CN114710762A - Water meter low-power consumption and rapid instruction response system based on NBIOT (network-based input/output) Internet of things - Google Patents
Water meter low-power consumption and rapid instruction response system based on NBIOT (network-based input/output) Internet of things Download PDFInfo
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- CN114710762A CN114710762A CN202210398334.3A CN202210398334A CN114710762A CN 114710762 A CN114710762 A CN 114710762A CN 202210398334 A CN202210398334 A CN 202210398334A CN 114710762 A CN114710762 A CN 114710762A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F15/00—Coin-freed apparatus with meter-controlled dispensing of liquid, gas or electricity
- G07F15/06—Coin-freed apparatus with meter-controlled dispensing of liquid, gas or electricity with means for prepaying basic charges, e.g. rent for meters
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16Y—INFORMATION AND COMMUNICATION TECHNOLOGY SPECIALLY ADAPTED FOR THE INTERNET OF THINGS [IoT]
- G16Y10/00—Economic sectors
- G16Y10/35—Utilities, e.g. electricity, gas or water
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16Y—INFORMATION AND COMMUNICATION TECHNOLOGY SPECIALLY ADAPTED FOR THE INTERNET OF THINGS [IoT]
- G16Y40/00—IoT characterised by the purpose of the information processing
- G16Y40/10—Detection; Monitoring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/40—Arrangements in telecontrol or telemetry systems using a wireless architecture
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/60—Arrangements in telecontrol or telemetry systems for transmitting utility meters data, i.e. transmission of data from the reader of the utility meter
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a low-power-consumption and rapid instruction response system of an Internet of things water meter based on NBIOT (negative-bias input/output technology), which comprises a water meter user terminal, a cloud server and a water supply enterprise terminal, wherein the cloud server provides data communication service for the water meter user terminal and the water supply enterprise terminal, and the water meter user terminal is arranged on the NBIOT water meter; the invention switches the water meter to report high-frequency data or low-frequency data by arranging the high-low frequency switching unit, can quickly and timely respond after a user charges, meets the requirement of responding to a water meter valve opening instruction within 1 hour, meets the requirement of quickly responding to the user instruction while meeting the requirement of low power consumption of the NBIOT Internet of things water meter, regularly detects the running data of the water meter by the data monitoring module, and performs data analysis on the running data detected by the data monitoring module by the data analysis module, thereby facilitating maintenance and operation personnel to find the abnormality of the NBIOT Internet of things water meter in time and track and process the abnormality in time.
Description
Technical Field
The invention relates to the technical field of water meters, in particular to a NBIOT (network-based input/output) Internet of things-based water meter low-power consumption and rapid instruction response system.
Background
Most of the existing water meters adopt a manual meter reading mode, the labor cost and the management cost rise year by year, and human error risks, along with the gradual development of the technology of the Internet of things, the water meter and meter reading industry gradually changes the traditional mechanical water meter and manual meter reading into the wireless transmission and information automatic meter reading of remote information of the Internet of things, the NBIOT internet of things water meter is an intelligent water meter for remote meter reading and control, the water meter has the valve control function, can adapt to various environments and intelligent meter reading management, is suitable for residential and industrial agriculture, has constantly changing water supply management requirements, the water meter management system has the advantages that the water consumption condition of the water meter can be conveniently controlled by the door of the management department, remote meter reading and control become convenient and reliable, and the production benefit is effectively improved while manpower, material resources and financial resources are saved.
Most of the existing NBIOT Internet of things water meter instruction response management systems have single function, can not meet the requirement of low power consumption of the NBIOT Internet of things water meter and the requirement of quick response of a user instruction, when the user arrears to stop water, if the NBIOT water meter is always in a low power consumption state, the user can not respond in time after recharging and paying the fee, therefore, the water supply can not be recovered for the user in time, if the NBIOT internet of things water meter is in a state of responding to the instruction at any time, although the water supply can be recovered in time after the payment of the user, the power consumption of the water meter can be increased, thereby reducing the service life of the battery of the NBIOT Internet of things water meter, in addition, the existing NBIOT Internet of things water meter can not find and process faults occurring in operation in time, therefore, inconvenience is brought to water consumption of users, and the use is inconvenient, so that the invention provides a low-power consumption and quick instruction response system based on the NBIOT water meter to solve the problems in the prior art.
Disclosure of Invention
In view of the above problems, the invention aims to provide a low-power consumption and rapid instruction response system for a water meter based on an NBIOT (network control input/output) Internet of things, which switches the water meter to report high-frequency data or low-frequency data by arranging a high-low frequency switching unit, can quickly respond in time after a user charges the water meter, meets the requirement of responding to a water meter valve opening instruction within 1 hour, and solves the problem that the NBIOT Internet of things water meter instruction response management system cannot give consideration to the low-power consumption requirement of the NBIOT Internet of things water meter and the rapid instruction response requirement of the user.
In order to realize the purpose of the invention, the invention is realized by the following technical scheme: a NBIOT-based low-power consumption and rapid instruction response system of a water meter comprises a water meter user terminal, a cloud server and a water supply enterprise terminal, the cloud server provides data communication service for a water meter user terminal and a water supply enterprise terminal, the water meter user terminal is arranged on the NBIOT water meter, the water meter user terminal comprises a first wireless communication module in wireless communication connection with the cloud server, a data reporting module for reporting water meter data, a valve control module for controlling the electric control valve, a state switching module for switching a data reporting state, a data monitoring module for monitoring the water meter and an information acquisition module, the data reporting module comprises a low-frequency reporting unit for reporting data every 24 hours, a high-frequency reporting unit for reporting data every 1 hour, a timing unit for data reporting and timing and a high-low frequency switching unit for switching a data reporting mode;
the water supply enterprise terminal comprises a second wireless communication module connected with the cloud server in a wireless communication mode, a charging module used for recording user payment, an instruction issuing module used for issuing instructions to the valve control module, a data analysis module used for analyzing monitoring data and a database module, wherein the charging module comprises a payment recording unit used for recording payment information and an arrearage recording unit used for recording arrearage information, and the instruction issuing module comprises an instruction sending unit used for issuing an instruction of switching the valve and an arrearage prompting unit used for sending arrearage prompting information.
The further improvement lies in that: the information acquisition module acquires water meter information and water meter user information of a water meter user terminal and sends the acquired information to the database module of the water supply enterprise terminal, and the database module stores the received water meter information and water meter user information and provides information support for the charging module.
The further improvement lies in that: the arrearage recording unit records that the user owes time and drives the instruction sending unit to send a valve closing instruction to the valve control module, and simultaneously drives the arrearage prompting unit to send arrearage prompting information to the arrearage user, the valve control module receives the electric control valve of the control water meter after the valve closing instruction and closes, and drives the high-low frequency switching unit to switch the high-frequency reporting unit to report data to the water supply enterprise terminal every 1 hour within 24 hours.
The further improvement lies in that: the payment recording unit records that the user pays the fee, the driving instruction sending unit sends a valve opening instruction to the valve control module, the valve control module receives the valve opening instruction and then controls an electric control valve of the water meter to be opened, and the high-low frequency switching unit is driven to switch the low-frequency reporting unit to report data to the water supply enterprise terminal every 24 hours.
The further improvement is that: the data analysis module carries out data analysis on the operation data detected by the data monitoring module and displays the real-time operation state of the water meter to the water supply enterprise terminal in a graphical diagram form.
The further improvement lies in that: the low-frequency reporting unit and the high-frequency reporting unit are connected with corresponding status indicator lamps, the water meter user terminal further comprises a forced reporting module and a power supply module, the forced reporting module is driven by a forced reporting button on the water meter, and the power supply module supplies power to the water meter.
The further improvement is that: the forced reporting module is connected with the high-low frequency switching unit and is used for forcibly switching the high-frequency reporting unit to report data to the water supply enterprise terminal every 1 hour when the user needs the high-frequency reporting unit.
The further improvement lies in that: the power supply module is a lithium battery, the lithium battery is detachably mounted in the water meter and supplies power to the water meter, and the static working current of the system is maintained at 0.015 mA.
The beneficial effects of the invention are as follows: the invention switches the water meter to report high frequency data or low frequency data by arranging the high and low frequency switching unit, reports once per hour within 24 hours after the water meter is defaulted and closes the valve so as to detect whether an instruction is issued, recovers to a low frequency reporting state after exceeding 24 hours, can quickly respond in time after a user charges, meets the requirement of responding to a water meter valve opening instruction within 1 hour, meets the requirement of quickly responding to the user instruction while meeting the requirement of low power consumption of the NBIOT Internet of things water meter, ensures the normal water use of the user while ensuring the low power consumption, regularly detects the operation data of the water meter by the data monitoring module, performs data analysis on the operation data detected by the data monitoring module by the data analysis module, and displays the real-time operation state of the water meter to a water supply enterprise terminal in a graphical chart form, thereby facilitating maintenance and operation personnel to find abnormality of the NBIOT water meter in time and track the water meter, further ensuring the convenience of water consumption of users.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic system structure according to a first embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
Referring to fig. 1, the embodiment provides a low power consumption and fast instruction response system of a NBIOT internet-of-things-based water meter, which includes a water meter user terminal, a cloud server and a water supply enterprise terminal, wherein the cloud server provides data communication service for the water meter user terminal and the water supply enterprise terminal, the water meter user terminal is disposed on the NBIOT internet-of-things water meter, the water meter user terminal includes a first wireless communication module in wireless communication connection with the cloud server, a data reporting module for reporting water meter data, a valve control module for controlling an electric control valve, a state switching module for switching a data reporting state, a data monitoring module for monitoring the water meter, and an information acquisition module, the data reporting module includes a low frequency reporting unit for reporting data every 24 hours, a high frequency reporting unit for reporting data every 1 hour, a timing unit for data reporting and a high and low frequency switching unit for switching a data reporting mode, the water meters are switched by the high-frequency and low-frequency switching unit to report high-frequency data or low-frequency data, so that the low-power consumption requirement of the NBIOT (network-based on Internet of things) water meters can be met, and the requirement of quick response of user instructions can be met;
the water supply enterprise terminal includes the second wireless communication module who is connected with high in the clouds server wireless communication, a charging module for recording the user and collect fee, an instruction that is used for assigning the instruction to valve control module assigns the module, a data analysis module and a database module for analyzing monitoring data, charging module is including the arrearage record unit that is used for the record to collect fee the information collect fee record unit and is used for recording arrearage information, the instruction is assigned the module and is sent the arrearage suggestion unit including the instruction sending unit that is used for assigning the switch valve instruction and is used for sending arrearage suggestion information, arrearage suggestion information is sent to the user through arrearage suggestion unit, thereby be convenient for the user in time to know the arrearage condition.
The information acquisition module collects water meter information and water meter user information of the water meter user terminal and sends the collected information to the database module of the water supply enterprise terminal, the database module stores the received water meter information and water meter user information and provides information support for the charging module, the information support is provided for the water supply enterprise terminal through the acquisition of the water meter information and the water meter user information, and the water supply enterprise can conveniently perform water meter maintenance, water fee payment promotion and other work on users.
The arrearage recording unit records that a user owes time and drives the instruction sending unit to send a valve closing instruction to the valve control module, meanwhile, the arrearage prompting unit is driven to send arrearage prompting information to the arrearage user, the valve control module receives the valve closing instruction and then controls an electric control valve of the water meter to be closed, the high-low frequency switching unit is driven to switch the high-frequency reporting unit to report data to the water supply enterprise terminal every 1 hour within 24 hours, and the water supply enterprise terminal is reported data every 1 hour within 24 hours, so that the user can obtain quick response of a valve opening instruction after water charge is recharged.
The payment recording unit records that the user pays the fee, the driving instruction sending unit sends a valve opening instruction to the valve control module, the valve control module controls an electric control valve of the water meter to be opened after receiving the valve opening instruction, and drives the high-frequency and low-frequency switching unit to switch the low-frequency reporting unit to report data to the water supply enterprise terminal every 24 hours, so that the water meter is kept in a low-power consumption state continuously under the condition that the user cannot pay the fee in time, and the service life of the water meter is prolonged.
The data monitoring module detects the running data of the water meter at regular time, the data analysis module carries out data analysis on the running data detected by the data monitoring module, and displays the real-time running state of the water meter to the terminal of the water supply enterprise in a graphical diagram form, so that the related staff of the water supply enterprise can know the running condition of the water meter in time and process the emergency in time.
The low-frequency reporting unit and the high-frequency reporting unit are connected with corresponding status indicator lamps, the water meter user terminal further comprises a forced reporting module and a power supply module, the forced reporting module is driven by a forced reporting button on the water meter, and the power supply module supplies power to the water meter.
The forced reporting module is connected with the high-low frequency switching unit and is used for forcibly switching the high-frequency reporting unit to report data to the water supply enterprise terminal every 1 hour when a user needs the high-frequency reporting unit, so that the water meter is forced to report data when the user needs water urgently after recharging, and a recharging opening instruction is obtained in time.
The power supply module is a lithium battery, the lithium battery is detachably mounted in the water meter and supplies power to the water meter, and the static working current of the system is maintained at 0.015mA to achieve the effect of low power consumption.
Example two
The embodiment provides a water meter low-power consumption and quick instruction response system based on NBIOT internet of things, a water meter user terminal further comprises a self-checking module, a water supply enterprise terminal further comprises an alarm module, the water meter user terminal automatically inspects the water meter through the self-checking module and reports faults such as positive and negative alternate rotation and heartbeat (regular jumping rotation of the water meter) of the water meter, alarm information is sent to the alarm module when the fault is inspected, the alarm module automatically alarms, the inspection result of the self-checking module forms daily inspection report charted report analysis display data at the water supply enterprise terminal, and operators on duty know the running condition of corresponding water meter equipment through the inspection result, so that operation and maintenance personnel can quickly solve the fault problem to the site of the fault water meter, and automation and intelligent management are realized.
When the water charge of a user is owed, the NBIOT-based water meter low-power consumption and rapid instruction response system records the arrearage of the user by using an arrearage recording unit, drives an instruction sending unit to generate a valve closing instruction, simultaneously sends arrearage prompting information to the arrearage user by using an arrearage prompting unit, the instruction sending unit sends a valve closing instruction to a valve control module by using a second wireless communication module, a cloud server and a first wireless communication module, the valve control module receives the valve closing instruction and then controls an electric control valve of the water meter to be closed, drives a high-frequency and low-frequency switching unit to switch a high-frequency reporting unit to report data to a water supply enterprise terminal every 1 hour within 24 hours, so that the system is in a high-power consumption state within 24 hours, and drives the instruction sending unit to send a valve opening instruction to the valve control module if the user completes payment for the arrearage water charge within 24 hours, the payment recording unit can record the payment for the user to pay the payment, the valve control module controls an electric control valve of the water meter to be opened after receiving the valve opening instruction, drives the high-low frequency switching unit to switch the low frequency reporting unit to report data to the water supply enterprise terminal every 24 hours, so that the system is in a conventional low-power consumption state (more than 90% of users can perform recharging operation within 24 hours after obtaining that the users close the valve due to defaulting, and then receive an instruction of successfully opening the valve after recharging within 1 hour at the longest time), and if the users pay the defaulting water fee within 24 hours, the high-frequency and low-frequency switching unit still switches the low-frequency reporting unit to report data to the water supply enterprise terminal every 24 hours, and at the moment, the user can drive the forced reporting module to forcibly switch the high-frequency reporting unit to report data to the water supply enterprise terminal every 1 hour through the forced reporting button on the water meter, so that the user can obtain the response of opening the water meter after recharging.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. Based on NBIOT thing networking water gauge low-power consumption and quick instruction response system, its characterized in that: the NBIOT Internet of things water meter comprises a water meter user terminal, a cloud server and a water supply enterprise terminal, wherein the cloud server provides data communication service for the water meter user terminal and the water supply enterprise terminal, the water meter user terminal is arranged on the NBIOT Internet of things water meter and comprises a first wireless communication module in wireless communication connection with the cloud server, a data reporting module for reporting water meter data, a valve control module for controlling an electric control valve, a state switching module for switching a data reporting state, a data monitoring module for monitoring the water meter and an information acquisition module, the data reporting module comprises a low-frequency reporting unit for reporting data every 24 hours, a high-frequency reporting unit for reporting data every 1 hour, a timing unit for reporting data and timing, and a high-low-frequency switching unit for switching a data reporting mode;
the water supply enterprise terminal comprises a second wireless communication module connected with the cloud server in a wireless communication mode, a charging module used for recording user payment, an instruction issuing module used for issuing instructions to the valve control module, a data analysis module used for analyzing monitoring data and a database module, wherein the charging module comprises a payment recording unit used for recording payment information and an arrearage recording unit used for recording arrearage information, and the instruction issuing module comprises an instruction sending unit used for issuing an instruction of switching the valve and an arrearage prompting unit used for sending arrearage prompting information.
2. The NBIOT-based Internet of things water meter low-power consumption and rapid instruction response system of claim 1, wherein: the information acquisition module acquires water meter information and water meter user information of a water meter user terminal and sends the acquired information to the database module of the water supply enterprise terminal, and the database module stores the received water meter information and water meter user information and provides information support for the charging module.
3. The NBIOT-based Internet of things water meter low-power consumption and rapid instruction response system of claim 1, wherein: the arrearage recording unit records that the user owes time and drives the instruction sending unit to send a valve closing instruction to the valve control module, and simultaneously drives the arrearage prompting unit to send arrearage prompting information to the arrearage user, the valve control module receives the electric control valve of the control water meter after the valve closing instruction and closes, and drives the high-low frequency switching unit to switch the high-frequency reporting unit to report data to the water supply enterprise terminal every 1 hour within 24 hours.
4. The NBIOT-based Internet of things water meter low-power consumption and rapid instruction response system of claim 1, wherein: the payment recording unit records that the user pays the fee, the driving instruction sending unit sends a valve opening instruction to the valve control module, the valve control module receives the valve opening instruction and then controls an electric control valve of the water meter to be opened, and the high-low frequency switching unit is driven to switch the low-frequency reporting unit to report data to the water supply enterprise terminal every 24 hours.
5. The NBIOT-based Internet of things water meter low-power consumption and rapid instruction response system of claim 1, wherein: the data analysis module carries out data analysis on the operation data detected by the data monitoring module and displays the real-time operation state of the water meter to the water supply enterprise terminal in a graphical chart form.
6. The NBIOT-based Internet of things water meter low-power consumption and rapid instruction response system of claim 1, wherein: the low-frequency reporting unit and the high-frequency reporting unit are connected with corresponding status indicator lamps, the water meter user terminal further comprises a forced reporting module and a power supply module, the forced reporting module is driven by a forced reporting button on the water meter, and the power supply module supplies power to the water meter.
7. The NBIOT-based Internet of things water meter low-power consumption and rapid command response system of claim 6, wherein: the forced reporting module is connected with the high-low frequency switching unit and is used for forcibly switching the high-frequency reporting unit to report data to the water supply enterprise terminal every 1 hour when the user needs the high-frequency reporting unit.
8. The NBIOT-based Internet of things water meter low-power consumption and rapid command response system of claim 6, wherein: the power supply module is a lithium battery, the lithium battery is detachably mounted in the water meter and supplies power to the water meter, and the static working current of the system is maintained at 0.015 mA.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210398334.3A CN114710762A (en) | 2022-04-15 | 2022-04-15 | Water meter low-power consumption and rapid instruction response system based on NBIOT (network-based input/output) Internet of things |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210398334.3A CN114710762A (en) | 2022-04-15 | 2022-04-15 | Water meter low-power consumption and rapid instruction response system based on NBIOT (network-based input/output) Internet of things |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115665837A (en) * | 2022-10-18 | 2023-01-31 | 青岛鼎信通讯科技有限公司 | Method for solving PSM (Power supply model) mode reliable work of NB-IoT (network of things) water meter |
| CN115866733A (en) * | 2023-02-28 | 2023-03-28 | 深圳合众致达科技有限公司 | Based on thing networking NB valve accuse water gauge power saving control system |
-
2022
- 2022-04-15 CN CN202210398334.3A patent/CN114710762A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115665837A (en) * | 2022-10-18 | 2023-01-31 | 青岛鼎信通讯科技有限公司 | Method for solving PSM (Power supply model) mode reliable work of NB-IoT (network of things) water meter |
| CN115866733A (en) * | 2023-02-28 | 2023-03-28 | 深圳合众致达科技有限公司 | Based on thing networking NB valve accuse water gauge power saving control system |
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