CN206788607U - Internet of Things car-mounted terminal based on radio frequency identification - Google Patents

Abstract

The utility model discloses a kind of Internet of Things car-mounted terminal based on radio frequency identification, it is characterised in that it includes：STM32 microcontrollers, and power module, position locating module, image capture module, human-computer interaction module, memory module, communication module, the active RFID reader/writer module to be intercoupled respectively with the microcontroller, and the active-mode active RFID label tag to be intercoupled with the active RFID reader/writer module.The modularized design clear layer of Internet of Things car-mounted terminal of the present utility model based on radio frequency identification, the division of labor is clear and definite, is advantageous to respectively be designed each module and the maintenance in later stage, improves reliability and the life cycle of total system.

Description

Internet of Things car-mounted terminal based on radio frequency identification

Technical field

Embodiment of the present utility model is related to a kind of car-mounted terminal, more particularly to a kind of Internet of Things car based on radio frequency identification Mounted terminal.

Background technology

More and more flourishing in internet, while shopping at network trading volume is constantly soaring, logistics is right also in fast development The requirement of logistics transportation is also improving.Traditional logistics transportation is fortune of the simple completion goods from place of departure to place of acceptance It is defeated, without effectively being monitored to logistics transportation process, it is impossible in real time to being monitored in real time vehicle on the road, Transport Safety It is required that security cannot be guaranteed during high article, such as when running into the accidents such as traffic accident vehicle on the road, control Center processed can not obtain the positional information of vehicle in time, and processing can not be scheduled to vehicle, and postpone goods has in the way time Cargo mass may be caused to break down, cause unnecessary economic loss.

With the progress of science and technology, the information reform of vehicle is more and more, many car-mounted terminals occurs, most of Car-mounted terminal set has the technologies such as GPS geo-location system, GPRS general packet radio services technology, RFID radio frequency identifications.So And find that the module design of most of car-mounted terminal is more chaotic after actual use, and it is uncoordinated to cooperate, so The defects of reliability is low, life cycle is short, later maintenance difficulty during practice be present.

Utility model content

The purpose of this utility model is to be directed to drawbacks described above of the prior art, there is provided a kind of modularized design level is clear Clear, the division of labor is clear and definite, beneficial to being designed respectively to each module and later maintenance, the Internet of Things vehicle-mounted end based on radio frequency identification End.

To realize above-mentioned purpose of utility model, the utility model employs following technical scheme：One kind is based on radio frequency identification Internet of Things car-mounted terminal, it includes：STM32 microcontrollers, and intercoupled respectively with the microcontroller power module, Position locating module, image capture module, human-computer interaction module, memory module, communication module, active RFID read write line mould Block, and the active-mode active RFID label tag to be intercoupled with the active RFID reader/writer module；Wherein, the power module is used In output 5V, 4V, 3.3V voltage respectively；The position locating module is used to obtain vehicle position information；Described image gathers mould Block is used to monitor vehicle and goods in real time, and preservation capable of taking pictures；The human-computer interaction module is used to show text and picture, and Send instruction and realize that audio plays, curve is shown and data storage；The memory module be used for preserve system initial parameter with And the backup of monitoring data；The communication module is used to every travelling data being uploaded to cloud service platform, and provides on shared Net；The active-mode active RFID label tag is used to be monitored tracking to goods on car.

In addition, the utility model also provides following attached technical scheme：

Preferably, the model STM32F103ZET6 of STM32 microcontrollers, for being responsible for the United Dispatching to each module With control.

