CN110426134A - A kind of temperature real-time acquisition device - Google Patents

Abstract

The invention belongs to the technical field of temperature measurement, and discloses a temperature real-time acquisition device, which is provided with a temperature measuring device, each temperature measuring device is connected with a temperature measuring cable, and the temperature measuring cable contains a plurality of temperature measuring points, and each temperature measuring point is equipped with a A digital temperature sensor; each temperature detector is connected to a repeater through a wireless signal, the repeater is located outside the granary, the repeater is connected to a concentrator through a wireless signal, and the concentrator is connected to a main control computer through a data bus. The invention automatically reads the temperature and measuring point position data of the temperature measuring cable through the temperature measuring device, and sends the temperature and measuring point data to the repeater through wireless methods such as LORA, and each temperature measuring device supports a maximum of 32 temperature measuring points. The temperature measurement cable, using the advanced wireless spread spectrum communication technology and sensor technology in today's Internet of Things technology, realizes the remote automatic measurement, collection, data statistics and analysis of the temperature parameters of the granary; compared with the traditional manual measurement method, it greatly improves the temperature measurement. efficiency and temperature measurement accuracy.

Description

A temperature real-time acquisition device

technical field

The invention belongs to the technical field of temperature and humidity measurement, in particular to a real-time temperature acquisition device.

Background technique

Grain temperature and humidity are one of the important indicators to ensure the safe storage of grain. Only by timely and accurately measuring the temperature and humidity data at all levels of the grain pile, and analyzing the grain storage situation based on the detected temperature data, make decisions and take measures , in order to minimize the loss of grain during storage.

my country is a large country with a large population. Scientific grain storage is a major event to ensure people's food supply and promote social stability. The monitoring of granary temperature plays an important role in scientific grain storage. In most grain storage enterprises, it is still mainly relying on manual detection of the temperature of the granary. Due to the large area of the grain depot, scattered granaries, many temperature test points in the warehouse, and complicated wiring, the manual monitoring workload is large, the efficiency is low, the detection cycle is long, and it is easy to miss detection. Moreover, the damage rate of the measurement devices is high, and the test accuracy is difficult to guarantee. , The detection and alarm are not timely, resulting in the loss of stored grain from time to time.

Moreover, the existing technology uses electronic temperature measuring components such as thermistors as the basis. Each temperature measuring point needs to be manually measured or corresponds to a communication line. The data is output in real time in the form of an analog signal, which cannot be stored or displayed, and there are few detection items. ;The existing system mainly detects temperature and humidity, and cannot expand to measure other data, such as CO ₂ gas concentration, pest density, air pressure, etc.; and a small number of wireless monitoring methods are used. Due to the short transmission distance, remote granaries that lack wireless communication facilities cannot Use, only traditional wired methods can be used.

In summary, the problems in the prior art are:

(1) Manually monitoring the temperature of the granary has a large workload and a long detection cycle, which is easy to miss; due to the untimely detection and alarm, the phenomenon of grain loss in the warehouse occurs from time to time;

(2) The degree of intelligence is low, the monitoring data can only be uploaded by cable, the monitoring data cannot be stored, or the amount of stored data is limited, and the data cannot be fully utilized for analysis and early warning;

(3) Wiring is complicated. The wiring of the whole granary is complicated, the cost is high, and the upgrade is difficult. The existing wireless monitoring method has a short transmission distance, which is not suitable for granaries in remote areas, and only traditional wired methods can be used.

(4) There are few detection items. The existing system mainly focuses on temperature and humidity, and cannot expand to measure other data, such as CO ₂ gas concentration, pest density, air pressure, etc.

Contents of the invention

Aiming at the problems existing in the prior art, the present invention provides a temperature real-time acquisition device;

Technical scheme of the present invention is as follows

A temperature real-time acquisition device, including a temperature detector, the temperature detector is connected to a temperature measurement cable, the temperature measurement cable contains N temperature measurement points, and each temperature measurement point is equipped with a digital temperature sensor; the N temperature detectors are connected through wireless signals A repeater, N repeaters are connected to the concentrator through wireless signals, and N concentrators are connected to the main control computer through a data bus; the number of N is: 1≤N≤120.

The distance between each digital temperature sensor and the digital temperature sensor is 0.5m to 2m, and they are connected to each other in parallel.

