Electromagnetic water meter and control system thereof

Abstract

The invention provides an electromagnetic water meter and a control system thereof, and relates to the technical field of electromagnetic water meters, the electromagnetic water meter comprises an MCU controller, and a flow information processing module, an LCD liquid crystal display module, an electronic ink screen module and a near-end communication module which are respectively connected with the MCU controller; the flow information processing module is connected with at least one electromagnetic water meter sensor; the electromagnetic water meter sensor generates a corresponding electromotive force signal under the action of real-time flow; the flow information processing module is used for converting the electromotive force signal into corresponding flow information; the MCU controller is used for sending the flow information to the near-end communication module and sending the flow information to the LCD module and / or the electronic ink screen module for displaying; by arranging various devices capable of obtaining the flow information, the technical problem that in the prior art, reading cannot be conducted in time when an electromagnetic water meter is abnormal is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic water meters, and in particular to an electromagnetic water meter and a control system thereof. Background Art

[0002] Electromagnetic water meter is a smart water meter that uses Faraday's electromagnetic induction principle for measurement. Its important structures include sensors composed of coils, electrodes, measuring pipes and shells, converters composed of electronic modules, and electronic indicating devices. The sensor is used to generate induced electromotive force related to flow rate, the converter is used to process the electromotive force signal and convert it into flow information, and the indicating device is used to display information such as accumulated flow and flow rate. Some electromagnetic meters will also be equipped with wireless communication modules to periodically report flow data to the data monitoring platform.

[0003] The inventors have found that in actual applications, current electromagnetic water meters may experience various abnormal situations such as power failure and failure. At this time, users cannot read the water meter data and often need to wait for the water meter to return to normal before obtaining the reading. The efficiency of reading the water meter data is not high. Summary of the invention

[0004] The object of the present invention is to provide an electromagnetic water meter and a control system thereof, which can alleviate the technical problem in the prior art that the electromagnetic water meter cannot read the water flow in time due to abnormality by setting a variety of devices capable of obtaining flow information.

[0005] In a first aspect, an embodiment of the present invention provides an electromagnetic water meter, comprising: an MCU controller, a flow information processing module, an LCD liquid crystal display module, an electronic ink screen module and a proximal communication module respectively connected to the MCU controller; the flow information processing module is connected to at least one electromagnetic water meter sensor;

[0006] The electromagnetic water meter sensor generates a corresponding electromotive force signal under the action of real-time flow;

[0007] The flow information processing module is used to convert the electromotive force signal into corresponding flow information;

[0008] The MCU controller sends the flow information to the proximal communication module, and sends the flow information to the LCD liquid crystal display module and / or the electronic ink screen module for display.

[0009] In combination with the first aspect, an embodiment of the present invention provides a first possible implementation of the first aspect, wherein the MCU controller is also used to control the LCD liquid crystal display module to display the flow information when the power status and working status of the electromagnetic water meter are normal.

[0010] In combination with the first aspect, an embodiment of the present invention provides a second possible implementation of the first aspect, wherein the LCD liquid crystal display module includes a display unit and an operation unit, the display unit is a liquid crystal display interface, and the operation unit includes a photosensitive serial port and an infrared serial port;

[0011] The photosensitive serial port is connected to the MCU controller and is used to receive the flow information;

[0012] The infrared serial port is connected to the proximal communication module and is used to read the flow information and / or control signal sent by the proximal communication module.

[0013] In combination with the first aspect, an embodiment of the present invention provides a third possible implementation of the first aspect, wherein the MCU controller is also used to control the electronic ink screen module to display the flow information when the power state or working state of the electromagnetic water meter is abnormal.

[0014] In combination with the first aspect, an embodiment of the present invention provides a fourth possible implementation of the first aspect, wherein the MCU controller integrates the flow information into a two-dimensional code image and sends it to the electronic ink screen module for display; wherein the two-dimensional code image is updated under preset conditions, and the original data used to encode the two-dimensional code image includes: version number, letter and number encoding mode, error correction level, water meter number, current accumulated flow, meter parameters and fault information.

[0015] In combination with the first aspect, an embodiment of the present invention provides a fifth possible implementation of the first aspect, wherein the electronic ink screen module includes a CS pin, a D / C pin, a RES pin, a BUSY pin and an SPI pin;

[0016] CS pin, used for the MCU controller to enable the electronic ink screen module;

[0017] D / C pin, used for the MCU controller to control the electronic ink screen module to perform command operations or transmit the flow information;

[0018] RES pin, used by the MCU controller to control the reset of the electronic ink screen module;

[0019] BUSY pin, connected to the input port of the MCU controller, for detecting the current state of the electronic ink screen module;

[0020] SPI pin, used for the MCU controller to control the power supply of the electronic ink screen module.

[0021] In combination with the first aspect, an embodiment of the present invention provides a sixth possible implementation of the first aspect, wherein the MCU controller is also used to control the proximal communication module to send the traffic information to the target end when a proximal communication signal is detected; wherein the target end is a device that sends a proximal communication signal to the MCU controller.

[0022] In combination with the first aspect, an embodiment of the present invention provides a seventh possible implementation of the first aspect, wherein the proximal communication module sends the control signal sent by the target end to the LCD liquid crystal display module, so that the LCD liquid crystal display module displays the traffic information corresponding to the control signal.

[0023] In combination with the first aspect, an embodiment of the present invention provides an eighth possible implementation of the first aspect, which further includes a wireless communication module connected to the MCU controller to send the flow information to the water platform.

[0024] In a second aspect, an embodiment of the present invention further provides an electromagnetic water meter control system, comprising the electromagnetic water meter as described above, and also comprising a water service platform connected to the electromagnetic water meter.

[0025] The embodiment of the present invention provides an electromagnetic water meter and a control system thereof. The flow information processing module in the electromagnetic water meter can convert the electromotive force signal collected by the electromagnetic water meter sensor into flow information; the MCU controller simultaneously transmits the flow information to the proximal communication module, the LCD liquid crystal display module and / or the electronic ink screen module for redundant backup; if the electromagnetic water meter has power failure, failure or other abnormalities in actual application, there may also be a component that can display or read the water meter reading, thereby improving the reading efficiency of the water meter reading.

[0026] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A structural block diagram of an electromagnetic water meter provided by an embodiment of the present invention;

[0030] Figure 2 A pin diagram of an electronic ink screen module provided by an embodiment of the present invention;

[0031] Figure 3 A schematic diagram of a power supply circuit of an electronic ink screen module provided in an embodiment of the present invention;

[0032] Figure 4 A flow chart of an application method of an electromagnetic water meter provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] At present, when a water meter fails due to environmental or other factors, users can only roughly estimate the current meter accumulation through the latest reported data from the water platform, which often has a significant error from the actual flow. Some manufacturers also obtain the final flow data by reading the circuit built by the electronic module storage chip, which often requires cumbersome operation steps and a long operation time, and when the storage chip is also damaged, the data cannot be obtained in time.

[0035] Based on this, an electromagnetic water meter and its control system provided by an embodiment of the present invention sends flow information to three redundant terminal components respectively. Even if the electromagnetic water meter is in an abnormal situation such as power failure or failure, the water meter reading can still be read in time, thereby improving the meter reading efficiency.

[0036] The following is a detailed description through examples.

[0037] Figure 1 A structural block diagram of an electromagnetic water meter provided in an embodiment of the present invention.

[0038] Reference Figure 1 The electromagnetic water meter includes: an MCU controller, a flow information processing module, an LCD liquid crystal display module, an electronic ink screen module and a proximal communication module respectively connected to the MCU controller; the flow information processing module is connected to at least one electromagnetic water meter sensor;

[0039] Electromagnetic water meter sensor( Figure 1 (not shown), generates a corresponding electromotive force signal under the action of real-time flow; the position of the electromagnetic water meter sensor can be set accordingly according to the actual facilities such as specific water meters and pipelines;

[0040] The flow information processing module is connected to the MCU controller through the AD sampling channel, and is used to convert the electromotive force signal into the corresponding flow information, and then transmit the flow information to the MCU controller through the AD sampling channel; the flow information processing module can use an ADC module that converts analog signals into digital signals;

[0041] The MCU controller sends the flow information to the proximal communication module, and sends the flow information to the LCD display module and / or the electronic ink screen module for display. The LCD display module can use the SDS module that can display and operate the liquid crystal, and is connected to the MCU control through a parallel interface; the electronic ink screen module can use the GDEY module of the ink screen, and is connected to the MCU through the SPI interface.

[0042] In a preferred embodiment of actual application, the flow information processing module in the electromagnetic water meter can convert the electromotive force signal collected by the electromagnetic water meter sensor into flow information; the MCU controller transmits the flow information to the proximal communication module, LCD liquid crystal display module and / or electronic ink screen module at the same time for redundant backup; if the electromagnetic water meter encounters power failure, failure or other abnormalities in actual application, there may also be a component that can display or read the water meter reading, thereby improving the reading efficiency of the water meter reading.

[0043] As an optional embodiment, the MCU controller is also used to control the LCD display module to display flow information when the power status and working status of the electromagnetic water meter are normal, or to control the LCD display module and the electronic ink screen module to redundantly display the flow information at the same time.

[0044] It should be noted that Figure 2 The charging module is used to power the electromagnetic water meter. If the power state and working state of the electromagnetic water meter are normal, the LCD display module and the electronic ink screen module can be controlled to display redundantly at the same time, so that when the meter fails, there will also be a component that can display the flow information.

[0045] The LCD display module of the electromagnetic water meter can use a liquid crystal plus buttons as a human-computer interaction interface, which can be used to display positive cumulative flow, reverse cumulative flow, net flow, flow rate, meter status, water pressure and equipment parameters, etc.; as a preferred embodiment, it can respond to user operation instructions input by liquid crystal or buttons to control the target category of flow information displayed on the LCD display module.

[0046] The LCD module includes a display unit and an operation unit. The display unit is a liquid crystal display interface for displaying flow information. The operation unit includes a photosensitive serial port and an infrared serial port.

[0047] The photosensitive serial port is connected to the MCU controller to receive traffic information and transmit information and send and receive signals with the MCU controller;

[0048] The infrared serial port is connected to the proximal communication module and is used to read the flow information and / or control signal sent by the proximal communication module. The control signal can be understood as a control signal input by the user based on the proximal communication module, and the LCD liquid crystal display module presents the corresponding flow information display based on the control signal.

[0049] Here, the liquid crystal of the display unit can display monitoring data, equipment parameters, etc. in the form of a menu, and the menu can be controlled by magnets or light-shielding sensors.

[0050] As another optional embodiment, the MCU controller is also used to control the electronic ink screen module to display flow information when the power state or working state of the electromagnetic water meter is abnormal.

[0051] There are many small "microcapsules" attached to the surface of the electronic ink screen module, which encapsulate negatively charged black particles and positively charged white particles. By changing the charge, particles of different colors are arranged in order, thus presenting a clear black and white visual effect. One of its major features is that after the display is refreshed, even if the battery is removed, the display content will remain on the screen for a long time. Therefore, only when the display content needs to be updated, the ink screen needs to be powered to transmit the display content, which greatly reduces the power consumption of the product.

[0052] In the actual application of power supply control for electronic ink screen modules, the following can be used: Figure 3 As shown in the circuit diagram, the MCU controller controls the electronic ink screen module and its working power supply through the SPI interface. The default control pin CTL_LCD is high level, and the power supply of the electronic ink screen module is disconnected. When the electronic ink screen module needs to update the display of flow information, that is, when the latest flow information sent by the MCU controller is received, the level of the CTL_LCD pin is controlled to be pulled low, so that the device Q1 is turned on to form a low-resistance path. At this time, the electronic ink screen module obtains the power supply voltage, and then updates the flow information sent by the MCU controller.

[0053] In some embodiments, the MCU controller can integrate the traffic information into a QR code image and send it to the electronic ink screen module for display; the QR code is characterized by high density and large capacity. It supports digital encoding of text and has a powerful fault-tolerant error correction function.

[0054] Among them, the QR code image is updated under the influence of preset conditions, which may include a preset period, or the difference in flow information before and after reaches a preset numerical requirement; after the electronic ink screen module displaying the QR code is applied to the electromagnetic water meter, when the water meter encounters extreme conditions, the flow information can still be obtained in time.

[0055] The electronic ink screen module can communicate data with the MCU controller and display the flow information to be displayed in the form of a QR code image. As a result, the metering data such as the water consumption of the water meter can be easily obtained by scanning the QR code, and the data will not be lost even in the case of power failure. When the user needs to read the flow information, he only needs to open the mobile phone or QR code scanning tool, scan the QR code on the ink screen, and immediately read the latest meter information of the electromagnetic water meter, thereby obtaining the cumulative amount, and analyzing the cause of the fault based on the final fault information. Maintenance operations such as replacement of the converter can also be performed based on the parameters of the meter.

[0056] The QR code has its own encoding rules, using version numbers, letter and number encoding modes, and M-level error correction levels. The water meter number, current cumulative flow, meter parameters, fault information and other data are used as the original data for the QR code encoding. The QR code generation module algorithm is processed on the MCU processor to output two-dimensional QR code image data. The data is transmitted to the ink screen through the SPI interface and the local brush command method.

[0057] For example, when the flow information of the electromagnetic water meter changes, the data to be displayed is converted into a QR code image data through the QRCode rule, and the corresponding drive circuit and interface circuit of the electronic ink screen module are used to control the application mode of the ink screen, and the QR code image data is passed to the ink screen controller. The ink screen displays the QR code after an appropriate refresh mode. When the water meter loses power, the QR code image on the ink screen can be completely saved. By scanning the QR code, the user can obtain the latest flow data and equipment information of the electromagnetic meter without installing any application software, solving the problem of flow update. At the same time, the latest status of the water meter, including fault information, environmental information and parameters in the meter, can be obtained through the QR code data, which plays an auxiliary role in product maintenance.

[0058] Specifically, in this practical application, the MCU controller can use the Fudan microprocessor FM33M series, which integrates a wealth of peripheral modules, has multiple SPI interfaces and UART serial ports, and combines Figure 1 The interface distribution connects each module. The MCU controller also has an LCD controller, an integrated EMU unit, multiple sigma-delta ADCs and PGAs, and a high-precision reference source, and is suitable for ADC sampling and processing of electromagnetic water meter flow signals.

[0059] The electronic ink screen module adopts GDEY0154D67 with SPI communication interface. It has compact size and 200*200 resolution, and can perform 3 refresh modes.

[0060] Among them, from Figure 2 As can be seen, the connection between the electronic ink screen module, working power supply and MCU control; the electronic ink screen module includes CS pin, D / C pin, RES pin, BUSY pin and SPI pin;

[0061] CS pin, used for the MCU controller to enable the electronic ink screen module;

[0062] D / C pin, used by the MCU controller to control the electronic ink screen module to perform command operations or transmit traffic information;

[0063] RES pin, used by the MCU controller to reset the electronic ink screen module;

[0064] The BUSY pin is connected to the input port of the MCU controller and is used to detect the current state of the electronic ink screen module. When the BUSY pin is at a high level, it indicates that the electronic ink screen module is outputting the display. Only when the BUSY pin is at a low level is communication with the electronic ink screen module allowed. When the communication is completed and the BUSY pin is at a low level, the MCU controller can control the disconnection of the working power of the electronic ink screen module.

[0065] SPI pins are used by the MCU controller to control the power supply of the electronic ink screen module.

[0066] On the basis of the above-mentioned embodiment, the MCU controller is also used to control the near-end communication module to send the flow information to the target end when a near-end communication signal is detected.

[0067] Among them, the target end is a device that sends a proximal communication signal to the MCU controller; the target end can be understood as an intelligent control device that can interact with the proximal communication module through the proximal communication protocol; for example, the user's mobile phone interacts with the proximal communication module through the NFC function, and when the MCU controller monitors the NFC signal, it controls the proximal communication module to send the traffic information to the user's mobile phone, so that the user can view the progress of the traffic information.

[0068] As an optional embodiment, the near-end communication module sends the control signal sent by the target end to the LCD display module, so that the LCD display module displays the flow information corresponding to the control signal. For example, the LCD display module can display a specific type of flow information, or flow information at a specific time, etc. according to the control signal.

[0069] In some embodiments, a wireless communication module connected to the MCU controller is also included to send flow information to the water platform; the wireless communication module is connected to the MCU controller via a UART interface, and the wireless communication module can use a BC95 module for NB communication.

[0070] The wireless communication module exchanges data with the water platform through the operator network. The connection between the MCU controller and the wireless communication module includes 4 pins: RXD0, TXD0, VCC, GND, as well as a universal electrical interface and a universal position connection, so that the NB communication module can be replaced on different electromagnetic water meters. The electromagnetic water meter equipment and the water platform follow the relevant data transmission protocol, so that the water platform can transmit and analyze monitoring data, equipment parameters and other information.

[0071] In some embodiments, the electromagnetic water meter also includes a storage module connected to the MCU controller, which is used to store acquired water use data, related parameters, etc.; the storage module uses Flash as a storage medium, and the MCU controller periodically stores flow information such as monthly and daily water consumption accumulation, forward and reverse accumulation, alarm logs, etc. into the Flash.

[0072] In some embodiments, Figure 4 As shown, a flow chart of an application method of an electromagnetic water meter is also provided.

[0073] Initialize the ink screen IO control port, initialize the SPI serial port, and then set the ink screen mode and parameters; determine whether the current excitation cycle has been reached;

[0074] If not (not reached), re-execute the judgment step;

[0075] If yes, calculate the instantaneous flow of the electromagnetic meter, update the accumulated flow of the electromagnetic meter, and then determine whether the accumulated flow change is greater than the preset threshold F1;

[0076] If not (less than), determine whether other packaging parameters have changed;

[0077] If there is no change, then the step of determining whether the current excitation cycle has been reached is executed;

[0078] If it is changed, a QR code image is generated, and the QR code image is transmitted to the ink screen while the power of the ink screen is turned off, and then the step of determining whether the current excitation cycle is reached is executed;

[0079] If (greater than), generate a QR code image, transmit the QR code image to the ink screen and turn off the power of the ink screen, and then execute the step of determining whether the current excitation cycle is reached;

[0080] Generally speaking, the excitation cycle of the electromagnetic meter is 10S, that is, the water meter calculates the instantaneous flow rate every 10S, and updates the cumulative amount according to the instantaneous flow rate. The ink screen itself has a page refresh time. If the page is refreshed according to the frequency of the excitation cycle, it will consume a lot of electricity and affect the service life. Therefore, a flow change threshold F1 is set to balance the real-time measurement of the electromagnetic meter and the low power consumption requirement of the ink screen display. That is, when the cumulative flow rate of the change is greater than F1, the step of sending the flow information to the electronic ink screen module is performed. In addition, when the state of the electromagnetic meter changes, such as new fault information, or important operating parameters of the electromagnetic meter such as zero point and calibration parameters change, it is also necessary to update the data and regenerate the QR code. After generating the QR code image, turn off the power of the ink screen and wait for the next excitation cycle to save power consumption.

[0081] This application can achieve the purpose of easily obtaining the accumulated flow rate even when the electromagnetic water meter loses power. It can solve water use disputes and provide data support for tracing the cause of the fault. In addition, this solution has little impact on the power consumption of the meter, little impact on the cost, and small space occupation of the meter head, which is an effective guarantee for the reliable application of 2.0 smart meters.

[0082] In some embodiments, an embodiment of the present invention further provides an electromagnetic water meter control system, including the electromagnetic water meter as described above, and also including a water service platform connected to the electromagnetic water meter.

[0083] Exemplarily, the electromagnetic water meter control system includes a water service platform connected to at least one electromagnetic water meter; the water service platform is used to analyze the flow information sent by each electromagnetic water meter, and then control each electromagnetic water meter according to the analysis results, or form a flow statistics report for each electromagnetic water meter according to the analysis results.

[0084] The electromagnetic water meter control system provided in the embodiment of the present invention has the same technical features as the electromagnetic water meter provided in the above embodiment, so it can also solve the same technical problems and achieve the same technical effects.

[0085] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0086] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0087] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0088] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0089] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0090] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present invention, which are used to illustrate the technical solutions of the present invention rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the aforementioned embodiments, those of ordinary skill in the art should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the aforementioned embodiments within the technical scope disclosed by the present invention, or can easily conceive of changes, or make equivalent replacements for some of the technical features therein. Such modifications, changes or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the protection scope of the present invention.

Claims

1. An electromagnetic water meter, characterized in that: include: MCU controller, a flow information processing module, an LCD liquid crystal display module, an electronic ink screen module and a near-end communication module respectively connected to the MCU controller; The flow information processing module is connected to at least one electromagnetic water meter sensor; The electromagnetic water meter sensor generates a corresponding electromotive force signal under the action of real-time flow; The flow information processing module is used to convert the electromotive force signal into corresponding flow information; The MCU controller sends the flow information to the proximal communication module, and sends the flow information to the LCD liquid crystal display module and / or the electronic ink screen module for display.

2. The electromagnetic water meter according to claim 1, characterized in that: The MCU controller is also used to control the LCD liquid crystal display module to display the flow information when the power state and working state of the electromagnetic water meter are normal.

3. The electromagnetic water meter according to claim 2, characterized in that: The LCD liquid crystal display module includes a display unit and an operation unit, the display unit is a liquid crystal display interface, and the operation unit includes a photosensitive serial port and an infrared serial port; The photosensitive serial port is connected to the MCU controller and is used to receive the flow information; The infrared serial port is connected to the proximal communication module and is used to read the flow information and / or control signal sent by the proximal communication module.

4. The electromagnetic water meter according to claim 1, characterized in that: The MCU controller is also used to control the electronic ink screen module to display the flow information when the power state or working state of the electromagnetic water meter is abnormal.

5. The electromagnetic water meter according to claim 4, characterized in that: The MCU controller integrates the flow information into a two-dimensional code image and sends it to the electronic ink screen module for display; wherein, the two-dimensional code image is updated under the influence of preset conditions, and the original data used to encode the two-dimensional code image includes: version number, letter and number encoding mode, error correction level, water meter number, current accumulated flow, meter parameters and fault information.

6. The electromagnetic water meter according to claim 5, characterized in that: The electronic ink screen module includes a CS pin, a D / C pin, a RES pin, a BUSY pin and an SPI pin; CS pin, used for the MCU controller to enable the electronic ink screen module; D / C pin, used for the MCU controller to control the electronic ink screen module to perform command operations or transmit the flow information; RES pin, used by the MCU controller to control the reset of the electronic ink screen module; BUSY pin, connected to the input port of the MCU controller, for detecting the current state of the electronic ink screen module; SPI pin, used for the MCU controller to control the power supply of the electronic ink screen module.

7. The electromagnetic water meter according to claim 1, characterized in that: The MCU controller is also used to control the proximal communication module to send the flow information to the target end when a proximal communication signal is detected; wherein the target end is a device that sends a proximal communication signal to the MCU controller.

8. The electromagnetic water meter according to claim 7, characterized in that: The near-end communication module sends the control signal sent by the target end to the LCD liquid crystal display module, so that the LCD liquid crystal display module displays the flow information corresponding to the control signal.

9. The electromagnetic water meter according to claim 1, characterized in that: It also includes a wireless communication module connected to the MCU controller to send the flow information to the water platform.

10. An electromagnetic water meter control system, characterized in that: It comprises the electromagnetic water meter as described in any one of claims 1 to 9, and also comprises a water service platform connected to the electromagnetic water meter.

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