CN109752060A - A kind of intelligent gas meter based on embedded intelligent gas table function narrowband NB-IOT communication module group - Google Patents

A kind of intelligent gas meter based on embedded intelligent gas table function narrowband NB-IOT communication module group Download PDF

Info

Publication number
CN109752060A
CN109752060A CN201711062087.5A CN201711062087A CN109752060A CN 109752060 A CN109752060 A CN 109752060A CN 201711062087 A CN201711062087 A CN 201711062087A CN 109752060 A CN109752060 A CN 109752060A
Authority
CN
China
Prior art keywords
gas meter
intelligent gas
module
iot
narrowband
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201711062087.5A
Other languages
Chinese (zh)
Inventor
郑孚
初勇
张玉艳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liaoning Scaler Technology Co Ltd
Original Assignee
Liaoning Scaler Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Liaoning Scaler Technology Co Ltd filed Critical Liaoning Scaler Technology Co Ltd
Priority to CN201711062087.5A priority Critical patent/CN109752060A/en
Publication of CN109752060A publication Critical patent/CN109752060A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Abstract

Affix NB-IOT communication module constitutes intelligent gas meter on the intelligent gas meter control panel that the MCU micro energy lose processor of previous intelligent gas meter is constituted, bring the problems such as at high cost, structure is complicated, power consumption is big, by realizing the metering to intelligent gas meter, Communication Control using an ARM core inside NB-IOT modem.And inventing is a kind of by gas meter, flow meter mechanical counter, direct-reading program, pulse counter module and program, interface and program can be expanded, valve control module, ladder combustion gas valence accounting module, the thief-proof leakage coal gas detection secure smartcard module of originally combustion gas, originally fuel gas alarm connects message processing module, adverse current alarm module composition, data communication protocol module, data encryption module and program and NB-IOT communication function are integrated into the dedicated NB mould group of gas meter, flow meter of a chip one, the present invention has clear principle, with easy to use, it is low in energy consumption, it is small in size, the advantages that reliability is higher, it is at high cost existing for Intelligent gas meter based on internet of things for previous NB module composition, the problems such as power consumption is big is made that improvement.

