Water meter power supply system and management method thereof

Abstract

The present application relates to the technical field of intelligent water meter, especially to a water meter power supply system and its management method, the water meter power supply system comprises an MCU control assembly, a power supply system in communication connection with the MCU control assembly, a battery plug-in detection circuit, a battery activation and capacity detection circuit and a power real-time power supply capability detection circuit, the power supply system comprises a battery and a capacitor in parallel with the battery; the battery plug-in detection circuit is used for detecting whether the battery is powered on or powered off; the battery activation and capacity detection circuit activates the battery first and then detects the battery capacity, and the power real-time power supply capability detection circuit detects the power supply capability of the power supply system, and the present application further provides a management method thereof, comprising the following steps: step one, judging whether the battery is powered on or powered off; step two, detecting the battery capacity; and step three, detecting the power real-time power supply capability; the management method can improve the water use experience of users, reduce the cost of replacing the battery, and improve the management level and efficiency.

Description

Technical Field

[0001] This invention relates to the field of smart water meter technology, and in particular to a water meter power supply system and its management method. Background Technology

[0002] Smart water meters are becoming increasingly widely used, and most smart water meters on the market are powered by batteries. The main reason for choosing battery power instead of a power source is that even in the event of a power outage, the user's water supply will not be affected. There are two types of batteries for water meters: lithium-ion batteries and dry cell batteries. Considering the working environment of water meters, which may involve high temperatures and humidity, as well as environmental pollution, most meters use lithium-ion batteries.

[0003] While lithium-ion batteries offer significant convenience, their inherent characteristics and improper management can lead to several issues. These include: environmental factors like low temperatures causing false alarms of a dead battery; high-current situations such as valve closures or communication failures causing false alarms of a dead battery; and poor management practices such as incorrect low-power warnings or valve closure timing. All of these can directly impact water usage. Existing water meters suffer from unstable power supplies; reversed battery connections can damage the circuit, making it impossible to determine battery level and potentially causing passivation and a failure to provide a stable power supply. Patent application number 202020963843.2 describes a power management circuit for a smart water meter. However, this circuit cannot activate the battery, resulting in a short battery lifespan. Furthermore, it lacks real-time monitoring and detection capabilities for both the power supply and the battery. Summary of the Invention

[0004] To address the problems existing in the above-mentioned background technology, the present invention provides a water meter power supply system and its management method.

[0005] To achieve the above objectives, this invention proposes a water meter power supply system and its management method. The water meter power supply system includes: an MCU control component, a power supply system communicatively connected to the MCU control component, a battery insertion / removal detection circuit, a battery activation and capacity detection circuit, and a real-time power supply capability detection circuit. The power supply system includes a battery and a capacitor connected in parallel with the battery. The battery insertion / removal detection circuit detects the battery status. The battery activation and capacity detection circuit activates the battery and detects its capacity. The real-time power supply capability detection circuit detects the power supply capability of the power supply system.

[0006] Furthermore, the power supply system includes a socket XS1, a battery, capacitor C1, capacitor C2, and diode V3;

[0007] Pin 1 of the socket XS1 is connected to the positive terminal of the diode V3, and the battery is connected between pin 1 of the socket XS1 and the positive terminal of the diode V3.

[0008] Pin 2 of the socket XS1 is grounded;

[0009] A capacitor C1 and a capacitor C2 are connected in parallel between pin 2 of the socket XS1 and the negative terminal of the diode V3.

[0010] A jumper switch is provided on the circuit connecting capacitor C1 and the negative terminal of diode V3.

[0011] Furthermore, the battery insertion / removal detection circuit includes a voltage detection chip V722 and a diode V3;

[0012] Pin 3 of the voltage detection chip V722 is connected to the battery;

[0013] Pin 2 of the voltage detection chip V722 is grounded;

[0014] Pin 1 of the voltage detection chip V722 is connected to the positive terminal of diode V35;

[0015] The negative terminal of diode V35 is connected to the IO interface of the MCU control component.

[0016] Furthermore, the battery activation and capacity detection circuit includes a CHECK-BAR1 control terminal, transistors V10 and V13, resistors R30, R32, and R43;

[0017] The emitter of transistor V10 is connected to the positive terminal of the battery. The collector of transistor V10 is connected to resistor R32. Resistor R32 and resistor R43 are connected in series. Resistor R43 is connected to the emitter of transistor V13, and the emitter of transistor V13 is grounded. The collector of transistor V13 is connected to resistor R30. The other end of resistor R30 is connected to the base of transistor V10. The base of transistor V13 is connected to the CHECK-BAR1 control terminal. The CHECK-BAR1 control terminal is connected to the MCU control component. An A / D converter is connected between resistor R32 and resistor R43 to obtain the battery voltage value.

