NB water meter counter and water meter

Abstract

The application relates to an NB water meter counter, belonging to the technical field of water meters, which comprises a flow sensor, a control module, a power module, a control switch, a rotation monitoring assembly and a driving assembly; the driving assembly is used for providing auxiliary driving when an impeller does not respond to water flow; the driving assembly is connected with the control switch; the control switch is connected with the control module; the control module is connected with the power module; the flow sensor is used for detecting water flow changes; the rotation monitoring assembly is used for detecting whether the impeller rotates; the control module is used for comparing the water flow changes detected by the flow sensor with the detection results of the rotation monitoring assembly; when it is detected that there is water flow but the impeller does not rotate synchronously, the control module controls the control switch to be closed so that the driving assembly drives the main shaft to rotate; and the power module provides operation power for the driving assembly, the flow sensor and the control module. The application has the effect of improving the accurate metering of the NB water meter under various water use states.

Description

Technical Field

[0001] This application relates to the field of water meter technology, and in particular to an NB water meter counter and a water meter. Background Technology

[0002] With the development of smart cities and IoT technologies, NB-IoT (Narrowband Internet of Things) water meters, as important terminal devices for remote meter reading and intelligent water management, have been widely used in various buildings and public facilities. NB water meters typically use built-in sensors and communication modules to achieve real-time monitoring and remote uploading of water consumption, improving meter reading efficiency and data accuracy.

[0003] In existing NB water meter counter structures, mechanical impellers are commonly used as the main component for sensing water flow. The impeller rotates driven by the water flow, which in turn drives the gear assembly to achieve counting indication and code output. However, under conditions of low flow or intermittent dripping, the impeller may fail to rotate properly due to insufficient water impact force, making it difficult to overcome its own rotational inertia and bearing friction. This results in inaccurate measurement or transmission of actual water usage, affecting metering accuracy. Summary of the Invention

[0004] To improve the accuracy of NB water meters under various water usage conditions, this application provides an NB water meter counter and a water meter.

[0005] The NB water meter counter provided in this application adopts the following technical solution: An NB water meter counter includes a main shaft, a gear set, a pointer set, a digit counter, an encoder disk, and an NB transmitting device. The main shaft is coaxially connected to an impeller. The main shaft controls the operation of the gear set, which drives the pointer set to display water consumption in liters. The gear set controls the operation of the digit counter to display water consumption in cubic meters. The gears drive the encoder disk to rotate. The NB transmitting device receives the rotation changes of the encoder disk, generates a digital signal representing water consumption, and uploads it. The counter also includes a flow sensor, a control module, a power module, a control switch, a rotation monitoring component, and a drive component. The drive assembly provides auxiliary drive when the impeller does not respond to water flow. The drive assembly is connected to the control switch, the control switch is connected to the control module, and the control module is connected to the power module. The flow sensor detects changes in water flow, and the rotation monitoring assembly detects whether the impeller is rotating. The control module compares the changes in water flow detected by the flow sensor with the detection results of the rotation monitoring assembly. When water flow is detected but the impeller is not rotating synchronously, the control module controls the control switch to close so that the drive assembly drives the main shaft to rotate. The power module provides operating power to the drive assembly, the flow sensor, and the control module.

[0006] By adopting the above technical solution, when a user turns on the water-using equipment, the water supply system generates water flow. The water flow first enters the NB water meter and acts on the impeller. Under normal circumstances, the water flow impacts the impeller, causing it to rotate. The impeller drives the gear set to rotate via a coaxially connected main shaft, which in turn drives the digit pointer group and the digit counter to mechanically display the water consumption in liters and cubic meters, respectively. Simultaneously, the gear set also drives the encoder disc to rotate. Changes in the encoder disc's rotation are sensed in real time by the NB transmitter and converted into digital signals, which are then uploaded to a remote system for data acquisition and monitoring.

