CN117559234B - Inter-room signal transmission bus device of power distribution cabinet - Google Patents
Inter-room signal transmission bus device of power distribution cabinet Download PDFInfo
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- CN117559234B CN117559234B CN202410044582.7A CN202410044582A CN117559234B CN 117559234 B CN117559234 B CN 117559234B CN 202410044582 A CN202410044582 A CN 202410044582A CN 117559234 B CN117559234 B CN 117559234B
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- 230000001629 suppression Effects 0.000 claims description 36
- 230000002457 bidirectional effect Effects 0.000 claims description 35
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- 239000003381 stabilizer Substances 0.000 claims description 13
- 230000005669 field effect Effects 0.000 claims description 9
- KLLLJCACIRKBDT-UHFFFAOYSA-N 2-phenyl-1H-indole Chemical compound N1C2=CC=CC=C2C=C1C1=CC=CC=C1 KLLLJCACIRKBDT-UHFFFAOYSA-N 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
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- 238000010586 diagram Methods 0.000 description 12
- 101000645421 Homo sapiens Transmembrane protein 165 Proteins 0.000 description 4
- 102100025755 Transmembrane protein 165 Human genes 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000003750 conditioning effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 101100014500 Dictyostelium discoideum gdt2 gene Proteins 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
- H02B1/202—Cable lay-outs
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/24—Circuit arrangements for boards or switchyards
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
An inter-room signal transmission bus device of a power distribution cabinet. The invention aims to solve the problems of excessive transmission wires from a mechanism room to an instrument room, effective use space occupied by extrusion, messy cables, high construction and maintenance difficulty and the like in the prior art. The technical scheme includes that the device comprises a first signal transmission bus module in a mechanism room, a second signal transmission bus module in an instrument room and three transmission wires between the first signal transmission bus module and the second signal transmission bus module; the first signal transmission bus module comprises a first microcontroller unit, a first power supply circuit, an input unit, more than two input circuits, a first bus circuit and a power supply self-checking circuit which are correspondingly connected, wherein the input unit is provided with more than two signal input ports, and each input circuit is connected with one signal input port; the second signal transmission bus module comprises a second microcontroller unit, a second power supply circuit, an output device, more than two output circuits and a second bus circuit which are correspondingly connected, wherein the output device is provided with more than two signal output ports, and each output circuit is connected with one signal output port.
Description
Technical Field
The invention relates to an electric connection device on a power distribution cabinet for a power supply system, in particular to an inter-room signal transmission bus device of the power distribution cabinet.
Background
At present, a power distribution cabinet used by a commonly used power supply system is generally divided into three layers, wherein the upper layer of the power distribution cabinet is provided with a bus room and an instrument room which are separated, the middle layer is a mechanism room, and the lower layer is a cable room. Along with the higher and higher intelligent degree of switch board, the intelligent sensor quantity in the switch board is more and more, and especially there is a large amount of sensors and intelligent module's signal need to upload to the instrument room in the institutional advancement. The signal transmission between the power distribution cabinets used at present is carried by adopting independent signal transmission wires, so that a plurality of signal transmission wires are arranged between the mechanism room and the instrument room, the effective space between the mechanism room and the instrument room is occupied by the signal transmission wires too much, cables are messy, the difficulty of production construction and fault maintenance is high, induced voltage is caused because the signal transmission wires cannot be effectively isolated from the interference of peripheral circuits, and the data of each sensor and each intelligent module cannot be shared.
The utility model provides an alternating current low-voltage distribution cabinet with field bus monitoring function that chinese patent No. CN202872460U discloses provides a signal transmission device from the switch board to between the control room of distribution substation, and the structure includes box, isolator and circuit breaker, its characterized in that, it still includes the monitoring module that has the field bus technique, and this module comprises signal acquisition module and signal receiving module, signal acquisition module be located low-voltage distribution cabinet bottom of the case portion, by the following part constitution: the system comprises an environment variable acquisition system, an electric quantity acquisition system, a signal conditioning circuit, a microprocessor A, CAN bus controller A, CAN bus transmitter, wherein the signal receiving module is positioned in a control room and is composed of a CAN bus receiver, a CAN bus controller B, a microprocessor B, an address coding chip, a USB communication control chip and an upper computer; the signal acquisition module comprises an environment variable acquisition system and a power distribution cabinet running state acquisition system, and the environment variable acquisition system is responsible for acquiring environment variables such as temperature, humidity and the like of the power distribution cabinet; the power distribution cabinet running state acquisition system acquires electric signals on the power distribution cabinet site, including phase voltage, phase current, line voltage and line current, in real time through an AI intelligent instrument; the signal conditioning circuit has the functions that the environment variable obtained by the signal acquisition module is converted into a 0-5V standard voltage signal which can be accepted by an instrument through a three-phase alternating-current voltage transmitter and a three-phase alternating-current transmitter, and the 0-5V standard voltage signal is provided for the microprocessor A and the microprocessor B; the microprocessor converts analog signals obtained by the signal conditioning circuit into analog signals, and stores, analyzes and calculates the signals; the microprocessor transmits the processed data to the CAN bus controller A, the controller converts the data and transmits the data through the CAN bus transmitter, and the data is transmitted through the data buses CANL and CANH; in a control room, a CAN bus receiver rapidly receives data transmitted by a data bus CANL and a CANH, and converts the data through a CAN bus controller B, wherein one end of the CAN bus receiver is connected with a USB interface of a monitoring upper computer, and the other end of the CAN bus receiver is connected with a CAN bus network interface; the upper computer receives the field data through the USB interface and files all the data. The disadvantage of this solution is: the disclosed signal transmission bus device from the power distribution cabinet to the control room of the power distribution station is different from the application occasions and input and output objects, so that the structure of the signal transmission bus device is not suitable for being used as the inter-room signal transmission bus device of the power distribution cabinet; and the overall structure is complex, and each specific module has no disclosure of the structure, so that the implementation is difficult.
Disclosure of Invention
The invention aims to provide an improved inter-room signal transmission bus device of a power distribution cabinet, which can overcome the defects that the prior power distribution cabinet has a large number of signal transmission wires between a mechanism room and an instrument room, the signal transmission wires occupy too much space for the mechanism room and the instrument room, cables are messy, the production construction and the fault maintenance are difficult, induced voltage is caused because the signal transmission wires cannot be effectively isolated from the interference of peripheral circuits, the data of each sensor and an intelligent module are not shared and the like.
The technical scheme adopted for solving the technical problems is as follows: an inter-room signal transmission bus device of a power distribution cabinet is characterized in that: the system comprises a first signal transmission bus module arranged in a mechanism room of a power distribution cabinet, a second signal transmission bus module arranged in an instrument room of the power distribution cabinet and three transmission wires connected between the first signal transmission bus module and the second signal transmission bus module; the first signal transmission bus module comprises a first microcontroller unit, a first power supply circuit, an input device, more than two input circuits, a first bus circuit and a power supply self-checking circuit, wherein the output end of the first power supply circuit is respectively connected with the power supply ends of the first microcontroller unit, the more than two input circuits, the first bus circuit and the power supply self-checking circuit and the input power supply end of the input device, the output end of each input circuit, the input end of the first bus circuit and the output end of the power supply self-checking circuit are respectively connected with the corresponding I/O end of the first microcontroller unit, more than two signal input ports are arranged on the input device, and the input end of each input circuit is respectively connected with one signal input port on the input device; the second signal transmission bus module comprises a second microcontroller unit, a second power supply circuit, an outputter, more than two output circuits and a second bus circuit, wherein the output end of the second power supply circuit is respectively connected with the second microcontroller unit, more than two output circuits and the power supply end of the second bus circuit, the input end of each output circuit and the output end of each second bus circuit are respectively connected with the corresponding I/O end of the second microcontroller unit, more than two signal output ports are arranged on the outputter, and the output end of each output circuit is respectively connected with one signal output port on the outputter; the input end of the first power supply circuit, the input end of the second power supply circuit and the output power supply end of each output circuit are respectively connected with a direct current power supply output end, the input end of the power supply self-checking circuit is connected with the input end of the first power supply circuit, and the three transmission wires are connection wires between the signal transmission end of the first bus circuit and the signal transmission end of the second bus circuit; the first power supply circuit is characterized in that the other end of a diode six on the positive electrode of the input end of the first power supply circuit is connected with the power end of the power supply self-checking circuit and the input power end of the input device, the power supply self-checking circuit comprises a resistor twenty-four to a resistor twenty-seven, a bidirectional instantaneous suppression diode six to a bidirectional instantaneous suppression diode seven, a capacitor thirty-sixteen to a capacitor thirty-eight and a photoelectric coupler three, one end of the resistor twenty-four is connected with the other end of the diode six on the positive electrode of the input end of the first power supply circuit in one way, the other end of the resistor twenty-four is connected with one end of a parallel circuit of the capacitor thirty-eight and the bidirectional instantaneous suppression diode seven in the other way, the other end of the resistor twenty-four is connected with one end of the bidirectional instantaneous suppression diode six in the other way, the other end of the resistor twenty-five is connected with one end of the resistor thirty-six and one end of the capacitor thirty-sixteen is connected with the input positive electrode of the photoelectric coupler three, one end of the other end of the bidirectional transient suppression diode six is connected with the input negative electrode of the first power circuit, the other end of the resistor twenty-six is connected with the other end of the capacitor thirty-six and the input negative electrode of the photoelectric coupler three, one end of the output positive electrode of the photoelectric coupler three is connected with one end of the resistor twenty-seven, the other end of the resistor thirty-seven is connected with one I/O end of the first micro-controller unit, the other end of the output negative electrode of the photoelectric coupler three is connected with the other end of the capacitor thirty-seven and the other end of the capacitor thirty-seven is grounded, and the other end of the capacitor thirty-eight and the bidirectional transient suppression diode seven is connected with the input negative electrode of the first power circuit.
