CN208477340U - A kind of Internet of Things temperature acquisition terminal based on NB-IoT technology - Google Patents
A kind of Internet of Things temperature acquisition terminal based on NB-IoT technology Download PDFInfo
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Abstract
A kind of Internet of Things temperature acquisition terminal based on NB-IoT technology, is related to Internet of Things acquisition terminal field, including sequentially connected temperature sensor module, A/D analog-to-digital conversion module, MCU single chip processing module and communication module；Temperature sensor module is used for temperature collection analog signal；A/D analog-to-digital conversion module, for temperature analog signal to be converted into digital signal and digital signal is sent to MCU single chip processing module；MCU single chip processing module, for digital signal to be analyzed and processed, and by treated, signal is sent to communication module；Communication module, by the analysis of MCU single chip processing module, treated that data are transmitted at a distance；The temperature parameter in production and life can efficiently and accurately be monitored, and meet the needs of people are for multi-connection user, and it is low in cost, low in energy consumption, acquisition data coverage is wide, there is wireless and wired remote transfer function.
Description
Technical field
The utility model relates to Internet of Things acquisition terminal fields, and in particular to a kind of Internet of Things temperature based on NB-IoT technology
Spend acquisition terminal.
Background technique
Internet of Things is the important component of generation information technology and the important development stage of information age, object
Networking is exactly to extend its user terminal and expand between any article and article, communicates and exchanges, to realize intelligence
A kind of network of energyization.As internet of things product form is increasing, one side Module Price still will continue to drop；Another party
Face, Internet of Things module can also develop towards diversified direction, to meet the functional requirement of more and more different type equipment.?
Between the coming years, for the wireless communication module of Internet of Things, it can develop towards more integrated, miniaturization direction, increasingly
More chips and function can be integrated into Internet of Things module.
Temperature is physical parameter universal and important in production process and scientific experiment, in the industrial production, in order to efficient
Production, it is necessary to control effectively to the major parameter in production process, such as temperature, pressure, flow, speed, wherein temperature
Control occupies sizable ratio in process of production, accurately measure and efficiently control temperature be high-quality, high yield, low consumption and
The essential condition of safety in production.However, the existing temperature acquisition terminal based on Internet of Things, with high costs, power consumption is higher, data
It transmits unstable, temperature parameter cannot be monitored effectively in real time, and it is less to connect user.
Summary of the invention
Utility model aims to solve the above problem in the prior art, provide a kind of based on NB-IoT technology
Internet of Things temperature acquisition terminal can efficiently and accurately monitor the temperature parameter in production and life, and meet people for connecting more
Connect the demand of user, and it is low in cost, low in energy consumption, acquisition data coverage is wide, there is wireless and wired remote transmission
Function.
To reach above-mentioned purpose, the utility model adopts the following technical solution:
A kind of Internet of Things temperature acquisition terminal based on NB-IoT technology, including sequentially connected temperature sensor module,
A/D analog-to-digital conversion module, MCU single chip processing module, communication module；
The temperature sensor module is used for temperature collection analog signal；
The A/D analog-to-digital conversion module, the temperature analog signal for acquiring the temperature sensor module are converted into
Digital signal is simultaneously sent to the MCU single chip processing module by digital signal；
The MCU single chip processing module, for will be carried out by the digital signal after A/D analog-to-digital conversion module conversion
Analysis processing, and signal is sent to the communication module by treated；
The communication module, treated for receiving MCU single chip processing module signal, and by MCU single-chip microcontroller
Treated that data are transmitted at a distance for processing module analysis；The communication module includes NB-IoT communication module.
The temperature sensor module supports multiple sensor to be acquired simultaneously to temperature.
Pt100 platinum resistance temperature sensor can be used in the temperature sensor module.Pt100 platinum resistance temperature sensor
Resistance value variation with temperature and change, at certain linear functional relation, by measuring the size of platinum resistance resistance value, according to
Corresponding temperature value can be obtained in Pt100 platinum resistance phasing meter, and measurement is accurate and reliable.