[0007] During system operation, the flow sensor monitors the water flow status in real time and transmits the detected flow signal to the control module. Simultaneously, the rotation monitoring component senses the actual rotation status of the impeller and sends a feedback signal of impeller rotation to the control module. When the flow sensor detects water flow but the monitoring component does not return a signal indicating impeller rotation, the control module determines that it is currently in a state of "minimal water flow and impeller not rotating." At this point, the control module will start timing from this abnormal state and record the cumulative drainage volume. If this state continues for a certain period, i.e., the cumulative drainage volume reaches the measurement unit corresponding to the smallest scale of the pointer group, the control module will close the control switch, activate the drive circuit, and provide short-term rotational power to the spindle, causing the corresponding smallest scale pointer in the pointer group to jump one unit, thus achieving physical measurement compensation for this minimal drainage volume. If the impeller resumes normal rotation before the abnormal state accumulates to the minimum range, the control module will record the current accumulated leakage and continue monitoring. When the subsequent leakage accumulates to the minimum scale unit, the control switch will be triggered to close once, driving the spindle to complete one compensation jump, and then the switch will be immediately disconnected.

[0008] This NB water meter counter system achieves "full measurement" through hardware and software collaboration, ensuring that water usage is accurately recorded and uploaded even under the smallest water flow conditions, while maintaining high accuracy, low power consumption, and high reliability.

[0009] Optionally, it also includes a power generation component, which is used to convert the kinetic energy of the spindle rotation into electrical energy and store it in the power module.

[0010] By adopting the above technical solution, kinetic energy is generated during the rotation of the impeller with the water flow, and it is converted into electrical energy and stored in the power module to power the NB water meter system without the need for an external power source.

[0011] Optionally, the drive assembly includes a stator base and a rotor base. The rotor base is coaxially mounted on the main shaft and sleeved inside the stator base. The control switch includes multiple MOS switching transistors. The coils of the stator base correspond one-to-one with and are connected to the MOS switching transistors. The control module is an MCU module. All the MOS switching transistors are connected to the MCU module. The rotation monitoring assembly is used to detect the angular position of the rotor base in real time and transmit the detection signal to the MCU module. The MCU module controls the corresponding MOS switch to turn on according to the current angular position of the rotor base, so as to energize part of the stator coils to generate a rotating magnetic field in the stator base, thereby driving the rotor base to rotate continuously; The driving power source is a supercapacitor.

[0012] By adopting the above technical solution, the rotor seat is coaxially mounted on the main shaft, achieving a high degree of integration with the original water meter structure. The drive process requires minimal modification to the existing mechanical system, facilitating upgrades. A closed-loop drive logic is formed, encompassing position detection, logical judgment, and precise excitation, avoiding blind driving and over-driving, improving drive stability, and ensuring that the pointer does not misjump or overstep during compensation fluctuations.

[0013] Optionally, the rotation monitoring component includes a disk and several Wiegand sensors. The disk is coaxially connected to the spindle, and the several Wiegand sensors are arranged equidistantly along the circumference of the disk. The output of the Wiegand sensors is connected to the MCU module.

[0014] By adopting the above technical solution, due to the characteristics of the Wiegand sensor, when a certain polarity magnetic field parallel to the sensitive wire of the Wiegand sensor reaches the trigger magnetic induction intensity, the magnetic domains in the sensitive wire are excited and will move, and the magnetization direction will instantly turn to the same direction. At the same time, the magnetic field in the space around the sensitive wire will also change instantaneously. In this way, the Wiegand sensor can generate an electrical pulse. Multiple Wiegand sensors form multiple ordered pulse signals. The generation of pulse signals can be used as the basis for judging whether the spindle is rotating. Multiple ordered pulse signals can be used as the basis for the current rotation position of the spindle, that is, the rotation position of the rotor seat. In turn, the control module can determine to close the corresponding MOS switch to form a driving magnetic field that drives the rotor seat to rotate in the forward direction.

[0015] Wiegand sensors require no power supply and have a stable output signal. This detection structure features high precision, low power consumption, and non-contact angle recognition capabilities, supporting precise drive control logic and enhancing the metering accuracy and reliability of the entire smart water meter system.

[0016] Optionally, the power generation component includes a drive gear and a DC generator. The drive gear is coaxially fixed on the main shaft, and the DC generator is connected to a driven gear. The drive gear meshes with the driven gear, and the output end of the DC generator is connected to the power module for generating electricity and supplying power to the power module when the main shaft rotates.

