CN113532545A - Wireless temperature acquisition equipment based on LoRa technique - Google Patents

Wireless temperature acquisition equipment based on LoRa technique Download PDF

Info

Publication number
CN113532545A
CN113532545A CN202110944999.5A CN202110944999A CN113532545A CN 113532545 A CN113532545 A CN 113532545A CN 202110944999 A CN202110944999 A CN 202110944999A CN 113532545 A CN113532545 A CN 113532545A
Authority
CN
China
Prior art keywords
pin
resistor
capacitor
mcu controller
module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110944999.5A
Other languages
Chinese (zh)
Inventor
韦力
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Zhongchuang Xingtong Technology Co ltd
Original Assignee
Shenzhen Zhongchuang Xingtong Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Zhongchuang Xingtong Technology Co ltd filed Critical Shenzhen Zhongchuang Xingtong Technology Co ltd
Priority to CN202110944999.5A priority Critical patent/CN113532545A/en
Publication of CN113532545A publication Critical patent/CN113532545A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
    • G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/42—Determining position
    • G01S19/48—Determining position by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link

Abstract

The utility model provides a wireless temperature acquisition equipment based on loRa technique for the real-time location and the temperature and humidity control of cold chain logistics transportation mainly include: the invention utilizes the characteristics of strong signal penetrability, long-distance transmission, low power consumption, multiple nodes, low cost and flexible network distribution mode of the LoRa technology, and adopts a GPS and LBS double positioning mode to arrange a local storage unit, thereby solving the problems that the prior art can not realize independent monitoring of multiple temperature zones, has weak signal penetrability, short transmission distance, no blind spot data supplementary transmission, can not store data when a network or a server fails, the data reporting frequency can not be adjusted, the positioning mode is single, the positioning can not be carried out when no GPS signal or GPS signal is weak, and the transmitting intensity and the receiving sensitivity are not high.

