JP2012058812A - Trend data management device and trend data management method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trend data management device and a trend data management method surely and minutely storing values of trend data changed instantaneously.SOLUTION: In this trend data management device, a trend data acquisition unit 11 acquires trend data of an apparatus to be monitored in a first time period. A rate-of-change determination unit 12 determines whether a rate of change between the latest trend data and the one before the latest trend data exceeds a threshold or not. A storage control unit 13 determines whether the rate of change exceeding the threshold is detected during a monitoring period in a second time period that is a longer time period than the first time period. When the rate of change exceeding the threshold is not detected, the storage control unit acquires the trend data in the second time period and, when detected, acquires the trend data in the first time period. A trend data storage unit 14 stores the acquired trend data.

Description

  Embodiments described herein relate generally to a trend data management apparatus and a trend data management method.

  Conventionally, various trend data acquired by a controller or the like is often stored in units of a long period of several months to several years for equipment maintenance and management.

  Normally, such trend data is acquired from the controller in a short period, for example, at an interval of 0.1 minute. However, if all the trend data in this short period is to be stored for a long period of time, a huge storage capacity is required. Therefore, it is often the case that only trend data having a longer time interval, for example, one minute interval is stored, and other data is deleted after being used for numerical display for real-time monitoring.

JP 2004-30599 A

  By the way, depending on the device from which the trend data is acquired, the data value may change instantaneously. For example, there is a case in which a high load is temporarily applied due to an abnormality of the power source and noise is generated.

  Such a momentary change in the data value is detected when an abnormality occurs due to an alarm or the like if the data at the time of the change exceeds a threshold value for determining an abnormality set in the system in advance. When this occurs within a range that does not reach the threshold value and within a time range of 1 minute intervals in which the trend data is stored, the change in the data value cannot be confirmed from the stored trend data.

  For example, when the saved trend data is displayed as a trend graph as shown in FIG. 6, even if the measured value changes instantaneously between “4 minutes” and “5 minutes”, The graph based on trend data at 1 minute intervals could not be recognized.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a trend data management apparatus and a trend data management method that reliably and in detail stores trend data values that have changed instantaneously.

  According to the embodiment for achieving the above object, the trend data management device includes a trend data acquisition unit, a change rate determination unit, a storage control unit, and a trend data storage unit. The trend data acquisition unit acquires the trend data of the device to be monitored at the first time period. The change rate determination unit determines whether the change rate between the latest trend data and the previous trend data exceeds a threshold value. The storage control unit determines whether a rate of change exceeding the threshold is detected during the monitoring period in the second time period that is longer than the first time period. Trend data is acquired in a cycle, and when detected, trend data in a first time cycle is acquired. The trend data storage unit stores the acquired trend data.

It is a block diagram which shows the structure of the trend data management apparatus by one Embodiment. It is a flowchart which shows operation | movement of the trend data preservation | save process of the trend data management apparatus by one Embodiment. It is a flowchart which shows the operation | movement of the display process of the trend graph of the trend data management apparatus by one Embodiment. It is a screen display figure which shows an example of the trend graph of the 2nd time period displayed on the trend graph display part of the trend data management apparatus by one Embodiment. It is a screen display figure which shows an example of the trend graph of the 1st time period displayed on the trend graph display part of the trend data management apparatus by one Embodiment. It is a screen display figure which shows an example of the conventional trend graph.

<Configuration of Trend Data Management Device According to One Embodiment>
The configuration of the trend data management apparatus 1 according to an embodiment of the present invention will be described with reference to FIG.

  The trend data management apparatus 1 according to this embodiment includes a trend data acquisition unit 11, a change rate determination unit 12, a storage control unit 13, a trend data storage unit 14, a trend graph generation unit 15, and a trend graph display unit 16. And have.

  The trend data acquisition unit 11 acquires, as trend data, a measurement value measured at a preset short-time cycle, for example, a 0.1 minute cycle, from a controller that measures a value related to the operation of the monitored device. The short time period for acquiring the trend data is defined as a first time period.

  The change rate determination unit 12 calculates the change rate between the latest trend data acquired by the trend data acquisition unit 11 and the previous trend data, and the change rate exceeds a preset threshold value. The first determination for determining whether or not is sequentially performed.