Description

A kind of intelligence combustion based on embedded intelligent gas table function narrowband NB-IOT communication module group Gas meter
Technical field
The present invention relates to a kind of intelligent gas meters, more particularly to one kind based on embedded intelligent gas table function narrowband NB- The intelligent gas meter of IOT communication module group.
Background technique
The professional standard (R13, R14 a part) of NB-IOT was formulated in 3GPP meeting in 2016, and in release quotient in 2017 With NB mould group, and according to the 3GPP agreement of NB-IOT, traditional Internet of Things transmission using 2G net GPRS technology, due to its transmitting Power is big, and power consumption is big, and link operation is not high enough causes its area coverage narrow, and at high cost, power consumption is big, it is difficult to meet intelligent gas Table is powered using battery, the technical requirements of operation 10 years.
Problem above can solve using the narrowband NB-IOT communication die for special purpose group of intelligent gas meter in intelligent gas meter, This is a novel branch art and product, and at present both at home and abroad using NB-IOT module and traditional 2G GPRS communication module netted Application method is the same, only NB-IOT module is regarded communication component come using.In order to meet Intelligent gas meter based on internet of things, Ask power consumption smaller, the lower market demand of cost, need it is a kind of by intelligent gas table function be built in narrowband NB-IOT communication mould In group, communicated by pulse transducer gas meter, flow meter base table with the intelligent gas meter narrowband NB-IOT for embedding function with intelligent gas meter Mould group, the intelligent gas meter of composition.
Summary of the invention
It is an object of that present invention to provide a kind of intelligent gas meters using novel narrowband NB-IOT communication module group.Intelligent gas NB-IOT gas meter, flow meter die for special purpose group used by table is one in a kind of multiple MCU by inside NB-IOT modem MCU is defined as intelligent gas meter MCU, by gas metering and billing function module, counter direct-reading module, voltage detecting function mould Block, data storage function module, thief-proof functional module, real-time clock module, data ciphering and deciphering module, data-transformation facility Module etc. has fully embedded into above-mentioned module in NB-IOT module chip, the repertoire of intelligent gas meter is by NB-IOT chip Resource realize;In Intelligent gas meter based on internet of things just as an independent intelligent gas meter MCU, intelligent gas is realized Table repertoire, and NB-IOT communication function can be completed, the dedicated NB-IOT communication module group of intelligent gas meter is not necessarily in NB- Other attached MCU outside IOT communication module group, the object that the present invention solves present MCU intelligent control board and NB-IOT communication module group is constituted It networks intelligent gas meter, adds pulse transducer gas meter, flow meter base table or be made of direct-reading gas meter base table, it is at high cost, structure is multiple Miscellaneous, the problems such as power consumption is big, and battery is at high cost, cooperation high-precision gas meter, flow meter metering base table increase the accuracy of flow measurement.
A kind of intelligent gas meter for using narrowband NB-IOT communication module group, comprising: embedded intelligent gas table function Narrowband NB-IOT communication module group, pulse transducer gas meter, flow meter base table or direct-reading gas meter base table, lithium battery, NB-IOT antenna, Shell etc. is constituted.
The present invention is characterized in that intelligent gas meter uses, the narrowband NB-IOT of intelligent gas meter repertoire has been embedded Communication module group;The narrowband NB-IOT communication module group for wherein having embedded intelligent gas meter repertoire includes narrowband NB-IOT communication core In piece, repertoire needed for I/O interface, the program of program storage and the resources such as memory provide intelligent gas meter and Real-time clock;It adds, antenna, battery, pulse transducer, direct-reading sensor gas meter, flow meter and shell are constituted.Do not remove NB-IOT MCU outside communication module group.And when can carry out real-time time school to intelligent gas meter by backstage.
According to aforementioned feature of the invention, present invention is further characterized in that the I/O resource of intelligent gas meter, various function journeys Sequence, program storage, data storage and MCU soft and hardware resource all derive from NB-IOT communication module group.
It is of the invention to be further characterized in that intelligent gas meter in addition to NB-IOT communication module group without other according to preceding feature MCU。
It is of the invention to be further characterized in that embedded intelligent gas table function narrowband NB-IOT communication module group according to preceding feature The built-in real-time clock of intelligent gas meter.
It is of the invention to be further characterized in that real-time clock be verified automatically in each communication according to preceding feature, Guarantee the accuracy of real-time clock.
After the narrowband NB-IOT communication module group of intelligent gas meter powers on, module is first by NB modem, intelligent gas The correlation modules such as Table A RM, data storage function module and interface carry out initialization of energizing, and each module enters suspend mode shape after initialization State, when using photo-electronic directly reading gas meter, flow meter, after timer interruption time and real-time clock timer interruption are set, gauge outfit direct-reading Interface routine takes the data in mechanical direct read device, and the timer interruption time can also pass through program by wireless setting Initialization is configured;When using step-by-step counting gas meter, flow meter, program will start external interrupt detection mode, when receiving pulse When signal, program can be interrupted, and pass through the state computation flow of interruption.After obtaining flow, flow information timing is uploaded to The network platform, while dosage information can be stored in data memory module by data recording program, which can save one A month, after intelligent mould group data acquisition and storage, NB modem initialization program started to execute, and utilizes simultaneously Collected dosage information is uploaded to cloud platform by NB-IOT network.