[0018] Furthermore, the real-time power supply capability detection circuit includes a CHECK-BAR control terminal, transistor V1, transistor V5, resistor R1, resistor R5, and resistor R8;

[0019] The emitter of transistor V1 is connected to the positive terminal of the battery, the collector of transistor V1 is connected to resistor R1, resistor R1 is connected in series with resistor R8, resistor R8 is connected to the emitter of transistor V5, the emitter of transistor V5 is grounded, the collector of transistor V5 is connected to resistor R5, the other end of resistor R5 is connected to the base of transistor V1, the base of transistor V5 is connected to the CHECK-BAR control terminal, the CHECK-BAR control terminal is connected to the MCU control component, and an A / D converter is connected between resistor R1 and resistor R8 to obtain the voltage value of the power supply system.

[0020] Furthermore, the present invention also provides a management method for a water meter power supply system as described above, comprising the following steps:

[0021] Step 1: Determine if the battery is connected to power or disconnected from power: The battery insertion / removal detection circuit detects whether the battery is powered on or off. If it is powered on, the battery is activated and its capacity is checked; if it is disconnected from power, the data is saved, the valve is closed, and the device enters standby mode.

[0022] Step 2: Activate the battery; after the battery is powered on in Step 1, the battery activation and capacity detection circuit will activate the battery.

[0023] Step 3: Check battery capacity: After completing step 2, check the battery capacity to confirm the battery capacity and determine whether the battery capacity is qualified. If the battery capacity is qualified, the water meter is ready to start working; if the battery capacity is unqualified, it enters standby mode.

[0024] Step 4: Real-time power supply capability testing: During the operation of the water meter, the power supply capability is monitored periodically.

[0025] Furthermore, in step one, an interrupt method is used to meet the water meter's need for rapid detection of power failure to perform various data processing and anti-interference processing, as well as the need for low power consumption to ensure battery life.

[0026] Furthermore, in step two, a discharge circuit is formed through a fixed resistor at fixed time intervals, based on the battery discharge curve, and the battery is continuously discharged for a fixed time to activate it.

[0027] Furthermore, in step three, at a fixed time after each battery activation, a discharge circuit is formed through a fixed resistor, the battery voltage value is obtained through A / D conversion, and the actual capacity of the battery is determined based on the battery's discharge curve.

[0028] Furthermore, in step four, the battery voltage value is monitored periodically in the first cycle during normal operation of the water meter; the battery voltage value is monitored periodically in the second cycle when the water meter performs a high-current operation.

[0029] Compared with the prior art, the beneficial effects of the technical solution of the present invention are as follows:

[0030] The water meter power supply system provided by this invention includes an MCU control component, a power supply system communicatively connected to the MCU control component, a battery insertion / removal detection circuit, a battery activation and capacity detection circuit, and a real-time power supply capability detection circuit. The power supply system includes a battery and a capacitor connected in parallel with the battery. The battery insertion / removal detection circuit is used to detect the battery status, specifically whether the battery is powered on or off. The battery activation and capacity detection circuit first activates the battery and then performs battery capacity detection. The real-time power supply capability detection circuit detects the power supply capability of the power supply system.

[0031] The water meter power management method provided by this invention can quickly power on and off the battery, activate the battery, detect its capacity, and detect its actual power supply capability, thereby achieving effective management of the water meter power supply. This management method can improve the user's water usage experience, reduce the cost of replacing batteries, and improve management level and efficiency. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0033] Figure 1 A schematic diagram of the water meter power supply system provided by the present invention;

[0034] Figure 2 This is a schematic diagram of the operation of the water meter provided by the present invention;

[0035] Figure 3 This is a schematic diagram of the management method for the water meter power supply system provided by the present invention;

[0036] Figure 4 A schematic diagram of the circuit principle of the power supply system provided by the present invention;

[0037] Figure 5 A schematic diagram of the battery insertion / removal detection circuit provided by the present invention;

[0038] Figure 6 A schematic diagram of the battery activation and capacity detection circuit provided by the present invention;

[0039] Figure 7 The circuit diagram of the real-time power supply capability detection circuit provided by the present invention is shown. Detailed Implementation

[0040] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0042] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] Example 1:

