Prepayment intelligent water meter based on NB-IOT

Abstract

The utility model belongs to the technical field of intelligent water meters, and particularly relates to a prepayment intelligent water meter based on NB-IOT (Narrow Band Internet of Things). The Hall sensing circuit is connected with the Hall sensor and used for collecting the reading of the intelligent water meter; the touch key circuit is connected with the touch key and is used for reporting the state information of the intelligent water meter equipment; the battery is used for supplying power to the intelligent water meter; the NB spring antenna is used for communicating with an external information terminal; the vibration sensor is used for preventing a user from disassembling and changing the water meter; the buzzer is used for giving an alarm for reminding when the electric quantity of the battery is insufficient or the water fee balance is insufficient; the motor valve control switch is used for performing on-off operation according to the instruction; the infrared transmitting tube is matched with the infrared receiver and is used for realizing an infrared meter reading function; and the red LED indicating lamp is used for reminding the equipment to report the state or alarm the state. The intelligent prepayment water meter can solve the problems that an existing water meter is insufficient in prepayment and tedious in management, and has good market application prospects.

Description

Technical Field

[0001] The utility model belongs to the technical field of smart water meters, and specifically relates to a prepaid smart water meter based on NB-IOT. Background Art

[0002] NB-IOT stands for Narrow Band Internet of Things, which is a low-power wide-area network technology standard. NB-IOT is based on cellular technology and is used to connect various smart sensors and devices using wireless cellular networks. It focuses on the low-power and wide-coverage IoT market and is an emerging technology that can be widely used worldwide.

[0003] In recent years, with the continuous development of communication technology, the informationization and intelligence level of the water meter industry has been greatly improved. Smart water meter is a new type of water meter that uses modern microelectronics technology, modern sensor technology, and smart IC card technology to measure water consumption and transmit water consumption data and settle transactions. Compared with traditional water meters that generally only have the functions of flow collection and mechanical pointer display of water consumption, it is a great improvement.

[0004] At present, the old-style water meters are still widely used, but their shortcomings lead to heavy workload for meter readers and inaccurate meter reading data. Even though there are wireless transmission water meters in the prior art, they are still insufficient in prepayment, that is, when recharging, infrared remote control triggers reporting to open the valve for water use, so infrared remote control must be used to respond. Managers also have to carry remote controls, which makes water meter management cumbersome, so there is room for improvement.

[0005] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0006] The purpose of the utility model is to provide a prepaid smart water meter based on NB-IOT to solve the problems of shortcomings and cumbersome management of existing water meters in prepayment.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A prepaid smart water meter based on NB-IOT, comprising an NB-IOT control module and a Hall sensor circuit, a touch button circuit, a battery, an NB spring antenna, a vibration sensor, a buzzer, a motor valve control switch, an infrared transmitting tube, an infrared receiver and a red LED indicator light connected to the NB-IOT control module; wherein,

[0009] The Hall sensor circuit is connected to the Hall sensor and is used to collect readings of the smart water meter;

[0010] The touch button circuit is connected to the touch button and is used to report the status information of the smart water meter device;

[0011] The battery is used as a power source to supply power to the smart water meter;

[0012] The NB spring antenna is used to communicate with external information terminals;

[0013] The vibration sensor is used to prevent the user from disassembling and modifying the water meter;

[0014] The buzzer is used to give an alarm reminder when the battery power is low or the water fee balance is insufficient;

[0015] The motor valve-controlled switch is used to perform a switch operation according to the instruction of the NB-IOT control module;

[0016] The infrared transmitting tube cooperates with the infrared receiver to realize the infrared meter reading function;

[0017] The red LED indicator light is used to remind the device to report status or alarm status.

[0018] Preferably, the NB-IOT control module adopts a control chip of model CT-M203.

[0019] Preferably, the Hall sensing circuit includes a power supply voltage interface VDD, a signal A interface, a signal B interface, a GND interface and an H_DET interface; the power supply voltage interface VDD is connected to the SENSA pin of the NB-IOT control module through a resistor R10, and is connected to the SENSB pin of the NB-IOT control module through a resistor R9; the signal A interface is connected to the SENSA pin of the NB-IOT control module through a resistor R8; the signal B interface is connected to the SENSB pin of the NB-IOT control module through a resistor R7; the H_DET interface is disconnected from the UART1_RX pin of the NB-IOT control module, and the UART1_RX pin is disconnected from the power supply voltage interface VDD.

[0020] Preferably, the touch button circuit includes a power supply voltage interface VDD, a touch button terminal TP1 and a U2 single-channel touch chip CPT2610; the pin ST of the U2 single-channel touch chip CPT2610 is connected to one end of the power supply voltage interface VDD through a resistor R25; the pin ST of the U2 single-channel touch chip CPT2610 is connected to the TOUCH pin of the NB-IOT control module; the pin GND of the U2 single-channel touch chip CPT2610 is connected to the ground pin of the NB-IOT control module; the pin KEY of the U2 single-channel touch chip CPT2610 is connected to the touch button terminal TP1 through a resistor R58; the pin RSTN of the U2 single-channel touch chip CPT2610 is connected to one end of the power supply voltage interface VDD through a resistor R34; the pin VCC of the U2 single-channel touch chip CPT2610 is connected to one end of the power supply voltage interface VDD through a resistor R41; the pin CS of the U2 single-channel touch chip CPT2610 is connected to the ground pin of the NB-IOT control module through a resistor R35.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] (1) The utility model is a prepaid smart water meter based on NB-IOT, which is provided with an NB-IOT control module and a Hall sensor circuit connected thereto. The Hall sensor is used to collect the readings of the smart water meter dial, and the NB-IOT control module identifies and converts the data and uploads it to the platform system for intuitive display. The NB spring antenna is used to communicate with the external information terminal. The Hall sensor sampling readings used in the whole prepaid smart water meter are accurate, and the smart water meter has a daily standby working current of less than 10uA and low power consumption. It can not only avoid the metering error caused by unstable power supply or fault, but also the low power consumption of the smart water meter is conducive to increasing the battery life. By providing devices such as motor valve control switch, touch button, red LED indicator light, buzzer, etc., the functions of the prepaid smart water meter can be improved and convenient for users to use.

[0023] (2) The utility model of the prepaid smart water meter based on NB-IOT, the NB-IOT control module adopts the prepaid smart water meter dedicated control chip model CT-M203 and the corresponding Hall sensor circuit and touch button circuit, which can realize the accurate sampling of the water consumption data of the prepaid smart water meter, and can conveniently and quickly report the data of the prepaid smart water meter.

[0024] (3) The NB-IOT-based prepaid smart water meter of the utility model can realize the infrared meter reading function by setting an infrared receiver and an infrared transmitting tube; by setting a vibration sensor, it can prevent users from disassembling and modifying the prepaid smart water meter; by cooperating with a buzzer and a red LED indicator, it can allow users to more intuitively judge the status of the prepaid smart water meter; by setting a touch button, it can be more convenient for users to control the prepaid smart water meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the control principle of the utility model;

[0026] Figure 2 This is the principle diagram of the Hall sensor circuit of the utility model;

[0027] Figure 3 This is a schematic diagram of the touch key circuit of the utility model;

[0028] Description of main reference numerals:

[0029] 1. NB-IOT control module; 2. Hall sensor circuit; 3. Hall sensor; 4. Touch button circuit; 5. Touch button; 6. Battery; 7. NB spring antenna; 8. Vibration sensor; 9. Buzzer; 10. Motor valve control switch; 11. Infrared transmitting tube; 12. Infrared receiver; 13. Red LED indicator light. DETAILED DESCRIPTION

