Intelligent water meter capable of predicting water consumption and based on NB-IoT (Narrow Band Internet of Things) technology

Abstract

The utility model discloses an NB-IoT (Narrow Band Internet of Things) technology-based intelligent water meter capable of predicting water consumption, which comprises a water meter main body, an intelligent control module, an NB-IoT intelligent communication module, a battery module, an RS485 module, a display, a reed switch sensor and a memory, and can realize real-time monitoring and prediction of the water consumption. Wherein the NB-IoT intelligent communication module can be automatically awakened at the set time and perform data transmission, so that the power consumption is reduced, and the data acquisition and transmission efficiency is improved. The intelligent control module adopts an STM32 series single-chip microcomputer and can predict water consumption, and a prediction result can be displayed and looked up in the future. In addition, the intelligent water meter further has a long-service-life battery design and a sealing design, so that the intelligent water meter has high practicability and reliability. The intelligent water meter provided by the utility model has advanced technology, stable and reliable performance and multiple practical functions, can provide timely water consumption data and water consumption change trend for users, and has important significance for effectively preventing the problems of water resource waste, water shortage of users and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of water meters, and in particular to an intelligent water meter based on NB-IoT technology that can predict water consumption. Background Art

[0002] Water meters are instruments that measure water flow, mostly the cumulative flow of water. With the increasing consumption of water resources, water meters are becoming more and more important. Currently, there are a large number of water meter users and they are widely distributed. Manual meter reading is becoming increasingly difficult. In addition, traditional water meters are difficult to install and maintain, and have a short service life. They are no longer suitable for the needs of the current era. Smart water meters are highly intelligent, have low power consumption, and are easy to install and maintain. They have become the focus of current and future development.

[0003] Existing water meters do not have the function of predicting water flow, which leads to oversupply and undersupply. With the continuous development of the economy, water consumption has increased rapidly, and the complexity and uncertainty of water supply have become increasingly prominent, making it difficult to accurately grasp future water demand and supply. Therefore, the development of smart water meters that can accurately predict and analyze water consumption is of great significance to effectively prevent water resource waste and water shortage for users. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the shortcomings of the prior art, the utility model provides a smart water meter based on NB-IoT technology that can predict water consumption, solving the problems raised in the above background technology.

[0006] (II) Technical solution

[0007] To achieve the above purpose, the utility model is implemented by the following technical solutions: a smart water meter based on NB-IoT technology that can predict water consumption, including a water meter body, an intelligent control module, an NB-IoT intelligent communication module, a battery module, an RS485 module, a display, a reed switch sensor, and a memory. The two ends of the water meter body are welded with a water pipe and a drain pipe, a filter screen and a support ring are installed next to the water pipe, and a connecting threaded part is installed next to the drain pipe. The NB-IoT intelligent communication module receives and sends data through an antenna, and the reed switch sensor measures the water consumption. One side is connected to the intelligent control module, and the intelligent control module adopts an STM32 series single-chip microcomputer. A battery module is arranged next to the intelligent control module, including an electronic component jack and a battery slot, and an RS485 module is arranged between the NB-IoT intelligent communication module and the intelligent control module. The RS485 module completes the transmission and reception of serial port data, the battery slot contacts the lithium battery through a spring, and the electronic component jack and the battery slot are covered with a cover with sealing strips embedded around them.

[0008] The implementation mechanism of the NB-IoT intelligent communication module is to set a timer inside the intelligent control module to automatically wake up the NB-IoT intelligent communication module at 10 am and 3 pm. When it is necessary to collect and upload data, the battery powers the RS485 module, and the system transmits the smart water meter data through the RS485 module and stores it in the protocol format. When storing data, the current time is recorded first. If the time is not initialized, the data collection is abandoned. Each data collection forms a record, which includes instantaneous flow, cumulative flow, etc. The NB-IoT intelligent communication module will send all the historical data currently stored, and send the historical data one by one in the order from the last to the first time. If the report is not successful, the record will continue to be retained and wait for the next upload. In order to reduce power consumption, the NB-IoT intelligent communication module is in a sleep state for a long time. If it is necessary to collect smart water meter data, report data or set parameters, the NB-IoT intelligent communication module will be abnormally awakened.

[0009] The function of water consumption prediction is realized by writing the relevant functions of timer, gray prediction method and multiple linear regression analysis in the STM32 series microcontroller, and setting 10 am and 3 pm as the time for daily data reporting. The whole process is carried out by the timer. The working principle of the timer is that every time the set counting time ends, an interrupt will appear in the system. At this time, the system will start the data collection related program according to the requirements, use the reed switch sensor to collect data, and transfer the collected data to the memory. The STM32 series microcontroller retrieves the input data within the prediction time period from the memory, and then calls the relevant functions of gray prediction method and multiple linear regression analysis to analyze and calculate the collected instantaneous flow, cumulative flow and other related data, and finally writes the prediction results to the memory and display. In order to display and check the relevant data in the future.

[0010] On the basis of the above technical solution, the bottom surfaces of the protective covers of the water meter body, intelligent control module, NB-IoT intelligent communication module, and battery module are all rotatably connected to a connecting plate, and a mounting frame is rotatably connected between one end of the connecting plate. The top surface of the reading area of ​​the water meter body is fixedly connected to a protective box with a connecting threaded part for shielding, thereby preventing the staff from not performing cleaning operations for a long time, which is beneficial to the surface cleaning of the intelligent water meter body. On the basis of the above technical solution, the water meter intelligent control module is internally provided with an RS485 module connected to the NB-IoT intelligent communication module and the intelligent control module. The reed switch sensor receives the data and transmits it to the intelligent control module. After integration, the water consumption is predicted by using the multiple linear regression analysis method and the gray prediction method. On the basis of the multiple linear regression analysis and gray prediction method models, the water consumption is predicted based on data such as instantaneous flow and cumulative flow.

[0011] Based on the above technical solution, the water meter body, intelligent control module, NB-IoT intelligent communication module and battery module are connected by detachable screws, which can be installed more conveniently and maintained more easily. The screws used for fixing the water meter body cover are anti-disassembly screws, which have good dustproof and protective effects.

[0012] Compared with the prior art, the utility model has the following advantages: The utility model optimizes the traditional NB-IoT smart water meter and adds the water consumption prediction function. The multivariate linear regression analysis method and the gray prediction method are effectively combined and integrated on the intelligent control module. The respective advantages are fully utilized, that is, the stability is enhanced and the influence of the poor information data is weakened to improve the final prediction accuracy. The predicted water consumption can effectively improve the utilization rate of water resources and reduce waste.

[0013] Optionally, a plurality of filter screens are provided and are arranged and distributed.

[0014] Optionally, the inner bottom surface of the NB-IoT intelligent communication module is preferably provided with three built-in threaded holes, and the six connection holes correspond to the six built-in threaded holes one by one, and are locked by six machine screws. The machine screws are evenly distributed in a rectangular array.

[0015] Optionally, the electronic component jack and the battery slot provided inside the battery module are connected by an inner and outer double-layer ultrasonic welding rib structure, which can make the electronic component jack and the battery slot provided inside the battery module more tightly combined with the bottom plate.

[0016] Optionally, the NB-IoT intelligent communication module uses China Mobile's M5310-A ​​module.

[0017] Optionally, the outer surfaces of the water pipe and the drainage pipe are clamped to the water meter body with self-tapping screws, and the elastic transparent pad is in contact with the inner walls of the water pipe and the drainage pipe.

[0018] (III) Beneficial effects

[0019] The utility model provides a smart water meter based on NB-IoT technology that can predict water consumption, which has the following beneficial effects:

[0020] 1. The smart water meter based on NB-IoT technology that can predict water consumption has the effect of being easy to disassemble and install by setting up several arranged and distributed filters. Through the coordinated setting of water pipes and drainage pipes, water is filtered through the filters one by one, which can fully filter out the impurities inside the water source and make the water quality better. In the long-term filtration process, the filter will accumulate a lot of impurities. By disassembling the filter by thread and connecting it by thread, the working time and labor intensity of the staff are greatly saved, and the practicality of the equipment is greatly improved.

[0021] 2. The NB-IoT-based smart water meter that can predict water consumption has the effect of being easy to inspect and maintain by being equipped with an active module. When the antenna fails, the antenna can be replaced separately. When the battery in the housing fails, the battery can be pulled out from the opening and inspected and maintained separately. After the maintenance is completed, it can be directly inserted. The smart water meter is simple and convenient to use, which can effectively improve the inspection and maintenance efficiency of the water meter and reduce the maintenance cost.

[0022] 3. The smart water meter based on NB-IoT technology that can predict water consumption has the effect of water consumption prediction through the setting of the intelligent algorithm of the STM32 series single-chip microcomputer. When in use, the water meter intelligent control module, that is, the STM32 series single-chip microcomputer, can be used to connect with the reed switch sensor. After receiving the data, the water consumption is predicted through the related models of the multiple linear regression analysis method and the gray prediction method, and the data is uploaded to the storage for archiving. The gray prediction method has good applicability when the information is incomplete or incomplete, but the single gray prediction method will be affected by unstable factors during the prediction process, resulting in a large deviation between the prediction result and the actual value. The use of the multiple linear regression analysis method to construct a stepwise regression analysis, and assuming the fitting equation to obtain the prediction result can better make up for the defect of the single gray model's unstable factors affecting the prediction result. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a side view of the three-dimensional structure of the utility model;

[0024] Figure 2 This is a top view of the three-dimensional structure of the utility model;

[0025] Figure 3 It is a top view of the structure of the cross section of the utility model;

[0026] Figure 4 This is a left view of the structure of the utility model;

[0027] Figure 5 This is the axonometric drawing of the utility model;

[0028] Figure 6 This is an axonometric drawing of the mounting frame of the utility model.

[0029] Figure 7 This is a block diagram of the intelligent water meter of the utility model.

[0030] In the figure: 1. water meter body; 2. elastic transparent pad; 3. fixing part; 4. drain pipe; 5. connecting threaded part; 6. connecting plate; 7. support ring; 8. sealing ring; 9. water pipe; 10. filter screen; 11. transparent plate; 12. pointer; 13. display; 14. battery module; 15. battery slot; 16. electronic component jack; 17. memory; 18. intelligent control module; 19. RS485 module; 20. NB-IoT intelligent communication module; 21. antenna; 22. display; 23. reed switch; 24. protective box; 25. clamping steel sheet; 26. lower fixing block; 27. mounting frame; 28. fixing frame; 29. ​​upper fixing block. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0032] Example 1

[0033] The utility model provides a technical solution: a water meter that is easy to install, comprising a water meter body 1, a drainage pipe 4 and a water pipe 9 are respectively arranged at both ends of the water meter body 1, a filter screen 10 and a support ring 7 are installed next to the water pipe 9, a connecting threaded member 5 is installed next to the drainage pipe 4, a plurality of the filter screens 10 are arranged and evenly distributed in a parallel array, a sealing ring 8 is sleeved on the outer surface of the support ring 7, a connecting plate 6 is connected to the rear side of the water meter body 1 through a connecting threaded member 5, a mounting frame 4 is connected to the rear side of the connecting plate 6 through a connecting threaded member 5, the mounting frame is connected to a protective box 24, the water meter body 1 and an intelligent control module 18, and an NB-IoT intelligent communication module 20. The battery module 14 is located in a protective box 24, which is used to protect the water meter body 1, the intelligent control module 18, the NB-IoT intelligent communication module 20, and the battery module 14. The drainage pipe 4 and the water pipe 9 of the intelligent water meter body 1 are both below the protective box 24. A transparent plate 11 is embedded on the top of the upper protective box, and the water meter body 1, the intelligent control module 18, the NB-IoT intelligent communication module 20, and the battery module 14 can be observed through the transparent plate 11. The bottom surface of the protective box 24 is rotatably connected to a connecting plate 6, and a mounting frame 27 is rotatably connected between one end of the connecting plate 6, and an elastic transparent pad 2 is installed on the surface of the connecting plate 6.

[0034] In order to achieve increased sealing, such as Figures 1 to 6As shown, the present application adopts the following structure, through the setting of the sealing ring 8, the elastic transparent pad 2, the protective box 24, and the connecting threaded member 5, the water meter which is easy to install has the effect of increasing the sealing performance, through the upper fixed block 29 and the clamping steel sheet 25 in the mounting frame, as well as the clamping steel sheet 25 and the lower fixed block 26 and the fixed frame 28 are matched, the upper fixed block 29 is fixedly connected to the fixed frame 28, the upper fixed block 29 is fixedly connected with the clamping steel sheet 25, the clamping steel sheet 25 is fixedly connected to the fixed frame 28, the lower fixed block 26 is fixedly connected to one side of the fixed frame 28 by the connecting threaded member 5, the upper fixed block 29 and the clamping steel sheet 25 as well as the clamping steel sheet 25 and the lower fixed block 26 rely on the structural support of the fixed frame 28 to ensure that the structure is fixed, the clamping steel sheet 25 is connected to the lower fixed block 26 by the connecting threaded member 5, and two fixed blocks are provided. During the use, when the upper fixing block 29 and the lower fixing block 26 are closed, the lower surface of the pressing steel sheet 25 is first embedded in the outer surface of the water meter body, and when they are closed, the water meter body 1 will be driven to move in the direction close to the sealing ring 8, so that one end of the water meter body 1 can be pressed against one side of the sealing ring 8, and the setting of the sealing ring 8, after the upper fixing block 29 and the lower fixing block 26 are combined, will be wrapped around the outer surface of the water meter body 1, so as to further seal the connection of the water meter body 1, thereby achieving the purpose of increasing the sealing. The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field within the technical scope disclosed by the utility model, according to the technical solution and the utility model concept of the utility model, shall be covered within the protection scope of the utility model.

Claims

1. A smart water meter based on NB-IoT technology that can predict water consumption, comprising a water meter body, an intelligent control module, an NB-IoT intelligent communication module, a battery module, an RS485 module, a display, a reed switch sensor, and a memory. A water pipe and a drain pipe are welded at both ends of the water meter body. A filter screen and a support ring are installed next to the water pipe. A connecting threaded part is installed next to the drain pipe. The NB-IoT intelligent communication module receives and sends data through an antenna. The reed switch sensor measures the water consumption. One side is connected to the intelligent control module. The intelligent control module adopts an STM32 series single-chip microcomputer. A battery module is arranged next to the intelligent control module, which includes an electronic component jack and a battery slot. An RS485 module is arranged between the NB-IoT intelligent communication module and the intelligent control module. The RS485 module completes the reception and transmission of serial port data. The battery slot contacts the lithium battery through a spring. The electronic component jack and the battery slot are covered with a cover with sealing strips embedded around them.

2. According to claim 1, a smart water meter based on NB-IoT technology capable of predicting water consumption is characterized in that: The filter screens are provided in a plurality and are arranged and distributed.

3. According to claim 1, a smart water meter based on NB-IoT technology capable of predicting water consumption is characterized in that: The inner bottom surface of the NB-IoT intelligent communication module is preferably provided with three built-in threaded holes, and the six connection holes correspond to the six built-in threaded holes one by one, and are locked by six machine screws, and the machine screws are evenly distributed in a rectangular array.

4. According to claim 1, the smart water meter based on NB-IoT technology capable of predicting water consumption is characterized in that: The electronic component jack and the battery slot inside the battery module are connected by an inner and outer double-layer ultrasonic welding rib structure, which can make the electronic component jack and the battery slot inside the battery module more tightly combined with the bottom plate.

5. According to claim 1, the smart water meter based on NB-IoT technology capable of predicting water consumption is characterized in that: The outer surfaces of the water delivery pipe and the drainage pipe are clamped with the water meter body by self-tapping screws.

Images