Description

Wireless temperature acquisition equipment based on LoRa technique
Technical Field
The invention relates to the technical field of information acquisition of the Internet of things, in particular to a wireless temperature acquisition device based on an LoRa technology.
Background
For cold chain logistics transportation, real-time positioning and temperature and humidity monitoring are required in the whole process to ensure the quality of goods. The existing wireless temperature and humidity acquisition equipment mostly adopts Bluetooth, WIFI and GSM modes to transmit signals and GPS positioning, and the existing main problems are as follows: the method has the advantages of high power consumption, high cost, incapability of realizing independent monitoring of a multi-temperature zone, short transmission distance, weak signal penetrability, no blind spot data supplementary transmission, incapability of storing data when a network or a server fails, unadjustable data reporting frequency, single positioning mode, incapability of positioning when no GPS signal exists or the GPS signal is weak, and low transmitting intensity and receiving sensitivity.
The powerful signals of the LoRa technology can penetrate buildings and cover a wide range even in dense urban areas. This allows one LoRa-based gateway to cover multiple buildings within a 2 kilometer range. The advantages of LoRa are mainly reflected in several aspects. The receiving sensitivity is greatly improved, and the power consumption is reduced. A link budget of up to 157db makes its communication distance up to 15 km (irrespective of the circumstances). The receiving current is only 10mA, and the sleep current is 200nA, so that the service life of the battery is greatly prolonged. The gateway/concentrator based on the technology supports the parallel processing of multi-channel and multi-data rate, and the system capacity is large. If the gateway is installed at the position of the existing mobile communication base station, the transmitting power is 20dbm (100mW), the coverage can be about two kilometers in the urban environment with dense buildings, and the coverage can reach 10 kilometers in the suburban area with lower density. A terminal and concentrator/gateway based system may support ranging and positioning. The LoRa distance measurement is based on the air time of transmission of the signal rather than the conventional RSSI, and the location is based on the measurement of the air time difference of multiple points to one point. The positioning precision can reach 5 meters. Therefore, the temperature and humidity real-time monitoring of goods is realized by adopting the LoRa technology for cold chain logistics transportation in non-long distance (such as in the city and the local area), and the problems that the existing wireless temperature and humidity acquisition equipment adopts Bluetooth, WIFI and GSM modes to transmit signals, the high power consumption and the high cost cannot realize independent monitoring of a multi-temperature area, the transmission distance is short, and the signal penetrability is weak are solved well.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a wireless temperature acquisition device based on an LoRa technology, which utilizes the characteristics of strong signal penetrability, long-distance transmission, low power consumption, multiple nodes, low cost and flexible network distribution mode of the LoRa technology, and adopts a GPS and LBS dual positioning mode to arrange a local storage unit so as to solve the problems that the prior art cannot realize independent monitoring of multiple temperature zones, has weak signal penetrability, short transmission distance, no blind point data supplementary transmission, cannot store data when a network or a server has faults, cannot adjust data reporting frequency, has a single positioning mode, cannot position when no GPS signal or GPS signal is weak, and has low transmitting intensity and receiving sensitivity.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a wireless temperature acquisition equipment based on loRa technique for real-time location and temperature and humidity control of cold chain logistics transportation includes:
the system comprises a GPS positioning module, an LBS positioning module, a temperature and humidity sensor module and a main control unit, wherein the GPS positioning module is used for converting received global positioning system signals into GPS position information and transmitting the GPS position information to the main control unit, the LBS positioning module is used for converting signals obtained through a three-base-station positioning mode into LBS position information and transmitting the LBS position information to the main control unit, and the temperature and humidity sensor module is used for transmitting environment temperature and humidity information acquired in real time to the main control unit;
the LoRa communication module is used for uploading the GPS position information, the LBS position information and the environment temperature and humidity information which are processed and analyzed by the main control unit to an Internet of things management platform;
the lithium battery management system comprises a lithium battery power supply module, a voltage adjusting module and a low-power-consumption management module, wherein the lithium battery power supply module is used for charging and discharging management of a lithium battery, the voltage adjusting module is used for adjusting the voltage output by the lithium battery power supply module into a stable working voltage and then providing a working power supply for the main control unit and the LoRa communication module through the low-power-consumption management module, and the low-power-consumption management module is used for realizing low power consumption of the main control unit and the LoRa communication module so as to prolong the endurance time of the lithium battery;
the detaching alarm unit sends an obtained detaching signal to the main control unit through an external sensor so that the main control unit sends detaching alarm information to the Internet of things management platform through the LoRa communication module;
the storage unit is used for storing the processing data of the main control unit;
a JLINK download interface for downloading and updating the control program of the main control unit;
the crystal oscillator unit is used for generating a clock frequency signal necessary for the main control unit to execute the instruction;
the power-on reset unit is used for providing a reset function for the main control unit;
the indicating lamp unit is used for displaying whether the working state of the main control unit is normal or not;
the battery voltage detection unit is used for detecting whether the voltage of the lithium battery is in a normal range or not, if the voltage of the lithium battery is lower than the normal range, the main control unit sends out charging assignment to the lithium battery power supply module, and if the voltage of the lithium battery is higher than the normal range, the main control unit sends out charging stop assignment to the lithium battery power supply module;
the main control unit respectively with GPS orientation module LBS orientation module temperature and humidity sensor module LoRa communication module the pilot lamp unit demolish alarm unit power-on reset unit crystal oscillator unit JLINK downloads the interface the storage unit battery voltage detecting element lithium cell power module and low power consumption management module electrical property links to each other, low power consumption management module still with LoRa communication module electrical property links to each other, lithium cell power module still respectively with voltage adjustment module with low power consumption management module electrical property links to each other, voltage adjustment module still with low power consumption management module electrical property links to each other.
The working principle of the wireless temperature acquisition equipment is as follows:
the wireless temperature acquisition equipment is fixedly arranged at different positions of a container where temperature acquisition is needed, after the wireless temperature acquisition equipment is powered on and starts to work, the GPS positioning module sends the GPS position information acquired in real time to the main control unit, the LBS positioning module sends the LBS position information acquired in real time to the main control unit, the temperature and humidity sensor module transmits the environment temperature and humidity information acquired in real time to the main control unit, the main control unit processes and analyzes the GPS position information, the LBS position information and the environment temperature and humidity information and then transmits the environment temperature and humidity information to the LoRa communication module, and the LoRa communication module receives the data transmitted by the main control unit: GPS positional information, LBS positional information and environment humiture information send thing networking management platform, like this, realized remote communication through the loRa technique between wireless temperature acquisition equipment and the thing networking management platform.
Specifically, the GPS positioning module includes a CPU, a GPS baseband chip and an RFRF radio frequency chip, the GPS positioning module receives and demodulates a broadcast C/a code signal of a satellite like a radio, the center frequency is 1575.42MHz, the GPS module does not broadcast a signal, and belongs to passive positioning, the GPS positioning module calculates a pseudo distance with each satellite by calculating the pseudo distance with each satellite, and calculates four parameters of longitude, latitude, altitude and time correction of the receiver by using a distance intersection method, and is characterized by a fast point location speed but a large error; at least 4 satellites are needed for calculation in the primary positioning, which is called 3D positioning, and 2D positioning can be realized by 3 satellites, but the precision is poor; the GPS positioning module continuously outputs positioning information and auxiliary information in an NMEA format through a serial communication port for a receiver to select and apply, and can realize all-weather, continuous and real-time three-dimensional navigation positioning, speed measurement and high-precision precise positioning in a global range; preferably, the model of the GPS positioning module is SKG 12A.
Specifically, the LBS location module is an SIM card, and the location is implemented by a mobile signal sent by the SIM card using a base station network location technology.
Specifically, the LoRa communication module adopts a linear modulation spread spectrum mode, so that the receiving sensitivity of the LoRa communication module can be obviously improved, a communication distance longer than that of other modulation technologies is realized, a base station is not required to be built in the LoRa technology, more equipment can be controlled by one gateway, the network distribution mode is flexible, and the construction cost can be greatly reduced; preferably, the model of the LoRa communication module is LoRa 1278.
Further, the main control unit includes: the MCU controller U2, the inductor L1, the capacitors C14 and C15 and the resistor R14; the model of the MCU controller U2 is STM32L151, and the inductor L1 is an inductor with a magnetic core or an iron core; a pin 8 of the MCU controller U2 is sequentially connected to one end of the capacitor C15 and one end of the capacitor C14 and then grounded, the other end of the capacitor C14 is connected to the other end of the capacitor C15 and then connected to a pin 9 of the MCU controller U2, the pin 9 of the MCU controller U2 is further connected to one end of the inductor L1, the other end of the inductor L1 is connected to a power supply voltage of 3.3V, a pin 20 of the MCU controller U2 is connected to one end of the resistor R14, the other end of the resistor R14 is grounded, a pin 23, a pin 35 and a pin 47 of the MCU controller U2 are respectively grounded, and a pin 1, a pin 24 and a pin 36 of the MCU controller U2 are respectively connected to the power supply voltage of 3.3V;
the pin 12, the pin 13, the pin 38, the pin 39, the pin 40 and the pin 41 of the MCU controller U2 are used to connect with the LoRa communication module, so as to realize remote communication with the internet of things management platform through the LoRa communication module, wherein, the pin 12 of the MCU controller U2 is RXD _ LORA for receiving the data transmitted by the LORA signaling module, pin 13 of the MCU controller U2 is TXD _ LORA for transmitting data of the MCU controller U2 to the LORA communication module, the pin 39 of the MCU controller U2 is an enable terminal LoRa _ EN that triggers the LoRa communication module, the pin 38 of the MCU controller U2 is an interface terminal AUX _ LoRa connected to the LoRa communication module, the pin 40 of the MCU controller U2 is an interface MD1_ LoRa connected to the LoRa communication module, a pin 41 of the MCU controller U2 is an interface end MD0_ LoRa connected to the LoRa communication module;