  The storage control unit 13 monitors the determination result in the change rate determination unit 12 in a preset time cycle longer than the first time cycle described above, for example, 1 minute cycle, and the change rate exceeding the threshold during the monitoring cycle. A second determination is made to determine whether or not the above has been detected. The time period for performing the second determination is defined as a second time period.

  Here, when the rate of change exceeding the threshold is not detected during the monitoring cycle, the trend data is acquired from the trend data acquisition unit 11 in the second time period during the monitoring cycle and is sent to the trend data storage unit 14. To do.

  When a rate of change exceeding the threshold is detected during the monitoring cycle, the trend data is acquired from the trend data acquisition unit 11 at the first time period during the monitoring cycle, and is sent to the trend data storage unit 14.

  The trend data storage unit 14 stores the trend data sent from the storage control unit 13.

  The trend graph generation unit 15 generates a trend graph composed of trend data for a period designated by a user operation.

  The trend graph display unit 16 is a monitor, and displays the trend graph generated by the trend graph generation unit 15.

<Operation of Trend Data Management Device According to One Embodiment>
Next, a trend data storage process and a trend graph display process will be described as operations of the trend data management apparatus 1 according to the present embodiment.

  The trend data storage process will be described with reference to the flowchart shown in FIG.

  First, the trend data acquisition unit 11 acquires trend data measured at a preset first time period from a controller that measures values related to the operation of the monitored device (S1). In the present embodiment, the first time period is a 0.1 minute period.

  Next, the change rate determination unit 12 calculates the change rate between the latest trend data acquired by the trend data acquisition unit 11 and the previous trend data, and sets the change rate as a preset threshold value. A first determination for determining whether or not it exceeds is sequentially performed (S2).

  The threshold value set in advance in the rate-of-change determination unit 12 is set for each device to be managed, and does not reach a level at which an alarm is issued as an abnormal value or the device is stopped. It is set to a value that can detect a rare change.

  Next, the storage control unit 13 monitors the determination result in the change rate determination unit 12 in a second time period that is set in advance and longer than the first time period described above. During the monitoring period, the threshold value is determined by the first determination. A second determination for determining whether or not the change rate determined to have been exceeded is performed (S3). In the present embodiment, the second time period is a one minute period.

  Here, when the change rate exceeding the threshold is not detected during the monitoring cycle (“NO” in S3), the trend data acquisition unit 11 sends the trend data at the second time cycle during the monitoring cycle. Is continuously acquired and sent to the trend data storage unit 14 (S4).

  When a change rate exceeding the threshold is detected due to some event during the monitoring period (“YES” in S3), the trend data acquisition unit 11 receives the first time period during the monitoring period (1 minute). Trend data is acquired (at intervals of 0.1 minute) and sent to the trend data storage unit 14 (S5).

  The trend data sent from the storage control unit 13 in step S5 and step S7 is stored in the trend data storage unit 14 (S6).

  At this time, the trend data acquired in the second time period and the trend data acquired in the first time period are associated with the time information and stored as separate files.

  Next, trend graph display processing will be described with reference to the flowchart of FIG.

  As described above, when the trend data is sequentially stored and the display of the trend data for a predetermined period is instructed by the user's operation (S11), the trend graph generation unit 15 stores the trend data in the trend data storage unit 14 Trend graph display information using the trend data of the second time period in the period is generated (S12).

  A marker for displaying an arrow at a position corresponding to the time at which the trend data acquired in the first time period exists is attached to the display information of the trend graph in the second time period.

  The display information of the trend graph of the second time period generated by the trend graph generation unit 15 is displayed on the trend graph display unit 16 (S13).

  An example of the trend graph of the second time period displayed on the trend graph display unit 16 is shown in FIG.

  In FIG. 4, trend data of the second time period (1-minute period) is displayed for 10 minutes, and an arrow X is displayed between 4 minutes and 5 minutes, and the measured value is instantaneously measured during this period. It is shown that the trend data of the first time period (0.1 minute period) is stored in the trend data storage unit 14.

  When the user performs an operation of selecting this arrow due to the display of the trend graph (“YES” in S14), the trend graph generation unit 15 indicates the arrow stored in the trend data storage unit 14. The trend graph display information using the trend data of the first time period between 4 to 5 minutes is generated (S15).

  The display information of the trend graph of the first time period generated by the trend graph generation unit 15 is displayed on the trend graph display unit 16 (S16).

