CN210072898U - Remote meter reading acquisition device based on NB-IoT and power supply system thereof - Google Patents

Abstract

The utility model discloses a remote meter reading acquisition device based on NB-IoT and a power supply system thereof, which comprises an intelligent meter, an acquisition device connected with the intelligent meter, an NB-IoT base station, an IoT core network and a service platform terminal; the acquisition device is connected with the service platform terminal through the NB-IoT base station and the IoT core network in sequence, the intelligent meter parameters acquired by the acquisition device are transmitted to the NB-IoT base station through the wireless transmission network for gathering, and the service platform terminal is connected through the IoT core network. The utility model provides a remote meter reading intelligent monitoring system based on NB-IoT wireless communication module that the energy consumption is low, transmission distance is far away, it adopts NB-IoT, is expected to solve the current thing networking standard problem that is not unified, the terminal is with high costs, the access ability is not enough.

Description

A remote meter reading collection device based on NB-IoT and its power supply system

technical field

The utility model belongs to the field of intelligent detection and monitoring, in particular to an NB-IoT-based remote meter reading collection device and a power supply system thereof.

Background technique

Smart cities are inseparable from the Internet, and the foundation of the Internet is the interconnection of data. The construction of "multi-meter integration" information collection and construction of a social utility terminal energy data collection and analysis platform is conducive to reducing the comprehensive operation cost of public utilities, realizing resource sharing and business interoperability, and effectively improving the overall service capability of the public sector. Intensive national and local policies have clearly stated that it is necessary to vigorously promote the "multi-meter integration" information collection work and closely link it with the construction of smart cities.

The communication system is the key to ensure the realization of the "multi-meter in one" acquisition system. An excellent communication system can realize good data information communication, thereby ensuring the smooth and high-quality completion of the data acquisition process. At this stage, the communication system construction technology applied in the "multi-meter-in-one" project presents a variety of characteristics, among which the most widely used mainly include the following. (1) M-BUS communication. This system is composed of a master, a slave and two communication cables. The slaves play their roles according to the control commands of the master. Using this system, it can ensure that the water meters, heat meters, and natural gas meters of the power users can obtain the power supply of the power system, and then realize the communication. However, in the process of application, due to the influence of its structural composition, field wiring needs to be carried out, the amount of engineering increases, and the later maintenance is more difficult. (2) RS-485 communication. Although this technology is basically similar to the M-BUS communication system in terms of principle and composition, it has both obvious advantages and obvious shortcomings. The advantages are mainly reflected in the high data transmission efficiency and long coverage distance, etc. The shortcomings are mainly reflected in: the communication system cannot provide power to various measuring instruments during the application process, so it is necessary to complete the independent power line connection operation, which to a certain extent The amount of work has also increased. (3) Micropower wireless communication. In the application process, the communication system only needs to transmit wireless signals with a power of no more than 50mW to the system, and the communication frequency band is within 470-510MHz. It can be seen that the system has a very small amount of engineering in the application process, and the efficiency of data transmission is also improved. ensure. However, since the communication signal is more likely to be interfered during the transmission process, the specific application range is severely limited. (4) Wireless public network communication. The system is based on the public network for packet wireless communication, so it is ideal in terms of coverage, applicability and transmission efficiency. However, considering that the coverage of public network operators is not comprehensive, and the operating cost of public network equipment is relatively high, using this system in practice may result in the loss of local information and an increase in input costs. (5) Power line carrier communication, the system is a four-meter-in-one communication based on power frequency power lines. Since the current power resources have been basically popularized, the use of this system to realize the integration of four meters can not only ensure the comprehensiveness and timeliness of the collected data, but also effectively reduce the construction investment. However, in the communication process of the system, the data transmission will be subject to electromagnetic interference, and the stability will be impacted, so the electromagnetic interference should be consciously optimized and processed in the application process. At present, in the "multi-meter-in-one" reconstruction project, the commonly used scheme is the power line carrier communication + micro-power wireless communication scheme.

The existing domestic and foreign experience in the "multi-meter-in-one" centralized acquisition and reconstruction project shows that the communication system is the bottleneck in the realization of the "multi-meter-in-one" acquisition system, and restricts the construction of smart cities. Cellular-based Narrow Band Internet of Things (NB-IoT) is an emerging technology in the field of IoT, which supports the cellular data connection of low-power devices in the wide area network, also known as low power wide area network (LPWA). Although it is an emerging technology, NB-IoT technology has developed rapidly and has become an important branch of the Internet of Everything. NB-IoT is built on a cellular network and only occupies a bandwidth of about 200KHz, and can be directly deployed on a GSM network, UMTS network or LTE network to reduce deployment costs and achieve smooth upgrades. NB-IoT supports efficient connection of devices with long standby time and high network connection requirements. NB-IoT devices are said to improve battery life by at least 10 years, while also providing very comprehensive coverage of indoor cellular data connections.