The utility model further includes analog switch switching module, the input terminal of the analog switch switching module and the temperature
The connection of sensor die block signal is spent, the output end of analog switch switching module is connect with the A/D analog-to-digital conversion module signal, institute
State temperature analog signal of the analog switch switching module for selecting one or more temperature sensor module to acquire and will be selected
Temperature analog signal be transferred to A/D analog-to-digital conversion module.
74HC4052D logical series chip can be used in the analog switch switching module, all the way by addressing system selection
Or the temperature analog signal of multi way temperature sensor module acquisition is handled.The utility model is patrolled using 74HC4052D series
Volume chip selects switch S0, S1 by chip address, can simultaneous selection one or more mould under the cooperation of three logic chips
Quasi- signal send to MCU single chip processing module and is handled.
Communication module described in the utility model further includes isolation RS 485 communication module, and the isolation RS 485 communication module is adopted
With high speed photo coupling, the isolation RS 485 communication module is connect with the MCU single chip processing module signal, the isolation RS 485
Communication module is used to MCU single chip processing module analysis treated data carrying out wired remote transmission.
The utility model uses isolation RS 485 communication mode simultaneously, meets user's wired communication functions demand, by using
High speed photo coupling reaches the electrical isolation of bus and control circuit, there is communication in serious disturbance and other systems grade noise
In the case where uninterrupted, zero defect, while high pressure being blocked in except control system, can effectively guarantee the people of operator
Body and system safety.
The utility model further includes display device, and the display device is connect with the MCU single chip processing module signal,
For by MCU single chip processing module analysis treated data real-time display.The utility model uses IIC communication mode
Temperature data real-time display will be measured in OLED display screen, monitored in real time convenient for user.
The A/D analog-to-digital conversion module uses 18 bit pads, which has been internally integrated programmable operation
Amplifier, for small-signal to be carried out corresponding enhanced processing.A/D analog-to-digital conversion module described in the utility model, conversion
Precision is high, simultaneous with programmable operational amplifier, carries out corresponding enhanced processing when measuring small-signal, it is ensured that select most
Good range signal carries out analog-to-digital conversion, further increases conversion accuracy.
The NB-IoT communication module uses NB100 communication module, and the NB100 communication module is gone here and there using module USART
The data of MCU single chip processing module described in mouth protocol realization and the NB100 communication module are transmitted, and the NB100 communicates mould
Block includes radio-frequency antenna, which is used to data being wirelessly transmitted to network.
The MCU single chip processing module uses STM32 single-chip microcontroller.The single-chip microcontroller supports the communication such as USART, SPI, IIC
Mode, there is numerous input and output pins, and the digital signal that STM32 single-chip microcontroller receives A/D analog-to-digital conversion module is analyzed, located
Reason, is shown on the desplay apparatus with IIC communication mode, according to user demand with USART communication mode, realizes the long-range biography of data
It is defeated.
Compared with the existing technology, the beneficial effect of acquirement is the utility model:
The utility model acquires ambient temperature by multichannel Pt100 platinum resistance temperature sensor, by collected mould
Quasi- signal is transferred to A/D analog-to-digital conversion module, is converted to the easy-to-handle digital signal of MCU single chip processing module, MCU monolithic
Machine processing module receives after these signals through analysis, processing, storage, and obtained signal is shown on the desplay apparatus, according to
Family demand can send data to user terminal by NB100 communication module or isolation RS 485 communication module, realize temperature data
Remote transmission wirelessly or non-wirelessly.
The utility model organically combines acquisition terminal and Internet of Things wireless communication module, can efficiently and accurately monitor life
Temperature parameter in producing and living realizes that connection device category is more, and acquisition data coverage is wide, and connection number of users is more, at
This is cheap, low in energy consumption.
The utility model uses the NB100 communication module based on NB-IoT technology, and signal cover is wide, covers than GPRS
Area is 100 times big；Big connection, single sector supports 50,000 connections, than 50 times of GPRS high；Low-power consumption, 5 μ A of minimum consumption, if often
It sends a 200Byte message, and AA battery standby time was up to 10 years；Low cost, mainstream Internet of Things module cost exists at present
20 yuan or so；By MCU single chip processing module, can accomplish in real time to handle the data that temperature sensor receives；
The equipment that NB100 communication module supports UDP/TCP agreement, such as WiFi module, GPRS module, 4G module, serial ports Ethernet mould
Block, computer, mobile phone etc., the available guarantee of data transmit-receive quality.
