CN212391741U - Novel process control system training platform - Google Patents

Abstract

The utility model discloses a novel process control system practical training platform, which comprises a laboratory bench body; the left side and the right side of the front end of the top of the experiment table body are respectively provided with an industrial PAD client and a display; an industrial network switch is arranged right behind the display; a wireless router is arranged right behind the industrial PAD client; a cabinet is arranged at the lower part of the front end of the experiment table body; a computer server is installed in the cabinet; the computer server is respectively connected with the display, the keyboard and the mouse through data lines; the industrial network switch is respectively connected with the wireless router and the computer server through network cables; the industrial PAD client wirelessly communicates through a wireless router; the middle part and the rear side of the top of the experiment table body are provided with process control systems; the utility model discloses structural design science should instruct the liquid control process that the platform can simulate and engineering is actual very close in fact, realizes the range control to the liquid level to and the PID control of temperature.

Description

Novel process control system training platform

Technical Field

The utility model relates to a real standard platform technical field of school especially relates to a real standard platform of novel process control system.

Background

At present, in the course of teaching in schools, automatic control and industrial network technology courses set by the professions of electromechanical integration, electrical automation and the like need to rely on a practical training platform and adopt a teaching mode of integrating physics and reality, so that students can understand and master related technologies more intuitively and vividly, the system design, software programming and field debugging capabilities can be effectively improved, and a good foundation is laid for going to work posts in the future.

However, for the traditional training platform, the phenomenon of disjunction with the actual industrial control process exists, such as the basic practice of emphasizing single machine control and the like, and the application of network communication and components is ignored;

secondly, the traditional training platform is weak in comprehensiveness, has the problems of mutual independence of training items, fixed schemes, few cases and the like, and is not beneficial to developing teaching training in a gradual, flexible and effective manner.

Thirdly, the traditional practical training platform has the defects of not tight theoretical and actual connection and difficult parameter setting for realizing the PID automatic control algorithm.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a real platform of instructing of novel process control system to the technical defect who exists among the prior art.

Therefore, the utility model provides a novel process control system training platform, which comprises a vertically distributed experiment table body;

the left side and the right side of the front end of the top of the experiment table body are respectively provided with an industrial PAD client and a display;

a keyboard and a mouse are arranged right in front of the display;

an industrial network switch is arranged right behind the display;

a wireless router is arranged right behind the industrial PAD client;

a cabinet is arranged at the lower part of the front end of the experiment table body;

a computer server is installed in the cabinet;

the computer server is respectively connected with the display, the keyboard and the mouse through data lines;

the industrial network switch is respectively connected with the wireless router and the computer server through network cables;

the industrial PAD client side carries out wireless communication through the wireless router;

the middle part and the rear side of the top of the experiment table body are provided with a process control system;

a process control system including a first support and a second support;

the first support and the second support are fixedly arranged at the top of the experiment table body;

the lower water tank is arranged at the top of the first bracket;

the top of the experiment table body is arranged between the first support and the second support, and a water pump is arranged on the top of the experiment table body;

the upper water tank is arranged at the top of the second bracket;

the water inlet pipe on the right side of the upper water tank is communicated with the water outlet at the bottom of the lower water tank through a water pump;

the water outlet pipe at the central position of the bottom of the upper water tank is communicated with the water inlet at the lower part of the left side of the lower water tank through an electric valve.

Wherein, upper water tank and lower water tank place respectively on the square top plane of first support and second support.

The periphery of the top plane of the first support and the periphery of the top plane of the second support are upwards protruded;

the upper water tank and the lower water tank have the same size;

the height of the bottom surface of the upper water tank is higher than that of the top surface of the lower water tank.

Wherein, a flowmeter is arranged between the water inlet pipe of the upper water tank and the water outlet of the water pump;

an electric valve is arranged between the water outlet pipe of the upper water tank and the water inlet pipe of the lower water tank.

Wherein, a first overflow-preventing water pipe is led out from the front side of the upper water tank close to the top;

the first overflow-proof water pipe is communicated with an overflow-proof water tank arranged on the right side of the lower part of the experiment table body;

the anti-overflow water tank is a hollow tank body;

a second overflow-proof water pipe is led out from the position, close to the top, of the right side of the lower water tank and is connected into the overflow-proof water tank;

the bottom of the lower water tank is provided with a drain pipe;

the drain pipe is provided with a manual halter for draining water.

The volume of the anti-overflow water tank is larger than the sum of the volume of the upper water tank and the volume of the lower water tank.

Wherein, the lower part of the left side of the upper water tank is provided with a heating device;

a temperature sensor is arranged at the lower part of the left side of the upper water tank;

the temperature sensors and the heating device arranged on the upper water tank keep a preset spacing distance and are arranged side by side according to the same height;

the middle-lower part of the left side of the upper water tank is also provided with a liquid level sensor;

and a liquid level sensor is also arranged at the middle lower part of the left side of the lower water tank.

Wherein, the rear side of the top of the experiment table body is provided with a stainless steel shell;

an upper water tank temperature monitoring instrument, an upper water tank liquid level monitoring instrument and a lower water tank liquid level display instrument are arranged on the stainless steel shell;

the upper water tank temperature monitoring instrument is connected with a digital quantity input and output module integrated with the PLC module through a signal wire;

the upper water tank liquid level monitoring instrument is connected with a digital quantity input and output module integrated with the PLC module through a signal wire;

wherein, the lower water tank liquid level display instrument is connected with the digital quantity input and output module integrated by the PLC module through a signal wire.

Wherein, a power module and a PLC module are also arranged in the cabinet;

an air circuit breaker and a leakage protector are connected to a connecting circuit between the power supply module and an external alternating current power supply;

the power module is connected with the computer server, the industrial network switch, the industrial PAD client, the wireless router, the PLC module, the water pump, the electric valve, the alarm lamp, the upper water tank temperature monitoring instrument, the upper water tank liquid level monitoring instrument, the lower water tank liquid level display instrument, the flowmeter, the temperature sensor, the liquid level sensor and the heating device through the electrified conducting wire, and is used for providing working power for the modules.