Program is also respectively arranged the functions such as data upload, undervoltage warning, steal alarm, the alarm of extra small stream, adverse current alarm It interrupts, interruption can be modified event flag position, and interruption is jumped out after change according to flag bit and carries out relevant event action. Single-chip microcontroller first determines whether interrupt type when being interrupted wake-up, passes through again in which specific port initiation of judgement if it is external interrupt Disconnected, the event flag position of correlation function is arranged, principal function can complete corresponding Event Function according to flag bit after jumping out interruption, lead to The function of crossing external interrupt triggering mainly has a battery capacity detection function, gas meter, flow meter mechanical counter function, step-by-step counting function, When timer interruption occurs for program, according to certain time interval correlation function can be executed, compare and interrupt the time at moment and be It is no identical as the preset function time, the event flag position of correlation function is if the same set, and principal function can root after jumping out interruption Corresponding Event Function is completed according to flag bit, when the time reaching preset uplink time, NB-IOT modem is powered on, and holds Row initialization program, intelligent gas meter ARM core then communications protocol can pass through NB modem one data of upload to cloud From the background, the signal strength of the base station NB including intelligent NB gas meter, flow meter position is also sent to backstage, if Programmable detection When the abnormal phenomenon such as under-voltage out, adverse current, program will do it alarm and upload a data by NB-IOT modulation /demodulation module and mentions Wake up user, while system will do it the diagnosis of primary system internal state at regular intervals in timer interruption, and judgement is each Whether a functional unit normally starts, and whether each expansion mouth is applied, if there is abnormal, intelligence combustion occur in certain functional units Gas meter core can then communications protocol by NB modem upload a data to cloud backstage notify related personnel to tie up Operation is repaired, module enters dormant state and opening timing device if each functional unit normally starts, when module listens to NB base Module can be waken up when the wakeup time for the message or program setting that station is sent reaches, after mould group is waken up, Ge Gegong Make unit start-up operation, definition is transferred data to by Serial Port Line after wherein NB-IOT demodulation module demodulates signal When intelligent gas meter ARM carries out real-time clock school, valve control is carried out, the intelligent gas meter ARM extraction of definition needs stoichiometric number According to the data-interface for being transferred to NB modem, data are sent to NB modem, NB modulation /demodulation by data line The signal of output is sent to host computer through equipment such as wave filter duplexer switch antennas and parsed by device.
The beneficial effects of the present invention are: present invention utilizes the narrowband NB-IOT for having embedded intelligent gas meter repertoire is logical Interrogate mould group.The mould group be it is a kind of by gas meter, flow meter mechanical counter, direct-reading program, pulse counter module and program, interface can be expanded And program, valve control module, ladder combustion gas valence accounting module, the thief-proof leakage coal gas detection secure smartcard module of originally combustion gas, from Carry out fuel gas alarm and connects message processing module, adverse current alarm module composition, data communication protocol module, data encryption module and journey Sequence and NB-IOT communication function are integrated into the dedicated NB mould group of gas meter, flow meter of a chip one, and the present invention has clear principle, tool Have it is easy to use, it is low in energy consumption, small in size, the advantages that reliability is higher, all have for intelligent gas meter field stronger practical Meaning.By enhancing signal strength using NB-IOT dedicated antenna, the reliability of data transmission ensure that.It is high-precision by utilizing Degree gas meter, flow meter metering base table increases the accuracy of flow measurement.
Detailed description of the invention
Fig. 1 is structural block diagram of the invention
Fig. 2 is program flow diagram of the invention.
In Fig. 1: the narrowband NB-IOT communication module group 1 of embedded intelligent gas table function, electromechanical gas meter, flow meter measure base table 2, lithium Battery 3, NB-IOT antenna 4.
Specific embodiment
