KR100361752B1 - Unsteady wave discrimination and analysis device of rolling motor control waveform - Google Patents

Abstract

It is an object of the present invention to determine the failure of the control system and to quickly and accurately find the cause of the failure of the control system when an error occurs in the thyristor control unit that provides the control signal to the drive motor of the hot rolling mill. To provide an abnormal wave discrimination and analysis apparatus.

The technical configuration of the present invention for achieving the above object is a signal processing unit (1) for acquiring signal waveform data for each part of the thyristor control unit 7 for controlling the rolling mill motor (9) and outputting the input and output separated from the signal processing unit ( 1) When a specific failure occurs in the data acquisition and storage unit 3, which receives the raw waveform for each part of the thyristor control unit, samples the sample data at a predetermined sampling time, and stores the sampling data, and the user request or the rolling mill DC motor thyristor control unit. High-density before and after each sampled failure in the monitor device for screen analysis based on sampling data before and after the time of occurrence of failure by receiving field control data stored in the data acquisition and storage unit 3 as a high density raw waveform through a transmission unit All data of the raw control waveform is displayed on the screen, and the screen knob It includes an information processing unit 5 for adjusting the position of the density and the wave.

Description

Unsteady wave discrimination and analysis device of rolling motor control waveform

The present invention relates to an analysis device for determining the abnormality of the signal for controlling the DC motor of the hot rolling mill, and more particularly, the failure is already progressing when the rolling state in the hot rolling mill is not normal. Abnormal wave of the rolling mill motor control waveform that collects the control signal waveform of high density and compares it with the signal waveform of the normal state in the analysis device to accurately indicate the abnormal wave or the cause of failure. A discrimination and analysis device.

In general, the rolling mill of a hot rolling line is driven by a direct current motor, and according to the precise and rapid control of the thyristor control system driving the direct current motor, the rolling mill's productivity and quality are directly affected. Therefore, in the field, the operation state of each stage of the thyristor control system is displayed on the control panel so that the manager can easily know whether there is an abnormality in the control state.

Such a control system provides a constant rolling process by providing a control value calculated by the host computer or a signal obtained from a driver's operation signal and signals obtained from sensors attached to various parts of a mechanical device to a DC motor of a rolling mill through a cable. To lose.

However, the thyristor control system controlling the rolling motor shows various abnormal conditions in all control systems because its components and control methods vary according to various unit machines. Therefore, when an abnormality occurs in the rolling process site, it is very difficult to find out the site of failure or its location without the experienced experience or expertise of related equipment.

In particular, if the rolling line continues to operate without fundamental action on the cause of the abnormal wave, abnormal condition or failure of the specific part will be spread according to the delay of prompt action on the troubled part, which will greatly affect the entire control system. Can be.

Until now, if a failure occurs in the rolling mill control system, after the failure occurs, a pen recorder or measuring instrument is installed in the facility to record data continuously on the paper, waiting for the same failure to occur, or starting up. Pause the current equipment and install the signal cable for measurement at the specific part of the control system, and then send out random test signal to find the part of each part with the signal tracer device and then before and after The failure site on the rolling mill control system has been checked by storing the data of the data and recording the contents again on the recording paper on the pen recorder for a certain time. In addition, the fault signal and the normal signal data collected by using a computer are loaded on a screen in which a certain period is listed, preparing for past data and looking for an abnormal point.

However, in the conventional analysis method, it is very complicated to compare data information in which a large amount of signals are recorded by a pen recorder for a long time and recording information on abnormal signal generation, and highly skilled techniques and techniques for accurate situation analysis. Expertise is required.

In addition, unlike the analysis on the data sheet recorded in the pen recorder, the method of tracking abnormal data by the screen requires that multiple screens be concatenated into one piece of data. The screen that automatically presents data before and after the city also presents only the result data at the time of failure, which makes it difficult to accurately analyze various failures of the control system.

The present invention is to solve the conventional problems as described above, and collects and stores a variety of control-related signals generated by the rolling mill motor thyristor control system every minute by a high-speed sampling for a certain time, when the failure occurs Detects and analyzes abnormal waves of rolling mill motor control waveforms that collects high density raw control waveforms at the time of occurrence and displays data before and after failure on one screen so that the situation before and after failure can be quickly and accurately found on one screen. It is an object of the present invention to provide a device.

1 is a block diagram illustrating the concept of the apparatus of the present invention.

2 is a detailed block diagram of a control processing unit of the apparatus of the present invention.

3 is a flowchart illustrating the operation of the apparatus of the present invention.

