CN219497127U - STS prepayment thing networking water gauge based on bluetooth communication - Google Patents

Abstract

The utility model discloses an STS prepayment internet of things water meter based on Bluetooth communication, wherein a magnetic resistance module upper shell, a plastic shell upper shell, a battery compartment cover and a liquid crystal display are arranged on a water meter body, an electronic control part comprises a microprocessor module and other modules, and the electronic control part comprises a Bluetooth communication module, an NB-IoT communication module, a metering acquisition module, a power supply control module, a storage module, an STS decoder module, an LCD liquid crystal display, a valve driving circuit and the like. The water meter adopts a Bluetooth communication mode to carry out information interaction with user equipment, a user realizes inquiry and writing operation of corresponding information on a meter end through a Bluetooth water meter APP, and the corresponding inquired information is displayed on the meter end through LCD; the user can pay through the Bluetooth APP, and payment can be achieved through an Internet of things system based on NB-IoT communication. The payment data realizes the payment operation of the meter under the safety control of the STS key encryption technology, thereby realizing the safety and reliability of the data.

Description

STS prepayment thing networking water gauge based on bluetooth communication

Technical Field

The utility model relates to a wireless Bluetooth communication technology, an STS encryption decoding technology and an NB-IoT data transmission water meter, in particular to an STS prepaid Internet of things water meter based on Bluetooth communication.

Background

In recent years, along with the rapid development of the technology of the Internet of things on the basis of the great heat and the rural transformation of the water meter market, the number of resident users of the water meter of the Internet of things is increased year by year. The intelligent water meter on the market has a plurality of problems when solving the pain point of the water meter user, for example, in the aspect of communication mode, the emerging communication technologies such as NB-IoT, lora, 4G and the like have the unique advantages of wide coverage, low power consumption, large connection and low cost, but the intelligent water meter depends on the network platform establishment of operators, and the aim of directly carrying out information interaction between people and the prepaid water meter can not be achieved under the condition of no network. Besides the time reported by the water meter period, the meter in the user's home is in a sleep mode and needs to be manually triggered to wake up, so that the maintenance of products by later-stage manufacturers and water service companies is inconvenient. In the aspect of prepayment mode, for example, the storage file format and encryption mode of the IC card prepayment water meter are different due to different manufacturers, and most of water meter installation underground environment causes the prepayment system of water service company to be compatible and poor in expansibility, so that a plurality of systems with different protocols and different modes exist, and the maintenance cost is increased. The STS prepaid internet of things water meter based on Bluetooth communication can be convenient for users to obtain information of the meter more directly, recharging and valve opening and closing can be carried out through the mobile phone APP, information interaction can be carried out directly with the water meter, safety and reliability are improved greatly, cost is saved, and the water meter is more economical; the operation is also relatively simple and quick. The mobile phone water meter APP used in the method is uniformly developed and specially managed by water service companies.

Disclosure of Invention

In order to solve the above problems, the present application provides a bluetooth communication based STS prepaid internet of things water meter, and in order to better meet the requirements of users for convenience in use, high security, high reliability and low cost of water service companies, it is necessary to invent a bluetooth communication based STS prepaid internet of things water meter that is convenient for users to operate in real time and recharge safely.

The utility model is realized by the following technical scheme:

the utility model provides a STS prepayment thing networking water gauge based on bluetooth communication, includes water gauge base table and controller mainboard, be provided with reluctance module epitheca, plastic case epitheca, battery compartment shroud, liquid crystal display on the water gauge body, be provided with pulse interface, liquid crystal display module, memory module, NB-IoT module, MCU microprocessor, motor drive module, power supply interface, bluetooth communication interface, touch button, SIM card on the controller mainboard, controller mainboard and pulse interface, liquid crystal display module, memory module, NB-IoT module, MCU microprocessor, motor drive module, power supply interface, bluetooth communication interface, touch button, SIM card communication connection, be provided with MCU processing unit in the MCU microprocessor, MCU processing unit realizes data interaction with the power module that sets up, display module, valve control module, NB-IoT communication module, man-machine interaction unit, storage unit, measurement unit, bluetooth communication module, STS control unit communication connection.

Further, according to the STS prepayment internet of things water meter based on Bluetooth communication, the MCU microprocessor drives the motor valve to operate the switch valve through the motor driving module driving circuit, so that a user can conveniently protect water consumption of the water meter.