The outside of the thermometer is a waterproof box, and the lower end of the waterproof box is embedded with a waterproof connector; the inside of the thermometer is fixed with an interconnected control circuit board, battery, chip and built-in antenna, and the inside of the thermometer is filled with a sealing layer; temperature measurement The cables are connected to the control circuit board through waterproof connectors.

The outside of the repeater is a waterproof aluminum casing, and the side of the waterproof aluminum casing is embedded with a power switch, a power adapter socket and a metal waterproof connector; inside the repeater is fixed a interconnected repeater main board, battery and first antenna extension cable; An antenna is connected to the extension cable of the first antenna through a metal waterproof connector; a power switch and a power adapter are respectively electrically connected to the main board of the repeater, and a temperature and humidity display in the warehouse is connected to the repeater.

The outside of the concentrator is an ABS shell, the upper end of the ABS shell is embedded with a second antenna extension line, the lower end of the ABS shell is connected to the power cable through a waterproof connector, and the concentrator is fixed inside the concentrator with a concentrator main board and a battery connected to each other; the second antenna extension line is connected to the inner Connect the main board of the concentrator, and connect the omnidirectional fiberglass antenna to the outside; a temperature and humidity display outside the warehouse is connected to the concentrator.

Further, an edge server is provided between the concentrator and the main control computer, and the edge server is respectively connected to the concentrator and the main control computer through a data bus.

Further, the wireless signal connection is a connection based on LORA wireless communication technology.

Further, each temperature measuring device is connected with a temperature measuring cable, and each temperature measuring cable contains 1-32 temperature measuring points, and each temperature measuring point is equipped with a digital temperature sensor; 1-120 temperature measuring devices are wirelessly The signal is connected to the repeater, 1-60 repeaters are connected to the concentrator through wireless signals, and 1-20 concentrators are connected to the main control computer through the data bus.

Because the edge server is implanted between the concentrator and the main control computer, while realizing the long-distance wireless upload of monitoring data such as the temperature and humidity of the granary, at the same time, it performs pre-data preprocessing on a large number of terminal collection data, which greatly reduces the number of massive IoT terminals. Data from device to cloud platform.

The digital temperature sensor uses a digital temperature sensor of the DS18B20 model of the Dallas Company of the United States.

Main features of DS18B20 model digital temperature sensor

(1) Adapt to a wider voltage range: 3.0-5.5V

(2) Unique single-line interface mode, when DS18B20 is connected with the microprocessor, only one port line is needed to realize the two-way communication between the microprocessor and DS18B20

(3) DS18B20 supports multi-point networking function, and multiple DS18B20 can be connected in parallel on the only three wires to realize multi-point temperature measurement in networking

(4) DS18B20 does not require any peripheral components in use, and all sensing components and conversion circuits are integrated in an integrated circuit shaped like a triode

(5) The temperature range is -55°C to +125°C, and the accuracy is ±0.5°C at -10°C to +85°C

(6) The programmable resolution is 9 to 12 bits, and the corresponding distinguishable temperatures are 0.5°C, 0.25°C, 0.125°C and 0.0625°C, which can realize high-precision temperature measurement

(7) The measurement result directly outputs the digital temperature signal, which is serially transmitted to the CPU with a "one-line bus", and can transmit the CRC check code at the same time, which has strong anti-interference and error correction capabilities

(8) The price is cheap, and the wholesale price is only about 10 yuan

LORA wireless standard introduction:

LORA is a low-power local area network wireless standard created by semtech. The name of LORA is Long Range Radio. Usually, low power consumption is difficult to cover long distances, and long-distance power consumption is generally high; however, LORA The biggest feature is that under the same power consumption condition, the transmission distance is farther than other wireless methods, realizing the unity of low power consumption and long distance. It is 3 times longer than the traditional wireless radio frequency communication distance under the same power consumption -5 times;

Features of LORA:

1) Transmission distance: up to 2-5 Km in towns and up to 15 Km in suburbs;

2) Working frequency: ISM frequency band includes 433, 868, 915 MH, etc.;

3) Standard: IEEE 802.15.4g;

4) Modulation method: based on spread spectrum technology, a variant of linear modulation spread spectrum (CSS), with forward error correction (FEC) capability;

5) Capacity: A LORA gateway can connect thousands of LORA nodes;

6) Battery life: up to 10 years;

7) Security: AES128 encryption;

8) Transmission rate: hundreds to tens of Kbps, the lower the rate, the longer the transmission distance, like a person picking things, if you pick more things, you can't go far, if you pick less, you can go far.

Advantage of the present invention and positive effect are:

1. The temperature detector automatically reads the temperature, humidity and temperature measurement point position data of the temperature measurement cable, and sends multiple data of the temperature measurement point to the repeater through wireless mode. Each temperature detector is self-adaptive and compatible to support 1- The temperature measurement cable with 32 temperature measurement points, the temperature measurement range is -55°C to +125°C, and the highest accuracy can reach ±0.5°C; the monitoring cycle is shortened to the minute level, and the monitoring frequency is at least 60 times higher than the hourly level of manual monitoring; It solves the problem of food loss caused by manual monitoring workload, long detection cycle, easy missed detection, and untimely detection and alarm; the temperature detector has IP67 waterproof level, low power consumption, and its lifespan is three times higher than that of the existing technology, with a long lifespan 10 years;

2. The repeater is located outside the granary. It receives the temperature and humidity data measured by all the temperature detectors in the granary, and preprocesses and buffers the data. The temperature data is packaged and sent to the concentrator through LORA wireless spread spectrum communication technology. The transmission distance can reach 2-3 kilometers, and you can also use Ethernet repeaters or WIFI repeaters to directly send data to the data processing center of the granary;

3. The concentrator is installed in the data processing center of the granary and connected to the edge server. If the system does not configure an edge server, the concentrator can be directly connected to the main control computer of the grain situation management system, making full use of a large amount of data for analysis and early warning ;

4. The edge server provides edge computing for smart terminals, and puts a large amount of data storage, analysis, calculation, filtering and other functions on the client side, providing concise and efficient data for the cloud platform, while protecting user data from leakage, and solving the most important relationship between users data privacy security issues; the present invention adopts wireless monitoring mode, which solves the problems of complex wiring and difficult upgrading of the granary;

5. The present invention utilizes advanced wireless spread spectrum communication technology and sensor technology in today's Internet of Things technology to realize remote automatic measurement, collection, data statistics and analysis of granary temperature parameters. Compared with the traditional manual measurement method, it greatly improves the temperature measurement efficiency, the accuracy of temperature and humidity data measurement, data security and installation convenience, and reduces the construction cost of the grain monitoring system. It is the goal of smart food construction proposed by the state preferred technical solution;

6. Using electronic temperature measuring components such as thermistors as the basis, using PC as the control core, introducing splitter technology, adopting matrix wiring mode, analog data output, which can be stored, displayed, and printed, and digital temperature sensors such as DS18B20 as the basis Basic, data such as humidity other than temperature can be monitored, transmitted in digital form, and wireless communication methods such as LORA are used to further simplify and optimize wiring;

7. If the temperature measuring device is replaced with a gas and pest detector, and the temperature measuring cable is replaced with a gas sampling and pest trap, and the other remains unchanged, then the present invention becomes an intelligent measurement and control system for grain conditions, which can detect phosphine , oxygen, carbon dioxide and other gases, and can also detect pests such as corn weevil, rice weevil, grain beetle, and large grain robber; use the characteristics of pests such as phototaxis, height orientation, and new grain orientation to attract pests into the pest trap; through the extraction method , Extract the gas and pests into the gas and pest detector for detection.

Description of drawings

Fig. 1 is a kind of block diagram of temperature real-time acquisition device;

Fig. 2 is a schematic structural view of a temperature measuring device of the present invention;

Fig. 3 is a structural schematic diagram of the temperature and humidity instrument inside and outside the warehouse of the present invention;

Fig. 4 is a structural schematic diagram of the repeater of the present invention;

Fig. 5 is a schematic structural view of the concentrator of the present invention;

Fig. 6 is the second of a kind of block diagram of temperature real-time acquisition device;

Fig. 7 is a schematic diagram of a granary application of a temperature real-time acquisition device;

In the figure, 1-bottom cover of waterproof box; 2-top cover of waterproof box; 3-control circuit board; 4-built-in antenna; 5-battery/chip; 6-waterproof connector; Humidity probe; 9-waterproof aluminum shell lower shell; 10-waterproof aluminum shell upper shell; 11-repeater main board; 12-metal waterproof connector; 13-power adapter socket; 14-antenna; 16-Power switch; 17-ABS shell upper cover; 18-ABS shell lower cover; 19-Concentrator main board; 20-Waterproof connector; 21-Power/485 cable; 22-Second antenna extension line; Antenna; 31-main control computer; 32-concentrator; 33-repeater; 34-temperature detector; 35-temperature and humidity inside the warehouse; 36-temperature and humidity outside the warehouse; Cable; 41-digital temperature sensor; 42-granary; 43-grain; the dotted line in Fig. 7 represents the wireless signal connection.

Detailed ways

Figure 1 is a block diagram of a real-time temperature acquisition device, including a temperature detector, which is connected to a temperature measurement cable, and the temperature measurement cable contains 9 temperature measurement points, and each temperature measurement point is equipped with a digital temperature sensor; every 3 temperature measurement points The repeaters are connected to the repeaters through wireless signals, and every 3 repeaters are connected to the concentrator through wireless signals, and each concentrator is connected to the main control computer through the data bus; the number of temperature detectors is 18, and the number of repeaters is 6. The number of concentrators is 2. The distance between each digital temperature sensor and the digital temperature sensor is 0.8 meters, and they are connected to each other in parallel.

Fig. 2 is a schematic diagram of the structure of the temperature measuring device of the present invention; the outside of the temperature measuring device is a waterproof box, and the control circuit board, battery, chip and built-in antenna connected to each other are fixed inside, and a waterproof connector is embedded in the lower end of the waterproof box, and the temperature measuring cable passes through the waterproof The joint is connected to the control circuit board inside the temperature detector, and the inside of the temperature detector is filled with a potting adhesive layer.

The main control chip of the temperature detector adopts the STM8 series chip launched by ST Company. The clock circuit of the temperature detector adopts a 32.768KHz passive crystal oscillator to connect with the main control chip OSC32_IN and OSC32_OUT. The wireless transmission of the temperature detector adopts the LoRa wireless module, and the module chip adopts SEMTECH Company The SX1278/SX1276 radio frequency chip supports LoRa spread spectrum technology. The module is connected to the main control chip through the SPI interface, and is used to transmit the temperature data collected by the temperature detector, the measurement point data and the temperature detector information. The power supply uses an external battery Composition, the temperature measurement cable connection port is reserved for the use of temperature measurement cables, temperature measurement probes, etc., and is connected to the main control chip using the I2C protocol. The temperature measurement cables, temperature measurement probes, etc. upload data to the Thermometer.

Figure 3 is a schematic diagram of the structure of the temperature and humidity instrument inside and outside the warehouse of the present invention, including a lower cover of the waterproof box 1, an upper cover of the waterproof box 2, a control circuit board 3, a built-in antenna 4, a battery/chip 5, a waterproof connector 6, and a temperature and humidity probe 8.

Figure 4 is a structural schematic diagram of the repeater of the present invention; the outside of the repeater is a waterproof aluminum casing, and the side of the waterproof aluminum casing is embedded with a power switch, a power adapter socket and a metal waterproof connector, and the inside of the repeater is fixed with interconnected repeaters Main board, storage battery and the first antenna extension line; outside the repeater, there is an antenna, which is connected to the first antenna extension line inside the repeater through a metal waterproof connector; the power switch and the power adapter are respectively electrically connected to the repeater main board.

The main control chip of the repeater adopts two STM32F103 series chips launched by ST Company, and the two main control chips are respectively connected with two LoRa wireless modules, which are used to control the communication between the repeater and the temperature detector and concentrator. The repeater can choose Wi-Fi communication. At this time, the repeater does not need to establish a connection with the concentrator, but connects to the user Wi-Fi network and the cloud platform. The clock circuit is composed of two crystal oscillators and their load capacitors, respectively. Clock crystal oscillator and RTC clock crystal oscillator, the main clock crystal oscillator is connected to OSC_IN and OSC_OUT, and the RTC clock crystal oscillator is connected to OSC32_IN and OSC_OUT.

The power supply of the repeater is powered by a power adapter and a lithium battery. The battery management chip is used to control the charging and discharging of the battery. The power is output from the battery management chip to the DC/DC power regulator chip and then outputs a stable voltage. The wireless transmission of the repeater uses two LoRa modules. , the module chip adopts the RF chip of SEMTECH Company, supports LoRa spread spectrum technology, the two modules are respectively connected to the corresponding main control chip through the SPI interface, and the repeater antenna adopts the fiberglass antenna or the sucker antenna to receive the temperature detector signal and transmit the signal to the centralized device.

There are three networking methods for repeaters: LoRa ad hoc networking, Wi-Fi LAN networking, and RJ45 wired LAN networking. The repeater adopts a dual-antenna design, one is used for communication between the temperature detector and the repeater, and the other is used for networking. There are two installation methods for the communication antenna between the temperature detector and the repeater. When the radio frequency signal of the temperature detector can penetrate obstacles such as the walls of the granary, it can be installed directly on the repeater. When the radio frequency signal of the temperature detector cannot penetrate When penetrating through obstacles such as the walls of the granary, use the method of extending the antenna into the granary to receive the radio frequency signal of the temperature detector.

The ID/address setting of the repeater is realized by a multi-digit dial switch, and the microcontroller directly reads the value of the dial switch as the device ID/address, and the user can easily set the device ID/address.

Fig. 5 is a structural schematic diagram of the concentrator of the present invention; the outside of the concentrator is an ABS shell, the lower end of the ABS shell is connected to the power cable through a waterproof joint, the upper end of the ABS shell is embedded with a second antenna extension line, and the inside of the concentrator is A concentrator main board and a storage battery connected to each other are fixed, the second antenna extension line is internally connected to the concentrator main board, and the second antenna extension line is externally connected to an omnidirectional fiberglass antenna.

The main control chip of the concentrator adopts the STM32F103 series chip launched by ST Company. The clock circuit consists of two crystal oscillators and their load capacitors, which are respectively the main clock crystal oscillator and the RTC clock crystal oscillator. After outputting a stable voltage, the 485 communication circuit is used for the communication between the concentrator and the edge server. The wireless transmission adopts the LoRa wireless module. The module chip adopts the RF chip of SEMTECH Company, which supports LoRa spread spectrum technology. The module is connected to the corresponding main control chip through the SPI interface. , The antenna uses a fiberglass antenna to receive the repeater signal. The ID/address setting of the concentrator is realized by a multi-digit dial switch, and the microcontroller directly reads the value of the dial switch as the device ID/address, and the user can easily set the device ID/address.

Fig. 6 is the second block diagram of a kind of temperature real-time acquisition device; Between the concentrator and the main control computer of Fig. 1, an edge server is arranged, and the edge server is respectively connected to the concentrator and the main control computer through the data bus; The temperature and humidity meter inside the warehouse, and the concentrator is connected to the temperature and humidity meter outside the warehouse.

The edge server provides edge computing for smart terminals, puts a large amount of data storage, analysis, calculation, filtering and other functions on the client side, provides concise and efficient data for the cloud platform, and at the same time protects user data from leakage and solves the most relevant data for users Privacy security issues. Traditional systems are not equipped with edge servers because of the small amount of data and low intelligence.

Figure 7 is a schematic diagram of a granary application of a real-time temperature acquisition device. The temperature measuring cable is arranged vertically on the axis of the granary. The temperature measuring cable includes 9 digital temperature sensors arranged in parallel along the axis. The temperature detector is connected downward to measure the temperature. cable, the temperature detector is wirelessly connected to the repeater, the repeater is wirelessly connected to the concentrator, and the concentrator is connected to the main control computer.

The wireless signal connection of the present invention is a connection based on LORA wireless communication technology.

The invention automatically reads the temperature and measuring point position data of the temperature measuring cable through the temperature measuring device, and sends the temperature and measuring point data to the repeater in a wireless manner, and each temperature measuring device supports the temperature measurement of 32 temperature measuring points at most cable. The repeater is located outside the granary. It receives the temperature data measured by all the temperature detectors in the granary, preprocesses and buffers the temperature data, and sends the temperature data to the concentrator through wireless spread spectrum communication technology. The concentrator is installed in the data processing center of the granary and connected to the edge server. If the system does not configure an edge server, the concentrator can be directly connected to the main control computer of the grain management system to receive the data packets sent by the repeater in the granary. , Analyze the data packet, use the MODBUS communication mechanism, and transmit the data to the push server or the main control computer of the grain management system according to the custom data frame protocol format. Adopt plug-in software architecture design, compatible with multiple communication standards of the Internet of Things: MQTT, COAP; plug and play device drivers, support MySQL, Sqlite and other database connections, support Modbus standards, and be compatible with existing control systems.