  An example of the trend graph of the first time period displayed on the trend graph display unit 16 is shown in FIG.

  In FIG. 5, trend data of the first time period (0.1 minute period) between 4 minutes and 5 minutes is displayed. By displaying the trend graph of FIG. 5, the monitor can recognize that a non-normal change occurred instantaneously from 4.4 minutes to 4.8 minutes.

  According to the present embodiment described above, while a normal measurement value is acquired, the measurement value with a certain long time period is stored, and the measurement value with a short period only when there is an instantaneous change in the measurement value By saving, detailed measurement values when there is an instantaneous change can be saved without consuming a huge amount of storage medium capacity.

  Thus, for example, when an abnormality occurs in a device and you want to check whether there is any change in the power supply when this abnormality occurs, a trend graph with a long time period of the voltage measuring instrument of the power supply near this abnormality will be By displaying a marker such as an arrow, you can recognize that an instantaneous voltage change occurred at that time, and by displaying trend data with a short period during this time, detailed measurement can be performed. The change in value can be confirmed.

  Although the embodiment of the present invention has been described, this embodiment is presented as an example and is not intended to limit the scope of the invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 ... Trend data management apparatus 11 ... Trend data acquisition part 12 ... Change rate determination part 13 ... Storage control part 14 ... Trend data storage part 15 ... Trend graph generation part 16 ... Trend graph display part

Claims (4)

A trend data acquisition unit that acquires values relating to the operation of the monitored device as trend data at a preset first time period;
A first change rate between the latest trend data acquired by the trend data acquisition unit and the previous trend data is calculated, and it is determined whether the change rate exceeds a preset threshold value. A rate-of-change determination unit that sequentially performs the determination;
Whether or not the change rate exceeding the threshold is detected during the monitoring cycle by monitoring the determination result in the change rate determination unit in a preset second time cycle that is longer than the first time cycle. Perform a second determination to determine
When the change rate exceeding the threshold is not detected during the monitoring cycle, the trend data is acquired at the second time cycle from the trend data acquired by the trend data acquisition unit during the monitoring cycle,
When a change rate exceeding a threshold is detected during the monitoring period, a storage control unit that acquires the trend data of the first time period acquired by the trend data acquisition unit during the monitoring period;
A trend data management device comprising: a trend data storage unit that stores trend data acquired by the storage control unit. When generation of a trend graph for a predetermined period is instructed from the outside, the position corresponding to the time when the trend data acquired in the first time period exists using the trend data stored in the trend data storage unit A trend graph composed of trend data acquired at the second time period of the predetermined period with a marker attached thereto,
Further, when an operation for selecting the marker is performed, a trend graph generation unit that generates a trend graph composed of trend data of the first time period;
The trend data management apparatus according to claim 1, further comprising a trend graph display unit that displays a trend graph generated by the trend graph generation unit. Trend data management device
A trend data acquisition step of acquiring values relating to the operation of the device to be monitored as trend data at a preset first time period;
A change rate between the latest trend data acquired by the trend data acquisition step and the previous trend data is calculated, and a first determination is made as to whether or not the change rate exceeds a preset threshold value. A change rate determination step for sequentially performing the determination;
Whether the change rate exceeding the threshold is detected during the monitoring cycle by monitoring the determination result in the change rate determining step in a preset second time cycle that is longer than the first time cycle. Perform a second determination to determine
When the rate of change exceeding the threshold is not detected during the monitoring cycle, the trend data is acquired at the second time cycle from the trend data acquired at the trend data acquisition step during the monitoring cycle,
A storage control step for acquiring trend data of the first time period acquired in the trend data acquisition step during the monitoring period when a change rate exceeding a threshold is detected during the monitoring period;
A trend data management method comprising: a trend data storage step for storing the trend data acquired in the storage control step. When generation of a trend graph for a predetermined period is instructed from the outside, the position corresponding to the time when the trend data acquired in the first time period exists using the trend data stored in the trend data storage step A trend graph composed of trend data acquired at the second time period of the predetermined period with a marker attached thereto,
Further, when an operation of selecting the marker is performed, a trend graph generation step of generating a trend graph composed of trend data of the first time period,
The trend data management method according to claim 3, further comprising a trend graph display step of displaying the trend graph generated in the trend graph generation step.

Images