CN110930673A - Dual-communication automatic switching system and method for intelligent wireless temperature and humidity monitor - Google Patents
Dual-communication automatic switching system and method for intelligent wireless temperature and humidity monitor Download PDFInfo
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Abstract
The invention discloses a dual-communication automatic switching system and a dual-communication automatic switching method for an intelligent wireless temperature and humidity monitor, wherein a signal detection unit in the system is used for identifying and judging a network environment and signal strength; the LoRa serial port transparent transmission communication module is used for realizing data transmission with a LoRa network; the NB-IoT transparent transmission communication module is used for realizing data transmission with the NB-IoT network; the microcontroller is used for data calculation processing and integrating an application layer protocol, a session form, a data link layer protocol and a communication format; the data acquisition unit is used for acquiring detection data of the intelligent wireless temperature and humidity monitor; the timer sets the signal acquisition period of the data acquisition unit. The method sets time for data acquisition and recording, activates or closes the corresponding communication module according to the communication strategy, realizes data transmission and ensures successful receiving and transmitting. The system and the method are suitable for occasions of centralized and unified management and control of temperature and humidity, and timely, accurate and reliable transmission of temperature and humidity monitoring data is achieved.
Description
Technical Field
The invention relates to the technical field of wireless data communication, in particular to a dual-communication automatic switching system and method of an intelligent wireless temperature and humidity monitor.
Background
Temperature and humidity factors greatly affect electrical equipment, and high temperature and high humidity can affect the operation stability of the electrical equipment from the aspects of insulation strength, mould growth, metal corrosion, service life and the like. With the development of modern industry and the improvement of the precision degree of electrical equipment, the requirements on the environment and the monitoring of an electrical room are increasing. At present, the environmental state management of the electric room mainly adopts a manual periodical point inspection mode, and because the factory area is wide, the distribution of the electric room is scattered, the point inspection is difficult, and the point inspection method is single, the operating environment of the whole electric room cannot be comprehensively, timely and objectively judged by virtue of a pointer type hygrothermograph.
The abnormal action of the electrical equipment often takes place in an instant, real-time data monitoring and prejudgment are not available, and when the electrical room is abnormal, the manual work is difficult to find at the first time, so that the electrical equipment is easily damaged. Therefore, a centralized monitoring system is urgently needed on site, potential safety hazards of various electrical equipment caused by environmental changes of an electrical room can be timely found and early warned, and abnormal problems are assisted to be handled. In view of the characteristics of large production area range and scattered distribution of electric rooms in the metallurgical industry, a plurality of electric rooms are not provided with network connection points, if a wired mode is adopted, time and labor are wasted, the cost for realizing centralized monitoring is high, and the intelligent wireless temperature and humidity monitor cannot realize effective wireless transmission.
Because the metallurgy industry has the characteristic of being many-sided and wide, the traditional wireless transmission technology cannot meet the application requirements in terms of distance or power consumption. With the development of the internet of things, a low-power Wide-Area Network (LPWAN) technology with the characteristics of Wide coverage, multiple connections, low rate, low cost, low power consumption and the like has been developed, and currently, two main protocols of the LPWAN technology are LoRa and NB-IoT. The NB-IoT is a network protocol of a main push in the LPWAN, and has the advantages that a gateway does not need to be set up, the License frequency band and the operator frequency band can be used based on the existing cellular networking, and the capacity of a single-network access node is about 20 ten thousand; the defects are that the transmission speed is limited, the UART (universal asynchronous receiver/transmitter) of a low-speed communication interface is generally less than 100kbps, and the cellular network cannot be applied to a place with short coverage. LoRa has the advantages of high transmission speed (0.3-50 kbps) and application to places which cannot be covered by a cellular network; the method has the disadvantages that networking needs to be carried out based on the LoRa gateway, a node + gateway network deployment mode is adopted, the requirement on the deployment position of the gateway is high, the number of factors to be considered is large, the capacity of a single-network access node is about 6 ten thousand, the number of gateway channels, the node packet sending frequency, the size of a data packet and the like are related to the actual situation, and the number of the gateway channels is generally 500-5000.