Wherein, the top table surface of the experiment table body is provided with a plurality of transverse groove bodies which are longitudinally distributed at equal intervals in advance;

the top table surface of the experiment table body is provided with a plurality of longitudinal groove bodies on the left side and the right side of the transverse groove bodies respectively;

the side and the back of the cabinet are designed by mesh plates;

four corners of the bottom of the experiment table body are respectively provided with a universal wheel with a locking mechanism.

By the above the utility model provides a technical scheme is visible, compares with prior art, the utility model provides a novel real platform of instructing of process control system, its structural design science should instruct the liquid control process that the platform can simulate very close with the engineering reality in fact, realizes the range control to the liquid level.

Furthermore, the utility model discloses a novel real platform of instructing of process control system can also simulate the liquid control process that is very close with the engineering reality, realizes the PID control based on PWM (pulse width modulation) technique to liquid temperature.

Additionally, it is right the utility model discloses, this platform fuses advanced industrial control and communication technology such as automated inspection and control, instrument and meter, MODBUS communication, industrial ethernet communication, computer communication, wireless communication, remote monitoring together. The method combines the Hirand occupational direction and the CDIO (engineering education) teaching concept, adopts a project-based teaching method to develop a practical training routine in a matching way, effectively improves the engineering practice ability and employment competitiveness of students, and has great practical significance.

Drawings

Fig. 1 is a block diagram of a novel process control system training platform according to the present invention;

fig. 2 is a schematic front structural view of a novel process control system training platform provided by the present invention;

fig. 3 is a schematic view of a three-dimensional structure of a novel process control system training platform provided by the present invention;

fig. 4 is a left side view of a novel process control system training platform provided by the present invention;

fig. 5 is a schematic back structure diagram of a novel process control system training platform provided by the present invention;

fig. 6 is the utility model provides a novel real standard flow diagram of platform of process control system.

Detailed Description

In order to make the technical field of the present invention better understand, the present invention is further described in detail with reference to the accompanying drawings and embodiments.

Referring to fig. 1 to 6, the utility model provides a novel process control system training platform, which is a process control system training platform based on the technology of internet of things, and specifically comprises a vertically distributed experiment table body 100;

the left side and the right side of the front end of the top of the experiment table body 100 are respectively provided with an industrial PAD (tablet personal computer) client 1 and a display 7;

a keyboard 5 and a mouse 6 are arranged right in front of the display 7;

an industrial network switch 8 is arranged right behind the display 7;

a wireless router 2 is arranged right behind an industrial PAD (tablet personal computer) client 1;

a cabinet 3 is arranged at the lower part of the front end of the experiment table body 100;

a computer server is installed in the cabinet 3;

wherein, the computer server is respectively connected with the display 7, the keyboard 5 and the mouse 6 through data lines;

the industrial network switch 8 is respectively connected with the wireless router 2 and the computer server through network cables;

the industrial PAD client 1 carries out wireless communication through the wireless router 2;

in the present invention, in the concrete implementation, the middle part and the rear side of the top of the experiment table body 100 are provided with a process control system;

a process control system including a first support 11 and a second support 15;

the first bracket 11 and the second bracket 15 are fixedly arranged at the top of the experiment table body 100;

the top of the first bracket 11 is provided with a lower water tank 12;

the top of the experiment table body 100 is arranged between the first bracket 11 and the second bracket 15, and a water pump 14 is arranged;

the upper water tank 16 is arranged at the top of the second bracket 15;

a flow meter 13 is arranged between the water inlet pipe of the upper water tank 16 and the water outlet of the water pump 14.

In a specific implementation, the height of the second bracket 15 is greater than the height of the first bracket 11.

In the concrete realization, first support 11 and second support 15 choose for use the industry aluminium alloy, adopt bolt and the 100 top fixed connection of laboratory bench stage body, fix on laboratory bench stage body 100.

In the concrete implementation, a groove body is pre-opened in the middle of the outer surfaces of the first support 11 and the second support 15, and is used for facilitating wiring and installation of the wire groove 18.

In a specific implementation, the upper water tank 16 and the lower water tank 12 are respectively placed on the square top planes of the first bracket 11 and the second bracket 15.

In the concrete realization, the outer eaves all around of the top plane of first support 11 and second support 15 upwards protruding (specifically protruding 2 ~ 3cm) to fixed water tank.

In a specific implementation, the top planes of the first bracket 11 and the second bracket 15 are provided with holes so that water pipes pass through the platform and are connected with the corresponding water tanks.

In particular, the upper water tank 16 and the lower water tank 12 have the same size;

the level of the bottom surface of the header tank 16 is higher than the level of the top surface of the lower tank 12.

It should be noted that the utility model discloses in, the upper water tank 16 that process control system includes, lower water tank 12, connect water pipe, heating device 21, temperature sensor 17, level sensor 22, flowmeter 13, instrument module (including upper water tank temperature monitoring instrument 231, upper water tank liquid level monitoring instrument 232, lower water tank liquid level display instrument 233), water pump 14, electric valve 24, alarm lamp 9 and button box module 19 belong to the perception layer of thing networking three-layer framework.

The utility model discloses in, on specifically realizing, header tank 16 adopts transparent ya keli material to make, and the size can be designed into 200 x 500 mm.

In particular, the water inlet pipe 161 on the right side of the upper water tank 16 is communicated with the water outlet at the bottom of the lower water tank 12 through the water pump 14;

the water outlet pipe 162 at the center of the bottom of the upper water tank 16 is communicated with the water inlet at the lower left part of the lower water tank 12 through the electric valve 24.

The water inlet pipe is led out from the center of the bottom of the lower water tank 12 through the water pump 14 and is connected to the upper position of the right side of the upper water tank 16. The water outlet pipe is led out from the center of the lower part of the upper water tank 16 and is connected to the center of the lower part of the left side of the lower water tank 12 through an electric valve 24. The top of the upper water tank 16 is provided with a transparent cover plate which is connected by a hinge to prevent the water pump from pumping water and splashing.