Electromechanical narrowband NB-IOT gas meter, flow meter metering base table 2 and pulse electrical signal is sent to embedded intelligent gas table function Communication module group 1, the pulse signal that the narrowband NB-IOT communication module group 1 of embedded intelligent gas table function will receive, is counted Processing, obtained continuous data if it is direct-reading gas meter direct-reading program reading mechanical counter data, realize function of measuring, Data are encrypted by data safety encrypting and decrypting functional module, are then parsed according to data command and content by each function Energy module, which executes, is packaged the instructions such as communications protocol, when needing to upload all data by embedding the narrow of intelligent gas table function Band NB-IOT communication module group 1 sends the data to server.The narrowband NB-IOT of embedded intelligent gas table function communicates mould simultaneously Charging accounting procedure, control field algorithms most in use are also embedded in group 1.Battery capacity detection function module interface, can use Program realization monitors the flow direction in gas meter, flow meter use process in real time, can issue nothing by NB module when there is reflux problem Line information, then the mobile client for proposing information warning and being pushed to user is handled by cloud.Embedded intelligent gas table function There are also ladder combustion gas valence billing function modules and program to use price at this originally combustion gas in narrowband NB-IOT communication module group 1 Ladder meterage is realized, it can be achieved that multiple groups progressive price scheme is, it can be achieved that positive ladder and negative ladder temporally, according to quantity etc. in ground; The narrowband NB-IOT communication module group 1 of NB-IOT antenna 4 and embedded intelligent gas table function embeds the narrowband of intelligent gas table function Data packing after NB-IOT communication module group 1 calculates acquisition is sent to base station by NB-IOT antenna 4.Lithium battery 3 and embedded The narrowband NB-IOT communication module group 1 of intelligent gas table function is connected to entire intelligent gas meter system power supply.
After intelligent gas meter powers on, module first will be in the narrowband NB-IOT communication module group 1 of embedded intelligent gas table function NB modem, intelligent gas meter ARM, the correlation modules such as data storage function module and interface carry out initialization of energizing, Each module enters dormant state after initialization, when using photo-electronic directly reading gas meter, flow meter, is arranged the timer interruption time, in timer Have no progeny, gauge outfit direct-reading interface routine takes the data in mechanical direct read device, the timer interruption time can by wireless setting, It can also be configured by program initialization;When using step-by-step counting gas meter, flow meter, program will start external interrupt detection mode, When receiving pulse signal, program can be interrupted, and pass through the state computation flow of interruption.After obtaining flow, flow is believed Breath timing is uploaded to the network platform, while dosage information can be stored in data memory module by data recording program, the letter Breath can save one month, and after intelligent mould group data acquisition and storage, NB modem initialization program starts to hold Row, while collected dosage information is uploaded to cloud platform using NB-IOT network.
Program is also respectively arranged the functions such as data upload, undervoltage warning, steal alarm, the alarm of extra small stream, adverse current alarm It interrupts, interruption can be modified event flag position, and interruption is jumped out after change according to flag bit and carries out relevant event action. Single-chip microcontroller first determines whether interrupt type when being interrupted wake-up, passes through again in which specific port initiation of judgement if it is external interrupt Disconnected, the event flag position of correlation function is arranged, principal function can complete corresponding Event Function according to flag bit after jumping out interruption.It is logical The function of crossing external interrupt triggering mainly has battery capacity detection function, gas meter, flow meter mechanical counter function, step-by-step counting function. When timer interruption occurs for program, according to certain time interval correlation function can be executed, compare and interrupt the time at moment and be It is no identical as the preset function time, the event flag position of correlation function is if the same set, and principal function can root after jumping out interruption Corresponding Event Function is completed according to flag bit.When the time reaching preset uplink time, NB-IOT modem is powered on, and holds Row initialization program, intelligent gas meter ARM core then communications protocol can pass through NB modem one data of upload to cloud From the background.The signal strength of the base station NB including intelligent NB gas meter, flow meter position is also sent to backstage.If Programmable detection When the abnormal phenomenon such as under-voltage out, adverse current, program will do it alarm and upload a data by NB-IOT modulation /demodulation module and mentions Wake up user.When receiving background information every time, calendar time information is contained in the information of receiving, it can be in intelligent gas meter Portion's clock is verified automatically, to guarantee the accuracy of intelligent gas meter calendar clock.Simultaneously in timer interruption every A period of time system will do it the diagnosis of primary system internal state, judge whether each functional unit normally starts, each expansion Whether mouth is applied.If there is exception occur in certain functional units, intelligent gas meter ARM core then communications protocol can pass through NB tune Modulator-demodulator uploads a data and notifies related personnel to repair operation to cloud backstage.If each functional unit normally starts Then module enters dormant state and opening timing device, when module listens to calling out for the message that the base station NB is sent or program setting Module can be waken up when the awake time reaches, and after mould group is waken up, each working cell is started to work, and wherein NB-IOT solves mode transfer Block transfers data to the intelligent gas meter ARM progress valve control of definition, definition by Serial Port Line after demodulating to signal Intelligent gas meter ARM extract the data-interface that calculative data are transferred to NB modem, data are passed through into data Line is sent to NB modem, and NB modem sends the signal of output through equipment such as wave filter duplexer switch antennas It is parsed to host computer.

