Electromagnetic water meter and control system thereof

Abstract

The utility model 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 (Microprogrammed Control Unit), 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; 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] This utility model relates to the technical field of electromagnetic water meters, and in particular to an electromagnetic water meter and its control system. Background Technology

[0002] Electromagnetic water meters are smart water meters that use Faraday's law of electromagnetic induction for measurement. Their key components include a sensor consisting of a coil, electrodes, a measuring pipe, and a housing; a converter composed of electronic modules; and an electronic indicating device. The sensor generates an induced electromotive force (EMF) related to flow velocity, the converter processes the EMF signal and converts it into flow information, and the indicating device displays information such as cumulative flow and flow velocity. Some electromagnetic meters also include a wireless communication module for periodically reporting flow data to a data monitoring platform.

[0003] The inventors discovered that current electromagnetic water meters are prone to various abnormal situations in practical applications, such as power outages and malfunctions. In these situations, users cannot read the water meter data and often have to wait for the water meter to return to normal before they can obtain the reading, resulting in low efficiency in reading water meter data. Utility Model Content

[0004] The purpose of this invention is to provide an electromagnetic water meter and its control system, which alleviates the technical problem of electromagnetic water meters failing to read data in a timely manner when malfunctioning by setting up multiple devices that can obtain flow information.

[0005] In a first aspect, this utility model 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 near-end communication module, all 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 near-end communication module, and then sends the flow information to the LCD liquid crystal display module and / or the e-ink screen module for display.

[0009] In conjunction with the first aspect, this utility model embodiment provides a first possible implementation of the first aspect, wherein the MCU controller is further configured 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 both normal.

[0010] In conjunction with the first aspect, this utility model embodiment 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 traffic information;

[0012] The infrared serial port is connected to the near-end communication module and is used to read the traffic information and / or control signals sent by the near-end communication module.

[0013] In conjunction with the first aspect, this utility model embodiment provides a third possible implementation of the first aspect, wherein the MCU controller is further configured to control the electronic ink screen module to display the flow information when the power status or working status of the electromagnetic water meter is abnormal.

[0014] In conjunction with the first aspect, this utility model embodiment provides a fourth possible implementation of the first aspect, wherein the MCU controller integrates the flow information into a QR code image and sends it to the e-ink screen module for display; wherein the QR code image is updated under preset conditions, and the original data used for encoding the QR code image includes: version number, alphanumeric encoding mode, error correction level, water meter number, current cumulative flow, meter parameters, and fault information.

[0015] In conjunction with the first aspect, this utility model embodiment 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] The CS pin is used by the MCU controller to enable the e-ink screen module;

[0017] The D / C pin is used by the MCU controller to control the e-ink screen module to perform command operations or transmit the flow information.

[0018] The RES pin is used by the MCU controller to control the reset of the e-ink screen module.

[0019] The BUSY pin is connected to the input port of the MCU controller and is used to detect the current status of the e-ink screen module.

[0020] The SPI pin is used by the MCU controller to control the power supply of the e-ink screen module.

[0021] In conjunction with the first aspect, this utility model embodiment provides a sixth possible implementation of the first aspect, wherein the MCU controller is further configured to control the near-end communication module to send the traffic information to the target end when a near-end communication signal is detected; wherein the target end is a device that sends a near-end communication signal to the MCU controller.

[0022] In conjunction with the first aspect, this utility model provides a seventh possible implementation of the first aspect, wherein 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.

[0023] In conjunction with the first aspect, this utility model embodiment 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 management platform.

[0024] Secondly, this utility model embodiment also provides an electromagnetic water meter control system, including the electromagnetic water meter as described above, and a water affairs platform connected to the electromagnetic water meter.

[0025] This utility model embodiment provides an electromagnetic water meter and its control system. 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 simultaneously to the near-end communication module, the LCD liquid crystal display module, and / or the electronic ink screen module for redundancy backup. If the electromagnetic water meter experiences power failure, malfunction, or other abnormalities in actual application, there can 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 this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 A structural block diagram of an electromagnetic water meter provided for an embodiment of this utility model;

[0030] Figure 2 A pin diagram of an electronic ink screen module provided for an embodiment of this utility model;

[0031] Figure 3 A schematic diagram of a power supply circuit for an electronic ink screen module provided in an embodiment of this utility model;

[0032] Figure 4 A flowchart illustrating the application method of an electromagnetic water meter provided in this embodiment of the present invention. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] Currently, when water meters malfunction due to environmental or other factors, users can only roughly estimate the current cumulative flow based on the latest data reported by the water management platform. This often results in a significant error compared to the actual flow rate. Some manufacturers obtain the final flow data by reading the circuitry of the electronic module's storage chip, but this often requires cumbersome procedures and a long processing time. Moreover, if the storage chip is also damaged, data cannot be obtained in a timely manner.

[0035] Based on this, the present invention provides an electromagnetic water meter and its control system, which sends the flow information to three redundant terminal components respectively. Even if the electromagnetic water meter is in an abnormal situation such as power failure or malfunction, 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 This is a structural block diagram of an electromagnetic water meter provided for an embodiment of the present utility model.

[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 near-end communication module, all 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 in the image), it generates a corresponding electromotive force signal under the action of real-time flow; the position of this electromagnetic water meter sensor can be set according to the specific water meter, pipeline and other actual facilities;

[0040] The flow information processing module is connected to the MCU controller via an AD sampling channel. It is used to convert the electromotive force signal into the corresponding flow information, and then transmit the flow information to the MCU controller via the AD sampling channel. This flow information processing module can be an analog-to-digital converter module.

[0041] The MCU controller sends the flow information to the near-end communication module and then to the LCD display module and / or e-ink display module for display. The LCD display module can be an SDS module capable of displaying and operating an LCD, and is connected to the MCU control via a parallel interface; the e-ink display module can be a GDEY module for an e-ink display, and is connected to the MCU via an SPI interface.

[0042] In a preferred embodiment of practical 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 simultaneously to the near-end communication module, the LCD liquid crystal display module and / or the e-ink screen module for redundancy backup; if the electromagnetic water meter experiences power failure, malfunction or other abnormalities in practical application, there can 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 liquid crystal 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 liquid crystal display module and the e-ink screen module to display flow information redundantly at the same time.

[0044] It should be noted that, Figure 2 The charging module in the middle is used to power the electromagnetic water meter. If the electromagnetic water meter is in normal power and working condition, it can control the LCD liquid crystal display module and the electronic ink screen module to display redundantly at the same time. This ensures that even if the meter malfunctions, there is still a component that can display flow information.

[0045] The LCD display module of the electromagnetic water meter can use an LCD plus buttons as a human-machine interface, which can be used to display positive cumulative flow, negative cumulative flow, net flow, flow rate, meter status, water pressure and equipment parameters, etc. In a preferred embodiment, it can respond to the user's operation command input on the LCD or buttons to control the target category of the flow information displayed on the LCD display module.

[0046] The LCD display module includes a display unit and an operation unit. The display unit is an LCD display interface for displaying flow information, and 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 to transmit and receive signals with the MCU controller.

[0048] An infrared serial port, connected to a near-end communication module, is used to read flow information and / or control signals sent by the near-end communication module. The control signals can be understood as control signals input by the user based on the near-end communication module, and the LCD display module displays the corresponding flow information based on these control signals.

[0049] Here, the LCD of the display unit can display monitoring data, equipment parameters, etc. in a menu format, and the menu can be controlled by a magnet or a light-blocking sensor.

[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 status or working status of the electromagnetic water meter is abnormal.

[0051] The surface of an e-ink display module is covered with numerous tiny "microcapsules" encapsulating negatively charged black particles and positively charged white particles. By changing the charge, the particles of different colors are arranged in an orderly manner, thus presenting a clear black-and-white visual effect. A key feature is that after the display refreshes, the displayed content remains on the screen even after the battery is removed. Therefore, power is only needed to the e-ink display to transmit the displayed content when updates are required, significantly reducing product power consumption.

[0052] In practical applications of power supply control for e-ink screen modules, methods such as... Figure 3The circuit diagram shown illustrates that the MCU controller controls the e-ink display module and its power supply via the SPI interface. By default, the control pin CTL_LCD is high, at which point the power supply to the e-ink display module is disconnected. When the e-ink display module needs to update the flow information display, i.e., when it receives the latest flow information sent by the MCU controller, it pulls the level of the control pin CTL_LCD low, turning on device Q1 and forming a low-impedance path. At this time, the e-ink display module obtains the power supply voltage and then updates the display of the flow information sent by the MCU controller.

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

[0054] The QR code image is updated under preset conditions, which may include a preset period or a preset value requirement for the difference in flow information between different times. When the electronic ink screen module that displays the QR code is applied to the electromagnetic water meter, the flow information can still be obtained in a timely manner even when the water meter is in extreme condition.

[0055] This e-ink display module can communicate with the MCU controller to display flow information as a QR code image. Therefore, water meter readings such as water consumption can be easily obtained by scanning the QR code, and the data is not lost even in the event of a power outage. When users need to read flow information, they simply open their mobile phone or a QR code scanner, scan the QR code on the e-ink display, and can immediately read the latest meter information of the electromagnetic water meter, thereby obtaining the cumulative flow. Based on the last fault information, the cause of the fault can be analyzed, and maintenance operations such as replacing the converter can be performed according to the meter parameters.

[0056] The QR code has its own encoding rules, using version number, alphanumeric encoding mode, and M-level error correction level. The water meter number, current cumulative flow, meter parameters, fault information and other data are used as the raw data for QR code encoding. The QR code generation module on the MCU processor processes the data and outputs two-dimensional QR code image data. The data is then transmitted to the e-ink screen via the SPI interface and the command method of local brushing.

[0057] For example, when the flow information of the electromagnetic water meter changes, the data to be displayed is generated into a QR code image using QR code rules. This image is then transmitted to the e-ink display controller via the corresponding driver and interface circuits of the e-ink display module. The controller then refreshes the display to show the QR code. Even when the water meter loses power, the QR code image is completely preserved. Users can scan the QR code to obtain the latest flow data and device information of the electromagnetic meter without installing any application software, thus solving the flow update problem. Furthermore, the QR code data provides the latest status of the water meter, including fault information, environmental information, and internal parameters, aiding in product maintenance.

[0058] Specifically, in this practical application, the MCU controller can be the Fudan Microprocessor FM33M series, which integrates a rich set of peripheral modules, featuring multiple SPI interfaces and a UART serial port, combined with... Figure 1 The interface is assigned to connect to each module. The MCU controller also has an LCD controller, an integrated EMU unit containing multiple sigma-delta ADCs and PGAs, and a high-precision reference source, suitable for ADC sampling and processing of electromagnetic water meter flow signals.

[0059] This e-ink screen module uses the GDEY0154D67 with an SPI communication interface. It has a compact size and a resolution of 200*200, and can perform three refresh modes.

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

[0061] The CS pin is used by the MCU controller to enable the e-ink display module.

[0062] The D / C pin is used by the MCU controller to control the e-ink screen module to perform command operations or transmit flow information.

[0063] The RES pin is used by the MCU controller to control the reset of the e-ink screen module;

[0064] The BUSY pin is connected to the input port of the MCU controller and is used to detect the current status of the e-ink display module. When the BUSY pin is high, it indicates that the e-ink display module is outputting a display. Communication with the e-ink display module is only allowed when the BUSY pin is low. When communication is complete and the BUSY pin is low, the MCU controller can control the disconnection of the e-ink display module's power supply.

[0065] The SPI pin is used by the MCU controller to control the power supply of the e-ink screen module.

[0066] Based on the aforementioned embodiments, the MCU controller is also used to control the near-end communication module to send traffic information to the target end when a near-end communication signal is detected.

[0067] The target device is the device that sends a near-end communication signal to the MCU controller. This target device can be understood as an intelligent control device that can interact with the near-end communication module through a near-end communication protocol. For example, when a user's mobile phone interacts with the near-end communication module through the NFC function, the MCU controller controls the near-end communication module to send traffic information to the user's mobile phone when it detects the NFC signal, so that the user can view the traffic information progress.

[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 specific types of flow information or flow information for a specific time period, 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 management platform; the wireless communication module is connected to the MCU controller via a UART interface, and the wireless communication module may be a BC95 module with NB communication.

[0070] The wireless communication module interacts with the water management platform via the operator's network. The connection between the MCU controller and the wireless communication module includes four pins: RXD0, TXD0, VCC, and GND, as well as a universal electrical interface and a universal location connection, allowing for interchangeable NB communication modules on different electromagnetic water meters. The electromagnetic water meter device and the water management platform adhere to relevant data transmission protocols, enabling the water management platform to transmit and analyze monitoring data, equipment parameters, and other information.

[0071] In some embodiments, the electromagnetic water meter further includes a storage module connected to an MCU controller for storing acquired water usage data, related parameters, etc. The storage module uses Flash as the storage medium, and the MCU controller periodically stores flow information such as monthly and daily cumulative water usage, forward and reverse cumulative water usage, and alarm logs into the Flash.

[0072] In some embodiments, such as Figure 4 As shown, a flowchart of an application method for an electromagnetic water meter is also provided.

[0073] Initialize the e-ink screen's I / O control port and SPI serial port, then set the e-ink screen's mode and parameters; determine if the current excitation cycle has been reached;

[0074] If not (not met), then repeat the judgment step;

[0075] If the threshold is reached, calculate the instantaneous flow rate of the electromagnetic meter, update the cumulative flow rate of the electromagnetic meter, and then determine whether the change in the cumulative flow rate is greater than the preset threshold F1.

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

[0077] If nothing changes, then proceed to the step of determining whether the current excitation cycle has been reached;

[0078] If the change is made, a QR code image is generated and transmitted to the e-ink screen while the e-ink screen power is turned off. Then, the step of determining whether the current excitation cycle has been reached is executed.

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

[0080] Typically, the excitation cycle of an electromagnetic meter is 10 seconds, meaning the water meter calculates the instantaneous flow rate every 10 seconds and updates the cumulative amount based on this instantaneous flow. However, the e-ink display has a page refresh time; refreshing the page according to the excitation cycle frequency would consume significant power and shorten its lifespan. Therefore, a flow change threshold F1 is set to balance the real-time measurement requirements of the electromagnetic meter with the low-power consumption needs of the e-ink display. That is, the flow information is only sent to the e-ink display module when the changed cumulative flow exceeds F1. Furthermore, when the electromagnetic meter's status changes, such as the addition of fault information or changes to important operating parameters like zero point and calibration parameters, the data needs to be updated and a QR code regenerated. After generating the QR code image, the e-ink display is powered off and waits for the next excitation cycle to save power.

[0081] This application enables the easy acquisition of cumulative flow even when the electromagnetic water meter loses power. It resolves water usage disputes and provides data support for tracing the cause of malfunctions. Furthermore, this solution has minimal impact on meter power consumption, cost, and meter header space occupancy, effectively ensuring the reliable application of 2.0 smart meters.

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

[0083] For example, the electromagnetic water meter control system includes a water management platform and at least one electromagnetic water meter connected together; the water management 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 generate a flow statistics report for each electromagnetic water meter according to the analysis results.

[0084] The electromagnetic water meter control system provided in this 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 this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0086] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0087] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

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

[0089] In addition, in the various embodiments of this utility model, each functional unit can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0090] Finally, it should be noted that the above-described embodiments are merely specific implementations of this utility model, used to illustrate the technical solutions of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this utility model. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be covered within the protection scope of this utility model.

Claims

1. An electromagnetic water meter, characterized by include: The MCU controller, and the flow information processing module, LCD liquid crystal display module, electronic ink screen module and 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 near-end communication module, and then sends the flow information to the LCD liquid crystal display module and / or the e-ink screen module for display.

2. The electromagnetic water meter of claim 1, 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.

3. The electromagnetic water meter of claim 2, 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. The photosensitive serial port is connected to the MCU controller and is used to receive the traffic information; The infrared serial port is connected to the near-end communication module and is used to read the traffic information and / or control signals sent by the near-end communication module.

4. The electromagnetic water meter of claim 1, wherein, The MCU controller is also used to control the electronic ink screen module to display the flow information when the power status or working status of the electromagnetic water meter is abnormal.

5. The electromagnetic water meter of claim 4, wherein, The electronic ink screen module includes a CS pin, a D / C pin, a RES pin, a BUSY pin, and an SPI pin; The CS pin is used by the MCU controller to enable the e-ink screen module; The D / C pin is used by the MCU controller to control the e-ink screen module to perform command operations or transmit the flow information. The RES pin is used by the MCU controller to control the reset of the e-ink screen module; The BUSY pin is connected to the input port of the MCU controller and is used to detect the current status of the e-ink screen module. The SPI pin is used by the MCU controller to control the power supply of the e-ink screen module.

6. The electromagnetic water meter of claim 1, wherein, The MCU controller is also configured to control the near-end communication module to send the traffic information to the target end when a near-end communication signal is detected; wherein, the target end is a device that sends a near-end communication signal to the MCU controller.

7. The electromagnetic water meter of claim 6, wherein, 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.

8. The electromagnetic water meter of claim 1, wherein, It also includes a wireless communication module connected to the MCU controller to send the flow information to the water management platform.

9. An electromagnetic water meter control system, characterized by, The system includes an electromagnetic water meter as described in any one of claims 1-8, and further includes a water management platform connected to the electromagnetic water meter.

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