Further, a Bluetooth communication-based STS prepaid Internet of things water meter is provided, and a clock setting module is arranged on the MCU processing unit and used for providing real-time data for the MCU.

Further, the STS prepaid internet of things water meter based on Bluetooth communication can be connected with a user mobile phone APP, and is used for updating time in the meter and inquiring consumption information in the meter.

Further, according to the STS prepaid internet of things water meter based on Bluetooth communication, the NB-IoT communication module can automatically correct time of the water meter and report the consumption information in the report.

Further, the STS prepaid internet of things water meter based on Bluetooth communication has the functions of recharging, inquiring and the like of the water meter through Bluetooth, mobile phone APP and Token data.

Further, the STS control unit is used for decrypting the 66-bit Token to finish the recharging operation of the user.

The power module provides power for the whole system and supplies power for the Bluetooth communication module, the NB-IoT communication module, the memory module, the flow acquisition module, the STS decoder module, the LCD display module, the clock module and the like, so that the electronic control can normally complete work; the metering and collecting module is used for further converting the accumulated water consumption of the mechanical metering of the water meter in an electric pulse signal mode, converting the electric pulse signal into a digital signal through the AD sampling circuit and transmitting the digital signal to the MCU for further calculation, and further calculating to obtain the actual water consumption, wherein the accuracy of the actual water consumption can be 1L, 10L and 100L; the STS decoder module is used for decrypting the 66-bit Token to finish the recharging operation of the user, each piece of Token data has time validity, the table can automatically judge the time TID of the Token, and the correctness, the reliability and the safety of the Token are ensured; technically, attack on the system is reduced, the STS key is generated by carrying out key dispersion, encryption conversion and the like according to the table number, the region code and the like, and the STS key is uniformly managed by a water purchasing system of a water service company, so that the security is improved, and the method is a one-way token medium transmission mode.

The LCD liquid crystal prompt module displays necessary information, parameter information and the like of the water meter of the user on a screen, so that the user can conveniently check related information, such as the displayed residual water meter consumption, accumulated consumption, network information, IP information, time information and the like; the valve driving module is controlled by the MCU, and drives the motor valve to switch the valve through the electric control valve driving circuit, so that a user can conveniently protect the water consumption of the water meter; the clock module is used for providing real-time data for the MCU, ensuring that the water meter has correct time, and thus ensuring the accuracy of time and the accuracy and reliability of the consumption information settlement; the user can update the time in the table and the consumption information in the lookup table by using the mobile phone APP through Bluetooth, and can automatically correct time and report the consumption information in the table through the NB-IoT module.

In summary, the following beneficial effects of the utility model are:

1. the utility model relates to an STS prepaid internet of things water meter based on Bluetooth communication, which has the beneficial effects that: by adopting the Bluetooth communication technology, a user can inquire the surface end information in real time through the mobile phone APP, so that the user can know and master the water consumption information, the running information and the like of the water meter in real time; the Bluetooth communication technology has the advantages that the Bluetooth at the meter end is in a real-time to-be-connected state due to the low power consumption, a user can operate through a mobile phone at any time, for example, when the valve at the meter end is closed when the user goes out for a short time, the valve closing operation can be issued through the mobile phone APP at any time, and when water is needed, the valve is opened only through the APP, so that water leakage is effectively prevented. Compared with other wireless communication technologies, the method is more convenient and simple, and the user can use the method simply and quickly.

2. The utility model provides an STS prepaid Internet of things water meter based on Bluetooth communication, which is convenient and quick for users to control the water meter at any time through Bluetooth communication by using a mobile phone APP. The water company can save a lot of unnecessary complicated procedures, improves the efficiency, saves considerable manpower and material resources, and reduces the economic cost.