Detailed description of the invention
Fig. 1 is the structural block diagram of the Internet of Things temperature acquisition terminal described in the utility model based on NB-IoT technology.
Specific embodiment
In order to be clearer and more clear technical problem to be solved in the utility model, technical solution and beneficial effect, with
Under in conjunction with the accompanying drawings and embodiments, the present invention will be further described in detail.
As shown in Figure 1, the utility model embodiment includes sequentially connected temperature sensor module, analog switch switching mould
Block, A/D analog-to-digital conversion module, MCU single chip processing module, communication module.
The temperature sensor module is used for temperature collection analog signal；Temperature sensor module supports multiple sensor same
When temperature is acquired；The temperature sensor module uses Pt100 platinum resistance temperature sensor.
The input terminal of the analog switch switching module is connect with the temperature sensor module signal, output end with it is described
The connection of A/D analog-to-digital conversion module signal, the analog switch switching module is for selecting one or more temperature sensor
Selected temperature analog signal is simultaneously transferred to the A/D analog-to-digital conversion module by the temperature analog signal of module acquisition；Specifically,
The analog switch switching module uses 74HC4052D logical series chip, selects one or more temperature by addressing system
The temperature analog signal of degree sensor module acquisition is handled.
The A/D analog-to-digital conversion module is for the temperature analog signal that the temperature sensor module acquires to be converted into counting
Digital signal is simultaneously sent to MCU single chip processing module by word signal；Specifically, A/D analog-to-digital conversion module is using 18 conversions
Device, 18 bit pad have been internally integrated programmable operational amplifier, for small-signal to be carried out corresponding enhanced processing.
The MCU single chip processing module is used to be carried out by the digital signal after A/D analog-to-digital conversion module conversion
Analysis processing, and signal is sent to the communication module by treated.The MCU single chip processing module of the present embodiment uses
STM32 single-chip microcontroller, specifically, using STM32F103C8T6.
The present embodiment is realized using MCU single-chip microcontroller GPIO pin simulation IIC communication mode and is converted to A/D analog-to-digital conversion module
Digital signal afterwards is handled, therefore MCU single-chip microcontroller GPIO pin is more, and the number supported is more.The present embodiment uses
MCU single chip processing module be 48 pins STM32F103C8T6, wherein GPIO number of pins is at maximum up to 35, therefore props up
The temperature sensor number held is 1~17 tunnel, and the present embodiment is adopted in view of factors such as cost, shell size, power consumption and practicabilities
With 4 tunnel sensor design modes.
The communication module treated for receiving MCU single chip processing module signal, and will be at MCU single-chip microcontroller
Managing module analysis, treated that data are transmitted at a distance；The communication module includes NB-IoT communication module；The NB-
IoT communication module uses NB100 communication module, and the NB100 communication module is using described in the realization of module USART serial port protocol
The data of MCU single chip processing module and the NB100 communication module are transmitted, and NB100 communication module includes radio-frequency antenna, this is penetrated
Frequency antenna is used to data being wirelessly transmitted to network.The present embodiment NB100 communication module is set based on the remote BC95 of shifting
The mini system plate of meter, NB100 contain the circuits such as antenna rf, power supply, SIM card holder, ESD protection, connect with the mains, serial ports
Realize telecommunication.
The communication module of the present embodiment further includes isolation RS 485 communication module, and the isolation RS 485 communication module is using high
Fast optocoupler, isolation RS 485 communication module are connect with MCU single chip processing module signal, and isolation RS 485 communication module is used for will
MCU single chip processing module analysis treated data carry out wired remote transmission.
The present embodiment further includes display device, and the display device is connect with the MCU single chip processing module signal, is used
In by MCU single chip processing module analysis treated data real-time display.The present embodiment will measure temperature using IIC communication mode
Degree factually when be shown in OLED display screen.