Meter reading requirements:

The scenarios of power meter reading are divided into user-side communication and distribution network communication systems. The frequency band of the power load monitoring system adopts 230MHz+1.8GHz TD-LTE private network. The remote meter reading of the user's electricity meter has adopted many technologies, including GPRS, 3G, LTE, PLC, Zigbee, 433MHz, etc. The target of the meter reading frequency is to collect and upload once every 15 minutes, 96 points per day, so as to realize the online monitoring of the power grid control.

Centralized meter reading is mainly used in concentrated places such as China, mainly including power optical fiber centralized reading and GPRS centralized reading (accounting for more than 50%), while scattered places such as Europe and the United States mainly use independent meter reading. Since electricity meter reading and power supply are not a problem, and the amount of data is relatively large, the urgent need for electricity meter reading to utilize NB-IoT has not yet been realized.

Water meter reading requirements:

It is estimated that in 2016, the number of smart water meters installed in the world will rise to 32.5 million, accounting for more than 30% of all water meters. At present, the installed ratio of smart water meters in China is only 15%, and the compound annual growth rate is expected to exceed 30% from 2016. The incremental market of water meters mostly adopts M-Bus bus communication. The stock market for water meters is an opportunity for wireless water meters. The construction of wireless water meters is simple. Due to the problems of power consumption, signal coverage and battery life, NB-IoT technology is urgently needed to solve practical problems.

Gas meter reading requirements:

The gas meter has high safety requirements, and the test time is 1-2 years. At this stage, gas meters have begun to use GPRS communication in large quantities, copying them once a week, and the annual tariff is about 6 yuan. At present, the cost of automatic meter reading is higher than the labor cost, but gas is faced with the problem of tiered pricing. Due to issues of power consumption, signal coverage and battery life, NB-IoT technology is urgently needed to solve real-world problems, but only if the security testing problem is solved.

Utility model content

Aiming at the deficiencies of the prior art, the utility model provides a remote meter reading intelligent monitoring system based on an NB-IoT wireless communication module with low energy consumption and long transmission distance. Unification, high terminal costs, and insufficient access capabilities.

The utility model is realized by the following technical solutions: an NB-IoT-based remote meter reading collection device and its power supply system, comprising a smart meter, a collection device connected with the smart meter, an NB-IoT base station, an IoT core network and a business platform terminal; the collection device is connected to the service platform terminal through the NB-IoT base station and the IoT core network in sequence, and the smart meter parameters collected by the collection device are transmitted to the NB-IoT base station through the wireless transmission network for aggregation, and the IoT core network Connect to the business platform terminal.

The acquisition device includes a power supply network access line on-off control module, an interface module, an optocoupler isolation module, a voltage sensor, a voltage monitoring module, a microcontroller module, an NB-IoT communication module, a clock module, a memory module, a power supply module and Voltage and current induction stabilization module, the interface module is connected to the optocoupler isolation module, the power supply network access line on-off control module, optocoupler isolation module, voltage sensor, NB-IoT communication module, clock module, memory module are respectively connected with the microcontroller module; the power supply module is respectively connected with the power supply network access line on-off control module, interface module, optocoupler isolation module, voltage sensor, microcontroller module, NB-IoT communication module, clock The module is connected with the memory module, and the power supply module is connected with the voltage and current induction and stabilization module at the same time.

The power supply network access line on-off control module is used to connect or disconnect the smart meter and the power supply network;

The interface module is used to obtain the data parameters of the smart meter;

The optocoupler isolation module is used to isolate the influence caused by the harsh environment;

the microcontroller module, for processing the data parameters of the smart meter uploaded by the interface module;

The voltage sensor is used to detect the smart meter voltage and transmit it to the microcontroller module;

The voltage monitoring module is used for monitoring and recording the voltage data in the voltage sensor;

The clock module is used to record time;

The memory module is used to store the collected data parameters of the smart meter;

The NB-IoT communication module is used for uploading the data parameters of the smart meter uploaded by the interface module to the NB-IoT base station for aggregation, and then uploading to the server center;

The power supply module is used to provide the power required by the power supply network access line on-off control module, interface module, optocoupler isolation module, voltage sensor, microcontroller module, NB-IoT communication module, clock module, and memory module ;

The voltage and current induction and stabilization module is used for inducing and stabilizing the voltage and current of the power supply module.

The power supply module includes a flyback switching power supply and a charge and discharge control module connected to it; the flyback switching power supply is used to convert the commercial power into low-voltage direct current to charge the battery; the charge and discharge control module is used to charge the battery in real time charge and discharge control.

