CN112783040A - Distributed high-pressure nitrogen making equipment control system - Google Patents
Distributed high-pressure nitrogen making equipment control system Download PDFInfo
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- CN112783040A CN112783040A CN202011622053.9A CN202011622053A CN112783040A CN 112783040 A CN112783040 A CN 112783040A CN 202011622053 A CN202011622053 A CN 202011622053A CN 112783040 A CN112783040 A CN 112783040A
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- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
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Abstract
The invention relates to a distributed control system of high-pressure nitrogen making equipment, which comprises: a central console; the communication module is in communication connection with the central console; the at least two high-pressure nitrogen making devices are respectively connected with the communication module in a wired or wireless way; wherein, the central console is configured to display the operation states of the plurality of high-pressure nitrogen generation devices in a centralized manner through the communication module and send control instructions. According to the method and the device, the data content of the equipment state is compressed, the number of bytes of transmitted data is reduced, and the time for the communication module to receive the equipment state data can be reduced, so that whether further adjustment and instruction issuing are needed can be judged in time, and the quality and the efficiency of nitrogen gas manufacturing are improved.
Description
Technical Field
The invention relates to the technical field of remote control, in particular to a distributed control system of high-pressure nitrogen making equipment.
Background
The high-pressure nitrogen making equipment generally comprises an air compressor, a nitrogen making machine, a nitrogen booster and the like, and nitrogen in the air is separated by utilizing a fiber membrane module, so that the high-pressure nitrogen making equipment is a low-cost and high-efficiency nitrogen making mode. The high-pressure nitrogen making equipment is widely applied to the fields of coal, chemical industry, electronics, automobiles, pharmacy, food, literary insurance equipment and the like.
When a plurality of high-pressure nitrogen making devices work simultaneously, workers need to check, record, adjust and the like each high-pressure nitrogen making device. However, when a plurality of high-pressure nitrogen generation facilities are distributed relatively dispersedly, a large amount of manpower is consumed to complete the above work, and the high-pressure nitrogen generation facilities have low work efficiency.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a distributed control system of high-pressure nitrogen making equipment, which comprises: a central console; the communication module is in communication connection with the central console; the at least two high-pressure nitrogen making devices are respectively connected with the communication module in a wired or wireless way; wherein, the central console is configured to display the operation states of the plurality of high-pressure nitrogen generation devices in a centralized manner through the communication module and send control instructions.
In the distributed control system for high-voltage nitrogen production equipment, the communication mode between the central console and the communication module is high-speed bus connection.
The distributed control system for high-pressure nitrogen making equipment as described above further comprises: and the third-party equipment is in communication wireless connection with the communication module, and a user can remotely check and control the plurality of high-pressure nitrogen making equipment on the third-party equipment.
The distributed high-voltage nitrogen making equipment control system adopts a customized communication protocol to communicate between the communication module and the plurality of high-voltage nitrogen making equipment, wherein the data packet delay of the state data is less than 500 ms.
In the distributed control system for high-pressure nitrogen generation equipment, in the customized communication protocol, the data packet format of the status data at least includes: the device comprises a frame header, a data length, data content and check bits, wherein the data content is subjected to compression processing.
In the distributed control system for high-pressure nitrogen plant, the data content is compressed by a residual value deviating from the threshold value.
The distributed high-pressure nitrogen plant control system as described above, wherein the data packet is compressed in such a manner that the parameter deviating from the last transmitted parameter by less than a predetermined range is not transmitted.
The distributed high-pressure nitrogen plant control system as described above, wherein the central console is capable of controlling up to 32 high-pressure nitrogen plants.
In the distributed control system for the high-pressure nitrogen making equipment, the control instruction in the custom protocol is not compressed.
In the distributed control system for the high-pressure nitrogen making equipment, the control command in the custom protocol is a standard control command of the high-pressure nitrogen making equipment.