In a concrete implementation, a first overflow preventing water pipe 163 is led out from the front side of the upper water tank 16 close to the top;

the first overflow preventing water pipe 163 is communicated with the overflow preventing water tank 10 arranged at the right side of the lower part of the experiment table body 100;

the anti-overflow water tank 10 is a hollow tank body.

The utility model discloses in, the lower header 12 on specifically realizing adopts transparent ya keli material to make, and the size is unanimous with upper header 16. Except for the water pipe connected with the upper water tank, a second overflow-preventing water pipe 121 is led out from the right side of the lower water tank 12 close to the top, and the second overflow-preventing water pipe 121 is connected to the overflow-preventing water tank 10 from being distributed on the right side of the experiment table.

In particular, the bottom of the lower water tank 12 is provided with a drain pipe 120;

a manual tap is installed on the drain pipe 120 for draining water.

In the concrete implementation, the top of the lower water tank 12 is provided with a transparent cover plate which is connected by a hinge to prevent water from splashing.

To the utility model discloses, the connection water pipe of including for the tube coupling between upper water tank, lower water tank, the anti-overflow flowing water tank.

In a specific implementation, the volume of the overflow prevention water tank 10 is larger than the sum of the volume of the upper water tank 16 and the volume of the lower water tank 12.

The overflow preventing water tank 10 is mounted on a bracket at the right rear portion below the laboratory table body. The anti-overflow water tank 10 is made of transparent acrylic material, the size of the anti-overflow water tank 10 is ensured to be larger than the sum of the volume of the upper water tank 16 and the volume of the lower water tank 12, the size of the anti-overflow water tank can be designed to be 400 x 600 x 300mm, anti-overflow water pipes of the upper water tank and the lower water tank are connected to the anti-overflow water tank from a pipe distribution at the right side of the experiment table, and a drain hole is designed at the bottom of the anti-overflow water tank.

In the present invention, in the concrete implementation, the heating device 21 is installed at the lower portion of the left side of the upper water tank 16.

In the concrete implementation, the heating device 21 can be an SV-LH series stainless steel PTC semiconductor liquid heater produced by Shenzhen Tianxiang science and technology Limited, and is used for heating liquid in the upper water tank, so that the heating device has the characteristics of high electric-heat conversion rate and corrosion resistance, and the power can be 4 KW.

In the specific implementation, a DI/DO (digital input/output) module in a PLC module in a cabinet is connected with a solid-state relay to supply power to a heating device, digital PID (proportion integration differentiation) control is realized based on a PWM (pulse width modulation) technology in the aspect of program design, the heating device is supplied with power, and the heating device is supplied with power by 220 VAC.

In the utility model, in the concrete implementation, the lower part of the left side of the upper water tank 16 is provided with a temperature sensor 17;

the temperature sensors 17 are installed side by side at the same height while maintaining a predetermined interval distance from the heating device 21 installed in the upper water tank 16.

In the specific implementation, a PT100 temperature sensor is adopted to detect the temperature, and is matched with a 4-20mA transmitter, and the temperature sensor is supplied with power by 24 VDC. The signal line is led out through a line slot 18 and connected to an AI (analog input) module of the PLC.

In the practical realization of the utility model, a liquid level sensor 22 is also arranged at the middle lower part of the left side of the upper water tank 16, the liquid level sensor 22, the heating device 21 and the temperature sensor 17 keep a preset spacing distance and are arranged side by side according to the same height,

in the concrete implementation, a liquid level sensor is also installed at the middle lower part of the left side of the lower water tank 12.

It should be noted that the liquid level sensor is based on the pressure sensor principle, and is matched with a 4-20mA transmitter, and the liquid level sensor is powered by 24 VDC. The signal line is led out through the wire groove 18, and the signal line is led out through the wire groove and connected with an AI (analog input) module of the PLC.

The utility model discloses in, on specifically realizing, flowmeter 13 installs between the delivery port of the water inlet mouth of pipe of upper water tank 16 and water pump 14, and flowmeter 13 adopts MODBUS communication, is connected with the MODBUS communication module of PLC carry, has the reading display function on it, and the flowmeter adopts the 24VDC power supply.

In the present invention, in particular, the instrumentation module includes an upper tank temperature monitoring instrument 231, an upper tank liquid level monitoring instrument 232 and a lower tank liquid level display instrument 233;

in particular, a stainless steel shell 200 is arranged on the rear side of the top of the experiment table body 100;

on the stainless steel case 200, an upper tank temperature monitoring instrument 231, an upper tank liquid level monitoring instrument 232, and a lower tank liquid level display instrument 233 are provided.

Specifically, three meters are packaged in the stainless steel housing 200, the bottom of the stainless steel housing 200 is connected with the top surface of the experiment table body 100 by bolts and screws, a power supply and signal line opening is reserved on the rear side of the stainless steel housing 200 so as to be connected to a wire slot, signal lines of the three meters are connected with a DI/DO (digital input/output) module of a PLC module in a cabinet, and the meter module is powered by 24 VDC.

Wherein, upper water tank temperature monitoring instrument 231 is connected with the DI/DO (digital input/output) module integrated with the PLC module in the cabinet through a signal line, has two lines of digital display functions, can respectively display the set temperature and the measured temperature of the upper water tank liquid, and is provided with shift, increase, decrease and confirm keys.

The upper water tank liquid level monitoring instrument 232 is connected with a DI/DO (digital input/output) module integrated with a PLC module in the cabinet through a signal line, has two lines of digital display functions, can respectively display a set value and an actual measurement value of the upper water tank liquid level, and is provided with shift, increase, decrease and determination keys.

The lower tank level display instrument 233 is connected to a DI/DO (digital input/output) module integrated with the PLC module in the cabinet via a signal line, and has a digital display function for displaying a measured value of the lower tank level.

The utility model discloses in, on specifically realizing, water pump 14 adopts from inhaling formula drainage pump, ensures the security of drawing water under anhydrous state, follows the bottom centre of lower water tank and draws the outlet pipe, draws water through the water pump and send the inlet tube to the upper water tank. The DI/DO (digital input/output) module of the PLC is connected with a relay to control the start/stop of the water pump, and the water pump is powered by 220 VAC.

