CN210271221U - Data acquisition device for microgrid controller - Google Patents
Data acquisition device for microgrid controller Download PDFInfo
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- CN210271221U CN210271221U CN201921805180.5U CN201921805180U CN210271221U CN 210271221 U CN210271221 U CN 210271221U CN 201921805180 U CN201921805180 U CN 201921805180U CN 210271221 U CN210271221 U CN 210271221U
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Abstract
The utility model provides a data acquisition device for microgrid controller, the device includes host system, power module, analog signal acquisition module, digital signal acquisition module and communication module, power module connects respectively host system, analog signal acquisition module, digital signal acquisition module and communication module, analog signal acquisition module includes multichannel current acquisition circuit and multichannel voltage acquisition circuit, digital signal acquisition module includes digital signal input circuit and digital signal output circuit, communication module adopts multichannel RS485 communication circuit. The utility model discloses the circuit structure of device is simple, and the cost is lower, and the suitability is strong, and the safety and stability, the various data signal of collection microgrid controller that can be timely.
Description
Technical Field
The utility model relates to a data acquisition device belongs to little electric wire netting control technical field.
Background
In recent years, the new energy industry in China develops rapidly, and especially unprecedented development is achieved in the fields of wind power generation and solar energy, but the new energy industry is limited by factors such as geographical distribution, seasonal variation, day and night alternation and the like, so that the electric energy quality and safe and stable operation of a power grid adopting new energy are easily influenced.
Usually, a plurality of power generation devices, energy storage devices and related loads thereof form a microgrid system together, data interaction is required among all devices in the microgrid system, and a microgrid control device is a key device for assisting communication coordination among all devices in the microgrid system, collects data of the microgrid controller in real time and knows the working condition of the microgrid controller, and is a prerequisite condition for ensuring normal operation of the microgrid system.
Disclosure of Invention
To the problem, the utility model provides a data acquisition device for microgrid controller through the circuit connection microgrid controller, gathers the digital signal of the analog signal of microgrid inboard equipment in real time, with signal transmission to host system, and the data signal who will gather again transmits for external equipment through RS485, realizes the real-time data acquisition of microgrid controller, and circuit safety and stability, simple structure, the cost is lower, and the suitability is strong.
In order to solve the technical problem, the utility model discloses a following technical means:
a data acquisition device for a microgrid controller comprises a main control module, a power supply module, an analog signal acquisition module, a digital signal acquisition module and a communication module.
The power module is respectively connected with the main control module, the analog signal acquisition module, the digital signal acquisition module and the communication module.
The analog signal acquisition module comprises a multi-path current acquisition circuit and a multi-path voltage acquisition circuit, the current acquisition circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a first operational amplifier, a second operational amplifier, a sixth resistor, a first switch diode and a second capacitor, one end of the first resistor is connected with the microgrid controller, the other end of the first resistor is respectively connected with one end of the second resistor and one end of the third resistor, the other end of the second resistor is connected with the non-inverting input end of the first operational amplifier, the other end of the third resistor is connected with one end of the fourth resistor, the first capacitor is connected with the two ends of the third resistor in parallel, the other end of the fourth resistor is connected with the inverting input end of the first operational amplifier, one end of the fifth resistor is connected with a 1.5V power supply, the other end of the fifth resistor is connected with the non-inverting input end of the first operational amplifier, the output end of the first operational amplifier is connected with the non-inverting input end of the second operational amplifier, the output end of the second operational amplifier is respectively connected with one end of the sixth resistor, the 3 pins of the first switch diode and the inverting input end of the second operational amplifier, the 1 pin of the first switch diode is connected with the 5V power supply, the 2 pins of the first switch diode are grounded, the other end of the sixth resistor is respectively connected with one end of the second capacitor and the main control module, and the other end of the second capacitor is grounded. The circuit structure of the voltage acquisition circuit is the same as that of the current acquisition circuit.
The digital signal acquisition module comprises a digital signal input circuit and a digital signal output circuit, one end of the digital signal input circuit is connected with the microgrid controller, the other end of the digital signal input circuit is connected with one end of the main control module, one end of the digital signal output circuit is connected with the other end of the main control module, and the other end of the digital signal output circuit is connected with the microgrid controller.