According to the network environment characteristics of the industrial application field and the wireless communication technical characteristics of the LoRa and the NB-IoT, the LoRa gateway can be deployed for data transmission aiming at the area where the cellular network cannot cover or the NB-IoT signal is unstable. However, all wireless temperature and humidity monitors in the market currently only support one of the LoRa technology and the NB-IoT technology, and network environments in the field of industrial application include stable or unstable NB-IoT communication network environments and LoRa autonomous networking communication environments, and are limited by hardware application of a transmission module of the wireless temperature and humidity monitors, and if temperature and humidity monitoring data of ground and underground electric rooms such as a machine room, a high-low voltage distribution room, a transmission room, a UPS room and a PLC room are timely, accurate and reliable transmitted, two types of wireless temperature and humidity monitors must be used for networking according to the LoRa and NB-IoT wireless communication protocols respectively, so that difficulty in overall system development and later maintenance is caused, uniformity and integrity of project systems are affected, and system cost is increased.
Disclosure of Invention
The invention aims to solve the technical problem of providing a dual-communication automatic switching system and method of an intelligent wireless temperature and humidity monitor, overcomes the defects of temperature and humidity monitoring of traditional electrical equipment, is suitable for occasions with large range, uneven network distribution and scattered distribution and needing to realize centralized and unified temperature and humidity control, and realizes timely, accurate and reliable transmission of temperature and humidity monitoring data.
In order to solve the technical problems, the dual-communication automatic switching system of the intelligent wireless temperature and humidity monitor comprises an NB-IoT transparent communication module, an LoRa serial port transparent communication module, a microcontroller, a signal detection unit, a data acquisition unit and a timer, wherein the NB-IoT transparent communication module and the LoRa serial port transparent communication module are respectively used for realizing data transmission with an NB-IoT network and a LoRa network and are connected with the microcontroller, the signal detection unit is used for identifying and judging the network environment and the signal strength and transmitting a detection signal to the microcontroller, the data acquisition unit is used for acquiring the detection signal of the temperature and humidity monitor and transmitting the detection signal to the microcontroller, the timer sets the signal acquisition period of the data acquisition unit and controls the signal acquisition time of the data acquisition unit through the microcontroller, the microcontroller is used for data calculation processing, integrates an application layer protocol, a conversation form, a data link layer protocol and a communication format, and transmits received detection signals of the intelligent wireless temperature and humidity monitor to the remote terminal through the NB-IoT transparent transmission communication module or the LoRa serial port transparent transmission communication module respectively.
Furthermore, the system also comprises an external high-gain antenna, wherein the external high-gain antenna is connected with the signal detection unit and is used for enhancing the capacity of the signal detection unit for receiving the wireless signals.
Furthermore, the system also comprises a display, wherein the signal input end of the display is connected with the display signal output end of the microcontroller, and the temperature and humidity data detected by the intelligent wireless temperature and humidity monitor are displayed in real time.
Further, the system further comprises an early warning buzzer, the early warning buzzer is electrically connected with the microcontroller, the microcontroller presets a temperature and humidity threshold value, and when temperature and humidity data detected by the intelligent wireless temperature and humidity monitor is greater than the preset temperature and humidity threshold value, the microcontroller triggers the early warning buzzer to give an alarm.
Furthermore, the system also comprises a control keyboard, wherein the control keyboard is electrically connected with the microcontroller and is used for setting and modifying the operating parameters of the microcontroller.
Further, the remote terminal comprises a fixed IP data server, a monitoring and diagnosing server and/or an intelligent handheld terminal, and the fixed IP data server, the monitoring and diagnosing server and/or the intelligent handheld terminal are connected with the NB-IoT network and the LoRa network.