Preferably, power module includes 24V-5V power-switching circuits, 24V-4V power-switching circuits and 5V-3.3V Power-switching circuit；Wherein, 24V-5V power-switching circuits are used to 24V input voltages being converted to 5V output voltages, and it includes LM2576HV-5V voltage stabilizing chips and the first input filter capacitor, it is steady that first input filter capacitor is coupling in the LM2576HV-5V The input of chip is pressed, capacitance is 100 μ F；24V-4V power-switching circuits are used to 24V input voltages being converted to 4V outputs Voltage, it includes LM2576HV-ADJ voltage stabilizing chips, the 3rd input filter capacitor, the first output end resistance, the second output end electricity Resistance, the 3rd input filter capacitor are coupling in the input of LM2576HV-ADJ voltage stabilizing chips, and capacitance is 100 μ F, and first exports End resistance and the second output end resistance are coupling in the feedback pin of LM2576HV-ADJ voltage stabilizing chips, resistance value be respectively 1K and 2.2K；5V-3.3V power-switching circuits are used to 5V input voltages being converted to 3.3V output voltages, and it includes AMS1117-3.3 Power supply chip, the 7th input filter capacitor and the 8th output filter capacitor, the 7th input filter capacitor are coupling in AMS1117-3.3 The input of power supply chip, capacitance are 10 μ F, and the 8th output filter capacitor is coupling in the output of AMS1117-3.3 power supply chips End, capacitance is 10 μ F.

Preferably, position locating module includes the Big Dipper/GPS dual-mode receiver and its peripheral circuit.

Preferably, image capture module includes OV7670 imaging sensors and Vimicro picture processing chip VC0706.

Preferably, human-computer interaction module includes industry control serial ports screen and its peripheral circuit.

Preferably, memory module includes FLASH memory and SD card memory, and two memories respectively pass through Spi bus couples with STM32 microcontrollers, and FLASH memory is used for preserving initial parameter, and SD card memory is used to protect Deposit the backup of monitoring data.

Preferably, communication module includes usim card interface, LC6365S chips, UART buses；Usim card interface is used to access SIM card；LC6365S chips carry out signal radiation, and are coupled by UART buses with STM32 microcontrollers.

Preferably, active RFID reader/writer module includes 80C52 single-chip microcomputers and nRF24L01 radio frequency chips；80C52 monolithics Machine couples with STM32 microcontrollers, and the data of SPI-bus analogue control nRF24L01 radio frequency chips send and received； CE pin, CSN pin, SCK pin, MOSI pin, MISO pin and the IRQ pin of nRF24L01 radio frequency chips respectively with 80C52 single-chip microcomputer couplings Close, CRY1 pin coupled oscillatory circuits, ANT1 pin, ANT2 pin, VDD_PA pin coupled antenna match circuits.

Preferably, active-mode active RFID label tag includes nRF24LE1 chips and its peripheral circuit, and nRF24LE1 chips are adopted With 16M crystal oscillators.

Compared to prior art, the advantage of Internet of Things car-mounted terminal of the present utility model is：Using modularized design, its Middle STM32 microcontrollers are responsible for United Dispatching and control to each module, collecting unit --- position locating module, IMAQ Module and active RFID reader/writer module are each responsible for the collection to vehicle and cargo state, communication module be responsible for server and Virtual network operator communicates, including the transmission of instruction and the upload of gathered data.For synthesis, this modularized design level is clear Clear, the division of labor is clear and definite, is advantageous to respectively be designed each module and the maintenance in later stage, improves reliability and the life of total system Cycle of deposit.

Brief description of the drawings

In order to illustrate more clearly of the technical scheme of the utility model embodiment, embodiment or correlation technique will be retouched below The required accompanying drawing used is briefly described in stating, it should be apparent that, it is new that drawings in the following description merely relate to this practicality Some embodiments of type, are not limitation of the utility model.

Fig. 1 is the structured flowchart of the Internet of Things car-mounted terminal of the present utility model based on radio frequency identification.

Fig. 2 is the circuit diagram of 24V-5V power-switching circuits.

Fig. 3 is the circuit diagram of 24V-4V power-switching circuits.

Fig. 4 is the circuit diagram of 5V-3.3V power-switching circuits.

Fig. 5 is that the Big Dipper/GPS dual-mode receiver is connected circuit theory diagrams with STM32 microcontrollers.

Fig. 6 is the circuit diagram of FLASH memory and its peripheral circuit.