Drawings

The accompanying drawings, which are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this application, illustrate embodiments of the utility model. In the drawings:

FIG. 1 is a schematic diagram of an MCU master control module of the present utility model;

FIG. 2 is a diagram illustrating the flow of token passing and STS decoder decryption data;

FIG. 3 is a diagram of ISO transaction benchmark numbers;

fig. 4 is a STS decoder key change state diagram;

FIG. 5 is a schematic diagram of a molded case structure of a water meter according to the present utility model;

FIG. 6 is a rear view of a control motherboard of the water meter of the present utility model;

in the drawings, the reference numerals and corresponding part names:

the intelligent control system comprises a 1-reluctance module upper shell, a 2-plastic shell upper shell, a 3-battery compartment cover, a 4-liquid crystal display screen, a 5-pulse interface, a 6-liquid crystal display module, a 7-memory module, an 8-NB-IoT module, a 9-MCU microprocessor, a 10-motor driving module, an 11-power interface, a 12-Bluetooth communication interface, a 13-touch key, a 14-SIM card, a 100-MCU processing unit, a 101-power module, a 102-display module, a 103-valve control module, a 104-NB-IoT communication module, a 105-man-machine interaction unit, a 106-storage unit, a 107-metering unit, a 108-Bluetooth communication module and a 109-STS control unit.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples

Examples

The utility model provides a STS prepayment thing networking water gauge based on bluetooth communication, includes water gauge base table and controller mainboard, be provided with reluctance module epitheca 1, plastic case epitheca 2, battery compartment shroud 3, liquid crystal display 4 on the water gauge body, be provided with pulse interface 5, liquid crystal display module 6, memory module 7, NB-IoT module 8, MCU microprocessor 9, motor drive module 10, power interface 11, bluetooth communication interface 12, touch button 13, SIM card 14 on the controller mainboard, controller mainboard and pulse interface 5, liquid crystal display module 6, memory module 7, NB-IoT module 8, MCU microprocessor 9, motor drive module 10, power interface 11, bluetooth communication interface 12, touch button 13, SIM card 14 communication connection, be provided with MCU processing unit 100 in the MCU microprocessor 9, MCU processing unit 100 realizes data interaction with the power module 101 that sets up, power module 102, valve control module 103, NB-IoT communication module 104, human-computer interaction unit 105, storage unit 106, metering unit 107, bluetooth communication module 108, STS control unit 109 communication connection.

As shown in fig. 1, the STS prepaid internet of things water meter based on bluetooth communication comprises a water meter base table and an intelligent controller, wherein a controller main board comprises an MCU processing unit 100, a power module 101, a display module 102, a valve control module 103, an NB-IOT communication module 104, a man-machine interaction unit 105, a storage unit 106, a metering unit 107, and a bluetooth communication module 108 connected with an STS control unit 109 to realize data interaction.

The STS decoder module decrypts the data flow description as shown in fig. 2. The user transmits the water purchase Token to the STS control unit 109 through the water purchase APP software by using the Bluetooth communication module 108 of the mobile phone Bluetooth and the water meter, the STS decoder module is contained in the STS control unit 109 and is used for decrypting the 66-bit Token, and the decryption of the Token is completed mainly through the operations of type bit transposition, data substitution, data transposition, key cyclic shift and the like, so that the user recharging operation is realized, each Token data has time effectiveness, the table can automatically judge the time TID of the Token, the correctness, the reliability and the safety of the Token are ensured, and each table has independent encryption and decryption keys, so that the attack on the system is technically reduced. The STS key is generated by carrying out key dispersion, encryption conversion and the like according to a table number, a manufacturer code, a supply group code, an issuing identification code and the like, is uniformly managed by a water purchasing system of a water service company, improves the safety, is a one-way token medium transmission mode, the water meter can record 50 token records of the latest communication operation, if the number of abnormal tokens exceeds 10 times in one day, the table can be charged and locked, the STS decoder function is closed, and the security of the water meter cost control function is ensured by recording token attack event records.

The data elements and their relationships, which are composed of ISO transaction reference numbers, are shown in fig. 3, with their data structures integrated in STS control unit 109. A prepaid water meter based on STS is composed of IIN and IAIN/DRN, and is characterized by that in the prepaid water meter compatible with STS, unique DRN must be allocated for executing application layer protocol, and the DRN is composed of manufacturer code, DSN and DRN check word, wherein the manufacturer code is 2-bit unique code for distinguishing manufacturer, DSN is 8-bit unique code allocated by manufacturer, and DRN check word is used for checking integrity of DRN. IIN is a unique field defined by a 6-digit number within which subsequent IAIN values (e.g., DRNs) can be published. And an IIN value of 600727 has become a de facto standard adopted by STS-compatible prepaid systems worldwide.

As shown in fig. 4, which is a STS decoder key modification state diagram, STS decryption decoder keys are integrated in STS control unit 109, where DITK is a decoder initialization transfer key, and DITK values are used to initialize decoder key registers at the production and repair stage under manufacturer premises. The ownership of the key belongs to the manufacturer, so it is generated and managed by the water meter manufacturer and is not known to the water service company. DITK is the only key that can enter plaintext into the meter. Other passwords (DDTK, DUTK, DCTK) must be entered into the meter only with ciphertext (encryption). One DITK key can only be used for the following key management functions: used as a parent key for another DITK; used as a parent key for DDTK; used as the parent key for the DUTK.

Referring to fig. 4, which is a state diagram of STS decoder key modification, STS decryption decoder keys are integrated in STS control unit 109, wherein DDTK is a decoder default delivery key used to support that a water meter is assigned to a default provisioning group, and its authority can only be controlled for management and cannot be used for credit recharge operation. In the water meter manufacturing and maintenance stage, when the water meter is not allocated to the public group or the unique group, the corresponding DCTK or DUTK cannot be allocated, but a unique default group is allocated for each manufacturer, and after each manufacturer receives the unique water selling key VDDK, the DDTK of all the water meters is generated by the unique water selling key and the water meters are loaded in the manufacturing stage. Later when the meter is installed and running, it is already assigned to the designated provisioning group, and it is necessary to reassign a DUTK/DCTK key value encrypted with the parent key DDTK, and load it into the meter. Ownership of the DDTK belongs to each meter manufacturer and is managed by a Key Management System (KMS). DDTK is an encrypted value that cannot be accepted as clear text by the meter; if encrypted with the parent key in the current decoder key register, a prepaid table can only be loaded with one DDTK. One DDTK key can only be used for the following key management functions: used as a parent key for another DDTK; used as the parent key for the DUTK.

Referring to fig. 4, which is a state diagram of STS decoder key modification, STS decryption decoder keys are integrated in STS control unit 109, where DUTK is a decoder unique transfer key used to support water meters assigned to unique provisioning groups, and DUTK can perform both management control and credit recharge operations. If the meter has been assigned to a unique group during the manufacturing and repair phase, a corresponding DUTK key value encrypted with the parent key DITK needs to be assigned. After the water meter is installed and operated, a DUTK key value encrypted by a father key DUTK is reassigned and loaded into the water meter. DUTK is an encrypted value that cannot be accepted as clear text by the meter; it can only be loaded into the meter after it has been encrypted by the same value of the parent key stored in the current key register of the meter. The DUTK is owned by the water company and managed by the key management system. The meter key register must contain a DUTK key value provided by the KMC before the meter can be purchased from the manufacturer. One DUTK key can only be used for the following key management functions: used as a parent key for another DUTK; used as the parent key for DDTK.

Fig. 5 is a schematic diagram of a plastic shell structure of an STS prepaid internet of things water meter based on bluetooth communication according to an embodiment of the present utility model, wherein a liquid crystal display 4 is included in a display module 102, and 1 is included in a metering unit 107;

fig. 6 is a back view of a control motherboard of an STS prepaid internet of things water meter based on bluetooth communication. The pulse interface 5 is connected to a metering unit 107 on the motherboard, and the bluetooth communication interface 12 is included in a bluetooth communication module 108.

In practical applications, the MCU processing unit 100, the storage unit 106, the display module 102, the metering module 107, the valve control module 103, the power module 101, the Bluetooth communication module 108 and the NB-IOT communication module 104 are all integrated on a controller motherboard;

the metering unit 107 adopts a magnetic resistance sampling device to meter, the acquisition module specifically comprises a magnetic resistance acquisition device and a water meter base meter rotary sampling turntable, the magnetic resistance acquisition device is arranged above the water meter rotary turntable, the magnetic resistance module transmits acquired pulse signals to the MCU processing unit 100 through the sampling pulse interface 5, and the MCU processing unit 100 analyzes the pulse signals, so that water statistics is realized, and the cost control function of the water meter is realized.