According to the method and the device, the data content of the equipment state is compressed, the number of bytes of transmitted data is reduced, and the time for the communication module to receive the equipment state data can be reduced, so that whether further adjustment and instruction issuing are needed can be judged in time, and the quality and the efficiency of nitrogen gas manufacturing are improved.
Drawings
Preferred embodiments of the present invention will now be described in further detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a high pressure nitrogen plant module according to one embodiment of the present invention;
FIG. 2 is a diagram of a high pressure nitrogen plant control system according to one embodiment of the present invention;
FIG. 3 is a schematic diagram of a distributed high pressure nitrogen plant control system according to one embodiment of the present invention; and
fig. 4 is a diagram of a custom communication protocol data format according to one embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following detailed description, reference is made to the accompanying drawings that form a part hereof and in which is shown by way of illustration specific embodiments of the application. In the drawings, like numerals describe substantially similar components throughout the different views. Various specific embodiments of the present application are described in sufficient detail below to enable those skilled in the art to practice the teachings of the present application. It is to be understood that other embodiments may be utilized and structural, logical or electrical changes may be made to the embodiments of the present application.
The novel interface board is arranged between the controller and the high-pressure nitrogen making equipment, the high-pressure nitrogen making equipment uniformly and electrically connects various wiring interfaces with the interface board according to signal types, and the interface board forwards received signals to the controller; meanwhile, the controller can also send the instruction to the specified equipment through the interface board so as to realize certain functions.
Fig. 1 is a schematic diagram of a high pressure nitrogen plant module according to an embodiment of the present invention. The high-pressure nitrogen making equipment comprises a control module 110, an input module 120, an interface board 130, an air compressor 140, a nitrogen making machine 150 and a nitrogen booster 160. The input module 120 is electrically connected to the control module 110, the control module 110 is electrically connected to the interface board 130, and the air compressor 140, the nitrogen generator 150, and the nitrogen booster 160 are electrically connected to the interface board 130, respectively. Furthermore, the control module and the interface board are connected by a single cable.
The control module 110 can include one or more Central Processing Units (CPUs), Graphics Processing Units (GPUs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), or combinations thereof. The control module 110 is capable of executing software or computer readable instructions stored in memory to perform the methods or operations described herein. The control module 110 can be implemented in a number of different ways. For example, the control module 110 can include one or more embedded processors, processor cores, microprocessors, logic circuits, hardware Finite State Machines (FSMs), Digital Signal Processors (DSPs), or a combination thereof. Further, the control module may also be a PLC controller for sending control instructions through the interface board 130.
The input module 120 may be a touch screen, wherein the touch screen may be a resistive touch screen, a capacitive touch screen, or a surface acoustic wave touch screen. Those skilled in the art can understand that any touch screen capable of implementing the functions of the present application can be applied to the solution of the present application. In some embodiments, the touch screen may be fixed to the PLC controller to form an integrated structure, and the touch screen is connected to the PLC controller through an RJ45 interface, so as to display the working status of one or more of the air compressor, the nitrogen generator and the nitrogen supercharger in real time. The operation panel can also comprise physical buttons for starting and stopping the equipment or selecting and adjusting other functions.
The interface board 130 includes a digital quantity input module 131, a digital quantity output module 132, and an analog quantity input module 133. The digital quantity input module 131, the digital quantity output module 132 and the analog quantity input module 133 are electrically connected with the control module in a bus mode; the digital input module 131, the digital output module 132 and the analog input module 133 are electrically connected to the air compressor 140, the nitrogen generator 150 and the nitrogen booster 160, respectively. The electrical connection method includes, but is not limited to: active contact connections, passive contact connections and 4-20mA signal connections.
The digital input module 131 includes a plurality of digital signal interfaces for collecting digital signals of one or more of the air compressor 140, the nitrogen generator 150, and the nitrogen booster 160, including but not limited to: a switch signal interface, an indicator light signal interface, an alarm signal interface and the like of the equipment; the digital output module 132 comprises a plurality of digital output interfaces for sending control commands to one or more of the air compressor 140, the nitrogen generator 150 and the nitrogen booster 160; the analog input module 133 includes a plurality of analog signal interfaces for collecting analog signals from one or more of the air compressor 140, nitrogen generator 150, and nitrogen booster 160. The analog signal interface includes but is not limited to: a pressure signal interface, a temperature signal interface, an oxygen content information interface, a dew point signal interface and the like.
The working process of the high-pressure nitrogen making device is as follows: the air compressor 140, the nitrogen making machine 150 and the nitrogen booster 160 work in sequence to separate nitrogen from air, and after the purity of the nitrogen meets the requirement, the nitrogen is output after being boosted. Specifically, the operator sets the operating pressure and purity of the produced nitrogen for one or more of the air compressor 140, the nitrogen generator 150, and the nitrogen booster 160 on the input module 120. The control module 110 respectively starts the air compressor 140, the nitrogen generator 150, the nitrogen booster 160 and other devices and corresponding electromagnetic valves through relays according to a set program according to a starting sequence. The air compressor 140, nitrogen generator 150, and nitrogen booster 160 send various operational data to the control module 110 via the interface board.
First, the air compressor 140 is used to compress air to a first pressure threshold, wherein the first pressure threshold is 0.8-1.3 MPa. The air passes through components in the air compressor 140, which can remove most of the oil, water, dust, etc., thereby providing clean compressed air for the nitrogen generator 150 to separate out the nitrogen gas. In some embodiments, an air storage tank is further included in the air compressor 140 to reduce air flow pulsation and system pressure fluctuation, so that the compressed air smoothly passes through the compressed air purification assembly to sufficiently remove oil and water impurities.
The nitrogen generator 150 is connected to the air outlet of the air compressor 140 by a pipeline, and is used for separating nitrogen from air. Wherein, nitrogen generator 150 includes a membrane module and a heating device. In some embodiments, the nitrogen generator further comprises one or more filters for further filtering, dewatering, and purifying the compressed air output by the compressor. The membrane group is used for separating nitrogen from oxygen, carbon dioxide and water in the air and outputting high-purity nitrogen. Wherein heating device is used for heating for membrane group and air wherein, is favorable to make full use of the working property of membrane group, improves gas separation efficiency.
The nitrogen booster 160 is connected with the outlet of the nitrogen generator 150 by a pipeline, and is used for boosting the separated nitrogen to a second pressure threshold value, wherein the second pressure threshold value is 10-40 MPa. After the pressurization is completed, the nitrogen booster detects the pressure, dew point, temperature, and other parameters, and sends the data to the control module 110.
In some embodiments, the high pressure nitrogen plant further comprises a nitrogen buffer tank disposed between the nitrogen boosters for storing nitrogen output by the nitrogen generator, which serves to equalize the pressure of the nitrogen. In addition, the method also plays an extremely important process auxiliary role in the working process of the equipment.
The air compressor 140, the nitrogen generator 150 and the nitrogen booster 160 are provided with various sensors, such as a pressure sensor, a temperature sensor, a dew point sensor, and various electromagnetic valves and relays, which are electrically connected to the control module 110 through an interface board, so as to prevent all circuits from being connected to the control module 110, simplify the wiring manner, and improve the working stability.
In some embodiments, the interface board 130 further includes a memory module for storing programs and operating data for one or more of the air compressor, nitrogen generator, and nitrogen booster. The storage module can store software, data, logs, or a combination thereof. The memory module can be an internal memory or an external memory. For example, the memory can be volatile memory or non-volatile memory, such as non-volatile random access memory (NVRAM), flash memory, disk storage, or volatile memory such as Static Random Access Memory (SRAM).