The first microcontroller unit in the technical scheme can be composed of a first microcontroller, a first crystal oscillator circuit, a first starting circuit and a first operation display circuit which are connected with the periphery of the first microcontroller; the second microcontroller unit can be composed of a second microcontroller, a second crystal oscillator circuit, a second starting circuit and a second operation display circuit which are connected with the periphery of the second microcontroller; the first microcontroller and the second microcontroller can be STM32 series or alternative series of microcontrollers, STM32 series of microcontrollers can be STM32F103CBT6 type, STM32F383VC type and other microcontrollers, and alternative series of microcontrollers can be HK32F103CBT6 type, CKS32F103CBT6 type and other microcontrollers.
The first bus circuit and the second bus circuit in the above technical scheme may adopt the same CAN bus circuit, or may adopt the same 485 bus circuit.
According to the technical scheme, the input end of the first power supply circuit and the input end of the second power supply circuit can be connected with the same direct-current power supply output end in an instrument room in parallel, so that the working complete synchronism of the first signal transmission bus module and the second signal transmission bus module is improved, and two connecting wires are added between the first signal transmission bus module and the second signal transmission bus module.
The first signal transmission bus module according to the above technical solution may further include a first program input circuit, where an output end of the first program input circuit is connected to two I/O ends on the first microcontroller unit, an input end of the first program input circuit is provided with a first program information input interface, and a power supply end of the first program input circuit is connected to an output end of the first power supply circuit; the second signal transmission bus module may further include a second program input circuit, an output end of the second program input circuit is connected to two I/O ends on the second microcontroller unit, an input end of the second program input circuit is provided with a second program information input interface, and a power supply of the second program input circuit is connected to an output end of the second power supply circuit.
The first signal transmission bus module in the above technical solution may further include a first program information printing circuit, an input end of the first program information printing circuit is connected to two I/O ends on the first microcontroller unit, and an output end of the first program information printing circuit is provided with a first printing device interface; the second signal transmission bus module may further include a second program information printing circuit, an input end of the second program information printing circuit is connected to two I/O ends on the second microcontroller unit, and an output end of the second program information printing circuit is provided with a second printing device interface.
The second signal transmission bus module according to the above technical solution may further include a high-power output device and more than one high-power output circuit, where the high-power output device is provided with more than one high-power signal output port, each input end of the high-power output circuit is respectively connected to one I/O end on the second microcontroller unit, each output end of the high-power output circuit is connected to one high-power signal output port on the high-power output device, each power end of the high-power output circuit is connected to an output end of the second power circuit, and an output power supply of the high-power output device is connected to the output end of the dc power supply.
The first bus circuit and the second bus circuit may adopt the same CAN bus circuit, the first bus circuit may include a resistor one to a resistor seven, a capacitor one to a capacitor three, an inductor one, a CAN isolation transceiver module one, a common mode inductor one, a diode one to a diode two, a bidirectional transient suppression diode one and a tripolar gas discharge tube one, wherein one end of the resistor one and one end of the resistor two are respectively connected with an I/O end special for CAN of the first microcontroller unit, the other end of the resistor one is connected with an RXD end of the CAN isolation transceiver module one, the other end of the resistor two is connected with a TXD end of the CAN isolation transceiver module one, one end of the GND end of the CAN isolation transceiver module one is connected with one end of the capacitor one and then grounded, the other end of the CAN isolation transceiver module one is connected with one end of the inductor one, the other end of the first inductor is connected with the output end of the first power circuit in one way, the other end of the first inductor is connected with the output end of the first power circuit in the other way, the other end of the third resistor is connected with the output end of the first power circuit, the first diode and the second diode are connected in different directions and then are connected in series with the two-way instant suppression diode to form an overvoltage protection circuit I, the CANH of the first CAN isolation transceiver module is connected with the input end I of the first common mode inductor, the corresponding output end of the first input end of the first common mode inductor is connected with one end of the first overvoltage protection circuit and then connected with one end of the fourth resistor, the other end of the fourth resistor is connected with one end of the first tripolar gas discharge tube and then connected with one end of the sixth resistor to form a signal transmission end I, the CANL of the first CAN isolation transceiver module is connected with the input end II of the first common mode inductor, the corresponding output end of the input end II of the common mode inductor I is connected with the other end of the overvoltage protection circuit I and then connected with one end of a resistor V, the other end of the resistor V is connected with the other end of the tripolar gas discharge tube I and then connected with the other end of a resistor VI and then becomes a signal transmission end II, the CANG of the CAN isolation transceiver module I is connected with one end of a parallel circuit of the resistor seven and the capacitor III, and the other end of the parallel circuit of the resistor seven and the capacitor III is connected with the ground end of the tripolar gas discharge tube I and then becomes a signal transmission end III; the second bus circuit may include a resistor eight to a resistor fourteen, a capacitor four to a capacitor six, an inductor two, a CAN isolation transceiver module two, a common mode inductor two, a diode three to a diode four, a bidirectional transient suppression diode two and a tripolar gas discharge tube two, wherein one end of the resistor eight and one end of the resistor nine are respectively connected with an I/O end special for CAN of the second microcontroller unit, the other end of the resistor eight is connected with an RXD end of the CAN isolation transceiver module two, the other end of the resistor nine is connected with a TXD end of the CAN isolation transceiver module two again, one end of the GND end of the CAN isolation transceiver module two is connected with one end of the capacitor three again and then grounded, the other end of the VCC end of the CAN isolation transceiver module two is connected with one end of the inductor two again, the other end of the second inductor is connected with the output end of the second power circuit, the other end of the third inductor is connected with the output end of the second power circuit, the other end of the resistor ten is connected with the output end of the second power circuit, the diode three and the diode four are connected in different directions and then are connected in series with the bidirectional instant suppression diode two to form an overvoltage protection circuit two, the CANH of the CAN isolation transceiver module two is connected with the input end I of the common mode inductor two, the corresponding output end of the input end I of the common mode inductor two is connected with one end of the overvoltage protection circuit two and then connected with one end of the resistor eleven, the other end of the resistor eleven is connected with one end of the tripolar gas discharge tube two and then becomes a signal transmission end four, the CANL of the CAN isolation transceiver module two is connected with the input end II of the common mode inductor two, the corresponding output end of the input end II of the common mode inductor II is connected with the other end of the overvoltage protection circuit II and then connected with one end of a resistor twelve, the other end of the resistor twelve is connected with the other end of the tripolar gas discharge tube II and then connected with the other end of a resistor thirteen and then becomes a signal transmission end V, the CANG of the CAN isolation transceiver module II is connected with one end of a parallel circuit of the resistor fourteen and a capacitor V, and the other end of the parallel circuit of the resistor fourteen and the capacitor V is connected with the ground end of the tripolar gas discharge tube II and then becomes a signal transmission end V; the first signal transmission end, the second signal transmission end and the third signal transmission end of the first bus circuit are correspondingly connected with the fourth signal transmission end, the fifth signal transmission end and the sixth signal transmission end of the second bus circuit respectively to form three connecting wires between the first signal transmission bus module and the second signal transmission bus module.
According to the technical scheme, the first bus circuit and the second bus circuit CAN adopt the same 485 bus circuit, the structures of the circuits are basically the same as those of the CAN bus circuit, and the difference is that the CAN isolation transceiver module I and the CAN isolation transceiver module II are changed into a 485 isolation transceiver module I and a 485 isolation transceiver module II, and the input end or the output end of the 485 isolation transceiver module I and the 485 isolation transceiver module II are respectively connected with the CAN special I/O ends of the first microcontroller unit and the second microcontroller unit and are changed into general I/O ends connected with the first microcontroller unit and the second microcontroller unit.
According to the technical scheme, the two or more input circuits can adopt the same circuit structure as each input circuit, and each path of signal to be transmitted in the mechanism room is connected with one I/O end of the first microcontroller unit through one signal input port on the input device by using one input circuit; the input circuit can comprise a resistor fifteen-a resistor eighteen, a bidirectional transient suppression diode three, a capacitor seven-a capacitor eight and a photoelectric coupler one, wherein a signal input port on the input device is connected with one end of the resistor fifteen, the signal input port is connected with the input end of the first power supply circuit, the other end of the resistor fifteen is connected with one end of the bidirectional transient suppression diode three and then is connected with one end of the resistor sixteen, the other end of the resistor sixteen is connected with one end of the capacitor seventeen and then is connected with the input positive electrode of the photoelectric coupler one, the other end of the bidirectional transient suppression diode three is connected with the other end of the capacitor seventeen and then is connected with the input negative electrode of the photoelectric coupler one, one output positive electrode of the photoelectric coupler one is connected with one end of the capacitor eighteen, the other end of the output positive electrode of the photoelectric coupler one is connected with one I/O end of the first microcontroller unit, the other end of the output negative electrode of the photoelectric coupler one is connected with the other end of the capacitor eight, and the other end of the resistor eighteen is connected with the output end of the first power supply circuit.
According to the technical scheme, the two or more output circuits can adopt the same circuit structure of each output circuit, each path of signal to be transmitted of the second microcontroller unit is connected with one output circuit through one I/O (input/output) of the second microcontroller unit, and then is connected with a signal receiving device of an instrument room through one signal output port of the output device; the output circuit can comprise a resistor nineteen, a resistor twenty, a photoelectric coupler II, a capacitor nine, a bidirectional transient suppression diode IV and a rectifier, wherein one end of the resistor nineteen is connected with one end of the output end of the second power supply circuit, the other end of the resistor twenty is connected with the input anode of the photoelectric coupler II, the other end of the resistor twenty is connected with the input cathode of the photoelectric coupler II, the output anode of the photoelectric coupler II is connected with one end of the capacitor nine and then connected with the input direct current anode of the rectifier, the output cathode of the photoelectric coupler II is connected with the other end of the capacitor nine and then connected with the input direct current cathode of the rectifier, the output end of the rectifier I is connected with the output end of the direct current power supply as an output power supply, and the output end of the rectifier II is connected with a signal output port on the output device.
