JPH0820282B2 - Plant data processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a plant data processing apparatus for displaying trend of plant data on a CRT display device.

(Prior art) In various performance confirmation adjustment tests of power plants, etc.,
Various performance confirmation tests, or plant emergency stop and load cutoff tests assuming abnormal situations are performed under any operating conditions from startup to full load.

Therefore, the plant state at the time of these trial runs is accompanied by complicated changes, but in general, when an abnormal phenomenon occurs, the abnormal sign appears in each numerical value and trend waveform of the plant data before the abnormal occurrence. Begins to appear, and after that, a big change occurs, and it changes gradually with the passage of time.

It is necessary to record and analyze trend data in order to save and reproduce the trend data of these plant conditions.

The plant data processing device captures the data of the plant state at the time of trial operation in this way and reproduces the operation of the plant to grasp the plant state at the time of trial operation,
Used for parsing. For this reason, as a man-machine communication device centered on a CRT, when the trend status of plant data is displayed on the CRT and the plant data is recorded, it can be used as a man-machine with high accuracy and speed during waveform analysis and performance confirmation tests. CRT devices that perform data processing and output display are indispensable devices, and the functions required for CRT devices are also increasing.

In particular, data processing in a power plant requires swiftness in waveform analysis and performance confirmation, that is, in the performance confirmation test of a plant that changes in a short cycle of plant data, swiftness in data processing is required.

One of them is a graphic display device (hereinafter
CRT) is used to display the plant data collected in a short cycle on the CRT in trend formation, so to speak, the function of replacing the trend recorder of measuring equipment is becoming established.

(Problems to be Solved by the Invention) FIG. 4 shows a general form of a trend screen in which data of a conventional plant is recorded. The tendency of the data collected for data recording or the correlation with other data can be judged on the screen, and the function as a trend screen for data recording can be achieved. However, it is not possible to accurately read the point of interest from the waveform displayed on the trend screen, and it is necessary to make a judgment by applying a scale or scale of the scale on the horizontal axis. If it is possible to accurately read the actual measurement value at the desired time on the graph using the trend screen with data recording, it will be displayed on the CRT together with the trended waveform of data recording and the trend of data. The trend screen can be used more effectively.

As shown in Fig. 5, it is conceivable to combine and display the CRT trend graph, each point fixed in advance from the entire period of the graph, and the measured value at each time. With this method, it is possible to compare and read the tendency and the actually measured value. However, in general, instead of using a trend screen with one data measurement point, several points of data are color-coded and overlaid to display the trend of plant data itself and the relationship between data as one trend screen. . In this case, if several points of data are trend-displayed on the CRT as shown in FIG. 4, the result becomes as shown in FIG. 6, and the temporal space of the trend graph becomes narrow.

In FIG. 5, the graph pattern is specified by some operation and the digital display is limited to only one graph, and the data for the entire period corresponding to the specified trend graph is displayed in digital values in time series. . However, CR
There is a limit to the amount of data that can be displayed on the T screen itself, and it must be realized in a space of a fixed size. Seventh
When displayed as shown in the figure, the number of data displayed in time series is limited by the size of the screen, which also narrows the temporal space.

[Structure of Invention]

(Means for Solving Problems) The present invention temporarily records plant data in addition to a memory for recording plant data in an analog input unit for reading data from a plant and an output unit for reproducing the plant data, Equipped with a buffer to delay the timing by a fixed amount of time, the plant data is constantly read at a constant high-speed cycle via the analog input unit, and the plant status is recorded from the plant data recorded in the buffer and the input means that cyclically records it in the buffer. Of the plant data in the memory, and an optimum cycle determining means for determining the optimum recording cycle based on the change amount, a means for reading out the plant data delayed by a certain time in the buffer in the cycle, and recording the same in the memory. It is equipped with a reproduction unit that reads out and reproduces it via the output unit, and records it according to changes in the plant condition. By switching the period, the minimum data from the plant can be efficiently recorded in the memory, and when the recorded data in the memory is displayed on the trend graph, any point on the trend graph can be changed according to the recording cycle. The feature is that it reads the trend data with high accuracy and displays it as a digital value.

(Operation) The present invention effectively uses the space determined on the CRT screen,
It is a plant data processing device that records the plant data and reproduces it by easily obtaining the actual measurement value by switching the recording cycle with a simple operation according to changes in the plant state and specifying an arbitrary time, and it is effective. By performing simple operations on the plant data processing trend screen at arbitrary points, it is expected that the data processing CRT screen effectiveness and operability will be improved.