In some embodiments, the interface board 130 includes an alarm module configured to instruct one or more of the air compressor, nitrogen generator, and nitrogen booster to sound an alarm when the equipment fails. In some embodiments, the alarm module can display a prompt message on the touch screen, or sound an alarm, or send an alarm message to the user's mobile terminal, etc. The memory module in the interface board 130 includes various working data and a set threshold, the interface board 130 can monitor the working data of the high-pressure nitrogen making equipment in real time, and when any one of the working data does not meet the set threshold, the interface board 130 sends an alarm through the alarm module. The alarm module is arranged in the interface board 130, and the interface board judges whether a fault occurs in real time according to the received signal information and timely notifies the fault, so that the processing load of the control module is reduced, the fault notification efficiency is improved, and the loss caused by the fault is reduced. Fig. 2 is a diagram of a high pressure nitrogen plant control system according to one embodiment of the present invention. As shown, the control module 110 is electrically connected to the air compressor 140, nitrogen generator 150, nitrogen booster 160 and nitrogen buffer tank 170 and one or more sensors via interface boards (not shown) to collect high pressure nitrogen generator operating data. Wherein the operating data includes, but is not limited to, operating time, operating conditions, operating temperature, operating pressure, nitrogen purity, and nitrogen dew point. In some embodiments, the sensors include, but are not limited to, pressure sensors, oxygen sensors, dew point sensors, temperature sensors, power sensors, and the like, one or more of which may be connected to the control module using 4-20mA or RS485 signal cables. The power supply sensor is used for collecting the phase sequence, voltage, current and power of the power supply of each device and uploading the phase sequence, voltage, current and power to the control module 110. And when the control module 110 detects that the phase sequence of the power supply is disordered or the phase is leaked, alarming is carried out through an alarm module, and staff are informed. In some embodiments, the power supply sensor collects the current and voltage of the total power supply of the equipment, so that the power utilization safety is ensured.
Referring to fig. 2, a pressure sensor 141 is provided at an air outlet of the air compressor 140 for detecting the pressure of the compressed air of the air compressor. The pressure sensor 141 is electrically connected with the control module 110, and reports the pressure at the outlet of the air compressor in real time. Wherein a switch valve is installed before the pressure sensor 141, and the valve can be closed when the pressure sensor 141 is not operated.
When the air compressor 140 and the nitrogen generator 150 are connected through the electromagnetic valve 140, and the pressure in the air compressor reaches a set threshold value in response, the control module sends a control instruction to open the electromagnetic valve 142, compressed air is introduced into the nitrogen generator 150, and nitrogen is separated. The nitrogen generator 150 is provided with a temperature sensor 151, which is electrically connected to the control module 110 and is configured to report the temperature of the membrane module and/or the gas in the membrane module to the control module 110. And when the temperature of the membrane group and/or the gas in the membrane group of the nitrogen making machine is lower than the set temperature, starting the heating device to perform heating treatment. The gas outlet of the nitrogen generator 150 is connected with an oxygen sensor 152 through a solenoid valve 153 and a pressure reducing valve 156 in sequence, and the oxygen sensor is used for detecting the purity of the nitrogen separated by the nitrogen generator. Further, an evacuation solenoid valve 154 is installed at the air outlet of the nitrogen generator, and in response to the fact that the purity of the nitrogen does not meet the set requirement, the nitrogen is directly discharged into the air. Wherein, the nitrogen generator 150 is connected with the nitrogen buffer tank 170 through a pipeline by the electromagnetic valve 155. The solenoid valve 153, the purge solenoid valve 154, and the solenoid valve 155 are each electrically connected to the control module 110.
When the nitrogen separated by the nitrogen generator 150 meets the set requirements, the electromagnetic valve 155 is turned on to send the nitrogen into the nitrogen buffer tank 170. The nitrogen buffer tank 170 is installed with a pressure transmitter for detecting the pressure thereof, and when the pressure reaches the opening pressure of the nitrogen booster 160, the control module 110 sends a control command to start the nitrogen booster 160. A pressure sensor 171, a purge solenoid valve 172, and a solenoid valve 173 are provided between the nitrogen buffer tank 170 and the nitrogen booster 160, and all of them are electrically connected to the control module 110.
