CN212931679U

CN212931679U - Concrete temperature measurement system based on loRa

Info

Publication number: CN212931679U
Application number: CN202021291750.6U
Authority: CN
Inventors: 费翔; 高天迎; 高琳
Original assignee: Tianjin Chengjian University
Current assignee: Tianjin Chengjian University
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2021-04-09
Anticipated expiration: 2030-07-06

Abstract

A concrete temperature measurement system based on LoRa comprises a data acquisition module, a data transmission gateway and a data monitoring center; the data acquisition module comprises an acquisition terminal and one or more temperature sensors, the acquisition terminal comprises an MCU (microprogrammed control Unit), a sensor port, a storage unit and a power supply module, the MCU adopts an SoC (system on a chip) module with a LoRa (LoRa) function, and the sensor port is connected with one or more concrete embedded lines; the data transmission gateway comprises a processor core, an LoRa gateway module, a display module, an input module, a point-to-point port, a public network interface, a storage unit and a power supply module, wherein the LoRa gateway module is connected with an MCU of the data acquisition terminal; the data acquisition module and the data transmission gateway are communicated through LoRa, and the data transmission gateway sends data to the data monitoring center. The system can realize large-range, multi-point, long-distance and remote detection of concrete temperature measurement data, and the detection has real-time performance, accuracy, effectiveness, stability and flexibility.

Description

Concrete temperature measurement system based on loRa

Technical Field

The utility model belongs to construction monitoring field especially relates to a concrete temperature measurement system based on loRa.

Background

At present, when the traditional technology is adopted for concrete temperature measurement, the transmission of temperature data is mostly in a wired mode, and the part of the data is in a GPRS mode. The above method has the following disadvantages:

1. the wired method requires the communication network to be laid, and generally adopts the form of a pre-buried wire. This can cause problems of high wire costs and inconvenient deployment during construction. The conditions of a construction site are complex, and the conditions such as cable disconnection and the like can also occur, so that the detection stability can be greatly influenced. And the lengthy wiring creates signal attenuation, wired transmission typically requires the deployment of a detection room in the field, which increases the workload.

The general method is that data are collected in a wired mode first, and then GPRS forwarding is carried out on a single point. This approach also does not provide good wire savings.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of above-mentioned prior art, the utility model provides a concrete temperature measurement system based on loRa, this system can realize that concrete temperature measurement data detects and detects on a large scale, multiple measuring points, long distance and strange land and has real-time, accuracy, validity, stability and flexibility.

As the conception, the utility model adopts the technical proposal that: the utility model provides a concrete temperature measurement system based on loRa which characterized in that: the system comprises a data acquisition module, a data transmission gateway and a data monitoring center; the data acquisition module comprises an acquisition terminal and one or more temperature sensors, the acquisition terminal comprises an MCU (microprogrammed control Unit), a sensor port, a storage unit and a power supply module, the MCU adopts an SoC (system on chip) module with a LoRa (LoRa) function, the sensor port is connected with one or more concrete embedded lines, and one concrete embedded line is connected with one temperature sensor or the concrete embedded lines are connected with the plurality of temperature sensors in parallel in a bus mode; the data transmission gateway comprises a processor core, an LoRa gateway module, a display module, an input module, a point-to-point port, a public network interface, a storage unit and a power supply module, wherein the LoRa gateway module is connected with an MCU of a data acquisition terminal, the point-to-point port provides connection among gateways, the public network interface is accessed to the Internet, the display module and the input module provide IO control for a user, and the processor core controls the LoRa gateway module, the display module, the input module, the storage unit and the power supply module; the data acquisition module and the data transmission gateway are communicated through LoRa, and the data transmission gateway sends data to the data monitoring center.

Furthermore, the power supply modules of the acquisition terminal and the data transmission gateway can be directly connected with the mains supply and can also be powered by a battery.

Further, the acquisition terminal is provided with a keyboard and a screen.

Further, the storage unit of the acquisition terminal adopts a TF card or an EEPROM.

Furthermore, the sensor port of the acquisition terminal is connected with at most four concrete embedded lines.

Furthermore, each concrete embedded line is connected with at most 8 temperature sensors.

Further, the temperature sensor employs DS18B 20.

Further, the data monitoring center is a PC or a server or a tablet device.

The utility model discloses have following advantage and positive effect:

1. the utility model discloses the SoC module that utilizes to take the loRa function compromises the function of controlling temperature sensor and loRa communication as MCU, has broken traditional singlechip and has connected the form of loRa module and temperature sensor. Has the following advantages:

firstly, an SoC module with an LoRa function is used as an acquisition terminal of the MCU, the maximum transmission distance of a single point can reach more than 2000m, and 2000m can be used as a subregion to arrange the terminal in large-range and long-distance concrete construction. And the LoRa modules on the terminals in the sub-areas transmit the acquired data to the gateway to form a sub-area network. The data transmission gateway of each area is positioned at a core position and collects the collected data on each terminal in the area. Then, the gateways in each area can form a 'transfer station type' structure by using a point-to-point communication mode, form a link formed by connecting area subnets in series, and forward data in the environment such as the field where access to the public network is difficult.