The communication module adopts multichannel RS485 communication circuit, master control module is connected to RS485 communication circuit's one end, and external equipment is connected to RS485 communication circuit's the other end.
Further, the main control module selects an MCU.
Furthermore, the power supply module comprises a 5V power supply circuit and a 3.3V power supply circuit, the 5V power supply circuit comprises a third capacitor, a seventh resistor, a first voltage reduction regulator, a first diode, a first inductor, an eighth resistor and a ninth resistor, one end of the third capacitor is connected with the power input end of the first voltage reduction voltage stabilizer by a 24V power supply, the other end of the third capacitor is grounded, the seventh resistor is connected in parallel to a power input end of the first voltage reduction voltage stabilizer, a switch node of the first voltage reduction voltage stabilizer is connected with one end of the first diode and one end of the first inductor respectively, the other end of the first diode is grounded, the other end of the first inductor is connected with one end of the eighth resistor and one end of the ninth resistor respectively, the other end of the eighth resistor is connected with a feedback pin of the first voltage reduction voltage stabilizer, and the other end of the ninth resistor outputs a 5V power supply.
The 3.3V power supply circuit comprises a fourth capacitor, a first linear voltage stabilizer, a fifth capacitor and a tenth resistor, wherein a 5V power supply is connected to one end of the fourth capacitor and the power input end of the first linear voltage stabilizer respectively, the other end of the fourth capacitor is grounded, the fifth capacitor is connected between the power output end of the first linear voltage stabilizer and the grounding end in parallel, the power output end of the first linear voltage stabilizer is connected with one end of the tenth resistor, and the other end of the tenth resistor outputs a 3.3V power supply.
Furthermore, the digital signal input circuit comprises an eleventh resistor, a sixth capacitor, a first triode, a twelfth resistor, a thirteenth resistor and a seventh capacitor, one end of the eleventh resistor is connected with the microgrid controller, one end of the eleventh resistor and one end of the sixth capacitor are respectively connected with the base electrode of the first triode, the other end of the sixth capacitor and the emitter electrode of the first triode are both grounded, the collector electrode of the first triode is respectively connected with one end of the twelfth resistor and one end of the thirteenth resistor, the other end of the twelfth resistor is connected with a 5V power supply, the other end of the thirteenth resistor is respectively connected with one end of the seventh capacitor and the main control module, and the other end of the seventh capacitor is grounded.
Furthermore, the digital signal output circuit comprises a thirteenth resistor, a fourteenth resistor, an eighth capacitor and a second triode, one end of the thirteenth resistor is connected with the main control module, the other end of the thirteenth resistor, one end of the fourteenth resistor and one end of the eighth capacitor are respectively connected with the base electrode of the second triode, the other end of the fourteenth resistor, the other end of the eighth capacitor and the emitter electrode of the second triode are all grounded, and the collector electrode of the second triode is connected with the microgrid controller.
Further, the RS485 communication circuit comprises a first optical coupler, a second optical coupler, a third optical coupler, a communication chip, a fifteenth resistor, a ninth capacitor, a tenth capacitor, a second diode, a third diode, a fourth diode, a first fuse, a second fuse and a gas discharge tube, wherein the output end of the first optical coupler, the input end of the second optical coupler and the input end of the third optical coupler are respectively connected with the RS485 communication interface of the main control module, the input end of the first optical coupler is connected with the data output end of the communication chip, the output end of the second optical coupler is connected with the enable pin of the communication chip, the output end of the third optical coupler is connected with the data input end of the communication chip, the A end of the communication chip is connected with one end of the first fuse, the other end of the first fuse is connected with an external device, the B end of the communication chip is connected with one end of the second fuse, and the other end of the second fuse is connected with the external, the fifteenth resistor, the second diode and the gas discharge tube are all connected in parallel between A, B ends of the communication chip, the grounding electrode of the gas discharge tube is grounded, the ninth capacitor and the third diode are all connected in parallel between the A end and the grounding end of the communication chip, and the tenth capacitor and the fourth diode are all connected in parallel between the B end and the grounding end of the communication chip.