[0017] Optionally, it also includes a mounting box, in which the MCU module, the MOS switch, the DC motor, and the supercapacitor are all mounted. The mounting box is provided with an interface for connecting to the Wiegand sensor and the stator base, and the passive gear is rotatably connected to the mounting box.

[0018] By adopting the above technical solution, key control and drive components such as MCU modules, MOS switches, DC motors and supercapacitors are integrated into a single package structure. At the same time, it is connected to Wiegand sensors, stator bases and mechanical structures through standardized interfaces, which effectively improves the system's integration, stability and maintenance convenience.

[0019] Optionally, the pointer group includes 4 pointers, the digit counter includes 5 digit wheels, and the gear group is also connected to a water flow indicator wheel.

[0020] By adopting the above technical solution, the "6-digit wheel + 3-digit pointer" display method is optimized to a "5-digit wheel + 4-digit pointer" combination. This reduces the number of decimal places displayed in red on the digit wheel, lowering the probability of reading ambiguity and equipment misjudgment. Simultaneously, the addition of a pointer display ensures accurate indication even for minute flow rates, avoiding the risk of missed counts due to low flow rates failing to drive the digit wheel. This structural optimization significantly improves the recognition accuracy and first-pass yield of the NB base meter during initial inspection, enhancing the overall performance stability and lifespan of the meter.

[0021] This application also provides an NB water meter using the following technical solution: An NB water meter, employing the aforementioned NB water meter counter, includes a housing. An upper mounting base is installed within the housing, and a lower mounting base is connected to the upper mounting base. A gear set, a digit wheel set, and a pointer set are all installed within the upper mounting base. One end of a main shaft is located within the upper mounting base, and the other end is located within the lower mounting base. An impeller is located within the lower mounting base. The lower mounting base has several water passage holes. A flow sensor is installed at the water outlet of the housing. A mounting groove is formed at the bottom of the upper mounting base, and a mounting box is located within the mounting groove. An installation space is reserved between the mounting base and the main shaft. The upper mounting base has several first wire-passing holes communicating with the installation space. The Wiegand sensor, the disk, the rotor seat, the stator seat, and the drive gear are all located within the installation space. The coils of the Wiegand sensor and the stator seat are electrically connected to the mounting box through the first wire-passing holes. The shaft of the DC generator passes through the mounting box and through the bottom wall of the mounting groove. A sealing ring is provided inside the upper mounting base. The sealing ring is fitted on the main shaft and located below the installation space.

[0022] By adopting the above technical solution, a high degree of integration is achieved by setting an installation space between the upper mounting base and the spindle, and integrating the rotation monitoring component and the drive component within the installation space.

[0023] Optionally, the flow sensor uses wired transmission, and a second wire hole is provided on the outer side wall of the upper mounting base, through which the flow sensor is electrically connected to the mounting box.

[0024] Optionally, a support ring is threaded onto the housing, a dial is hinged onto the support ring, and the NB transmitting device is mounted on the support ring.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. This NB water meter counter system achieves "full measurement" through hardware and software collaboration, ensuring that water usage is accurately recorded and uploaded even under the smallest water flow conditions, while maintaining high accuracy, low power consumption, and high reliability. 2. Kinetic energy is generated as the impeller rotates with the water flow, and this energy is converted into electrical energy and stored in the power module to power the NB water meter system, eliminating the need for an external power source. 3. The rotor seat is coaxially mounted on the main shaft, achieving high integration with the original water meter structure. The drive process requires minimal modification to the existing mechanical system, facilitating upgrades. It forms a closed-loop drive logic of position detection, logical judgment, and precise excitation, avoiding blind drive and overdrive, improving drive stability, and ensuring that the pointer does not misjump or overstep during compensation fluctuations. 4. The Wiegand sensor requires no power supply and has a stable output signal. This detection structure has high precision, low power consumption, and non-contact angle recognition capabilities, which can support precise drive control logic and enhance the metering accuracy and reliability of the entire smart water meter system.