The SoC module with the LoRa function is used as the acquisition terminal of the MCU, the acquisition terminal can be configured according to different application scenes, the acquisition terminal can be configured in different working modes, and traditional single-point temperature measurement can be carried out, namely one concrete embedded line is connected with one temperature sensor, and at most 8 embedded lines can be connected with one terminal, so that eight temperature sensors are controlled. In order to reduce the cost, a bus type mode that up to eight temperature sensors are connected in parallel on a concrete embedded line can be adopted, and the device is suitable for the requirement that a plurality of temperature measuring points are arranged on the same axis.

The SoC module with the LoRa function is used as the acquisition terminal of the MCU to locally store the temperature detection value, the mode is convenient to realize the deployment of single-point temperature measurement, and the reliability of data is enhanced.

And fourthly, the SoC module with the LoRa function is used as an acquisition terminal of the MCU to carry out the working mode of acquiring the temperature at regular time or acquiring after the data transmission gateway sends an acquisition command, and the time interval of the acquisition of the temperature at regular time can be set. The terminal can enter the sleep mode in time when not collecting temperature data, so that the power consumption is reduced, and the service life of the battery is prolonged.

2. The utility model discloses a data transmission gateway can establish the intranet, and configuration Web service includes simultaneously: RJ45, Wi-Fi, NB-IOT, etc. The interfaces can transmit the integrated data to a remote data monitoring center in the environment of connecting a public network, and can also realize cloud platform application (using a third-party cloud platform, such as WeChat and the like). The application scenarios of the system are greatly enriched by various data collection modes.

Form of data transmission gateway: in medium range monitoring (within 2000 m), a single network can be constructed, utilizing a Web server of the gateway. If a specially-designed office is arranged on the construction site, data monitoring can be carried out by utilizing a PC (personal computer) or mobile office and multi-person cooperative work can be carried out through an Android platform APP (application) mode.

In a wider range of monitoring (2000m and above), multiple regional subnets can be constructed. If the conditions for accessing the public network exist, various interfaces of the gateway can be utilized to transmit the acquired data through the Internet; or by point-to-point communication between gateways.

3. The utility model discloses a data monitoring center accessible public network connects distal end server. Meanwhile, a cloud platform is additionally arranged so that a user can conveniently operate the system in real time. The data monitoring center is used as a final data integration end, can store, arrange, analyze and the like temperature detection values, and can monitor the temperature change of the concrete in real time.

Drawings

FIG. 1 is a schematic diagram of the system of the present invention;

fig. 2 is a block diagram of the acquisition terminal of the present invention;

fig. 3 is a block diagram of the data transmission gateway of the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

the utility model provides a concrete temperature measurement system based on loRa, as shown in fig. 1, this system includes data acquisition module, data transmission gateway 2 and data monitoring center 3, and data acquisition module includes acquisition terminal 1 and a plurality of temperature sensor. The acquisition terminal 1 and the data transmission gateway 2 are communicated with each other through LoRa, the acquisition terminal is connected with a temperature sensor-DS 18B20 on a temperature measuring point in a bus mode through a concrete embedded line, the terminal acquires the temperature of each temperature measuring point of concrete, arranges and packages the data and sends the data to the data transmission gateway 2 through LoRa, and the data transmission gateway sends the data to the data monitoring center 3 by using a public network or an ad hoc network. The data monitoring center 3 is a PC or a server or a tablet device.

As shown in fig. 2, the acquisition terminal includes an MCU (SoC module 11 with LoRa function), a sensor port 12, a configuration port 13, a storage unit 14, and a power supply module 15. The power supply module 15 may be connected directly to the mains (where permitted on site) or may be battery powered. The LoRa module 11 is connected with a concrete embedded line through a sensor port 12, the concrete embedded line is connected with at most 8 temperature sensors DS18B20 in parallel in a bus mode, and then data arrangement and packaging are carried out, and LoRa is reused to send out. For improved reliability, the collected data is also kept locally, stored in the storage unit 14. The memory unit 14 may employ a TF card or an EEPROM.

The acquisition terminal is provided with a configuration port 13 for installing necessary input and output devices, such as: a keyboard and a screen. The method is suitable for scenes with sufficient power supply capacity, and the construction site can provide commercial power access for the terminal. However, under the condition that the mains supply is difficult to access, in order to improve the service cycle of the terminal under the support of independent battery power supply, the LoRa module of the terminal should be in a low-power-consumption dormant state most of the time, so the terminal also needs to support a related configuration mode by connecting configuration equipment, namely an independent device with a keyboard and a liquid crystal display, through an interface.

