CN116466779A - Remote control system of constant temperature and humidity test box based on Internet of things - Google Patents
Remote control system of constant temperature and humidity test box based on Internet of things Download PDFInfo
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Abstract
The invention discloses a remote control system of a constant temperature and humidity test box based on the Internet of things. According to the invention, the temperatures of the dry bulb and the wet bulb in the box are acquired through the PT100 temperature sensor, the corresponding humidity is calculated, the acquired data are transmitted to the cloud platform through the NB-IoT wireless communication module in a CoAP protocol, and meanwhile, the control parameters forwarded by the cloud platform can be received, so that the whole system can be controlled through the application layer module in the use process of the whole system, profile files and encoding and decoding plug-ins are designed in the cloud platform, and the data uploaded by the test box are received and displayed in the cloud platform in real time. The design of the data forwarding and rule engine is completed, communication with the cloud server is realized, the control instruction issued by the application layer is received, and the platform can push alarm information when the uploaded data is abnormal, so that the safety of the whole system is improved, the loss caused by human negligence is avoided, and the safety of the whole system is further ensured.
Description
Technical Field
The invention belongs to the technical field of control of test boxes, and particularly relates to a remote control system of a constant temperature and humidity test box based on the Internet of things.
Background
The constant temperature and humidity box is widely used environment test equipment at present, can be used as special equipment for testing materials under various natural environment characteristics in environment tests, and plays a key role in various experiments with high temperature resistance, low temperature resistance, drying resistance and humidity resistance, so that whether various materials, parts and other facilities keep normal operation under the extreme environment possibly occurring can be judged. The demand for test chambers in the market today is growing rapidly.
The temperature in the test box can not be monitored in real time by the common test box management and control system in the use process, so that the use is inconvenient.
Disclosure of Invention
The invention aims at: in order to solve the problems, the remote control system of the constant temperature and humidity test box based on the Internet of things is provided.
The technical scheme adopted by the invention is as follows: the utility model provides a remote management and control system of constant temperature and humidity test box based on thing networking, includes start module, parameter acquisition module, data input module, temperature and humidity control output module, relay module, wireless communication module, thing networking platform module, application layer module, equipment access module, coding plug-in components module and server module, its characterized in that: the output end of the starting module is connected with the input end of the parameter acquisition module, the output end of the parameter acquisition module is connected with the input end of the data input module, the output end of the data input module is connected with the input end of the temperature and humidity control output module, the output end of the temperature and humidity control output module is connected with the input end of the relay module, the output end of the relay module is connected with the input end of the wireless communication module, the output end of the wireless communication module is connected with the input end of the Internet of things platform module, and the output end of the Internet of things platform module is connected with the input end of the application layer module.
In a preferred embodiment, an equipment access module, a coding plug-in module and a server module are arranged in the internet of things platform module, and the integral output ends of the equipment access module, the coding plug-in module and the server module are connected with the input end of the internet of things platform module.
In a preferred embodiment, the parameter acquisition module adopts a PT100 temperature sensor based on platinum resistance, and the acquisition range of the temperature is-200 ℃ to +850 ℃; the principle of the temperature sensor for collecting the ambient temperature is that according to the thermal effect of the resistor, a constant current mode is generally adopted, and when current flows through the resistor, the voltage of the resistor rises or falls regularly, so that different corresponding resistance values at different temperatures can be obtained;
the data input module is designed with 8 paths of inputs for feeding back the running state of the test box, each path of input is controlled by the TLP291 chip, the TLP291 chip is a photoelectric coupler, and in the running process of the test box, the running state of the executing mechanism is used as DI input and fed back to the main control chip, so that the main control chip can conveniently judge the working mode of the executing mechanism.
In a preferred embodiment, the temperature and humidity control output module adjusts pulse width through PWM technology and is used as an input interface of TLP291 chip, the singlechip is connected with the mcu_pid2 port, and the PID2 port is connected with the peripheral equipment, so as to realize control of executing mechanisms such as a compressor, and mainly comprises: the start-stop state of the test box and the working time of the executing mechanism are controlled, so that the adjustment of temperature and humidity is realized;
the relay module selects G5NB-1A-E-24VDC relays, 10 relays are designed, the relays are matched with a control output circuit to operate, and two ULN2003 chips are designed in the system to drive the relays to operate.
In a preferred embodiment, the wireless communication module completes the transmission process through a CoAP protocol based on a UDP channel, the cloud platform of the internet of things is a Server, the terminal test box is a Client, and the CoAP Server address provided by the cloud platform of the internet of things: a15f2108c2.iot-caps. Cn-north-4.myhuaweiciloud. Com port: 5683, completing communication connection, establishing Socket connection between the M5311 module and the base station, closing PSM mode after the equipment is connected to the network, and setting module eDRX period.
In a preferred embodiment, the process of the device access module includes the following steps:
in the development interface, attribute types in Profile files corresponding to Json types are respectively set through a newly added message button, the two types are mutually mapped, and the platform can be immediately deployed in defined products after generating plug-ins.
In a preferred embodiment, the server module selects a cloud server, the cloud server ECS can be directly invoked anywhere without limitation of geographic location, and the memory size and usage scale can be changed according to the service requirement without considering the problem of device limitation.
In a preferred embodiment, when the server module is used, firstly, the cloud server is configured with environment, the cloud server adopts a Linux system, installs a MySQL database and a Tomcat application server, configures JDK, python3 and other running environments, and simultaneously sets a security group interface.
In a preferred embodiment, the front end of the application layer module is mainly designed as a graphical interface, and simultaneously establishes communication with the back end, reads the data of the back end and displays the data in the interface, and performs a visualization operation on the data.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
according to the invention, the module in the platform module of the Internet of things summarizes the defects of the test box in the aspect of remote monitoring according to the technology of the Internet of things and the development current situation of the intelligent test box, so that a remote management and control system of the test box based on the Internet of things is designed. The hardware design of the system is mainly the design of a terminal layer. The data acquisition and wireless transmission are mainly realized in the terminal layer. The hardware design introduces a main control module, a power supply module, a signal input module, a signal output module and a wireless transmission module, and the corresponding circuit design is completed; the temperature of the dry bulb and the wet bulb in the PT100 temperature sensor is adopted, the corresponding humidity is calculated, the collected data is transmitted to the cloud platform through the NB-IoT wireless communication module in a CoAP protocol, meanwhile, the control parameters forwarded by the cloud platform can be received, the whole system can be controlled through the application layer module in the use process, profile files and encoding and decoding plug-ins are designed in the cloud platform, and the data uploaded by the test box are received and displayed in the cloud platform in real time. The design of the data forwarding and rule engine is completed, communication with the cloud server is realized, the control instruction issued by the application layer is received, and the platform can push alarm information when the uploaded data is abnormal, so that the safety of the whole system is improved, the loss caused by human negligence is avoided, and the safety of the whole system is further ensured.
Drawings
FIG. 1 is a system block diagram of the present invention;
fig. 2 is a block diagram of a platform module system of the internet of things in the present invention.
The marks in the figure: the system comprises a 1-starting module, a 2-parameter acquisition module, a 3-data input module, a 4-temperature and humidity control output module, a 5-relay module, a 6-wireless communication module, a 7-Internet of things platform module, an 8-application layer module, a 9-equipment access module, a 10-coding plug-in module and an 11-server module.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
With reference to figures 1-2 of the drawings,
the utility model provides a remote management and control system of constant temperature and humidity test box based on thing networking, including start module 1, parameter acquisition module 2, data input module 3, temperature and humidity control output module 4, relay module 5, wireless communication module 6, thing networking platform module 7, the applied layer module 8, equipment access module 9, coding plug-in components module 10 and server module 11, the output of start module 1 is connected with parameter acquisition module 2's input, parameter acquisition module 2's output is connected with data input module 3's input, data input module 3's output is connected with temperature and humidity control output module 4's input, temperature and humidity control output module 4's output is connected with relay module 5's input, relay module 5's output is connected with wireless communication module 6's input, wireless communication module 6's output is connected with thing networking platform module 7's input, thing networking platform module 7's output is connected with the input of applied layer module 8.
The device access module 9, the coding plug-in module 10 and the server module 11 are arranged in the internet of things platform module 7, and the input end of the internet of things platform module 7 is connected to the integral output end of the device access module 9, the coding plug-in module 10 and the server module 11.
The parameter acquisition module 2 adopts a PT100 temperature sensor based on platinum resistance, and the acquisition range of the temperature is-200 ℃ to +850 ℃. The principle of the temperature sensor for collecting the ambient temperature is based on the thermal effect of the resistor, and a constant current mode is generally adopted. When current flows through the resistor, the voltage of the resistor rises or drops regularly, so that different corresponding resistance values at different temperatures can be obtained;
the data input module 3 is designed with 8 paths of inputs for feeding back the running state of the test box, each path of input is controlled by the TLP291 chip, the TLP291 chip is a photoelectric coupler, and in the running process of the test box, the running state of the executing mechanism is used as DI input and fed back to the main control chip, so that the main control chip can conveniently judge the working mode of the executing mechanism.
The temperature and humidity control output module 4 adjusts pulse width through PWM technique and is used as the input interface of TLP291 chip, and MCU_PID2 port is connected to the singlechip, and PID2 port connection peripheral hardware can realize the control to actuating mechanism such as compressor, mainly includes: the start-stop state of the test box and the working time of the executing mechanism are controlled, so that the adjustment of temperature and humidity is realized;
the relay module 5 is selected from G5NB-1A-E-24VDC relays, 10 relays are designed to operate in cooperation with a control output circuit, and two ULN2003 chips are designed in the system to drive the relays to work. And the control of the executing mechanisms such as the condenser, the compressor, the fan, the throttle valve and the like is realized according to the connection and disconnection states of the relay.
The wireless communication module 6 completes the transmission procedure through the CoAP protocol based on the UDP channel. The cloud platform of the Internet of things is used as a Server, the terminal test box is used as a Client, and the CoAP Server address provided by the cloud platform of the Internet of things is used as a Client:
a15f2108c2.iot-caps. Cn-north-4.myhuaweiciloud. Com port: 5683, completing the communication connection. And the M5311 module establishes Socket connection with the base station, and after the equipment is connected to the network, the PSM mode is closed, and meanwhile, the eDRX cycle of the module is set. After initialization, the M5311 module is connected with the Internet of things platform through IP and ports. And when the data cache area has data, uploading the data in the cache area. After waiting for the completion of data transmission, checking whether new data exist, and if no data exist, enabling the module to enter a dormant state; if the data exists, repeating the previous step, and continuously sending the data information to the platform;
when a user issues a control instruction at an application layer, the wireless communication module 6 firstly detects whether the M5311 module is connected to the network, and after ensuring that equipment is connected to the network, checks whether the module can receive and transmit data in a high power consumption mode under high power consumption, and can only transmit data in low power consumption, if so, the module can receive the control instruction from the cloud platform, and controls an executing mechanism to operate, so that the temperature and the humidity of a test box are adjusted; if not, the terminal equipment cannot receive the control instruction issued by the user.
The flow of the device access module 9 comprises the following steps:
1: and (3) login: logging in the cloud platform by using the registered cloud account and password;
2: device access IoTDA: as an Internet of things platform for realizing equipment access;
3: creating a product: setting according to the type of the developed system and the effect of the developed product; the hardware terminal layer of the system selects an M5311 communication module so as to perform corresponding product creation and generate a product ID;
4: establishing a Profile file: the Profile file is a file for completing the setting of a product model and introducing the type and attribute control of equipment; the file defines the service type of the product, and the attribute control variable of the product can be set under the service type;
5: development of codec plug-ins: judging whether a coding and decoding plug-in is required to be developed according to the type of the uploaded data, wherein the types of data transmitted by different protocols are different; the CoAP protocol is selected in the system, the binary data stream is adopted in the protocol, the type of display data of the platform of the Internet of things is Json type, so that development of the coding and decoding plug-in unit is required to be completed in the platform of the Internet of things, the coding and decoding plug-in unit converts the data uploaded by the hardware terminal into Json type, and the uploaded data information can be checked in the platform;
6: and (3) adding equipment: registering real equipment in an Internet of things platform, and generally authenticating by using an identification code of the equipment; because the identification codes are unique, one identification code corresponds to one NB-IoT device, and after the device is successfully added, a unique device ID and a device key are generated;
7: the equipment is connected to the network: the generated equipment ID and the equipment key are used in control software of a terminal layer to realize the butt joint of equipment and an Internet of things platform; only if the equipment is successfully accessed to the network, the terminal layer can communicate with the cloud Internet of things platform;
8: the equipment is online: after the Internet of things platform is successfully accessed, the state of the equipment can be checked in the equipment management interface.
In the development interface, the encoding plug-in module 10 sets attribute types in Profile files corresponding to the Json types respectively through a newly added message button, the attribute types are mapped with each other, and the platform can be deployed in defined products immediately after generating plug-ins. In a subsequent development, the codec plug-in may be modified according to an increase or decrease of the system functions, and there are two interfaces for the codec plug-in of the coding plug-in module 10: stringDecode (Byte [ ]) and Byte [ ] Encode (String). Different codec interfaces correspond to different messages: the decoding corresponds to the uplink message, and the CoAP protocol is used for data transmission of the system, so that data information uploaded by the test box is stored in the protocol message layer, the interface is called for decoding, and the data is displayed in the Internet of things platform; the Encode corresponds to the downlink message, receives the control parameters issued by the application layer, calls the interface to finish data coding, assembles the control parameters into a CoAP message, and sends the CoAP message back to the test box.
The server module 11 selects a cloud server, the cloud server ECS can be directly invoked at any place without limitation of geographic location, and the memory size and the usage scale can be changed according to the service requirement without considering the problem of limited equipment.
In use, the server module 11 first performs environment configuration on the cloud server. The cloud server adopts a Linux system, installs a MySQL database and a Tomcat application server, configures JDK, python3 and other running environments, and simultaneously sets a security group interface. The security group interface is a function which a developer can realize according to specific needs of the system, and defines different access connections to prepare for receiving and transferring data. The set rules are equivalent to an intranet firewall, and can protect cloud servers in the same VPN from hackers or computer viruses. The whole process is set by using remote control software Xshell and Xftp, so that development difficulty is reduced. Secondly, after the configuration of the server is completed, in order to facilitate the access of the user, the public network IP can be set. The elastic public network IP is an independent IP address applied for, the IP is bound on the cloud server, and after the security group configuration rule is adopted, only a specific IP address can be set to be allowed to be remotely connected with the cloud server, so that communication between the cloud server and the Internet is realized. A user can log in the cloud server in a browser mode by using any computer or intelligent communication equipment, so that a management and control interface for logging in the test box at any time is realized
The front end of the application layer module 8 is mainly designed as a graphical interface, communication is established with the rear end, data of the rear end are read and displayed in the interface, and visual operation is carried out on the data; the control instruction issued by the user in the webpage interface can be forwarded to the back end, so that the remote control of the user on the terminal equipment is realized. The front end uses JSP technology under the configuration of a Bootstrap framework and a Jquery library according to JavaScript+HTML+CSS language, and utilizes HTML language to write a dynamic webpage interface meeting remote control of a test box; writing CSS language to design webpage styles; and setting an interface of data interaction according to the JavaScript. The back end of the application layer module 8 carries out logic control to realize the connection and data transmission of the model and the database. The back end can be connected and communicated with the cloud platform, receives data forwarded by the cloud platform and stores the data in a database server; and the communication is carried out with the front end, the request sent by the front end is received, and the data is forwarded to the front end according to the content of the request. The back-end development is based on the MVC architecture, and the back-end is connected with the MySQL database through a JDBC driver under the MVC architecture.
According to the invention, the module in the Internet of things platform module 7 summarizes the defects of the test box in the aspect of remote monitoring according to the Internet of things technology and the development current situation of the intelligent test box, so that a remote control system for designing the test box based on the Internet of things is provided. The hardware design of the system is mainly the design of a terminal layer. The data acquisition and wireless transmission are mainly realized in the terminal layer. The hardware design introduces a main control module, a power supply module, a signal input module, a signal output module and a wireless transmission module, and the corresponding circuit design is completed; the temperature of the dry bulb and the wet bulb in the PT100 temperature sensor is adopted, the corresponding humidity is calculated, the collected data is transmitted to the cloud platform through the NB-IoT wireless communication module and the CoAP protocol, meanwhile, the control parameters forwarded by the cloud platform can be received, the whole system can be controlled through the application layer module 8 in the use process, profile files and encoding and decoding plug-ins are designed in the cloud platform, and the data uploaded by the test box are received and displayed in the cloud platform in real time. The design of the data forwarding and rule engine is completed, communication with the cloud server is realized, the control instruction issued by the application layer is received, and the platform can push alarm information when the uploaded data is abnormal, so that the safety of the whole system is improved, the loss caused by human negligence is avoided, and the safety of the whole system is further ensured.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a remote management and control system of constant temperature and humidity test box based on thing networking, includes start module (1), parameter acquisition module (2), data input module (3), temperature and humidity control output module (4), relay module (5), wireless communication module (6), thing networking platform module (7), application layer module (8), equipment access module (9), coding plug-in components module (10) and server module (11), its characterized in that: the output of start module (1) is connected with the input of parameter acquisition module (2), the output of parameter acquisition module (2) is connected with the input of data input module (3), the output of data input module (3) is connected with the input of temperature and humidity control output module (4), the output of temperature and humidity control output module (4) is connected with the input of relay module (5), the output of relay module (5) is connected with the input of wireless communication module (6), the output of wireless communication module (6) is connected with the input of thing networking platform module (7), the output of thing networking platform module (7) is connected with the input of application layer module (8).
2. The remote control system of the constant temperature and humidity test box based on the internet of things of claim 1, wherein: the device comprises an Internet of things platform module (7), and is characterized in that an equipment access module (9), a coding plug-in module (10) and a server module (11) are arranged in the Internet of things platform module (7), and the integral output ends of the equipment access module (9), the coding plug-in module (10) and the server module (11) are connected with the input end of the Internet of things platform module (7).
3. The remote control system of the constant temperature and humidity test box based on the internet of things of claim 1, wherein: the parameter acquisition module (2) adopts a PT100 temperature sensor based on a platinum resistor, and the acquisition range of the temperature is-200 ℃ to +850 ℃; the principle of the temperature sensor for collecting the ambient temperature is that according to the thermal effect of the resistor, a constant current mode is generally adopted, and when current flows through the resistor, the voltage of the resistor rises or falls regularly, so that different corresponding resistance values at different temperatures can be obtained;
the data input module (3) is designed with 8 paths of inputs for feeding back the operation state of the test box, each path of input is controlled by the TLP291 chip, the TLP291 chip is a photoelectric coupler, and in the operation process of the test box, the operation state of the executing mechanism is used as DI input and fed back to the main control chip, so that the main control chip can conveniently judge the working mode of the executing mechanism.
4. The remote control system of the constant temperature and humidity test box based on the internet of things of claim 1, wherein: the temperature and humidity control output module (4) adjusts pulse width through PWM technique and is used as the input interface of TLP291 chip, and MCU_PID2 port is connected to the singlechip, and PID2 port connection peripheral hardware can realize the control to actuating mechanism such as compressor, mainly includes: the start-stop state of the test box and the working time of the executing mechanism are controlled, so that the adjustment of temperature and humidity is realized;
the relay module (5) is a G5NB-1A-E-24VDC relay, 10 relays are designed to operate in cooperation with a control output circuit, and two ULN2003 chips are designed in the system to drive the relay to work.
5. The remote control system of the constant temperature and humidity test box based on the internet of things of claim 1, wherein: the wireless communication module (6) completes a transmission process through a CoAP protocol based on a UDP channel, the cloud platform of the Internet of things is used as a Server, the terminal test box is used as a Client, and the CoAP Server address provided by the cloud platform of the Internet of things is used as a Client: a15f2108c2.iot-caps. Cn-north-4.myhuaweiciloud. Com port: 5683, completing communication connection, establishing Socket connection between the M5311 module and the base station, closing PSM mode after the equipment is connected to the network, and setting module eDRX period.
6. The remote control system of the constant temperature and humidity test box based on the internet of things of claim 1, wherein: the process of the device access module (9) comprises the following steps:
(1) logging in, namely logging in a cloud platform by using a well-registered cloud account and a well-registered password;
(2) the device accesses the IoTDA as an Internet of things platform for realizing the device access;
(3) creating a product, namely setting according to the type of the developed system and the effect of developing the product, selecting an M5311 communication module by a hardware terminal layer of the system, creating the corresponding product and generating a product ID;
(4) establishing a Profile file, wherein the Profile file is a file for completing the setting of a product model and introducing the type and attribute control of equipment, the service type of the product is defined in the file, and the attribute control variable of the product can be set under the service type;
the system selects a CoAP protocol, wherein the protocol adopts binary data stream, the type of display data of an Internet of things platform is Json type, so that the development of the encoding and decoding plugin is required to be completed in the Internet of things platform, the encoding and decoding plugin converts the data uploaded by a hardware terminal into Json type, and the uploaded data information can be checked in the platform;
(6) registering the real equipment in the Internet of things platform, and generally authenticating by using the identification code of the equipment, wherein one identification code corresponds to one NB-IoT equipment because of the uniqueness of the identification code, and the equipment generates a unique equipment ID and a unique equipment key after the equipment is successfully added;
(7) the equipment is connected with the network, namely the generated equipment ID and the equipment key are used in control software of a terminal layer to realize the butt joint of the equipment and the platform of the Internet of things, and the terminal layer can communicate with the platform of the Internet of things only if the equipment is successfully connected with the network;
(8) after the equipment is online and successfully accessed into the Internet of things platform, the state of the equipment can be checked in the equipment management interface.
7. The remote control system of the constant temperature and humidity test box based on the internet of things of claim 1, wherein: in the development interface, the coding plug-in module (10) respectively sets attribute types in Profile files corresponding to Json types through a newly added message button, the attribute types are mutually mapped, and the platform can be immediately deployed in defined products after generating plug-ins.
8. The remote control system of the constant temperature and humidity test box based on the internet of things of claim 1, wherein: the server module (11) selects a cloud server, the cloud server ECS can be directly invoked at any place without limitation of geographic position, and the memory size and the use scale can be changed according to service requirements without considering the problem of equipment limitation.
9. The remote control system of the constant temperature and humidity test box based on the internet of things of claim 1, wherein: when the cloud server is used, firstly, the cloud server is subjected to environment configuration, a Linux system is adopted by the cloud server, a MySQL database and a Tomcat application server are installed, JDK, python3 and other running environments are configured, and meanwhile, a security group interface is set.
10. The remote control system of the constant temperature and humidity test box based on the internet of things of claim 1, wherein: the front end of the application layer module (8) is mainly designed as a graphical interface, communication is established with the back end, data of the back end are read and displayed in the interface, and visual operation is carried out on the data.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109639830A (en) * | 2019-01-17 | 2019-04-16 | 南京邮电大学 | Building temperature and humidity monitoring system based on NB-IoT and the monitoring method using the system |
| CN110392101A (en) * | 2019-07-12 | 2019-10-29 | 芜湖职业技术学院 | Multiple terminals intelligent home control system based on cloud platform |
| CN114137858A (en) * | 2020-09-03 | 2022-03-04 | 浙江正泰电器股份有限公司 | Remote monitoring system and Internet of things electromagnetic relay thereof |
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