Compared with the prior art, the beneficial effects of the present utility model are:

1. The utility model adopts the NB-IoT wireless communication module to carry out the collection of smart electricity meters, smart water meters, smart gas meters and three-in-one meters, and its NB-IoT technology has the advantages of deep coverage, massive connections, ultra-low power consumption and low cost. The big advantage is that in terms of satisfying underground communication, unifying multi-meter communication protocols, increasing transmission rate and expanding communication capacity, the "multi-meter-in-one" integrated reading based on NB-IoT technology can cancel various relay equipment and carry out underground management. Network communication, simplify communication protocols, reduce operation and maintenance costs, reduce installation space, provide smart water, smart gas, smart power supply, and provide remote meter reading and measurement data, thereby better providing services for smart city construction;

2. The acquisition device of the present utility model comprises a clock module, a memory module, a display module, and a button module, which effectively stores and displays the collected data in real time, which is convenient for users and managers to query in real time, and effectively ensures the security of the data;

3. The present invention adopts the optocoupler isolation module, which effectively isolates the signal at the same time when the signal is collected due to the harsh environment in the industrial site;

4. The utility model can measure the voltage of the smart meter, provide the basis for voltage regulation, and is convenient to adjust the power supply voltage in the region where the voltage is high or low;

5. The utility model monitors and records the voltage data in the voltage sensor in real time through the voltage monitoring module, and the situation can be dealt with in time;

6. The present invention senses and stabilizes the voltage and current of the power supply module in real time through the voltage and current sensing and stabilization module, thereby improving the stability of the power supply module.

Description of drawings

Fig. 1 is the structural principle diagram of the remote meter reading intelligent monitoring system based on the NB-IoT wireless communication module of the present invention;

Fig. 2 is the structural principle diagram of the collecting device of the present invention;

FIG. 3 is a schematic diagram of the specific structure of the collecting device of the present invention.

In the attached drawings: 1. Smart meter; 2. Acquisition device; 21. On-off control module of power supply network access line; 22. Interface module; 23. Optocoupler isolation module; 24. Voltage sensor; 25. Voltage monitoring module; 26 27. NB-IoT communication module; 28. Clock module; 29. Memory module; 210. Power supply module; 211. Voltage and current induction stabilization module; 2101. Flyback switching power supply; 2102. Charge and discharge control module; 3. NB-IoT base station; 4. IoT core network; 5. Service platform terminal.

Detailed ways

As shown in FIGS. 1 to 3 in the accompanying drawings, an NB-IoT-based remote meter reading collection device and its power supply system include a smart meter 1, a collection device 2 connected to the smart meter 1, and an NB-IoT base station 3 , IoT core network 4 and service platform terminal 5; the collection device 2 connects to the service platform terminal 5 through the NB-IoT base station 3 and IoT core network 4 in turn, and the smart meter 1 parameters collected by the collection device 2 are transmitted to the NB-IoT through the wireless transmission network The base station 3 collects and connects to the service platform terminal 5 via the IoT core network 4 .

The acquisition device 2 includes a power supply network access line on-off control module 21 , an interface module 22 , an optocoupler isolation module 23 , a voltage sensor 24 , a voltage monitoring module 25 , a microcontroller module 26 , an NB-IoT communication module 27 , and a clock module 28 , memory module 29, power supply module 210 and voltage and current induction stabilization module 211, interface module 22 is connected to optocoupler isolation module 23, power supply network access line on-off control module 21, optocoupler isolation module 23, voltage sensor 24, NB-IoT The communication module 27, the clock module 28 and the memory module 29 are respectively connected with the microcontroller module 26; the power supply module 210 is respectively connected with the power supply network access line on-off control module 21, the interface module 22, the optocoupler isolation module 23, the voltage sensor 24, The microcontroller module 26 , the NB-IoT communication module 27 , the clock module 28 and the memory module 29 are connected, and the power supply module 210 is connected to the voltage and current sensing and stabilization module 211 .

The power supply network access line on-off control module 21 is used to connect or disconnect the smart meter and the power supply network;

The interface module 22 is used to obtain the data parameters of the smart meter;

The optocoupler isolation module 23 is used to isolate the influence caused by the harsh environment;

The microcontroller module 26 is used to process the data parameters of the smart meter 1 uploaded by the interface module 22;

The voltage sensor 24 is used to detect the smart meter voltage and transmit it to the microcontroller module 26;

The voltage monitoring module 25 is used for monitoring and recording the voltage data in the voltage sensor 24;

The clock module 28 is used to record time;

The memory module 29 is used to store the collected data parameters of the smart meter 1;

The NB-IoT communication module 27 is used to upload the data parameters of the smart meter 1 uploaded by the interface module 22 to the NB-IoT base station 3 for aggregation, and then upload to the server center;

The power supply module 210 is used to provide the power supply network access line on-off control module 21, interface module 22, optocoupler isolation module 23, voltage sensor 24, microcontroller module 26, NB-IoT communication module 27, clock module 28, memory The electrical energy required by the module 29;

The voltage and current sensing and stabilization module 211 is used for sensing and stabilizing the voltage and current of the power supply module 210 .

