CN112630591A - Wireless communication three-phase power consumption monitoring terminal - Google Patents
Wireless communication three-phase power consumption monitoring terminal Download PDFInfo
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- CN112630591A CN112630591A CN202011321441.3A CN202011321441A CN112630591A CN 112630591 A CN112630591 A CN 112630591A CN 202011321441 A CN202011321441 A CN 202011321441A CN 112630591 A CN112630591 A CN 112630591A
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
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Abstract
The invention relates to the technical field of intelligent monitoring, and discloses a wireless communication three-phase power consumption monitoring terminal, which comprises a sampling module, a three-phase metering module, a main control module, a communication interface module, a wireless communication module, an EEPROM (electrically erasable programmable read-only memory) storage and a switching power supply; the switching power supply is connected with the three-phase four-wire system circuit, the input end of the sampling module is connected with the three-phase four-wire system circuit, and the output end of the sampling module is connected with the input end of the three-phase metering module and used for collecting electric quantity parameters such as three-phase voltage, current and the like; the output end of the three-phase metering module is connected with the main control module and used for processing the parameter data of the electric quantity, the main control module is also electrically connected with the communication interface module, the wireless communication module and the EEPROM storage respectively, and the main control module stores the processed data in the EEPROM storage. Compared with the prior art, the invention realizes accurate power utilization information acquisition and processing and reliable data remote transmission function.
Description
Technical Field
The invention relates to the technical field of intelligent monitoring, in particular to a wireless communication three-phase power utilization monitoring terminal.
Background
With the acceleration of the urbanization process, the urban area is enlarged, and the construction and development of municipal utilities are rapid. The intelligent plant supervision and transformation project aiming at environmental protection supervision and management of chemical industry, pharmacy, steel, breeding plants and the like is difficult to effectively monitor the operation conditions of electric equipment such as dust removal and desulfurization, sewage treatment and the like, the traditional monitoring operation conditions mostly depend on the inspection tour of operators, the conditions of the electric equipment on site are judged manually, when the electric equipment is aged and is about to break down, the electric equipment is difficult to monitor, and remote real-time power utilization monitoring, metering and management can not be carried out.
Disclosure of Invention
The purpose of the invention is as follows: the terminal equipment has the functions of three-phase forward, reverse and combined active electric energy metering and split-phase metering, can monitor operation parameters such as each phase voltage, current, active power, power factor, total active power, frequency and the like, and is used for metering and monitoring electric energy of three branches of a three-phase power supply or a single-phase power supply.
The technical scheme is as follows: the invention provides a wireless communication three-phase power consumption monitoring terminal which comprises a sampling module, a three-phase metering module, a main control module, a communication interface module, a wireless communication module, an EEPROM (electrically erasable programmable read-Only memory) and a switching power supply, wherein the sampling module is used for sampling the power consumption of a power supply;
the switching power supply is connected with the three-phase four-wire system circuit, the input end of the sampling module is connected with the three-phase four-wire system circuit, and the output end of the sampling module is connected with the input end of the three-phase metering module and used for collecting electric quantity parameters such as three-phase voltage and current; the output end of the three-phase metering module is connected with the main control module and used for processing the parameter data of the electrical quantity, the main control module is further electrically connected with the communication interface module, the wireless communication module and the EEPROM storage respectively, the main control module stores the processed data in the EEPROM storage, and the main control module communicates with the remote control platform through the wireless communication module.
Furthermore, the sampling module adopts a three-phase open type current transformer, and the output end of the sampling module is connected with the corresponding input end interface of the three-phase metering module.
Further, the three-phase metering module adopts an RN8302B type three-phase multifunctional metering chip.
Furthermore, the communication interface module adopts an RS485 interface chip, and the communication protocol adopts a Modbus-RTU protocol.
Further, the main control module adopts SOC chip R7F0C004, and it includes MCU treater, LCD drive, 4 independent hardware UART, 2 way hardware I2C interfaces, the MCU treater through software simulation SPI interface with three-phase metering module communication is connected with EEPROM storage through I2C interface, is connected with RS485 interface chip and wireless communication module respectively through independent hardware UART.
Furthermore, the wireless communication module is provided with a wireless communication program which comprises a main program and an interrupt service program, wherein the main program completes the initialization work of communication software and hardware of the monitoring terminal, then enters a main cycle to process the received instruction, and enables the monitoring terminal to enter a low power consumption state to wait for interrupt wakeup when no instruction to be processed exists; the interrupt service program is used for responding to the communication interface to receive the interrupt, caching the received bytes to form a complete instruction, triggering and starting the interrupt service program after the main control module receives the instruction, firstly judging whether the address of the monitoring terminal is the address of the monitoring terminal, and if the address is the address of the monitoring terminal, judging the command: and if the command is a data uploading command, uploading the metering monitoring data information stored in the monitoring terminal to a remote platform through a wireless communication module.
Furthermore, the monitoring terminal further comprises an LCD display module, wherein the LCD display module adopts an 8-segment code LCD screen and is connected with the LCD drive of the main control module, and the LCD display module is used for displaying the electrical quantity parameters processed by the main control module.
Further, the master control module further comprises a hardware real-time clock RTC with temperature compensation, and the hardware real-time clock RTC is connected with a clock oscillation circuit in the RN8302B type three-phase multifunctional metering chip.
Further, the monitoring terminal is arranged in the shell, and a DIN standard guide rail is arranged on one side of the shell.
Has the advantages that:
1. the invention has the functions of three-phase forward, reverse and combined active electric energy metering and split-phase metering, can monitor the operation parameters of each phase voltage, current, active power, power factor, total active power, frequency and the like, and is used for electric energy metering and monitoring of three branches of a three-phase power supply or a single-phase power supply.
2. The invention provides a standard RS485 communication mode, and meets the requirements of calibration, on-site reading and near-end networking. The specially designed wireless module serial port communication interface is matched with a corresponding wireless communication module so as to meet the requirement of a wireless networking communication environment.
3. The communication interface module adopts an RS485 interface chip and a combination of a balanced driver and a differential receiver, can inhibit common-mode interference and has good anti-noise interference capability.
4. The main control module can realize the remote interaction of data and an internet platform through the UART interface and the simple AT instruction operation and the wireless communication module.
5. The invention realizes accurate power utilization information acquisition and processing and reliable data remote transmission function. The guide rail type installation and the sampling design of the open-close type mutual inductor realize the simple, convenient and quick installation and the flexible configuration of communication modularization, and can adapt to various field use environments.
Drawings
FIG. 1 is an overall structural configuration of a monitoring terminal according to the present invention;
FIG. 2 is a schematic block diagram of a monitoring terminal of the present invention;
FIG. 3 is an internal schematic block diagram of a three-phase metering module of the monitoring terminal of the present invention;
FIG. 4 is a flowchart of a measuring range sequence of the three-phase measuring module of the monitoring terminal according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Referring to the attached drawings 1-4, the invention discloses a wireless communication three-phase power consumption monitoring terminal which is arranged in a shell, wherein a DIN standard guide rail is arranged on one side of the shell. A sampling module, a three-phase metering module, a main control module, a communication interface module, a wireless communication module, an EEPROM storage and a switch power supply are arranged in the shell.
The switching power supply is connected with the three-phase four-wire system circuit, the input end of the sampling module is connected with the three-phase four-wire system circuit, and the output end of the sampling module is connected with the input end of the three-phase metering module and used for collecting electric quantity parameters such as three-phase voltage, current and the like; the output end of the three-phase metering module is connected with the main control module and used for processing the parameter data of the electric quantity, the main control module is further electrically connected with the communication interface module, the wireless communication module and the EEPROM respectively, and the main control module stores the processed data in the EEPROM. The detailed connection block diagram is shown in fig. 2.
In this embodiment, the sampling module is a three-phase open current transformer, and the output end of the sampling module is connected to the corresponding input end interface of the three-phase metering module. See the outline drawing of the attached figure 1, and the right side is the three-phase open type current transformer.
The switching power supply adopts the switching power supply which is designed by taking the AC/DC chip PN8130H as a core, can provide two paths of power supplies of a main control circuit and a wireless communication circuit which are mutually isolated, and has simple and reliable circuits. The switch power supply mainly comprises a three-phase half-wave rectification input circuit, an RCD absorption circuit, a PWM control output circuit of PN8130H, an optical coupling isolation voltage negative feedback circuit, an auxiliary power supply circuit, a high-frequency transformer and two rectification filter circuits for isolating the output power supply. Overcurrent, overvoltage and overtemperature protection and EMI and EMC measures are adopted, and the working stability and reliability of the circuit are improved.
The three-phase metering module adopts an RN8302B type three-phase multifunctional metering chip. The internal principle block diagram of the device is shown in figure 3, the active power, the reactive power and the apparent power of fundamental waves and full waves can be measured simultaneously, and power factors, voltage and current effective values, voltage and current phase angles, harmonic calculation and the like can be provided.
The communication interface module adopts an RS485 interface chip, and the communication protocol adopts a Modbus-RTU protocol. The RS485 interface chip adopts the combination of a balanced driver and a differential receiver, can inhibit common-mode interference and has good anti-noise interference capability. The multi-station capability of connecting up to 128 transceivers in parallel on the bus is allowed, and an operator can conveniently establish a device monitoring network on site by using a single RS485 interface.
In this embodiment, main control module adopts SOC chip R7F0C004, and it includes the MCU treater, the LCD drive, 4 way independent hardware UART, 2 way hardware I2C interfaces, the MCU treater passes through software simulation SPI interface and three-phase metering module communication, be connected with EEPROM storage through the I2C interface, be connected with RS485 interface chip and wireless communication module respectively through independent hardware UART.
In order to display the monitoring data of the monitoring terminal, an LCD display module is further arranged on the monitoring terminal, and the LCD display module adopts an 8-segment code LCD screen which is connected with the LCD drive of the main control module and is used for displaying the electrical quantity parameters processed by the main control module. The electric quantity display defaults to 1 decimal, and when the data exceed 999999.9, the data are turned over and accumulated again, and the MCU controls the automatic screen turning.
The master control module of the SOC chip R7F0C004 also comprises a hardware real-time clock RTC with temperature compensation, which is connected with a clock oscillation circuit in the RN8302B type three-phase multifunctional metering chip.
The main control module of the monitoring terminal can realize remote communication of the wireless communication module through an internal independent hardware UART interface, and the wireless communication module can be GPRS, NB-IOT, WiFi communication and the like.
The main control module realizes remote interaction of data and an internet platform through an independent hardware UART interface and simple AT instruction operation and an embedded wireless communication module. The wireless communication program set in the wireless communication module mainly comprises a main program and an interrupt service program. The main program completes the initialization work of communication software and hardware of the monitoring terminal, and then enters the main loop to process the received user platform (remote platform, such as a background management system) instruction. And when no instruction to be processed exists, the whole monitoring terminal enters a low-power consumption state to wait for interruption and awakening. The interrupt service program is used for responding to the interrupt received by the communication interface, caching the received bytes to form a complete instruction, judging whether the instruction target is the local machine, if so, storing the instruction target into an instruction queue, and otherwise, discarding the instruction. Because the sending speed of the platform instruction is uncertain, when a plurality of instructions are continuously transmitted, if the instructions are directly transmitted to the main control module, the instructions are conflicted, a circular queue is designed for buffering the communication instruction, and the matching problem of high-speed and low-speed transmission modes in a communication field is solved.
The interrupt service program is triggered and started after the main control module receives an upper control platform (a remote platform, such as a background management system) command, whether the address of the monitoring terminal is the address or not is determined, and if the address is the address of the monitoring terminal, the command is judged: and if the command is a data uploading command, uploading the metering monitoring data information stored in the monitoring terminal to a remote platform through a wireless communication module.
When the monitoring terminal is used for metering, the monitoring terminal enters initialization after being electrified, and parameters such as metering function, timing, interruption and the like are configured through the main control module and the three-phase metering module. Then, a metering sampling cycle period is entered, and the sampling frequency is set according to the initialization of a program. See fig. 4.
The electrical parameter monitoring function except for the electric energy measurement is also realized by providing basic data by an RN8302B type three-phase multifunctional measurement chip, processing the data after collection, and calculating the electric quantity parameters such as voltage, current effective value, power factor, harmonic data and the like through discrete sample points. And then the data are stored in an EEPROM (electrically erasable programmable read-only memory) to avoid data loss after power failure. And restarting sampling after each sampling period is finished, and repeating the process. The detailed metering sampling process is shown in fig. 4.
