Process index management system based on DCS

Abstract

The invention discloses a DCS-based process index management system, which comprises a detection unit, an ERDB database unit and a DCS human-computer interaction interface unit, and is characterized in that the ERDB database unit is connected with the detection unit and the DCS human-computer interaction interface unit; the detection unit is used for detecting working information of field equipment, the ERDB database unit is used for processing the working information and generating visual display information, the DCS human-computer interaction interface unit is used for displaying the visual display information, and the ERDB database unit comprises a display module, a signal judgment module, a signal conversion module and the like; the DCS human-computer interaction interface unit comprises an instrument position number button, a DCS picture instrument display interface module, an instrument display historical trend interface module, a DCS picture process index offset prompt interface module and the like. The management system is simple in structure, integration and unified display of various display interfaces on the human-computer interaction interface are achieved, process index deviation can be conveniently found in time, and effective deviation correction measures are taken.

Description

Technical Field

[0001] The present invention relates to the field of instrument control, and in particular to a process index management system based on DCS. Background Art

[0002] In modern industrial production, equipment equipped with Honeywell's PKS (Process Knowledge System) enables real-time monitoring of its operating status. Operating data and status information for these devices are typically displayed using PID (Proportional-Integral-Derivative) graphs. Each area has specific critical process indicators, and the operating values ​​of these indicators are displayed on the corresponding PID graph. Because the main control operators in various positions need to monitor and reference a large number of PID graphs, they are forced to frequently switch between different PID graph interfaces to obtain the required information. This cumbersome operation method significantly consumes the operator's time and energy.

[0003] When process indicators exhibit anomalies, such as deviations from the alarm range, operators may be unable to detect these anomalies promptly because they need to switch between multiple PID graphs. Failure to promptly detect and implement corrective measures can not only impact production efficiency and reduce process stability, but can also create safety hazards, threatening the continuity and safety of the entire production process. Summary of the Invention

[0004] The main purpose of the present invention is to provide a process index management system based on DCS, thereby overcoming the deficiencies in the prior art.

[0005] To achieve the aforementioned object of the invention, the technical solutions adopted by the present invention include: The present invention provides a process indicator management system based on DCS, comprising a detection unit, an ERDB database unit and a DCS human-machine interaction interface unit, wherein the ERDB database unit is connected to the detection unit and the DCS human-machine interaction interface unit respectively; the detection unit is used to detect working information of field equipment, the ERDB database unit is used to process the working information of field equipment and generate visual display information, and the DCS human-machine interaction interface unit is used to display the visual display information, wherein the ERDB database unit at least comprises a display module, a signal judgment module, a signal conversion module, a signal accumulation module, and a password management module which are interconnected; and the DCS human-machine interaction interface unit at least comprises an instrument position number button, a DCS screen instrument display interface module, an instrument display history trend interface module, a DCS screen process indicator deviation prompt interface module, a DCS screen deviation frequency interface module, and a DCS password input interface module which are interconnected.

[0006] In some specific embodiments, the detection unit includes multiple sensor modules, each of which is connected to the ERDB database unit. The operating information of the field device includes at least flow rate, pressure, liquid level, temperature, and pH value. Preferably, the multiple sensor modules are three sensor modules, respectively disposed at the top, middle, and bottom of the field device.

[0007] In some more specific solutions, the instrument position number button is connected to the device screen number preset in the ERDB database unit, and is used to hyperlink to the corresponding device position according to the device screen number to obtain the working information of the corresponding device position.

[0008] In some more specific solutions, the display module is electrically connected to the detection unit for processing the working information of the field equipment and generating visual display information, and the DCS screen instrument display interface module is electrically connected to the display module for displaying the visual display information.

[0009] Specifically, the display module is used to receive electrical signals, set performance parameters, and convert the electrical signals into monitoring signals required by field equipment values. The performance parameters include range and unit. The DCS screen instrument display interface module is used to display the monitoring signals in the form of a screen.

[0010] Furthermore, the instrument display historical trend interface module is electrically connected to the DCS screen instrument display interface module and is connected to the RTDB database unit for displaying the changing trend of the visual display information and storing the changing trend in the RTDB database unit.

[0011] Specifically, the instrument display historical trend interface module is used to display the change trend of the monitoring signal in the form of a screen, and store the change trend in the RTDB real-time database.

[0012] Preferably, the storage rate of the RTDB database unit is once every 30 seconds.

[0013] Furthermore, the signal determination module is electrically connected to the display module and configured to compare a preset information value with the operating information of the field device and output a comparison result. The DCS screen process indicator deviation prompt interface module is electrically connected to the signal determination module and configured to display the comparison result. Specifically, the signal determination module is configured to compare a preset signal value with the monitoring signal and output a comparison result.

[0014] Furthermore, the DCS screen process indicator deviation prompt interface module is a monochrome display screen, which can display the first color and the second color according to the comparison result.

[0015] Furthermore, the system also includes a logic judgment module and a switch control module. The logic judgment module is electrically connected to the signal judgment module, and is used to perform logic judgment on the comparison result output by the signal judgment module, and transmit the judgment result to the switch control module. The switch control module is set on the valve of the on-site equipment, and is used to control the opening and closing of the valve according to the judgment result.

[0016] Preferably, the switch control module is a solenoid valve.

[0017] Furthermore, the signal conversion module is electrically connected to the signal judgment module, and is used to convert the comparison result into a digital monitoring signal and accumulate the digital monitoring signal. The DCS screen offset frequency interface module is electrically connected to the signal accumulation module, and is used to read the digital monitoring signal and count the process offset frequency.

[0018] Specifically, the signal conversion module is used to convert the corresponding monitoring signal into a digital monitoring signal according to the comparison result, and is also used to accumulate the digital monitoring signal.

[0019] Furthermore, the password management module is electrically connected to the signal accumulation module and is used to clear the digital monitoring signal in the signal accumulation module according to a preset digital password. The DCS password input interface module is electrically connected to the password management module and is used to input a digital password.

[0020] Compared with the prior art, the advantages of the present invention include at least: First, the DCS-based process indicator management system provided by the present invention integrates all key process indicator ranges that require strict monitoring and real-time data into a unified interface. At the same time, it can call up the corresponding process curve chart and PID interface to perform relevant statistical analysis. The steps are simple, saving the operator's time and energy.

[0021] Second, in the DCS-based process indicator management system provided by the present invention, the signal determination module is electrically connected to the display module, configured to compare a preset information value with the operating information of the field equipment and output the comparison result. The DCS screen process indicator deviation prompt interface module is electrically connected to the signal determination module, configured to display the comparison result. When a process indicator deviates, operators can quickly take effective corrective measures, thereby ensuring the stability and safety of the entire production process and preventing production accidents caused by process indicator deviations. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of a process index management system based on DCS provided by an embodiment of the present invention. 1. Detection unit; 2. ERDB database unit; 3. DCS human-computer interaction interface unit; 4. RTDB real-time database; 21. Display module; 22. Signal judgment module; 23. Signal conversion module; 24. Signal accumulation module; 25. Password management module; 31. Instrument position number button; 32. DCS screen instrument display interface module; 33. Instrument display historical trend interface module; 34. DCS screen process indicator offset prompt interface module; 35. DCS screen offset frequency interface module; 36. DCS password input interface module. DETAILED DESCRIPTION

[0023] In view of the shortcomings of the prior art, the inventors of this case, after long-term research and extensive practice, have proposed the technical solution of the present invention. The following will further explain this technical solution, its implementation process and principles.

[0024] Please refer to Figure 1 A process indicator management system based on DCS includes a detection unit 1, an ERDB database unit 2, and a DCS human-computer interaction interface unit 3. The detection unit 1 is composed of three sensor modules, which are thermal elements and are respectively installed at the top, middle and bottom of the equipment to be detected, so as to monitor the temperature conditions of the on-site equipment in real time and output the three detected temperature values ​​in the form of electrical signals. The ERDB database unit 2 includes a display module 21, a signal judgment module 22, a signal conversion module 23, a signal accumulation module 24 and a password management module 25, which are used to process the data of the on-site equipment. The DCS human-computer interaction interface unit 3 includes an instrument position number button 31, a DCS screen instrument display interface module 32, an instrument display historical trend interface module 33, a DCS screen process indicator offset prompt interface module 34, a DCS screen offset frequency interface module 35 and a DCS password input interface module 36, providing operators with intuitive operation and monitoring means. The above modules are connected by wires.

[0025] In this solution, the instrument tag button 31 is linked to the device screen number preset in the ERDB database unit 2. This configuration can trigger a custom script that quickly hyperlinks to the corresponding device location based on the device screen number, thereby obtaining relevant information at that location. Specifically, custom scripts include Pushbutton, Textbox, Trend, Checkbox, and others. After the device screen number is written to the Pushbutton script, clicking the instrument tag button 31 will navigate to the corresponding device location, allowing for rapid control and adjustment of process indicators. This makes switching between different PID diagram interfaces very convenient, saving operators time and effort.

[0026] In this solution, the display module 21 is electrically connected to the three sensor modules, responsible for receiving electrical signals and setting corresponding performance parameters. The performance parameters include at least a range and a unit. Specifically, for liquid level, the range is 0-100, unit: %; for pressure, the range is 0-1.6, unit: MPa. Specifically, for liquid level measurement, the range is 0-100, and the unit is expressed in %; and for pressure measurement, the range is set to 0-1.6, and the unit is expressed in MPa. The DCS screen instrument display interface module 32 is electrically connected to the display module 21, and displays the monitoring signal in the form of a screen, allowing operators to easily monitor the operating status of the equipment. The instrument display historical trend interface module 33 is electrically connected to the DCS screen instrument display interface module 32 and is connected to the RTDB real-time database 4. It can display the changing trend of the monitoring signal through the screen and store these changing trends in the RTDB real-time database 4 at a storage rate of once every 30 seconds. Historical data can be stored for up to one year, facilitating long-term analysis and evaluation.

[0027] In this solution, the signal judgment module 22 is electrically connected to the display module 21, and is used to compare the preset signal value with the size of the monitoring signal, and output the comparison result. Generally, the preset signal value is set according to the process requirements. When the monitoring signal is greater than or equal to the preset signal value, the signal judgment module 22 outputs a "1" value, indicating that the process indicator is not within the normal range; and when the monitoring signal is less than the preset signal value, it outputs a "0" value, indicating that the process indicator is normal. The DCS screen process indicator offset prompt interface module 34 is electrically connected to the signal judgment module 22, and is used to display the comparison result. The DCS screen process indicator offset prompt interface module 34 is usually a monochrome display screen, which displays green according to the output "1" value and red according to the "0" value. This color prompt method allows the operator to understand at a glance whether the process indicator has offset, so that the operator can take corresponding measures.

[0028] In this solution, the process indicator management system also includes a logic judgment module and a switch control module. The logic judgment module is electrically connected to the signal judgment module 22, and is used to perform logical judgment on the "1" and "0" values ​​output by the signal judgment module 22. When two or more of the three electrical signals are "1" values, the logic judgment module transmits the signal corresponding to the "1" value to the switch control module. The switch control module is set on the valve of the on-site equipment. When the signal corresponding to the "1" value is received, the switch valve connected to the switch control module is opened or closed according to the pre-set information. The pre-set information is two signals, "1" and "0". When the "1" signal is received, the open command is executed; when the "0" signal is received, the close command is executed. The switch control module usually adopts a solenoid valve.

[0029] In this solution, the signal conversion module 23 is electrically connected to the signal judgment module 22, and is used to convert the monitoring signal corresponding to the "1" value into a digital monitoring signal and accumulate it. The DCS screen offset frequency interface module 35 is electrically connected to the signal accumulation module 24, and is used to read the digital monitoring signal and count the process offset frequency. The DCS screen offset frequency interface module 35 directly references the name and pin name of the monitoring signal to read the relevant data. Such a design can accurately locate and obtain the required information. The signal accumulation module 24 is responsible for maintaining the record of the process offset frequency that has been counted. Whenever an offset occurs in the process, the signal accumulation module 24 will accumulate the original accumulated value, thereby ensuring the real-time and accuracy of the offset frequency statistics.

[0030] In this solution, the password management module 25 is electrically connected to the signal accumulation module 24 and is used to reset the digital monitoring signal in the signal accumulation module 24 according to a preset digital password. The DCS password input interface module 36 is electrically connected to the password management module 25 and is used to enter a digital password, facilitating operator access. To reset the process indicator offset frequency, the administrator simply enters the correct password into the DCS password input interface module 36, and the offset frequency is reset. If an incorrect password is entered, the reset operation will be unavailable.

[0031] In summary, in the present invention, the sensor module adopts DCS distributed management. When the three sensor modules are able to operate normally, the equipment can be managed and controlled. When one of the sensor modules fails to work normally, as long as the other two sensor modules meet the preset conditions, normal equipment management and control can still be carried out, which solves the problem of needing manual information transmission; through the DCS human-machine interaction interface unit, the equipment parts that do not meet the conditions can be understood in real time, and the operation of the equipment can be adjusted in time according to the status of the DCS human-machine interaction interface unit.

[0032] It should be understood that the above embodiments are merely illustrative of the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent variations or modifications made in accordance with the spirit and substance of the present invention are intended to be encompassed within the scope of protection of the present invention.

Claims

1. A process index management system based on DCS, characterized in that: The system comprises a detection unit, an ERDB database unit and a DCS human-machine interaction interface unit, wherein the ERDB database unit is connected to the detection unit and the DCS human-machine interaction interface unit respectively; the detection unit is used to detect the working information of the field equipment, the ERDB database unit is used to process the working information of the field equipment and generate visual display information, and the DCS human-machine interaction interface unit is used to display the visual display information, wherein the ERDB database unit at least comprises an interconnected display module, a signal judgment module, a signal conversion module, a signal accumulation module, and a password management module; the DCS human-machine interaction interface unit at least comprises an interconnected instrument position number button, a DCS screen instrument display interface module, an instrument display history trend interface module, a DCS screen process indicator deviation prompt interface module, a DCS screen deviation frequency interface module, and a DCS password input interface module.

2. The process index management system based on DCS according to claim 1 is characterized in that: The detection unit includes multiple sensor modules, all of which are connected to the ERDB database unit. The working information of the field equipment includes at least flow, pressure, liquid level, temperature, pH value, and / or the multiple sensor modules are three sensor modules, which are respectively arranged at the top, middle and bottom of the field equipment.

3. The process index management system based on DCS according to claim 1 is characterized in that: The instrument position number button is connected to the device screen drawing number preset in the ERDB database unit, and is used to hyperlink to the corresponding device position according to the device screen drawing number to obtain the working information of the corresponding device position.

4. The process index management system based on DCS according to claim 1 is characterized in that: The display module is electrically connected to the detection unit for processing the working information of the field equipment and generating visual display information. The DCS screen instrument display interface module is electrically connected to the display module for displaying the visual display information.

5. The process index management system based on DCS according to claim 4 is characterized in that: The instrument display historical trend interface module is electrically connected to the DCS screen instrument display interface module and is connected to the RTDB database unit, and is used to display the changing trend of the visual display information and store the changing trend in the RTDB database unit, and / or the storage rate of the RTDB database unit is once every 30 seconds.

6. The process index management system based on DCS according to claim 4 is characterized in that: The signal judgment module is electrically connected to the display module, and is used to compare the preset information value with the working information of the field equipment and output the comparison result. The DCS screen process indicator offset prompt interface module is electrically connected to the signal judgment module, and is used to display the comparison result.

7. The process index management system based on DCS according to claim 6 is characterized in that: The DCS screen process indicator deviation prompt interface module is a monochrome display screen, which can display a first color or a second color according to the comparison result.

8. The process index management system based on DCS according to claim 6 is characterized in that: It also includes a logic judgment module and a switch control module. The logic judgment module is electrically connected to the signal judgment module and is used to perform logic judgment on the comparison result output by the signal judgment module and transmit the judgment result to the switch control module. The switch control module is set on the valve of the field equipment and is used to control the opening and closing of the valve according to the judgment result. And / or, the switch control module is a solenoid valve.

9. The process index management system based on DCS according to claim 6 is characterized in that: The signal conversion module is electrically connected to the signal judgment module, and is used to convert the comparison result into a digital monitoring signal and accumulate the digital monitoring signal. The DCS screen offset frequency interface module is electrically connected to the signal accumulation module, and is used to read the digital monitoring signal and count the process offset frequency.

10. The process index management system based on DCS according to claim 9 is characterized in that: The password management module is electrically connected to the signal accumulation module and is used to clear the digital monitoring signal in the signal accumulation module according to a preset digital password. The DCS password input interface module is electrically connected to the password management module and is used to input a digital password.

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