A double-communication automatic switching method of an intelligent wireless temperature and humidity monitor based on the automatic switching system comprises the following steps:
the method comprises the steps that firstly, time synchronization is carried out, the intelligent wireless temperature and humidity monitor has a real-time clock function, and a microcontroller synchronizes the real-time of the intelligent wireless temperature and humidity monitor with network time and automatically corrects the real-time and the network time for timestamp recording and accurate control of communication time;
step two, data acquisition and recording, namely, carrying out temperature and humidity data detection by the intelligent wireless temperature and humidity monitor according to a set period of a timer, recording a group of temperature and humidity data, attaching a detection timestamp, and storing the temperature and humidity detection data;
step three, the microcontroller performs self-checking on the node state of the intelligent wireless temperature and humidity monitor, the state of the NB-IoT transparent transmission communication module, the state of the LoRa serial port transparent transmission communication module and the communication signal intensity detected by the signal detection unit, and uploads self-checking data, gateway information and base station information to a remote terminal;
step four, a communication strategy is adopted, according to the network environment and the signal strength identified and judged by the signal detection unit, when the signal strength of the area NB-IoT network base station is more than or equal to 16dbm, the microcontroller activates the NB-IoT transparent transmission communication module, closes the LoRa serial port transparent transmission communication module, and adopts the NB-IoT transparent transmission communication module to perform data transmission; when the signal intensity of the NB-IoT network base station in the area is more than or equal to 8dbm and less than 16dbm, activating the NB-IoT transparent transmission communication module and the LoRa serial port transparent transmission communication module, and adopting dual-channel redundant data transmission; when the signal intensity of the NB-IoT network base station is less than 8dbm, closing the NB-IoT unvarnished transmission communication module, activating the LoRa serial port unvarnished transmission communication module, and performing data transmission by adopting the LoRa network; the data transmission communication adopts a dialogue mechanism to ensure that data is successfully received and transmitted each time.
The dual-communication automatic switching system and the dual-communication automatic switching method for the intelligent wireless temperature and humidity monitor adopt the technical scheme that a signal detection unit in the system is used for identifying and judging the network environment and the signal strength; the LoRa serial port transparent transmission communication module is used for realizing data transmission with a LoRa network; the NB-IoT transparent transmission communication module is used for realizing data transmission with the NB-IoT network; the microcontroller is used for data calculation processing and integrating an application layer protocol, a session form, a data link layer protocol and a communication format; the data acquisition unit is used for acquiring detection data of the intelligent wireless temperature and humidity monitor; the timer sets the signal acquisition period of the data acquisition unit. The method sets time for data acquisition and recording, activates or closes the corresponding communication module according to the communication strategy, realizes data transmission and ensures successful receiving and transmitting. The system and the method overcome the defect of temperature and humidity monitoring of the traditional electrical equipment, are suitable for occasions with large range, uneven network distribution, scattered distribution and the need of realizing centralized and unified temperature and humidity control, and realize timely, accurate and reliable transmission of temperature and humidity monitoring data.
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The invention is described in further detail below with reference to the following figures and embodiments:
FIG. 1 is a schematic block diagram of a dual communication automatic switching system of an intelligent wireless temperature and humidity monitor according to the present invention;
fig. 2 is an application schematic diagram of a dual-communication automatic switching system of the intelligent wireless temperature and humidity monitor of the present invention.
Detailed Description
For example, as shown in fig. 1, the dual-communication automatic switching system of the intelligent wireless temperature and humidity monitor of the present invention includes an NB-IoT transparent communication module 1, an LoRa serial port transparent communication module 2, a microcontroller 3, a signal detection unit 4, a data acquisition unit 5 and a timer 6, where the NB-IoT transparent communication module 1 and the LoRa serial port transparent communication module 2 are respectively used to implement data transmission with an NB-IoT network and an LoRa network and are connected to the microcontroller 3, the signal detection unit 4 is used to identify and judge a network environment and a signal strength and transmit a detection signal to the microcontroller 3, the data acquisition unit 5 is used to acquire a detection signal of a temperature and humidity monitor 7 and transmit the detection signal to the microcontroller 3, the timer 6 sets a signal acquisition period of the data acquisition unit 5 and controls a signal acquisition time of the data acquisition unit 5 through the microcontroller 3, the microcontroller 3 is used for data calculation processing, integrates an application layer protocol, a conversation form, a data link layer protocol and a communication format, and transmits the received detection signals of the intelligent wireless temperature and humidity monitor 7 to a remote terminal through the NB-IoT transparent transmission communication module 1 or the LoRa serial port transparent transmission communication module 2 respectively.
Preferably, the system further includes an external high-gain antenna 8, the external high-gain antenna 8 is connected to the signal detection unit 4, and the external high-gain antenna 8 is configured to enhance the capability of the signal detection unit 4 to receive wireless signals.
Preferably, the system further comprises a display 91, wherein a signal input end of the display 91 is connected with a display signal output end of the microcontroller 3, and the temperature and humidity data detected by the intelligent wireless temperature and humidity monitor 7 are displayed in real time.
Preferably, the system further comprises an early warning buzzer 92, the early warning buzzer 92 is electrically connected with the microcontroller 3, the microcontroller 3 presets a temperature and humidity threshold value, and when temperature and humidity data detected by the intelligent wireless temperature and humidity monitor 7 is greater than the preset temperature and humidity threshold value, the microcontroller 3 triggers the early warning buzzer 92 to alarm.
Preferably, the system further comprises a control keyboard 93, wherein the control keyboard 93 is electrically connected with the microcontroller 3, and the control keyboard 93 is used for setting and modifying the operating parameters of the microcontroller 3.
Preferably, the remote terminal comprises a fixed IP data server, a monitoring and diagnosing server and/or an intelligent handheld terminal, and the fixed IP data server, the monitoring and diagnosing server and/or the intelligent handheld terminal are connected with the NB-IoT network and the LoRa network.
A double-communication automatic switching method of an intelligent wireless temperature and humidity monitor based on the automatic switching system comprises the following steps:
the method comprises the steps that firstly, time synchronization is carried out, the intelligent wireless temperature and humidity monitor has a real-time clock function, and a microcontroller synchronizes the real-time of the intelligent wireless temperature and humidity monitor with network time and automatically corrects the real-time and the network time for timestamp recording and accurate control of communication time;
step two, data acquisition and recording, namely, carrying out temperature and humidity data detection by the intelligent wireless temperature and humidity monitor according to a set period of a timer, recording a group of temperature and humidity data, attaching a detection timestamp, and storing the temperature and humidity detection data;
step three, the microcontroller performs self-checking on the node state of the intelligent wireless temperature and humidity monitor, the state of the NB-IoT transparent transmission communication module, the state of the LoRa serial port transparent transmission communication module and the communication signal intensity detected by the signal detection unit, and uploads self-checking data, gateway information and base station information to a remote terminal;
step four, a communication strategy is adopted, according to the network environment and the signal strength identified and judged by the signal detection unit, when the signal strength of the area NB-IoT network base station is more than or equal to 16dbm, the microcontroller activates the NB-IoT transparent transmission communication module, closes the LoRa serial port transparent transmission communication module, and adopts the NB-IoT transparent transmission communication module to perform data transmission; when the signal intensity of the NB-IoT network base station in the area is more than or equal to 8dbm and less than 16dbm, activating the NB-IoT transparent transmission communication module and the LoRa serial port transparent transmission communication module, and adopting dual-channel redundant data transmission; when the signal intensity of the NB-IoT network base station is less than 8dbm, closing the NB-IoT unvarnished transmission communication module, activating the LoRa serial port unvarnished transmission communication module, and performing data transmission by adopting the LoRa network; the data transmission communication adopts a dialogue mechanism to ensure that data is successfully received and transmitted each time.
The system integrates a signal detection unit, an LoRa serial port transparent communication module, an NB-IoT transparent communication module, a microcontroller, a data acquisition unit and a timer together according to the network environment characteristics in the industrial application field and the advantages and disadvantages of the wireless communication technology of LoRa and NB-IoT, performs network test through the signal detection unit, and automatically switches LoRa and NB-IoT double communication links according to the detected application scene network environment to select a more stable data transmission mode.
The system and the method can be used in different application network environments such as a stable NB-IoT communication network environment, an LoRa autonomous networking communication environment or an unstable NB-IoT communication network environment, and the like, thereby avoiding the problems of data acquisition and transmission of a plurality of firmware, protocol incompatibility and the like in the process of system development and use. The system and the platform are particularly suitable for large field area range and scattered electric room distribution (part of electric rooms have no network connection points, and part of electric rooms do not have LoRa gateway deployment conditions), but need to be uniformly and centrally controlled.
As shown in fig. 2, in practical application, the centralized monitoring system for temperature and humidity in an electric room comprises a data acquisition end composed of an intelligent wireless temperature and humidity monitor, a wide area network and a virtual fixed IP data server, an analysis end formed by an equipment online monitoring and diagnosis platform, related software and the like, and an application end composed of a remote access terminal, a mobile phone APP, a display and the like. The intelligent wireless temperature and humidity monitor is arranged in each electric room, environmental state data of the electric room in a factory are collected and analyzed, data visualization and temperature and humidity state monitoring are achieved, and the intelligent wireless temperature and humidity monitor is composed of four modules, namely map positioning, state monitoring, early warning classification and report statistics. The intelligent wireless temperature and humidity monitor realizes transmission of temperature and humidity monitoring data through the system and the method.
Map positioning: the method can intercept a plant area map from a satellite map, position the geographical position of the plant area, position the geographical position of each electric room step by step, click the plant area to position and access a plant area page, and display various temperature and humidity statistical data and alarm data in the map according to requirements.
And (3) state monitoring: the temperature and humidity conditions of different areas are visually displayed through state overview, the factory location is clicked to enter a sub-area temperature and humidity detail page, real-time numerical values of temperature and humidity points in each sub-area are checked, other area data are used for comparison in an auxiliary mode, and real-time weather data and outdoor temperature and humidity data are increased to be referred to.
Early warning classification: the user can set early warning rules by himself, the monitoring platform receives field detection data, the state of the measuring point is judged according to the early warning rules, and if the state is abnormal, the platform sends early warning notice to a designated user group in a Web mode, an APP mode, a short message mode and the like. The user can click the button to be processed, processed or ignored to process according to the actual situation.
And (4) report statistics: data in a specific time period can be recorded for carrying out report statistics, early warning statistics of different levels of a factory area in the same month are displayed, quantity distribution of temperature and humidity early warnings of the factory area is displayed, a user confirms and processes abnormal data statistics on site, and the user can manage report functions by himself.
The application of the centralized monitoring system for the temperature and humidity of the electric room realizes remote visual monitoring of the temperature and humidity of the electric room in a large-scale plant area, monitors the temperature and humidity of the electric room in real time, and ensures that electric equipment of the electric room can keep a good operating environment at any time.
The intelligent wireless temperature and humidity monitors are arranged in each electric room, the temperature and humidity changes of the electric rooms are monitored in a centralized and real-time manner, monitoring data are transmitted and collected to a centralized monitoring platform through LoRa and NB-IoT wireless communication, and all users can check related monitoring parameters on a remote terminal through authority authentication; when the abnormity occurs, the monitoring system can give an alarm in real time, the alarm information is directly sent to related personnel through short messages and the like, and meanwhile the alarm information can be checked on a remote terminal.
Claims (7)
1. The utility model provides a wireless temperature and humidity monitor's of intelligence dual-communication automatic switching system, includes NB-IoT passes through communication module and loRa serial ports passes through communication module, its characterized in that: the system also comprises a microcontroller, a signal detection unit, a data acquisition unit and a timer, wherein the NB-IoT transparent transmission communication module and the LoRa serial port transparent transmission communication module are respectively used for realizing data transmission with an NB-IoT network and a LoRa network and are connected with the microcontroller, the signal detection unit is used for identifying and judging network environment and signal strength and transmitting a detection signal to the microcontroller, the data acquisition unit is used for acquiring the detection signal of the temperature and humidity monitor and transmitting the detection signal to the microcontroller, the timer sets the signal acquisition period of the data acquisition unit and controls the signal acquisition time of the data acquisition unit through the microcontroller, the microcontroller is used for data calculation processing, integrates an application layer protocol, a conversation form, a data link layer protocol and a communication format, and the received detection signal of the intelligent wireless temperature and humidity monitor respectively passes through the NB-IoT transparent transmission communication module And the group or LoRa serial port transparent transmission communication module transmits the group or LoRa serial port transparent transmission communication module to the remote terminal.
2. The dual-communication automatic switching system of the intelligent wireless temperature and humidity monitor according to claim 1, characterized in that: the system further comprises an external high-gain antenna, the external high-gain antenna is connected with the signal detection unit, and the external high-gain antenna is used for enhancing the capacity of the signal detection unit for receiving the wireless signals.
3. The dual-communication automatic switching system of the intelligent wireless temperature and humidity monitor according to claim 1, characterized in that: the system further comprises a display, wherein the signal input end of the display is connected with the display signal output end of the microcontroller, and the temperature and humidity data detected by the intelligent wireless temperature and humidity monitor are displayed in real time.
4. The dual-communication automatic switching system of the intelligent wireless temperature and humidity monitor according to claim 1, characterized in that: the system further comprises an early warning buzzer, the early warning buzzer is electrically connected with the microcontroller, the microcontroller presets a temperature and humidity threshold value, and when temperature and humidity data detected by the intelligent wireless temperature and humidity monitor is greater than the preset temperature and humidity threshold value, the microcontroller triggers the early warning buzzer to give an alarm.
5. The dual-communication automatic switching system of the intelligent wireless temperature and humidity monitor according to claim 1, characterized in that: the system also comprises a control keyboard, wherein the control keyboard is electrically connected with the microcontroller and is used for setting and modifying the operating parameters of the microcontroller.
6. The dual-communication automatic switching system of the intelligent wireless temperature and humidity monitor according to claim 1, characterized in that: the remote terminal comprises a fixed IP data server, a monitoring and diagnosing server and/or an intelligent handheld terminal, and the fixed IP data server, the monitoring and diagnosing server and/or the intelligent handheld terminal are connected with an NB-IoT network and an LoRa network.
7. A double-communication automatic switching method of an intelligent wireless temperature and humidity monitor based on the automatic switching system of any one of claims 1 to 6, characterized by comprising the following steps:
the method comprises the steps that firstly, time synchronization is carried out, the intelligent wireless temperature and humidity monitor has a real-time clock function, and a microcontroller synchronizes the real-time of the intelligent wireless temperature and humidity monitor with network time and automatically corrects the real-time and the network time for timestamp recording and accurate control of communication time;
step two, data acquisition and recording, namely, carrying out temperature and humidity data detection by the intelligent wireless temperature and humidity monitor according to a set period of a timer, recording a group of temperature and humidity data, attaching a detection timestamp, and storing the temperature and humidity detection data;
step three, the microcontroller performs self-checking on the node state of the intelligent wireless temperature and humidity monitor, the state of the NB-IoT transparent transmission communication module, the state of the LoRa serial port transparent transmission communication module and the communication signal intensity detected by the signal detection unit, and uploads self-checking data, gateway information and base station information to a remote terminal;
step four, a communication strategy is adopted, according to the network environment and the signal strength identified and judged by the signal detection unit, when the signal strength of the area NB-IoT network base station is more than or equal to 16dbm, the microcontroller activates the NB-IoT transparent transmission communication module, closes the LoRa serial port transparent transmission communication module, and adopts the NB-IoT transparent transmission communication module to perform data transmission; when the signal intensity of the NB-IoT network base station in the area is more than or equal to 8dbm and less than 16dbm, activating the NB-IoT transparent transmission communication module and the LoRa serial port transparent transmission communication module, and adopting dual-channel redundant data transmission; when the signal intensity of the NB-IoT network base station is less than 8dbm, closing the NB-IoT unvarnished transmission communication module, activating the LoRa serial port unvarnished transmission communication module, and performing data transmission by adopting the LoRa network; the data transmission communication adopts a dialogue mechanism to ensure that data is successfully received and transmitted each time.
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