When the nitrogen booster 160 boosts the pressure of the nitrogen to a set pressure, the nitrogen can be output and filled into a nitrogen cylinder for users to use. In some embodiments, the nitrogen booster 160 is connected to a dew point sensor 161 via a solenoid valve 162 and a pressure relief valve 164, and the dew point sensor 161 is configured to detect the humidity of the nitrogen and send the humidity data to the control module 110. In other embodiments, a pressure sensor 163 is provided at the outlet of the nitrogen booster for detecting the pressure of the nitrogen output from the nitrogen booster and reporting to the control module 110.
This application collects the operating data of high pressure nitrogen plant through various sensors, can know the operating condition of high pressure nitrogen plant in real time, judges whether the nitrogen gas that separates accords with the settlement requirement, and the artificial participation that has significantly reduced has improved work efficiency and quality.
When a plurality of high-pressure nitrogen making devices work simultaneously, workers need to check, record, adjust and the like each high-pressure nitrogen making device. When a plurality of high-pressure nitrogen making devices are distributed in a dispersed manner, a large amount of manpower is consumed to complete the work, and the work efficiency is low. Therefore, the central control console is added, the central control console can acquire the working data of the high-pressure nitrogen making equipment distributed in different places, and control instructions can be input to control the working state of the high-pressure nitrogen making equipment.
Fig. 3 is a schematic structural diagram of a distributed high-pressure nitrogen plant control system according to an embodiment of the present invention. As shown, the control system includes a central console 310, a communication module 320, and high pressure nitrogen generation equipment 3301-3332. The communication mode between the central console 310 and the communication module 320 is high-speed bus connection, and the communication module 320 is connected with the high-pressure nitrogen generation equipment 3301-3332 in a communication manner. In some embodiments, the manner in which the central control module 310 communicates with the communication module includes: and the RJ45 interface is connected with an RS485 bus. In some embodiments, the center console 310 is capable of controlling up to 32 high pressure nitrogen plants.
The central console 310 can include one or more Central Processing Units (CPUs), Graphics Processing Units (GPUs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), or a combination thereof. The central console 310 is capable of executing software or computer readable instructions stored in memory to perform the methods or operations described herein. The center console 310 can be implemented in a number of different ways. For example, the central console 310 can include one or more embedded processors, processor cores, microprocessors, logic circuits, hardware Finite State Machines (FSMs), Digital Signal Processors (DSPs), or a combination thereof.
The communication module 320 can include one or more wired or wireless communication interfaces. Such as a communications interface network interface card, wireless modem, or wired modem. In one application, the communication module 320 can be a WiFi modem. In other applications, the communication module 320 can be a 3G modem, a 4G modem, an LTE modem, a bluetooth component, a radio frequency receiver, an antenna, or a combination thereof.
The distributed control system for the high-pressure nitrogen making equipment further comprises a central input module which is electrically connected with the central control module to input instructions and display working data of the plurality of high-pressure nitrogen making equipment. In some embodiments, the central input module is a touch screen, which interfaces with the central control module using an RJ45 interface. In response to the operation of the user on the central input module, the user can call up the working data of the corresponding high-pressure nitrogen making equipment according to the number. Or the working data of all the high-pressure nitrogen making equipment is displayed on the primary interface of the central input module.
In some embodiments, the distributed high pressure nitrogen plant control system further comprises a third party device 340 capable of wirelessly communicating with the communication module, and a user can remotely view and control a plurality of high pressure nitrogen plants on the third party device. A monitoring platform developed by a merchant needs to be installed on the third-party equipment, an account needs to be registered before a user logs in, and the user can be successfully registered after the background identity verification passes. And has different operation authorities according to different work division. Wherein the third party device includes but is not limited to: mobile phones, tablets, notebook computers, wearable devices, and the like.