(Embodiment) FIG. 1 shows a block diagram of a plant data processing apparatus according to an embodiment of the present invention, in which 1 represents process signals of various analog amounts obtained from many detectors arranged in a plant. The process input part, 2 to capture is a control computer,
The process input is taken into the plant data processing device by data linking with the control computer 2, 3 is a low speed input means unit for inputting the low speed data of the process input unit 1, and 4 is for inputting the high speed data of the process unit 1. A high-speed input means unit, 5 is a process input unit for data link input with the control computer 2, and 6 is a trigger generation unit for instructing plant data collection according to a plant schedule.
Reference numeral 7 denotes data from the process input unit 1 and the control computer 2, respectively, a low speed input unit 3, a high speed input unit 4, and a process input unit 5.
A data reading logic unit for reading the data passed through, 8 is a memory for storing the read data, and 9 is a low-speed data for cyclically reading and writing the plant data from the memory 8 as a preset low-speed recording cycle. It is a writing / reading unit. 10 is a high-speed data writing / reading unit. Reference numeral 11 is a data output conversion unit that trends the plant data. Reference numeral 12 is a time series data storage memory for storing the plant data stored in the memory 8 in a separate memory in time series, and 13 is a digital value display memory for displaying digital values of the memory storing the data. , 14 is a digital data output unit, 15 is a preset low-speed digital data output unit, 16 is a preset high-speed digital data output unit, and 17 is a memory for storing time-series data in the memory 8. Is an output unit to the plant data processing output that receives the plant data stored in a different memory from the plant data that has passed through the data output conversion unit 11 and 18 controls the interrupt of the output to the screen display on the CRT 20. CRT control logic to perform, 19 is an operator console for requesting display of the screen, 21 is a light pen, 22 is a light pen 21 for time address and plant A light pen control signal control unit for converting a data address.

Each plant data from the process input unit 1 is sequentially input to the process input unit 1 by an external sensor, and the plant data is read at a constant recording cycle according to the timing generated by the trigger generation unit 6, and scale conversion is performed. After that, the plant data of the low speed recording period from the low speed input unit 3, the high speed recording period from the high speed input unit 4, and the process data of the control computer from the process input unit 5 are time-sequentially read through the data reading logic unit 7 to the memory 8 Stored in. The reading, processing and storage of the plant data are processed by the data reading logic unit 7.

The plant data in the memory stored in time series are shown in FIG. 2, and the oldest data from the set time command of the latest data, high speed data, low speed data, process input data, ... It shows the structure stored as pre-cycle data and latest data.

The plant data trend output screen displayed on the CRT20 is registered in the memory 8 and managed by the man-machine by the system builder function with the registration number etc., and in the memory 8 displayed on the CRT20 for the requested screen number. The data processing items of the recorded data in the time-series data are designated by designating the process input signal of the registered plant data processing screen.

Now, when a request to display a trend waveform output screen of plant data is made using the operator console 19 for screen display request, the content of the request from the operator console 19 is sent to the data output conversion unit 11 through the CRT control logic unit 18.
The plant data stored in the memory 8 is requested in chronological order by the man-machine with the CRT 20, and is converted into a data waveform output by the data output conversion unit 11 and output to the CRT control logic unit 18. Then, the waveform of the plant data is displayed on the CRT20.

When displayed, the memory 8 from the CRT control logic unit 18
The contents of the plant data stored in are stored in the time-series data storage memory 12 as the display request time, and the data instructed at the latest data set time. The data which is requested by the operator console 19 and which is displayed as a waveform of the plant data on the CRT 20 and the plant data stored in the time series data storage memory 12 of the memory 8 are the same. The plant data in the memory 8 is constantly updated,
The new plant data is stored one after another, and is updated cyclically at a constant cycle by the high-speed recording cycle, the low-speed recording cycle, and the process input cycle, and the memory 8 stores the latest data.

Fig. 3 is a trend waveform screen of the turbine speed of the plant, which is trend-displayed with the CRT light pen. When the actual measurement value at point A is required, call the time at point A and the actual measurement value.
It can be seen that it is 1: 30,2400RPM, but since the CRT20 scans cyclically at the recording cycle, it is insufficient as data to verify the plant performance.