Furthermore, the data acquisition device still includes indicating circuit, indicating circuit includes LED pilot lamp and two-way receiving and dispatching pipe, the LED pilot lamp is connected the output of two-way receiving and dispatching pipe, the main control module is connected to the input of two-way receiving and dispatching pipe, and 5V is connected to the input power of two-way receiving and dispatching pipe, and 3.3V is connected to the output power of two-way receiving and dispatching pipe.
The following advantages can be obtained by adopting the technical means:
the utility model provides a data acquisition device for a microgrid controller, which is connected with the microgrid controller through an analog signal acquisition module and a digital signal acquisition module, acquires current signals, voltage signals and digital signals in the microgrid controller in real time, transmits the acquired signals to external equipment through a communication module, selects a plurality of RS485 communication circuits for the communication module, can be connected with a plurality of devices at the same time, has strong applicability, and the communication circuit is provided with a plurality of capacitors and diodes, can effectively adjust the voltage at the two ends of the communication chip, prevent overvoltage and overcurrent, the A, B end of the RS485 communication chip is also connected with a self-recovery fuse and a gas discharge tube, the safety and reliability of the communication module can be further ensured, the device also comprises an indicating circuit, an LED indicating lamp in the indicating circuit is switched on and off according to the output signal of the main control module, and the switch can display the state of the microgrid controller. The utility model discloses install whole circuit structure simple, the suitability and the practicality of circuit are stronger, and circuit cost is lower, and the data signal of collection microgrid controller that can be timely, stable provides basic support for the operation and the control of microgrid system.
Drawings
Fig. 1 is a schematic structural diagram of a data acquisition device for a microgrid controller according to the present invention.
Fig. 2 is a schematic diagram of a part of a main control module according to an embodiment of the present invention.
Fig. 3 is a schematic circuit diagram of a power module according to an embodiment of the present invention.
Fig. 4 is a schematic circuit diagram of the current collecting circuit in the embodiment of the present invention.
Fig. 5 is a schematic circuit diagram of a digital signal acquisition module according to an embodiment of the present invention; wherein, (a) is a circuit schematic diagram of the digital signal input circuit, and (b) is a circuit schematic diagram of the digital signal output circuit.
Fig. 6 is a schematic circuit diagram of an RS485 communication circuit according to an embodiment of the present invention.
Fig. 7 is a schematic circuit diagram of an indicating circuit according to an embodiment of the present invention.
In the figure, 1 is a main control module, 2 is a power supply module, 3 is an analog signal acquisition module, 4 is a digital signal acquisition module, 5 is a communication module, and 6 is an indicating circuit.
Detailed Description
The technical scheme of the utility model is further explained by combining the attached drawings as follows:
in the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
A data acquisition device for a microgrid controller is shown in figure 1 and comprises a main control module 1, a power supply module 2, an analog signal acquisition module 3, a digital signal acquisition module 4, a communication module 5 and an indication circuit 6. MCU is selected as the main control module, and the main control module is connected with power module, analog signal acquisition module, digital signal acquisition module, communication module and indicating circuit respectively, receives the signal of analog signal acquisition module and digital signal acquisition module, and output signal gives communication module and indicating circuit simultaneously. The embodiment of the utility model provides an in master control module includes a plurality of STM32F429 chips, other modules are connected respectively to the pin of STM32F429 chip, and figure 2 is the pin connection schematic diagram of one of them STM32F429 chip.
And the power supply module is respectively connected with the main control module, the analog signal acquisition module, the digital signal acquisition module and the communication module and supplies power to the modules. In order to adapt to little grid system better, ensure the normal power supply of each module, the utility model discloses the power module of device adopts dual supply circuit design, as shown in fig. 3, including 5V power supply circuit all the way and 3.3V power supply circuit all the way. The 5V power supply circuit comprises a third capacitor C24, a seventh resistor R11, a first buck regulator U3, a first diode D1, a first inductor L3, an eighth resistor R10 and a ninth resistor R12, one end of the third capacitor C24 is connected with a power supply input end VIN of the first buck regulator U3 to form a 24V power supply, the other end of the third capacitor C24 is grounded, the seventh resistor R11 is connected in parallel with the power supply input end of the first buck regulator U3, a switch node SW of the first buck regulator U3 is respectively connected with one end of a first diode D1 and one end of a first inductor L3, the other end of the first diode D1 is grounded, the other end of the first inductor L3 is respectively connected with one end of an eighth resistor R10 and one end of a ninth resistor R12, the other end of the eighth resistor R10 is connected with a feedback pin FB of the first buck U3, and the other end of the ninth resistor R12 outputs the 5V power supply.