As shown in fig. 3, the data transmission gateway includes a processor core 21, a LoRa gateway module 22, a display module 23, an input module 24, a peer-to-peer port 25, a public network interface 26, a storage unit 27, and a power supply module 28. The power supply module 28 can be connected to the mains (if the field allows it), or can be powered by a battery (because of its high power consumption, it cannot guarantee a long-time standby). The acquisition terminal 1 is connected to the LoRa gateway module, and point-to-point port 25 provides the connection between the gateways, improves the configuration mode of system under the difficult condition of public network connection. The public network interface 26 is responsible for accessing the Internet. The storage unit 27 uses a TF card and sets a file system, installs a device operating system (Linux), and simultaneously can integrate and store data in the whole project monitoring into a fixed file format. The processor core 21 controls the LoRa gateway module 22, the display module 23, the input module 24, the storage unit 27, and the power supply module 28. The display module 23 and the input module 24 provide IO control for the user.

The utility model discloses acquisition terminal arranges in the concrete surface, and four at most pre-buried lines can be connected to sensor connection port 12. The pre-buried wires can adopt pressure-resistant and anti-corrosion wires, and each wire can be connected with eight sensors at most. The specific implementation process is as follows:

1) before concrete pouring, temperature sensors are installed and arranged on site according to technical specifications, and each temperature sensor is numbered (the number is defined by a user and corresponds to the internal ID of the sensor). Generally, it is required to be every 100m ²3 sampling points of the irrigation layer cloth are arranged in a quincunx shape. Each sampling point is downwards provided with embedded data lines in the direction vertical to the concrete pouring surface (each acquisition terminal of the system can be hooked with 8 embedded data lines, and the distance is 500m²Only one acquisition terminal needs to be installed in the range of the irrigation layer. The labor intensity of vertical wiring can be saved);

2) installing a cooling device according to the technical specification;

3) after concrete is poured, a user sets the upper and lower alarm limits of the internal temperature of the concrete according to the difference value of the sampling points of the internal temperature sensor and the surface of the concrete. The system provides five modes of single-point acquisition, single-line acquisition, single-network acquisition, whole-network acquisition and timing acquisition, and a user can set the timing acquisition interval time by himself.

4) After the internal temperature of concrete exceeds the alarm limit, the system can send out an alarm signal.

5) After concrete curing is finished, only the outer lead of the temperature sensor needs to be cut off on the surface of the concrete. The temperature sensor adopted in the system is a disposable consumable, is relatively small, is buried in concrete, and cannot influence the concrete pouring quality. The single chip microcomputer in the system transmits the temperature acquired by the temperature sensor to the computer in real time for monitoring, displays the temperature in a temperature curve form in real time, can also generate and print a report form, and is very visual.

The protection scope of the present invention is not limited to the above embodiments, and those skilled in the art can easily modify the technical solution of the present invention to achieve the same technical effects according to the above description, which all belong to the protection scope of the present invention.

Claims

1. The utility model provides a concrete temperature measurement system based on loRa which characterized in that: the system comprises a data acquisition module, a data transmission gateway and a data monitoring center; the data acquisition module comprises an acquisition terminal and one or more temperature sensors, the acquisition terminal comprises an MCU (microprogrammed control Unit), a sensor port, a storage unit and a power supply module, the MCU adopts an SoC (system on chip) module with a LoRa (LoRa) function, the sensor port is connected with one or more concrete embedded lines, and one concrete embedded line is connected with one temperature sensor or the concrete embedded lines are connected with the plurality of temperature sensors in parallel in a bus mode; the data transmission gateway comprises a processor core, an LoRa gateway module, a display module, an input module, a point-to-point port, a public network interface, a storage unit and a power supply module, wherein the LoRa gateway module is connected with an MCU of a data acquisition terminal, the point-to-point port provides connection among gateways, the public network interface is accessed to the Internet, the display module and the input module provide IO control for a user, and the processor core controls the LoRa gateway module, the display module, the input module, the storage unit and the power supply module; the data acquisition module and the data transmission gateway are communicated through LoRa, and the data transmission gateway sends data to the data monitoring center.

2. The LoRa-based concrete temperature measurement system according to claim 1, wherein: the power supply modules of the acquisition terminal and the data transmission gateway can be directly connected with commercial power and can also be powered by batteries.

3. The LoRa-based concrete temperature measurement system according to claim 1, wherein: the acquisition terminal is provided with a keyboard and a screen.

4. The LoRa-based concrete temperature measurement system according to claim 1, wherein: and the storage unit of the acquisition terminal adopts a TF card or an EEPROM.

5. The LoRa-based concrete temperature measurement system according to claim 1, wherein: and the sensor port of the acquisition terminal is connected with at most four concrete embedded lines.

6. The LoRa-based concrete temperature measurement system according to claim 1, wherein: and each concrete embedded line is connected with at most 8 temperature sensors.

7. The LoRa-based concrete temperature measurement system according to claim 1, wherein: the temperature sensor employs DS18B 20.

8. The LoRa-based concrete temperature measurement system according to claim 1, wherein: the data monitoring center is a PC or a server or a tablet device.