According to the technical scheme, more than one high-power output circuit can adopt the same circuit structure of each high-power output circuit, one high-power output circuit can comprise a resistor twenty-first to twenty-third, a field effect tube, a diode five and a power relay, wherein one end of the resistor twenty-first is connected with one I/O end of the second micro-controller unit, the other end of the resistor twenty-first is connected with the grid electrode of the field effect tube, the other end of the resistor twenty-first is connected with the source electrode of the field effect tube and then grounded, one end of the resistor twenty-third is connected with the drain electrode of the field effect tube, the other end of the resistor twenty-third is connected with one end of the diode five and then connected with one end of the coil of the power relay, the other end of the coil of the power relay is connected with the other end of the diode five and then connected with the output end of the second power circuit, one end of the contact of the power relay is connected with the direct-current power output end through the high-power output device, and the other end of the contact of the power relay is connected with a high-power load through a high-power output port on the high-power output device.
The first power supply circuit may include a first fuse, a first variable resistor, a third inductor, a first voltage-input power supply with isolated wide voltage, a first voltage stabilizer, a tenth capacitor, a twenty-second capacitor, a five diode and a six diode, wherein an input positive electrode of the first power supply circuit is connected to one end of the first fuse, another end of the first fuse is connected to one end of the first variable resistor, another end of the first fuse is connected to one end of the tenth capacitor, another end of the eleventh capacitor is connected to one end of the third inductor, another end of the third inductor is connected to one end of the twelve capacitor, another end of the first power supply circuit is connected to an input positive electrode of the first voltage-input power supply with isolated wide voltage, another end of the first power supply circuit is connected to another end of the first variable resistor, another end of the first capacitor is connected to another end of the eleventh capacitor, another end of the second capacitor is connected to an input negative electrode of the first voltage-input power supply with isolated wide voltage, the output anode of the isolation wide voltage input power supply is connected with one end of a capacitor fourteen and then with one end of a capacitor fifteen and then with one end of a capacitor sixteen and then with the input end of a voltage stabilizer I, the output end of the voltage stabilizer I is connected with one end of a capacitor seventeen and then with one end of a capacitor nineteen and then with one end of a capacitor twenty-one and then with one end of a capacitor twenty-two, the output cathode of the isolation wide voltage input power supply I is connected with the other end of a capacitor fourteen and then with the other end of a capacitor fifteen and then with the other end of a capacitor sixteen and then with the ground end of the voltage stabilizer I and then with the other end of a capacitor seventeen and then with the other end of a capacitor nineteen and then with the other end of a capacitor twenty-one and then with the other end of a capacitor twenty-two, one end of a capacitor thirteen is connected with the input cathode of the isolation wide voltage input power supply I, one path of the other end of the capacitor thirteen is grounded, the other path of the capacitor is connected with an output cathode of an isolated wide voltage input power supply I, one path of the other end of the diode six is connected with an input anode of the first power supply circuit, the other path of the other end of the diode six is connected with one end of a bidirectional transient suppression diode five, the other end of the bidirectional transient suppression diode five is connected with the input cathode of the first power supply circuit, and the output anode of the isolated wide voltage input power supply I and the output end of the voltage stabilizer I respectively provide power for a first microcontroller unit, more than two input circuits, a first bus circuit and a power supply self-checking circuit; the second power supply circuit can comprise a second fuse, a second variable resistor, a fourth inductor, an isolated wide voltage input power supply, a second voltage stabilizer, twenty-three capacitors and thirty-five capacitors, wherein the input positive electrode of the second power supply circuit is connected with one end of the second fuse, the other end of the second fuse is connected with one end of the second variable resistor, one end of the twenty-three capacitors is connected with one end of the twenty-four capacitors, one end of the fourth inductor is connected with one end of the twenty-five capacitors, the other end of the fourth inductor is connected with the input positive electrode of the isolated wide voltage input power supply, the input negative electrode of the second power supply circuit is connected with the other end of the second variable resistor, the other end of the twenty-three capacitors is connected with the other end of the twenty-four capacitors, the other end of the twenty-four capacitors is connected with the input negative electrode of the isolated wide voltage input power supply, the output anode of the isolation wide voltage input power supply II is connected with one end of a capacitor twenty-seven, one end of the capacitor twenty-eight, one end of the capacitor twenty-nine, one end of the voltage stabilizer II is connected with the input end of the voltage stabilizer II, one end of the capacitor thirty-one, one end of the capacitor thirty-three, one end of the capacitor thirty-four, one end of the capacitor thirty-five, the output cathode of the isolation wide voltage input power supply II is connected with the other end of the capacitor twenty-seven, the other end of the capacitor twenty-eight, the other end of the capacitor twenty-nine, the ground end of the voltage stabilizer II, the other end of the capacitor thirty-one, the other end of the capacitor thirty-three, the other end of the capacitor thirty-four, one end of the capacitor twenty-six, the input cathode of the isolation wide voltage input power supply II, the other path of the other end of the capacitor twenty-six is grounded, the other path of the capacitor twenty-six is connected with the output cathode of the isolation wide voltage input power supply II, the output anode of the isolation wide voltage input power supply II and the output end of the voltage stabilizer II respectively provide power for the second micro-controller unit, more than two output circuits, the second bus circuit and the high-power output circuit, and the input anode and the input cathode of the first power circuit and the second power circuit are respectively connected with the anode and the cathode of the output end of the direct-current power supply.
The beneficial effects of the invention are as follows: the intelligent power distribution cabinet comprises a first signal transmission bus module with a specific structure, a second signal transmission bus module with a specific structure, and three transmission wires, wherein the first signal transmission bus module is arranged in a mechanism room of the power distribution cabinet, the second signal transmission bus module is arranged in an instrument room of the power distribution cabinet, the three transmission wires are connected between the first signal transmission bus module and the second signal transmission bus module, the first signal transmission bus module is formed by correspondingly connecting a first microcontroller unit, a first power supply circuit, an input device, more than two input circuits, a first bus circuit and a power self-checking circuit, the second signal transmission bus module is formed by correspondingly connecting a second microcontroller unit, a second power supply circuit, an output device, more than two output circuits and a second bus circuit, so that infinite multi-channel signal transmission between the mechanism room and the instrument room of the intelligent power distribution cabinet can be solved by only using the three transmission wires, and the existing technical problems that a plurality of signal wires are required to be arranged between the mechanism room and the instrument room of the intelligent power distribution cabinet, the mechanism room is excessively occupied by the effective use space, the wire is disordered, the production construction difficulty, the fault overhaul difficulty is high and the like are avoided. And the second is that three connecting wires are adopted between the output end of the first bus circuit and the input end of the second bus circuit, one of the connecting wires can be used as the grounding wire of the metal shielding layer of the other two signal transmission wires, so that the problems in the prior art that the induction voltage is generated due to the interference of peripheral circuits on the two signal transmission wires and the signal transmission quality is reduced are avoided. The first signal transmission bus module is provided with a power supply self-checking circuit, when the input end of the first power supply circuit is powered down due to sudden power failure of the output end of an external direct current power supply, the first microcontroller unit can be immediately informed to lock data transmission, and the situation that the power grid control is in error due to the fact that the sudden power failure can be transmitted out as an error signal is effectively avoided. And the unlimited multi-channel signal transmission in the mechanism room or the instrument room of the intelligent power distribution cabinet is processed through the same microcontroller unit, so that the data sharing of the multi-channel signal transmission can be realized, and the problem in the prior art that the data of a plurality of functional modules of the inter-room signal transmission bus device cannot be shared is solved. And the second signal transmission bus module is provided with an output device and more than two output circuits, and the output end of each output circuit is respectively connected with one signal output port on the output device, so that the connection of the signal devices to be transmitted in the mechanism room and the connection of the signal devices to be received in the instrument room are very convenient, and the use is obvious. And the input end of the first power supply circuit and the input end of the second power supply circuit can be connected in parallel with the same direct-current power supply output end of an instrument room of the power distribution cabinet, and the working of the first signal transmission bus module and the second signal transmission bus module can be effectively ensured to be completely synchronous through the identity of power supplies, so that the signal false alarm fault between the first signal transmission bus module and the second signal transmission bus module caused by the difference of speed of signal transmission of the two circuits is avoided. And seventhly, bus transmission is adopted between a mechanism room and an instrument room of the intelligent power distribution cabinet to realize infinite multipath signal transmission.
The invention is further described below with reference to the drawings and examples.
Drawings
FIG. 1 is a block schematic diagram of one embodiment of the present invention.
Fig. 2 is a block schematic diagram of the first and second microcontroller units of fig. 1.
Fig. 3 is a schematic diagram of the circuit principle of fig. 1, in which more than two input circuits are shown only one, and more than two output circuits are also shown only one.
Fig. 4 is an enlarged schematic diagram of the first microcontroller unit of fig. 3, wherein the first microcontroller unit only shows a portion of the functional terminals (pins).
Fig. 5 is an enlarged schematic diagram of the second microcontroller unit of fig. 3, wherein the second microcontroller unit only shows a portion of the functional terminals (pins).
Fig. 6 is an enlarged schematic diagram of the first program input circuit and the second program input circuit in fig. 3.