Therefore, by pointing the point A with the light pen 21, the scanning timing at that point is notified to the CRT control logic unit 18, and the point A is expressed in the form of (X, Y) with the point B as the origin, = (Time) Y = (number of rotations) is obtained.

When instructed with the light pen 21, the CRT logic unit 18 causes the light pen control signal control unit 22 to subtract the number of dots from the end point to the start point of the time axis to the number of dots to the X point, and the number of dots to be scanned in one minute. Divide by.

The value obtained by this division is not the latest time at the point X, but the time obtained by calculating the recording cycle in which the scanning is performed in the recording cycle. In the light pen control signal control unit 22, the value before the recording cycle is converted into an address, and the value before the recording cycle is taken out according to the contents in the time-series data storage memory to correspond to the dot in the digital value display memory 13. Memorize the time to do.

The time is a measured value at the time requested by the light pen 21, and is converted into a digital value by the digital data output unit 14 to display the CRT20 according to the display format.
Display the time on.

In addition, the Y point indicates the value designated by the light pen 21,
The values corresponding to (X, Y) are displayed in the number table specified in the CRT display pattern, and the number table for waveform analysis can be created.

As explained above, the CRT can be operated with a simple operation of the light pen.
It is possible to display detailed time and actual measurement value by using the number of dots of.

Although the present invention is based on the number of dots per minute at the start point and the end point of the data waveform, it can be further lengthened or shortened by the zooming function of the characteristics of the CRT function, and the time can be freely changed to any unit.

〔The invention's effect〕

According to the present invention, it is possible to easily know the maximum value, the minimum value, the maximum value, the minimum value of the waveform analysis of the plant data displayed on the CRT, and the measured values of the stable time and the elapsed time corresponding to the maximum value, the minimum value, and It can read complex plant data waveforms with high accuracy, can use a wider CRT screen, and can effectively obtain the time and actual measurement value at any time by request, and display it even when it is not necessary. Without
For plant data analysis and waveform analysis, it can be used as a man-machine system for general purposes.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration example of the present invention, FIG. 2 is a structural diagram of storage in a memory of the present invention, FIG. 3 is an explanatory diagram showing a digital time display of the present invention, and FIG. Plan views showing waveform screens of plant data, FIG. 5, FIG. 6, and FIG.
The figure is a plan view of a conventional screen for digitally displaying a waveform screen of plant data. 1 ... Process input section, 2 ... Control computer 3 ... Low-speed input section, 4 ... High-speed input section 5 ... Process input section, 6 ... Trigger generation section 7 ... Data reading logic section, 8 ...... Memory 9 ...... Low speed data writing / reading unit 10 ...... High speed data writing / reading unit 11 …… Data output conversion unit 12 …… Time series data storage memory 13 …… Digital value display memory 14 …… Digital data output unit 15 …… … Low speed digital data output section 16 …… High speed digital data output section 17 …… Output section, 18 …… CRT control logic section 19 …… Operator console, 20 …… CRT 21 …… Light pen 22 …… Light pen control signal control Department

Claims (1)

[Claims] 1. A plant data processing apparatus for periodically collecting and updating plant data from each part of a plant at a predetermined sampling frequency, recording this in time series, and processing and analyzing the plant data. The memory that is updated and stored in the CRT, the CRT control logic unit that receives a display request from the operator console to display the plant data output from this memory on the CRT display screen as a trend, and the CRT control logic unit that outputs the data. When a trend display request signal is input, a data output conversion unit that converts the plant data stored in the memory into a waveform signal and displays it on the CRT, and an arbitrary point on the CRT display screen can be specified. And a coordinate pen output from the CRT control logic unit. If you enter, subtract the number of dots up to the point specified by the light pen from the number of dots sampled from the end point to the start point of the time axis on the display screen, and divide this difference by the number of dots within the specified period to obtain the time signal. And a time signal from the light pen control signal control unit are input, and the time signal and the data from the memory are uniquely associated with each other to store the data in time series. A time series storage memory, and a digital value display memory for storing time signals and data output from the time series storage memory, wherein the output of the digital value display memory is transferred to the CRT via a digital data output unit. By outputting it to the control logic section, the time at the coordinate point specified by the light pen and the measured data value are displayed near the plant data waveform. Plant data processing device and displaying at barrel number.