4 is a schematic diagram illustrating a kernel mode execution process of an apparatus of the present invention.

※ Explanation of symbols about main part of drawing ※

1: signal processing unit 3: data acquisition and storage unit

5: information processing unit 7: thyristor control unit

9: motor 11: signal acquisition unit

12: I / O separator 31: data collector

32: CPU 33: data storage

34: transmission unit 51: CPU

52: monitor 53: input unit

Technical means for achieving the above object of the present invention is a signal processing unit for acquiring signal waveform data of each part of the thyristor control unit for rolling mill motor control, and outputting the input and output separated from each other, and the raw waveform for each part of the thyristor control unit from the signal processing unit. And a data acquisition and storage unit for sampling the sample data at a predetermined sampling time and storing the sampling data, and when the user requests or a specific failure occurs in the rolling mill DC motor thyristor control unit, the field control stored in the data acquisition and storage unit as a high density raw waveform Based on the sampling data before and after the failure occurred, the data is inputted through the transmission unit to display all data of the high density raw control waveform before and after each sampled on the monitor screen for screen analysis on the whole screen, and the data is displayed by the screen knob. Density and wave It includes an information processing unit for adjusting the position of the mold.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

First, the configuration of the apparatus for tracking abnormal data of the rolling mill motor thyristor control system according to the present invention, as shown in Fig. 1, each of the thyristor control unit 7 for controlling the DC motor 9 to drive the rolling mill of the steelmaking facility largely; The signal processor 1 detects the signals of each part, and the thyristor control signal from the signal processor 1 is sampled at high speed and stored at high density, and is sampled at a predetermined sampling time requested by the user. The data acquisition and storage unit 3 for storing the data, and the data from the data acquisition and storage unit 3 are input via the local area network and displayed on the screen, and the user input value is transmitted to the data acquisition and storage unit. An information processing unit 5 is included.

The signal processing unit 1 is for electrically separating the signal acquisition unit 11 for acquiring the signal from the rolling mill motor thyristor control unit 7 and the signal output from the signal acquisition unit with the input side of the data acquisition and storage unit at the rear stage. I / O separation 12 using a photocoupler.

The data acquisition and storage section 3 includes a data collector 31 for inputting a control signal for each part of the thyristor controller input through the signal processor 1, and receives a control signal from the data collector in advance. And a CPU 32 for sampling at a predetermined sampling time interval, a data storage section 33 for storing signals sampled by the CPU, and a transmission section 34 for connection between the information processing section of the control room. .

The information processing unit 5 includes a CPU 51 for processing sampling data before and after a failure in order to receive and display abnormal state and normal state sampling data transmitted from the data acquisition and storage unit on one screen; And a monitor 52 for outputting the analysis data processed by the CPU to a screen, and a user control condition input unit 53 for inputting a user setting value and a system control routine value.

FIG. 2 is a detailed circuit block diagram of the thyristor control unit 7, wherein a detection output value of the PG 91 which generates a pulse signal according to a preset reference signal value and a rotational speed of the motor 9 is a speed controller. The controller 70 is configured to output an adjustment value at 71 and the speed reduction adjustment signal value output from the speed controller 71 is a current variation value detected at each current sensor 82 and 81 at the current controllers 72 and 73, respectively. The current adjustment value is outputted in comparison with the current controller, and the output values of the current controllers 72 and 73 are compared with the respective line voltage values applied to the motor by the voltage controllers 74 and 75, respectively. Value is outputted, and the output value of the voltage controllers 74 and 75 is provided as a gating signal of the thyristors 78 and 79 for motor output control through respective GPGs (gate pulse generators 76 and 77). Doing .

Here, symbols a to m represent checkpoints of signal waveforms for each stage.

Referring to the operation of the present invention configured as described above in detail as follows. As shown in FIG. 4, the processor of the data acquisition and storage unit of the present invention divides and executes the user mode (ⓐ) and the kernel mode (ⓑ). The kernel mode is again an input / output for processing a user mode request. The control process (©), the memory process (d) for managing the high density raw control waveforms, and the data acquisition process (ⓔ) for performing the user's registered sampling function are executed.

Here, the acquisition of the control signal is carried out in kernel mode to perform a scan task for data acquisition in order to ensure the absolute sampling time, and to occupy and process the CPU 32 in preference to any other task performed in kernel mode. Use an interrupt board (ⓕ) to connect a separate data acquisition card (ⓘ).