Fig. 7 is the circuit diagram of SD memories and its peripheral circuit.

Fig. 8 is the structured flowchart of active RFID reader/writer module.

Fig. 9 is the circuit diagram of nRF24L01 radio frequency chips and its peripheral circuit.

Figure 10 is the circuit diagram of nRF24LE1 chips and its peripheral circuit.

Embodiment

In order to be more clearly understood that above-mentioned purpose of the present utility model, feature and advantage, below in conjunction with the accompanying drawings and tool Body embodiment makees further nonrestrictive detailed description to technical solutions of the utility model.

See Fig. 1, the Internet of Things car-mounted terminal based on radio frequency identification of the present embodiment includes：STM32 microcontrollers 1, power supply It is module 2, position locating module 3, image capture module 4, human-computer interaction module 5, memory module 6, communication module 7, active RFID reader module 8 and active-mode active RFID label tag 9.It is therein, the concrete model that STM32 microcontrollers 1 use for STM32F103ZET6, for being responsible for the United Dispatching to each module and control；Power module 2 be used for respectively export 5V, 4V, 3.3V voltage；Position locating module 3 is used to obtain vehicle position information；Image capture module 4 is used to monitor vehicle and goods in real time Thing, and preservation capable of taking pictures；Human-computer interaction module 5 is used to show text and picture, and sends instruction and realize audio broadcasting, curve Display and data storage；Memory module 6 is used for the backup for preserving system initial parameter and monitoring data；Communication module 7 is used In every travelling data is uploaded into cloud service platform, and provide shared verification；Active RFID reader/writer module 8；It is active to have Source RFID label tag 9 is sent the information such as the ID of goods, classification, batch to STM32 microcontrollers by active RFID reader/writer module 8 Device 1, and then upload onto the server.

In the terminal because type of modules is more, power reguirements are also otherwise varied, because the terminal use is in logistics goods Che Shang's, truck storage battery 24V has high voltage higher and the characteristic of less stable, and in vehicle-mounted monitoring node circuit, STM32 The operating voltage of microcontroller is 3.3V, and the operating voltage of each acquisition module is 5V, and the operating voltage of communication module is 3.4V- 4.5V, it is actual to be powered using 4V.Therefore the Power Management Design of the terminal will at least meet that 24V input voltages export to 5V, 4V and 3.3V The voltage conversion of voltage.

See Fig. 2,24V-5V power-switching circuits are used to 24V input voltages being converted to 5V output voltages, and it mainly includes LM2576HV-5V voltage stabilizing chips, LM2576HV can drive highest 3A load, can meet each module of vehicle-mounted monitoring node Normal use, its input voltage range are 7V-60V, and output voltage is being 1.23-57V under linear and load regulation, therefore can be with Logistics automobile+12V or+24V storage battery power supply is adapted to, and copes with transient voltage and car engine higher during automotive service When instantaneous low-voltage, effectively protect system normal operation.Because the stability of vehicle battery is not high, to prevent in input There is larger transient voltage and voltage pulsation, added between the input+Vin of LM2576HV-5V voltage stabilizing chips and ground One aluminium or tantalum electrochemical capacitor, i.e. the first input filter capacitor C1, this C1 should use short pin and close to power supply, capacitance values For 100uF.Sustained diode 1, output filter capacitor C2 and energy storage are coupled with the output end of LM2576HV-5V voltage stabilizing chips Inductance L1, the positive rated current of sustained diode 1 therein have to be larger than 1.2 times of load current, and pressure voltage also must be big In 1.2 times of input voltage；Output filter capacitor C2 is to obtain a stable output voltage, and capacitance selects 680 μ F To between 2000 μ F；Energy storage inductance L inductance value calculates according to formula (1), and the Vi in formula is LM2576HV input voltage, Iomin is the minimum value of output current, and f is LM2576HV working frequency, and Vo is the output voltage of power supply.