[0026] 5. The "6-digit wheel + 3-digit pointer" display method has been optimized to a "5-digit wheel + 4-digit pointer" combination. This reduces the number of decimal places displayed in red on the digit wheel, lowering the probability of reading ambiguity and equipment misjudgment. Simultaneously, the addition of a pointer display ensures accurate indication even for minute flow rates, avoiding the risk of missed readings due to low flow not driving the digit wheel. This structural optimization significantly improves the recognition accuracy and first-pass yield of the NB base meter during initial inspection, enhancing the overall performance stability and lifespan of the meter. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0028] Figure 2 This is a schematic diagram illustrating the structure of the NB transmitting device, gear set, pointer set, and digit wheel counter in the embodiments of this application.

[0029] Figure 3 This is a schematic diagram illustrating the structure of the mounting box, drive assembly, and power generation assembly in the embodiments of this application.

[0030] Figure 4 This is a schematic diagram illustrating the structure of the driving component in an embodiment of this application.

[0031] Figure 5 This is a schematic diagram illustrating the structure of the control module, power module, and control switch in an embodiment of this application.

[0032] Figure 6 This is a schematic diagram illustrating the structure of the rotation monitoring component in an embodiment of this application.

[0033] Figure 7 This is a schematic diagram illustrating a pulse signal in an embodiment of this application.

[0034] Figure 8 This is a flowchart illustrating the principle of an embodiment of this application.

[0035] Figure 9 yes Figure 1 An enlarged schematic diagram of part A in the middle.

[0036] Explanation of reference numerals in the attached drawings: 11. Main shaft; 12. Gear set; 13. Pointer set; 14. Dial counter; 15. Encoder disk; 16. NB transmitter; 17. Impeller; 18. Mounting disk; 19. Water flow indicator wheel; 21. Mounting box; 22. Flow sensor; 23. Control module; 231. MCU module; 24. Power module; 241. Supercapacitor; 25. Control switch; 251. MOS switch; 3. Rotation monitoring assembly; 31. Disk disk; 33. Wiegand sensor; 4. Drive assembly; 41. Stator base; 42. Rotor base; 5. Generator assembly; 51. Drive gear; 52. Driven gear; 53. DC generator; 6. Housing; 7. Upper mounting base; 71. Mounting slot; 72. Mounting space; 73. First wire hole; 74. Second wire hole; 75. Sealing ring; 8. Lower mounting base; 81. Water passage hole; 91. Support ring; 92. Dial. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0038] This application discloses an NB water meter counter.

[0039] like Figure 1 , Figure 2 and Figure 3 The NB water meter counter includes a main shaft 11, a gear set 12, a pointer set 13, a digit counter 14, an encoder disk 15, and an NB transmitter 16. The main shaft 11 is coaxially connected to an impeller 17. The main shaft 11 controls the operation of the gear set 12, which drives the pointer set 13 to display the water consumption in liters. The gear set 12 controls the operation of the digit counter 14 to display the water consumption in cubic meters. The gear set 12 drives the encoder disk 15 to rotate. The NB transmitter 16 is used to receive the rotation changes of the encoder disk 15, generate a digital signal representing the water consumption, and upload it.

[0040] In this embodiment of the application, the gear set 12 includes gears Z01, Z02, Z03, Z04, Z05, Z06, Z07, Z08, Z09, Z10, Z11, Z12, Z13, Z14, Z15, Z16, Z17, Z18, and Z19.

[0041] Gear Z01 meshes with gear Z02, gear Z03 meshes with gear Z04, gear Z05 meshes with gear Z06, gear Z07 meshes with gear Z08, gear Z09 meshes with gear Z10, gear Z11 meshes with gear Z12, gear Z13 meshes with gear Z14, gear Z15 meshes with gear Z16, gear Z17 meshes with gear Z18, and gear Z05 meshes with gear Z19. Gears Z02 and Z03 are coaxial, gears Z04 and Z05 are coaxial, gears Z06 and Z07 are coaxial, gears Z08 and Z09 are coaxial, gears Z10 and Z11 are coaxial, gears Z12 and Z13 are coaxial, gears Z14 and Z15 are coaxial, and gears Z16 and Z17 are coaxial.