As shown in Figure 1, the working principle of the present embodiment is as follows:
1, the temperature sensor module uses three-wire connection, and by providing a reference voltage, which is applied
It is added on Pt100 platinum sensor, MCU single chip processing module may detect tool by detecting the presence of electric current flows through sensor
Which sensor of body, which has, is inserted into and is detecting temperature, when MCU single chip processing module has not detected that electric current flows through biography
When sensor, determine that the sensor is not inserted into or breaks down.MCU single chip processing module will test Pt100 platinum resistance biography
The voltage value of sensor is converted to corresponding resistance value, according to Pt100 platinum sensor phasing meter, can be converted into corresponding temperature
It is worth and is displayed on the screen.
2, the analog switch switching module uses 74HC4052D logical series chip, which has two groups of switches, often
Group selects a switch for four, two anode leads of reference voltage VREF, Pt100 is accessed in analog switch switching modules, by opening
The switching selection of pass and MCU single chip processing module calculate, and can calculate Pt100 line resistance and Pt100 platinum resistance value, can have
Effect eliminates error caused by line resistance, keeps measurement more accurate.
3, the analog quantity that the A/D analog-to-digital conversion module exports analog switch switching module is sent into A/D module, this reality
Example is applied using MCP3421 modulus conversion chip, MCP3421 is 18 successive approximation type a/d converter conversion chips, while internal
Integrated programmable amplifier, when analog switch output signal is too small, lower than MCP3421 conversion Lower Range, MCP3421 will start can
Program operational amplifier function, by selecting suitable amplification factor, make output signal voltage MCP3421 convert nearest range ability it
Interior, measurement accuracy also improves corresponding multiple.
4, isolation RS 485 communication module uses half-duplex operation mode, supports multipoint data communication, while isolation RS 485
Communication module is received using balance transmission and difference, has the ability of very high inhibition common mode interference, therefore transmission range can reach
To far, by the way of isolation, using PS2701A high speed photo coupling, isolation voltage reaches 3750Vrms, while data level becomes
Change in Microsecond grade, data communication requirements can be met.
5, NB100 communication module and isolation RS 485 communication module are all using at module USART serial ports and MCU single-chip microcontroller
Reason module carries out data transmission, and can choose through NB100 radio-frequency antenna according to user demand by data transfer to network,
It can also be transferred in subscriber computer or serial equipment by isolation RS 485 communication module using wired mode.
6, MCU single chip processing module and A/D analog-to-digital conversion module, OLED display screen, NB100 communication module, RS485 are logical
Believe that the peripheral hardwares such as module are connected, MCU single chip processing module receives peripheral hardware request, and keeps data transmission with these peripheral hardwares, simultaneously
It is internally integrated watchdog circuit, when program, which malfunctions, to crash, starting watchdog circuit executes Program reset from the beginning, guarantees detection
It is accurate uninterrupted.
Claims (8)
1. a kind of Internet of Things temperature acquisition terminal based on NB-IoT technology, it is characterised in that: passed including sequentially connected temperature
Sensor module, A/D analog-to-digital conversion module, MCU single chip processing module and communication module；
The temperature sensor module is used for temperature collection analog signal；
The A/D analog-to-digital conversion module, the temperature analog signal for acquiring the temperature sensor module are converted into number
Digital signal is simultaneously sent to the MCU single chip processing module by signal；
The MCU single chip processing module, for will be analyzed by the digital signal after A/D analog-to-digital conversion module conversion
Processing, and signal is sent to the communication module by treated；
The communication module, treated for receiving MCU single chip processing module signal, and MCU single-chip microcontroller is handled
Treated that data are transmitted at a distance for module analysis；The communication module includes NB-IoT communication module；
The temperature sensor module supports multiple sensor to be acquired simultaneously to temperature；
It further include analog switch switching module, the input terminal of the analog switch switching module and the temperature sensor module are believed
Number connection, the output end of analog switch switching module connect with the A/D analog-to-digital conversion module signal, and the analog switch switches
Module is used to select the temperature analog signal of one or more described temperature sensor module acquisition and by selected temperature simulation
Signal is transferred to the A/D analog-to-digital conversion module.
2. a kind of Internet of Things temperature acquisition terminal based on NB-IoT technology as described in claim 1, it is characterised in that: described
Pt100 platinum resistance temperature sensor can be used in temperature sensor module.