See Fig. 3,24V-4V power-switching circuits are used to 24V input voltages being converted to 4V output voltages, and it mainly includes LM2576HV-ADJ voltage stabilizing chips, due to LM2576HV-ADJ voltage stabilizing chips and the main distinction of LM2576HV-5V voltage stabilizing chips Adjustable for output voltage, the two is identical for the type selecting of input filter capacitor, fly-wheel diode and energy storage inductance, difference It is in and pin is also fed back by the first output end resistance R1 and the second output end resistance R2 connections in LM2576HV-ADJ voltage stabilizing chips FB.In the present embodiment, the first output end resistance R1 resistance value is 1K, and the second output end resistance R2 resistance value is 2.2K.

See Fig. 4,5V-3.3V power-switching circuits are used to 5V input voltages being converted to 3.3V output voltages, and it is mainly wrapped AMS1117-3.3 power supply chips are included, the AMS1117-3.3 power supply chips are one three and rectified to low dropout voltage regulator, input electricity Pressure is maximum up to 15V, can provide 3.3V output voltage and 1A output current.In order to ensure AMS1117-3.3 power supply cores The stability of piece, its input connect an at least 10 μ F tantalum electric capacity, i.e. the 7th input filter capacitor C7；Its output end is same It is 10 μ F that sample, which connects at least 10 μ F tantalum electric capacity, i.e. the 8th input filter capacitor C8, a capacitance,.

The car-mounted terminal of the present embodiment obtains vehicle position information by triones navigation system, and using the side of external antenna Formula increases signal intensity.Car-mounted terminal can be with every 1 second longitude and latitude for receiving vehicle, and velocity information；In addition, Beidou navigation System can obtain the instantaneous velocity of vehicle, and when logistics vehicles speed exceedes predetermined value, STM32 microcontrollers can pass through the mould that communicates Block reminds keeper, keeper can contact vehicle drivers as early as possible and be alerted in time to server alert.

The S1216F8-BD Big Dippeves/GPS bimodulus that the position locating module 3 of the present embodiment is released using SkyTraq companies connects Receive device and its peripheral circuit, the receiver and possess 167 tracking channels, tracking sensitivity is -165dbm, and cold start-up positioning time is 29 seconds, thermal starting positioning time was 1 second, has the good characteristics such as 2.5 meters of circular proable error precision.

Fig. 5 is that the Big Dipper/GPS dual-mode receiver is connected circuit theory diagrams with STM32 microcontrollers.The S1216F8-BD Big Dippeves/ GPS dual-mode receiver supports a variety of communication baud rates, and default baud rate 38400 can also be by serial port setting, and is stored in In memory module.The Big Dipper/GPS dual-mode receiver is powered using 3.3V, and its PPS pin is clock pulses output pin, and port is defeated Going out characteristic can be by program setting, when PPS_LED indicator lamps are often bright in circuit, representation module no-fix；Work as PPS_LED When indicator lamp flashes (500ms is bright, and 500ms goes out), expression positions successfully.IPX ports are used for external active antenna in figure, active Antenna is placed on vehicle top, is preferably beneficial to receive Big Dipper signal.This circuit BAT Chargeable backup batteries can maintain half an hour The Big Dipper/GPS almanac datas preservation, support thermal starting, so as to realize fast positioning.The RXD of the Big Dipper/GPS dual-mode receiver Connect 120 Ohmic resistances with TXD pins, be mainly used in output level compatible processing, and the RXD and the TXD pins also respectively with TX1 with the RX1 ports of STM32 micro controller series 3 connect.The Big Dipper/GPS letters can intuitively be shown by human-computer interaction module Breath, including the information such as precision, latitude, height, speed, the number of satellite for positioning, visible satellite number, UTC time.

Image capture module 4 includes OV7670 imaging sensors and Vimicro picture processing chip VC0706, and support can spirit The JPEG picture output of configuration sized living, maximum reachable 300,000 pixels of image resolution ratio, also supports High Speed UART and SPI interface, The vehicle and goods picture that rapidly needs can be monitored are taken pictures and preserved.