Fig. 4 is a schematic diagram of a custom communication protocol data format according to an embodiment of the present invention. As shown in the figure, the communication module and the high-voltage nitrogen making equipment are communicated by adopting a customized communication protocol. The custom communication protocol data format comprises: frame header, destination address, data length, data type, data content, check bit. Wherein the data type comprises control instructions and device status data. The equipment state data includes operating states in the air compressor, nitrogen generator, and nitrogen booster, sensor data, and the like.
In some embodiments, the data content of the device state data is subjected to a compression process. Further, the data content is compressed in a residual compression manner that deviates from the threshold. The data packet is compressed in such a way that the data packet is not transmitted for a parameter deviating from the last transmitted parameter by less than a predetermined range. For example, if the data content is that the pressure data sent by a pressure sensor on the air compressor is 1.1MPa, wherein the relative threshold is 0.2MPa, and the pressure parameter sent last time is 1.0MPa, the deviation residual value is 0.1MPa and is smaller than the relative threshold 0.2MPa, and the pressure data of this time is not sent; if the pressure data is 1.3MPa, the deviation residual value is 0.3MPa and is greater than the relative threshold value of 0.2MPa, the 0.2MPa data is compressed and then sent to the communication module.
In some embodiments, the control instructions in the custom protocol are uncompressed, wherein the control instructions are standard control instructions for a high pressure nitrogen plant. According to the method and the device, the data content of the equipment state is compressed, the number of bytes of transmitted data is reduced, and the time for the communication module to receive the equipment state data can be reduced, so that whether further adjustment and instruction issuing are needed can be judged in time, and the quality and the efficiency of nitrogen gas manufacturing are improved.
The high-pressure nitrogen making equipment not only can display and operate on a local display module to realize one-key starting and stopping equipment, but also can display and control a plurality of high-pressure nitrogen making equipment on a central console or third-party equipment in real time, saves the operation cost and improves the working efficiency of the high-pressure nitrogen making equipment.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the scope of the present invention, and therefore, all equivalent technical solutions should fall within the scope of the present invention.
Claims (10)
1. A distributed control system for high-pressure nitrogen making equipment is characterized by comprising:
a central console;
the communication module is in communication connection with the central console; and
at least two high-pressure nitrogen making devices which are respectively connected with the communication module in a wired or wireless way;
wherein, the central console is configured to display the operation states of the plurality of high-pressure nitrogen generation devices in a centralized manner through the communication module and send control instructions.
2. The distributed high pressure nitrogen plant control system of claim 1, wherein the central console and the communication module communicate via a high speed bus connection.
3. The distributed high pressure nitrogen plant control system of claim 1, further comprising: and the third-party equipment is in communication wireless connection with the communication module, and a user can remotely check and control the plurality of high-pressure nitrogen making equipment on the third-party equipment.
4. The distributed high pressure nitrogen plant control system of claim 3, wherein the communication module communicates with a plurality of high pressure nitrogen plants using a customized communication protocol, wherein the packet delay of the status data is less than 500 ms.
5. The distributed high pressure nitrogen plant control system of claim 4, wherein the custom communication protocol includes at least the following in packet format for status data: the device comprises a frame header, a data length, data content and check bits, wherein the data content is subjected to compression processing.
6. The distributed high pressure nitrogen plant control system of claim 5, wherein the data content is compressed by residual compression that deviates from a threshold.
7. The distributed high pressure nitrogen plant control system of claim 5, wherein the data packets are compressed in such a way that no parameter deviating from the last transmitted parameter by less than a predetermined range is transmitted.
8. The distributed high pressure nitrogen plant control system of claim 1, wherein the central console is capable of controlling up to 32 high pressure nitrogen plants.
9. The distributed high pressure nitrogen plant control system of claim 4, wherein control instructions in the custom protocol are uncompressed.
10. The distributed high pressure nitrogen plant control system of claim 9, wherein the control commands in the custom protocol are standard control commands for a high pressure nitrogen plant.
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