The input voltage of the 3.3V power supply circuit is 5V, the output voltage is 3.3V, the circuit comprises a fourth capacitor C29, a first linear voltage stabilizer U4, a fifth capacitor C30 and a tenth resistor R13, one end of the fourth capacitor C29 and the power input end IN of the first linear voltage stabilizer U4 are respectively connected with a 5V power supply, the other end of the fourth capacitor C29 is grounded, the fifth capacitor C30 is connected between the power output end OUT of the first linear voltage stabilizer U4 and the ground end GND IN parallel, the power output end OUT of the first linear voltage stabilizer U4 is connected with one end of the tenth resistor R13, and the other end of the tenth resistor R13 outputs the 3.3V power supply. The first buck regulator U3 employs LM22676, and the first linear regulator U4 employs LM 1117.
The analog signal acquisition module comprises a plurality of paths of current acquisition circuits and a plurality of paths of voltage acquisition circuits, the plurality of paths of current acquisition circuits are respectively connected with a plurality of nodes to be measured of the microgrid controller, current signals at the nodes are measured, the plurality of paths of voltage acquisition circuits are also connected with the microgrid controller, voltage signals at the nodes to be measured are measured, and the circuit structure of the current acquisition circuits is the same as that of the voltage acquisition circuits. Taking a current collection circuit as an example to describe the circuit structure of the analog signal collection module, as shown in fig. 4, the current collection circuit includes a first resistor RI1, a second resistor RI5, a third resistor RI4, a fourth resistor RI7, a fifth resistor RI6, a first capacitor CI1, a first operational amplifier UAD, a second operational amplifier UAA, a sixth resistor RI9, a first switching diode DI, and a second capacitor CI2, one end of the first resistor RI1 is connected to the microgrid controller, the other end of the first resistor RI1 is connected to one end of the second resistor RI5 and one end of the third resistor RI4, the other end of the second resistor RI5 is connected to the non-inverting input end of the first operational amplifier UAD, the other end of the third resistor RI4 is connected to one end of the fourth resistor RI7, the first capacitor 1 is connected in parallel to two ends of the third resistor RI4, the other end of the fourth resistor RI7 is connected to the inverting input end of the first operational amplifier UAD, and one end of the fifth resistor RI 6861.v 5 is connected to one end of the power supply resistor RI 6865, the other end of the fifth resistor RI6 is connected with the non-inverting input end of the first operational amplifier UAD, the output end of the first operational amplifier UAD is connected with the non-inverting input end of the second operational amplifier UAA, the output end of the second operational amplifier UAA is respectively connected with one end of the sixth resistor RI9, the pin 3 of the first switch diode DI and the inverting input end of the second operational amplifier UAA, the pin 1 of the first switch diode DI is connected with a 5V power supply, the pin 2 of the first switch diode DI is grounded, the other end of the sixth resistor RI9 is respectively connected with one end of the second capacitor CI2 and the main control module, and the other end of the second capacitor CI2 is grounded. The specific models of the first operational amplifier UAD and the second operational amplifier UAA are LM324D, and the specific model of the first switching diode DI is BAV 99.
The digital signal acquisition module comprises a digital signal input circuit and a digital signal output circuit, the microgrid controller is connected to one end of the digital signal input circuit, one end of the main control module is connected to the other end of the digital signal input circuit, the other end of the main control module is connected to one end of the digital signal output circuit, the microgrid controller is connected to the other end of the digital signal output circuit, the digital signal acquisition module realizes the digital signal transmission of the microgrid controller and the main control module, and the digital signal transmission of the microgrid controller and external equipment can be realized by matching with the communication module.