[0042] The main shaft 11 is coaxial with gear Z01. The pointer group 13 includes 4 digit wheels, one digit wheel is coaxial with gear Z19, one digit wheel is coaxial with gear Z10, one digit wheel is coaxial with gear Z13, and one digit wheel is coaxial with gear Z18. Gear Z02 is coaxially connected to a water flow indicator wheel 19. The encoder disk 15 is coaxial with gear Z05. Gear Z18 is also coaxially connected to a worm gear. The digit wheel counter 14 is an existing mechanical counter with 5 digit wheels. The main shaft 11 of the digit wheel counter 14 is connected to a worm, and the worm meshes with the worm gear.

[0043] The gear set 12 and the digit counter 14 are mounted on a mounting plate 18.

[0044] like Figure 3 , Figure 4 and Figure 5 It also includes a mounting box 21, a flow sensor 22 and a rotation monitoring component 3. The mounting box 21 contains a control module 23, a power module 24, a control switch 25, a drive component 4 and a power generation component 5. The drive assembly 4 is used to provide auxiliary drive when the impeller 17 does not respond to the water flow. The drive assembly 4 is connected to the control switch 25, the control switch 25 is connected to the control module 23, and the control module 23 is connected to the power module 24. The flow sensor 22 is used to detect changes in water flow. The rotation monitoring assembly 3 is used to detect whether the impeller 17 is rotating. The control module 23 is used to compare the changes in water flow detected by the flow sensor 22 with the detection results of the rotation monitoring assembly 3. When water flow is detected but the impeller 17 is not rotating synchronously, the control module 23 controls the control switch 25 to close so that the drive assembly 4 drives the main shaft 11 to rotate. The power module 24 provides operating power for the drive assembly 4, the flow sensor 22, and the control module 23. The generator assembly 5 is used to convert the kinetic energy of the rotation of the main shaft 11 into electrical energy and store it in the power module 24. The flow sensor 22 is a wired MEMS flow sensor 22, specifically a MEMS thermal flow sensor 22 or a MEMS piezoresistive flow sensor 22. The control module 23 is an MCU module 231, the control switch 25 is a MOS switch 251, and the driving power supply is a supercapacitor 241.

[0045] like Figure 4The drive assembly 4 includes a stator base 41 and a rotor base 42. The rotor base 42 is coaxially mounted on the main shaft 11 and sleeved inside the stator base 41. In this embodiment, the rotor base 42 is a ring-shaped permanent magnet, i.e., it has only one S pole and one N pole. The stator base 41 has a ring-shaped sleeve composed of four iron cores, all of which are wound with coils. The winding patterns of adjacent coils are opposite, i.e., when the coils are energized. In other embodiments, the specific design of the rotor base 42 and the stator base 41 can also be designed according to the structure of the rotor and stator in the brushless DC motor.

[0046] like Figure 5 There are four MOS switches 251, each independently connected to a coil, and each MOS switch 251 is also connected to the MCU module 231. The MEMS flow sensor 22 is also connected to the MCU module 231. In other embodiments, the control module 23 can also be an existing module used to receive signals from an existing encoder and control the rotation of the motor.

[0047] like Figure 3 and Figure 5 The power generation component 5 includes a drive gear 51 and a DC generator 53. The drive gear 51 is coaxially fixed on the main shaft 11. The DC generator 53 is connected to a driven gear 52. The driven gear 52 is rotatably mounted on the outer bottom wall of the mounting box 21. The drive gear 51 meshes with the driven gear 52. The output end of the DC generator 53 is connected to the power module 24 to generate electricity and supply power to the supercapacitor 241 when the main shaft 11 rotates.

[0048] like Figure 6 The rotation monitoring component 3 includes a disk 31 and several Wiegand sensors 33. The disk 31 is coaxially connected to the spindle 11. The several Wiegand sensors 33 are arranged at equal intervals along the circumference of the disk 31. The output terminals of the Wiegand sensors 33 are connected to the MCU module 231. The number of Wiegand sensors 33 is 3.

[0049] Specifically, the mounting box 21 has multiple interfaces (not shown in the figure), and the Wiegand sensor 33, the stator base 41 coil and the flow sensor 22 are all plugged into the corresponding interfaces.