[0030] The following is a clear and complete description of the technical solution of the utility model patent. Obviously, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Refer to the attached Figure 1-3 , a prepaid smart water meter based on NB-IOT, including: NB-IOT control module 1, Hall sensor circuit 2, Hall sensor 3, touch button circuit 4, touch button 5, battery 6, NB spring antenna 7, vibration sensor 8, buzzer 9, motor valve control switch 10, infrared transmitter 11, infrared receiver 12 and red LED indicator 13; wherein, NB-IOT control module 1 adopts NB-IOT-based special prepaid smart water meter control chip model CT-M203; Hall sensor circuit 2 collects prepaid smart water meter dial reading through Hall sensor 3, transmits prepaid smart water meter data to NB-IOT control module 1, and then communicates with external information terminal through NB spring antenna 7. The entire prepaid smart water meter realizes intelligent acquisition of water meter data, intelligent data processing and transmission, and intelligent platform display.

[0034] In this embodiment, the battery 6 is used as a power source to supply power to the prepaid smart water meter; the motor valve-controlled switch 10 performs a switch operation according to the instruction of the NB-IOT control module 1; the touch button 5 is used to report the status information of the smart water meter device; the red LED indicator light 13 is set to remind the user of the operating status of the device. When the battery power is low or the water fee balance is insufficient, the buzzer 9 will sound an alarm.

[0035] The Hall sensor circuit 2 includes a power supply voltage interface VDD, a signal A interface, a signal B interface, a GND interface, a resistor R7, a resistor R8, a resistor R9 and a resistor R10. The power supply voltage interface VDD is connected to the SENSA pin of the NB-IOT control module through a 1M resistor R10, and is connected to the SENSB pin of the NB-IOT control module through a 1M resistor R9; the signal A interface is connected to the SENSA pin of the NB-IOT control module through a 10K resistor R8; the signal B interface is connected to the SENSB pin of the NB-IOT control module through a 10K resistor R7; the H_DET interface is disconnected from the UART1_RX pin of the NB-IOT control module, and the UART1_RX pin is disconnected from the power supply voltage interface VDD. The Hall sensor circuit 2 realizes accurate sampling of smart water meter data.

[0036] In this embodiment, the touch button circuit 4 includes a U2 single-channel touch chip CPT2610, a power supply voltage interface VDD, a pin GND, a TOUCH pin, a touch button terminal TP1, a resistor R25, a resistor R58, a resistor R34, a resistor R41 and a resistor R35. Among them, the pin ST of the U2 single-channel touch chip CPT2610 is connected to one end of the power supply voltage interface VDD through a 10K resistor R25; the pin ST of the U2 single-channel touch chip CPT2610 is connected to the TOUCH pin of the NB-IOT control module; the pin GND of the U2 single-channel touch chip CPT2610 is connected to the ground pin of the NB-IOT control module; the pin KEY of the U2 single-channel touch chip CPT2610 is connected to the touch button terminal TP1 through a 0R resistor R58; the pin RSTN of the U2 single-channel touch chip CPT2610 is connected to one end of the power supply voltage interface VDD through a 10K resistor R34; the pin VCC of the U2 single-channel touch chip CPT2610 is connected to one end of the power supply voltage interface VDD through a 0R resistor R41; the pin CS of the U2 single-channel touch chip CPT2610 is connected to the ground pin of the NB-IOT control module through a 20K resistor R35. The touch button circuit 4 realizes the real-time management of the prepaid smart water meter.

[0037] In this embodiment, the infrared meter reading function is realized by the infrared receiver 12 and the infrared transmitting tube 11, and the vibration sensor 8 is provided to prevent the user from disassembling and modifying the water meter. In addition, the buzzer 9 and the red LED indicator 13 allow the user to more intuitively judge the status of the prepaid smart water meter. The user can more conveniently control the prepaid smart water meter by touching the button 5.

[0038] When the NB-IOT-based prepaid smart water meter of the utility model is in use, the NB-IOT control module 1 is connected to the Hall sensor circuit 2, the smart water meter dial reading is collected through the Hall sensor 3, and the NB-IOT control module 1 identifies the converted data and uploads it to the platform system for intuitive display. At the same time, the NB spring antenna 7 is used to communicate with the external information terminal for connection and communication. The sampling reading of the Hall sensor 3 used in the entire prepaid smart water meter is accurate, and the daily standby operation of the smart water meter is less than 10uA, and the power consumption is low, which can not only avoid the measurement error caused by unstable power supply or failure, but also the low power consumption of the smart water meter is also conducive to increasing the battery life.