As shown in (a) of fig. 5, the digital signal input circuit includes an eleventh resistor RDI1, a sixth capacitor CDI1, a first transistor QDI1, a twelfth resistor RDI3, a thirteenth resistor RDI4 and a seventh capacitor CDI2, one end of the eleventh resistor RDI1 is connected to the data output terminal of the microgrid controller, the other end of the eleventh resistor RDI1 and one end of the sixth capacitor CDI1 are respectively connected to the base of the first transistor QDI1, the other end of the sixth capacitor CDI1 and the emitter of the first transistor QDI1 are both grounded, the collector of the first transistor QDI1 is respectively connected to one end of the twelfth resistor RDI3 and one end of the thirteenth resistor RDI4, the other end of the twelfth resistor RDI3 is connected to the 5V power supply, the other end of the thirteenth resistor RDI4 is respectively connected to one end of the seventh capacitor CDI2 and the master control module, and the other end of the seventh capacitor CDI2 is grounded.
As shown in fig. 5 (b), the digital signal output circuit includes a thirteenth resistor RO1, a fourteenth resistor RO2, an eighth capacitor CO1 and a second transistor QO1, one end of the thirteenth resistor RO1 is connected to the main control module, the other end of the thirteenth resistor RO1, one end of the fourteenth resistor RO2 and one end of the eighth capacitor CO1 are respectively connected to the base of the second transistor QO1, the other end of the fourteenth resistor RO2, the other end of the eighth capacitor CO1 and the emitter of the second transistor QO1 are all grounded, and the collector of the second transistor QO1 is connected to the data input terminal of the microgrid controller. In the data signal input circuit and the data signal output circuit, the first transistor QDI1 and the second transistor QO1 both adopt an S9013 transistor.
The communication module adopts multichannel RS485 communication circuit, connects host system and different external equipment respectively, for example connects electric energy conversion equipment such as photovoltaic inverter, and RS485 communication circuit transmits signals such as voltage, electric current, switch that host system acquireed to external equipment. Fig. 6 is a schematic circuit diagram of an RS485 communication circuit according to an embodiment of the present invention, the RS485 communication circuit includes a first optical coupler US1, a second optical coupler US2, a third optical coupler US3, a communication chip US4, a fifteenth resistor RS8, a ninth capacitor CS5, a tenth capacitor CS6, a second diode DS1, a third diode DS2, a fourth diode DS3, a first fuse FS1, a second fuse FS2, and a gas discharge tube VS, an output end of the first optical coupler US1, an input end of the second optical coupler US2, and an input end of the third optical coupler US3 are respectively connected to an RS485 communication interface of the main control module, an input end of the first optical coupler US1 is connected to a data output end RO of the communication chip US4, an output end of the second optical coupler US2 is connected to an enabling pin RE (DE, DE) of the communication chip US4, an output end of the third optical coupler US3 is connected to a data input end of the communication chip US4, an a first end of the communication chip US 56 is connected to a fuse FS 8286, the B end of the communication chip US4 is connected with one end of a second fuse FS2, the other end of the second fuse FS2 is connected with external equipment, a fifteenth resistor RS8, a second diode DS1 and a gas discharge tube VS are connected in parallel between the A, B ends of the communication chip US4, the grounding electrode of the gas discharge tube VS is grounded, a ninth capacitor CS5 and a third diode DS2 are connected in parallel between the A end of the communication chip US4 and the grounding end, and a tenth capacitor CS6 and a fourth diode DS3 are connected in parallel between the B end of the communication chip US4 and the grounding end. The specific models of the first optical coupler US1, the second optical coupler US2 and the third optical coupler US3 are TLP2362, the specific model of the communication chip US4 is MAX3485ESA, the specific models of the first fuse FS1 and the second fuse FS2 are SMD1812P110TF, and the specific model of the gas discharge tube VS is B3D 090L.
The embodiment of the utility model provides an in the circuit schematic diagram of indicating circuit is shown in FIG. 7, indicating circuit includes LED pilot lamp and two-way receiving and dispatching pipe, and wherein, the concrete model of two-way receiving and dispatching pipe is 74LVC4245APW, and the preferred emitting diode of LED pilot lamp, the output of two-way receiving and dispatching pipe is connected to the LED pilot lamp, and host system is connected to the input of two-way receiving and dispatching pipe, and 5V is connected to the input power of two-way receiving and dispatching pipe, and 3.3V is connected to the output power of two-way receiving and dispatching. The bidirectional receiving and transmitting tube receives signals from the main control module and then outputs signals to the LED indicating lamp, so that the indicating lamp is turned on or turned off.