The utility model discloses in, on specifically realizing, electric valve 24 installs between the outlet pipe of upper water tank 16 and the inlet tube of lower water tank 12, adopts two mouthful normal close formula solenoid valves, and the control line passes through PLC's DI/DO (digital input output) module to be connected, and electric valve adopts the 24VDC power supply.

The utility model discloses in, on specifically realizing, the top right side of laboratory bench stage body 100 leans on preceding position, installs alarm lamp 9.

In specifically realizing, alarm lamp 9, adopt the design of tower lamp, install and lean on the right in the front portion of real standard platform mesa, through DI/DO (digital input/output) module with PLC be connected and realize control, possess the tristimulus display function, it is less than heating device to correspond suggestion upper water tank liquid level respectively, the upper water tank liquid level is higher than safe upper limit liquid level, the lower water tank liquid level is higher than three kinds of alarm state of safe upper limit liquid level, and can cooperate program control, cut off heating device, water pump and electric valve power supply immediately under alarm state. The alarm lamp is powered by 24 VDC.

The utility model discloses in, on specifically realizing, a button box module 19 is installed on the top left side of laboratory bench stage body 100.

In specific implementation, the button box module 19 comprises 4 buttons of start, stop, reset and scram. The emergency stop button is connected with a power module installed in the cabinet, and the system power supply is cut off from a circuit by pressing a switch in an emergency. The signal lines of the start, stop and reset buttons are connected with a DI/DO (digital input/output) module of the PLC, and are controlled by a program.

The utility model discloses in, on specifically realizing, knob formula platform power supply master switch 4 is installed to the right side cabinet door surface of rack 3, makes things convenient for a key to open and stop.

The utility model discloses in, on specifically realizing, except installing computer server, still install power module 31, PLC module 32 and relay module 33 in the rack 3.

The power module 31 adopts a taiwan Mingxi LRS-200-24 power supply, and is used for converting 220V alternating current AC into 24V direct current DC.

In particular, an air circuit breaker (i.e., an air switch) and a leakage protector 35 are connected to a connection line between the power module 31 and an external ac power supply. The power module 31 has the functions of grounding, overload, short circuit, and leakage protection by connecting the air circuit breaker and the leakage protector.

In the concrete implementation, power module 31 is connected with computer server, industrial network switch, industry PAD customer end, wireless router, PLC (programmable logic controller) module, water pump, electric valve, alarm lamp, upper water tank temperature monitoring instrument, upper water tank liquid level monitoring instrument, lower water tank liquid level display instrument, flowmeter, temperature sensor, level sensor and heating device through the circular telegram wire for provide the power consumption of working for these modules.

In specific implementation, the PLC module 32 may be loaded with an MODBUS communication module, an MPI-to-ethernet communication module, and an AI analog input module.

In particular, the PLC module 32 may specifically adopt siemens S7-300PLC, and select the CPU313C, and has a PWM (pulse width modulation) function; the integrated 16-bit configurable DI/DO (digital input/output) module is respectively connected with a relay module 33 (used for controlling the water pump and the heating device to work), an electric valve, an instrument module, an alarm lamp and a button box module through a wiring terminal block 34;

the PLC module 32 can realize MODBUS communication through mounting the CP341 module and is connected with the flowmeter; the device is connected with 1 temperature sensor and 2 liquid level sensors through a mounting AI (analog input) module and a wiring terminal table; by configuring the interface module for converting MPI into Ethernet, the program can be downloaded and debugged, and a network cable can be led out through the Ethernet interface and connected with an industrial network switch.

In a specific implementation, an input part (control end) of the relay module 33 is connected to a DI/DO (digital input/output) module in the PLC module 32, and an output part (controlled end) thereof is connected to the water pump 14 and a 220VAC power supply circuit of the heating device 21. Through the PLC program, can realize the power supply control to water pump and heating device respectively.

In the concrete implementation, the computer server is installed on the right side inside the cabinet. The computer server is connected with the display, the keyboard and the mouse through data lines respectively. The installation program mainly comprises STEP7, a ProcessHub, a Workbench and an industrial APP rapid generation suite.

In the utility model, in the concrete implementation, the experiment table body 100 is made of industrial aluminum profile, and the top table surface of the experiment table body 100 is provided with a plurality of transverse groove bodies 101 which are longitudinally distributed at equal intervals in advance;

the top table of the experiment table body 100 is provided with a plurality of longitudinal grooves 102 on the left and right sides of the transverse groove 101.

It should be noted that, for the utility model discloses, through set up horizontal cell body 101 and vertical cell body 102 in advance, be convenient for punch the wiring, install the fixed of wire casing and other equipment.

The utility model discloses in, on specifically realizing, the side and the back of rack 3 adopt mesh panel design, are convenient for dispel the heat and lay wire.

In the concrete realization, install the fan in the rack 3 for improve the heat-sinking capability of rack.

The utility model discloses in, on specifically realizing, the bottom four corners of laboratory bench stage body 100 is equipped with a universal wheel 20 of taking locking mechanism respectively.

The utility model discloses in, in the concrete realization, industrial network switch 8 belongs to the network layer of thing networking three-layer architecture, and S7-300 series PLC (PLC module promptly) changes the ethernet module through MPI, is connected with industrial network switch.

In addition, the computer server and the wireless router 2 are connected with the industrial network switch 8 through network cables, and communication between the sensing layer and the application layer is achieved.

The utility model discloses in, on specifically realizing, wireless router 2 belongs to the network layer of thing networking three-layer framework, and wireless router 2 passes through the net twine with industrial network switch 8 and is connected, and industry PAD customer end 1 communicates with industrial network switch 8 through wireless router 2.

The utility model discloses in, on specifically realizing, industry PAD customer end 1 belongs to the application layer of thing networking three-layer framework, adopts industry level PAD, based on the Workbench development HMI interface on computer server, based on industry APP fast generation external member development PAD customer end.

The utility model discloses in, in the concrete realization, display 7, keyboard 5 and mouse 6 belong to computer server's peripheral hardware.

Based on the above scheme, it should be noted that, for the practical training platform provided by the utility model, the platform adopts a standard internet of things three-layer architecture design, and the application layer comprises a computer server and a PAD client; the network layer is based on industrial network switch and wireless router communication; the perception layer mainly comprises a PLC module, a relay module, an electric valve, a water pump, a heating device, a temperature sensor, a liquid level sensor, a flowmeter, an instrument module, a button box module and an alarm lamp.

The practical training platform can simulate a liquid control process very close to the actual engineering, realize the range control of the liquid level and realize the PID control of the liquid temperature based on the PWM (pulse width modulation) technology. The platform integrates advanced industrial control and communication technologies such as automatic detection and control, instruments and meters, MODBUS communication, industrial Ethernet communication, computer communication, wireless communication, remote monitoring and the like. The Howland occupational direction and the CDIO teaching concept are combined, a project-based teaching method is adopted to develop a practical training routine in a matching manner, and the engineering practice ability and employment competitiveness of students are effectively improved.

In order to understand the technical solution of the present invention more clearly, the working principle of the present invention is explained below.

To the utility model provides a pair of real platform of instructing of process control system, its embodiment is as follows:

the method comprises the steps of grouping students into posts based on the Holland occupational theory by taking a project as a driver, specifically dividing the posts into a demand engineer, a research and development engineer and a field engineer, sequentially carrying out demand analysis, progress control, system design, software development and performance debugging by combining a CDIO design flow, and constructing an industrial Ethernet and programming by using Step7 to configure S7-300PLC on a computer server. Developing a computer server based on a ProcessHub, and quickly generating a suite development industrial PAD client based on a Workbench and an industrial APP.

The utility model discloses, on concrete realization, use Step7 to the PLC configuration, construct industrial ethernet and programming, based on ProcessHub development computer server end program, based on Workbench development PAD customer end HMI interface, use industry APP to generate external member development APP fast, finally realize standard thing networking three-layer architecture communication and remote monitoring.

The utility model discloses, according to thing networking three-layer framework from supreme, local back holistic thinking earlier, design 7 real standard routines (real standard project promptly) step by step. The first 4 routines face to a perception layer, the PLC is highlighted to acquire and control digital signals through an internal integrated DI/DO (digital input/output) module, acquire analog signals through an AI (analog input) module and acquire data through MODBUS communication, and in software design, important learning is realized by adopting digital signals to realize PID control based on a pulse width modulation technology; 5, 6 routines, highlighting communication function implementation of the whole system, industrial PAD client HMI design and APP rapid generation method; the 7 th routine is a comprehensive application to the first 6 routines. The method specifically comprises the following steps:

the water circulation dynamic balance training project of the upper water tank and the lower water tank.

Through the configuration and programming of the PLC module and the internal integration of a DI/DO (digital input/output) module, the relay module is controlled to supply/cut off power to the water pump, so that water is pumped from the lower water tank to the upper water tank; the opening/closing of the electric valve is controlled through the DI/DO module, so that water is discharged from the upper water tank to the lower water tank. And the water circulation of the upper water tank and the lower water tank is completed by adjusting time parameters, so that the dynamic balance of the liquid levels of the two water tanks is realized. In addition, the start, stop and reset functions of the button box module are verified through the DI/DO module.

The method specifically comprises the following steps: and selecting 313C type PLC by using Step7 software, and sequentially inserting a power supply module, a CP341 module (for realizing MODBUS communication) and an AI module (for realizing analog signal acquisition). In the aspect of program design, a DI/DO (digital input/output) module is integrated in the PLC, and a relay module is controlled to supply/cut off power to a water pump, so that water is pumped from a lower water tank to an upper water tank; the opening/closing of the electric valve is controlled by the DI/DO module, so that water is discharged from the upper water tank to the lower water tank. The water circulation of the upper water tank and the lower water tank is completed by adjusting the time parameters of the 2 relays, and the dynamic balance of the liquid levels of the two water tanks is realized. Meanwhile, the DI/DO module is used for detecting the button state of the button box and carrying out starting, stopping or resetting operation.

And II, carrying out liquid level control practical training items of the upper water tank.

The upper water tank liquid level is preset through the configuration and programming of the PLC module and the upper water tank liquid level monitoring instrument, and a liquid level range control method is adopted in the PLC program to set the lower limit and the upper limit of the liquid level according to the preset value due to hysteresis of liquid level control. Acquiring data of a liquid level sensor of the upper water tank through an AI (analog input) module, converting the data into a liquid level measurement value, and comparing the liquid level measurement value with a preset value; the power supply/cut-off of the water pump is controlled by a relay module through an internal integrated DI/DO (digital input/output) module, so that water is pumped from a lower water tank to an upper water tank; the opening/closing of the electric valve is controlled by the DI/DO module, so that water is discharged from the upper water tank to the lower water tank. Finally, the stable control of the liquid level of the upper water tank is realized. In addition, PLC accessible MODBUS communication mode gathers flow sensor data. In addition, the PLC module can acquire flowmeter data in an MODBUS communication mode and verify the flowmeter reading through observation.

The method specifically comprises the following steps: and selecting 313C type PLC by using Step7 software, and sequentially inserting a power supply module, a CP341 module (for realizing MODBUS communication) and an AI module (for realizing analog signal acquisition). The 'shift, increase, decrease and confirm' button is operated on the upper water tank liquid level monitoring instrument, the upper water tank liquid level is preset, and the upper water tank liquid level is sent to the PLC through an internal integration DI/DO (digital input and output) module. Because the liquid level control has hysteresis, in the aspect of program design, a liquid level range control method is adopted, and the lower limit and the upper limit of the liquid level of the upper water tank are set according to the preset value of the instrument. The PLC module passes through AI (analog input) module, gathers upper water tank level sensor data, converts into the liquid level measurement value to compare with the default, and then through DI/DO module, control relay module supplies/cuts off the power supply to the water pump, realizes drawing water from lower water tank to upper water tank, perhaps controls the electrically operated valve through DI/DO module and opens/closes, realizes following the upper water tank and draining water to the lower water tank. Finally, the stable control of the upper water tank liquid level is realized, and the verification can be carried out by observing 2-line digital display (respectively representing a set value and a measured value) of the upper water tank liquid level monitoring instrument. In addition, PLC accessible MODBUS communication mode gathers flowmeter data to verify through observing the flowmeter reading.

And thirdly, controlling a training item by the temperature PID of the upper water tank.

The method comprises the steps that the upper water tank temperature is preset through a upper water tank temperature monitoring instrument through configuration and programming of a PLC module, the preset value is read through a DI/DO (digital input/output) module integrated in the PLC, data of an upper water tank temperature sensor are collected through an AI (analog input) module, the data are converted into a temperature measured value, and the temperature measured value is compared with the preset value; through the parameter setting function of a PID controller of the S7-300 series PLC, based on the pulse width modulation technology, the DI/DO module is used for controlling the solid state relay to change the duty ratio, so that the power supply/cut-off of the heating device is realized, and the stable control of the temperature of the upper water tank is realized.

The method specifically comprises the following steps: and selecting 313C type PLC by using Step7 software, and sequentially inserting a power supply module, a CP341 module (for realizing MODBUS communication) and an AI module (for realizing analog signal acquisition). The 'shift, increase, decrease and determination' button is operated on the upper water tank temperature monitoring instrument to preset the upper water tank temperature, and a digital input/output (DI/DO) module integrated in the PLC is used for reading the preset value. Acquiring data of a temperature sensor of the upper water tank through an AI (analog input) module, converting the data into a temperature measurement value, and comparing the temperature measurement value with a preset value; in the aspect of program design, the parameter setting function of a PID controller of an S7-300 series PLC is debugged, PID control is realized by adopting digital signals based on a pulse width modulation technology (a DI/DO module is used for controlling a solid relay to change the duty ratio and supply/cut off power to a heating device), the stable control of the temperature of the upper water tank is realized, and 2-row digital display (respectively representing a set value and a measured value) of the upper water tank temperature monitoring instrument can be observed for verification.

And fourthly, controlling the liquid level and the temperature of the upper water tank to be practical training items.

Synthesize real standard project 2, 3, through upper water tank temperature, liquid level monitoring instrument setting parameter, in the programming, combine the alarm lamp function, control the liquid level earlier, later control temperature. After the liquid level and the temperature are stable, the water circulation of the upper water tank and the lower water tank is balanced, and the control is continued.

The method specifically comprises the following steps: and (3) synthesizing training items 2 and 3, selecting 313C type PLC by using Step7 software, and sequentially inserting a power module, a CP341 module (for realizing MODBUS communication) and an AI module (for realizing analog signal acquisition). The upper water tank liquid level monitoring instrument and the temperature monitoring instrument are sequentially operated, a 'shift, increase, decrease and determination' button is operated on the upper water tank liquid level monitoring instrument and the temperature monitoring instrument, the upper water tank liquid level and the temperature are preset, and preset parameters are sent to the PLC through an internal integrated DI/DO (digital input/output) module. In the programming, the liquid level is controlled first, and then the temperature is controlled. The liquid level adopts a range control method, and the lower limit and the upper limit of the liquid level of the upper water tank are set according to a preset value; the temperature adopts a PID control method based on a pulse width modulation technology. Through AI (analog input) module, gather upper water tank level sensor data, convert the liquid level measurement value into to compare with the liquid level default, and then through DI/DO module, control relay module supplies/cuts off the power supply to the water pump, realizes drawing water from lower water tank to upper water tank, perhaps controls the electrically operated valve through DI/DO module and opens/closes, realizes following the upper water tank and draining water to the lower water tank. After the liquid level is stable, data of the upper water tank temperature sensor is collected through an AI (analog input) module, converted into a temperature measurement value, and compared with a preset value. The debugging is carried out through the parameter setting function of the PID controller of the S7-300 series PLC, the PID control is realized by adopting digital signals (the duty ratio is changed by controlling a solid relay through a DI/DO module, and the power supply/power off of a heating device) based on the pulse width modulation technology, and the stable control of the temperature of the upper water tank is realized. Verification was performed by observing 2-line digital displays (representing set and measured values, respectively) of the header tank level monitoring instrument and the temperature monitoring instrument. And finally, after the liquid level and the temperature are stable for a plurality of minutes, starting the water pump and the electric valve to ensure that the water circulation of the upper water tank and the lower water tank breaks the balance and controls the upper water tank and the lower water tank again. In addition, the temperature, the liquid level data of accessible AI (analog input) module real-time collection are compared with the warning value of presetting, through DI/DO module control three-colour alarm lamp, when the upper water tank liquid level is less than heating device, the upper water tank liquid level is higher than safe upper limit liquid level, the lower water tank liquid level is higher than safe upper limit liquid level, correspond three kinds of colour alarm indication respectively to cooperation program control cuts off heating device, water pump and electric valve power supply immediately.

And fifthly, the PLC communicates with the computer server through the switch.

Based on the practical training item 4, based on Step7, the PLC and the switch form an industrial ethernet through an MPI-to-ETH (ethernet) gateway. And developing a computer server based on the ProcessHub to realize communication between the PLC module and the computer server.

The method specifically comprises the following steps: on the basis of the practical training item 4, Step7 software is used, 313C type PLC is selected, a power supply module, a CP341 module (for achieving MODBUS communication) and an AI module (for achieving analog signal acquisition) are sequentially inserted, and an industrial Ethernet is formed by the MPI-to-ETH (Ethernet) gateway and the exchanger. The server is developed based on the Processhub, and the method mainly completes the definition of the address of the server, the IP address of the associated PLC and the setting of a matched communication point in the virtual variable corresponding to the terminal address of the global variable of the PLC program. And finally, verifying the communication function of the server and the PLC by running a Processhub service on the server and running Open SMC to send and receive data.

And sixthly, the industrial PAD client communicates with the computer server.

On the basis of the practical training project 5, an HMI (human machine interface) of an industrial PAD client is developed based on Workbench, an industrial APP is used for quickly generating a suite, the suite is associated with the Workbench project to produce the industrial PAD client, and the communication between the industrial PAD client and a computer server is realized through a wireless router.

The method specifically comprises the following steps: on the basis of the practical training project 5, based on a Workbench visualization page development module, relevant components are added and moved, component associated variables, operation assignment, animation demonstration and the like are set, and an HMI interface of an industrial PAD client is developed. And (3) quickly generating a suite based on the industrial APP, associating with the Workbench project, exporting the APP project, downloading to the industrial PAD client, and verifying the communication between the industrial PAD client and the computer server.

And seventhly, communication of a three-layer architecture of the Internet of things.

The 6 training routines are integrated, the control system is monitored from the industrial PAD client side, the HMI interface of the industrial PAD client side is designed, automatic and manual monitoring can be achieved, and the system state can be displayed in a form of graphs and animations in real time.

The method specifically comprises the following steps: designing projects according to engineering practice flexibility, combining with a Hirand occupational direction concept, carrying out teaching in groups on duty, and firstly, guiding students to analyze project requirements (requirement engineers); secondly, designing a technical scheme according to requirements, and selecting proper equipment from the practical training platform to draw a network structure chart (completed by a requirement engineer and a research and development engineer together); thirdly, the concrete implementation mainly comprises PLC configuration, programming, server development, PAD client interface design and APP development (which are completed by a field engineer and a research and development engineer); and fourthly, performing program downloading, debugging and verification work (which is performed by a field engineer and a research and development engineer together). Finally, the work of the process control system is monitored from the industrial PAD client, the system operation parameters can be set on the HMI interface of the industrial PAD client, manual and automatic monitoring is realized, and the system monitoring state can be displayed in real time in the form of graphs and animations. The specific process of training is shown in fig. 6.

Compared with the prior art, the utility model provides a real platform of instructing of novel process control system has following advantage and positive effect:

1. the utility model discloses the real platform of instructing of novel process control system that the platform provided adopts the thing networking architectural design of standard, can realize the communication control of perception layer, network layer, application layer.

2. The utility model discloses the real platform of instructing of novel process control system that the platform provided, siemens S7-300 series PLC of chooseing for use belong to an industry front-line brand, have very big market share, and the student of being convenient for masters mainstream equipment application method.

3. The utility model discloses the real platform of instructing of novel process control system that the platform provided, the comprehensiveness is strong, has covered advanced industrial control and communication technology such as automated inspection and control, instrument and meter, MODBUS communication, industrial ethernet communication, computer communication, wireless communication, remote monitoring, is fit for specialty such as automation, and the real standard of teaching is carried out to the relevant course of cooperation.

4. The utility model discloses the real platform of instructing of novel process control system that the platform provided has higher advance, follows the industry APP wireless control technique in the intelligent manufacturing, can realize remote monitoring through customer end APP.

5. The utility model discloses the real platform of instructing of novel process control system that the platform provided, the PID control algorithm who uses to and realize the PID control method of digital quantity based on PWM (pulse width modulation) technique, it is extensive to use in the automatic control field, and representativeness and commonality are strong.

6. The utility model discloses the real platform of instructing of novel process control system that the platform provided has higher security, has that a key opens and stops functions such as open, short-circuit protection, earth leakage protection, alarm instruction, software protection, scram button, waterproof box overflow.

7. The utility model discloses the real platform of instructing of novel process control system that the platform provided combines the hoard occupational nature to with CDIO (engineering education) teaching theory, utilize this platform can be in proper order, directly perceived system ground teaching is real to be instructed in fact, synthesizes and tempers abilities such as student demand analysis, system design, programming research and development and debugging, can effectively improve student interest in learning and talent competition.

It should be noted that, in view of traditional real standard platform, there is the phenomenon of disjointing with actual industrial control process, for example basis exercise such as emphasizing single-machine control, and neglected the application of network communication and subassembly, compare with current traditional real standard platform, the utility model discloses a real standard platform of novel process control system is different from the control method of touch-sensitive screen or computer host computer in the past, adopts the design of standard thing networking three-layer architecture, complies with the industry APP wireless control technique in the intelligent manufacturing, uses the client to pass through wireless router and realizes remote monitoring.

It should be noted that, in view of the traditional practical training platform, the implementation of the PID automatic control algorithm has the disadvantages that the theoretical and actual connection is not tight, and the parameters are not easy to be adjusted. Compare with the real platform of instructing of current tradition, the utility model discloses a real platform of instructing of novel process control system chooses for use Siemens S7-300 series PLC to have PID controller parameter function of setting, and the debugging of being convenient for and using extensively. Fourthly, the comprehensive application and combination of system design, software programming and field debugging are not enough, and the condition of split post teaching is not provided.

The utility model discloses, as an integration siemens PLC, Profinet bus and industrial ethernet's real platform of instructing of process control system, adopt the design of standard thing networking three-layer architecture, with field bus, industrial ethernet, sensor detection, motor control, pneumatic control, new technologies such as industry APP wireless control fuse together, combine the hollander occupational performance to and CDIO teaching theory, adopt the supporting development of the teaching method of project to instruct the routine in fact, can effectively improve student's engineering practice ability, it goes to face violent employment competition environment to have more confidence.

To sum up, compare with prior art, the utility model provides a pair of novel real platform of instructing of process control system, its structural design science should instruct the liquid control process that the platform can simulate and engineering is actually very close in fact, realizes the range control to the liquid level in fact.

Furthermore, the utility model discloses a novel real platform of instructing of process control system can also simulate the liquid control process that is very close with the engineering reality, realizes the PID control based on PWM (pulse width modulation) technique to liquid temperature.