a pin 42 and a pin 43 of the MCU controller U2 are I2C buses and are used to connect the temperature and humidity sensor module, wherein the pin 42 of the MCU controller U2 is a control line SCL _ ST32 and is used to output a control signal to the temperature and humidity sensor module, and the pin 43 of the MCU controller U2 is a data line SDA _ ST32 and is used to receive the environment temperature and humidity information transmitted by the temperature and humidity sensor module;
a pin 3 and a pin 4 of the MCU controller U2 are used to connect the crystal oscillator unit, where the pin 3 of the MCU controller U2 is a crystal oscillator signal input terminal OSC _ IN32, and the pin 4 of the MCU controller U2 is a crystal oscillator signal input terminal OSC _ OUT 32;
the pin 34 and the pin 37 of the MCU controller U2 are used to connect the JLINK download interface, wherein the pin 34 of the MCU controller U2 is a hardware Debug interface Debug _ SWDIO, and the pin 37 of the MCU controller U2 is a hardware Debug interface Debug _ SWCLK;
a pin 33 of the MCU controller U2 is used for connecting the dismounting alarm unit, wherein the pin 33 of the MCU controller U2 is an alarm signal terminal KEY _ ALERT;
a pin 29 and a pin 32 of the MCU controller U2 are used to connect the indicator light units, wherein the pin 29 of the MCU controller U2 is a RED light signal terminal LED _ RED, and the pin 32 of the MCU controller U2 is a BLUE light signal terminal LED _ BLUE;
a pin 14, a pin 15, a pin 16, and a pin 17 of the MCU controller U2 are used to connect the memory unit, wherein the pin 14 of the MCU controller U2 is a chip select signal terminal FLASH _ NSS, the pin 15 of the MCU controller U2 is a clock signal terminal FLASH _ CLK, the pin 16 of the MCU controller U2 is a data output terminal FLASH _ DOUT, and the pin 17 of the MCU controller U2 is a data input terminal FLASH _ DIN;
a pin 7 of the MCU controller U2 is used to connect the power-on reset unit, and the pin 7 of the MCU controller U2 is a reset terminal MCU _ RST;
a pin 25 of the MCU controller U2 is used for connecting the lithium battery power supply module, wherein the pin 25 of the MCU controller U2 is a charging control terminal BAT _ CHG;
a pin 10 and a pin 10 of the MCU controller U2 are used to connect the battery voltage detection unit, a pin 11 of the MCU controller U2 is further connected to the low power consumption management module, the pin 10 of the MCU controller U2 is a battery voltage sampling enable terminal ADC _ EN, and the pin 11 of the MCU controller U2 is a battery voltage sampling input terminal ADC _ BAT;
the MCU controller U2 is connected with the GPS positioning module and the LBS positioning module through serial ports arranged in the MCU controller U2 to exchange data.
Further, the temperature and humidity sensor module includes: a temperature and humidity sensor U4, resistors R3 and R4; the model of the temperature and humidity sensor U4 is SHT 30; pin 1 of temperature and humidity sensor U4 connects the one end of resistance R3, the other end of resistance R3 is connected data line SDA _ ST32, pin 4 of temperature and humidity sensor U4 connects the one end of resistance R4, the other end of resistance R4 is connected control line SCL _ ST32, pin 5 of temperature and humidity sensor U4 connects mains voltage 3.3V, pin 7 and pin 8 of temperature and humidity sensor U4 link to each other the back ground connection.
Further, the lithium battery power supply module includes: a lithium battery charging management chip U18, a lithium battery interface X3, an external power interface X4, test points TP1, TP2, TP3, Schottky diodes TV6 and TV7, capacitors C49, C50, C51, C52, C53, C54, C65, C66, C68 and C69, an inductor L5, resistors R15, R19, R20, R25, R26, R27, R28, R29, R30, R31, R32, R93 and R94; the lithium battery charging management chip U18 is of a model number BQ25895, and is a highly integrated 5A switch mode battery charging management and system power supply path management device suitable for lithium ion batteries and lithium polymer batteries; the external power interface X4 is a Micro-USB;
pin 1 of the lithium battery charging management chip U18 is sequentially connected to one end of the capacitor C68, one end of the capacitor C69, the test point TP1, and pin 1 of the external power interface X1, the other end of the capacitor C68 is connected to the other end of the capacitor C69 and then connected to analog ground, pin 2 of the external power interface X1 is connected to the negative electrode of the schottky diode TV7, pin 3 of the external power interface X1 is connected to the negative electrode of the schottky diode TV6, the positive electrode of the schottky diode TV6 is connected to the positive electrode of the schottky diode TV7 and then connected to ground, pin 5 of the external power interface X1 is connected to analog ground, pin 2 of the lithium battery charging management chip U18 is connected to one end of the resistor R15, pin 3 of the lithium battery charging management chip U18 is connected to the other end of the resistor R15, and pin 4 of the lithium battery charging management chip U18 is respectively connected to one end of the resistor R29 and the charging control terminal CHG _ BAT, a pin 5 of the lithium battery charging management chip U18 is connected to one end of the resistor R28 and one end of the resistor R25, respectively, the other end of the resistor R25 is connected to an M26 serial port control line, a pin 6 of the lithium battery charging management chip U18 is connected to one end of the resistor R27 and one end of the resistor R19, the other end of the resistor R19 is connected to an M26 serial port data line, the other end of the resistor R29, the other end of the resistor R28 and the other end of the resistor R27 are connected to 2.8V, a pin 8 of the lithium battery charging management chip U18 is connected to one end of the resistor R30 and the terminal OTG, respectively, the other end of the resistor R30 is grounded, a pin 9 of the lithium battery charging management chip U18 is connected to one end of the resistor R31, the other end of the resistor R31 is grounded, a pin 10 of the lithium battery charging management chip U18 is connected to one end of the resistor R32, a pin 11 of the lithium battery charging management chip U18 is connected to one end of the resistor R26 and one end of the resistor R20, respectively, the other end of the resistor R26 is connected to the other end of the resistor R32 and then grounded, the other end of the resistor R20 is connected to a pin 22 of the lithium battery charging management chip U18, a pin 13 and a pin 14 of the lithium battery charging management chip U18 are connected to one end of the capacitor C53 and one end of the capacitor C54, respectively, the other end of the capacitor C53 and the other end of the capacitor C54 are connected to an analog ground, one end of the capacitor C54 is further connected to a pin 2 of the test point TP3 and the lithium battery interface X3, a pin 1 of the lithium battery interface X3 is connected to the analog ground, a pin 15 and a pin 16 of the lithium battery charging management chip U18 are connected to one end of the inductor L5 and one end of the capacitor C65, a pin 17 and a pin 18 of the lithium battery charging management chip U18 are connected and then connected to a simulated ground, a pin 19 and a pin 20 of the lithium battery charging management chip U18 are connected and then connected to the other end of the inductor L5 and one end of the capacitor C51, the other end of the inductor L5 is further connected to one end of the capacitor C51, one end of the capacitor C65 is further connected to one end of the capacitor C66, the other end of the capacitor C65 is connected to the other end of the capacitor C66 and then connected to the ground, one end of the capacitor C66 is further connected to the test point TP2 and the voltage adjustment module, a pin 21 of the lithium battery charging management chip U18 is connected to one end of the resistor R94, the other end of the resistor R94 is connected to the other end of the capacitor C51, a pin 21 of the lithium battery charging management chip U18 is further connected to one end of the capacitor C50, and the other end of the capacitor C50 is connected to the ground, the pin 23 of the lithium battery charging management chip U18 is respectively connected with one end of the capacitor C52 and one end of the capacitor C49, the other end of the capacitor C52 is connected with the other end of the capacitor C49 and then connected with a simulation ground, the pin 24 of the lithium battery charging management chip U18 is connected with one end of the resistor R93, and the other end of the resistor R93 is connected with the low-power management module.
Further, the voltage adjustment module includes: the voltage regulation circuit comprises a voltage regulation chip U5, capacitors C15 and C16 and a test point TP 4; the model of the voltage adjusting chip U5 is XC6206P 302M; the pin 3 of the voltage adjusting chip U5 is respectively connected with one end of the capacitor C15 and the lithium battery power supply module, the other end of the capacitor C15 is connected with the pin 1 of the voltage adjusting chip U5 and then grounded, the pin 2 of the voltage adjusting chip U5 is sequentially connected with one end of the capacitor C16 and the test point TP4 and then connected with the low-power-consumption management module, and the other end of the capacitor C16 is connected with the pin 1 of the voltage adjusting chip U5 and then grounded.
Further, the low power management module includes: a mixed signal microcontroller chip U6, a download program interface J2, a crystal oscillator Y1, Schottky diodes TV2 and TV3, capacitors C17, C18, C19 and C20, resistors R6, R16, R17, R18, R23 and R24; the mixed signal microcontroller chip U6 is of a model MSP430FR2433IRGE, and combines a unique embedded FRAM with a comprehensive ultra-low power consumption system architecture, so that system designers can reduce energy consumption and improve performance at the same time; the download program interface J2 is used for connecting a debugging device externally to download and update the control program of the mixed signal microcontroller chip U6;
pin 1 of the mixed signal microcontroller chip U6 is connected to one end of the resistor R16 and one end of the resistor R18, the other end of the resistor R16 is connected to one end of the capacitor C18 and one end of the capacitor C17 in sequence and then is connected to pin 24 of the mixed signal microcontroller chip U6, pin 2 of the mixed signal microcontroller chip U6 is connected to one end of the resistor R17, the other end of the resistor R17 is connected to the cathode of the schottky diode TV2 and pin 1 of the download program interface J2, the other end of the resistor R18 is connected to the cathode of the schottky diode TV3 and pin 2 of the download program interface J2, the anode of the schottky diode TV2 is connected to the anode of the schottky diode TV3 and then is grounded, pin 3 of the download program interface J2 is grounded, pin 3 of the mixed signal microcontroller chip U6 is connected to one end of the resistor R24, the other end of the resistor R24 is connected to one end of the resistor R22 and an M26 serial data receiving end respectively, the other end of the resistor R22 is grounded, the pin 4 of the mixed signal microcontroller chip U6 is connected to one end of the resistor R23, the other end of the resistor R23 is connected to an M26 serial data transmitting end, the pin 7 of the mixed signal microcontroller chip U6 is connected to one end of the resistor R6, the other end of the resistor R6 is connected to the battery voltage sampling input terminal ADC _ BAT, the pin 21 of the mixed signal microcontroller chip U6 is connected to one end of the crystal oscillator Y1 and one end of the capacitor C20 respectively, the pin 22 of the mixed signal microcontroller chip U6 is connected to the other end of the crystal oscillator Y1 and one end of the capacitor C19 respectively, the other end of the capacitor C19 is connected to the other end of the capacitor C20 and then grounded, and the pin 23 of the mixed signal microcontroller chip U6 is connected to the other end of the capacitor C17 and the other end of the capacitor C18 in sequence And then grounded.