The utility model discloses the device passes through analog signal acquisition module and digital signal acquisition module and connects the microgrid controller, gather the current signal in the microgrid controller in real time, voltage signal and digital signal, the signal of gathering passes through communication module and transmits for external equipment, many RS485 communication circuit are chooseed for use to communication module, a plurality of equipment can be connected simultaneously, the suitability is stronger, be provided with a plurality of electric capacity and diode in the communication circuit, can effectively adjust the voltage at communication chip both ends, prevent that the excessive pressure from overflowing, A, B end at RS485 communication chip still is connected with self-resuming fuse and gas discharge tube, can further guarantee communication module's security, the reliability, still include indicating circuit in the device, LED pilot lamp in the indicating circuit is according to master control module's output signal switch, its switch can show the state of microgrid controller. The utility model discloses install whole circuit structure simple, the suitability and the practicality of circuit are stronger, and circuit cost is lower, and the signal of collection microgrid controller that can be timely, stable provides basic support for the operation and the control of microgrid system.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (7)
1. A data acquisition device for a microgrid controller is characterized by comprising a main control module, a power supply module, an analog signal acquisition module, a digital signal acquisition module and a communication module;
the power supply module is respectively connected with the main control module, the analog signal acquisition module, the digital signal acquisition module and the communication module;
the analog signal acquisition module comprises a multi-path current acquisition circuit and a multi-path voltage acquisition circuit, the current acquisition circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a first operational amplifier, a second operational amplifier, a sixth resistor, a first switch diode and a second capacitor, one end of the first resistor is connected with the microgrid controller, the other end of the first resistor is respectively connected with one end of the second resistor and one end of the third resistor, the other end of the second resistor is connected with the non-inverting input end of the first operational amplifier, the other end of the third resistor is connected with one end of the fourth resistor, the first capacitor is connected with the two ends of the third resistor in parallel, the other end of the fourth resistor is connected with the inverting input end of the first operational amplifier, one end of the fifth resistor is connected with a 1.5V power supply, the other end of the fifth resistor is connected with the non-inverting input end of the first operational amplifier, the output end of the first operational amplifier is connected with the non-inverting input end of the second operational amplifier, the output end of the second operational amplifier is respectively connected with one end of the sixth resistor, a pin 3 of the first switching diode and the inverting input end of the second operational amplifier, a pin 1 of the first switching diode is connected with a 5V power supply, a pin 2 of the first switching diode is grounded, the other end of the sixth resistor is respectively connected with one end of the second capacitor and the main control module, and the other end of the second capacitor is grounded;
the circuit structure of the voltage acquisition circuit is the same as that of the current acquisition circuit;
the digital signal acquisition module comprises a digital signal input circuit and a digital signal output circuit, one end of the digital signal input circuit is connected with the microgrid controller, the other end of the digital signal input circuit is connected with one end of the main control module, one end of the digital signal output circuit is connected with the other end of the main control module, and the other end of the digital signal output circuit is connected with the microgrid controller;
the communication module adopts multichannel RS485 communication circuit, master control module is connected to RS485 communication circuit's one end, and external equipment is connected to RS485 communication circuit's the other end.
2. The data acquisition device as claimed in claim 1, wherein the main control module is an MCU.
3. The data acquisition device of claim 1, wherein the power module comprises a 5V power circuit and a 3.3V power circuit, the 5V power circuit comprises a third capacitor, a seventh resistor, a first voltage-reducing regulator, a first diode, a first inductor, an eighth resistor, and a ninth resistor, one end of the third capacitor is connected to the power input terminal of the first voltage-reducing regulator, the other end of the third capacitor is grounded, the seventh resistor is connected in parallel to the power input terminal of the first voltage-reducing regulator, the switching node of the first voltage-reducing regulator is connected to one end of the first diode and one end of the first inductor, the other end of the first diode is grounded, the other end of the first inductor is connected to one end of the eighth resistor and one end of the ninth resistor, the other end of the eighth resistor is connected to the feedback pin of the first voltage-reducing regulator, the other end of the ninth resistor outputs a 5V power supply;
the 3.3V power supply circuit comprises a fourth capacitor, a first linear voltage stabilizer, a fifth capacitor and a tenth resistor, wherein a 5V power supply is connected to one end of the fourth capacitor and the power input end of the first linear voltage stabilizer respectively, the other end of the fourth capacitor is grounded, the fifth capacitor is connected between the power output end of the first linear voltage stabilizer and the grounding end in parallel, the power output end of the first linear voltage stabilizer is connected with one end of the tenth resistor, and the other end of the tenth resistor outputs a 3.3V power supply.