Additionally, it is right the utility model discloses, this platform fuses advanced industrial control and communication technology such as automated inspection and control, instrument and meter, MODBUS communication, industrial ethernet communication, computer communication, wireless communication, remote monitoring together. The method combines the Hirand occupational direction and the CDIO (engineering education) teaching concept, adopts a project-based teaching method to develop a practical training routine in a matching way, effectively improves the engineering practice ability and employment competitiveness of students, and has great practical significance.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A novel process control system training platform is characterized by comprising a vertically distributed experiment table body (100);

the left side and the right side of the front end of the top of the experiment table body (100) are respectively provided with an industrial PAD client (1) and a display (7);

a keyboard (5) and a mouse (6) are arranged right in front of the display (7);

an industrial network switch (8) is arranged right behind the display (7);

a wireless router (2) is arranged right behind the industrial PAD client (1);

a cabinet (3) is arranged at the lower part of the front end of the experiment table body (100);

a computer server is installed in the cabinet (3);

wherein, the computer server is respectively connected with the display (7), the keyboard (5) and the mouse (6) through data lines;

the industrial network switch (8) is respectively connected with the wireless router (2) and the computer server through network cables;

the industrial PAD client (1) carries out wireless communication through a wireless router (2);

the middle part and the rear side of the top of the experiment table body (100) are provided with a process control system;

a process control system comprising a first support (11) and a second support (15);

the first bracket (11) and the second bracket (15) are fixedly arranged at the top of the experiment table body (100);

the top of the first bracket (11) is provided with a lower water tank (12);

the top of the experiment table body (100) is arranged between the first bracket (11) and the second bracket (15) and is provided with a water pump (14);

an upper water tank (16) is arranged at the top of the second bracket (15);

the water inlet pipe (161) at the right side of the upper water tank (16) is communicated with the water outlet at the bottom of the lower water tank (12) through a water pump (14);

the water outlet pipe (162) at the central position of the bottom of the upper water tank (16) is communicated with the water inlet at the lower part of the left side of the lower water tank (12) through an electric valve.

2. The novel process control system training platform as claimed in claim 1, wherein the upper tank (16) and the lower tank (12) are placed on a square top plane of the first bracket (11) and the second bracket (15), respectively.

3. The novel process control system practical training platform as claimed in claim 2, wherein the peripheral outer eaves of the top planes of the first bracket (11) and the second bracket (15) are upwardly convex;

the upper water tank (16) and the lower water tank (12) have the same size;

the height of the bottom surface of the upper water tank (16) is higher than that of the top surface of the lower water tank (12).

4. The practical training platform of the novel process control system as claimed in claim 1, wherein a flow meter (13) is installed between the water inlet pipe of the upper water tank (16) and the water outlet of the water pump (14);

an electric valve is arranged between the water outlet pipe of the upper water tank (16) and the water inlet pipe of the lower water tank (12).

5. The novel process control system training platform as claimed in claim 1, wherein a first overflow prevention water pipe (163) leads out from the front side of the upper water tank (16) near the top;

the first overflow-preventing water pipe (163) is communicated with an overflow-preventing water tank (10) arranged on the right side of the lower part of the experiment table body (100);

the anti-overflow water tank (10) is a hollow tank body;

a second overflow-preventing water pipe (121) is led out from the position, close to the top, of the right side of the lower water tank (12), and the second overflow-preventing water pipe (121) is connected into the overflow-preventing water tank (10);

the bottom of the lower water tank (12) is provided with a drain pipe (120);

the drain pipe (120) is provided with a manual halter for draining water.

6. The novel process control system training platform as claimed in claim 5, wherein the volume of the anti-overflow water tank (10) is greater than the sum of the volume of the upper water tank (16) and the volume of the lower water tank (12).

7. The novel process control system practical training platform as claimed in claim 4, wherein a heating device (21) is installed at the lower left side of the upper water tank (16);

a temperature sensor (17) is arranged at the lower part of the left side of the upper water tank (16);

the temperature sensor (17) and a heating device (21) arranged on the upper water tank (16) keep a preset spacing distance and are arranged side by side according to the same height;

the middle lower part of the left side of the upper water tank (16) is also provided with a liquid level sensor (22);

a liquid level sensor is also arranged at the middle lower part of the left side of the lower water tank (12).

8. The novel process control system training platform as claimed in claim 7, wherein a stainless steel housing (200) is mounted on the rear side of the top of the experiment table body (100);

an upper water tank temperature monitoring instrument (231), an upper water tank liquid level monitoring instrument (232) and a lower water tank liquid level display instrument (233) are arranged on the stainless steel shell (200);

wherein, the upper water tank temperature monitoring instrument (231) is connected with a digital quantity input and output module integrated by the PLC module (32) through a signal wire;

wherein, the upper water tank liquid level monitoring instrument (232) is connected with a digital quantity input and output module integrated with the PLC module (32) through a signal wire;

wherein, the lower water tank liquid level display instrument (233) is connected with the digital quantity input and output module integrated by the PLC module (32) through a signal wire.

9. The novel process control system practical training platform as claimed in claim 8, wherein a power module (31) and a PLC module (32) are further installed in the cabinet (3);

an air circuit breaker and a leakage protector (35) are connected to a connecting circuit between the power module (31) and an external alternating current power supply;

power module (31), be connected with computer server, industrial network switch, industry PAD customer end, wireless router, PLC module, water pump, electric valve, alarm lamp, upper water tank temperature monitoring instrument, upper water tank liquid level monitoring instrument, lower water tank liquid level display instrument, flowmeter, temperature sensor, level sensor and heating device through the circular telegram wire for provide the power consumption of working for these modules.

10. A novel process control system training platform as claimed in any one of claims 1 to 9, wherein a top table of the experiment table body (100) is provided with a plurality of transverse grooves (101) longitudinally distributed at equal intervals in advance;

a plurality of longitudinal groove bodies (102) are respectively arranged on the left side and the right side of the transverse groove body (101) on the top table surface of the experiment table body (100);

the side and the back of the cabinet (3) are designed by mesh plates;

four corners of the bottom of the experiment table body (100) are respectively provided with a universal wheel (20) with a locking mechanism.

Images