Fig. 7 is an enlarged schematic diagram of the first program information printing circuit and the second program information printing circuit in fig. 3.
Fig. 8 is an enlarged schematic diagram of the high power output circuit of fig. 3.
Fig. 9 is an enlarged schematic diagram of the first bus circuit and the second bus circuit in fig. 3.
Fig. 10 is an enlarged schematic diagram of the input circuit and the output circuit in fig. 3.
Fig. 11 is an enlarged schematic diagram of the first power supply circuit and the second power supply circuit in fig. 3.
Fig. 12 is an enlarged schematic diagram of the power self-test circuit of fig. 3.
In the figure: 1. a first microcontroller unit; 2. a first power supply circuit; 3. an input device; 4. an input circuit; 5. a first bus circuit; 6. a power supply self-checking circuit; 7. a signal input port; 8. a second microcontroller unit; 9. a second power supply circuit; 10. an output device; 11. an output circuit; 12. a second bus circuit; 13. a signal output port; 14. a DC power supply output end; 15. three transmission wires; 16. two connecting wires are added; 17. a first microcontroller; 18. a first crystal oscillator circuit; 19. a first start-up circuit; 20. a first operation display circuit; 21. a second microcontroller; 22. a second crystal oscillator circuit; 23. a second start-up circuit; 24. a second operation display circuit; 25. a first program input circuit; 26. a first program information printing circuit; 27. a second program input circuit; 28. a second program information printing circuit; 29. a high power output; 30. a high power output circuit; 31. high power signal output port.
Detailed Description
Referring to fig. 1, the inter-room signal transmission bus device of the power distribution cabinet is characterized in that: the system comprises a first signal transmission bus module arranged in a mechanism room of a power distribution cabinet, a second signal transmission bus module arranged in an instrument room of the power distribution cabinet and three transmission wires connected between the first signal transmission bus module and the second signal transmission bus module; the first signal transmission bus module comprises a first microcontroller unit, a first power supply circuit, an input device, more than two input circuits, a first bus circuit and a power supply self-checking circuit, wherein the output end of the first power supply circuit is respectively connected with the power supply ends of the first microcontroller unit, the more than two input circuits, the first bus circuit and the power supply self-checking circuit and the input power supply end of the input device, the output end of each input circuit, the input end of the first bus circuit and the output end of the power supply self-checking circuit are respectively connected with the corresponding I/O end of the first microcontroller unit, more than two signal input ports are arranged on the input device, and the input end of each input circuit is respectively connected with one signal input port on the input device; the second signal transmission bus module comprises a second microcontroller unit, a second power supply circuit, an output device, more than two output circuits and a second bus circuit, wherein the output end of the second power supply circuit is respectively connected with the second microcontroller unit, the more than two output circuits and the power supply end of the second bus circuit, the input end of each output circuit and the output end of each second bus circuit are respectively connected with the corresponding I/O end of the second microcontroller unit, the output device is provided with more than two signal output ports, and the output end of each output circuit is respectively connected with one signal output port on the output device; the input end of the first power supply circuit, the input end of the second power supply circuit and the output power supply end of each output circuit are respectively connected with the output end of the direct current power supply, the input end of the power supply self-checking circuit is connected with the input end of the first power supply circuit, and the three transmission wires are connecting wires between the signal transmission end of the first bus circuit and the signal transmission end of the second bus circuit.
In addition, the first signal transmission bus module comprises a first program input circuit, wherein the output end of the first program input circuit is connected with a corresponding I/O end on the first microcontroller unit, the input end of the first program input circuit is provided with a first program input interface, and the power supply of the first program input circuit is connected with the output end of the first power supply circuit; the second signal transmission bus module comprises a second program input circuit, the output end of the second program input circuit is connected with a corresponding I/O end on the second microcontroller unit, the input end of the second program input circuit is provided with a second program input interface, and the power supply of the second program input circuit is connected with the output end of the second power supply circuit.
The first signal transmission bus module comprises a first program information printing circuit, the input end of the first program information printing circuit is connected with a corresponding I/O end on the first microcontroller unit, and the output end of the first program information printing circuit is provided with a first printing equipment interface; the second signal transmission bus module comprises a second program information printing circuit, the input end of the second program information printing circuit is connected with the corresponding I/O end on the second microcontroller unit, and the output end of the second program information printing circuit is provided with a second printing equipment interface.
The second signal transmission bus module comprises a high-power output device and more than one high-power output circuit and is used for providing control signals for high-power loads; the high-power output device is provided with more than one high-power signal output port, the input end of each high-power output circuit is respectively connected with the corresponding I/O end of the second microcontroller unit, the output end of each high-power output circuit is respectively connected with one high-power signal output port of the high-power output device, the power supply of the high-power output circuit is connected with the output end of the second power supply circuit, and the output power supply of the high-power output device is connected with the output end of the direct-current power supply.
Referring to fig. 2, the first microcontroller unit is composed of a first microcontroller and a first crystal oscillator circuit, a first starting circuit and a first operation display circuit which are connected with the periphery of the first microcontroller; the second microcontroller unit is composed of a second microcontroller, a second crystal oscillator circuit, a second starting circuit and a second operation display circuit which are connected with the periphery of the second microcontroller.
Referring to fig. 3 to 5, 11 and 12, a circuit structure of an inter-room signal transmission bus device of the power distribution cabinet of fig. 1 includes a first signal transmission bus module disposed in a mechanism room of the power distribution cabinet, a second signal transmission bus module disposed in an instrument room of the power distribution cabinet, and three transmission wires connected between the first signal transmission bus module and the second signal transmission bus module; the first signal transmission bus module comprises a STM32F103CBT6 type first microcontroller unit 1, a first power supply circuit 2, an input device 3, more than two input circuits 4, a first bus circuit 5 and a power supply self-checking circuit 6, wherein the output ends of the first power supply circuit 2 are respectively connected with the power supply ends 9, 24, 36 and 48 pins of the first microcontroller unit 1, the power supply ends of the first bus circuit 5 and the power supply self-checking circuit 6 and the input power supply ends of the input device 3, the output ends of the input circuit 4 are connected with the first pin 10 of the I/O end of the first microcontroller unit 1, the input ends of the first bus circuit 5 are respectively connected with the second pin 32 and the first pin 33 of the I/O end of the first microcontroller unit 1, the output ends of the power supply self-checking circuit 6 are respectively connected with the first pin 19 of the I/O end of the first microcontroller unit 1, more than two signal input ports 7 are arranged on the input device 3, and the input ends of each input circuit 4 are respectively connected with the input device 7 of the input device 3; the second signal transmission bus module comprises an STM32F103CBT6 type second microcontroller unit 8, a second power supply circuit 9, an output device 10, more than two output circuits 11 and a second bus circuit 12, wherein the output ends of the second power supply circuit 9 are respectively connected with the power supply ends 9, 24, 36 and 48 pins of the second microcontroller unit 8, more than two output circuits 11 and the power supply ends of the second bus circuit 12, the input end of the output circuit 11 is connected with one I/O end 10 pin of the second microcontroller unit 8, the output end of the second bus circuit 12 is respectively connected with the two I/O end 32 pins and the 33 pins of the second microcontroller unit 8, more than two signal output ports 13 are arranged on the output device 10, and the output ends of each output circuit 11 are respectively connected with one signal output port 13 on the output device 10; the input end of the first power supply circuit 2, the input end of the second power supply circuit 9 and the output power supply ends of the output circuits 11 are respectively connected with a direct current power supply output end 14, the input end of the power supply self-checking circuit 6 is connected with the input end of the first power supply circuit 2, and the three transmission wires 15 are connecting wires between the signal transmission ends of the first bus circuit 5 and the signal transmission ends of the second bus circuit 12; the first power supply circuit 2 is characterized in that the other end of a diode D8 on the positive electrode + of the input end of the first power supply circuit 1 is connected with the power end of the power supply self-checking circuit 6 and the input power end of the input device 3, the power supply self-checking circuit 6 comprises resistors R36-R39, bidirectional transient suppression diodes TVS 6-TVS 7, capacitors C42-C44 and a photoelectric coupler OC3, one end of R36 is connected with the other end of the diode D8 on the positive electrode + of the input end of the first power supply circuit 2, the other end of R36 is connected with one end of a parallel circuit of C44 and TVS7, the other end of R36 is connected with one end of R37 and the other end is connected with one end of TVS6, the other end of R37 is connected with R38 and C42 and then with OC3, the other end of TVS6 is connected with the negative electrode of the input end of the first power circuit 2, the other end of TVS6 is connected with the other end of R38 and then with C42 and then with the negative electrode of OC3, the positive electrode of OC3 is connected with R39 and the other end of C34 and then with the 19 th pin of the I/O end of the first microcontroller 17, the negative electrode of OC3 is connected with C43 and the other end of C43 and then falls to the ground, the other end of R39 is connected with the output end VCC of the first power circuit 2, and the other end of the parallel circuit of C44 and TVS7 is connected with the negative electrode of the input end of the first power circuit 2.
In addition, the input end of the first power supply circuit 2 and the input end of the second power supply circuit 9 are connected in parallel to the same dc power supply output end 14 in the meter room, so as to improve the complete synchronism of the operation of the first signal transmission bus module and the second signal transmission bus module, thus two connecting wires 16 need to be added between the input end of the first power supply circuit 2 and the second power supply circuit 9.