The power supply module 210 includes a flyback switching power supply 2101 and a charge and discharge control module 2102 connected to it; the flyback switching power supply 2101 is used to convert the commercial power into low-voltage direct current to charge the battery; the charge and discharge control module 2102 is used to charge the battery in real time. Charge and discharge are controlled.

The utility model provides a remote meter reading intelligent monitoring system based on the NB-IoT wireless communication module, which has low energy consumption and long transmission distance, and adopts NB-IoT, which is expected to solve the problem of non-uniform standards of the current Internet of Things, high terminal costs, and high connection costs. The problem of insufficient entry capacity.

To sum up, it is only a preferred embodiment of the present invention, and is not used to limit the scope of the present invention. All shapes, structures, features and spirits described in the scope of the claims of the present invention are equal Changes and modifications should be included within the scope of the claims of the present invention.

Claims (4)

1. The utility model provides a long-range collection system that checks meter and power supply system based on NB-IoT which characterized in that: the system comprises an intelligent meter (1), a collection device (2) connected with the intelligent meter (1), an NB-IoT base station (3), an IoT core network (4) and a service platform terminal (5); the acquisition device (2) is connected with the service platform terminal (5) through the NB-IoT base station (3) and the IoT core network (4) in sequence, the parameters of the intelligent meter (1) acquired by the acquisition device (2) are transmitted to the NB-IoT base station (3) through a wireless transmission network for gathering, and are connected with the service platform terminal (5) through the IoT core network (4).

2. The NB-IoT based remote meter reading collection device and the power supply system thereof as claimed in claim 1, wherein: the acquisition device (2) comprises a power supply network access line on-off control module (21), an interface module (22), an optical coupling isolation module (23), a voltage sensor (24), a voltage monitoring module (25), a microcontroller module (26), an NB-IoT communication module (27), a clock module (28), a memory module (29), a power supply module (210) and a voltage and current induction stabilization module (211), wherein the interface module (22) is connected with the optical coupling isolation module (23), and the power supply network access line on-off control module (21), the optical coupling isolation module (23), the voltage sensor (24), the NB-IoT communication module (27), the clock module (28) and the memory module (29) are respectively connected with the microcontroller module (26); the power supply system is characterized in that the power supply module (210) is respectively connected with the power supply network access line on-off control module (21), the interface module (22), the optical coupling isolation module (23), the voltage sensor (24), the microcontroller module (26), the NB-IoT communication module (27), the clock module (28) and the memory module (29), and meanwhile, the power supply module (210) is connected with the voltage and current induction stabilizing module (211).

3. The NB-IoT based remote meter reading collection device and the power supply system thereof as claimed in claim 2, wherein: the power supply network access line on-off control module (21) is used for connecting or disconnecting the intelligent meter and the power supply network;

the interface module (22) is used for acquiring data parameters of the intelligent meter;

the optical coupling isolation module (23) is used for isolating the influence caused by severe environment;

the microcontroller module (26) is used for processing the data parameters of the intelligent meter (1) uploaded by the interface module (22);

the voltage sensor (24) is used for detecting the voltage of the intelligent meter and transmitting the voltage to the microcontroller module (26);

the voltage monitoring module (25) is used for monitoring and recording voltage data in the voltage sensor (24);

the clock module (28) is used for recording time;

the memory module (29) is used for storing the acquired data parameters of the intelligent meter (1);

the NB-IoT communication module (27) is used for uploading the data parameters of the intelligent meter (1) uploaded by the interface module (22) to the NB-IoT base station (3) for summarizing and further uploading to a server center;

the power supply module (210) is used for providing electric energy required by the power supply network access line on-off control module (21), the interface module (22), the optical coupling isolation module (23), the voltage sensor (24), the microcontroller module (26), the NB-IoT communication module (27), the clock module (28) and the memory module (29);

the voltage and current sensing and stabilizing module (211) is used for sensing and stabilizing the voltage and the current of the power supply module (210).

4. The NB-IoT based remote meter reading collection device and the power supply system thereof as claimed in claim 2, wherein: the power supply module (210) comprises a flyback switching power supply (2101) and a charge and discharge control module (2102) connected with the flyback switching power supply; the flyback switching power supply (2101) is used for converting commercial power into low-voltage direct current to charge a storage battery; the charge and discharge control module (2102) is used for controlling charge and discharge of the storage battery in real time.

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