Low-power-consumption device based on NB-IOT

Abstract

The utility model relates to the field of Internet of Things equipment, and provides a low power consumption device based on NB-IOT, which comprises a main control unit, a peripheral module, a power supply module, a signal acquisition module, a signal output module, an NB-IOT communication module, an upper computer interface module, an Internet of Things card seat and an Internet of Things cloud platform, the main control unit and the peripheral module complete the functions of data acquisition, data processing, data transmission, output interaction, storage and time service positioning; the power supply module provides a stable direct current power supply for the main control unit, the peripheral module, the signal acquisition module, the signal output module and the NB-IOT communication module; the NB-IOT communication module adopts a wireless transmission technology NB-IOT, and sends data to a base station or receives a control instruction from the base station based on a cellular network architecture; the signal acquisition module, the signal output module, the NB-IOT communication module and the upper computer interface module enter a low-power-consumption working state after data acquisition, data transmission and communication are finished, so that energy consumption can be saved; the system can work in an unattended field environment with limited power supply conditions for a long time in a low-power-consumption state.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of internet of things equipment especially, relates to a low power consumption device based on NB IOT. BACKGROUND

[0002] Many industrial and agricultural production data acquisition and transmission environments obviously need low power consumption and unattended, how to utilize new generation information technology to solve the problem of data acquisition and transmission under unattended condition and make the device work under low power consumption condition is very critical. Narrow broadband internet of things (NB-IOT) has the remarkable characteristics of mass access, low power consumption, low bandwidth, low rate, strong coverage ability and low cost, and is a new emerging internet of things technology, which is widely used in intelligent meter reading, intelligent parking and smart home field. A low power consumption device based on NB-IOT is developed by using a microcontroller with low power consumption, which can be applied to long-term unattended, unstable power supply but needs automatic data acquisition and transmission, and low power consumption use scene. SUMMARY

[0003] In the field environment where data collection and transmission of pressure, temperature, humidity and wind force are needed, unattended, limited power supply condition and high power consumption are encountered. The low power consumption device based on NB-IOT for data acquisition and transmission is provided in the utility model embodiment to solve the problem of use under the above limited conditions.

[0004] The utility model solves technical scheme that its technical problem adopts: a low power consumption device based on NB-IOT, the device includes main control unit and peripheral module, power module, signal acquisition module, signal output module, NB-IOT communication module, host computer interface module, internet of things card seat and internet of things cloud platform;

[0005] The main control unit and peripheral module include MCU and peripheral module, complete data acquisition, data processing, data transmission, output interaction, storage, time service positioning function;

[0006] The power module provides 3.3V and 5.0V voltage level stable DC power supply for the main control unit, signal acquisition module, signal output module, NB-IOT communication module, when the power module has electricity, power supply is carried out through lithium battery power supply unit, when the power module power failure works, switch on UPS power interface unit;

[0007] The signal acquisition module adopts two-wire system used in traditional industrial field to carry out signal transmission, can convert temperature, humidity, pressure, flow and other collected data into 4-20mA current signal for the MCU identification;

[0008] The signal output module adopts an A / D conversion circuit to convert the output quantity into a 4-20mA current signal for use by field instruments.

[0009] The NB-IOT communication module is the key of the whole device, adopts wireless transmission technology NB-IOT, based on cellular network architecture, with the characteristics of low cost, low power consumption and good security, through NB-IOT network to send data to the base station or receive control instructions from the base station;

[0010] The host computer interface module includes RS232 interface circuit and RS485 interface circuit, as the key hardware of the MCU and host computer communication, carries out level conversion, to achieve the purpose of real-time communication;

[0011] The main function of the Internet of Things card seat is to provide an interface between the device and the SIM card, so as to realize long-distance communication with the Internet of Things platform, including ordinary SIM card seat (large card), Micro SIM card seat and Nano SIM card seat;

[0012] The Internet of Things cloud platform realizes data analysis, data application, remote monitoring and unified management functions for different node devices, and sorts and analyzes the data returned by the device to generate a two-dimensional or three-dimensional data display interface, which is a service platform providing comprehensive business capabilities for users.

[0013] Further, the MCU in the main control unit and peripheral module is the core of the device, which completes data acquisition, data processing, data transmission and output interaction functions, adopts MSP430 series ultra-low power single-chip microcomputer, has RISC structure, fast read-write speed, low power consumption and rich functions;

[0014] The peripheral module in the main control unit and peripheral module includes a storage module, a clock circuit and a GPS module;

[0015] The storage module adopts a low-power and large-capacity SD card to store the data collected by the main control unit and the information generated during system operation, check historical data and maintain the system;

[0016] The clock circuit adopts a crystal oscillator and a capacitor to form an oscillation circuit to ensure time sequence consistency;

[0017] The GPS module supports Beidou and GPS system access, is used for obtaining UTC time and latitude and longitude data, and realizes positioning and time synchronization functions.

[0018] Further, the power module comprises a voltage stabilizing module, a lithium battery power supply unit and a UPS power interface unit, the voltage stabilizing module has the functions of voltage reduction, power switching and control, and ensures that the module works in a low-power state under different function module access conditions.

[0019] Further, the first pin of the signal acquisition module is connected with the first pin of the MCU, and is set to low level from high level after signal acquisition and data communication, and enters a low-power working state.

[0020] Further, the first pin of the signal output module is connected with the second pin of the MCU, and is set to low level from high level after signal output and communication, and enters a low-power working state.

[0021] Further, the first pin of the NB-IOT communication module is connected with the third pin of the MCU, and is set to low level from high level after communication, and enters a low-power working state.

[0022] The second pin of the NB-IOT communication module is connected with the fourth pin of the MCU, and when the NB-IOT communication module is powered off, an interrupt is triggered, so that the fourth pin of the MCU is closed to receive the interrupt, and the system completely enters a sleep working state, thereby saving energy and improving system stability.

[0023] The NB-IOT communication module has two low-power working modes of eDRX and PSM.

[0024] Further, the host computer interface module realizes communication through the RS232 interface circuit, the RS485 interface circuit and the host computer.

[0025] The first pin of the host computer interface module is connected with the fifth pin of the MCU, and is set to low level from high level after communication with the host computer, and enters a low-power working state.

[0026] Compared with the prior art, on the basis of meeting the basic function implementation of each module, the power module with the functions of power switching and control is designed, so that the remaining function modules immediately enter a low-power or sleep working state after signal acquisition, signal output and communication; the use of the MSP430 series ultra-low-power single-chip microcomputer as the MCU greatly reduces the power consumption of the device; at the same time, the NB-IOT communication module has two optional low-power working modes, and saves energy in addition to the functions of low cost and wide coverage; in addition, the device also has a remote management function, solves the practical difficulties of unattended, limited power supply conditions and high power consumption in the field environment with data acquisition and transmission requirements, and has diversified applications in industry and agriculture under the background of "double carbon". BRIEF DESCRIPTION OF DRAWINGS

[0027] The utility model is further explained below in combination with the drawings and embodiments.

[0028] Figure 1 A structure block diagram of a low-power device based on NB-IOT is provided for the embodiments of the utility model;

[0029] Figure 2 A structure block diagram of a main control unit and peripheral modules is provided for the embodiments of the utility model;

[0030] Figure 3 A structure block diagram of a power module is provided for the embodiments of the utility model;

[0031] Figure 4 A structure block diagram of an upper computer interface module is provided for the embodiments of the utility model. DETAILED DESCRIPTION

[0032] To make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the utility model is further explained in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and do not limit the utility model.

[0033] As shown in Figure 1 and Figure 2 In one embodiment, a low-power device based on NB-IOT is proposed, which comprises a main control unit and peripheral modules 100, a power module 200, a signal acquisition module 300, a signal output module 400, an NB-IOT communication module 500, an upper computer interface module 600, an Internet of Things card seat 700 and an Internet of Things cloud platform 800.

[0034] The main control unit and peripheral modules 100 comprise an MCU 110, a storage module 120, a clock circuit 130 and a GPS module 140, which complete data acquisition, data processing, data transmission, output interaction, storage and time positioning functions.

[0035] The power module 200 provides stable direct-current power of 3.3V and 5.0V voltage levels for the main control unit and peripheral modules 100, the signal acquisition module 300, the signal output module 400 and the NB-IOT communication module 500.

[0036] The signal acquisition module 300 uses a two-wire system for signal transmission, which is commonly used in traditional industrial fields, and can convert collected data such as temperature, humidity, pressure and flow into 4-20mA current signals for identification by the main control unit and peripheral modules 100.

[0037] The first pin of the signal acquisition module 300 is connected with the first pin of the MCU 110, and is set to low level by high level after signal acquisition and data communication, and enters a low-power working state;

[0038] The signal output module 400 adopts an A / D conversion circuit to convert the output into a 4-20mA current signal, for use by field instruments;

[0039] The first pin of the signal output module 400 is connected with the second pin of the MCU 110, and is set to low level by high level after signal output and communication, and enters a low-power working state;

[0040] The NB-IOT communication module 500 is the key of the whole device, adopts a wireless transmission technology NB-IOT, is based on a cellular network architecture, has the characteristics of low cost, low power consumption and good safety, and sends data to a base station or receives control instructions from the base station through the NB-IOT network;

[0041] The first pin of the NB-IOT communication module 500 is connected with the third pin of the MCU 110, and is set to low level by high level after communication, and enters a low-power working state;

[0042] The second pin of the NB-IOT communication module 500 is connected with the fourth pin of the MCU 110, and when the NB-IOT communication module 500 is turned off, an interrupt is triggered, so that the fourth pin of the MCU 110 is closed to receive the interrupt, and completely enters a sleep working state, which saves energy and improves system stability;

[0043] The host computer interface module 600 is the key hardware for communication between the host control unit and the peripheral module 100 and a host computer, performs level conversion, and achieves the purpose of real-time communication;

[0044] The Internet of Things card seat 700 mainly provides an interface between the device and a SIM card, so as to realize remote communication with the Internet of Things platform 800, including a general SIM card seat (large card), a Micro SIM card seat and a Nano SIM card seat;

[0045] The Internet of Things cloud platform 800 realizes the functions of data analysis, data application, remote monitoring and unified management of different node devices, and at the same time, sorts and analyzes the data returned by the device, generates a two-dimensional and three-dimensional data display interface, and is a service platform for providing comprehensive business capabilities for users.

[0046] As shown in Figure 2 In one embodiment, the host control unit and the peripheral module 100 include an MCU 110, a storage module 120, a clock circuit 130 and a GPS module 140.

[0047] The MCU 110 adopts an MSP430 series ultra-low power single-chip microcomputer;

[0048] The storage module 120 adopts a low-power and large-capacity SD card to locally store the data collected by the MCU 110 and the information generated in the system running process, check historical data, and perform system maintenance;

[0049] The clock circuit 130 adopts a crystal oscillator and a capacitor to form an oscillation circuit, ensuring time sequence consistency;

[0050] The GPS module 140 supports Beidou and GPS system access, is used to obtain UTC time and latitude and longitude data, and realizes positioning and time synchronization functions.

[0051] As shown in Figure 3 In one embodiment, the power module 200 includes a voltage stabilizing module 210, a lithium battery power supply unit 220, and a UPS power interface unit 230. The voltage stabilizing module 210 has a voltage reduction function and can also realize power switching and control functions, ensuring that it can work in a low-power state under different functional module access conditions.

[0052] As shown in Figure 4 In one embodiment, the host computer interface module 600 realizes communication with a host computer through the RS232 interface circuit 610 and the RS485 interface circuit 620.

[0053] The first pin of the host computer interface module 600 is connected to the fifth pin of the MCU 110, and after communication with the host computer ends, it is set to low from high, entering a low-power working state.

Claims

1. A low-power device based on NB-IOT, characterized in that, The device comprises a master control unit and peripheral module, a power module, a signal acquisition module, a signal output module, an NB-IOT communication module, an upper computer interface module, an Internet of Things card seat, and an Internet of Things cloud platform. The master control unit and peripheral module comprise an MCU, a storage module, a clock circuit, and a GPS module, and complete data acquisition, data processing, data transmission, output interaction, storage, and time positioning functions. The power module provides stable direct current power of 3.3V and 5.0V voltage levels for the master control unit and peripheral module, the signal acquisition module, the signal output module, and the NB-IOT communication module. When the power module is working, power supply is provided by a lithium battery power supply unit. When the power module is working in a power failure mode, a UPS power interface unit is switched on. The signal acquisition module uses a two-wire system commonly used in industrial fields for signal transmission, and can convert temperature, humidity, pressure, and flow acquisition data into 4-20mA current signals for the MCU to recognize. The signal output module uses an A / D conversion circuit to convert the output into 4-20mA current signals for use in field instruments. The NB-IOT communication module is the key of the entire device, uses wireless transmission technology NB-IOT, is based on a cellular network architecture, and transmits data to a base station or receives control instructions from the base station through an NB-IOT network. The upper computer interface module comprises an RS232 interface circuit and an RS485 interface circuit, which are key hardware for communication between the MCU and the upper computer, and perform level conversion to achieve real-time communication. The Internet of Things card seat mainly provides an interface between the device and a SIM card to realize long-distance communication with an Internet of Things platform, and comprises a normal SIM card seat, a Micro SIM card seat, and a Nano SIM card seat. The Internet of Things cloud platform realizes data analysis, data application, remote monitoring, and unified management of different node devices, sorts and analyzes data transmitted by the device, generates a two-dimensional and three-dimensional data display interface, and is a service platform that provides comprehensive business capabilities for users.

2. The apparatus of claim 1, wherein The MCU in the master control unit and peripheral module is the core of the device, and uses an MSP430 series ultra-low power single-chip microcomputer.

3. The apparatus of claim 1, wherein The storage module in the master control unit and peripheral module uses a low-power, large-capacity SD card to locally store data collected by the MCU and information generated during system operation, check historical data, and maintain the system.

4. The apparatus of claim 1, wherein The GPS module supports Beidou and GPS system access, is used to obtain UTC time and latitude and longitude data, and realizes positioning and time synchronization functions.

5. The apparatus of claim 1, wherein The power module comprises a voltage stabilizing module, a lithium battery power supply unit, and a UPS power interface unit. The voltage stabilizing module has a voltage reduction function, and can also realize power switching and control functions to ensure that different functional modules can work in a low-power state under different access conditions.

6. The apparatus of claim 5, wherein The first pin of the signal acquisition module is connected with the first pin of the MCU, and is set to low level by high level after signal acquisition and data communication, the voltage stabilizing module realizes power switching and control, and makes the signal acquisition module enter a low-power working state; The first pin of the signal output module is connected with the second pin of the MCU, and is set to low level by high level after signal output and communication, the voltage stabilizing module realizes power switching and control, and makes the signal output module enter a low-power working state; The first pin of the NB-IOT communication module is connected with the third pin of the MCU, and is set to low level by high level after communication, the voltage stabilizing module realizes power switching and control, and makes the NB-IOT communication module enter a low-power working state; The second pin of the NB-IOT communication module is connected with the fourth pin of the MCU, and triggers an interruption when the NB-IOT communication module is powered off, so that the fourth pin of the MCU closes the interruption, the voltage stabilizing module realizes power switching and control, and makes the NB-IOT communication module enter a complete sleep working state, which saves energy and improves system stability; The NB-IOT communication module has two low-power working modes of eDRX and PSM.

7. The apparatus of claim 1, wherein The host computer interface module realizes communication with a host computer through the RS232 interface circuit and the RS485 interface circuit, the first pin of the host computer interface module is connected with the fifth pin of the MCU, and is set to low level by high level after communication with the host computer, and enters a low-power working state.

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