The first microcontroller unit 1 is composed of a STM32F103CBT6 type first microcontroller 17, a first crystal oscillator circuit 18, a first starting circuit 19 and a first operation display circuit 20 which are connected with the periphery of the first microcontroller 17, wherein pins 10-22, pins 25-34, pins 37-43 and pins 45-46 of the first microcontroller 17 are I/O ends, and the output end of each input circuit 4 is respectively connected with one I/O pin; the first crystal oscillator circuit 18 is composed of a resistor R1, a crystal oscillator B1 and capacitors C1-C2, wherein the 5 th pin of the external clock end of the first microcontroller 17 is connected with one end of the R1 and then connected with one end of the B1 and then connected with one end of the C1, the 6 th pin of the external clock end of the first microcontroller 17 is connected with the other end of the R1 and then connected with the other end of the B1 and then connected with one end of the C2, and the other ends of the C1 and the C2 are connected with the ground; the first starting circuit 19 is composed of a resistor R2 and a capacitor C3, wherein one end of the R2 is connected with the output end VCC of the first power supply circuit 2, one path of the other end of the R2 is connected with the 7 th pin of the asynchronous reset end of the first microcontroller 17, the other path of the other end of the R2 is connected with one end of the C3, and the other end of the C3 is grounded; the first operation display circuit 20 is composed of a resistor R3 and a light emitting diode D1, wherein one end of R3 is connected to a pin 39 of one I/O terminal of the first microcontroller 17, the other end of R3 is connected to one end of D1, and the other end of D1 is connected to the output terminal VCC of the first power supply circuit 2.
The second micro-controller unit 8 is composed of a STM32F103CBT6 type second micro-controller 21 and a second crystal oscillator circuit 22, a second starting circuit 23 and a second operation display circuit 24 which are connected with the periphery of the second micro-controller 21, wherein pins 10-22, pins 25-34, pins 37-43 and pins 45-46 of the second micro-controller 21 are all I/O ends, and the input end of each output circuit 11 is respectively connected with one I/O pin; the second crystal oscillator circuit 22 is composed of a resistor R4, a crystal oscillator B2 and capacitors C4-C5, wherein the 5 th pin of the external clock end of the second microcontroller 21 is connected with one end of the R4 and then connected with one end of the B2 and then connected with one end of the C4, the 6 th pin of the external clock end of the second microcontroller 21 is connected with the other end of the R4 and then connected with the other end of the B2 and then connected with one end of the C5, and the other ends of the C4 and the C5 are connected with the ground end in a grounding way; the second starting circuit 23 is composed of a resistor R5 and a capacitor C6, wherein one end of the R5 is connected with the output end VCC of the second power supply circuit 9, one path of the other end of the R5 is connected with the 7 th pin of the asynchronous reset end of the second microcontroller 21, the other path of the other end of the R5 is connected with one end of the C6, and the other end of the C6 is grounded; the second operation display circuit 24 is composed of a resistor R6 and a light emitting diode D2, wherein one end of R6 is connected to a pin 39 of one I/O terminal of the second microcontroller 21, the other end of R6 is connected to one end of D2, and the other end of D2 is connected to the output terminal VCC of the second power supply circuit 9.
Referring to fig. 6, 7 and 3, the first signal transmission bus module further includes a first program input circuit 25 and a first program information printing circuit 26, and the second signal transmission bus module further includes a second program input circuit 27 and a second program information printing circuit 28; the first program input circuit 25 is composed of resistors R7-R8 and a first program input interface X1, one end of R7 is connected with an output end VCC of the first power supply circuit 2, one end of R7 is connected with an I/O terminal 37 pin of the first microcontroller 17, the other end is connected with an input 2 end of the first program input interface X1, one end of R8 is grounded, the other end of R8 is connected with an I/O terminal 34 pin of the first microcontroller 17, and the other end is connected with an input 3 end of the first program input interface X1; the second program input circuit 27 is composed of resistors R9-R10 and a second program input interface X2, wherein one end of R9 is connected with an output end VCC of the second power supply circuit 9, the other end of R9 is connected with an I/O end 37 of the second microcontroller 21, the other end of R9 is connected with an output 2 end of the second program input interface X2, one end of R10 is grounded, and the other end of R10 is connected with an I/O end 34 of the second microcontroller 21, and the other end of R10 is connected with an output 3 end of the second program input interface X2; the first program information printing circuit 26 is formed by a first printing device interface X3, wherein the output 2 of the first printing device interface X3 is connected with the pin 21 of the I/O terminal of the first microcontroller 17, and the output 3 of the first printing device interface X3 is connected with the pin 22 of the I/O terminal of the first microcontroller 17; the second program information printing circuit 28 is formed by a second printing device interface X4, the output 2 of the second printing device interface X4 is connected to the I/O terminal 21 pin of the second microcontroller 21, and the output 3 of the second printing device interface X4 is connected to the I/O terminal 22 pin of the second microcontroller 21.
Referring to fig. 8 and 3, the second signal transmission bus module further includes a high-power output 29 and more than one high-power output circuit 30, which is specially configured to provide a control signal for a high-power load, where the high-power output 29 is provided with more than one high-power signal output port 31, each high-power load interface 31 may be connected to a high-power load, an input end of each high-power output circuit 30 is connected to a pin 42 of an I/O terminal on the second microcontroller unit 8, an output end of each high-power output circuit 30 is connected to a high-power signal output port 31 on the high-power output 29, a power end of each high-power output circuit 30 is connected to a dc 5V output end of the second power supply circuit 9, and an output power end of the high-power output circuit 29 is connected to the dc power output end 14; one of the high-power output circuits 30 includes resistors R11 to R13, a field effect transistor VT, a diode D3, and a power relay J, where one end of R12 is connected to one of the I/O terminals 42 of the second microcontroller 21 and the other end is connected to one end of R13, the other end of R12 is connected to the gate of VT, the other end of R13 is connected to the source of VT and then to ground, one end of R11 is connected to the drain of VT, the other end of R11 is connected to one end of D3 and then to one end of a coil of J, the other end of the coil of J is connected to the other end of D3 and then to the dc 5V output terminal of the second power circuit 9, one end of a contact of J is connected to the dc power output terminal 14 through the high-power output 29, and the other end of a contact of J is connected to a high-power signal output port 31 on the high-power output 29.
Referring to fig. 9 and 3, the first bus circuit 5 and the second bus circuit 12 adopt the same CAN bus circuit structure, the first bus circuit 5 includes resistors R14 to R20, capacitors C7 to C9, an inductor L1, a CAN isolation transceiver module IC1, a common mode inductor GL1, diodes D4 to D5, a bidirectional transient suppression diode TVS1 and a triode gas discharge tube GDT1, wherein one ends of R14 and R15 are respectively connected to the 33 rd pin and the 32 th pin of two CAN dedicated I/O terminals of the first microcontroller 17, the other end of R14 is connected to the RXD terminal of IC1, the other end of R15 is connected to one end of R16 and then to the TXD terminal of IC1, one end of GND terminal C8 of IC1 is connected to one end of C7 and then to ground, the other end of VCC terminal C8 of IC1 is connected to one end of C1, the other end of L1 is connected to the other end of C7 and the other end is connected to the output VCC of the first power supply circuit 2, the other end of R16 is connected with the output end VCC of the first power supply circuit 2, C7 and C8 are connected in series with TVS1 after being connected in different directions to form an overvoltage protection circuit I, CANH of IC1 is connected with a first input end of GL1, one end of the overvoltage protection circuit I is connected with one end of R17 again, one end of the other end of R17 is connected with one end of GDT1 again and then becomes a signal transmission end a, CANL of IC1 is connected with a second input end of GL1, the other end of the second input end is connected with one end of R18 again and then becomes a signal transmission end b, the other end of R18 is connected with the other end of GDT1 again and then becomes a signal transmission end b, CANG of IC1 is connected with one end of a parallel circuit of R20 and C9, and the other end of the parallel circuit of R20 and C9 is connected with the ground end of GDT1 and then becomes a signal transmission end C; the second bus circuit 12 includes resistors R21 to R27, capacitors C10 to C12, an inductor L2, a CAN isolation transceiver module IC2, a common mode inductor GL2, diodes D6 to D7, a bidirectional transient suppression diode TVS2, and a tripolar gas discharge tube GDT2, wherein one end of each of R21 and R22 is respectively connected to the first pins 33 and 32 pins of two CAN dedicated I/O terminals of the second microcontroller 21, the other end of R21 is connected to the RXD terminal of IC2, the other end of R22 is connected to the TXD terminal of IC2 again, one end of GND terminal of R23 is connected to one end of C10 and then to ground, the other end of VCC terminal of C11 is connected to one end of L2 again, the other end of L2 is connected to the other end of C10 and then to the output terminal of the second power circuit 9, the other end of R23 is connected to the output terminal VCC of the second power circuit 9, D6 and D7 are respectively connected to the output terminal VCC of the second power circuit 9, the other end of D2 is connected to the output terminal of TVS2 in different directions, the other end of R21 is connected to the RXD terminal of IC2, the other end of R22 is connected to the TXD terminal of IC2, the other end of GND terminal of C2 is connected to the other end of C10 and then to the other end of GL2 is connected to the output terminal of GL 25, and then to the other end of GL2 is connected to the output terminal of the GDT2, and the other end of the output 2 is connected to the output end of the GDT 2; the signal transmission ends a, b, c of the first bus circuit 5 are respectively connected with the signal transmission ends a ', b ', c ' of the second bus circuit 12 correspondingly to form three transmission wires 15 between the first signal transmission bus module and the second signal transmission bus module; among the three transmission wires 15, the a-a 'connection wire and the b-b' connection wire are signal transmission wires, the c-c 'connection wire is a connection wire with the metal shielding layer of the a-a' and the b-b 'signal transmission wires grounded, and the c-c' connection wire solves the prior art problems that the two signal transmission wires a-a 'and b-b' are interfered by peripheral circuits to generate induced voltage, and the signal transmission quality is reduced.