Claims (5)

1. the narrowband NB-IOT for having embedded intelligent gas meter repertoire is logical the present invention is characterized in that intelligent gas meter uses Interrogate mould group;The narrowband NB-IOT communication module group for wherein having embedded intelligent gas meter repertoire includes narrowband NB-IOT communication chip Interior, repertoire and reality needed for the resources such as I/O interface, the program of program storage and memory provide intelligent gas meter Shi Shizhong;It adds, antenna, battery, pulse transducer, direct-reading sensor gas meter, flow meter and shell are constituted.Not except NB-IOT is logical Interrogate the MCU outside mould group.And when can carry out real-time time school to intelligent gas meter by backstage.
2. according to aforementioned feature of the invention, present invention is further characterized in that the I/O resource of intelligent gas meter, various function programs, The soft and hardware resource of program storage, data storage and MCU all derives from NB-IOT communication module group.
3. of the invention to be further characterized in that intelligent gas meter in addition to NB-IOT communication module group without other MCU according to preceding feature.
4. according to preceding feature, the embedded intelligent gas table function narrowband NB-IOT communication module group of the invention that is further characterized in that The built-in real-time clock of intelligent gas meter.
5. it is of the invention to be further characterized in that real-time clock be verified automatically in each communication according to preceding feature, it protects Demonstrate,prove the accuracy of real-time clock.
CN201711062087.5A 2017-11-02 2017-11-02 A kind of intelligent gas meter based on embedded intelligent gas table function narrowband NB-IOT communication module group Pending CN109752060A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711062087.5A CN109752060A (en) 2017-11-02 2017-11-02 A kind of intelligent gas meter based on embedded intelligent gas table function narrowband NB-IOT communication module group

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711062087.5A CN109752060A (en) 2017-11-02 2017-11-02 A kind of intelligent gas meter based on embedded intelligent gas table function narrowband NB-IOT communication module group

Publications (1)

Publication Number Publication Date
CN109752060A true CN109752060A (en) 2019-05-14

Family

ID=66398335

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711062087.5A Pending CN109752060A (en) 2017-11-02 2017-11-02 A kind of intelligent gas meter based on embedded intelligent gas table function narrowband NB-IOT communication module group

Country Status (1)

Country Link
CN (1) CN109752060A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110324732A (en) * 2019-07-02 2019-10-11 天津市裕民燃气表具有限公司 A kind of interactive system of NB-loT and intelligent gas meter
CN111080912A (en) * 2019-12-09 2020-04-28 浙江威星智能仪表股份有限公司 Internet of things gas meter prepayment logic system and method based on photoelectric direct reading information
CN111504427A (en) * 2020-05-27 2020-08-07 岳海民 Gas meter detecting method and gas meter using same
CN112235742A (en) * 2020-09-08 2021-01-15 深圳市燃气集团股份有限公司 Gas meter with NB-IoT communication module embedded with program and data processing method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203861198U (en) * 2013-12-09 2014-10-08 华北电力大学 Miner basic vital sign wireless monitoring system
CN105070022A (en) * 2015-08-31 2015-11-18 深圳市金博通科技有限公司 Meter end device and wireless meter reading system and method
CN205451458U (en) * 2016-03-22 2016-08-10 成都千嘉科技有限公司 Fuel gas metering device based on NB -IOT
CN106502960A (en) * 2016-10-09 2017-03-15 上海庆科信息技术有限公司 A kind of wireless communication chips encapsulated based on SIP
CN206019758U (en) * 2016-09-08 2017-03-15 成都千嘉科技有限公司 A kind of combustible gas metering arrangement based on LoRa
JP2017123622A (en) * 2016-01-08 2017-07-13 株式会社Nttドコモ User terminal, radio base station and radio communication method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203861198U (en) * 2013-12-09 2014-10-08 华北电力大学 Miner basic vital sign wireless monitoring system
CN105070022A (en) * 2015-08-31 2015-11-18 深圳市金博通科技有限公司 Meter end device and wireless meter reading system and method
JP2017123622A (en) * 2016-01-08 2017-07-13 株式会社Nttドコモ User terminal, radio base station and radio communication method
CN205451458U (en) * 2016-03-22 2016-08-10 成都千嘉科技有限公司 Fuel gas metering device based on NB -IOT
CN206019758U (en) * 2016-09-08 2017-03-15 成都千嘉科技有限公司 A kind of combustible gas metering arrangement based on LoRa
CN106502960A (en) * 2016-10-09 2017-03-15 上海庆科信息技术有限公司 A kind of wireless communication chips encapsulated based on SIP