The clock module is integrated in the MCU processing unit 100, and the hardware clock module of the MCU processing unit 100 can provide accurate date, time and timing functions, and also ensures the step price switching of the meter, and the settlement of the usage information is accurate. The date and time can be displayed by the display module 102;

in practical application, the 3.6V lithium-ion battery of the water meter is installed in the battery compartment cover 3, and the battery connector is connected to the power interface 11, wherein the power interface 11 is included in the power module 101, and the battery detection module connected to the power module 101 is used for preventing relevant data from being lost or other situations from occurring when the water meter stops running due to too low electric quantity of the power module 101. The power supply detection module adopts a low-voltage detection algorithm to detect the static voltage of the lithium battery and the SPC power supply circuit output port, sets a low-voltage threshold, and reports and alarms, valve control, display control, key operation limitation, communication limitation and other operations on the low-voltage state. Specifically, the processing logic of the table to detect a battery voltage below 3.4V under normal operating conditions is: the meter is started to detect the voltage of the battery once every 180s of open AD, and if the detected voltage is lower than 3.4V and higher than 3.2V for 240 times continuously, the meter considers that the low-voltage primary alarm of the battery is abnormal. When the meter detects the first-level alarming condition of the battery voltage, the meter can report low-electricity alarming time to remind a user of insufficient battery voltage, and the meter can close the periodic reporting function, but the triggering reporting and event alarming reporting functions are normal, and the metering is normal. The meter can continue to detect the voltage of the battery once according to the detection of the AD every 10 minutes under the primary alarm state, if the voltage of the battery is lower than 3.2V for 3 continuous times, the meter can set a secondary alarm of the voltage of the battery, the secondary alarm state meter can immediately store metering data, metering is stopped, all reporting functions are closed, and a user waits for replacing the battery.

The bluetooth communication module 108 sets a bluetooth broadcasting interval of 3s for one time in the use process, is convenient for the user to recharge the functions of paying fee and after-sales maintenance, and defaults the bluetooth broadcasting time to 8 to 20 points per day, and the bluetooth broadcasting is turned off in the rest of time. Because the bluetooth inactive broadcasting mechanism is designed after defaulting and leaving factory for 5 days in order to prevent mutual interference between bluetooth modules in the production process of the water meter, but bluetooth broadcasting can be opened by manual triggering, and the broadcasting time defaults to 5 minutes. The watch automatically opens the broadcast function after 5 days from factory. The Bluetooth whole of the meter meets the requirement of water meter power consumption, the static default power consumption is 22ua, and the service life requirement of at least 6 years required by water service companies is met.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The utility model provides a STS prepayment thing networking water gauge based on bluetooth communication, includes water gauge base table and controller mainboard, its characterized in that is provided with reluctance module epitheca, plastic case epitheca, battery compartment shroud, liquid crystal display on the water gauge body, be provided with pulse interface, liquid crystal display module, memory module, NB-IoT module, MCU microprocessor, motor drive module, power source, bluetooth communication interface, touch button, SIM card on the controller mainboard, the controller mainboard is connected with pulse interface, liquid crystal display module, memory module, NB-IoT module, MCU microprocessor, motor drive module, power source, bluetooth communication interface, touch button, SIM card communication, be provided with MCU processing unit in the MCU microprocessor, MCU processing unit realizes data interaction with the power module, display module, valve control module, NB-IoT communication module, man-machine interaction unit, storage unit, measurement unit, bluetooth communication module, STS control unit communication connection that set up.

2. The STS prepaid internet of things water meter based on Bluetooth communication according to claim 1, wherein the MCU microprocessor drives the motor valve to switch the valve through the motor driving module driving circuit, so that a user can conveniently protect the water consumption of the water meter.

3. The STS prepaid internet of things water meter based on bluetooth communication according to claim 1, wherein the MCU processing unit is provided with a clock setting module for providing real-time data for the MCU.

4. The STS prepaid internet of things meter based on bluetooth communication according to claim 1, wherein the bluetooth communication interface is connectable to a user's mobile APP for updating time in the meter and amount information in the lookup table.

5. The bluetooth communication based STS prepaid internet of things meter of claim 1, wherein the NB-IoT communication module is configured to automatically time the meter and report the usage information in the report.

6. The STS prepaid internet of things water meter based on Bluetooth communication according to claim 2, wherein the water meter completes the functions of recharging and inquiring the water meter through the Bluetooth, the mobile phone APP and the Token data.

7. The bluetooth communication based STS prepaid internet of things water meter of claim 1, wherein the STS control unit is configured to decrypt a 66-bit Token to complete a user recharging operation.