JPH046965B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a transient phenomenon record analysis device suitable for recording transient phenomena of main parameters when an event occurs in a plant such as a nuclear power plant.

[Technical background of the invention]

For example, in a nuclear power plant, early investigation of the cause of an event is an important point in safely operating the power plant. In order to analyze an event, the data of the main plant parameters collected at the time of the event is output as a plot of multiple signals on the same time axis.However, the number of signals that can be plotted simultaneously is limited by the plot. Limited by paper width. That is, if all signals are plotted at the same time, if the number of signals becomes large, the plots will be output on the same time axis, and the signals will overlap, making it impossible to plot all data at the same time. Also,
If the width of the plot paper is simply made wider, the paper becomes difficult to handle, the output device becomes larger, and a large space is required, so there are restrictions on the width of the plot paper.

For this reason, in the past, fixed signal groups set in advance were automatically plotted while recording them when an event occurred, and after recording was completed, the operator selected the necessary signals related to the event and manually plotted and analyzed them. Ta.

[Problems with background technology]

However, since the parameters to be recorded and analyzed differ depending on the type of event, according to the conventional method described above, it takes time for the operator to select the necessary signals. Particularly when the number of signals exceeds 100, this selection process becomes overwhelming, resulting in the problem of time-consuming analysis.

By the way, as a device that can automatically select plant data based on events, Japanese Patent Application Laid-Open No. 55-150009
There is a technique shown in the publication. However, in this technique, the process data and the abnormality detection signal from the plant are input separately, so it is difficult to synchronize these data. In addition, it is not suitable for actual plants because it becomes impossible to respond when multiple events occur.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a transient phenomenon record analysis device that can quickly output necessary data without placing a burden on the operator when an event occurs.

[Summary of the invention]

The present invention divides input signals into groups corresponding to events in advance, and when an event actually occurs, automatically selects the signals in that group and outputs a plot. This allows only the data needed at the time of the event to be output. It is designed so that you can obtain it without delay.

[Embodiments of the invention]

The present invention will be explained below with reference to an embodiment shown in FIG.

Input signals S ₁ to _{S o} from the plant consist of analog signals and contact signals. The input signals S ₁ to _{S o} are converted into digital data D ₁ to D _o by the process input device 1 and input into the process computer. The input digital data is temporarily stored in the main memory buffer area 3 in response to a scan command signal from the data controller 2, allowing the event detection section 4 to refer to the digital data. In response to the event detection command signal from the data controller 2, the event detection section 4 detects an event in the digital data temporarily stored in the main memory buffer area 3, and switches the switch 5.
control. After the digital data is referenced in the event detection section 4, the digital data in the main memory buffer area 3 is transferred to the auxiliary memory 6 and stored therein in response to a command from the data controller 2. Parameter group selection section 7 is used to automatically select process signals to be automatically plotted when an event occurs.
A parameter group (hereinafter referred to as preset) is selected based on the event signal received from the event detection section 4, and the selected parameter group is notified to the data bus control section 8. When an event occurs, the selection buffer 9 transfers all the digital data in the auxiliary memory 6, and selects the digital data to be plotted based on the preset notified to the data bus control section 8. A plot output section 10 plots the digital data selected by the selection buffer 9 onto an output device 11.

Next, the operation of this embodiment configured as described above will be explained. The event detection unit 4 takes out digital data from the main memory buffer area 3,
In the case of an analog signal, a comparison check with a preset limit value is performed, and in the case of a contact signal, a status check is performed to detect an event. The digital data in the main memory buffer area 3 referenced by the event detection section 4 is transferred to the auxiliary memory 6 and stored therein. Switch 5 is normally open, but
When an event is detected in the event detection section 4, it is closed, and the digital data in the auxiliary memory 6 is sent to the sorting buffer 9 through the switch 5.

At this time, the parameter group selection unit 7 selects the event signal S _i (1≦i
≦n), the preset P _i corresponding to the event is taken out from the plot preset table 12 shown in FIG. 2a. In the plotting preset table 12, preset numbers P1 to _P0 to be output when an event occurs are set corresponding to the sequence _of input signals _S1 to _S0 . Next _, referring to _the preset information table 13 shown in _FIG .
Max) to the data bus control unit 8. As shown in FIG. 3, the sorting buffer 9 stores data stored in the auxiliary memory 6 for all points D ₁ to _D
be transferred. The data bus control unit 8 selects data D _i1 -D _in of the signals S i1 _{-S in} set in the preset P _i from among all the transferred data points. The selected data is sent to a plot output section 10 and plotted on an output device 11.

〔Effect of the invention〕

As described above, according to the present invention, by dividing signals corresponding to events into groups in advance and registering those signals in a table, when an event actually occurs, the necessary signals can be generated without delay. Only accurate data can be obtained. As a result, unnecessary confusion and confusion are avoided, and moreover, the operator's operation of selecting a necessary signal is reduced. In particular, immediately after an event occurs, operators are extremely busy, so the effect of reducing operations at this point is extremely large, and in addition, accurate judgment can be made.

Furthermore, in the present invention, all input process data is temporarily stored in the main memory, and events are determined by the event detection means by referring to this data, so that the abnormality detection signal of the plant and the process data can be It is possible to avoid mismatching synchronization timing.

Furthermore, in the present invention, all input process data is stored in the auxiliary memory, and all data is retained up to the point immediately before selection, so that it is possible to respond to multiple events.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a transient phenomenon record analysis device showing an embodiment of the present invention, FIGS. 2 a and b are configuration diagrams of its automatic plot item selection table, and FIG. 3 is a processing method for its selection buffer, etc. It is an explanatory diagram. DESCRIPTION OF SYMBOLS 1... Process input device, 2... Data controller, 3... Main memory buffer area, 4... Event detection section, 5... Switch, 6... Auxiliary memory, 7... Parameter group selection section, 8 ...Data bus control section, 9...Selection buffer,
10...Prot output unit, 11...Output device, 1
2... Preset table for plotting, 13...
Preset information table.

Claims (1)

[Claims] 1. In a transient phenomenon recording and analysis device that outputs a plot of process data necessary for analysis when an event occurs in a plant, a process input means that inputs process data from the plant in accordance with a scanning command signal, and a process that inputs the input process data. A memory for temporarily storing data; an event detecting means for determining an event by referring to the process data stored in this memory; and after the process data is referenced by the event detecting means, the process data is stored in the memory. an auxiliary memory for storing predetermined process data; a means for retrieving predetermined process data from the process data stored in the auxiliary memory in response to an event determined by the event detection means; What is claimed is: 1. A transient phenomenon recording and analysis device comprising means for outputting a plot of each process data.