Referring to fig. 10 and fig. 3, the two or more input circuits 4 have the same circuit structure, and each signal to be transmitted in the mechanism room passes through a signal output port 7 on the input unit 3, and then is connected with an I/O terminal of the first microcontroller 17 by using one input circuit 4; one input circuit 4 comprises resistors R28-R31, a bidirectional transient suppression diode TVS3, capacitors C13-C14 and a photoelectric coupler OC1, wherein one end of R28 is connected with one signal input port 7 of the input device 3, the signal input port 7 is connected with the input end of the first power supply circuit 2, the other end of R28 is connected with one end of TVS3 in one way and the other end of R29 is connected with one end of R30 and one end of C13 and then connected with the input anode of OC1, the other end of TVS3 is connected with the other end of C30 and then connected with the input cathode of OC1, one way of the output anode of OC1 is connected with one I/O end of the first microcontroller 17, the other way of the output cathode of OC1 is connected with one end of C14, the other way of the output cathode of OC1 is grounded, and the other way of R31 is connected with the output end VCC of the first power supply circuit 2.
The two or more output circuits 11 adopt the same circuit structure of each output circuit, each path of signal to be transmitted of the second microcontroller 21 is connected with one output circuit 11 through one I/O terminal thereof, and then is connected with a signal receiving device in an instrument room through one signal output port 13 on the output device 10; one output circuit 11 comprises resistors R32-R33, a photoelectric coupler OC2, a capacitor C15, and bidirectional transient suppression diodes TVS4 and MB 6F-type bridge stack IC3, wherein one output end VCC of the second power supply circuit 9 is connected to one end of R32 and the other end of R33, one I/O end 10 of the second microcontroller 21 is connected to the other end of R33 and then to the input cathode of OC2, the other end of R32 is connected to the input anode of OC2, one end of the output anode of OC2 is connected to one end of TVS4 and then to the input dc anode of IC3, the other end of OC2 is connected to the other end of TVS 15 and then to the input dc anode of IC3, one output end of IC3 is connected to the positive electrode of the dc power supply output end 14 as an output power supply, and the other output end of IC3 is connected to the signal output port 13 of the output device 10.
Referring to fig. 11 and 3, the first power supply circuit 2 includes a fuse QA1, a variable resistor R34, an inductor L3, capacitors C16-C28, a WRB4850S-1WR2 type isolation wide voltage input power supply IC4, an AMS1117-3.3 type voltage stabilizer IC5, a bidirectional transient suppression diode TVS5, and a diode D8, wherein an input positive electrode +of the first power supply circuit 2 is connected to one end of QA1, another end R34 of QA1 is connected to one end of C16 and one end of C17 and one end of L3, another end of L3 is connected to one end of C18 and one end of C4 and is connected to an input positive electrode vi+ of IC4, an input negative electrode-connected to the other end of R34 and connected to the other end of C16 and connected to the other end of C18 and connected to the input negative electrode Vi of IC4, an output positive electrode Vo + of IC4 is connected to one end of C20 and one end of C21 and connected to one end of C22 and connected to the input end Vin of IC5, the output end Vout of IC5 is connected with C23 end and C24 end and C25 end and C26 end and C27 end and C28 end, the output negative electrode Vo-of IC4 is connected with C20 end and C21 end and C22 end and C5 ground end GND and C23 end and C24 end and C25 end and C26 end and C27 end and C28 end, one end of C19 is connected with input negative electrode Vi-of IC4, another end of C19 is grounded, another end is connected with output negative electrode Vo-of IC4, one end of D8 is connected with input positive electrode of first power circuit 2, another end of D8 is connected with one end of input power supply end 7 of signal input port 7 of input device 3 and another end of TVS5, another end of TVS5 is connected with input negative electrode-of first power circuit 2, said first power circuit 2 is respectively the input negative electrode of first microcontroller unit 1, more than two input circuits 4, first bus 5, the power supply self-checking circuit 6 and the first program input circuit 25 supply the power supply VCC; the second power supply circuit 9 comprises a fuse QA2, a variable resistor R35, an inductor L4, capacitors C29-C41 and WRB4850S-1WR2 type isolation wide voltage input power supply IC6 and an AMS1117-3.3 type voltage stabilizer IC7, wherein the positive electrode of the input end of the second power supply circuit 9 is connected with one end QA2, the other end of the QA2 is connected with one end R35 and then one end C29 and then one end C30 and then one end L4, the other end of the L4 is connected with one end C31 and then one end of the input positive electrode Vi+ of the IC6, the negative electrode of the input end of the second power supply circuit 9 is connected with the other end of the R35 and then the other end of the C29 and then the other end of the input negative electrode Vi-of the IC6, one end of the output positive electrode vo+ of the IC6 is connected with one end C33 and then one end of the C35 and then the input end Vin of the IC7, the output end Vout of the IC7 is connected with one end of C36, one end of C37, one end of C38, one end of C39, one end of C40, one end of C41, the output cathode Vo-of the IC6 is connected with the other end of C33, the other end of C34, the other end of C35, the ground end GND of the IC7, the other end of C36, the other end of C37, the other end of C38, the other end of C39, the other end of C40, the other end of C32, one way, the other way, is grounded, the output cathode Vo-of the IC6 is connected with the other way, and the second power circuit 9 respectively provides power VCC and direct current 5V for the second micro controller unit 8, the two or more output circuits 11, the second bus circuit 12, the second program input circuit 27 and the high-power output circuit 30; the positive electrode + and the negative electrode of the input end of the first power supply circuit 2 and the positive electrode + and the negative electrode of the input end of the second power supply circuit 9 respectively correspond to and are connected in parallel with the positive electrode + and the negative electrode of the same dc power supply output end 14, and two connecting wires 16 are added between the first signal transmission bus module and the second signal transmission bus module.
When the first microcontroller unit 1 and the second microcontroller unit 8 are in an operating state, operating programs are respectively input to the first microcontroller 17 and the second microcontroller 21 through the first program input circuit 25 and the second program input circuit 27, and program contents input into the first microcontroller 17 and the second microcontroller 21 can be printed through the first program information printing circuit 26 and the second program information printing circuit 28 so as to identify whether programs input into the first microcontroller 17 and the second microcontroller 21 are correct; the method comprises the steps that a first signal transmission bus module is arranged in a mechanism room, a second signal transmission bus module is arranged in an instrument room, signal transmission ends a, b and c on a first bus circuit 5 of the first signal transmission bus module are correspondingly connected with signal transmission ends a ', b ' and c ' on a second bus circuit 12 of the second signal transmission bus module respectively to form three transmission wires 15 between the first signal transmission bus module and the second signal transmission bus module, an input end positive electrode+ and an input end negative electrode on a first power circuit 2 of the first signal transmission bus module and an input end positive electrode and an input end negative electrode on a second power circuit 9 of the second signal transmission bus module respectively correspond to and are connected with a positive electrode+ and a negative electrode of the same direct current power output end 14 in the instrument room in parallel, and two connection wires 16 are added between the first signal transmission bus module and the second signal transmission bus module; under the condition that the first signal transmission bus module and the second signal transmission bus module are in working states, one path of signals to be transmitted in the mechanism room is connected to one signal input port 7 of the input device 3, and is connected with an unused I/O terminal 10 pin on the first microcontroller 17 through one input circuit 4 connected with the signal input port 7, one path of signal receiving device in the instrument room is connected to one signal output port 13 of the output device 10, and is connected with an I/O terminal 10 pin with the same number on the second microcontroller 21 through one output circuit 11 connected with the signal output port 13, and one path of signals can be transmitted from the mechanism room to the instrument room; according to the arrangement, as long as there are a plurality of pairs of unused I/O terminals on the first microcontroller 17 and the second microcontroller 21, a plurality of signals can be transmitted from the mechanism room to the meter room, and only five connecting wires are needed between the mechanism room and the meter room, if the input terminal on the first power supply circuit 2 and the input terminal on the second power supply circuit 9 are not connected to the same dc power supply output terminal 14 in parallel, but are respectively connected to corresponding dc power supply output terminals, only three connecting wires are needed between the mechanism room and the meter room.
As shown in fig. 12, when the external dc power supply output end 14 is suddenly powered off, the OC3 of the power self-checking circuit 6 is turned off, the output end VCC of the first power supply circuit inputs a signal of 1 to the 19 th pin of the first microcontroller 17 through R39, and the first microcontroller 17 starts its locking data transmission function, so as to avoid the power grid control error caused by the external sudden power off as an error signal transmission; when the external direct current power supply output end 14 is recovered to have electricity, the OC3 of the power supply self-checking circuit 6 is conducted, the output end VCC of the first power supply circuit falls to the ground through R39 and OC3, at this time, the 19 th pin of the first microcontroller 17 is a signal of 0, the first microcontroller 17 is unlocked, and the data transmission is recovered to be normal; when the direct current power supply output end 14 is suddenly powered off, the capacitor C44 discharges instantly, so that the power failure of the power supply self-checking circuit 6 and the input device 3 is delayed, and the first power supply circuit 2 is powered off in advance through the unidirectional property of the D8 of the first power supply circuit 2, so that the first microcontroller 17 is controlled to be powered off in advance, and the external sudden power failure is prevented from being an error signal input into the first microcontroller 17.