Further, the memory cell comprises a memory chip U1, a capacitor C1 and a resistor R18; the model of the storage chip U1 is W25Q64 FVSIG, and is an 8M byte Flash chip; a pin 6 of the memory chip U1 is connected to the clock signal terminal FLASH _ CLK, a pin 5 of the memory chip U1 is connected to the data input terminal FLASH _ DIN, a pin 2 of the memory chip U1 is connected to the data output terminal FLASH _ DOUT, a pin 1 of the memory chip U1 is connected to the chip select signal terminal FLASH _ NSS, a pin 4 of the memory chip U1 is grounded, a pin 7 and a pin 3 of the memory chip U1 are connected to one end of the resistor R18 after being connected to each other, a pin 8 of the memory chip U1 is connected to the other end of the resistor R18 and one end of the capacitor C1, the other end of the capacitor C1 is grounded, and a pin 8 of the memory chip U1 is also connected to a power supply voltage of 3.3V.
Further, the dismantling alarm unit comprises an inductor interface P1 and a resistor R16, the inductor interface P1 is used for externally connecting an inductor and sending an inductor signal to the warning signal end KEY _ ALERT, a pin 3 and a pin 4 of the inductor interface P1 are connected and then grounded, a pin 1 and a pin 2 of the inductor interface P1 are connected and then respectively connected with one end of the resistor R16 and the warning signal end KEY _ ALERT, and the other end of the resistor R16 is connected with a power supply voltage of 3.3V.
Further, the power-on reset unit includes a reset interface J3, a resistor R12, and a capacitor C13, where the reset interface J3 is used to access a reset button, a pin 2 of the reset interface J3 is grounded, a pin 1 of the reset interface J3 is connected to one end of the resistor R12 and one end of the capacitor C13, one end of the capacitor C13 is further connected to the reset terminal MCU _ RST, the other end of the capacitor C13 is grounded, and the other end of the resistor R12 is connected to a power voltage of 3.3V;
the JLINK download interface comprises a download program interface J1, the download program interface J1 is used for externally connecting debugging equipment to download and update the control program of the MCU controller U2, pin 4 of the download program interface J1 is grounded, pin 3 of the download program interface J1 is connected with the hardware debugging interface Debug _ SWCLK, pin 2 of the download program interface J1 is connected with the hardware debugging interface Debug _ SWDIO, and pin 1 of the download program interface J1 is connected with the power supply voltage 3.3V.
Further, the crystal oscillation unit includes: a crystal oscillator Y2, capacitors C10 and C12; one end of the crystal oscillator Y2 is connected to one end of the capacitor C10 and the crystal oscillator signal input terminal OSC _ IN32, and the other end of the crystal oscillator Y2 is connected to one end of the capacitor C12 and the crystal oscillator signal input terminal OSC _ OUT 32;
the indicator light unit includes: light emitting diodes HL1 and HL2, resistors R9 and R13; the light emitting diode HL1 emits BLUE light, the light emitting diode HL2 emits RED light, the anode of the light emitting diode HL1 is connected with the BLUE light signal end LED _ BLUE, the cathode of the light emitting diode HL1 is connected with one end of the resistor R13, the other end of the resistor R13 is connected with a terminal GND, the anode of the light emitting diode HL2 is connected with the RED light signal end LED _ RED, the cathode of the light emitting diode HL2 is connected with one end of the resistor R9, and the other end of the resistor R9 is connected with the terminal GND;
the battery voltage detection unit comprises resistors R6 and R7, one end of the resistor R6 is connected with the battery voltage VBAT, the other end of the resistor R6 is connected with the battery voltage sampling input end ADC _ BAT and one end of the resistor R7 respectively, and the other end of the resistor R7 is connected with the battery voltage sampling enable end ADC _ EN.
The invention has the beneficial effects that the wireless temperature acquisition equipment based on the LoRa technology is used for real-time positioning and temperature and humidity monitoring of cold-chain logistics transportation and mainly comprises the following components: compared with the prior art, the invention has the following advantages that:
(1) the characteristics of strong signal penetrability, long-distance transmission, low power consumption, multiple nodes, low cost and flexible network distribution mode of the LoRa technology are utilized, and the problems that independent monitoring of multiple temperature zones cannot be realized, the signal penetrability is weak, the transmission distance is short, and the transmitting intensity and the receiving sensitivity are not high in the prior art are solved;
(2) by adopting a GPS and LBS dual positioning mode, the problem that the positioning mode is single, and the positioning cannot be carried out when no GPS signal exists or the GPS signal is weak in the prior art is solved;
(3) by setting the local storage unit, the problems that blind-spot-free data supplementary transmission, data cannot be stored when a network or a server fails and the data reporting frequency is not adjustable in the prior art are solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a system block diagram of a wireless temperature acquisition device based on the LoRa technology according to an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of a main control unit of a wireless temperature acquisition device based on the LoRa technology according to an embodiment of the present invention.
Fig. 3 is a schematic circuit diagram of a temperature and humidity sensor module of a wireless temperature acquisition device based on the LoRa technology according to an embodiment of the present invention.
Fig. 4 is a schematic circuit diagram of a lithium battery power supply module of a wireless temperature acquisition device based on the LoRa technology according to an embodiment of the present invention.
Fig. 5 is a schematic circuit diagram of a voltage adjustment module of a wireless temperature acquisition device based on the LoRa technology according to an embodiment of the present invention.
Fig. 6 is a schematic circuit diagram of a low power consumption management module of a wireless temperature acquisition device based on the LoRa technology according to an embodiment of the present invention.
Fig. 7 is a schematic circuit diagram of a memory cell of a wireless temperature acquisition device based on the LoRa technology according to an embodiment of the present invention.
Fig. 8 is a schematic circuit diagram of a detachment alarm unit of a wireless temperature acquisition device based on the LoRa technology according to an embodiment of the present invention.
Fig. 9 is a schematic circuit diagram of a power-on reset unit of a wireless temperature acquisition device based on the LoRa technology according to an embodiment of the present invention.
Fig. 10 is a schematic diagram of a JLINK download interface circuit of a wireless temperature acquisition device based on the LoRa technology according to an embodiment of the present invention.
Fig. 11 is a schematic circuit diagram of a crystal oscillator unit of a wireless temperature acquisition device based on the LoRa technology according to an embodiment of the present invention.
Fig. 12 is a schematic circuit diagram of an indicator light unit of a wireless temperature acquisition device based on the LoRa technology according to an embodiment of the present invention.
Fig. 13 is a schematic circuit diagram of a battery voltage detection unit of a wireless temperature acquisition device based on the LoRa technology according to an embodiment of the present invention.
The label in the above figure is 1, the master control unit; 11. a storage unit; 12. JLINK download interface; 13. a crystal oscillation unit; 14. a power-on reset unit; 15. an indicator light unit; 16. the alarm unit is removed; 17. a battery voltage detection unit; 21. a GPS positioning module; 22. an LBS positioning module; 23. a temperature and humidity sensor module; 31. a lithium battery power supply module; 32. a voltage adjustment module; 33. a low power consumption management module; 4. a LoRa communication module; 01. an Internet of things management platform.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
The technical solution of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 13, the preferred embodiment of the present invention is provided.
Referring to fig. 1, the wireless temperature acquisition device based on the LoRa technology provided by the invention is used for real-time positioning and temperature and humidity monitoring of cold-chain logistics transportation, and comprises:
the system comprises a GPS positioning module 21, an LBS positioning module 22, a temperature and humidity sensor module 23 and a main control unit 1, wherein the GPS positioning module 21 is used for converting received global positioning system signals into GPS position information and transmitting the GPS position information to the main control unit 1, the LBS positioning module 22 is used for converting signals obtained through a three-base-station positioning mode into LBS position information and transmitting the LBS position information to the main control unit 1, and the temperature and humidity sensor module 23 is used for transmitting environment temperature and humidity information acquired in real time to the main control unit 1;
the loRa communication module 4 is used for uploading the GPS position information, the LBS position information and the environment temperature and humidity information which are processed and analyzed by the main control unit 1 to the Internet of things management platform 01;
the lithium battery charging system comprises a lithium battery power supply module 31, a voltage adjusting module 32 and a low power consumption management module 33, wherein the lithium battery power supply module 31 is used for charging and discharging management of a lithium battery, the voltage adjusting module 32 is used for adjusting the voltage output by the lithium battery power supply module 31 into a stable working voltage and then providing a working power supply for the main control unit 1 and the LoRa communication module 4 through the low power consumption management module 33, and the low power consumption management module 33 is used for realizing low power consumption of the main control unit 1 and the LoRa communication module 4 so as to prolong the endurance time of the lithium battery;
the method comprises the following steps that a dismantling alarm unit 16 is removed, the dismantling alarm unit 16 sends an obtained dismantling signal to a main control unit 1 through an external inductor, so that the main control unit 1 sends dismantling alarm information to an internet of things management platform 01 through a LoRa communication module 4;
a storage unit 11, wherein the storage unit 11 is used for storing the processing data of the main control unit 1;
the JLINK download interface 12, the JLINK download interface 12 is used for the control program download and update of the main control unit 1;
the crystal oscillator unit 13, the crystal oscillator unit 13 is used for generating the clock frequency signal necessary for the main control unit 1 to execute the instruction;
a power-on reset unit 14, wherein the power-on reset unit 14 is used for providing a reset function for the main control unit 1;
the indicator light unit 15, the indicator light unit 15 is used for revealing whether the working condition of the main control unit 1 is normal;
the battery voltage detection unit 17 is used for detecting whether the voltage of the lithium battery is in a normal range or not, if the voltage of the lithium battery is lower than the normal range, the main control unit 1 sends out charging assignment to the lithium battery power supply module 31, and if the voltage of the lithium battery is higher than the normal range, the main control unit 1 sends out stopping charging assignment to the lithium battery power supply module 31;
the main control unit 1 is respectively connected with the GPS positioning module 21, the LBS positioning module 22, the temperature and humidity sensor module 23, the LoRa communication module 4, the indicator light unit 15, the removal alarm unit 16, the power-on reset unit 14, the crystal oscillator unit 13, the JLINK download interface 12, the storage unit 11, the battery voltage detection unit 17, the lithium battery power supply module 31 and the low power consumption management module 33 are electrically connected, the low power consumption management module 33 is also electrically connected with the LoRa communication module 4, the lithium battery power supply module 31 is also electrically connected with the voltage adjustment module 32 and the low power consumption management module 33, and the voltage adjustment module 32 is also electrically connected with the low power consumption management module 33.
The working principle of the device is as follows:
this equipment fixed mounting is in the different positions that need the temperature of collection in the container, this equipment is electrified after beginning work, GPS positioning module 21 sends the GPS positional information who obtains in real time to main control unit 1, LBS positioning module 22 sends the LBS positional information who obtains in real time to main control unit 1, temperature and humidity sensor module 23 conveys the environment humiture information of real time collection to main control unit 1, main control unit 1 is to GPS positional information, LBS positional information and environment humiture information carry out the processing analysis back, convey to loRa communication module 4, loRa communication module 4 is with the data of the transmission of received main control unit 1: GPS position information, LBS position information and environment temperature and humidity information send thing networking management platform 01, like this, realized remote communication through the loRa technique between this equipment and thing networking management platform 01.
Specifically, the GPS positioning module 21 includes a CPU, a GPS baseband chip and an RFRF radio frequency chip, the GPS positioning module 21 receives and demodulates a broadcast C/a code signal of a satellite like a radio, the center frequency is 1575.42MHz, the GPS module does not broadcast a signal, and belongs to passive positioning, the GPS positioning module 21 calculates a pseudo distance with each satellite by calculating the pseudo distance with each satellite, and calculates four parameters of longitude, latitude, altitude and time correction of the receiver by using a distance intersection method, which is characterized by a fast point location speed but a large error; at least 4 satellites are needed for calculation in the primary positioning, which is called 3D positioning, and 2D positioning can be realized by 3 satellites, but the precision is poor; the GPS positioning module 21 continuously outputs positioning information and auxiliary information in an NMEA format through a serial communication port for a receiver to select and apply, and the GPS positioning module 21 can realize all-weather, continuous and real-time three-dimensional navigation positioning, speed measurement and high-precision precise positioning in a global range; preferably, the GPS positioning module 21 is of the model SKG 12A.
Specifically, the LBS location module 22 is a SIM card, and the location is realized by a base station network location technology through a mobile signal sent by the SIM card. Preferably, the base station network positioning technology is an existing, public and mature positioning technology based on trigonometric relation and operation.
Specifically, the LoRa communication module 4 adopts a linear modulation spread spectrum mode, so that the receiving sensitivity of the LoRa communication module can be obviously improved, a communication distance longer than that of other modulation technologies is realized, a base station is not required to be built in the LoRa technology, more equipment can be controlled by one gateway, the network distribution mode is flexible, and the construction cost can be greatly reduced; preferably, the LoRa communication module 4 is of the type LoRa 1278.
The wireless temperature acquisition equipment based on loRa technique that above-mentioned technical scheme provided for the real-time location and the temperature and humidity control of cold chain logistics transportation mainly include: compared with the prior art, the invention has the following advantages that:
(1) the characteristics of strong signal penetrability, long-distance transmission, low power consumption, multiple nodes, low cost and flexible network distribution mode of the LoRa technology are utilized, and the problems that independent monitoring of multiple temperature zones cannot be realized, the signal penetrability is weak, the transmission distance is short, and the transmitting intensity and the receiving sensitivity are not high in the prior art are solved;
(2) by adopting a GPS and LBS dual positioning mode, the problem that the positioning mode is single, and the positioning cannot be carried out when no GPS signal exists or the GPS signal is weak in the prior art is solved;
(3) by setting the local storage unit, the problems that blind-spot-free data supplementary transmission, data cannot be stored when a network or a server fails and the data reporting frequency is not adjustable in the prior art are solved.
As an embodiment of the present invention, referring to fig. 2, the main control unit 1 includes: the MCU controller U2, the inductor L1, the capacitors C14 and C15 and the resistor R14; the model of the MCU controller U2 is STM32L151, and the inductor L1 is an inductor with a magnetic core or an iron core; a pin 8 of the MCU controller U2 is sequentially connected with one end of a capacitor C15 and one end of a capacitor C14 and then grounded, the other end of the capacitor C14 is connected with the other end of a capacitor C15 and then connected with a pin 9 of the MCU controller U2, the pin 9 of the MCU controller U2 is also connected with one end of an inductor L1, the other end of the inductor L1 is connected with 3.3V of power supply voltage, a pin 20 of the MCU controller U2 is connected with one end of a resistor R14, the other end of the resistor R14 is grounded, a pin 23, a pin 35 and a pin 47 of the MCU controller U2 are respectively grounded, and a pin 1, a pin 24 and a pin 36 of the MCU controller U2 are respectively connected with 3.3V of power supply voltage;
pin 12, pin 13, pin 38, pin 39, pin 40, and pin 41 of the MCU controller U2 are used to connect to the LoRa communication module 4, so as to implement remote communication with the internet of things management platform 01 through the LoRa communication module 4, where pin 12 of the MCU controller U2 is RXD _ LoRa for receiving data transmitted by the LoRa communication module, pin 13 of the MCU controller U2 is TXD _ LoRa for sending data of the MCU controller U2 to the LoRa communication module 4, pin 39 of the MCU controller U2 is an enable terminal LoRa _ EN for triggering the LoRa communication module 4, pin 38 of the MCU controller U2 is an interface terminal AUX _ LoRa connected to the LoRa communication module 4, pin 40 of the MCU controller U2 is an interface terminal 1_ LoRa connected to the LoRa communication module 4, and pin 41 of the MCU controller U2 is an interface terminal 0_ LoRa connected to the LoRa communication module 4;
a pin 42 and a pin 43 of the MCU controller U2 are I2C buses and are used to connect the temperature and humidity sensor module 23, wherein the pin 42 of the MCU controller U2 is a control line SCL _ ST32 and is used to output a control signal to the temperature and humidity sensor module 23, and the pin 43 of the MCU controller U2 is a data line SDA _ ST32 and is used to receive environment temperature and humidity information transmitted by the temperature and humidity sensor module 23;
pin 3 and pin 4 of the MCU controller U2 are used to connect to the crystal oscillator unit 13, where pin 3 of the MCU controller U2 is a crystal oscillator signal input terminal OSC _ IN32, and pin 4 of the MCU controller U2 is a crystal oscillator signal input terminal OSC _ OUT 32;
a pin 34 and a pin 37 of the MCU controller U2 are used to connect the JLINK download interface 12, where the pin 34 of the MCU controller U2 is a hardware Debug interface Debug _ SWDIO, and the pin 37 of the MCU controller U2 is a hardware Debug interface Debug _ SWCLK;
a pin 33 of the MCU controller U2 is used to connect the detaching alarm unit 16, wherein the pin 33 of the MCU controller U2 is an alarm signal terminal KEY _ ALERT;
a pin 29 and a pin 32 of the MCU controller U2 are used to connect the indicator light unit 15, wherein the pin 29 of the MCU controller U2 is a RED light signal terminal LED _ RED, and the pin 32 of the MCU controller U2 is a BLUE light signal terminal LED _ BLUE;
a pin 14, a pin 15, a pin 16 and a pin 17 of the MCU controller U2 are used to connect the memory cell 11, wherein the pin 14 of the MCU controller U2 is a chip select signal terminal FLASH _ NSS, the pin 15 of the MCU controller U2 is a clock signal terminal FLASH _ CLK, the pin 16 of the MCU controller U2 is a data output terminal FLASH _ DOUT, and the pin 17 of the MCU controller U2 is a data input terminal FLASH _ DIN;
a pin 7 of the MCU controller U2 is used to connect the power-on reset unit 14, and the pin 7 of the MCU controller U2 is a reset terminal MCU _ RST;
a pin 25 of the MCU controller U2 is used to connect the lithium battery power supply module 31, wherein the pin 25 of the MCU controller U2 is a charging control terminal BAT _ CHG;
a pin 10 and a pin 10 of the MCU controller U2 are used for connecting a battery voltage detection unit 17, a pin 11 of the MCU controller U2 is also connected with a low power consumption management module 33, the pin 10 of the MCU controller U2 is a battery voltage sampling enable terminal ADC _ EN, and the pin 11 of the MCU controller U2 is a battery voltage sampling input terminal ADC _ BAT;
the MCU controller U2 is connected with the GPS positioning module 21 and the LBS positioning module 22 through serial ports arranged on the MCU controller U2 to exchange data.
Referring to fig. 3, as an embodiment of the present invention, a temperature/humidity sensor module 23 includes: a temperature and humidity sensor U4, resistors R3 and R4; the model of the temperature and humidity sensor U4 is SHT 30; pin 1 of temperature and humidity sensor U4 connects the one end of resistance R3, and the other end of resistance R3 connects data line SDA _ ST32, and pin 4 of temperature and humidity sensor U4 connects the one end of resistance R4, and the other end of resistance R4 connects control line SCL _ ST32, and pin 5 of temperature and humidity sensor U4 connects mains voltage 3.3V, and pin 7 and pin 8 of temperature and humidity sensor U4 connect the back ground connection.
Referring to fig. 4, a lithium battery power supply module 31 according to an embodiment of the present invention includes: a lithium battery charging management chip U18, a lithium battery interface X3, an external power interface X4, test points TP1, TP2, TP3, Schottky diodes TV6 and TV7, capacitors C49, C50, C51, C52, C53, C54, C65, C66, C68 and C69, an inductor L5, resistors R15, R19, R20, R25, R26, R27, R28, R29, R30, R31, R32, R93 and R94; the lithium battery charging management chip U18 is a model BQ25895, and is a highly integrated 5A switch mode battery charging management and system power supply path management device suitable for lithium ion batteries and lithium polymer batteries; the external power interface X4 is a Micro-USB;
pin 1 of the lithium battery charging management chip U18 is connected with one end of a capacitor C68, one end of a capacitor C69, a test point TP1 and pin 1 of an external power interface X1 in sequence, the other end of the capacitor C68 is connected with the other end of the capacitor C69 and then connected with an analog ground, pin 2 of the external power interface X1 is connected with the negative electrode of a schottky diode TV7, pin 3 of the external power interface X1 is connected with the negative electrode of the schottky diode TV6, the positive electrode of the schottky diode TV6 is connected with the positive electrode of a schottky diode TV7 and then connected with a ground, pin 5 of the external power interface X1 is connected with the analog ground, pin 2 of the lithium battery charging management chip U18 is connected with one end of a resistor R15, pin 3 of the lithium battery charging management chip U18 is connected with the other end of the resistor R15, pin 4 of the lithium battery charging management chip U18 is connected with one end of a resistor R29 and a charging control end 686 _ CHG respectively, pin 5 of the lithium battery charging management chip U18 is connected with one end of a resistor R28 and a resistor 25 respectively, the other end of the resistor R25 is connected with an M26 serial port control line, a pin 6 of a lithium battery charging management chip U18 is respectively connected with one end of a resistor R27 and one end of a resistor R19, the other end of the resistor R19 is connected with an M26 serial port data line, the other end of the resistor R29, the other end of the resistor R28 and the other end of a resistor R27 are connected and then connected with 2.8V, a pin 8 of the lithium battery charging management chip U18 is respectively connected with one end of a resistor R30 and a terminal OTG, the other end of the resistor R30 is grounded, a pin 9 of the lithium battery charging management chip U18 is connected with one end of the resistor R31, the other end of the resistor R31 is grounded, a pin 10 of the lithium battery charging management chip U18 is connected with one end of the resistor R32, a pin 11 of the lithium battery charging management chip U18 is respectively