by the metering module of device self-carrying during changing the table can accurate storage, and the electric power company can carry out the electric quantity compensation according to this data to make the loss of electric power company during changing the table reduce to minimum. The uninterrupted meter changing device integrates the research contents into a whole, provides available equipment for meter changing operation, and guarantees operability, safety, high efficiency and accuracy of uninterrupted meter changing.
Claims (9)
1. The utility model provides a not have a power failure and trade table device which characterized in that: comprises a core control board A1, wherein the core control board A1 comprises an MCU, an AC-DC circuit, a phase sampling circuit, a temperature sampling circuit, an electrical parameter acquisition circuit, an input and output circuit, a COM port circuit and a USB interface circuit, the phase sampling circuit, the temperature sampling circuit, the electrical parameter acquisition circuit, the input-output circuit, the COM port circuit and the USB interface circuit are all electrically connected with the MCU, and the AC-DC circuit supplies power to the MCU, the phase sampling circuit, the temperature sampling circuit, the electrical parameter acquisition circuit, the input-output circuit, the COM port circuit and the USB interface circuit;
the input end of the AC-DC circuit is connected with three-phase electricity connected with the input end of an incoming line switch K1 in a user electricity meter box, the three-phase electricity comprises A-phase electricity, B-phase electricity, C-phase electricity and N-phase electricity, the phase sampling circuit collects phase signals of the three-phase electricity through the input end of the AC-DC circuit, and the temperature sampling circuit is connected with an external temperature sensor;
the input and output circuit comprises a contactor control unit, a button unit and a buzzer unit, the contactor control unit, the button unit and the buzzer unit are all electrically connected with the MCU, the contactor control unit is used for controlling an external contactor, the button unit is used for providing a switching value starting signal and a switching value closing signal for the MCU, and the buzzer unit comprises a switching value signal isolation driving circuit composed of an optical coupler U64 and a triode D63 and is used for driving the external buzzer to send alarm sound;
the USB interface circuit comprises a FLASH module U21, a USB module U20 and a peripheral circuit thereof, wherein both the FLASH module U21 and the USB module U20 are electrically connected with the MCU, and the USB module U20 provides a USB interface for connecting an external USB FLASH disk;
the COM port circuit comprises a communication module U10 and a peripheral circuit thereof, and the communication module U10 is used for providing a serial port communication interface;
the electric parameter acquisition circuit is used for acquiring an electric signal output by the input end of an outgoing switch K2 in the electric meter box.
2. The device for changing a watch without power failure as claimed in claim 1, wherein: the electric parameter acquisition circuit acquires an electric signal output by the input end of an outgoing switch K2 in the electric meter box through a current transformer CT.
3. A non-stop meter-changing apparatus as claimed in claim 2, wherein: the AC-DC unit comprises an inductor T1, an interface P1, an AC-DC module U1 and a peripheral circuit thereof, pins 5, 4 and 3 of the interface P1 are respectively connected with C-PHASE electricity, B-PHASE electricity and A-PHASE electricity, the electric signal of the C-PHASE electricity is set to be C-PHASE C PHASE, the electric signal of the B-PHASE electricity is B-PHASE B PHASE and the electric signal of the A-PHASE electricity is A-PHASE A PHASE, pin 2 of the interface P1 is connected with a zero line output by the output end of an outgoing switch K2 in the user ammeter box, the zero line is set to be zero line EX _ N, pin 1 is connected with a live wire output by the output end of the outgoing switch K2 in the user ammeter box, and the live wire is set to be live wire COM _ PHASE; a pin 3 of the inductor T1 is connected with a pin 5 of the interface P1 through a fuse F1 and an interface P2 which are connected in series, a pin 1 of the inductor T1 is connected with a zero line EX _ N, a pin 4 and a pin 2 of the inductor T1 are connected with the input end of the AC-DC module U1, and the output end of the AC-DC module U1 outputs a 12V power supply;
the interface P2 is connected with an external switch;
the input end of the first voltage stabilizer unit and the input end of the second voltage stabilizer unit are both connected with a 12V power supply, the first voltage stabilizer unit outputs a VCC power supply, and the second voltage stabilizer unit outputs a 3.3V power supply;
the VCC power supply provides driving voltage for the COM port circuit and the USB interface circuit.
4. A non-stop meter-changing apparatus as claimed in claim 3, wherein: the contactor control unit comprises an A-phase contactor control unit, a B-phase contactor control unit and a C-phase contactor control unit, the A-phase contactor control unit comprises a wiring terminal P60, a resistor R62, an optocoupler U60, a relay K60, a triode D61, a resistor R64 and a resistor R65, a pin 1 of the optocoupler U60 is connected with a 3.3V power supply, a pin 2 is connected with one IO port of an MCU through the resistor R62, the pin 3 is connected with a base electrode of the triode D61 through the resistor R64, a pin 4 is connected with the 12V power supply, one end of a coil of the relay K60 is connected with the 12V power supply, the other end of the coil of the triode D61 is connected with a collector electrode of the triode D61, an emitter electrode of the triode D61 is connected with one end of the resistor R65, the other end of the resistor R61 is connected with an emitter electrode of the triode D61, a common end of the relay D60 is connected with a zero line EX _ N, the pin 2 of the wiring terminal P60 at the normally open end, and a pin 1 of the wiring terminal P60 is connected with a pin 3 of an inductor T1;
the wiring terminal P60 is connected with an external multi-circuit loop line control relay K4 and is used for controlling the multi-circuit loop line control relay K4 to switch the A-phase electricity;
the circuit principle structure of the B-phase contactor control unit and the C-phase contactor control unit is the same as that of the A-phase contactor control unit;
the B-phase contactor control unit is connected with an external multi-circuit loop line control relay K4 through a wiring terminal P63 and is used for controlling the multi-circuit loop line control relay K4 to switch B-phase electricity;
the C-phase contactor control unit is connected with an external multi-circuit loop line control relay K4 through a wiring terminal P65 and is used for controlling the multi-circuit loop line control relay K4 to switch C-phase electricity;
the button unit comprises an interface P61, an interface P62, a resistor R63, a resistor R66, an optical coupler U61, an optical coupler U62, a resistor R60 and a resistor R61, the ground wire is connected with the pin 1 of the interface P61 and the pin 1 of the interface P62, the pin 2 of the interface P61 is connected with the pin 2 of the optical coupler U61 through the resistor R62, the pin 2 of the interface P62 is connected with the pin 2 of the optical coupler U62 through the resistor R66, the pin 1 of the optical coupler U61 and the pin 1 of the optical coupler U62 are connected with a 12V power supply, the pin 3 of the optical coupler U61 and the pin 3 of the optical coupler U62 are connected with the ground wire, the pin 4 of the optical coupler U61 and the pin 4 of the optical coupler U62 are respectively connected with different IO ports of an MCU, the resistor R60 and the resistor R61 are respectively pull-up resistors on the pin 4 of the optical coupler U61 and the pin 4 of the optical coupler U62, and the interface P61 and the interface P62 are respectively connected with two external buttons for providing the switching value starting signal and the switching value closing signal.
5. A non-stop meter changing device according to claim 3, wherein: the phase sampling circuit comprises a resistor R40, a resistor R43, a resistor R44, a resistor R47, a resistor R48, a resistor R51, a resistor R52, a resistor R55, a rectifier D40, a rectifier D41, a rectifier D42, a rectifier D43, a resistor R42, a resistor R46, a resistor R50, a resistor R54, an optical coupler U40, an optical coupler U42, an optical coupler U43, an optical coupler U44, a resistor R41, a resistor R45, a resistor R49, a resistor R53 and an AND gate U41, wherein the AND gate U41 comprises an AND gate U41C, an AND gate U41B, an AND gate U41A and an AND gate U41D, a 4 pin of the rectifier D40 is connected with a 3 pin of an interface P1 through the resistor R40, a 2 pin of the interface P1 through the resistor R43 is connected with a 2 pin of the optical coupler U40, a1 pin is connected with a1 pin of the optical coupler U40 through the resistor R42, a 4 pin of the optical coupler U40 is connected with a 9 pin and a 3 pin of the AND gate 41, and a ground wire, the resistor R41 is a pull-up pin of the optical coupler U41 of the U40, and a pull pin of the AND gate U11 of the AND gate U41;
a pin 4 of the rectifier D41 is connected with a pin 4 of the interface P1 through a resistor R44, a pin 2 of the interface P1 is connected with a pin 2 of the optical coupler U42 through a resistor R47, a pin 3 of the optical coupler U42 is connected with a pin 2 of the interface P1, a pin 1 of the optical coupler U42 is connected with a pin 1 of the optical coupler U42 through a resistor R46, a pin 4 of the optical coupler U42 is connected with a pin 4 of the AND gate 41, a pin 3 of the optical coupler U42 is connected with a ground wire, a resistor R45 is a pull-up resistor of the pin 4 of the optical coupler U42, and a pin 5 of the AND gate U41 is connected with a pin 11 of the AND gate U41;