Claims (9)
1. An inter-room signal transmission bus device of a power distribution cabinet is characterized in that: the system comprises a first signal transmission bus module arranged in a mechanism room of a power distribution cabinet, a second signal transmission bus module arranged in an instrument room of the power distribution cabinet and three transmission wires connected between the first signal transmission bus module and the second signal transmission bus module; the first signal transmission bus module comprises a first microcontroller unit, a first power supply circuit, an input device, more than two input circuits, a first bus circuit and a power supply self-checking circuit, wherein the output end of the first power supply circuit is respectively connected with the power supply ends of the first microcontroller unit, the more than two input circuits, the first bus circuit and the power supply self-checking circuit and the input power supply end of the input device, the output end of each input circuit, the input end of the first bus circuit and the output end of the power supply self-checking circuit are respectively connected with the corresponding I/O end of the first microcontroller unit, more than two signal input ports are arranged on the input device, and the input end of each input circuit is respectively connected with one signal input port on the input device; the second signal transmission bus module comprises a second microcontroller unit, a second power supply circuit, an outputter, more than two output circuits and a second bus circuit, wherein the output end of the second power supply circuit is respectively connected with the second microcontroller unit, more than two output circuits and the power supply end of the second bus circuit, the input end of each output circuit and the output end of each second bus circuit are respectively connected with the corresponding I/O end of the second microcontroller unit, more than two signal output ports are arranged on the outputter, and the output end of each output circuit is respectively connected with one signal output port on the outputter; the input end of the first power supply circuit, the input end of the second power supply circuit and the output power supply end of each output circuit are respectively connected with a direct current power supply output end, the input end of the power supply self-checking circuit is connected with the input end of the first power supply circuit, and the three transmission wires are connection wires between the signal transmission end of the first bus circuit and the signal transmission end of the second bus circuit; the other end of a diode six on the positive electrode of the input end of the first power supply circuit is connected with the power supply end of the power supply self-checking circuit and the input power supply end of the input device; the power self-checking circuit comprises twenty-four resistors, twenty-seven bidirectional transient suppression diodes, six-seven bidirectional transient suppression diodes, thirty-six capacitors and a photoelectric coupler III, wherein one end of the twenty-four resistors is connected with the other end of the six diodes on the positive electrode of the input end of the first power circuit, the other end of the twenty-four resistors is connected with one end of a parallel circuit of the thirty-eight capacitors and the seven bidirectional transient suppression diodes, one end of the twenty-four resistors is connected with one end of the twenty-five resistors, the other end of the twenty-five resistors is connected with one end of the six bidirectional transient suppression diodes, the other end of the twenty-five resistors is connected with one end of the thirty-six capacitors again and then is connected with the input positive electrode of the photoelectric coupler III, the other end of the bi-sixteen capacitors is connected with the input negative electrode of the photoelectric coupler III, the other end of the output positive electrode of the photoelectric coupler III is connected with one end of the seventeen capacitors, the other end of the seventeen capacitors is connected with one I/O end of the first microcontroller unit, the other end of the output end of the seventeen capacitors is connected with the output end of the seventeen capacitors of the circuit of the second power circuit in parallel connection with the input positive electrode of the thirty-eight capacitors of the first power circuit.
2. The inter-room signal transmission bus device of a power distribution cabinet according to claim 1, wherein the input end of the first power circuit and the input end of the second power circuit are connected in parallel to the same direct current power output end in the instrument room, and two connecting wires are added between the first signal transmission bus module and the second signal transmission bus module.
3. The inter-room signal transmission bus device of a power distribution cabinet according to claim 1, wherein the first micro-controller unit is composed of a first micro-controller and a first crystal oscillator circuit, a first starting circuit and a first operation display circuit at the periphery of the first micro-controller; the second microcontroller unit consists of a second microcontroller, a second crystal oscillator circuit, a second starting circuit and a second operation display circuit which are arranged on the periphery of the second microcontroller; the first microcontroller and the second microcontroller both adopt STM32 series or alternative series of microcontrollers.
4. The inter-room signal transmission bus device of a power distribution cabinet according to claim 1, 2 or 3, wherein the second signal transmission bus module further comprises a high-power output device and more than one high-power output circuit, the high-power output device is provided with more than one high-power signal output port, the input end of each high-power output circuit is respectively connected with one I/O end on the second microcontroller unit, the output end of each high-power output circuit is connected with one high-power signal output port on the high-power output device, the power end of each high-power output circuit is connected with the output end of the second power circuit, and the output power end of the high-power output device is connected with the output end of the direct-current power supply.
5. The inter-room signal transmission bus device of a power distribution cabinet according to claim 1, 2 or 3, wherein said first bus circuit and said second bus circuit are identical CAN bus circuits, said first bus circuit comprises a resistor one to a resistor seven, a capacitor one to a capacitor three, an inductor one, a CAN isolation transceiver module one, a common mode inductor one, a diode one to a diode two, a bidirectional transient suppression diode one and a triode gas discharge tube one, wherein one end of said resistor one and one end of said resistor two are respectively connected to an I/O terminal dedicated for CAN of said first microcontroller unit, the other end of said resistor one is connected to an RXD terminal of said CAN isolation transceiver module one, one end of said resistor two is connected to a TXD terminal of said CAN isolation transceiver module one, one end of said GND termination capacitor two of said CAN isolation transceiver module one is connected to one end of said capacitor one and then to ground, the VCC end of the CAN isolation transceiver module I is connected with one end of the inductor I, one end of the inductor I is connected with one end of the capacitor I, the other end of the inductor I is connected with the output end of the first power supply circuit, the other end of the resistor III is connected with the output end of the first power supply circuit, the diode I and the diode II are connected in parallel in different directions and then are connected with the bidirectional instant suppression diode I in series to form an overvoltage protection circuit I, the CANH end of the CAN isolation transceiver module I is connected with the input end I of the common mode inductor I, the corresponding output end of the input end I of the common mode inductor I is connected with one end of the overvoltage protection circuit I and then connected with one end of the resistor IV, the other end of the resistor IV is connected with one end of the tripolar gas discharge tube I and then connected with one end of the resistor VI to form a signal transmission end I, the CANL of the CAN isolation transceiver module I is connected with the input end II of the common mode inductor I, the corresponding output end of the input end II of the common mode inductor I is connected with the other end of the overvoltage protection circuit I and then connected with one end of a resistor five, the other end of the resistor five is connected with the other end of the tripolar gas discharge tube I and then connected with the other end of the resistor six and then becomes a signal transmission end II, the CANG of the CAN isolation transceiver module I is connected with one end of a parallel circuit of the resistor seven and the capacitor three, and the other end of the parallel circuit of the resistor seven and the capacitor three is connected with the ground end of the tripolar gas discharge tube I and then becomes a signal transmission end III; the second bus circuit comprises a resistor eight to a resistor fourteen, a capacitor four to a capacitor six, an inductor two, a CAN isolation transceiver module two, a common mode inductor two, a diode three to a diode four, a bidirectional transient suppression diode two and a tripolar gas discharge tube two, wherein one end of the resistor eight and one end of the resistor nine are respectively connected with an I/O end special for CAN of the second micro-controller unit, the other end of the resistor eight is connected with an RXD end of the CAN isolation transceiver module two, one end of the resistor nine is connected with a TXD end of the CAN isolation transceiver module two again, one end of the GND end of the CAN isolation transceiver module two is connected with one end of the capacitor three again and then grounded, the other end of the VCC end of the CAN isolation transceiver module two is connected with one end of the inductor two again, the other end of the second inductor is connected with the output end of the second power circuit, the other end of the third inductor is connected with the output end of the second power circuit, the other end of the resistor ten is connected with the output end of the second power circuit, the diode three and the diode four are connected in different directions and then are connected in series with the bidirectional instant suppression diode two to form an overvoltage protection circuit two, the CANH of the CAN isolation transceiver module two is connected with the input end I of the common mode inductor two, the corresponding output end of the input end I of the common mode inductor two is connected with one end of the overvoltage protection circuit two and then connected with one end of the resistor eleven, the other end of the resistor eleven is connected with one end of the tripolar gas discharge tube two and then becomes a signal transmission end four, the CANL of the CAN isolation transceiver module two is connected with the input end II of the common mode inductor two, the corresponding output end of the input end II of the common mode inductor II is connected with the other end of the overvoltage protection circuit II and then connected with one end of a resistor twelve, the other end of the resistor twelve is connected with the other end of the tripolar gas discharge tube II and then connected with the other end of a resistor thirteen and then becomes a signal transmission end V, the CANG of the CAN isolation transceiver module II is connected with one end of a parallel circuit of the resistor fourteen and a capacitor V, and the other end of the parallel circuit of the resistor fourteen and the capacitor V is connected with the ground end of the tripolar gas discharge tube II and then becomes a signal transmission end V; the first signal transmission end, the second signal transmission end and the third signal transmission end of the first bus circuit are correspondingly connected with the fourth signal transmission end, the fifth signal transmission end and the sixth signal transmission end of the second bus circuit respectively to form three connecting wires between the first signal transmission bus module and the second signal transmission bus module.
6. The inter-room signal transmission bus device of a power distribution cabinet according to claim 1,2 or 3, wherein the two or more input circuits adopt the same circuit structure as each input circuit, and each signal to be transmitted in the mechanism room is connected with one I/O terminal of the first microcontroller unit through one signal input port on the input device by using one input circuit; the input circuit comprises a resistor fifteen-a resistor eighteen, a bidirectional transient suppression diode three, a capacitor seven-a capacitor eight and a photoelectric coupler one, wherein a signal input port on the input device is connected with one end of the resistor fifteen, the signal input port is connected with the input end of the first power supply circuit, the other end of the resistor fifteen is connected with one end of the bidirectional transient suppression diode three and then is connected with one end of the resistor sixteen, the other end of the resistor sixteen is connected with one end of the capacitor seventeen and then is connected with the input positive electrode of the photoelectric coupler one, the other end of the resistor seventeen is connected with the other end of the capacitor seven and then is connected with the input negative electrode of the photoelectric coupler one, one output positive electrode of the photoelectric coupler one is connected with one end of the capacitor eight, the other end of the output positive electrode of the photoelectric coupler one is connected with one I/O end of the first microcontroller unit, the other end of the output negative electrode of the photoelectric coupler one is connected with the other end of the capacitor eight is grounded, and the other end of the resistor eighteen is connected with the output end of the first power supply circuit.