connected with one end of a resistor R26 and one end of a resistor R20, the other end of the resistor R26 is connected and then connected with the other end of the resistor R32, the other end of the resistor R20 is grounded, and the other end of the lithium battery charging management chip U18 is connected with a pin 22, a pin 13 and a pin 14 of a lithium battery charging management chip U18 are connected and then respectively connected with one end of a capacitor C53 and one end of a capacitor C54, the other end of the capacitor C53 is connected with the other end of a capacitor C54 and then connected with an analog ground, one end of a capacitor C54 is also connected with a test point TP3 and a pin 2 of a lithium battery interface X3, a pin 1 of the lithium battery interface X3 is connected with the analog ground, a pin 15 and a pin 16 of a lithium battery charging management chip U18 are connected and then respectively connected with one end of an inductor L5 and one end of a capacitor C65, a pin 17 and a pin 18 of the lithium battery charging management chip U18 are connected and then connected with the analog ground, a pin 19 and a pin 20 of the lithium battery charging management chip U18 are respectively connected with the other end of the inductor L5 and one end of the capacitor C51, the other end of the inductor L5 is also connected with one end of the capacitor C51, one end of the capacitor C65 is also connected with one end of a capacitor C66, the other end of the capacitor C65 is connected with the other end of the capacitor C66 and then connected with the ground, one end of the capacitor C66 is further connected to the test point TP2 and the voltage adjustment module 32, the pin 21 of the lithium battery charging management chip U18 is connected to one end of the resistor R94, the other end of the resistor R94 is connected to the other end of the capacitor C51, the pin 21 of the lithium battery charging management chip U18 is further connected to one end of the capacitor C50, the other end of the capacitor C50 is grounded, the pin 23 of the lithium battery charging management chip U18 is connected to one end of the capacitor C52 and one end of the capacitor C49, the other end of the capacitor C52 and the other end of the capacitor C49 are connected to the analog ground after being connected to each other, the pin 24 of the lithium battery charging management chip U18 is connected to one end of the resistor R93, and the other end of the resistor R93 is connected to the low-power-consumption management module 33.
Referring to fig. 5, the voltage adjustment module 32 according to an embodiment of the present invention includes: the voltage regulation circuit comprises a voltage regulation chip U5, capacitors C15 and C16 and a test point TP 4; the model of the voltage regulation chip U5 is XC6206P 302M; pin 3 of the voltage adjusting chip U5 is connected to one end of the capacitor C15 and the lithium battery power supply module 31, the other end of the capacitor C15 is connected to pin 1 of the voltage adjusting chip U5 and then grounded, pin 2 of the voltage adjusting chip U5 is connected to one end of the capacitor C16 and the test point TP4 in sequence and then connected to the low power management module 33, and the other end of the capacitor C16 is connected to pin 1 of the voltage adjusting chip U5 and then grounded.
Referring to fig. 6, the low power management module 33 according to an embodiment of the present invention includes: a mixed signal microcontroller chip U6, a download program interface J2, a crystal oscillator Y1, Schottky diodes TV2 and TV3, capacitors C17, C18, C19 and C20, resistors R6, R16, R17, R18, R23 and R24; the mixed signal microcontroller chip U6 is of model MSP430FR2433IRGE, and combines unique embedded FRAM with a comprehensive ultra-low power consumption system architecture, so that system designers can reduce energy consumption and improve performance at the same time; the download program interface J2 is used for externally connecting debugging equipment to download and update a control program of the mixed signal microcontroller chip U6;
pin 1 of the mixed signal microcontroller chip U6 is connected with one end of a resistor R16 and one end of a resistor R18 respectively, the other end of the resistor R16 is connected with one end of a capacitor C18 and one end of a capacitor C17 in sequence and then is connected with pin 24 of a mixed signal microcontroller chip U6, pin 2 of the mixed signal microcontroller chip U6 is connected with one end of a resistor R17, the other end of the resistor R17 is connected with the cathode of a Schottky diode TV2 and pin 1 of a download program interface J2 respectively, the other end of the resistor R18 is connected with the cathode of the Schottky diode TV3 and pin 2 of the download program interface J2 respectively, the anode of the Schottky diode TV2 is connected with the anode of the Schottky diode TV3 and then is grounded, pin 3 of the download program interface J2 is grounded, pin 3 of the mixed signal microcontroller chip U6 is connected with one end of a resistor R24, the other end of the resistor R24 is connected with one end of a resistor R22 and a M26 serial port data receiving end, the other end of the resistor R22 is grounded, a pin 4 of the mixed signal microcontroller chip U6 is connected with one end of a resistor R23, the other end of the resistor R23 is connected with an M26 serial data transmitting end, a pin 7 of the mixed signal microcontroller chip U6 is connected with one end of a resistor R6, the other end of the resistor R6 is connected with a battery voltage sampling input terminal ADC _ BAT, a pin 21 of the mixed signal microcontroller chip U6 is respectively connected with one end of a crystal oscillator Y1 and one end of a capacitor C20, a pin 22 of the mixed signal microcontroller chip U6 is respectively connected with the other end of the crystal oscillator Y1 and one end of a capacitor C19, the other end of the capacitor C19 is connected with the other end of the capacitor C20 and then grounded, and a pin 23 of the mixed signal microcontroller chip U6 is sequentially connected with the other end of the capacitor C17 and the other end of the capacitor C18 and then grounded.
As an embodiment of the present invention, referring to fig. 7, the memory cell 11 includes a memory chip U1, a capacitor C1, and a resistor R18; the model of the storage chip U1 is W25Q64 FVSIG, which is an 8M byte Flash chip; pin 6 of the memory chip U1 is connected with a clock signal terminal FLASH _ CLK, pin 5 of the memory chip U1 is connected with a data input terminal FLASH _ DIN, pin 2 of the memory chip U1 is connected with a data output terminal FLASH _ DOUT, pin 1 of the memory chip U1 is connected with a chip selection signal terminal FLASH _ NSS, pin 4 of the memory chip U1 is grounded, pin 7 and pin 3 of the memory chip U1 are connected with one end of a resistor R18, pin 8 of the memory chip U1 is connected with the other end of the resistor R18 and one end of a capacitor C1 respectively, the other end of the capacitor C1 is grounded, and pin 8 of the memory chip U1 is also connected with a power supply voltage of 3.3V.
Referring to fig. 8, the removal alarm unit 16 includes an inductor interface P1 and a resistor R16, the inductor interface P1 is configured to connect an external inductor and send an inductor signal to a warning signal terminal KEY _ ALERT, a pin 3 and a pin 4 of the inductor interface P1 are connected and then grounded, a pin 1 and a pin 2 of the inductor interface P1 are connected and then respectively connected to one end of a resistor R16 and the warning signal terminal KEY _ ALERT, and the other end of the resistor R16 is connected to a power supply voltage of 3.3V.
Referring to fig. 9, the power-on reset unit 14 includes a reset interface J3, a resistor R12, and a capacitor C13, the reset interface J3 is used to access a reset button, a pin 2 of the reset interface J3 is grounded, a pin 1 of the reset interface J3 is connected to one end of a resistor R12 and one end of a capacitor C13, one end of the capacitor C13 is further connected to a reset terminal MCU _ RST, the other end of the capacitor C13 is grounded, and the other end of the resistor R12 is connected to a power voltage of 3.3V.
Referring to fig. 10, the JLINK download interface 12 includes a download program interface J1, a download program interface J1 is used for connecting an external debugging device to download and update a control program of the MCU controller U2, pin 4 of the download program interface J1 is grounded, pin 3 of the download program interface J1 is connected to the hardware Debug interface Debug _ SWCLK, pin 2 of the download program interface J1 is connected to the hardware Debug interface Debug _ SWDIO, and pin 1 of the download program interface J1 is connected to a power supply voltage of 3.3V.
Referring to fig. 11, as an embodiment of the present invention, a crystal oscillator unit 13 includes: a crystal oscillator Y2, capacitors C10 and C12; one end of the crystal oscillator Y2 is connected to one end of the capacitor C10 and the crystal oscillator signal input terminal OSC _ IN32, and the other end of the crystal oscillator Y2 is connected to one end of the capacitor C12 and the crystal oscillator signal input terminal OSC _ OUT 32.
Referring to fig. 12, an indicator lamp unit 15 according to an embodiment of the present invention includes: light emitting diodes HL1 and HL2, resistors R9 and R13; the light emitting diode HL1 emits BLUE light, the light emitting diode HL2 emits RED light, the anode of the light emitting diode HL1 is connected with a BLUE light signal end LED _ BLUE, the cathode of the light emitting diode HL1 is connected with one end of a resistor R13, the other end of the resistor R13 is connected with a terminal GND, the anode of the light emitting diode HL2 is connected with a RED light signal end LED _ RED, the cathode of the light emitting diode HL2 is connected with one end of a resistor R9, and the other end of the resistor R9 is connected with the terminal GND.
Referring to fig. 13, the battery voltage detection unit 17 includes resistors R6 and R7, one end of the resistor R6 is connected to the battery voltage VBAT, the other end of the resistor R6 is connected to the battery voltage sampling input terminal ADC _ BAT and one end of the resistor R7, and the other end of the resistor R7 is connected to the battery voltage sampling enable terminal ADC _ EN.
In the transportation process, the internet of things management platform 01 is used for monitoring the specific temperature and humidity of the equipment:
step 1: after the equipment is successfully installed, the installation position of the equipment, namely the initial position of the equipment, is obtained through the GPS positioning module 21 and the LBS positioning module 22, and then the installation position of the equipment is reported to the Internet of things management platform 01 through the LoRa communication module 4;
step 2: the GPS positioning module 21 and the LBS positioning module 22 are used for acquiring the position information of the equipment in real time;
and step 3: temperature and humidity data of the equipment are collected in real time through a temperature and humidity sensor module 23;
and 4, step 4: the main control unit 1 judges whether the temperature and humidity data are within a preset threshold range, if the temperature and humidity data exceed the threshold, the temperature and humidity alarm is immediately transmitted to the internet of things management platform 01 through the LoRa communication module 4, then the internet of things management platform 01 reports the temperature and humidity alarm to a remote platform through a network, otherwise, the temperature and humidity data are temporarily stored in a local storage unit 11, and the equipment is waited to be transmitted to the internet of things management platform 01 through the LoRa communication module 4 at regular time;
and 5: the main control unit 1 stores the position information collected by the GPS positioning module 21 and the LBS positioning module 22, the temperature and humidity data collected by the temperature and humidity sensor module 23 and the battery power information collected by the battery voltage detection unit 17 in the storage unit 11, waits for the equipment to transmit the information to the Internet of things management platform 01 through the LoRa communication module 4 at regular time, and reports the information to the remote platform through the Internet of things management platform 01.
The embodiments of the present invention have been described in detail, but the invention is not limited to the embodiments, and those skilled in the art can make many equivalent modifications or substitutions without departing from the spirit of the present invention, and the equivalents or substitutions are included in the scope of protection defined by the claims of the present application.