[0050] In order to avoid magnetic field interference between rotor seat 42 and disk 31, which would affect the normal rotation correction of spindle 11 and the interference signal generated by Wiegand sensor 33, a partition (not shown) can be installed on spindle 11. The partition is located between rotor seat 42 and disk 31 and the material of the partition is permalloy.

[0051] like Figure 6 and Figure 7The implementation principle of this application embodiment is as follows: When a user turns on the water-using equipment, the water supply system generates water flow. The water flow first enters the NB water meter and acts on the impeller 17. Under normal circumstances, the water flow impacts the impeller 17, causing it to rotate. The impeller 17 drives the gear set 12 to rotate through the coaxially connected main shaft 11, which in turn drives the digit pointer set 13 and the digit counter 14 to mechanically display the water consumption in liters and cubic meters, respectively. At the same time, the gear set 12 also drives the encoder disk 15 to rotate. The rotational changes of the encoder disk 15 are sensed in real time by the NB transmitting device 16 and converted into digital signals, which are then uploaded to the remote system to realize data acquisition and monitoring.

[0052] By adopting a "5-digit wheel + 4-digit pointer" combination, the number of decimal places displayed in red on the digit wheel is reduced, lowering the probability of reading ambiguity and equipment misjudgment. Simultaneously, the addition of a pointer display ensures accurate indication even for minute flow rates, avoiding the risk of missed counts due to low flow rates failing to drive the digit wheel. This structural optimization significantly improves the recognition accuracy and first-pass yield of the NB base meter during initial inspection, enhancing the overall performance stability and lifespan of the meter.

[0053] During system operation, the flow sensor 22 monitors the water flow status in real time and transmits the detected flow signal to the MCU module 231. Simultaneously, the rotation monitoring component 3 senses the actual rotation status of the impeller 17 and sends a feedback signal of impeller 17 rotation to the MCU module 231. Figure 7 The pulse signal shown.

[0054] When the flow sensor 22 detects water flow but the rotating monitoring component 3 does not return a rotation signal for the impeller 17, the control module 23 will determine that the current state is "small water flow and the impeller 17 is not rotating" (for example, when the detected water flow rate is 0.001 L / min and the MCU module 231 does not receive a pulse signal). At this time, the control module 23 will start timing from the abnormal state and record the cumulative drainage volume. If the state continues for a certain period of time (e.g., 100 minutes), that is, the cumulative drainage volume reaches the measurement unit corresponding to the smallest scale of the pointer group 13 (e.g., 0.1L), the control module 23 will control the MOS switch 251 to close, the drive circuit will be turned on and the drive component 4 will be activated, providing short-term rotational power to the spindle 11, causing the corresponding smallest scale pointer in the pointer group 13 to jump one unit, realizing the physical measurement compensation of this small drainage volume (specifically, which one or more MOS switch transistors 251 are activated is determined by judging the position of the S and N stages in the rotor seat 42 at this time based on the previous pulse signal); If the impeller 17 resumes normal rotation before the abnormal state accumulates to the minimum range (e.g., less than 100 minutes), the MCU module 231 will record the currently accumulated leakage and continue monitoring. When the subsequent leakage accumulates to the minimum scale unit (e.g., 0.1L), the corresponding MOS switch will be triggered to close once (again, the position of the S and N poles in the rotor holder 42 is determined based on the pulse signal), driving the main shaft 11 to complete one compensation jump, and then immediately disconnecting the switch. Thus, "full measurement" is achieved through hardware and software collaboration, ensuring that water usage is accurately recorded and uploaded even under the smallest water flow conditions, balancing high accuracy, low power consumption, and high reliability.