OV7670 is one 1/6 cun of CMOSVGA imaging sensors of OV (OmniVision) company production.The sensor Small volume, operating voltage are low, there is provided the institute of monolithic VGA cameras and image processor is functional., can by SCCB bus marcos By export whole frame, sub-sampling, take window etc. in a manner of 8 image datas of various resolution ratio.

OV7670 imaging sensors have carried source crystal oscillator, are inputted for producing 12M clocks as OV7670 XCLK； Voltage stabilizing chip has been carried simultaneously, for providing the stable 2.8V operating voltages of OV7670, and has carried a fifo chip (AL422B), the capacity of the fifo chip is 384K bytes, stores 2 frame QVGA view data enough.Image capture module 4 By 2*9 double-row pin (P1) with STM32 micro-controller communications.

Human-computer interaction module 5 includes industry control serial ports screen and its peripheral circuit.During connection, it is only necessary to the string of industry control serial ports screen Mouth terminals and host computer LPC1752 serial ports 0 are even good., will first with host computer LPC1752 during Human Machine Interface Pre-designed art designing's picture carries out interface typesetting and control configuration, and industry control serial ports screen can be to each picture, the figure in engineering Piece and control distribute a unique ID number, instruct renewal picture to show according to corresponding serial ports, display content is except text, figure Outside piece, it can be played with audio, curve is shown and data storage.

Memory module 6 includes two parts：Low capacity FLASH memory and Large Copacity SD memories.FLASH memories For preserving some initial parameters such as acquisition interval of system, server ip and port etc..SD memories are used for preserving monitoring number According to backup.FLASH memory and SD memories are all to be communicated using spi bus with microcontroller 1, what microcontroller 1 used It is same SPI1 EBIs.

The FLASH memory of the present embodiment is using W25X16 series.See Fig. 6, FLASH memory is connected using four-wire system： Serial clock pin CLK, chip selection pin CS, serial data output pin DO and serial date transfer output pin DIO.And It is that low level is effective, when SPI1_CS is high level, SPI1_MISO pins will be and SPI1_CS pins enable as chip High-impedance state, FLASH memory now are in holding state, and lower power consumption, when SPI1_CS is low level, chip is in work Make state, instruction can be received., it is necessary to make SPI1_CS produce a trailing edge before an instruction is performed.SPI1_CLK draws Pin is bus clock.SPI1_MISO pins be primary input from output, based on SPI1_MOSI pins output believe from input in clock Number rising edge, data move into FLASH；In the trailing edge of clock signal, data remove FLASH.It is low electricity to keep pin HOLD Flat effective, when its is effective, SPI1_MISO pins will be high-impedance state, and will ignore on SPI1_CLK and SPI1_MOSI pins Signal, to play a part of pause output, it is mainly used in the situation that multiple chips share a SPI interface.Write-protect pin WP Effective for low level, when its is effective, itself memory space can not be written over.

The SD memories of the present embodiment use capacity to meet vehicle-mounted monitoring data for 4GB standard size SDHC cards To the demand of memory space.See Fig. 7, SD memories are communicated by SPI interface with microcontroller 1, the data transfer under SPI modes Speed is slower, but the portability of program is more preferable.SPI interface includes：Chip select pin CS, low level are effective；Clock pins CLK； Data-out pin SPI_MOSI；Data output pins SPI_MISO.External pull-up resistor is needed in each pin of spi bus.

Communication module 7 uses 4G network services, and it includes TD-LTE chips, SIM card and UART buses.TD-LTE chips Using the LC6365S models of connection core science and technology, it includes power supply, usim card interface, USB interface, UART interface, pcm interface, SDIO Interface, control signal etc..SIM card couples the TD-LTE chips by USIM card interfaces, by that will access 4G networks after checking； TD-LTE chips carry out signal radiation, its UART interface connection UART buses, then pass through UART buses and the coupling of microcontroller 1 again Close.Microcontroller 1 is responsible for the controls such as dormancy and wake-up, the data information transfer of 4G communications, is connected by control line with IO, real The opening of existing external trigger is connected with closing function chip.Every travelling data of car-mounted terminal other modules collection can also pass through Communication module 7 is uploaded to cloud service platform, while realizes that users to share is surfed the Net.