Claims (10)

1. The utility model provides a wireless temperature acquisition equipment based on loRa technique which characterized in that for the real-time location and the temperature and humidity control of cold chain logistics transportation, include:
the system comprises a GPS positioning module, an LBS positioning module, a temperature and humidity sensor module and a main control unit, wherein the GPS positioning module is used for converting received global positioning system signals into GPS position information and transmitting the GPS position information to the main control unit, the LBS positioning module is used for converting signals obtained through a three-base-station positioning mode into LBS position information and transmitting the LBS position information to the main control unit, and the temperature and humidity sensor module is used for transmitting environment temperature and humidity information acquired in real time to the main control unit;
the LoRa communication module is used for uploading the GPS position information, the LBS position information and the environment temperature and humidity information which are processed and analyzed by the main control unit to an Internet of things management platform;
the lithium battery management system comprises a lithium battery power supply module, a voltage adjusting module and a low-power-consumption management module, wherein the lithium battery power supply module is used for charging and discharging management of a lithium battery, the voltage adjusting module is used for adjusting the voltage output by the lithium battery power supply module into a stable working voltage and then providing a working power supply for the main control unit and the LoRa communication module through the low-power-consumption management module, and the low-power-consumption management module is used for realizing low power consumption of the main control unit and the LoRa communication module so as to prolong the endurance time of the lithium battery;
the detaching alarm unit sends an obtained detaching signal to the main control unit through an external sensor so that the main control unit sends detaching alarm information to the Internet of things management platform through the LoRa communication module;
the storage unit is used for storing the processing data of the main control unit;
a JLINK download interface for downloading and updating the control program of the main control unit;
the crystal oscillator unit is used for generating a clock frequency signal necessary for the main control unit to execute the instruction;
the power-on reset unit is used for providing a reset function for the main control unit;
the indicating lamp unit is used for displaying whether the working state of the main control unit is normal or not;
the battery voltage detection unit is used for detecting whether the voltage of the lithium battery is in a normal range or not, if the voltage of the lithium battery is lower than the normal range, the main control unit sends out charging assignment to the lithium battery power supply module, and if the voltage of the lithium battery is higher than the normal range, the main control unit sends out charging stop assignment to the lithium battery power supply module;
the main control unit respectively with GPS orientation module LBS orientation module temperature and humidity sensor module LoRa communication module the pilot lamp unit demolish alarm unit power-on reset unit crystal oscillator unit JLINK downloads the interface the storage unit battery voltage detecting element lithium cell power module and low power consumption management module electrical property links to each other, low power consumption management module still with LoRa communication module electrical property links to each other, lithium cell power module still respectively with voltage adjustment module with low power consumption management module electrical property links to each other, voltage adjustment module still with low power consumption management module electrical property links to each other.
2. The device of claim 1, wherein the main control unit comprises: the MCU controller U2, the inductor L1, the capacitors C14 and C15 and the resistor R14; the inductor L1 is an inductor with a magnetic core or an iron core; a pin 8 of the MCU controller U2 is sequentially connected to one end of the capacitor C15 and one end of the capacitor C14 and then grounded, the other end of the capacitor C14 is connected to the other end of the capacitor C15 and then connected to a pin 9 of the MCU controller U2, the pin 9 of the MCU controller U2 is further connected to one end of the inductor L1, the other end of the inductor L1 is connected to a power supply voltage of 3.3V, a pin 20 of the MCU controller U2 is connected to one end of the resistor R14, the other end of the resistor R14 is grounded, a pin 23, a pin 35 and a pin 47 of the MCU controller U2 are respectively grounded, and a pin 1, a pin 24 and a pin 36 of the MCU controller U2 are respectively connected to the power supply voltage of 3.3V;
the pin 12, the pin 13, the pin 38, the pin 39, the pin 40 and the pin 41 of the MCU controller U2 are used to connect with the LoRa communication module, so as to realize remote communication with the internet of things management platform through the LoRa communication module, wherein, the pin 12 of the MCU controller U2 is RXD _ LORA for receiving the data transmitted by the LORA signaling module, pin 13 of the MCU controller U2 is TXD _ LORA for transmitting data of the MCU controller U2 to the LORA communication module, the pin 39 of the MCU controller U2 is an enable terminal LoRa _ EN that triggers the LoRa communication module, the pin 38 of the MCU controller U2 is an interface terminal AUX _ LoRa connected to the LoRa communication module, the pin 40 of the MCU controller U2 is an interface MD1_ LoRa connected to the LoRa communication module, a pin 41 of the MCU controller U2 is an interface end MD0_ LoRa connected to the LoRa communication module;
a pin 42 and a pin 43 of the MCU controller U2 are I2C buses and are used to connect the temperature and humidity sensor module, wherein the pin 42 of the MCU controller U2 is a control line SCL _ ST32 and is used to output a control signal to the temperature and humidity sensor module, and the pin 43 of the MCU controller U2 is a data line SDA _ ST32 and is used to receive the environment temperature and humidity information transmitted by the temperature and humidity sensor module;
a pin 3 and a pin 4 of the MCU controller U2 are used to connect the crystal oscillator unit, where the pin 3 of the MCU controller U2 is a crystal oscillator signal input terminal OSC _ IN32, and the pin 4 of the MCU controller U2 is a crystal oscillator signal input terminal OSC _ OUT 32;
the pin 34 and the pin 37 of the MCU controller U2 are used to connect the JLINK download interface, wherein the pin 34 of the MCU controller U2 is a hardware Debug interface Debug _ SWDIO, and the pin 37 of the MCU controller U2 is a hardware Debug interface Debug _ SWCLK;
a pin 33 of the MCU controller U2 is used for connecting the dismounting alarm unit, wherein the pin 33 of the MCU controller U2 is an alarm signal terminal KEY _ ALERT;
a pin 29 and a pin 32 of the MCU controller U2 are used to connect the indicator light units, wherein the pin 29 of the MCU controller U2 is a RED light signal terminal LED _ RED, and the pin 32 of the MCU controller U2 is a BLUE light signal terminal LED _ BLUE;
a pin 14, a pin 15, a pin 16, and a pin 17 of the MCU controller U2 are used to connect the memory unit, wherein the pin 14 of the MCU controller U2 is a chip select signal terminal FLASH _ NSS, the pin 15 of the MCU controller U2 is a clock signal terminal FLASH _ CLK, the pin 16 of the MCU controller U2 is a data output terminal FLASH _ DOUT, and the pin 17 of the MCU controller U2 is a data input terminal FLASH _ DIN;
a pin 7 of the MCU controller U2 is used to connect the power-on reset unit, and the pin 7 of the MCU controller U2 is a reset terminal MCU _ RST;
a pin 25 of the MCU controller U2 is used for connecting the lithium battery power supply module, wherein the pin 25 of the MCU controller U2 is a charging control terminal BAT _ CHG;
a pin 10 and a pin 10 of the MCU controller U2 are used to connect the battery voltage detection unit, a pin 11 of the MCU controller U2 is further connected to the low power consumption management module, the pin 10 of the MCU controller U2 is a battery voltage sampling enable terminal ADC _ EN, and the pin 11 of the MCU controller U2 is a battery voltage sampling input terminal ADC _ BAT;
the MCU controller U2 is connected with the GPS positioning module and the LBS positioning module through serial ports arranged in the MCU controller U2 to exchange data.
3. The wireless temperature acquisition device based on the LoRa technology of claim 2, wherein the temperature and humidity sensor module comprises: a temperature and humidity sensor U4, resistors R3 and R4; the model of the temperature and humidity sensor U4 is SHT 30; pin 1 of temperature and humidity sensor U4 connects the one end of resistance R3, the other end of resistance R3 is connected data line SDA _ ST32, pin 4 of temperature and humidity sensor U4 connects the one end of resistance R4, the other end of resistance R4 is connected control line SCL _ ST32, pin 5 of temperature and humidity sensor U4 connects mains voltage 3.3V, pin 7 and pin 8 of temperature and humidity sensor U4 link to each other the back ground connection.
4. The wireless temperature acquisition device based on the LoRa technology as claimed in claim 2, wherein the lithium battery power supply module comprises: a lithium battery charging management chip U18, a lithium battery interface X3, an external power interface X4, test points TP1, TP2, TP3, Schottky diodes TV6 and TV7, capacitors C49, C50, C51, C52, C53, C54, C65, C66, C68 and C69, an inductor L5, resistors R15, R19, R20, R25, R26, R27, R28, R29, R30, R31, R32, R93 and R94;
pin 1 of the lithium battery charging management chip U18 is sequentially connected to one end of the capacitor C68, one end of the capacitor C69, the test point TP1, and pin 1 of the external power interface X1, the other end of the capacitor C68 is connected to the other end of the capacitor C69 and then connected to analog ground, pin 2 of the external power interface X1 is connected to the negative electrode of the schottky diode TV7, pin 3 of the external power interface X1 is connected to the negative electrode of the schottky diode TV6, the positive electrode of the schottky diode TV6 is connected to the positive electrode of the schottky diode TV7 and then connected to ground, pin 5 of the external power interface X1 is connected to analog ground, pin 2 of the lithium battery charging management chip U18 is connected to one end of the resistor R15, pin 3 of the lithium battery charging management chip U18 is connected to the other end of the resistor R15, and pin 4 of the lithium battery charging management chip U18 is respectively connected to one end of the resistor R29 and the charging control terminal CHG _ BAT, a pin 5 of the lithium battery charging management chip U18 is connected to one end of the resistor R28 and one end of the resistor R25, respectively, the other end of the resistor R25 is connected to an M26 serial port control line, a pin 6 of the lithium battery charging management chip U18 is connected to one end of the resistor R27 and one end of the resistor R19, the other end of the resistor R19 is connected to an M26 serial port data line, the other end of the resistor R29, the other end of the resistor R28 and the other end of the resistor R27 are connected to 2.8V, a pin 8 of the lithium battery charging management chip U18 is connected to one end of the resistor R30 and the terminal OTG, respectively, the other end of the resistor R30 is grounded, a pin 9 of the lithium battery charging management chip U18 is connected to one end of the resistor R31, the other end of the resistor R31 is grounded, a pin 10 of the lithium battery charging management chip U18 is connected to one end of the resistor R32, a pin 11 of the lithium battery charging management chip U18 is connected to one end of the resistor R26 and one end of the resistor R20, respectively, the other end of the resistor R26 is connected to the other end of the resistor R32 and then grounded, the other end of the resistor R20 is connected to a pin 22 of the lithium battery charging management chip U18, a pin 13 and a pin 14 of the lithium battery charging management chip U18 are connected to one end of the capacitor C53 and one end of the capacitor C54, respectively, the other end of the capacitor C53 and the other end of the capacitor C54 are connected to an analog ground, one end of the capacitor C54 is further connected to a pin 2 of the test point TP3 and the lithium battery interface X3, a pin 1 of the lithium battery interface X3 is connected to the analog ground, a pin 15 and a pin 16 of the lithium battery charging management chip U18 are connected to one end of the inductor L5 and one end of the capacitor C65, a pin 17 and a pin 18 of the lithium battery charging management chip U18 are connected and then connected to a simulated ground, a pin 19 and a pin 20 of the lithium battery charging management chip U18 are connected and then connected to the other end of the inductor L5 and one end of the capacitor C51, the other end of the inductor L5 is further connected to one end of the capacitor C51, one end of the capacitor C65 is further connected to one end of the capacitor C66, the other end of the capacitor C65 is connected to the other end of the capacitor C66 and then connected to the ground, one end of the capacitor C66 is further connected to the test point TP2 and the voltage adjustment module, a pin 21 of the lithium battery charging management chip U18 is connected to one end of the resistor R94, the other end of the resistor R94 is connected to the other end of the capacitor C51, a pin 21 of the lithium battery charging management chip U18 is further connected to one end of the capacitor C50, and the other end of the capacitor C50 is connected to the ground, the pin 23 of the lithium battery charging management chip U18 is respectively connected with one end of the capacitor C52 and one end of the capacitor C49, the other end of the capacitor C52 is connected with the other end of the capacitor C49 and then connected with a simulation ground, the pin 24 of the lithium battery charging management chip U18 is connected with one end of the resistor R93, and the other end of the resistor R93 is connected with the low-power management module.
5. The LoRa technology-based wireless temperature acquisition device according to claim 4, wherein the voltage adjustment module comprises: the voltage regulation circuit comprises a voltage regulation chip U5, capacitors C15 and C16 and a test point TP 4; the pin 3 of the voltage adjusting chip U5 is respectively connected with one end of the capacitor C15 and the lithium battery power supply module, the other end of the capacitor C15 is connected with the pin 1 of the voltage adjusting chip U5 and then grounded, the pin 2 of the voltage adjusting chip U5 is sequentially connected with one end of the capacitor C16 and the test point TP4 and then connected with the low-power-consumption management module, and the other end of the capacitor C16 is connected with the pin 1 of the voltage adjusting chip U5 and then grounded.
6. The wireless temperature acquisition device based on LoRa technology of claim 5, characterized in that, the low power consumption management module includes: a mixed signal microcontroller chip U6, a download program interface J2, a crystal oscillator Y1, Schottky diodes TV2 and TV3, capacitors C17, C18, C19 and C20, resistors R6, R16, R17, R18, R23 and R24; the download program interface J2 is used for connecting a debugging device externally to download and update the control program of the mixed signal microcontroller chip U6;
pin 1 of the mixed signal microcontroller chip U6 is connected to one end of the resistor R16 and one end of the resistor R18, the other end of the resistor R16 is connected to one end of the capacitor C18 and one end of the capacitor C17 in sequence and then is connected to pin 24 of the mixed signal microcontroller chip U6, pin 2 of the mixed signal microcontroller chip U6 is connected to one end of the resistor R17, the other end of the resistor R17 is connected to the cathode of the schottky diode TV2 and pin 1 of the download program interface J2, the other end of the resistor R18 is connected to the cathode of the schottky diode TV3 and pin 2 of the download program interface J2, the anode of the schottky diode TV2 is connected to the anode of the schottky diode TV3 and then is grounded, pin 3 of the download program interface J2 is grounded, pin 3 of the mixed signal microcontroller chip U6 is connected to one end of the resistor R24, the other end of the resistor R24 is connected to one end of the resistor R22 and an M26 serial data receiving end respectively, the other end of the resistor R22 is grounded, the pin 4 of the mixed signal microcontroller chip U6 is connected to one end of the resistor R23, the other end of the resistor R23 is connected to an M26 serial data transmitting end, the pin 7 of the mixed signal microcontroller chip U6 is connected to one end of the resistor R6, the other end of the resistor R6 is connected to the battery voltage sampling input terminal ADC _ BAT, the pin 21 of the mixed signal microcontroller chip U6 is connected to one end of the crystal oscillator Y1 and one end of the capacitor C20 respectively, the pin 22 of the mixed signal microcontroller chip U6 is connected to the other end of the crystal oscillator Y1 and one end of the capacitor C19 respectively, the other end of the capacitor C19 is connected to the other end of the capacitor C20 and then grounded, and the pin 23 of the mixed signal microcontroller chip U6 is connected to the other end of the capacitor C17 and the other end of the capacitor C18 in sequence And then grounded.
7. The wireless temperature acquisition equipment based on the LoRa technology is characterized in that the storage unit comprises a storage chip U1, a capacitor C1 and a resistor R18; a pin 6 of the memory chip U1 is connected to the clock signal terminal FLASH _ CLK, a pin 5 of the memory chip U1 is connected to the data input terminal FLASH _ DIN, a pin 2 of the memory chip U1 is connected to the data output terminal FLASH _ DOUT, a pin 1 of the memory chip U1 is connected to the chip select signal terminal FLASH _ NSS, a pin 4 of the memory chip U1 is grounded, a pin 7 and a pin 3 of the memory chip U1 are connected to one end of the resistor R18 after being connected to each other, a pin 8 of the memory chip U1 is connected to the other end of the resistor R18 and one end of the capacitor C1, the other end of the capacitor C1 is grounded, and a pin 8 of the memory chip U1 is also connected to a power supply voltage of 3.3V.
8. The LoRa technology-based wireless temperature acquisition device according to claim 2, wherein the removal alarm unit comprises an inductor interface P1 and a resistor R16, the inductor interface P1 is used for externally connecting an inductor and sending an inductor signal to the warning signal terminal KEY _ ALERT, a pin 3 and a pin 4 of the inductor interface P1 are connected and then grounded, a pin 1 and a pin 2 of the inductor interface P1 are connected and then respectively connected with one end of the resistor R16 and the warning signal terminal KEY _ ALERT, and the other end of the resistor R16 is connected with a power supply voltage of 3.3V.
9. The LoRa-technology-based wireless temperature acquisition device according to claim 2, wherein the power-on reset unit comprises a reset interface J3, a resistor R12 and a capacitor C13, the reset interface J3 is used for accessing a reset button, a pin 2 of the reset interface J3 is grounded, a pin 1 of the reset interface J3 is respectively connected with one end of the resistor R12 and one end of the capacitor C13, one end of the capacitor C13 is further connected with the reset terminal MCU _ RST, the other end of the capacitor C13 is grounded, and the other end of the resistor R12 is connected with a power supply voltage of 3.3V;
the JLINK download interface comprises a download program interface J1, the download program interface J1 is used for externally connecting debugging equipment to download and update the control program of the MCU controller U2, pin 4 of the download program interface J1 is grounded, pin 3 of the download program interface J1 is connected with the hardware debugging interface Debug _ SWCLK, pin 2 of the download program interface J1 is connected with the hardware debugging interface Debug _ SWDIO, and pin 1 of the download program interface J1 is connected with the power supply voltage 3.3V.
10. The wireless temperature acquisition device based on the LoRa technology as claimed in claim 2, wherein the crystal oscillator unit comprises: a crystal oscillator Y2, capacitors C10 and C12; one end of the crystal oscillator Y2 is connected to one end of the capacitor C10 and the crystal oscillator signal input terminal OSC _ IN32, and the other end of the crystal oscillator Y2 is connected to one end of the capacitor C12 and the crystal oscillator signal input terminal OSC _ OUT 32;
the indicator light unit includes: light emitting diodes HL1 and HL2, resistors R9 and R13; the light emitting diode HL1 emits BLUE light, the light emitting diode HL2 emits RED light, the anode of the light emitting diode HL1 is connected with the BLUE light signal end LED _ BLUE, the cathode of the light emitting diode HL1 is connected with one end of the resistor R13, the other end of the resistor R13 is connected with a terminal GND, the anode of the light emitting diode HL2 is connected with the RED light signal end LED _ RED, the cathode of the light emitting diode HL2 is connected with one end of the resistor R9, and the other end of the resistor R9 is connected with the terminal GND;
the battery voltage detection unit comprises resistors R6 and R7, one end of the resistor R6 is connected with the battery voltage VBAT, the other end of the resistor R6 is connected with the battery voltage sampling input end ADC _ BAT and one end of the resistor R7 respectively, and the other end of the resistor R7 is connected with the battery voltage sampling enable end ADC _ EN.
CN202110944999.5A 2021-08-17 2021-08-17 Wireless temperature acquisition equipment based on LoRa technique Pending CN113532545A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110944999.5A CN113532545A (en) 2021-08-17 2021-08-17 Wireless temperature acquisition equipment based on LoRa technique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110944999.5A CN113532545A (en) 2021-08-17 2021-08-17 Wireless temperature acquisition equipment based on LoRa technique

