HRS-304 Level And Flow Process Control Trainer

HRS-304 Process control trainer is a multifunctional experimental device integrating automation instrumentation technology, computer technology, communication technology, fieldbus technology, automatic control technology and modern control technology according to the teaching characteristics of automation, chemical industry and related majors, and combining with the latest scientific and technological trends. 

The system can control temperature, pressure, flow, level and other process parameters by applying a variety of control strategies, and can meet the "Principles of Automatic Control", "Process Control", "Control Instrumentation", "Automatic Detection Technology and Sensors", "Computer Control" and other automation professional courses, including the object characteristics of the study, bit-type control, programme control, PID control, serial control, feed-forward control, hysteresis compensation control, solving the object characteristics of the study. control, PID control, series control, feed-forward control, hysteresis compensation control, decoupling control and other classical control. It can also provide a research platform for university researchers to conduct advanced control theory research, such as inference control, predictive control, adaptive control, expert system, fuzzy control, neural network control. In addition to meeting the needs of teaching and theoretical research, this system uses all the equipment used in the industrial field to meet the needs of cognitive teaching.

System Composition:

1, the system is designed into three tanks, one is the source water tank (in the lower part, large volume) stainless steel material, two is the control tank (in the upper part, small volume), the material is plexiglass, water tank water using a closed-circuit recycling method, a one-time injection of water without the need for an external source of water, the end of the experiment can be put back to the source tank, the source of the water tank in the lower part of the tank is connected to the drainage pipe.

2、Water level control of the tank. Realisation process: set the water level of the tank through the level transmitter to detect the actual level of liquid sent to the PLC for PID operation, the output of the standard signal control valve opening to achieve the purpose of regulating the water level, and set the high and low limits of the water level alarm.

3, pipeline pressure control. Achievement process: set the value of water pressure in the pipeline, through the pipeline installed pressure transmitter to detect the actual pipeline pressure sent to the PLC for PID operation, PLC output analogue signals to control the pump frequency converter, to achieve the stability of pressure in the pipeline, set the pressure of the high and low limits of the alarm.

4, fixed flow control. Realisation process: set a fixed flow rate value on the touch screen or computer, the system supplies water according to the set flow rate, when it is necessary to change the system flow rate, just change the flow rate value of the control terminal, and control the system flow rate size by controlling the frequency converter.

5、Water temperature control in the tank. Realisation process: the heating rod will be heating the water temperature in the tank to the set temperature, waiting for the temperature sensor detection, to reach the set temperature, stop heating, the temperature sensor will be real-time detection to ensure that the water temperature in the tank is constant.

6、Network function, the upper system adopts CP343 Ethernet interface module, which is convenient to connect with users.

Practical training projects:

1, process control system basic experiment

1,1 control system composition awareness experiments

* object hardware device structure awareness and instrumentation operation, sensor calibration (zero migration and range adjustment) experiment

* experiment software and its development platform familiarisation experiment

* control loop selection and loop connection line experiment

* Frequency conversion pump operating characteristics and flow rate relationship measurement

* Experiment on the characteristics of control valve

1,2 Determination of the mathematical model of the object

* single-capacity water tank level mathematical model determination experiment

*double-capacity water tank level mathematical model determination experiment

1.3 Experiment of bit-type temperature control

* Experiment on bit-type control of water temperature

1.4 Single-loop regulation

*Upper water tank level fixed value (follow) control experiment

* series connection double-capacity tank level control experiment

* flow meter flow rate fixed value control experiment

1.5 series level control experiment

* tank level and flow series control experiment

1.6 Ratio control system experiment

* flowmeter flow variable ratio single-loop control experiment

* flowmeter flow variable ratio double loop control experiment

2、Variable frequency constant pressure water supply experiment

* frequency conversion constant pressure water supply experiment (single inverter control)

3、Industrial control configuration software configuration control experiment

Real-time database configuration, M graphic animation, reports, curves, alarm configuration, equipment communication configuration, script application configuration and other experiments.