The present invention utilizes the advanced wireless spread spectrum communication technology and sensor technology in today's Internet of Things technology to realize remote automatic measurement, collection, data statistics and analysis of granary temperature parameters. Compared with the traditional manual measurement method, it greatly improves the temperature measurement efficiency and temperature measurement accuracy.

Application cases of the present invention

A grain warehouse in Guangzhou covers an area of 170 mu. There are 16 tall one-story warehouses with a total storage capacity of 100,000 tons. The main storage varieties are rice, wheat, and corn. There are currently 36 employees. Due to the high temperature and high humidity in the south Ecological zone, continuous high temperature in summer, difficult to store grain, high cost, and rapid decline in the quality of stored grain.

Before the application of the present invention, the temperature and humidity were manually measured. When the temperature exceeded the standard, the axial flow fan was turned on to ventilate, so as to reduce the temperature and humidity. However, because the temperature and humidity measurement and the corresponding measures were not taken in time, the temperature and humidity were only measured once per hour. , and the depth of the grain warehouse cannot be measured manually, causing grain deterioration every year, and the grain loss rate is as high as 0.9%;

Applying the present invention, 72 temperature measuring devices and 72 temperature measuring cables are used in total, and each temperature measuring cable is connected with 12 digital temperature sensors in parallel, with a total length of 12 meters and a total of 864 temperature measuring points; every 6 temperature measuring Each repeater is wirelessly connected to 1 repeater, a total of 12 repeaters, and every 4 repeaters are respectively wirelessly connected to a concentrator, a total of 3 concentrators, and each concentrator is connected to the main control computer; refer to Figure 7 .

The digital temperature sensor of the present invention automatically measures temperature, humidity and other indicators online, and the measurement frequency reaches once per minute, and can also be measured in the depths of the grain warehouse. If the temperature and humidity exceed the standard, the system will immediately and automatically take measures such as ventilation and cooling to greatly reduce grain deterioration. The resulting loss, the grain loss rate was reduced to 0.3%, and 600,000 yuan of grain loss was recovered every year.

Moreover, due to the automatic on-line measurement of temperature and humidity and other indicators, 10 storekeepers are saved, 1.4 million yuan in labor costs is saved each year, and the total annual savings is nearly 2 million yuan, while the cost of applying a real-time temperature acquisition device of the present invention is only 360 yuan. Ten thousand yuan, the investment funds can be recovered in two years, with remarkable economic benefits and great promotion and application value.

Claims (2)

1. A temperature real-time acquisition device, comprising a temperature detector, the temperature detector is connected to a temperature measurement cable, and the temperature measurement cable comprises N temperature measurement points, and each temperature measurement point is provided with a digital temperature sensor; N The temperature detectors are connected to the repeater through wireless signals, the N repeaters are connected to the concentrator through wireless signals, and the N concentrators are connected to the main control computer through a data bus; the number of N is: 1≤N≤120; The distance between each of the digital temperature sensors and the digital temperature sensors is 0.5 to 2 meters, and they are connected to each other in parallel; The outside of the temperature detector is a waterproof box, and a waterproof joint is embedded in the lower end of the waterproof box; the inside of the temperature detector is fixed with a control circuit board, a battery, a chip and a built-in antenna connected to each other, and the inside of the temperature detector is filled with filling the potting glue layer; the temperature measurement cable is connected to the control circuit board through the waterproof joint; The outside of the repeater is a waterproof aluminum casing, and the side of the waterproof aluminum casing is embedded with a power switch, a power adapter socket and a metal waterproof connector; An antenna extension line; the first antenna is connected to the first antenna extension line through the metal waterproof connector; the power switch and the power adapter are respectively electrically connected to the repeater main board, and there is a temperature and humidity display in the warehouse connecting said repeater; The outside of the concentrator is an ABS shell, the upper end of the ABS shell is embedded with a second antenna extension line, the lower end of the ABS shell is connected to the power cable through a waterproof connector, and the concentrator main board and the battery are fixed inside the concentrator The second antenna extension line is internally connected to the main board of the concentrator, and externally connected to the omnidirectional fiberglass antenna; a temperature and humidity display outside the warehouse is connected to the concentrator. 2. A kind of temperature real-time acquisition device as claimed in claim 1, it is characterized in that: between said concentrator and said main control computer, be provided with edge server, described edge server is respectively connected with each other through data bus. The concentrator and the main control computer; the wireless signal connection is a connection based on LORA wireless communication technology.