CN111735999A - Internet of things ammeter based on NB-IoT communication technology - Google Patents
Internet of things ammeter based on NB-IoT communication technology Download PDFInfo
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- CN111735999A CN111735999A CN202010800352.0A CN202010800352A CN111735999A CN 111735999 A CN111735999 A CN 111735999A CN 202010800352 A CN202010800352 A CN 202010800352A CN 111735999 A CN111735999 A CN 111735999A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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Abstract
An apparatus of an internet of things electricity meter based on NB-IoT communication technology. The problems of inaccurate electric energy metering, high power consumption and limited communication of the conventional electric meter can be solved. The device comprises an Internet of things ammeter and a network platform, wherein the Internet of things ammeter comprises a controller module, a power supply module, an NB-IoT communication module, a Flash storage module, a metering module, an RTC module, a display module, a switch module and a communication interface, the controller module is connected with the Flash storage module, the RTC module and the metering module through a serial data port to realize metering and storage of real-time electric energy data, the Internet of things ammeter performs data transmission with the network platform through the NB-IoT communication module and the communication interface, and the network platform adopts a B/S mode to design and can access the electric energy data through a webpage and perform switching on and off operation on the Internet of things ammeter. The electric energy data are remotely transmitted to the server, data are processed in a centralized mode through the network platform, abnormal data can be screened, and collection and processing of the electric energy data are facilitated.
Description
Technical Field
The invention belongs to the technical field of electric power data acquisition, and mainly relates to an Internet of things ammeter.
Background
2016 & gt & lt 2020 & gt indicated in the intelligent power grid development plan formulated by the national power grid is a leading and improving stage of the intelligent power grid, and the Chinese technology and equipment reach the international advanced level, so that a unified strong intelligent power grid can be comprehensively built. At the moment, the capacity of optimizing and configuring resources of the power grid is greatly improved, and the electric energy meter of the Internet of things is popularized and applied.
The application field of the Internet of things electric meter is very wide, and besides a large amount of purchases of national power grid companies, the Internet of things electric meter has a large amount of applications in industries such as commercial properties, municipal buildings, schools, hospitals, precision manufacturing, traffic infrastructures, data centers and the like. The Internet of things ammeter is used as terminal equipment of the intelligent power grid, remote data transmission is carried out between the WiFi, GPRS and Ethernet through the RS485 multiple connection modes and the network platform, the monitoring center can monitor the power utilization situation of a user through the network platform in real time, remote control is achieved, and more intelligent and more convenient power utilization management is provided for the user. In order to adapt to the smart grid, the Internet of things electric meter integrates intelligent functions of bidirectional multi-rate metering, user side control, bidirectional data communication in multiple data transmission modes, electricity larceny prevention and the like, and a professional high-performance Internet of things + electric meter is formed.
NB-IoT communication technology is an emerging technology in the field of wireless transmission, supporting cellular data connectivity for low power devices over a wide area network, also known as a Low Power Wide Area Network (LPWAN). The system can provide 10 thousands of connections under the bandwidth of 200kHz, has the characteristics of wide coverage, more connections, low speed, low cost, low power consumption, excellent architecture and the like, and is suitable for the Internet of things equipment which is not moved frequently. Therefore, the NB-IoT communication technology is applied to the Internet of things electricity meter, and the trend of the Internet of things electricity meter development is about.
Disclosure of Invention
In order to solve the problems of inaccurate electric energy metering, high power consumption and limited communication of the conventional electric meter, the invention provides a novel Internet of things electric meter, which has the following specific technical scheme:
the technical scheme includes that the electric meter comprises an internet of things electric meter and a network platform, the internet of things electric meter comprises a controller module, a power supply module, an NB-IoT communication module, a Flash storage module, a metering module, an RTC module, a display module, a switch module and a communication interface, a main processor module is connected with the Flash storage module, the RTC module and the metering module through a serial data port to realize metering and storage of real-time electric energy data, the internet of things electric meter performs data transmission and data interaction with the network platform through the NB-IoT communication module and the communication interface, and the network platform adopts a B/S mode to design and can access the electric energy data through a webpage and perform switching operation on and off the internet. This patent compares with other thing networking ammeter, through NB-IoT wireless data acquisition's mode, will some electric energy data remote transmission to server, and rethread network platform carries out data set and handles to can filter abnormal data, made things convenient for electric energy data's collection and processing.
Drawings
Fig. 1 is a schematic diagram of an electricity meter module of the internet of things.
Fig. 2 is a work flow chart of the internet of things electric meter and the network platform.
Detailed Description
To clearly illustrate the technical features of the present solution, the following further description is made with reference to fig. 1 and 2:
as shown in figure 1: an Internet of things electricity meter based on an NB-IoT communication technology comprises a controller module, a power supply module, an NB-IoT communication module, a Flash storage module, a metering module, an RTC module, a display module, a switch module and a communication interface; wherein:
a controller module for 1) on-chip integration of single-phase power metering, RTC clocks, LCD drivers and enhanced 8051 cores; 2) measuring active and reactive power and voltage and current effective values, and monitoring the voltage loss and zero crossing of the power line; 3) low voltage reset and low voltage detection functions;
the power supply module is used for providing power supply voltage, measurement voltage and low-voltage protection;
the NB-IoT communication module is used for deep and wide coverage type data communication;
the Flash storage module is used for data storage;
the metering module is used for calculating active power and active electric energy, reactive power and reactive electric energy, voltage and current effective values and frequency;
the RTC module is used for obtaining a real-time clock;
the display module is used for displaying the electric energy information of the electric meter;
the switch module is used for realizing switching-on and switching-off operations by utilizing pulse excitation;
the communication interface is used for manual meter reading and data verification.
The main controller in the Internet of things ammeter selects SH79F169B, and has the following main characteristics; 1) the functions of single-phase electric energy metering, RTC (real time clock), LCD (liquid crystal display) driver, enhanced 8051 core and the like are integrated on the chip; 2) the embedded electric energy metering module is used for metering active power, reactive power and voltage and current effective values and monitoring the characteristics of voltage loss, zero crossing and the like of a power line; 3) the device integrates resources such as 64 Kbyte Flash, 3072 byte RAM, 3 16-bit timers, 2-path 12-bit PWM output, 2 EUART, external interrupt INT1, ADC and the like; 4) the built-in PLL clock, the watchdog timer, the low voltage reset function and the low voltage detection function, and the SH79F169B also provide 2 low power consumption power-saving modes. It can be seen from the SH79F169B characteristic that it has higher processing frequency, powerful expansion function, and low power consumption, and is well suited to the requirements of the present design.
The NB-IoT communication module adopts a BC95 module, and the main characteristics are as follows; 1) in deep coverage, NB-IoT improves the gain by 20dB compared with LTE, and the coverage capability is improved by 100 times; 2) the mass connection is that the uplink capacity is improved by 50-100 times compared with that of 4G; 3) ultra-low power consumption, which introduces ultra-long DRX power saving technology and PSM power saving mode; 4) the volume is small and the weight is light; 5) and (3) communication stabilization: compared with the wired PLC meter reading data recovery success rate of about 60%, the NB-IoT can ensure that the successful data recovery rate reaches 99%. The BC95 module has the characteristics of wide coverage, low power consumption, stable communication, small volume, light weight and the like, and is suitable for remote data transmission.
The display module adopts a CN90C4S40 liquid crystal driving chip, the chip has the output capability of 160 points which is the total of 4COM and 40SEG, and is suitable for a liquid crystal screen in a character or graphic form with a common low duty ratio and for electric energy information display of an electric meter.
The switch module adopts a magnetic latching relay with 16A contact switching, and can realize the functions of opening and closing only by pulse excitation.
The power module provides power supply voltage and measuring voltage for the Internet of things ammeter and has a low-voltage protection function.
The RTC module is used for obtaining a real-time clock, and the ammeter records that the real-time clock can definitely record the electricity utilization condition in a certain time period on one hand, and is convenient for calculating the peak, valley and flat electricity prices on the other hand, and calculates the total amount of the electricity charge specifically consumed by the user.
The electric energy metering module comprises functions of calculating active power and active electric energy, reactive power and reactive electric energy, voltage and current effective values and frequency, and supports a flexible meter calibration scheme.
The communication interface adopts an RS-485 mode, and can be used for manual meter reading and data verification.
The working principle of the Internet of things ammeter is as follows: the electric energy metering module, the RTC module and the Flash storage module are used for real-time electric energy metering and storage, the LCD of the display module is used for displaying real-time electric energy data, and the NB-IoT communication module is used for transmitting the electric energy data to the network platform to complete the remote meter reading function. When the NB-IoT communication module receives a power-off and power-on command sent by the network platform, the switch module drives the relay to perform gate control.
The process of realizing electric energy data management by using the internet of things electric meter and the network platform is as follows as shown in the attached figure 2:
(1) logging in a network platform; (2) the state of the Internet of things ammeter inquiry submodule judges whether the state is abnormal or not; (3) if the Internet of things ammeter has no abnormality, the Internet of things ammeter inquires whether the current time meets the reporting condition; (4) if the reporting condition is met, the Internet of things ammeter performs real-time electric energy metering and storage through the electric energy metering module, the RTC module and the Flash storage module; (5) the data interaction is carried out between the NB-IoT communication module and the network platform, and the IoT electric meter receives the instruction downloaded by the network platform and correspondingly processes the instruction; (6) if the Internet of things ammeter is abnormal, actively reporting the abnormality to the network platform through the NB-IoT communication module; (7) if the report condition is not met, carrying out the anomaly detection again to wait for meeting the report condition.
Claims (6)
1. The Internet of things ammeter is characterized by comprising an Internet of things ammeter and a network platform, wherein the Internet of things ammeter comprises a controller module, a power supply module, an NB-IoT communication module, a Flash storage module, a metering module, an RTC module, a display module, a switch module and a communication interface, the controller module is connected with the Flash storage module, the RTC module and the metering module through serial data ports to realize metering and storage of real-time electric energy data, the Internet of things ammeter performs data transmission with the network platform through the NB-IoT communication module and the communication interface, and the network platform is designed in a B/S mode and can access the electric energy data through a webpage and perform switching operation on the Internet of things ammeter; wherein:
a controller module for 1) on-chip integration of single-phase power metering, RTC clocks, LCD drivers and enhanced 8051 cores; 2) measuring active and reactive power and voltage and current effective values, and monitoring the voltage loss and zero crossing of the power line; 3) low voltage reset and low voltage detection functions;
the power supply module is used for providing power supply voltage, measurement voltage and low-voltage protection;
the NB-IoT communication module is used for deep and wide coverage type data communication;
the Flash storage module is used for data storage;
the metering module is used for calculating active power and active electric energy, reactive power and reactive electric energy, voltage and current effective values and frequency;
the RTC module is used for obtaining a real-time clock;
the display module is used for displaying the electric energy information of the electric meter;
the switch module is used for realizing switching-on and switching-off operations by utilizing pulse excitation;
the communication interface is used for manual meter reading and data verification.
2. The NB-IoT communication technology based internet of things electricity meter in claim 1, wherein the controller module selects SH79F 169B.
3. The NB-IoT communication technology based internet of things electricity meter in claim 1, wherein the NB-IoT communication module employs BC 95.
4. The NB-IoT communication technology-based IOT (Internet of things) electric meter according to claim 1, wherein the display module is a CN90C4S40 liquid crystal driving chip.
5. The NB-IoT communication technology based internet of things electricity meter in claim 1, wherein RS-485 is selected as the communication interface.
6. The NB-IoT communication technology-based IOT electric meter according to claim 1, wherein the network platform comprises a data management system and a terminal control system, wherein the data management system manages electric energy data measured by the IOT electric meter; and the terminal control system controls the switching on and switching off of the Internet of things ammeter.
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| CN202010800352.0A CN111735999A (en) | 2020-08-11 | 2020-08-11 | Internet of things ammeter based on NB-IoT communication technology |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112710896A (en) * | 2020-12-24 | 2021-04-27 | 国网黑龙江省电力有限公司供电服务中心 | Multicore module smart metering ammeter |
| CN112802268A (en) * | 2021-01-06 | 2021-05-14 | 四川七特能创科技有限公司 | Method for calibrating meter desk |
| CN113625031A (en) * | 2021-08-23 | 2021-11-09 | 中国联合网络通信集团有限公司 | Intelligent electric meter terminal, MR data reporting system and method |
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| CN113625031A (en) * | 2021-08-23 | 2021-11-09 | 中国联合网络通信集团有限公司 | Intelligent electric meter terminal, MR data reporting system and method |
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