Place active-mode active RFID label tag 9 in goods, label sends the information such as the ID of goods, classification, batch to having Source RFID reader module 8, and then upload onto the server, you can grasp whether each goods in vehicle remains unchanged onboard, and can To know the state of goods, when goods needs to be changed, it is only necessary to re-write information to active RFID tag.

See Fig. 8, active RFID reader/writer module 8 includes 80C52 single-chip microcomputers and nRF24L01 radio frequency chips, passes through 80C52 The data of single-chip simulation spi bus control nRF24L01 radio frequency chips send and received, and the serial ports of 80C52 single-chip microcomputers gives over to The interface to be communicated with STM32 microcontrollers 1.Active RFID reader/writer module 8 by UART serial ports with 1 second for interval, will read The ID for writing all labels in the range of device sends back STM32 microcontrollers 1.And inside active RFID reader/writer module 8, by 80C52 single-chip microcomputers are as connection STM32 microcontrollers 1 and the controller of nRF24L01 radio frequency chips.See that Fig. 9, nRF24L01 are penetrated Frequency chip and its peripheral circuit diagram, CE, CSN, SCK, MOSI, MISO, the IRQ on the left side are the interface with 80C52 single-chip microcomputers.CRY1 Vibration is provided for nRF24L01.Right side is the match circuit of antenna.

The design requirement of active-mode active RFID label tag 9 had both met the stabilization of identification function, and and can enough has relatively low be averaged Power consumption extends the usage time of power supply.The active-mode active RFID label tag 9 of the present embodiment is to use nRF24LE1 as radio frequency The active-mode active label of chip, Figure 10 are nRF24LE1 chips and its peripheral circuit diagram, and chip uses Large Copacity CR2032 knobs Battery powered is detained, and uses 16M high speed crystal oscillators, and its radio-frequency head antenna and matching capacitance be basic and RFID reader module one Cause.

Car-mounted terminal of the present utility model functionally meets to image, radio frequency identification, the collection and upload of real time position Primary demand；In structure, using modularized design, wherein STM32 microcontrollers be responsible for the United Dispatching of each module with Control, collecting unit --- position locating module 3, image capture module 4, active RFID reader/writer module 8 are each responsible for car And cargo state collection, communication module 7 be responsible for the communication of server, including instruction transmission and gathered data it is upper Pass, this modularized design clear layer, the division of labor is clear and definite, is advantageous to carry out design of hardware and software and the dimension in later stage to each module respectively Shield, improve reliability and the life cycle of system.

It is pointed out that above-mentioned preferred embodiment is only to illustrate technical concepts and features of the present utility model, its purpose It is to allow person skilled in the art to understand content of the present utility model and implements according to this, this reality can not be limited with this With new protection domain.All equivalent change or modifications made according to the utility model Spirit Essence, should all cover in this reality Within new protection domain.

Claims (10)

1. a kind of Internet of Things car-mounted terminal based on radio frequency identification, it is characterised in that it includes：STM32 microcontrollers, Yi Jifen The power module that is not intercoupled with the microcontroller, position locating module, image capture module, human-computer interaction module, storage Device module, communication module, active RFID reader/writer module, and intercouple with the active RFID reader/writer module active Active RFID tag；

The power module is used to export 5V, 4V, 3.3V voltage respectively；

The position locating module is used to obtain vehicle position information；

Described image acquisition module is used to monitor vehicle and goods in real time, and preservation capable of taking pictures；

The human-computer interaction module is used to show text and picture, and sends instruction and realize that audio plays, curve shows sum According to storage；

The memory module is used for the backup for preserving system initial parameter and monitoring data；

The communication module is used to every travelling data being uploaded to cloud service platform, and provides shared verification；

The active-mode active RFID label tag is used to be monitored tracking to goods on car.