7. The inter-room signal transmission bus device of a power distribution cabinet according to claim 1,2 or 3, wherein the more than two output circuits adopt the same circuit structure of each output circuit, each signal to be transmitted of the second micro-controller unit is connected with one output circuit by one I/O terminal thereof, and then connected with a signal receiving device of an instrument room by one signal output port on the output device; the output circuit comprises a resistor nineteen, a resistor twenty, a photoelectric coupler II, a capacitor nine, a bidirectional transient suppression diode IV and a rectifier, wherein one end of the resistor nineteen is connected with one end of the output end of the second power supply circuit, the other end of the resistor twenty is connected with one end of the resistor twenty, the other end of the resistor twenty is connected with the input anode of the photoelectric coupler II, one I/O (input/output) terminal of the second micro-controller unit is connected with the input cathode of the photoelectric coupler II, one end of the output anode of the photoelectric coupler II is connected with one end of the capacitor nine and then connected with the input direct current anode of the rectifier, the other end of the output cathode of the photoelectric coupler II is connected with the other end of the capacitor nine and then connected with the input direct current anode of the rectifier, the output end of the rectifier I is connected with the output end of the direct current power supply as an output power supply, and the output end of the rectifier II is connected with a signal output port on the output device.
8. The inter-room signal transmission bus device of the power distribution cabinet according to claim 4, wherein the more than one high-power output circuits adopt the same circuit structure, one high-power output circuit comprises a resistor twenty-first to twenty-third, a field effect tube, a diode five and a power relay, one end of the resistor twenty-first is connected with one I/O end of the second micro-controller unit, the other end of the resistor twenty-first is connected with the grid electrode of the field effect tube, the other end of the resistor twenty-first is connected with the source electrode of the field effect tube and then grounded, one end of the resistor twenty-third is connected with the drain electrode of the field effect tube, the other end of the resistor twenty-third is connected with one end of the diode five and then connected with the coil end of the power relay, the other end of the coil of the power relay is connected with the output end of the second power circuit, one contact end of the power relay is connected with the output end of the direct-current power supply through the high-power output device, and the other end of the power relay is connected with a high-load through the high-power output contact.
9. The inter-room signal transmission bus device of claim 4, wherein the first power circuit comprises a fuse first, a variable resistor first, an inductor third, an isolated wide voltage input power first, a voltage regulator first, a capacitor second to twelve, a bidirectional transient suppression diode fifth and a diode sixth, wherein an input positive electrode of the first power circuit is connected to one end of the fuse first, one end of the fuse first is connected to one end of the variable resistor first and then to one end of the capacitor eleven is connected to one end of the inductor third, one end of the inductor third is connected to one end of the capacitor twelve and then to an input positive electrode of the isolated wide voltage input power first, the other end of the first power circuit is connected to an input negative electrode of the isolated wide voltage input power first, the other end of the capacitor second is connected to another end of the capacitor eleven is connected to another end of the isolated wide voltage input power first, one end of the isolated wide voltage input power first is connected to another end of the capacitor second is connected to another end of the isolated wide voltage input power second, another end of the isolated wide voltage input power first is connected to another end of the capacitor second is connected to another end of the isolated wide voltage input power first is connected to another end of the isolated wide voltage input power second is connected to another end of the capacitor second is connected to another end of the isolated wide voltage input electrode, another end of the capacitor second is connected to another end of the isolated voltage is connected to another end of the capacitor third is connected to another end of the capacitor, and another end of the output is connected to another end of the voltage is connected to another end is connected to another electrode, and is connected to another electrode, and the electronic device, and another electrode is composed to another device, and another device is composed. One path of the other end of the capacitor thirteen is grounded, the other path of the capacitor is connected with an output cathode of an isolated wide voltage input power supply I, one path of the other end of the diode six is connected with an input anode of the first power supply circuit, the other path of the other end of the diode six is connected with one end of a bidirectional instant suppression diode five, the other end of the bidirectional instant suppression diode five is connected with the input cathode of the first power supply circuit, and the output anode of the isolated wide voltage input power supply I and the output end of the voltage stabilizer I respectively provide power for a first microcontroller unit, more than two input circuits, a first bus circuit and a power supply self-checking circuit; the second power supply circuit comprises a second fuse, a second variable resistor, a fourth inductor, an isolated wide voltage input power supply, a second voltage stabilizer and twenty-three to thirty-five capacitors, wherein the input positive electrode of the second power supply circuit is connected with one end of the second fuse, the other end of the second fuse is connected with one end of the second variable resistor, one end of the twenty-three capacitors is connected with one end of the twenty-four capacitors, the other end of the fourth inductor is connected with one end of the twenty-five capacitors, one end of the second capacitor is connected with the input positive electrode of the isolated wide voltage input power supply, the input negative electrode of the second power supply circuit is connected with the other end of the second variable resistor, the other end of the second capacitor is connected with the other end of the twenty-three capacitors, the other end of the twenty-four capacitors is connected with the input negative electrode of the isolated wide voltage input power supply, the output anode of the isolation wide voltage input power supply II is connected with one end of a capacitor twenty-seven, one end of the capacitor twenty-eight, one end of the capacitor twenty-nine, one end of the voltage stabilizer II is connected with the input end of the voltage stabilizer II, one end of the capacitor thirty-one, one end of the capacitor thirty-three, one end of the capacitor thirty-four, one end of the capacitor thirty-five, the output cathode of the isolation wide voltage input power supply II is connected with the other end of the capacitor twenty-seven, the other end of the capacitor twenty-eight, the other end of the capacitor twenty-nine, the ground end of the voltage stabilizer II, the other end of the capacitor thirty-one, the other end of the capacitor thirty-three, the other end of the capacitor thirty-four, one end of the capacitor twenty-six, the input cathode of the isolation wide voltage input power supply II, the other path of the other end of the capacitor twenty-six is grounded, the other path of the capacitor twenty-six is connected with the output cathode of the isolation wide voltage input power supply II, the output anode of the isolation wide voltage input power supply II and the output end of the voltage stabilizer II respectively provide power for the second micro-controller unit, more than two output circuits, the second bus circuit and the high-power output circuit, and the input anode and the input cathode of the first power circuit and the second power circuit are respectively connected with the anode and the cathode of the output end of the direct-current power supply.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2682506Y (en) * | 2004-03-17 | 2005-03-02 | 海信集团有限公司 | Tax-control cashing machine with novel power supply monitoring module |
| CN203859584U (en) * | 2013-12-04 | 2014-10-01 | 西安工程大学 | Integrated on-line monitoring apparatus of high-voltage switch cabinet |
| CN205248194U (en) * | 2015-12-14 | 2016-05-18 | 宁波舜韵电子有限公司 | Drive circuit of relay |
| CN209881652U (en) * | 2019-05-09 | 2019-12-31 | 河南卫华重型机械股份有限公司 | Digital input EMC circuit applied to crane control system |
| CN210640904U (en) * | 2019-11-08 | 2020-05-29 | 武汉恩逸互联科技有限公司 | CAN bus interface protection circuit, communication module and system |
| CN211018264U (en) * | 2019-09-30 | 2020-07-14 | 南京微通电子技术有限公司 | CAN communication circuit with high anti-interference characteristic |
| CN213186116U (en) * | 2020-11-13 | 2021-05-11 | 山西潞安环保能源开发股份有限公司漳村煤矿 | CAN bus anti-interference circuit of mining grounding line selection device |
| CN116374765A (en) * | 2023-04-07 | 2023-07-04 | 淄博东升电梯工程有限公司 | Elevator door state monitoring system |
| CN219871534U (en) * | 2023-03-29 | 2023-10-20 | 江苏斯菲尔电气股份有限公司 | Multifunctional circuit of three-phase electric energy meter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877942A (en) * | 2017-02-24 | 2017-06-20 | 深圳市沃特玛电池有限公司 | CAN electromagnetic interference suppression circuits |
-
2024
- 2024-01-12 CN CN202410044582.7A patent/CN117559234B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2682506Y (en) * | 2004-03-17 | 2005-03-02 | 海信集团有限公司 | Tax-control cashing machine with novel power supply monitoring module |
| CN203859584U (en) * | 2013-12-04 | 2014-10-01 | 西安工程大学 | Integrated on-line monitoring apparatus of high-voltage switch cabinet |
| CN205248194U (en) * | 2015-12-14 | 2016-05-18 | 宁波舜韵电子有限公司 | Drive circuit of relay |
| CN209881652U (en) * | 2019-05-09 | 2019-12-31 | 河南卫华重型机械股份有限公司 | Digital input EMC circuit applied to crane control system |
| CN211018264U (en) * | 2019-09-30 | 2020-07-14 | 南京微通电子技术有限公司 | CAN communication circuit with high anti-interference characteristic |
| CN210640904U (en) * | 2019-11-08 | 2020-05-29 | 武汉恩逸互联科技有限公司 | CAN bus interface protection circuit, communication module and system |
| CN213186116U (en) * | 2020-11-13 | 2021-05-11 | 山西潞安环保能源开发股份有限公司漳村煤矿 | CAN bus anti-interference circuit of mining grounding line selection device |
| CN219871534U (en) * | 2023-03-29 | 2023-10-20 | 江苏斯菲尔电气股份有限公司 | Multifunctional circuit of three-phase electric energy meter |
| CN116374765A (en) * | 2023-04-07 | 2023-07-04 | 淄博东升电梯工程有限公司 | Elevator door state monitoring system |
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