[0039] In addition, the NB-IOT-based prepaid smart water meter of the present invention improves the functions of the prepaid smart water meter and facilitates the use of users by providing devices such as a motor valve-controlled switch 10, a touch button 5, a red LED indicator light 13, and a buzzer 9.

[0040] In this embodiment, the connection between the NB-IOT control module 1 and the NB spring antenna 7, battery 6, motor valve-controlled switch 10, touch button 5, red LED indicator light 13, buzzer 9, infrared receiver 12, infrared transmitting tube 11, and vibration sensor 8 belongs to the prior art and can be implemented through conventional hardware design. The specific circuit structure will not be repeated in this embodiment.

[0041] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. The scope of the utility model is intended to be defined by the claims and their equivalents.

Claims

1. A prepaid smart water meter based on NB-IOT, characterized in that: It includes an NB-IOT control module and a Hall sensor circuit, a touch button circuit, a battery, an NB spring antenna, a vibration sensor, a buzzer, a motor valve control switch, an infrared transmitting tube, an infrared receiver and a red LED indicator light connected to the NB-IOT control module; wherein, The Hall sensing circuit is connected to the Hall sensor and is used to collect readings of the smart water meter; The touch button circuit is connected to the touch button and is used to report the status information of the smart water meter device; The battery is used as a power source to supply power to the smart water meter; The NB spring antenna is used to communicate with external information terminals; The vibration sensor is used to prevent the user from disassembling and modifying the water meter; The buzzer is used to give an alarm reminder when the battery power is low or the water fee balance is insufficient; The motor valve-controlled switch is used to perform a switch operation according to the instruction of the NB-IOT control module; The infrared transmitting tube cooperates with the infrared receiver to realize the infrared meter reading function; The red LED indicator light is used to remind the device to report status or alarm status.

2. The NB-IOT-based prepaid smart water meter according to claim 1, characterized in that: The NB-IOT control module uses a control chip model CT-M203.

3. The NB-IOT-based prepaid smart water meter according to claim 1, characterized in that: The Hall sensor circuit includes a power supply voltage interface VDD, a signal A interface, a signal B interface, a GND interface and a H_DET interface; The power supply voltage interface VDD is connected to the SENSA pin of the NB-IOT control module through a resistor R10, and is connected to the SENSB pin of the NB-IOT control module through a resistor R9; the signal A interface is connected to the SENSA pin of the NB-IOT control module through a resistor R8; the signal B interface is connected to the SENSB pin of the NB-IOT control module through a resistor R7; the H_DET interface is disconnected from the UART1_RX pin of the NB-IOT control module, and the UART1_RX pin is disconnected from the power supply voltage interface VDD.

4. The NB-IOT-based prepaid smart water meter according to claim 1, characterized in that: The touch button circuit includes a power supply voltage interface VDD, a touch button terminal TP1 and a U2 single-channel touch chip CPT2610; the pin ST of the U2 single-channel touch chip CPT2610 is connected to one end of the power supply voltage interface VDD through a resistor R25; the pin ST of the U2 single-channel touch chip CPT2610 is connected to the TOUCH pin of the NB-IOT control module; the pin GND of the U2 single-channel touch chip CPT2610 is connected to the ground pin of the NB-IOT control module; the pin KEY of the U2 single-channel touch chip CPT2610 is connected to the touch button terminal TP1 through a resistor R58; the pin RSTN of the U2 single-channel touch chip CPT2610 is connected to one end of the power supply voltage interface VDD through a resistor R34; the pin VCC of the U2 single-channel touch chip CPT2610 is connected to one end of the power supply voltage interface VDD through a resistor R41; the pin CS of the U2 single-channel touch chip CPT2610 is connected to the ground pin of the NB-IOT control module through a resistor R35.

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