2. the Internet of Things car-mounted terminal according to claim 1 based on radio frequency identification, it is characterised in that：The STM32 is micro- The model STM32F103ZET6 of controller, for being responsible for the United Dispatching to each module and control.

3. the Internet of Things car-mounted terminal according to claim 1 based on radio frequency identification, it is characterised in that：The power module Including 24V-5V power-switching circuits, 24V-4V power-switching circuits and 5V-3.3V power-switching circuits；

The 24V-5V power-switching circuits are used to 24V input voltages being converted to 5V output voltages, and it includes LM2576HV-5V Voltage stabilizing chip and the first input filter capacitor, first input filter capacitor are coupling in the defeated of the LM2576HV-5V voltage stabilizing chips Enter end, capacitance is 100 μ F；

The 24V-4V power-switching circuits are used to 24V input voltages being converted to 4V output voltages, and it includes LM2576HV- ADJ voltage stabilizing chips, the 3rd input filter capacitor, the first output end resistance, the second output end resistance, the 3rd input filter capacitor coupling The input in LM2576HV-ADJ voltage stabilizing chips is closed, capacitance is 100 μ F, the first output end resistance and the second output end resistance The feedback pin of LM2576HV-ADJ voltage stabilizing chips is coupling in, resistance value is respectively 1K and 2.2K；

The 5V-3.3V power-switching circuits are used to 5V input voltages being converted to 3.3V output voltages, and it includes AMS1117- 3.3 power supply chips, the 7th input filter capacitor and the 8th output filter capacitor, the 7th input filter capacitor are coupling in AMS1117- The input of 3.3 power supply chips, capacitance are 10 μ F, and the 8th output filter capacitor is coupling in AMS1117-3.3 power supply chips Output end, capacitance are 10 μ F.

4. the Internet of Things car-mounted terminal according to claim 1 based on radio frequency identification, it is characterised in that：The position positioning Module includes the Big Dipper/GPS dual-mode receiver and its peripheral circuit.

5. the Internet of Things car-mounted terminal according to claim 1 based on radio frequency identification, it is characterised in that：Described image gathers Module includes OV7670 imaging sensors and Vimicro picture processing chip VC0706.

6. the Internet of Things car-mounted terminal according to claim 1 based on radio frequency identification, it is characterised in that：The man-machine interaction Module includes industry control serial ports screen and its peripheral circuit.

7. the Internet of Things car-mounted terminal according to claim 1 based on radio frequency identification, it is characterised in that：The memory mould Block includes FLASH memory and SD card memory, and two memories respectively pass through spi bus and the STM32 microcontrollers Device couples, and the FLASH memory is used for preserving initial parameter, and the SD card memory is used to preserve the standby of monitoring data Part.

8. the Internet of Things car-mounted terminal according to claim 1 based on radio frequency identification, it is characterised in that：The communication module Including usim card interface, LC6365S chips, UART buses；The usim card interface is used to access SIM card；The LC6365S cores Piece carries out signal radiation, and is coupled by UART buses with the STM32 microcontrollers.

9. the Internet of Things car-mounted terminal according to claim 1 based on radio frequency identification, it is characterised in that：The active RFID Reader/writer module includes 80C52 single-chip microcomputers and nRF24L01 radio frequency chips；The 80C52 single-chip microcomputers and STM32 microcontroller couplings Close, and the data of SPI-bus analogue control nRF24L01 radio frequency chips send and received；The CE of the nRF24L01 radio frequency chips Pin, CSN pin, SCK pin, MOSI pin, MISO pin and IRQ pin couple with 80C52 single-chip microcomputers respectively, CRY1 pin coupled oscillatory circuits, ANT1 pin, ANT2 pin, VDD_PA pin coupled antenna match circuits.

10. the Internet of Things car-mounted terminal according to claim 1 based on radio frequency identification, it is characterised in that：It is described active Active RFID tag includes nRF24LE1 chips and its peripheral circuit, and the nRF24LE1 chips use 16M crystal oscillators.