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110324732A (en) * 2019-07-02 2019-10-11 天津市裕民燃气表具有限公司 A kind of interactive system of NB-loT and intelligent gas meter
CN111080912A (en) * 2019-12-09 2020-04-28 浙江威星智能仪表股份有限公司 Internet of things gas meter prepayment logic system and method based on photoelectric direct reading information
CN111080912B (en) * 2019-12-09 2021-07-16 浙江威星智能仪表股份有限公司 Internet of things gas meter prepayment logic system and method based on photoelectric direct reading information
CN111504427A (en) * 2020-05-27 2020-08-07 岳海民 Gas meter detecting method and gas meter using same
CN111504427B (en) * 2020-05-27 2021-10-22 岳海民 Gas meter detecting method and gas meter using same
CN112235742A (en) * 2020-09-08 2021-01-15 深圳市燃气集团股份有限公司 Gas meter with NB-IoT communication module embedded with program and data processing method

Similar Documents

Publication Publication Date Title
CN109752060A (en) A kind of intelligent gas meter based on embedded intelligent gas table function narrowband NB-IOT communication module group
CN109389757A (en) A kind of intelligent gas meter die for special purpose group based on NB-IOT modem
CN108170628A (en) A kind of water meter meter based on LORA communications
CN109520576A (en) A kind of NB mould group that ultrasonic water table function is embedded in NB-IOT modem chip
CN203561674U (en) Current monitoring device and anti-electricity-stealing load monitoring system
CN109798947A (en) A kind of narrowband NB-IOT communication module group and its application method for ultrasonic wave gas meter
CN202677594U (en) Watt-hour meter collector capable of initiatively reporting incidents
CN109427186A (en) A kind of intellectual water meter die for special purpose group based on NB-IOT modem
CN109754583A (en) A kind of Ultrasonic Intelligent water meter based on embedded Ultrasonic Intelligent water meter function narrowband NB-IOT communication module group
CN110648458A (en) Intelligent ultrasonic gas meter based on embedded intelligent ultrasonic gas meter function narrowband NB-IOT communication module
CN109724662A (en) A kind of intellectual water meter based on embedded intellectual water meter function narrowband NB-IOT communication module group
Kate et al. ZIGBEE based monitoring theft detection and automatic electricity meter reading
CN110160594A (en) A kind of NB-IoT mould group with intellectual water meter dedicated pin
CN109905857A (en) A kind of narrowband NB-IOT communication module group and its application method for intelligent gas meter
CN109470319A (en) A kind of NB-IOT mould group dedicated for Ultrasonic Intelligent water meter
CN110244548A (en) A kind of arrester on-Line Monitor Device based on GPS/ Beidou dual-mode time service
CN104881018B (en) Water paddy irrigation Water application rate for miniature irrigation area tests system and test method
CN109903467A (en) A kind of narrowband NB-IOT communication module group and its application method for intellectual water meter
CN103968964A (en) Remote temperature monitoring method for slurry fuel preparation
CN202434049U (en) Water meter data acquirer
CN109903539A (en) A kind of narrowband NB-IOT communication module group and its application method for ultrasonic water meter
CN207197567U (en) Forest fire protection well based on GPRS and single-chip microcomputer remotely monitors transmitting device
CN109470327A (en) A kind of NB-IoT mould group with Ultrasonic Intelligent gas meter, flow meter dedicated pin
CN201060514Y (en) Three-phase smart card type electric energy meter for farm irrigation
CN201965163U (en) Single-phase charge-controlled intelligent electric energy meter

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination