Full-electronic water meter capable of still displaying data in power-down state

Abstract

The utility model discloses a full-electronic water meter capable of still displaying data in a power-down state, which comprises a flow measuring module, a data processing module, a data processing module, a data processing module and a data display module, and is characterized in that the flow measuring module is used for detecting volume flow of water passing through a pipeline; the main control unit is connected with the output end of the flow measurement module and used for receiving the flow data measured by the flow measurement module and outputting a display instruction according to the flow data; and the ink screen display module is connected with the main control unit and is used for receiving the display instruction output by the main control unit and displaying the flow data according to the display instruction so as to realize a power-off data retention function. According to the utility model, the main control unit receives the flow data output by the flow measurement module, and outputs the display instruction according to the flow data to control the ink screen display module to display the flow data; by utilizing the characteristic that the ink screen displays data in a power-off state, the problem that the water meter cannot display data after power-off is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of all - electronic water meters, and particularly to an all - electronic water meter that still displays data in a power - off state. Background Art

[0002] All - electronic water meters are widely used in water metering and remote monitoring. However, after power failure, the data on the liquid crystal display screen of existing all - electronic water meters will disappear, and there is no mechanical word - wheel reading available, resulting in the inability of personnel to read the data in a timely manner. During settlement, there are disputes over water consumption between water company personnel and users. This brings inconvenience to maintenance personnel and water service companies. Content of the Utility Model

[0003] The main purpose of the utility model is to provide an all - electronic water meter that still displays data in a power - off state, aiming to solve the problem that the water meter cannot display data after power failure.

[0004] To achieve the above object, the all - electronic water meter that still displays data in a power - off state proposed by the utility model includes:

[0005] A flow measurement module for detecting the volume flow rate of water in the pipeline;

[0006] A main control unit connected to the output end of the flow measurement module for receiving the flow data measured by the flow measurement module and outputting a display instruction according to the flow data;

[0007] An e - ink display module connected to the main control unit for receiving the display instruction output by the main control unit and displaying the flow data according to the display instruction, realizing the function of power - off data retention

[0008] The all - electronic water meter further includes:

[0009] A power supply module connected to the main control unit for supplying power to the main control unit;

[0010] A power - quantity detection circuit, with the first end connected to the output end of the power supply module and the second end connected to the main control unit, for detecting the output voltage value of the power supply module and outputting it to the main control unit;

[0011] The main control unit is further used for adjusting the refresh rate of the e - ink display module according to the output voltage value of the power supply module; wherein, when the output voltage value is less than a preset voltage value, the main control unit stops the refresh of the e - ink screen.

[0012] Optionally, the flow measurement module includes a mechanical electromechanical sampling device and / or an ultrasonic flow measurement device.

[0013] Optionally, the all - electronic water meter further includes:

[0014] A storage module, respectively connected to the main control unit and the e - ink screen display module, for storing data.

[0015] Optionally, the main control unit is further configured to store the flow rate data of the water body into the storage module after obtaining the flow rate data.

[0016] Optionally, the all - electronic water meter further includes:

[0017] A display driving unit, with the first end connected to the main control unit and the second end connected to the e - ink screen display module;

[0018] The main control unit is configured to output a corresponding refresh rate adjustment instruction to the display driving unit according to the output voltage value of the power supply module;

[0019] The display driving unit reads the latest flow rate data stored in the storage module every corresponding period according to the refresh rate adjustment instruction, and outputs it to the e - ink screen display module, so that the e - ink screen display module displays the flow rate data.

[0020] Optionally, the main control unit is further configured to store the flow rate data into the storage module when the output voltage value is less than a preset voltage value;

[0021] The all - electronic water meter further includes:

[0022] A display driving unit, with the first end connected to the main control unit and the second end connected to the e - ink screen display module;

[0023] The main control unit is configured to output it to the display driving unit after obtaining the flow rate data of the water body; the main control unit is further configured to output a stop refresh instruction to the display driving unit when the output voltage value is less than the preset voltage value;

[0024] The display driving unit is configured to output it to the e - ink screen display module after receiving the flow rate data of the water body, so that the e - ink screen display module displays the flow rate data;

[0025] Alternatively, when the display driving unit receives the stop refresh instruction, it reads the latest flow rate data stored in the storage module and outputs it to the e - ink screen display module, so that the e - ink screen display module displays the flow rate data.