[0055] like Figure 1 and Figure 9 This application also discloses an NB water meter, which is applied to the NB water meter counter in this application embodiment. It includes a housing 6, an upper mounting base 7 installed in the housing 6, a lower mounting base 8 bolted to the upper mounting base 7, a mounting plate 18 installed in the upper mounting base 7, that is, the gear set 12, the digit wheel set and the pointer set 13 are all installed in the upper mounting base 7, one end of the main shaft 11 is located in the upper mounting base 7 and the other end is located in the lower mounting base 8. The main shaft 11, the upper mounting base 7 and the lower mounting base 8 are coaxially arranged. The impeller 17 is located in the lower mounting base 8. The lower mounting base 8 has a plurality of water passage holes 81. The flow sensor 22 is embedded in the inner wall of the water outlet of the housing 6 and the flow sensor 22 is waterproofly encapsulated. The upper mounting base 7 has a mounting groove 71 at its bottom, and the mounting box 21 is located within the mounting groove 71. A mounting space 72 is reserved between the upper mounting base 7 and the main shaft 11, and the mounting space 72 communicates with the mounting groove 71. The upper mounting base 7 has several first wire-passing holes 73 communicating with the mounting space 72. The Wiegand sensor 33, disk 31, rotor seat 42, stator seat 41, and drive gear 51 are all located within the mounting space 72. The Wiegand sensor 33 is fitted against the inner wall of the upper mounting base 7. The upper mounting base 7 also has a stepped block within its mounting space 72, and the stator seat 41 is supported on the stepped block. The coils of the Wiegand sensor 33 and the stator seat 41 are electrically connected to the mounting box 21 through the first wire-passing holes 73. A second wire-passing hole 74 is provided on the outer wall of the upper mounting base 7, and the flow sensor 22 is electrically connected to the mounting box 21 through the second wire-passing hole 74. The shaft of the DC generator 53 passes through the mounting box 21 and through the bottom wall of the mounting slot 71. A sealing ring 75 is provided in the upper mounting base 7, which is fitted onto the main shaft 11 and located below the mounting space 72. A support ring 91 is threaded onto the housing 6, and a dial 92 is hinged to the support ring 91. The NB transmitter 16 is mounted on the support ring 91. By providing the mounting space 72 between the upper mounting base 7 and the main shaft 11, and integrating the rotation monitoring component 3 and the drive component 4 within the mounting space 72, a high degree of integration is achieved.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An NB water meter counter, comprising a main shaft (11), a gear set (12), a pointer set (13), a digit counter (14), an encoder disk (15), and an NB transmitting device (16), wherein the main shaft (11) is coaxially connected to an impeller (17), the main shaft (11) controls the operation of the gear set (12), the gear set (12) drives the pointer set (13) to operate to display the water consumption in liters, the gear set (12) controls the operation of the digit counter (14) to display the water consumption in cubic meters, the gear set (12) drives the encoder disk (15) to rotate, and the NB transmitting device (16) is used to receive the rotational changes of the encoder disk (15), generate a digital signal representing the water consumption, and upload it, characterized in that: It also includes a flow sensor (22), a control module (23), a power module (24), a control switch (25), a rotation monitoring component (3), and a drive component (4); The drive assembly (4) is used to provide auxiliary drive when the impeller (17) does not respond to the water flow. The drive assembly (4) is connected to the control switch (25). The control switch (25) is connected to the control module (23). The control module (23) is connected to the power module (24). The flow sensor (22) is used to detect changes in water flow. The rotation monitoring assembly (3) is used to detect whether the impeller (17) is rotating. The control module (23) is used to compare the changes in water flow detected by the flow sensor (22) with the detection results of the rotation monitoring assembly (3). When the flow sensor (22) detects water flow but the rotating monitoring component (3) does not provide feedback on the rotation signal of the impeller (17), the control module (23) will determine that the current state is a small water flow and the impeller (17) is not rotating. At this time, the control module (23) will start timing from this abnormal state and record the cumulative drainage volume. If the cumulative drainage volume reaches the measurement unit corresponding to the smallest scale of the pointer group (13), the control module (23) will control the control switch (25) to close, so that the drive component (4) provides short-term rotational power to the main shaft (11), causing the corresponding smallest scale pointer in the pointer group (13) to jump one unit, thereby realizing the physical measurement compensation of the small drainage volume. The drive assembly (4) includes a stator base (41) and a rotor base (42). The rotor base (42) is coaxially mounted on the main shaft (11) and sleeved inside the stator base (41). The control switch (25) includes multiple MOS switching transistors (251). The coils of the stator base (41) correspond one-to-one with the MOS switching transistors (251) and are connected. The control module (23) is an MCU module (231). All the MOS switching transistors (251) are connected to the MCU module (231). The rotation monitoring assembly (3) is used to detect the angular position of the rotor base (42) in real time and transmit the detection signal to the MCU module (231). The MCU module (231) controls the corresponding MOS switch (251) to turn on according to the current angular position of the rotor base (42), so that part of the stator coil is energized to generate a rotating magnetic field in the stator base (41), thereby driving the rotor base (42) to rotate continuously; The rotation monitoring component (3) includes a disk (31) and several Wiegand sensors (33). The disk (31) is coaxially connected to the spindle (11). Several Wiegand sensors (33) are arranged equidistantly along the circumference of the disk (31). The output of the Wiegand sensors (33) is connected to the MCU module (231).