On the other hand, the signal acquisition unit 11 output of the signal processing unit 1 for picking up the thyristor control signal is passed through the input / output separation unit 12 composed of a photocoupler insulation card for electrically isolating the input and output of the signal and the data acquisition unit and It is transmitted to the storage unit 3. The input from the signal processing unit is input to the CPU 32 through the high speed signal data collection unit 31, and the raw waveforms for the control signals are acquired as high density data according to the built-in high speed sampling program, and the data storage unit 33 Are kept.

The high density storage data of the thyristor control unit outputs the data stored in the graph form on the monitor screen when the data output through the screen is requested by the CPU 51 of the information processing unit 5.

In detail, in the user mode ⓐ of FIG. 4, the signal acquisition unit of the signal processing unit 1 extracts field signals a to m for monitoring each unit of the thyristor control unit that will output a control signal to the motor. To obtain the actual data.

At this time, the data is acquired by sampling the same signal 0.1 [ms], 1 [ms], 20 [ms] in order to broaden the analysis, and the data storage location, that is, the data storage part ( 33) For example, 50,000 units of 0.1 [ms], 10,000 units of 1 [ms], and 6,000 units of 20 [ms] are stored continuously in the form of high-density primitive waveforms as soon as they occur. High-density data sampled at high speed by a signal (a signal for requesting data at a time) is stored in the failure data storage unit 33.

Subsequently, 0.1 [ms], 1 [ms], and 20 [ms] sampling data are displayed on the screen by the call of the user's data from the information processing unit including the monitor.

In an embodiment of the present invention, the signals (a to m) of each part of the thyristor control unit of a rolling mill are displayed in the form of waveforms and rolling signals formed on the screen by combining all signals adjusted to be suitable for control signal analysis. 0.1 [ms] sampled data for 4 seconds before failure, 1 second after occurrence, 1 [ms] sampled data for 9 seconds before failure, 1 second after occurrence, 20 [ms] sampling data before occurrence Data for 119 seconds and 1 second after occurrence were displayed.

As a result, when the failure occurs and the abnormal control phenomenon is displayed on demand, the slab is subjected to several rolling mills during the rolling operation. 10 seconds of data screen in 1 [ms] sampling unit for analyzing the detailed flow of data, and 0.1 [ms] 5 seconds of sampling data for analyzing the mutual shape between pulse and control signal waveform are displayed on one screen.

The high-density analysis screen for non-steady wave discrimination is a screen in which all 13 control points of 6,000 data for 120 seconds are sampled by 20 [ms] sampling of the control waveform at the time of failure of the rolling mill motor control unit stored in the system data acquisition and storage unit when a failure occurs. By presenting, it is possible to identify the signal that causes the failure. For tracking purposes, other signal selection switches in addition to the identified fault cause providing signal are turned off on the monitor screen, and when the cause providing signal is identified, the number of knobs on the screen can be adjusted to detect an abnormal wave provided for the first time. .

When the analysis is completed, the control panel (control card) is presented on the screen by the panel switch for action so that the bad card that caused the abnormal wave in the control system can be immediately checked and replaced.

As described above, the present invention provides a sampling cycle of 0.1 [ms], 1 [ms] and 20 [ms] by the user's selection of the thyristor control signals when a failure or abnormal operation occurs in the thyristor control system for motor control of the rolling control system. Tracks the waveforms in the normal state and abnormal state on the screen according to the time zone, finds the cause of signal promptly and accurately, repairs or replaces the control card of the relevant part, and traces the delay of the countermeasures to the fault It can prevent the adverse effects to other facilities due to the difficulty and improve the productivity and quality of the product.

Claims (1)

In the high density collection and abnormal wave discrimination analysis apparatus of the hot rolling mill motor control raw waveform of the steelmaking facility, the signal waveform (a ~ m) of each part of the rolling mill motor thyristor control unit 7 is input through the signal acquisition unit 11 A signal processing unit (1) including an input / output separation unit (12) for electrically separating and outputting the same; The CPU 32 which receives the signal waveform of each part of the thyristor controller from the signal processor 1 through the data collector 31 and samples at a high speed with a user-specified sampling time value, and the high density sampling data in the kernel mode sampled here. A data acquisition and storage unit 3 including a data storage unit 33 for temporary storage; When the user's request or abnormal waveform is generated through the input unit 53, the CPU 51 for processing abnormal data stored in a high density in the fault data storage unit to the waveform of each unit and processing them to be displayed on one screen for each selected mode. An abnormality wave determination and analysis device for a rolling motor control waveform, characterized in that the information processing section (5) comprising a monitor 52 for receiving the data processed by the CPU and displaying the processing result.