[0045] This invention proposes a water meter power supply system, such as... Figure 1 As shown, the water meter power supply system includes: an MCU control component, a power supply system communicatively connected to the MCU control component, a battery insertion / removal detection circuit, a battery activation and capacity detection circuit, and a real-time power supply capability detection circuit. The power supply system includes a battery and a capacitor connected in parallel with the battery. The battery insertion / removal detection circuit is used to detect the battery status, the battery activation and capacity detection circuit is used to activate the battery and detect the battery capacity, and the real-time power supply capability detection circuit is used to detect the power supply capability of the power supply system. The water meter power supply system provided by this invention includes an MCU control component, a power supply system communicatively connected to the MCU control component, a battery insertion / removal detection circuit, a battery activation and capacity detection circuit, and a real-time power supply capability detection circuit. The power supply system includes a battery and a capacitor connected in parallel with the battery. The battery insertion / removal detection circuit is used to detect the battery status, detecting whether the battery is powered on or off. The battery is first activated by the battery activation and capacity detection circuit, and then the battery capacity is detected. The real-time power supply capability detection circuit detects the power supply capability of the power supply system.

[0046] Furthermore, such as Figure 4 As shown, the power supply system is composed of a lithium-ion battery and capacitors. The power supply system includes a socket XS1, a battery, capacitors C1 and C2, and a diode V3. The socket XS1 is an HDR1x2 type, a two-pin socket. Pin 1 of the socket XS1 is connected to the positive terminal of diode V3, and a battery is connected between pin 1 of the socket XS1 and the positive terminal of diode V3. Pin 2 of the socket XS1 is grounded. Capacitors C1 and C2 are connected in parallel between pin 2 of the socket XS1 and the negative terminal of diode V3. A jumper switch is provided on the circuit connecting capacitor C1 and the negative terminal of diode V3.

[0047] Furthermore, such as Figure 5 As shown, the battery insertion / removal detection circuit includes a voltage detection chip V722 and a diode V3. Pin 3 of the voltage detection chip V722 is connected to the battery, and pin 3 of the voltage detection chip V722 is the VIN pin of the voltage detection chip V722. Pin 2 of the voltage detection chip V722 is grounded, and pin 2 of the voltage detection chip V722 is the VSS pin of the voltage detection chip V722. Pin 1 of the voltage detection chip V722 is connected to the positive terminal of the diode V35, and pin 1 of the voltage detection chip V722 is the VOUT pin of the voltage detection chip V722. The negative terminal of the diode V35 is connected to the IO interface of the MCU control component, and transmits the detected signal to the MCU control component.

[0048] Furthermore, such as Figure 6 As shown, the battery activation and capacity detection circuit includes a CHECK-BAR1 control terminal, transistors V10 and V13, resistors R30, R32, and R43. The emitter of transistor V10 is connected to the positive terminal of the battery, the collector of transistor V10 is connected to resistor R32, resistors R32 and R43 are connected in series, resistor R43 is connected to the emitter of transistor V13, the emitter of transistor V13 is grounded, the collector of transistor V13 is connected to resistor R30, the other end of resistor R30 is connected to the base of transistor V10, the base of transistor V13 is connected to the CHECK-BAR1 control terminal, the CHECK-BAR1 control terminal is connected to the MCU control component to transmit signals to the MCU control component, and an A / D converter is connected between resistors R32 and R43 to obtain the battery voltage value. The model of transistor V10 is LMBT4403, and the model of transistor V13 is LMBT4401LT1G.

[0049] Furthermore, such as Figure 7As shown, the real-time power supply capability detection circuit includes a CHECK-BAR control terminal, transistors V1 and V5, resistors R1, R5, and R8. The emitter of transistor V1 is connected to the positive terminal of the battery, and the collector of transistor V1 is connected to resistor R1. Resistors R1 and R8 are connected in series, and resistor R8 is connected to the emitter of transistor V5. The emitter of transistor V5 is grounded, and the collector of transistor V5 is connected to resistor R5. The other end of resistor R5 is connected to the base of transistor V1, and the base of transistor V5 is connected to the CHECK-BAR control terminal. The CHECK-BAR control terminal is connected to the MCU control component to transmit signals to it. An A / D converter is connected between resistors R1 and R8 to obtain the voltage value of the power supply system. The transistor V1 is an LMBT4403, and the transistor V5 is an LMBT4401LT1G.

[0050] Example 2:

[0051] Furthermore, such as Figure 2 As shown, the present invention also provides a management method for a water meter power supply system as described above, comprising the following steps:

[0052] Step 1: Determine if the battery is connected to power or disconnected from power: The battery insertion / removal detection circuit detects whether the battery is powered on or off. If it is powered on, the battery is activated and its capacity is tested. If it is disconnected from power, the instantaneous power supply capability is tested, and the capacitor's power is used to save water meter data and perform valve closing operations.

[0053] Step 2: Activate the battery; After the battery is powered on in Step 1, it is activated through the battery activation and capacity detection circuit. The "passivation" of the lithium ammonium battery is eliminated first to activate the battery.