a pin 4 of the rectifier D42 is connected with a pin 5 of the interface P1 through a resistor R48, a pin 2 of the interface P1 is connected with a pin 2 of the interface P1 through a resistor R51, a pin 3 of the optical coupler U43 is connected with a pin 2 of the optical coupler U43, a pin 1 of the optical coupler U43 is connected with a pin 1 of the AND gate 41 through a resistor R50, a pin 4 of the optical coupler U43 is connected with a pin 3 of the AND gate 41, the pin 3 of the AND gate U41 is connected with a ground wire, a resistor R49 is a pull-up resistor for the pin 4 of the optical coupler U43, and the pin 2 of the AND gate U41 is connected with a pin 11 of the AND gate U41;
the 4 feet of the rectifier D43 are connected with the 1 foot of the interface P1 through a resistor R52, the 2 feet of the interface P1 are connected with the 2 feet of the 3 feet of the optical coupler U44 through a resistor R55, the 1 foot of the optical coupler U44 is connected with the 2 feet of the optical coupler U44 through a resistor R54, the 4 feet of the optical coupler U44 are connected with the 12 feet and the 13 feet of the AND gate 41, the 3 feet of the optical coupler U44 are connected with a ground wire, the resistor R53 is a pull-up resistor of the 4 feet of the optical coupler U44, and the 11 feet, the 3 feet, the 6 feet and the 8 feet of the AND gate U41 are respectively connected with different IO ports of the MUC.
6. A non-stop meter-changing apparatus as claimed in claim 3, wherein: the electric parameter acquisition circuit includes interface P31, interface P32, opto-coupler U33 and electric energy metering module U32, 2 feet and 1 foot of interface P31 are connected respectively to 7 feet and 6 feet of electric energy metering module U32, 3.3V power is connected to 4 feet of electric energy metering module U32, MCU's different IO mouths are connected respectively to 3 feet and 2 feet, 1 foot of opto-coupler U33 is connected to 1 foot, 5 feet are connected the ground wire, 2 feet of opto-coupler U33 are connected the ground wire, 3 feet and 4 feet are connected interface P32's 1 foot and 2 feet respectively, interface P31 connects current transformer CT.
7. The device for changing a watch without power failure as claimed in claim 1, wherein: the temperature sampling circuit comprises a first temperature sensor interface unit, a second temperature sensor interface unit, a third temperature sensor interface unit and a fourth temperature sensor interface unit, wherein the first temperature sensor interface unit comprises an interface J30, a resistor R30 and a capacitor C30, 2 pins of the interface J30 are connected with one IO port of the MCU, 1 pin of the interface J30 is connected with a ground wire, the resistor R30 is a pull-up resistor on 2 pins of the interface J30, and the capacitor C30 is a filter capacitor of 2 pins of the interface J30;
the circuit principle structures of the second temperature sensor interface unit, the third temperature sensor interface unit and the fourth temperature sensor interface unit are the same as those of the first temperature sensor interface unit.
8. The device for changing a watch without power failure as claimed in claim 1, wherein: the model of the FLASH module U21 is W25Q128JVSIQ, the model of the USB module U20 is CH376T, and the model of the communication module U10 is MAX3232ESE, of the STM32F103C8T 6.
9. The device for changing tables without power outage of claim 4, wherein: the inlet wire end of the multi-circuit line control relay K4 is connected with the three-phase power connected with the input end of the inlet wire switch K1; and the wire outlet end of the multi-circuit line control relay K4 is connected with the output end of a wire outlet switch K2 in the user electric meter box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211000315.7A CN115663655A (en) | 2022-08-19 | 2022-08-19 | Uninterrupted meter replacing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211000315.7A CN115663655A (en) | 2022-08-19 | 2022-08-19 | Uninterrupted meter replacing device |
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| Publication Number | Publication Date |
|---|---|
| CN115663655A true CN115663655A (en) | 2023-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211000315.7A Pending CN115663655A (en) | 2022-08-19 | 2022-08-19 | Uninterrupted meter replacing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117856084A (en) * | 2024-03-08 | 2024-04-09 | 国网江苏省电力有限公司泰州供电分公司 | Uninterrupted meter replacing device for electric power |
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2022
- 2022-08-19 CN CN202211000315.7A patent/CN115663655A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117856084A (en) * | 2024-03-08 | 2024-04-09 | 国网江苏省电力有限公司泰州供电分公司 | Uninterrupted meter replacing device for electric power |
| CN117856084B (en) * | 2024-03-08 | 2024-05-28 | 国网江苏省电力有限公司泰州供电分公司 | Uninterrupted meter replacing device for electric power |
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