3. a kind of Internet of Things temperature acquisition terminal based on NB-IoT technology as claimed in claim 1 or 2, it is characterised in that:
74HC4052D logical series chip can be used in the analog switch switching module, selects one or more by addressing system
The temperature analog signal of temperature sensor module acquisition is handled.
4. a kind of Internet of Things temperature acquisition terminal based on NB-IoT technology as described in claim 1, it is characterised in that: described
Communication module further includes isolation RS 485 communication module, and the isolation RS 485 communication module uses high speed photo coupling, the isolation
RS485 communication module is connect with the MCU single chip processing module signal, and the isolation RS 485 communication module is used for will be described
MCU single chip processing module analysis treated data carry out wired remote transmission.
5. a kind of Internet of Things temperature acquisition terminal based on NB-IoT technology as described in claim 1, it is characterised in that: also wrap
Display device is included, the display device is connect with the MCU single chip processing module signal, and being used for will be at the MCU single-chip microcontroller
Manage module analysis treated data real-time display.
6. a kind of Internet of Things temperature acquisition terminal based on NB-IoT technology as described in claim 1, it is characterised in that: described
A/D analog-to-digital conversion module use 18 bit pads, which has been internally integrated programmable operational amplifier, for will
Small-signal carries out corresponding enhanced processing.
7. a kind of Internet of Things temperature acquisition terminal based on NB-IoT technology as described in claim 1, it is characterised in that: described
NB100 communication module can be used in NB-IoT communication module, and the NB100 communication module is realized using module USART serial port protocol
The data of the MCU single chip processing module and the NB100 communication module are transmitted, and the NB100 communication module includes radio frequency
Antenna, the radio-frequency antenna are used to data being wirelessly transmitted to network.
8. a kind of Internet of Things temperature acquisition terminal based on NB-IoT technology as described in claim 1, it is characterised in that: described
MCU single chip processing module uses STM32 single-chip microcontroller.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110275470A (en) * | 2019-07-12 | 2019-09-24 | 东南大学 | A kind of configurable remote data collection system being applicable in various working |
| CN110392091A (en) * | 2019-03-06 | 2019-10-29 | 苏州工业职业技术学院 | A/D capture card based on NB-iot technology |
| CN110926645A (en) * | 2019-12-19 | 2020-03-27 | 深圳市中新力电子科技有限公司 | Big data monitoring multichannel temperature acquisition circuit |
| CN111121995A (en) * | 2019-12-30 | 2020-05-08 | 上海自动化仪表有限公司 | Multichannel temperature transmitter based on wireless communication technology |
| CN111121994A (en) * | 2019-12-30 | 2020-05-08 | 上海自动化仪表有限公司 | Temperature transmitter based on NB-IoT wireless communication |
| CN111830884A (en) * | 2020-08-11 | 2020-10-27 | 山西和信基业科技股份有限公司 | Low-power consumption sensor acquisition and fusion terminal |
| CN115397045A (en) * | 2022-08-30 | 2022-11-25 | 龚洪雄 | Dual-communication adaptive industrial Internet of things terminal |
-
2018
- 2018-07-18 CN CN201821137666.1U patent/CN208477340U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110392091A (en) * | 2019-03-06 | 2019-10-29 | 苏州工业职业技术学院 | A/D capture card based on NB-iot technology |
| CN110275470A (en) * | 2019-07-12 | 2019-09-24 | 东南大学 | A kind of configurable remote data collection system being applicable in various working |
| CN110926645A (en) * | 2019-12-19 | 2020-03-27 | 深圳市中新力电子科技有限公司 | Big data monitoring multichannel temperature acquisition circuit |
| CN111121995A (en) * | 2019-12-30 | 2020-05-08 | 上海自动化仪表有限公司 | Multichannel temperature transmitter based on wireless communication technology |
| CN111121994A (en) * | 2019-12-30 | 2020-05-08 | 上海自动化仪表有限公司 | Temperature transmitter based on NB-IoT wireless communication |
| CN111830884A (en) * | 2020-08-11 | 2020-10-27 | 山西和信基业科技股份有限公司 | Low-power consumption sensor acquisition and fusion terminal |
| CN115397045A (en) * | 2022-08-30 | 2022-11-25 | 龚洪雄 | Dual-communication adaptive industrial Internet of things terminal |
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