Publications (1)

Publication Number Publication Date
CN113532545A true CN113532545A (en) 2021-10-22

Family

ID=78122480

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110944999.5A Pending CN113532545A (en) 2021-08-17 2021-08-17 Wireless temperature acquisition equipment based on LoRa technique

Country Status (1)

Country Link
CN (1) CN113532545A (en)

Similar Documents

Publication Publication Date Title
US11959750B2 (en) Mobile transceiver with adaptive monitoring and reporting
US11778414B2 (en) Tool tracking system
US10764823B2 (en) Method and mobile transceiver having advanced network selection
US20200322886A1 (en) Method and mobile transceiver for asset tracking
CN104527580A (en) Intelligent positioning and tracking system for electric vehicle
CN107295457A (en) A kind of room point antenna feeder monitoring and localization method, system
EP3482227A1 (en) Mobile transceiver for asset tracking having a power saving scheme for network access
CN105843089A (en) Method of controlling vehicle terminal
US20170338872A1 (en) Method for operating a mobile transceiver
CN105338709A (en) Intelligent beacon light remote controlling and remote measuring system
CN101986765A (en) Singlechip-based low-power consumption networking positioning instrument
CN110007323A (en) A kind of intelligent interaction positioning system and its localization method
CN209947062U (en) Anti-loss tracking system
CN215573108U (en) Wireless temperature acquisition equipment based on LoRa technique
CN203386347U (en) Portable intelligent emergency communication device for environmental monitoring
CN113532545A (en) Wireless temperature acquisition equipment based on LoRa technique
CN210051898U (en) Intelligent interactive positioning system
CN218830652U (en) Fire control monitoring device based on loRa technique and internet of things
CN216900938U (en) Mobile tracking device based on NB-IoT and AGPS technologies
CN220123078U (en) Low-power consumption field data acquisition system device with node positioning function
US20230341500A1 (en) Tool tracking system
US11879987B2 (en) Tool tracking device with multiple and application settable beacon transmission rates
CN212258945U (en) Internet of things receiver
CN113543062A (en) Portable temperature monitoring equipment for information management platform of Internet of things
Manuel et al. FIEE Smart Campus IoT real-time bus tracking system and web app using LoRaWAN

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination