Valve wireless measurement and control method and system based on cloud SCADA

Abstract

The present invention provides a valve wireless measurement and control method and system based on cloud SCADA, belonging to the field of process control technology. It is used to monitor and control an industrial valve with an actuator, including: a LORA monitoring and control device that can be electrically connected to the actuator of the valve, a LORA base station, a SCADA cloud processing center and a user terminal. By using the Internet of Things technology, according to the Modbus protocol, the mutual conversion between the electrical signal and the working status information or valve control information based on the communication protocol is realized, and based on the LORA communication technology, the communication of the working status information or valve control information between the cloud SCADA server and the valve is realized, thereby providing a universal control valve modification method and system with low modification cost, which has the characteristics of long distance, low power consumption, multi-node and low cost, and can reduce operating costs and reduce safety risks.

Description

Technical Field

[0001] The present invention belongs to the technical field of process control, and in particular relates to a valve wireless measurement and control method and a measurement and control system based on cloud SCADA. Background Art

[0002] Industrial valves have functions such as controlling fluid on and off, regulating fluid pressure, and changing the direction of fluid flow in the pipeline system. The actuators for controlling valves are pneumatic and electric. Traditionally, industrial valves are mostly controlled by bus, forming centralized control methods such as DCS control systems, PLC control systems, and FCS control systems that use wired transmission. However, the bus control method not only costs a lot of money to purchase auxiliary facilities such as cables, wire racks, control cabinets, and I / O, but also has troublesome wiring, long time consumption, high labor, strong professionalism, and complex maintenance. In some special places, such as high temperature and high corrosion places, cables are exposed for a long time, which can easily cause cable aging and cause valves to be out of control.

[0003] The rapid development of Internet of Things technology has provided convenience for solving this problem. An electric actuator network measurement and control system provided in the prior art includes a data transmission circuit, a cloud server and a monitoring computer. The UART interface is used to communicate with the UART of the electric actuator main control unit via a serial port, and the data collection and data interaction of the equipment are completed with the electric actuator main control board through a TTL level. Although this method realizes wireless control of the electric actuator, the UART interface has great limitations. A large number of valve actuators do not have a UART interface. If a UART interface needs to be added, a high modification cost will be required. Summary of the invention

[0004] In view of this, the present invention provides a valve wireless measurement and control system based on cloud SCADA to solve the technical problems of poor versatility and high transformation cost in the process of realizing data interaction using UART interface in the prior art.

[0005] The present invention also provides a valve wireless measurement and control method based on cloud SCADA.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A valve wireless measurement and control system based on cloud SCADA, used for monitoring and controlling industrial valves with actuators, comprising: a LORA monitoring and control device electrically connected to the valve actuator, a LORA base station, a SCADA cloud processing center and a user terminal;

[0008] The LORA monitoring and control device is used to obtain a working state signal reflecting the working condition of the valve from the actuator of the valve, and based on the Modbus protocol, convert the working state signal into valve working state information, and send the valve working state information to the LORA base station in a wireless form. The LORA monitoring and control device is also used to receive valve control information based on the Modbus protocol that is adapted and broadcasted by the LORA base station, convert the valve control information into an execution signal, and transmit the execution signal to the actuator of the valve, so that the actuator controls the valve operation;

[0009] The LORA base station is used to receive the valve working status information in wireless form, and transmit the valve working status information to the SCADA cloud processing center. The LORA base station is also used to receive the valve control information transmitted by the SCADA cloud processing center, and send the valve control information in a broadcast form;

[0010] The SCADA cloud processing center communicates with the LORA base station through a network. The SCADA cloud processing center is used to receive valve working status information, and parse the received valve working status information into valve status data and store it; the SCADA cloud processing center is also used to receive valve control instruction data sent by the user terminal, and based on the Modbus protocol, convert the received valve control instruction data into valve control information, and transmit the valve control information to the LORA base station;

[0011] The user terminal is connected to the SCADA cloud processing center via a network. The user terminal is used to obtain stored valve status data from the SCADA cloud processing center for reference by monitoring personnel using the user terminal. The user terminal is also used to respond to operations performed by monitoring personnel based on the valve status data, generate corresponding valve control instruction data, and provide the valve control instruction data to the SCADA cloud processing center.

[0012] Preferably, the LORA monitoring and control device includes: a signal conversion unit and a communication unit, the signal conversion unit is electrically connected to the valve actuator, used to obtain a working status signal reflecting the working condition of the valve from the valve actuator, and based on the Modbus protocol, converts the working status signal into valve working status information, and outputs it, the signal conversion unit is also used to receive valve control information based on the Modbus protocol transmitted by the communication unit, converts the valve control information into an execution signal, and transmits the execution signal to the valve actuator; the communication unit is electrically connected to the signal conversion unit, the communication unit is used to receive the valve working status information output by the signal conversion unit, and send it to the LORA base station in a wireless form, the communication unit is also used to receive the valve control information based on the Modbus protocol that is adapted and broadcasted by the LORA base station, and output the valve control information.

[0013] Preferably, the LORA base station communicates with the SCADA cloud processing center based on GPRS communication protocol or 2G / 3G / 4G / 5G / 6G protocol.

[0014] Preferably, the SCADA cloud processing center includes a valve monitoring module and a valve control module, the valve monitoring module is used to receive the valve working status information transmitted by the LORA base station, and parse the received valve working status information into valve status data and store it; the valve control module is used to receive the valve control instruction data sent by the user terminal, and based on the Modbus protocol, convert the received valve control instruction data into valve control information, and transmit the valve control information to the LORA base station.

[0015] Preferably, the valve monitoring module includes a data receiving unit, a first data conversion unit and a storage unit. The data receiving unit communicates with the LORA base station through a network. The data receiving unit is used to receive valve working status information transmitted by the LORA base station. The first data conversion unit is used to parse the received valve working status information into valve status data. The storage unit is used to store the valve status data.

[0016] Preferably, the valve control module includes an instruction receiving module, a second data conversion unit and an information output module. The instruction receiving module communicates with the user terminal through a network. The instruction receiving module is used to respond to the operations performed by the monitoring personnel according to the valve status data to generate corresponding valve control instruction data. The second data conversion unit is used to convert the received valve control instruction data into valve control information based on the Modbus protocol. The information output module communicates with the LORA base station through a network. The information output module is used to transmit the valve control information to the LORA base station in a wireless form.

[0017] Preferably, the valve control module also includes a fault judgment unit, a reset information acquisition unit and a reset information output unit. The fault judgment unit is used to compare the received valve working status information with the pre-stored fault status information to determine whether the current valve is in a fault state, and output the judgment result; the reset information acquisition unit is used to obtain the valve status data at the previous moment from the storage unit according to the received judgment result as valve reset instruction information; the reset information output unit communicates with the LORA base station through the network, and the reset information output unit is used to transmit the received valve reset instruction data to the LORA base station in wireless form.

[0018] A valve wireless measurement and control method based on cloud SCADA includes a process of monitoring the working state of the valve and a process of controlling the valve. The process of monitoring the working state of the valve includes the following steps:

[0019] a1. Obtaining a working analog signal reflecting the working condition of the valve;

[0020] a2. According to the Modbus protocol, the acquired working analog signal is converted into valve working status information that can be transmitted wirelessly, and according to the LORA protocol, the valve working status information is forwarded via the LORA base station and transmitted to the SCADA cloud server;

[0021] a3 based on SCADA cloud server, the valve working status information is converted into valve status data, and the valve status data is stored;

[0022] a4 obtain valve status data stored in the SCADA cloud server for reference by monitoring personnel;

[0023] The control process of the valve comprises the following steps:

[0024] b1. Respond to the input operation performed by the monitoring personnel after referring to the valve status data, and generate corresponding valve control instruction data;

[0025] b2. Sending the valve control instruction data to the SCADA cloud server via the network; b3. Based on the SCADA cloud server, according to the Modbus protocol, the valve control instruction data is converted into valve control information, and according to the LORA protocol, the valve control information is wirelessly output to the LORA base station, and is broadcasted by the LORA base station;

[0026] b4. Receiving the adapted valve control information, converting the valve control information into an execution signal, and providing the execution signal to the valve actuator so that the actuator controls the valve to work.

[0027] Preferably, the control process of the valve further comprises the following steps:

[0028] c1. Get valve working status information;

[0029] c2. The valve working status information and the preset valve fault status information are compared to determine whether the valve is in a fault state;

[0030] c3 when it is determined that the valve is in a faulty state, obtain the valve status data stored in the SCADA cloud server at the last moment, and the valve status data as the valve reset control information;

[0031] c4. According to the LORA protocol, the valve reset control information is wirelessly output to the LORA base station, and is broadcasted by the LORA base station;

[0032] c5. Receiving the adapted valve reset control information, converting the valve reset control information into a reset execution signal, and providing the reset execution signal to the valve actuator so that the actuator controls the valve to restore the state before the fault.

[0033] Preferably, the working analog signal is a voltage signal or a current signal; the execution signal is a voltage signal or a current signal; and the reset execution signal is a voltage signal or a current signal.

[0034] The present invention adopts the above technical solution, and its beneficial effects are: utilizing the Internet of Things technology, according to the Modbus protocol, to realize the mutual conversion between electrical signals and working status information or valve control information based on the communication protocol, and based on the LORA communication technology, to realize the communication of working status information or valve control information between the cloud SCADA server and the valve, thereby providing a universal, low-cost control valve modification method and system, which has the characteristics of long distance, low power consumption, multi-node, and low cost, and can reduce operating costs and reduce safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural diagram of the valve wireless measurement and control system based on cloud SCADA.

[0036] Figure 2 This is the circuit connection diagram of the LORA monitoring and control device.

[0037] Figure 3 It is the functional module diagram of the SCADA cloud processing center.

[0038] Figure 4 This is the working logic diagram of the valve wireless measurement and control method based on cloud SCADA.

[0039] In the figure: a valve wireless measurement and control system 10 based on cloud SCADA, an actuator 11, a LORA monitoring and control device 100, a signal conversion unit 110, a valve status information input terminal 111, a valve control information output terminal 112, a first signal interaction terminal 113, a power input terminal 114, a second signal interaction terminal 121, a power output terminal 122, a communication unit 120, a power supply device 130, a LORA base station 200, a SCADA cloud processing center 300, a valve monitoring module 310, a data receiving unit 311, a first data conversion unit 312, a storage unit 313, a valve control module 320, an instruction receiving module 321, a second data conversion unit 322, an information output module 323, a fault judgment unit 324, a reset information acquisition unit 325, a reset information output unit 326, and a user terminal 400. DETAILED DESCRIPTION

[0040] Please see Figure 1 In a specific embodiment of the present invention, a valve wireless measurement and control system 10 based on cloud SCADA is provided, which is used to monitor and control an industrial valve with an actuator 11, including: a LORA monitoring and control device 100 that can be electrically connected to the valve actuator 11, a LORA base station 200, a SCADA cloud processing center 300 and a user terminal 400.

[0041] The LORA monitoring and control device 100 is used to obtain a working state signal reflecting the working condition of the valve from the actuator 11 of the valve, and based on the Modbus protocol, convert the working state signal into valve working state information, and send the valve working state information in a wireless form to the LORA base station 200. The LORA monitoring and control device 100 is also used to receive valve control information based on the Modbus protocol that is adapted and broadcasted by the LORA base station 200, and convert the valve control information into an execution signal, and transmit the execution signal to the actuator 11 of the valve, so that the actuator 11 controls the operation of the valve.

[0042] The LORA base station 200 is used to receive the valve working status information in wireless form and transmit the valve working status information to the SCADA cloud processing center 300. The LORA base station 200 is also used to receive the valve control information transmitted by the SCADA cloud processing center 300 and send the valve control information in a broadcast form.

[0043] The SCADA cloud processing center 300 communicates with the LORA base station 200 through the network. The SCADA cloud processing center 300 is used to receive valve working status information, and parse the received valve working status information into valve status data and store it. The SCADA cloud processing center 300 is also used to receive valve control instruction data sent by the user terminal 400, and based on the Modbus protocol, convert the received valve control instruction data into valve control information, and transmit the valve control information to the LORA base station 200.

[0044] The user terminal 400 is connected to the SCADA cloud processing center 300 via a network. The user terminal 400 is used to obtain the stored valve status data from the SCADA cloud processing center 300 for reference by the monitoring personnel using the user terminal 400. The user terminal 400 is also used to respond to the operations made by the monitoring personnel based on the valve status data, generate corresponding valve control instruction data, and provide the valve control instruction data to the SCADA cloud processing center 300.

[0045] On the one hand, for example, the LORA monitoring and control device 100 is electrically connected to the actuator 11 of the valve, and the working state signal from the actuator 11 of the valve that can reflect the working condition of the valve is obtained by the LORA monitoring and control device 100. The working state signal can be a voltage signal or a current signal. For example, the working state signal is one of a 1-5V voltage signal, a -10-10V voltage signal, a 4-20mA current signal or a 0-20mA current signal. After the LORA monitoring and control device 100 obtains the working state signal, it converts the working state signal according to the Modbus protocol, that is, converts it into working state information that can be transmitted wirelessly. The working state information includes at least LORA frame code information, valve address information, target data information and check code information, and may also include basic information of the corresponding valve, such as valve range, accuracy, etc. The working state information is output by the LORA monitoring and control device 100 in a wireless form, forwarded by the LORA base station 200, and transmitted to the SCADA cloud processing center 300 in a wireless form. The SCADA cloud processing center 300 receives the working status information, parses the working status information according to the Modbus protocol, reads the target data information in the working status information, converts the target data information into valve status data, and stores it. The valve monitoring personnel access the SCADA cloud processing center 300 through the Internet through the user terminal 400, and obtains the above valve status data for reference by the monitoring personnel using the user terminal 400.

[0046] On the other hand, the valve monitoring personnel judges that the working state of a certain valve needs to be adjusted based on the valve status data obtained. At this time, the valve monitoring personnel inputs and forms the corresponding valve control instruction data through the user terminal 400, and the valve control instruction data is transmitted to the SCADA cloud processing center 300 through the network. The SCADA cloud processing center 300 obtains the valve control instruction data, and converts the valve control instruction data according to the Modbus protocol to form valve control information that can be transmitted wirelessly. The valve control information at least includes LORA frame code information, valve address information, target data information and check code information, so as to facilitate the corresponding LORA monitoring and control device 100 to adapt and identify. The SCADA cloud processing center 300 transmits the above valve control information to the LORA base station 200 in a wireless form, and the LORA base station 200 outputs it in a broadcast form. The corresponding LORA monitoring and control device 100 identifies and receives the valve address information according to the valve address information, and converts the valve control information into an execution signal, which can be a voltage signal or a current signal. For example, the working state signal is one of a 1-5V voltage signal, a -10-10V voltage signal, a 4-20mA current signal or a 0-20mA current signal. The corresponding LORA monitoring and control device 100 transmits the above-mentioned execution signal to the actuator 11 of the valve, so that the actuator 11 controls the valve to work, thereby making the valve reach the working state expected by the valve monitoring personnel.

[0047] Further, the LORA monitoring and control device 100 includes: a signal conversion unit 110 and a communication unit 120, wherein the signal conversion unit 110 is electrically connected to the valve actuator 11, and is used to obtain a working state signal reflecting the working condition of the valve from the valve actuator 11, and convert the working state signal into valve working state information based on the Modbus protocol, and output it. The signal conversion unit 110 is also used to receive valve control information based on the Modbus protocol transmitted by the communication unit 120, convert the valve control information into an execution signal, and transmit the execution signal to the valve actuator. The communication unit 120 is electrically connected to the signal conversion unit 110, and the communication unit 120 is used to receive the valve working state information output by the signal conversion unit 110, and send it to the LORA base station 200 in a wireless form. The communication unit 120 is also used to receive the valve control information based on the Modbus protocol that is adapted and sent by the LORA base station 200 in a broadcast form, and output the valve control information.

[0048] Specifically, the signal conversion unit 110 has a valve state information input terminal 111 and a valve control information output terminal 112. The valve state information input terminal 111 conducts the feedback loop of the actuator 11, and the valve control information output terminal 112 conducts the control loop of the actuator 11. On the one hand, the valve working state signal fed back by the feedback loop of the actuator 11 is input into the signal conversion unit 110 through the valve state information input terminal 111, and converted into valve state information according to the Modbus protocol. On the other hand, the valve control information based on the Modbus protocol issued by the SCADA cloud processing center 300 is input through the valve control information output terminal 112, and converted into a current or voltage signal that can be executed by the actuator 11, and input into the actuator 11 to control the valve action.

[0049] Specifically, the signal conversion unit 110 has a first signal interaction terminal 113, and the communication unit 120 has a second signal interaction terminal 121, and the second signal interaction terminal 121 is electrically connected to the first signal interaction terminal 113. For example, the second signal interaction terminal 121 is connected to the first signal interaction terminal 113 via an RS485 communication cable to achieve data interaction between the signal conversion unit 110 and the communication unit 120.

[0050] Specifically, the LORA monitoring and control device 100 also includes a power supply device 130 for powering the communication unit 120, and the power supply device 130 turns on the communication unit 120. The power supply device 130 can be a battery with an output of 3.6V, or an external 24V power supply to power the communication unit 120.

[0051] Specifically, the communication unit 120 has a power output terminal 122 , and the signal conversion unit 110 has a power input terminal 114 . The power input terminal 114 conducts to the power output terminal 122 to provide power for the signal conversion unit 110 to maintain normal operation.

[0052] The specific implementation process of the present invention is described below by way of example. For example, the signal conversion unit 110 may be a Modbus analog converter, which can convert a current or voltage signal into data information that satisfies the Modbus protocol, and can also convert data information that satisfies the Modbus protocol into a current or voltage signal. The communication unit 120 may be a LORA wireless module with a LORA wireless communication function, which has the characteristics of long distance, low power consumption, multiple nodes, and low cost.

[0053] Please also see Figure 2Taking the GEMÜ electric butterfly valve as an example, the valve input and output signals are both 4-20mA current signals. The I+, I- terminals are the control signal input of the valve, that is, the control loop; the O+, O- terminals are the feedback signal output of the valve, that is, the feedback loop; L, N are the power supply loop of the valve.

[0054] The LORA monitoring and control device 100 leads to a six-core cable, which are respectively a power line (the red line is connected to the positive pole of the external power supply, and the black line is connected to the negative pole of the external power supply), wherein the red line is connected to L, and the black line is connected to N (not shown in the attached figure); a valve status information input terminal 111 (for ease of understanding and distinction, including brown and white lines), wherein the brown line is connected to the O+ terminal of the valve, and the white line is connected to the O- terminal of the valve, so as to realize the execution signal converted by the LORA monitoring and control device 100 and the signal interaction of the actuator 11; and a valve control information output terminal 112 (for ease of understanding and distinction, including green and yellow lines), wherein the green line is connected to the I+ terminal of the valve, and the yellow line is connected to the I- terminal of the valve, so as to realize the data interaction between the working status signal of the valve and the LORA monitoring and control device 100.

[0055] Inside the LORA monitoring and control device 100, the signal conversion unit 110 has two analog signal input terminals IN2 and IN1 ⑦, ⑧, i.e., valve status information input terminal 111; GND common ground terminal ⑤; and control signal output terminal ⑥, i.e., valve control information output terminal 112. The specific wiring method of the signal conversion unit 110 is: the brown wire in the six-core cable is connected to ⑧, the green wire is connected to ⑥, and the white and yellow wires are connected to ⑤.

[0056] The RS485A / B terminal of the signal conversion unit 110, i.e., the first signal interaction terminal 113, is connected to the RS485+ / - terminal of the PCBA board of the communication unit 120 through an RS485 cable, i.e., connected to the second signal interaction terminal 121. The power supply device 130 is connected to the PCBA board power terminal of the communication unit 120, and the battery pack plug is inserted into the PCAB board power port to provide power.

[0057] For example, the working process of the valve wireless measurement and control system 400 based on cloud SCADA is as follows: the SCADA cloud processing center 300 sends an instruction to obtain valve opening data. For example, the SCADA cloud processing center 300 sends a read status data instruction: 010300000001840A (the instruction is an inquiry type, and the instruction is fixed), and the valve position feedback signal return value is 01 03 02 0B E0 BE FC, where 0B E0 is the valve position feedback data. The parsing process is as follows. The above data is converted into decimal data through the Modbus analog converter, and the value is y=3040. The formula I=y*K is used. The K value in this formula is defined by the valve manufacturer, and the K value of different manufacturers is different. For example, K is 20 / 4095, and the current value I is 14.84mA. Since the valve range is 0-100 and the output current is 4-20mA, the ratio is calculated as 6.25 using 100 / (20-4). 14.84*6.25=67.75 is consistent with the valve digital display value of 67. After analysis, the valve opening is displayed as 67 in the cloud SCADA.

[0058] For example, the SCADA cloud processing center 300 issues a command to control the valve to be fully closed as 01060078000009D3, then the LORA adapter unit 100 outputs a 4mA current signal to the valve actuator, and then the valve performs a closing operation. The fully open command is 01060078271013EF, then the LORA adapter unit 100 outputs a 20mA current signal to the valve actuator 11, and the valve performs an opening operation. For example, the half-open command is: 0106007813880485, then the LORA wireless adapter outputs a 12mA current signal, and so on. The above-mentioned valves include backflow preventers, pressure reducing valves, pressure relief valves, water supply valves, electric valves, flow control valves, etc. The LORA adapter unit 100 meets the explosion-proof requirements and complies with GB38361-2010 "General Requirements and Explosion-proof Standards for Explosive Environment Equipment", and can be used in explosion-proof areas such as petrochemicals.

[0059] Furthermore, the LORA base station 200 has a wireless communication device, which is set based on the GPRS communication protocol or the 2G / 3G / 4G / 5G / 6G protocol, preferably, based on the 4G / 5G / 6G protocol, to achieve data interaction with the SCADA cloud processing center 300, improve the data transmission rate, and enhance the stability of data transmission.

[0060] Please see Figure 3Further, the SCADA cloud processing center 300 includes a valve monitoring module 310 and a valve control module 320. The valve monitoring module 310 is used to receive the valve working state information transmitted by the LORA base station 200, and parse the received valve working state information into valve state data and store it. The valve control module 320 is used to receive the valve control instruction data sent by the user terminal 400, and based on the Modbus protocol, convert the received valve control instruction data into valve control information, and transmit the valve control information to the LORA base station 200.

[0061] Furthermore, the valve monitoring module 310 includes a data receiving unit 311, a first data conversion unit 312 and a storage unit 313. The data receiving unit 311 communicates with the LORA base station 200 through a network. The data receiving unit 312 is used to receive valve working status information transmitted by the LORA base station 200. The first data conversion unit 312 is used to parse the received valve working status information into valve status data. The storage unit 313 is used to store the valve status data.

[0062] Furthermore, the valve control module 320 includes an instruction receiving module 321, a second data conversion unit 322 and an information output module 323. The instruction receiving module 321 communicates with the user terminal 400 through a network. The instruction receiving module 321 is used to respond to the operations performed by the monitoring personnel according to the valve status data, and generate corresponding valve control instruction data. The second data conversion unit 322 is used to convert the received valve control instruction data into valve control information based on the Modbus protocol. The information output module 323 communicates with the LORA base station 200 through a network. The information output module 323 is used to transmit the valve control information to the LORA base station 200 in a wireless form.

[0063] Furthermore, the valve control module 320 also includes a fault judgment unit 324, a reset information acquisition unit 325 and a reset information output unit 326. The fault judgment unit 324 is used to compare the received valve working state information with the pre-stored fault state information to determine whether the current valve is in a fault state, and output the judgment result. The reset information acquisition unit 325 is used to obtain the valve state data of the previous moment from the storage unit 313 according to the received judgment result as valve reset instruction information. The reset information output unit 326 communicates with the LORA base station 200 through the network, and the reset information output unit 326 is used to transmit the received valve reset instruction data to the LORA base station 200 in a wireless form.

[0064] Please also see Figure 4 That is, the data receiving unit 311 continuously receives the valve working state information transmitted by the LORA base station 200, and first passes through the fault judgment unit 324 to compare with the valve fault information pre-stored in the fault judgment unit 324. If the valve working state information is not one of the pre-stored valve fault information, that is, the valve working state information is determined to be feedback information when the valve works normally, the valve working state information is input into the first data conversion unit 312. The first data conversion unit 312 parses the received valve working state information into valve state data and stores it in the storage unit 313. If the valve working state information is one of the pre-stored valve fault information, that is, the valve working state information is determined to be feedback information when the valve fails, the valve working state information is stopped from being input into the first data conversion unit 312, and the reset information acquisition unit 325 acquires the latest (i.e., the last moment) valve state data of the valve stored in the storage unit 313 as valve reset instruction information. The valve reset instruction information is transmitted to the LORA base station 200 in a wireless form through the reset information output unit 326, and is output in a broadcast form through the LORA base station 200. When the valve fault is eliminated and restored to normal, the LORA monitoring and control device 100 receives the valve reset instruction information, converts it into a reset instruction signal, and inputs it into the valve actuator 11, so that the valve is restored to the working state before the fault.

[0065] In a specific embodiment of the present invention, a valve wireless measurement and control method based on cloud SCADA is also provided, including a valve working state monitoring process and a valve control process, wherein the valve working state monitoring process includes the following steps:

[0066] a1. Obtaining a working analog signal reflecting the working condition of the valve;

[0067] a2. According to the Modbus protocol, the acquired working analog signal is converted into valve working status information that can be transmitted wirelessly, and according to the LORA protocol, the valve working status information is forwarded via the LORA base station and transmitted to the SCADA cloud server;

[0068] a3 based on SCADA cloud server, the valve working status information is converted into valve status data, and the valve status data is stored;

[0069] a4 obtain valve status data stored in the SCADA cloud server for reference by monitoring personnel;

[0070] The control process of the valve comprises the following steps:

[0071] b1. Responding to the input operation performed by the monitoring personnel after referring to the valve status data, the corresponding valve control instruction data is generated;

[0072] b2. Send the valve control command data to the SCADA cloud server via the network;

[0073] b3 based on SCADA cloud server, according to the Modbus protocol, the valve control command data is converted into valve control information, and according to the LORA protocol, the valve control information is wirelessly output to the LORA base station, and issued by the LORA base station in the form of a broadcast;

[0074] b4. Receiving the adapted valve control information, converting the valve control information into an execution signal, and providing the execution signal to the valve actuator so that the actuator controls the valve to work.

[0075] Furthermore, the control process of the valve further includes the following steps:

[0076] c1. Get valve working status information;

[0077] c2. The valve working status information and the preset valve fault status information are compared to determine whether the valve is in a fault state;

[0078] c3 when it is determined that the valve is in a faulty state, obtain the valve status data stored in the SCADA cloud server at the last moment, and the valve status data as the valve reset control information;

[0079] c4. According to the LORA protocol, the valve reset control information is wirelessly output to the LORA base station, and is broadcasted by the LORA base station;

[0080] c5. Receiving the adapted valve reset control information, converting the valve reset control information into a reset execution signal, and providing the reset execution signal to the valve actuator so that the actuator controls the valve to restore the state before the fault.

[0081] Furthermore, the working analog signal is a voltage signal or a current signal; the execution signal is a voltage signal or a current signal; and the reset execution signal is a voltage signal or a current signal.

[0082] It should be noted that the above-mentioned valve includes at least one of an electric valve, a pneumatic valve and a hydraulic valve. Of course, the present invention is not limited to the wireless measurement and control of control valves, but can also be extended to the fields of motor control.

[0083] What is disclosed above is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A valve wireless measurement and control system based on cloud SCADA, used to monitor and control industrial valves with actuators, characterized in that: include: LORA monitoring and control devices, LORA base stations, SCADA cloud processing centers and user terminals that can be electrically connected to the valve actuators; The LORA monitoring and control device is used to obtain a working status signal reflecting the working condition of the valve from the actuator of the valve, and based on the Modbus protocol, convert the working status signal into valve working status information, and send the valve working status information to the LORA base station in a wireless form. The LORA monitoring and control device is also used to receive valve control information based on the Modbus protocol that is adapted and broadcasted by the LORA base station, convert the valve control information into an execution signal, and transmit the execution signal to the actuator of the valve, so that the actuator controls the valve to work; The LORA base station is used to receive the valve working status information in wireless form, and transmit the valve working status information to the SCADA cloud processing center. The LORA base station is also used to receive the valve control information transmitted by the SCADA cloud processing center, and send the valve control information in a broadcast form; The SCADA cloud processing center communicates with the LORA base station through a network. The SCADA cloud processing center is used to receive valve working status information, and parse the received valve working status information into valve status data and store it; the SCADA cloud processing center is also used to receive valve control instruction data sent by the user terminal, and based on the Modbus protocol, convert the received valve control instruction data into valve control information, and transmit the valve control information to the LORA base station. The valve control information at least includes LORA frame code information, valve address information, target data information and check code information, so that the corresponding LORA monitoring and control device receives the adapted valve control information according to the valve address information; The user terminal is connected to the SCADA cloud processing center via a network. The user terminal is used to obtain stored valve status data from the SCADA cloud processing center for reference by monitoring personnel using the user terminal. The user terminal is also used to respond to operations performed by monitoring personnel based on the valve status data, generate corresponding valve control instruction data, and provide the valve control instruction data to the SCADA cloud processing center.

2. The valve wireless measurement and control system based on cloud SCADA as claimed in claim 1 is characterized in that: The LORA monitoring and control device comprises: a signal conversion unit and a communication unit; The signal conversion unit is electrically connected to the actuator of the valve, and is used to obtain a working state signal reflecting the working condition of the valve from the valve actuator, and based on the Modbus protocol, convert the working state signal into valve working state information that can be wirelessly transmitted, and output it. The signal conversion unit is also used to receive valve control information based on the Modbus protocol transmitted by the communication unit, convert the valve control information into an execution signal, and transmit the execution signal to the actuator of the valve; The communication unit is electrically connected to the signal conversion unit, and is used to receive the valve working status information output by the signal conversion unit and send it to the LORA base station in a wireless form. The communication unit is also used to receive the valve control information based on the Modbus protocol that is adapted and broadcasted by the LORA base station, and output the valve control information.

3. The valve wireless measurement and control system based on cloud SCADA as described in claim 1 or 2, characterized in that: The LORA base station communicates with the SCADA cloud processing center based on the GPRS communication protocol or the 2G / 3G / 4G / 5G / 6G protocol.

4. The valve wireless measurement and control system based on cloud SCADA as claimed in claim 3 is characterized in that: The SCADA cloud processing center includes a valve monitoring module and a valve control module. The valve monitoring module is used to receive the valve working status information transmitted by the LORA base station, and parse the received valve working status information into valve status data and store it; the valve control module is used to receive the valve control instruction data sent by the user terminal, and based on the Modbus protocol, convert the received valve control instruction data into valve control information, and transmit the valve control information to the LORA base station.

5. The valve wireless measurement and control system based on cloud SCADA as claimed in claim 4 is characterized in that: The valve monitoring module includes a data receiving unit, a first data conversion unit and a storage unit. The data receiving unit communicates with the LORA base station through a network. The data receiving unit is used to receive valve working status information transmitted by the LORA base station. The first data conversion unit is used to parse the received valve working status information into valve status data. The storage unit is used to store the valve status data.

6. The valve wireless measurement and control system based on cloud SCADA as claimed in claim 5, characterized in that: The valve control module includes an instruction receiving module, a second data conversion unit and an information output module. The instruction receiving module communicates with the user terminal through a network. The instruction receiving module is used to respond to the operations performed by the monitoring personnel based on the valve status data to generate corresponding valve control instruction data. The second data conversion unit is used to convert the received valve control instruction data into valve control information based on the Modbus protocol. The information output module communicates with the LORA base station through a network. The information output module is used to transmit the valve control information to the LORA base station in a wireless form.

7. The valve wireless measurement and control system based on cloud SCADA as claimed in claim 6 is characterized in that: The valve control module also includes a fault judgment unit, a reset information acquisition unit and a reset information output unit. The fault judgment unit is used to compare the received valve working status information with the pre-stored fault status information to determine whether the current valve is in a fault state and output the judgment result; the reset information acquisition unit is used to obtain the valve status data at the previous moment from the storage unit according to the received judgment result as valve reset instruction information; the reset information output unit communicates with the LORA base station through the network, and the reset information output unit is used to transmit the received valve reset instruction data to the LORA base station in wireless form.

8. A valve wireless measurement and control method based on cloud SCADA, using the valve wireless measurement and control system based on cloud SCADA as described in any one of claims 1 to 7, for monitoring and controlling an industrial valve with an actuator, the method comprising a process of monitoring the working state of the valve and a process of controlling the valve, characterized in that: The process of monitoring the working state of the valve comprises the following steps: a1. Obtaining a working analog signal reflecting the working condition of the valve; a2. According to the Modbus protocol, the acquired working analog signal is converted into valve working status information, and according to the LORA protocol, the valve working status information is forwarded through the LORA base station and transmitted to the SCADA cloud server; a3 based on SCADA cloud server, the valve working status information is converted into valve status data, and the valve status data is stored; a4 obtain valve status data stored in the SCADA cloud server for reference by monitoring personnel; The control process of the valve comprises the following steps: b1. Responding to the input operation performed by the monitoring personnel after referring to the valve status data, the corresponding valve control instruction data is generated; b2. The valve control command data is sent to the SCADA cloud server via the network; b3 based on SCADA cloud server, according to the Modbus protocol, the valve control command data is converted into valve control information capable of wireless transmission, and according to the LORA protocol, the valve control information is wirelessly output to the LORA base station, and the LORA base station is issued in the form of a broadcast; b4. Receive the adapted valve control information according to the valve address information, convert the valve control information into an execution signal, and provide the execution signal to the valve actuator so that the actuator controls the valve to work.

9. The valve wireless measurement and control method based on cloud SCADA as claimed in claim 8, characterized in that: The control process of the valve also includes the following steps: c1. Get valve working status information; c2. The valve working status information and the preset valve fault status information are compared to determine whether the valve is in a fault state; c3 when it is determined that the valve is in a faulty state, obtain the valve status data stored in the SCADA cloud server at the last moment, and the valve status data as the valve reset control information; c4. According to the LORA protocol, the valve reset control information is wirelessly output to the LORA base station, and is broadcasted by the LORA base station; c5. Receiving the adapted valve reset control information, converting the valve reset control information into a reset execution signal, and providing the reset execution signal to the valve actuator so that the actuator controls the valve to restore the state before the fault.

10. The valve wireless measurement and control method based on cloud SCADA as claimed in claim 9, characterized in that: The working simulation signal is a voltage signal or a current signal; the execution signal is a voltage signal or a current signal; and the reset execution signal is a voltage signal or a current signal.

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