[0054] Step 3: Check battery capacity: After completing step 2, check the battery capacity to confirm the battery capacity and determine whether the battery capacity is qualified. If the battery capacity is qualified, the water meter is ready to start working; if the battery capacity is unqualified, it enters standby mode.

[0055] Step 4: Real-time power supply capability testing: During the operation of the water meter, the power supply capability is monitored regularly to ensure smooth execution of daily operations of the water meter and high-current actions such as valve switching and communication.

[0056] Furthermore, such as Figure 5In the circuit diagram shown, the cathode of diode V35 is POWER-DOWN. POWER-DOWN in this circuit diagram is connected to the IO interface of the MCU control component. In step one, an interrupt method is used to meet the water meter's requirements for rapid power failure detection, various data processing, and anti-interference processing, as well as the requirement for low power consumption to ensure battery life. Specifically, it is normally in a low-power sleep state to ensure battery life; when a power failure occurs, an interrupt is generated to quickly detect the power failure event and perform various data processing and anti-interference processing.

[0057] Furthermore, in step two, battery activation is performed at fixed time intervals, based on the battery discharge curve, through... Figure 6 The circuit shown uses CHECK-BAR1 control. The power supply, transistor V10, resistor R32, and resistor R43 form a heavy-load current discharge circuit. By forming a discharge circuit through a fixed resistor, the battery is continuously discharged for a fixed time to activate it and avoid false alarms of insufficient battery power.

[0058] Furthermore, in step three, at a fixed time after each battery activation, the same heavy-load current discharge circuit is activated to discharge the battery. A discharge circuit is formed through a fixed resistor. During the discharge process, the battery voltage value is obtained through A / D conversion. Based on the battery discharge curve, the actual capacity of the battery is determined. If the battery capacity is qualified, step four is performed. If the battery capacity is unqualified, the data is saved, the valve is closed, and the battery enters standby mode.

[0059] Furthermore, in step four, refer to Figure 2 As shown, after completing the battery capacity test in step three, if the battery capacity is qualified, a real-time power supply capability test is performed to determine whether it is time for the second or first cycle test. If it is time for the second cycle test, the water meter monitors the battery voltage value periodically during normal operation using the first cycle, which is a slow cycle ranging from 2s to 5s. During daily operation, the water meter monitors the battery voltage value periodically using a slow cycle, such as 5s, to ensure normal operation. If it is time for the first cycle test, the water meter monitors the battery voltage value periodically using the second cycle when performing high-current actions. The second cycle is a fast cycle ranging from 250ms to 300ms. When performing high-current actions, such as valve switching and communication, the battery voltage value is monitored periodically using a fast cycle, such as 250ms. If the voltage is too low, the high-current action must be stopped to ensure that the power supply voltage is not pulled down, causing MCU control reset or abnormal water meter operation. Figure 7 In the power supply real-time power supply capability detection circuit shown, the power supply, transistor V1, resistors R1 and R8 form a light-load circuit through CHECK-BAR control. The voltage value of the power supply is obtained through A / D conversion, and the real-time power supply capability is evaluated based on the voltage value to ensure the normal operation of the water meter.

[0060] The water meter power management method provided by this invention can quickly power on and off the battery, activate the battery, detect its capacity, and detect its actual power supply capability, thereby achieving effective management of the water meter power supply. This management method can improve the user's water usage experience, reduce the cost of replacing batteries, and improve management level and efficiency.

[0061] Additionally, a water meter equipped with a water meter power supply system as described above, such as... Figure 2 As shown, the MCU control component includes an MCU processing unit, a communication unit, an LCD unit, a power management control unit, a water volume signal processing unit, and a valve drive unit connected to the MCU processing unit. The water meter is equipped with a metering sensor and a valve. The valve drive mechanism drives the valve to open and close. The metering sensor is signal-connected to the water volume signal processing unit, and the valve drive mechanism is signal-connected to the valve drive unit. The power management control unit is connected to a battery.

[0062] It should be understood that the above description of specific embodiments of the present invention is only for illustrating the technical approach and features of the present invention, and is intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, the present invention is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of the present invention should be covered within the protection scope of the present invention.

Claims

1. A water meter power supply system, characterized in that, The device includes an MCU control component, a power supply system communicatively connected to the MCU control component, a battery insertion / removal detection circuit, a battery activation and capacity detection circuit, and a real-time power supply capability detection circuit. The power supply system includes a battery and a capacitor connected in parallel with the battery. The battery insertion / removal detection circuit is used to detect the battery status. The battery activation and capacity detection circuit is used to activate the battery and detect the battery capacity. The real-time power supply capability detection circuit is used to detect the power supply capability of the power supply system. During normal operation of the water meter, the battery voltage value is monitored periodically in the first cycle. When the water meter performs a high-current operation, it monitors the battery voltage value in a second cycle. The first cycle is a slow cycle, and the second cycle is a fast cycle. The duration of the second cycle is shorter than that of the first cycle.

2. The water meter power supply system according to claim 1, characterized in that, The power supply system includes a socket XS1, a battery, a capacitor C1, a capacitor C2, and a diode V3; Pin 1 of the socket XS1 is connected to the positive terminal of the diode V3, and the battery is connected between pin 1 of the socket XS1 and the positive terminal of the diode V3. Pin 2 of the socket XS1 is grounded; A capacitor C1 and a capacitor C2 are connected in parallel between pin 2 of the socket XS1 and the negative terminal of the diode V3. A jumper switch is provided on the circuit connecting capacitor C1 and the negative terminal of diode V3.

3. The water meter power supply system according to claim 2, characterized in that, The battery insertion / removal detection circuit includes a voltage detection chip V722 and a diode V3; Pin 3 of the voltage detection chip V722 is connected to the battery; Pin 2 of the voltage detection chip V722 is grounded; Pin 1 of the voltage detection chip V722 is connected to the positive terminal of diode V35; The negative terminal of diode V35 is connected to the IO interface of the MCU control component.

4. The water meter power supply system according to claim 1, characterized in that, The battery activation and capacity detection circuit includes a CHECK-BAR1 control terminal, transistors V10 and V13, resistors R30, R32, and R43. The emitter of transistor V10 is connected to the positive terminal of the battery. The collector of transistor V10 is connected to resistor R32. Resistor R32 and resistor R43 are connected in series. Resistor R43 is connected to the emitter of transistor V13, and the emitter of transistor V13 is grounded. The collector of transistor V13 is connected to resistor R30. The other end of resistor R30 is connected to the base of transistor V10. The base of transistor V13 is connected to the CHECK-BAR1 control terminal. The CHECK-BAR1 control terminal is connected to the MCU control component. An A / D converter is connected between resistor R32 and resistor R43 to obtain the battery voltage value.

5. The water meter power supply system according to claim 1, characterized in that, The real-time power supply capability detection circuit includes a CHECK-BAR control terminal, transistor V1, transistor V5, resistor R1, resistor R5, and resistor R8. The emitter of transistor V1 is connected to the positive terminal of the battery, the collector of transistor V1 is connected to resistor R1, resistor R1 is connected in series with resistor R8, resistor R8 is connected to the emitter of transistor V5, the emitter of transistor V5 is grounded, the collector of transistor V5 is connected to resistor R5, the other end of resistor R5 is connected to the base of transistor V1, the base of transistor V5 is connected to the CHECK-BAR control terminal, the CHECK-BAR control terminal is connected to the MCU control component, and an A / D converter is connected between resistor R1 and resistor R8 to obtain the voltage value of the power supply system.

6. A management method for a water meter power supply system as described in any one of claims 1-5, characterized in that, Includes the following steps: Step 1: Determine if the battery is connected to power or disconnected from power: The battery insertion / removal detection circuit detects whether the battery is powered on or off. If it is powered on, the battery is activated and its capacity is checked; if it is disconnected from power, the data is saved, the valve is closed, and the device enters standby mode. Step 2: Activate the battery; after the battery is powered on in Step 1, the battery activation and capacity detection circuit will activate the battery. Step 3: Check battery capacity: After completing step 2, check the battery capacity to confirm the battery capacity and determine whether the battery capacity is qualified. If the battery capacity is qualified, the water meter is ready to start working; if the battery capacity is unqualified, it enters standby mode. Step 4: Real-time power supply capability testing: During the operation of the water meter, the power supply capability is monitored periodically.

7. The management method for the water meter power supply system according to claim 6, characterized in that, Step one employs an interrupt method to meet the water meter's requirements for rapid power-off detection, various data processing, and anti-interference measures, as well as to ensure battery lifespan with low power consumption.

8. The management method for the water meter power supply system according to claim 6, characterized in that, In step two, a discharge circuit is formed through a fixed resistor based on the battery discharge curve at a fixed time interval, and the battery is continuously discharged for a fixed time to activate it.

9. The management method for the water meter power supply system according to claim 7, characterized in that, In step three, at a fixed time after each battery activation, a discharge circuit is formed through a fixed resistor. The battery voltage value is obtained through A / D conversion, and the battery's true capacity is determined based on the battery's discharge curve.

Images