2. The NB water meter counter according to claim 1, characterized in that: It also includes a power generation component (5), which is used to convert the kinetic energy of the rotation of the main shaft (11) into electrical energy and store it in the power module (24); The power module (24) provides operating power to the drive assembly (4), the flow sensor (22) and the control module (23).

3. The NB water meter counter according to claim 2, characterized in that: The power generation component (5) includes a drive gear (51) and a DC generator (53). The drive gear (51) is coaxially fixed on the main shaft (11). The DC generator (53) is connected to a driven gear (52). The drive gear (51) meshes with the driven gear (52). The output end of the DC generator (53) is connected to the power module (24) for generating electricity and supplying power to the power module (24) when the main shaft (11) rotates.

4. The NB water meter counter according to claim 3, characterized in that: The power module (24) is a supercapacitor (241); it also includes a mounting box (21), in which the MCU module (231), the MOS switch (251), the DC generator (53) and the supercapacitor (241) are all installed. The mounting box (21) is provided with an interface for connecting to the Wiegand sensor (33) and the stator base (41). The passive gear (52) is rotatably connected to the mounting box (21).

5. The NB water meter counter according to claim 1, characterized in that: The pointer group (13) includes 4 pointers, the digit counter (14) includes 5 digits, and the gear group (12) is also connected to a water flow indicator wheel (19).

6. An NB water meter, characterized in that: The NB water meter counter according to claim 4 includes a housing (6), an upper mounting base (7) installed inside the housing (6), a lower mounting base (8) connected to the upper mounting base (7), a gear set (12), a digit counter (14), and a pointer set (13) all installed inside the upper mounting base (7), a main shaft (11) with one end located inside the upper mounting base (7) and the other end located inside the lower mounting base (8), an impeller (17) located inside the lower mounting base (8), a plurality of water passage holes (81) opened in the lower mounting base (8), a flow sensor (22) installed at the outlet of the housing (6), a mounting groove (71) opened at the bottom of the upper mounting base (7), a mounting box (21) located in the mounting groove (71), and the upper mounting base (7) and the lower mounting base (8) connected to the upper mounting base (6) are all installed inside the upper mounting base (6). An installation space (72) is reserved between the main spindles (11). The upper mounting base (7) has several first wire holes (73) communicating with the installation space (72). The Wiegand sensor (33), the disk (31), the rotor seat (42), the stator seat (41), and the drive gear (51) are all located in the installation space (72). The coils of the Wiegand sensor (33) and the stator seat (41) are electrically connected to the mounting box (21) through the first wire holes (73). The shaft of the DC generator (53) passes through the mounting box (21) and through the bottom wall of the mounting groove (71). A sealing ring (75) is provided in the upper mounting base (7). The sealing ring (75) is sleeved on the main spindle (11) and located below the installation space (72).

7. The NB water meter according to claim 6, characterized in that: The flow sensor (22) uses wired transmission. The outer side wall of the upper mounting base (7) is provided with a second wire hole (74). The flow sensor (22) is electrically connected to the mounting box (21) through the second wire hole (74).

8. The NB water meter according to claim 6, characterized in that: A support ring (91) is threaded onto the housing (6), and a dial (92) is hinged onto the support ring (91). The NB transmitter (16) is mounted on the support ring (91).

Images