The above embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (9)
1. A wireless communication three-phase electricity consumption monitoring terminal is characterized by comprising a sampling module, a three-phase metering module, a main control module, a communication interface module, a wireless communication module, an EEPROM (electrically erasable programmable read-Only memory) and a switching power supply;
the switching power supply is connected with the three-phase four-wire system circuit, the input end of the sampling module is connected with the three-phase four-wire system circuit, and the output end of the sampling module is connected with the input end of the three-phase metering module and used for collecting electric quantity parameters such as three-phase voltage and current; the output end of the three-phase metering module is connected with the main control module and used for processing the parameter data of the electrical quantity, the main control module is further electrically connected with the communication interface module, the wireless communication module and the EEPROM storage respectively, the main control module stores the processed data in the EEPROM storage, and the main control module communicates with the remote control platform through the wireless communication module.
2. The wireless communication three-phase electricity consumption monitoring terminal according to claim 1, wherein the sampling module is a three-phase open current transformer, and the output end of the sampling module is connected with the corresponding input end interface of the three-phase metering module.
3. The wireless communication three-phase electricity consumption monitoring terminal as claimed in claim 1, wherein the three-phase metering module adopts a RN8302B type three-phase multifunctional metering chip.
4. The wireless communication three-phase power consumption monitoring terminal according to claim 3, wherein the communication interface module adopts an RS485 interface chip, and the communication protocol adopts a Modbus-RTU protocol.
5. The wireless communication three-phase power consumption monitoring terminal of claim 4, wherein the main control module adopts an SOC chip R7F0C004, which includes an MCU processor, an LCD driver, 4 independent hardware UARTs and 2 hardware I2C interfaces, the MCU processor communicates with the three-phase metering module through a software simulation SPI interface, is connected with an EEPROM storage through an I2C interface, and is respectively connected with an RS485 interface chip and the wireless communication module through an independent hardware UART.
6. The wireless communication three-phase power consumption monitoring terminal according to claim 5, wherein the wireless communication module is provided with a wireless communication program, which comprises a main program and an interrupt service program, the main program completes the initialization of communication software and hardware of the monitoring terminal, and then enters a main loop to process the received command, and when no command to be processed exists, the monitoring terminal enters a low power consumption state to wait for interrupt wakeup; the interrupt service program is used for responding to the communication interface to receive the interrupt, caching the received bytes to form a complete instruction, triggering and starting the interrupt service program after the main control module receives the instruction, firstly judging whether the address of the monitoring terminal is the address of the monitoring terminal, and if the address is the address of the monitoring terminal, judging the command: and if the command is a data uploading command, uploading the metering monitoring data information stored in the monitoring terminal to a remote platform through a wireless communication module.
7. The wireless communication three-phase power consumption monitoring terminal according to claim 5, further comprising an LCD display module, which adopts an 8-segment code LCD screen and is connected with the LCD driver of the main control module, for displaying the processed electrical quantity parameters of the main control module.
8. The wireless communication three-phase electricity consumption monitoring terminal as claimed in claim 5, wherein the master control module further comprises a hardware real-time clock RTC with temperature compensation, which is connected with a clock oscillation circuit in the RN8302B type three-phase multifunctional metering chip.
9. The wireless communication three-phase power consumption monitoring terminal according to any one of claims 1 to 8, wherein the monitoring terminal is arranged in a housing, and a DIN standard guide rail is arranged on one side of the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011321441.3A CN112630591A (en) | 2020-11-23 | 2020-11-23 | Wireless communication three-phase power consumption monitoring terminal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011321441.3A CN112630591A (en) | 2020-11-23 | 2020-11-23 | Wireless communication three-phase power consumption monitoring terminal |
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| CN112630591A true CN112630591A (en) | 2021-04-09 |
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| CN202011321441.3A Pending CN112630591A (en) | 2020-11-23 | 2020-11-23 | Wireless communication three-phase power consumption monitoring terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325089A (en) * | 2021-12-27 | 2022-04-12 | 杭州万高科技股份有限公司 | Single-phase electric energy metering chip and intelligent thing allies oneself with table based on IR46 standard |
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2020
- 2020-11-23 CN CN202011321441.3A patent/CN112630591A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325089A (en) * | 2021-12-27 | 2022-04-12 | 杭州万高科技股份有限公司 | Single-phase electric energy metering chip and intelligent thing allies oneself with table based on IR46 standard |
| CN114325089B (en) * | 2021-12-27 | 2024-03-19 | 杭州万高科技股份有限公司 | Single-phase electric energy metering chip and intelligent thing allies oneself with table based on IR46 standard |
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