[0026] Optionally, the all - electronic water meter further includes:

[0027] A wireless communication module, connected to the main control unit;

[0028] The main control unit is further configured to connect to an external device through the wireless communication module and transmit the traffic data to the external device.

[0029] Optionally, the external device includes a server.

[0030] Optionally, the wireless communication module includes:

[0031] A Bluetooth communication unit, communicatively connected to the main control unit, for performing a Bluetooth connection with an external device, so that the main control unit transmits traffic data to the external device.

[0032] The utility model discloses an all-electronic water meter that still displays data in a power-off state. The all-electronic water meter includes: a flow measurement module for detecting the volume flow of water in a pipeline; a main control unit connected to the output end of the flow measurement module for receiving the flow data measured by the flow measurement module and outputting a display instruction according to the flow data; and an e-ink screen display module respectively connected to the main control unit for receiving the display instruction output by the main control unit and displaying the flow data according to the display instruction, so as to implement the function of retaining data in a power-off state. The utility model receives the flow data output by the flow measurement module through the main control unit, and controls the e-ink screen display module to display the flow data according to the display instruction output by the flow data; by using the characteristic that the e-ink screen displays data in a power-off state, the problem that the water meter cannot display data after a power-off is solved. Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0034] Figure 1 It is a schematic structural diagram of an embodiment of the all-electronic water meter of the present utility model that still displays data in a power-off state;

[0035] Figure 2 It is a schematic structural diagram of another embodiment of the all-electronic water meter of the present utility model that still displays data in a power-off state;

[0036] Figure 3 It is a schematic structural diagram of yet another embodiment of the all-electronic water meter of the present utility model that still displays data in a power-off state;

[0037] Figure 4This is a schematic structural diagram of yet another embodiment of the all-electronic water meter that still displays data in the power-off state of the present utility model.

[0038] Explanation of the reference numerals in the attached drawings:

[0039]

[0040] The realization of the object, functional features, and advantages of the present utility model will be further described with reference to the embodiments and the attached drawings. Specific embodiments

[0041] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the attached drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0042] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0043] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0044] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0045] Refer to Figure 1, the present utility model proposes a fully electronic water meter 10 that still displays data in a power-off state, aiming to solve the problem that the data of the fully electronic water meter is not displayed or lost after power-off. The fully electronic water meter includes:

[0046] A flow measurement module 110 for detecting the volume flow rate of water in the pipeline;

[0047] A main control unit 120, connected to the output end of the flow measurement module 110, for receiving the flow data measured by the flow measurement module and outputting a display instruction according to the flow data;

[0048] An e-ink screen display module 140, connected to the main control unit 120, for receiving the display instruction output by the main control unit and displaying the flow data according to the display instruction to implement the power-off data retention function.

[0049] This solution uses the e-ink screen display module 140 to display the flow data output by the main control unit 120; the e-ink screen display module 140 includes an e-ink screen. The e-ink screen is a display that coats electronic ink on a layer of plastic film, which can be attached to a thin-film transistor (TFT / PET / FPC, etc.) circuit and forms a pixel pattern under the control of a driving IC. The e-ink screen is based on electronic ink technology, and its principle is that there are many very small "microcapsules" attached to the surface of the screen, which encapsulate black particles with negative charges and white particles with positive charges. By changing the charge, different colored particles are arranged in an orderly manner, thus presenting a clear black-and-white visualization effect. The e-ink screen has low power consumption and can still display data in the case of power-off. This solution uses the characteristics of the e-ink screen display module 140 with low power consumption and can display data for a long time in the case of power-off. Compared with other displays, this solution reduces the power consumption of the fully electronic water meter, extends the service life, and more importantly, provides an accurate charging basis for the water supply company, reducing data loss and user disputes.

[0050] In an embodiment of the present utility model, the all-electronic water meter is an ultrasonic water meter. The flow measurement module 110 includes an ultrasonic flow measurement device. An ultrasonic water meter is a new type of water meter that analyzes the time difference generated due to the change in velocity when an ultrasonic beam propagates downstream and upstream in water, and further calculates the water flow rate by analyzing and processing to obtain the water flow velocity. Since there are no moving parts and no flow-blocking elements inside the ultrasonic water meter, and it does not rely on mechanical rotating parts for measurement; instead, it relies on the processor to analyze the time difference of the propagation speed to obtain the water flow velocity. Therefore, an ultrasonic water meter generally uses a display screen to display water body information such as flow velocity and water volume. Existing ultrasonic water meters generally use a liquid crystal display screen, which needs to be powered on for display; when the ultrasonic water meter is powered off, the data displayed on the liquid crystal display screen will disappear, which may cause trouble for relevant personnel in timely reading of the data. The flow measurement module 110 may include an ultrasonic base pipe section and ultrasonic transducers. In addition, the flow measurement module 110 may further include an ultrasonic measurement unit for statistically calculating the water body flow velocity in each time period of the pipeline to be measured, and outputting the water body flow rate data to the main control unit 120 after obtaining the water body flow rate data.

[0051] In another embodiment of the present utility model, the flow measurement module 110 includes a mechanical electromechanical sampling device. The mechanical electromechanical sampling device relies on the mechanical rotating parts to measure the flow rate.

[0052] In another embodiment of the present utility model, after detecting the volume flow rate of the water body passing through the pipeline, the flow measurement module 110 outputs the flow velocity of the water body to the main control unit 120; the main control unit 120 includes a controller, such as an MCU, an SOC, or an FPGA, etc. The controller in the main control unit 120 can record it according to the reception time after receiving the flow velocity of the water body, so as to obtain the flow velocity of the water body at different time points; the controller can also integrate the flow velocity of the water body over a period of time to obtain the water body flow rate data during this period. The main control unit 120 can store the flow velocity of the water body and the water body flow rate data in the storage module 130; the storage module 130 may include a FLASH, a RAM, and a ROM. It should be noted that since the ROM can also retain data when powered off, the amount of data stored in the ROM is the largest, and it includes all the flow rate data and / or flow velocity data.

[0053] It should be noted that the controller serving as the main control unit 120 may have a built-in buffer or memory, capable of storing a certain amount of flow data. When receiving the flow data output by the flow measurement module 110, the main control unit 120 may store the flow data and directly output a display instruction based on the flow data, or analyze and process the flow data and then output a display instruction based on the processed data to control the e-ink display module 140 to display the corresponding flow data.

[0054] After obtaining the flow data of the water body, the main control unit 120 may display the flow data on the e-ink display module 140. It should be understood that the main control unit 120 may also display time data, the current flow rate of the water body, and a graph / table of the change trend of the flow rate of the water body over a period of time, etc. on the e-ink display module 140. It should be noted that the e-ink display module 140 needs to be refreshed with new data before the content displayed on the e-ink display module 140 will change; when there is no new data for refreshing, even if the e-ink display module 140 is powered off, it can still maintain the normal display of the existing data.

[0055] The present utility model discloses a fully electronic water meter 10 that still displays data in a power-off state. The fully electronic water meter includes: a flow measurement module 110 for detecting the volumetric flow rate of the water body passing through the pipeline; a main control unit 120 connected to the output end of the flow measurement module 110 for receiving the flow data measured by the flow measurement module 110 and outputting a display instruction based on the flow data; an e-ink display module 140 connected to the main control unit 120 for receiving the display instruction output by the main control unit 120 and displaying the flow data according to the display instruction. The present utility model receives the flow data output by the flow measurement module 110 through the main control unit 120 and controls the e-ink display module 140 to display the flow data according to the display instruction; by utilizing the characteristic that the e-ink screen displays data in a power-off state, the problem that the water meter cannot display data after power-off is solved.

[0056] It is easy to understand that the installation location of the water meter generally does not have power supply devices such as sockets, plug boards, or mobile power supplies to supply power to the fully electronic water meter; therefore, the fully electronic water meter generally uses a power supply module 150 for power supply; when the power of the power supply module 150 is exhausted, the fully electronic water meter is powered off and stops operating. In an embodiment of the present utility model, in order to prevent the fully electronic water meter 10 from losing flow data due to sudden power-off caused by a fault. For example: factors such as circuit water ingress and short circuit or damage caused by force majeure. In this embodiment, after obtaining the flow data of the water body, the main control unit 120 stores the flow data in the storage module 130.

[0057] To ensure that the data displayed on the e-ink screen display module 140 is closest to the data of the all-electronic water meter when it stops operating due to the depletion of the power of the power module 150. In another embodiment of the present invention, when the power module 150 is about to run out of power, the main control unit 120 stores the latest flow data in the storage module 130 and updates the data displayed on the e-ink screen display module 140 to the latest flow data. It should be noted that during the process of the e-ink screen display module 140 updating the data, the main control unit 120 can actively transmit the latest flow data to the e-ink screen display module 140 for display. In addition, the main control unit 120 can also store the latest flow data in the storage module 130, and then the e-ink screen display module 140 obtains the latest flow data from the storage module 130 for display.

[0058] Referring to Figure 2 , in an embodiment of the present invention, the all-electronic water meter further includes:

[0059] A power module 150, connected to the main control unit 120, for supplying power to the main control unit 120;

[0060] A power detection circuit 160, with its first end connected to the output end of the power module 150 and its second end connected to the main control unit 120, for detecting the output voltage value of the power module 150 and outputting it to the main control unit;

[0061] The main control unit 120 is further configured to adjust the refresh rate of the e-ink screen display module 140 according to the output voltage value of the power module 150; wherein, when the output voltage value is less than a preset voltage value, the main control unit 120 stops the refresh of the e-ink screen.

[0062] In this embodiment, the power supply module 150 may include a battery or a super capacitor, serving as an energy storage unit. The power of the power supply module 150 continuously decreases as the all-electronic water meter operates, and its output voltage also decreases as the power continuously decreases. Moreover, the controller in the main control unit 120 needs to be within the working voltage range to work properly; when the voltage of the power supply module 150 is less than the minimum working voltage of the controller, the controller stops working, and the display data in the ink screen display module 140 cannot be updated; at this time, the all-electronic water meter loses the function of displaying the water flow rate and flow. Therefore, the power detection circuit 160 can detect the output voltage value of the power supply module 150 and judge this output voltage value. When the output voltage value is less than a preset voltage value, it can be determined that the all-electronic water meter is about to lose power and lose the function of displaying the water flow rate and flow. It should be noted that the preset voltage value needs to be greater than the minimum working voltage of the controller in the main control unit 120, and the preset voltage value can be determined by the R & D personnel according to the experimental results. It should be noted that in this embodiment, the power supply module 150 supplies power to the main control unit 120, and the main control unit 120 supplies power to other circuits or modules connected thereto. In other embodiments of the present utility model, the power supply module 150 may not only supply power to the main control unit 120; the power supply module 150 may be connected to all devices, units, circuits or modules that require electrical energy to operate in the all-electronic water meter and supply power to them.

[0063] It is easy to understand that the power consumption of the ink screen in the high refresh rate state is greater than that in the low refresh rate state. In order to extend the service time of the all-electronic water meter 10, in this solution, the main control unit 120 can adjust the refresh rate of the ink screen display module 140 according to the output voltage of the power supply module 150; wherein, the refresh rate of the ink screen display module 140 is positively correlated with the output voltage of the power supply module 150; the higher the output voltage, the higher the refresh rate.

[0064] When the output voltage value detected by the power detection circuit 160 is less than the preset voltage value, a low power signal can be output to the main control unit 120, so that the main control unit 120 outputs a stop refresh instruction to the ink screen display module 140 to update the display content of the ink screen display module 140, so as to enable the all-electronic water meter to update and display the water flow rate and flow data in time before power-off.

[0065] The power detection circuit 160 may include a resistor voltage division circuit for voltage division detection of the output voltage of the power supply module 150. The low power signal can be a level signal or a data stream after encoding.

[0066] In an embodiment of the present utility model, the main control unit 120 is further configured to store the flow rate data in the storage module 130 after obtaining the flow rate data of the water body.

[0067] It is easy to understand that there is a limit to the amount of content simultaneously displayed by the e-ink display module 140, and generally the latest flow rate data and flow velocity data are displayed. The flow rate data and flow velocity data of past times need to be stored in the storage module 130 for the staff to retrieve, view, and analyze. In an embodiment of the present utility model, in order to reduce the power consumption of the all-electronic water meter; after the main control unit 120 obtains the flow rate data of the water body, it stores it in the internal memory; and transfers and stores the data stored in the internal memory to the storage module 130 at regular intervals, and clears the data in the internal memory. In order to avoid power failure before the all-electronic water meter transfers the data in the internal memory, resulting in data loss, the main control unit 120 stores the flow rate data in the storage module 130 when receiving the low power signal.

[0068] In an embodiment of the present utility model, the all-electronic water meter further includes:

[0069] A display driving unit 170, with the first end connected to the main control unit 120, the second end connected to the storage module 130, and the third end connected to the e-ink display module 140;

[0070] The main control unit 120 is configured to output a corresponding refresh rate adjustment instruction to the display driving unit 170 according to the output voltage value of the power supply module 150;

[0071] The display driving unit 170 reads the latest flow rate data stored in the storage module 130 at corresponding intervals according to the refresh rate adjustment instruction, and outputs it to the e-ink display module 140, so that the e-ink display module 140 displays the flow rate data.

[0072] In this embodiment, in order to increase the stability and reliability of data refreshing and displaying of the e-ink display module 140, the second end of the display driving unit 170 is connected to the storage module 130, and the third end is connected to the e-ink display module 140. It is easy to understand that the controller in the main control unit 120 not only undertakes to output flow data to the e-ink display module 140 for refreshing and displaying, but also undertakes other functions: for example, calculation, connection with the outside world through a wireless module, etc. There is a possibility that the controller runs away, which is not conducive to the all-electronic water meter to update and display the flow data in time. Therefore, in this embodiment, the display driving unit 170 is used to specifically read the corresponding storage block of the storage module 130 and output the latest stored flow data to the e-ink display module 140 for display. The display driving unit 170 may include an SOC as a control module.

[0073] The main control unit 120 is configured to output a corresponding refresh rate adjustment instruction to the display driving unit 170 according to the output voltage value of the power supply module 150; the display driving unit 170 reads the latest flow data stored in the storage module 130 at each corresponding time interval according to the refresh rate adjustment instruction and outputs it to the e-ink display module 140, so that the e-ink display module 140 displays the flow data. It is easy to understand that the data stored in the storage module 130 by the main control unit 120 includes not only flow data, but also other data; for example: flow rate and corresponding time. When reading the data of the storage module 130, the display driving unit 170 can read all the parameters specified by the R & D personnel for display; the display driving unit 170 continuously reads the storage module 130 and outputs the latest data to the e-ink display module 140; this can increase the stability and reliability of data refreshing and displaying of the e-ink display module 140. Outputting a corresponding refresh rate adjustment instruction to the display driving unit 170 according to the output voltage value of the power supply module 150 and controlling the refresh rate of the e-ink display module 140 can extend the service life of the all-electronic water meter.

[0074] It should be understood that the refresh rate adjustment instruction may include the interval time corresponding to the refresh rate, that is, the time interval between two adjacent readings of the latest flow data stored in the storage module 130 by the display driving unit 170.

[0075] Refer to Figure 3 In an embodiment of the present invention, the main control unit 120 is further configured to store the flow data in the storage module 130 when the output voltage value is less than a preset voltage value;

[0076] The all-electronic water meter further includes:

[0077] A display driving unit 170, with its first end connected to the main control unit 120, its second end connected to the storage module 130, and its third end connected to the ink screen display module 140;

[0078] The main control unit 120 is configured to output the obtained flow rate data of the water body to the display driving unit 170; the main control unit 120 is further configured to output a stop refresh instruction to the display driving unit 170 when the output voltage value is less than the preset voltage value;

[0079] The display driving unit 170 is configured to output the obtained flow rate data of the water body to the ink screen display module 140 after receiving it, so that the ink screen display module 140 displays the flow rate data;

[0080] Alternatively, when the display driving unit 170 receives the stop refresh instruction, it reads the latest flow rate data stored in the storage module 130 and outputs it to the ink screen display module 140, so that the ink screen display module 140 displays the flow rate data.

[0081] In this embodiment, the main control unit 120 stores the flow rate data in the storage module 130 only when the output voltage value of the power supply module 150 is less than the preset voltage value; and outputs a stop refresh instruction to the display driving unit 170, so that when the display driving unit 170 receives the stop refresh instruction, it reads the latest flow rate data stored in the storage module 130 and outputs it to the ink screen display module 140, so that the ink screen display module 140 displays the flow rate data.

[0082] When the output voltage value of the power supply module 150 is greater than or equal to the preset voltage value and in the case of the main control unit 120, after the main control unit 120 obtains the flow rate data of the water body, it directly outputs it to the display driving unit 170 to update the flow rate data displayed by the ink screen display module 140.

[0083] In this embodiment, when the output voltage of the power supply module 150 is greater than or equal to the preset voltage value, it means that the power is sufficient and there is no need to worry about the ink screen display module 140 suddenly losing power, resulting in the displayed flow rate data being too old, not updated in time, and the flow rate data being lost. Correspondingly, when the output voltage of the power supply module 150 is less than the preset voltage value, it means that the power is too low and the flow rate data needs to be saved in time and the flow rate data displayed by the ink screen display module 140 needs to be updated in time.

[0084] The preset voltage value can be determined by R & D personnel.

[0085] Refer toFigure 4 In an embodiment of the present utility model, the all-electronic water meter further includes:

[0086] A wireless communication module 180, connected to the main control unit 120;

[0087] The main control unit 120 is further configured to connect to an external device through the wireless communication module 180 and transmit the flow rate data to the external device.

[0088] In this embodiment, the all-electronic water meter further includes a wireless communication module 180. The main control unit 120 is connected to the wireless communication module 180 and can perform a wireless connection with an external device through the wireless communication module 180 to transmit data; for example, the power value detected by the power detection circuit 160 and the latest detected flow rate data, etc. The external device can be a user device terminal, a server or a repeater. Thus, it is convenient for staff to detect the state of the all-electronic water meter and the flow state of the pipeline where it is installed according to the data output by the all-electronic water meter.

[0089] The wireless communication module 180 may include a Bluetooth module, a low-power Bluetooth module, a WiFi module or a ZigBee module, etc.

[0090] In an embodiment of the present utility model, the external device includes a server or a mobile terminal. Among them, the mobile terminal may include a mobile phone, a computer, an IPAD or a smart water meter, etc. After the main control unit transmits the flow rate data to the server through the wireless communication module 180, the server transmits the flow rate data to the user terminal or the water service enterprise.

[0091] In an embodiment of the present utility model, the wireless communication module 180 includes: a Bluetooth communication unit, communicatively connected to the main control unit 120, for performing a Bluetooth connection with an external device, so that the main control unit 120 transmits flow rate data to the external device.

[0092] The above are only optional embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. An all-electronic water meter that still displays data in a power-off state, characterized in that, The all - electronic water meter includes: A flow measurement module for detecting the volumetric flow rate of water in the pipeline; A main control unit connected to the output end of the flow measurement module for receiving the flow data measured by the flow measurement module; An e - ink display module connected to the main control unit; After obtaining the flow data of the water body, the main control unit displays the flow data on the e - ink display module; specifically, the main control unit transmits the flow data to the e - ink display module for display; The all - electronic water meter further includes: A power supply module connected to the main control unit for supplying power to the main control unit; A power detection circuit, with the first end connected to the output end of the power supply module and the second end connected to the main control unit, for detecting the output voltage value of the power supply module and outputting it to the main control unit; The main control unit is further configured to stop the refresh of the e - ink screen when the output voltage value is less than a preset voltage value.

2. The all-electronic water meter that still displays data in the power-off state as claimed in claim 1, wherein The flow measurement module includes a mechanical electromechanical sampling device and / or an ultrasonic flow measurement device.

3. The all - electronic water meter that still displays data in a power - off state as claimed in claim 1, wherein, The all - electronic water meter further includes: A storage module connected to the main control unit and the e - ink display module respectively for storing data.

4. The all-electronic water meter that still displays data in a power-off state as claimed in claim 3, wherein The main control unit is further configured to store the flow data in the storage module after obtaining the flow data of the flow measurement module.

5. The all-electronic water meter that still displays data in the power-off state as claimed in claim 4, wherein The main control unit is further configured to store the flow data in the storage module when the output voltage value is less than a preset voltage value; The all - electronic water meter further includes: A display driving unit, with the first end connected to the main control unit and the second end connected to the e - ink display module; The main control unit is configured to output it to the display driving unit after obtaining the flow data of the water body; the main control unit is further configured to output a stop refresh instruction to the display driving unit when the output voltage value is less than the preset voltage value; The display driving unit is configured to output it to the e - ink display module after receiving the flow data of the water body, so that the e - ink display module displays the flow data; Alternatively, when the display driving unit receives the stop refresh instruction, it reads the latest flow data stored in the storage module and outputs it to the e - ink display module, so that the e - ink display module displays the flow data.

6. The all-electronic water meter that still displays data in a power-off state according to any one of claims 1 to 5, characterized in that The all - electronic water meter further includes: A wireless communication module connected to the main control unit; The main control unit is further configured to connect to an external device through the wireless communication module and transmit the flow data to the external device.

7. The all-electronic water meter that still displays data in a power-off state according to claim 6, wherein The external device includes a server.

8. The all-electronic water meter that still displays data in the power-off state as claimed in claim 6, wherein The wireless communication module includes: A Bluetooth communication unit communicatively connected to the main control unit for performing a Bluetooth connection with an external device, so that the main control unit transmits the flow data to the external device.

Images