4. The data acquisition device for the microgrid controller as claimed in claim 1, wherein the digital signal input circuit comprises an eleventh resistor, a sixth capacitor, a first triode, a twelfth resistor, a thirteenth resistor and a seventh capacitor, one end of the eleventh resistor is connected with the microgrid controller, the other end of the eleventh resistor and one end of the sixth capacitor are respectively connected with the base of the first triode, the other end of the sixth capacitor is grounded with the emitter of the first triode, the collector of the first triode is respectively connected with one end of the twelfth resistor and one end of the thirteenth resistor, the other end of the twelfth resistor is connected with a 5V power supply, the other end of the thirteenth resistor is respectively connected with one end of the seventh capacitor and the master control module, and the other end of the seventh capacitor is grounded.
5. The data acquisition device for the microgrid controller according to claim 1, wherein the digital signal output circuit comprises a thirteenth resistor, a fourteenth resistor, an eighth capacitor and a second triode, one end of the thirteenth resistor is connected to the main control module, the other end of the thirteenth resistor, one end of the fourteenth resistor and one end of the eighth capacitor are respectively connected to the base of the second triode, the other end of the fourteenth resistor, the other end of the eighth capacitor and the emitter of the second triode are all grounded, and the collector of the second triode is connected to the microgrid controller.
6. The data acquisition device of claim 1, wherein the RS485 communication circuit comprises a first optical coupler, a second optical coupler, a third optical coupler, a communication chip, a fifteenth resistor, a ninth capacitor, a tenth capacitor, a second diode, a third diode, a fourth diode, a first fuse, a second fuse, and a gas discharge tube, wherein an output end of the first optical coupler, an input end of the second optical coupler, and an input end of the third optical coupler are respectively connected to the RS485 communication interface of the main control module, an input end of the first optical coupler is connected to a data output end of the communication chip, an output end of the second optical coupler is connected to an enable pin of the communication chip, an output end of the third optical coupler is connected to a data input end of the communication chip, an A end of the communication chip is connected to one end of the first fuse, and the other end of the first fuse is connected to an external device, the terminal B of the communication chip is connected with one end of the second fuse, the other end of the second fuse is connected with external equipment, the fifteenth resistor, the second diode and the gas discharge tube are all connected in parallel between the A, B terminals of the communication chip, the grounding electrode of the gas discharge tube is grounded, the ninth capacitor and the third diode are all connected in parallel between the terminal A of the communication chip and the grounding terminal, and the tenth capacitor and the fourth diode are all connected in parallel between the terminal B of the communication chip and the grounding terminal.
7. The data acquisition device for the microgrid controller as claimed in claim 1, characterized in that the data acquisition device further comprises an indication circuit, the indication circuit comprises an LED indicator light and a bidirectional transceiving pipe, the LED indicator light is connected with an output end of the bidirectional transceiving pipe, an input end of the bidirectional transceiving pipe is connected with the main control module, an input end of the bidirectional transceiving pipe is connected with a power supply of 5V, and an output end of the bidirectional transceiving pipe is connected with a power supply of 3.3V.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113820988A (en) * | 2021-10-15 | 2021-12-21 | 湖南子宏生态科技股份有限公司 | Sewage treatment automatic control system |
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2019
- 2019-10-24 CN CN201921805180.5U patent/CN210271221U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113820988A (en) * | 2021-10-15 | 2021-12-21 | 湖南子宏生态科技股份有限公司 | Sewage treatment automatic control system |
| CN113820988B (en) * | 2021-10-15 | 2023-10-13 | 湖南子宏生态科技股份有限公司 | Sewage treatment automatic control system |
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