JP2007033071A - Trend graph display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To visibly compare measurement data of a current day with measurement data of the previous day, to reduce processing for depicting a graph, and to grasp the time of a day and a change in measurement data even if a time scale is not checked. <P>SOLUTION: A fixed axis of 0 to 24 o'clock is used as a time axis. Each time a prescribed time period (one hour for example) elapses, a present position line L1 for showing present time is displayed so as to make a right angle with the time axis (refer to Figs. (a) and (b)). In this event, the oldest display data (D1 old) are deleted from an image plane to display the latest display candidate data (D2 new) on the position line L1. Further, previous day's display data (D2 old) displayed till then are shifted to the right to provide a blank part h1 between the display data and the position line L1, and the display data (D2 old) are left as measurement data one cycle before. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a trend graph display device that displays measurement data such as heat quantity, flow rate, outgoing water temperature, return water temperature, etc., in particular, a graph showing changes over time.

Conventionally, an integrating calorimeter has been used in order to grasp the amount of heat supplied from a heat source used for an air conditioning service, or to charge a bill according to the provided air conditioning service.
The integrated calorimeter not only measures the instantaneous value of heat and holds the data, but also can measure and hold the accumulated heat every hour for at least 24 hours. Therefore, if the accumulated heat quantity measured every hour for 24 hours is graphed, a daily heat quantity supply (or consumption) pattern is obtained, and analysis of this will improve the operation of the air conditioning equipment. Can do.

Therefore, in the conventional system, measurement data for 24 hours (integrated calorie for each hour) stored in the integrated calorimeter is sent to the central management device by communication, and the data is analyzed by the central management device. The result was processed and displayed as a trend graph on a relatively large monitor (see Patent Document 1).
JP-A-8-190423

  However, recently, not a large-scale system using such a central management device but a small-scale system that displays a trend graph with a small display unit provided in the integrated calorimeter itself is desired. In this case, a small display unit of the integrated calorimeter itself cannot provide detailed display like a large monitor in terms of space and display function. For this reason, it is generally considered that a trend graph is displayed in the following manner.

[Display method 1]
For example, as shown in FIG. 10A, one day from 0:00 to 24:00 is a display target time zone, the time axis indicating the display target time zone is a first axis (horizontal axis), and the first axis The second axis (vertical axis) orthogonal to the data axis is the data axis indicating the data value, and the measurement data (cumulative heat amount per hour) from 0:00 to the present is plotted using the time axis and the data axis as the base axes. Connect measurement data with a broken line. The display of this line graph (trend graph) is repeated every day. When displaying the trend graph for the next day, the trend graph for the previous day is cleared.

[Display method 2]
For example, as shown in FIG. 11 (a), the current time is fixed at the right end of the graph, the measurement data from the current measurement data (integrated heat amount per hour) to 24 hours ago is plotted, and connected by a broken line. Every time new measurement data is obtained, all displayed data are shifted on the display screen to display new measurement data, and at the same time, the time display on the time axis is updated (see FIG. 11B).

[Problems with Display Method 1]
In the case of the display method 1, since the trend graph for the previous day is cleared, the measurement data for the current day and the previous day's measurement data except for the case where the current time is 24:00 (see FIG. 10B). Cannot be compared on the graph.

[Problems with Display Method 2]
If display method 2 is used, data for one cycle (24 hours) is always displayed, but the measurement data for the current day (measurement data for the current time and measurement data near the current time) and the measurement data for the previous day are displayed. (Measurement data at the current time one cycle before and measurement data near the current time one cycle before) are located at the end of the graph, respectively, so that the visibility when comparing the measurement data of the current day with the measurement data of the previous day Is bad.
In addition, every time new measurement data is obtained, the time display on the time axis is updated. Therefore, unless the time scale is confirmed, it is impossible to grasp the change of the time of day and measurement data.
In addition, every time new measurement data is obtained, it is necessary to shift the entire trend graph, and the processing for drawing the graph increases.

  The present invention has been made to solve such a problem, and the object of the present invention is to compare the measurement data of the day with the measurement data of the previous day with good visibility. It is an object of the present invention to provide a trend graph display device that requires less processing for drawing and can grasp changes in the time of day and measurement data without checking the time scale.

  In order to achieve such an object, according to the present invention, a periodically repeated time zone is set as a display target time zone, a time axis indicating the display target time zone is a first axis, and a second time orthogonal to the first axis. In a trend graph display device in which an axis is a data axis indicating a data value of measurement data measured at a predetermined time interval, and measurement data in a display target time zone is graphed and displayed using the first axis and the second axis as a base axis Orthogonal to the first axis, a current position display means for moving and displaying a current position line indicating the current position in the display target time zone every time a predetermined time elapses, and each time the current position line moves, Means for erasing old display data from the screen and displaying the latest display candidate data on the screen is provided.

According to the present invention, the current position line indicating the current position is displayed orthogonal to the first axis (time axis). For example, if the display target time zone is one day from 0:00 to 24:00, a predetermined time ( For example, every time 1 hour), the current position line moves on the first axis in units of 1 hour. Each time the current position line moves, the oldest display data is erased from the screen, and the latest display candidate data is displayed on the screen.
Thus, with the current position line as the boundary, the measurement data for the current day (measurement data for the current time and measurement data near the current time) and the previous day's measurement data (the measurement data for the current time one cycle before and the current data for the previous cycle) Measurement data in the vicinity of the time).
In this case, since most of the measurement data is fixedly displayed on the screen, the processing for drawing the graph can be reduced.
In this case, the display target time zone is a fixed time zone from 0 o'clock to 24 o'clock, and the time position on the time axis does not change, so the time of day is measured without checking the time scale. It becomes possible to grasp changes in data.

In the present invention, the time zone that is periodically repeated is set as the display target time zone, but is not limited to one day from 0:00 to 24:00, and one hour from 0 to 60 minutes is set as the display target time zone. Alternatively, one week may be set as the display target time zone. That is, in the present invention, the display target time zone may be a time zone in which a similar tendency appears in the measurement data (a time zone in which similar events are repeated).
In the present invention, data such as heat quantity, flow rate, outgoing water temperature, return water temperature and the like are assumed as measurement data, but it is of course applicable to other data displays. In the case of heat quantity or flow rate, it is also assumed that the integrated heat quantity or integrated flow rate per unit time is used as measurement data, or the instantaneous heat quantity or instantaneous flow rate is used as measurement data.

  Moreover, in this invention, you may display the 1st auxiliary line which shows the upper limit with respect to measurement data orthogonal to a 2nd axis | shaft, or may display the 2nd auxiliary line which shows a minimum. In this way, for example, when there is a large divergence between the measurement data of the current day displayed close to the current position line and the measurement data of the previous day, normal / abnormal with respect to those measurement data Can be easily confirmed.

According to the present invention, the current position line indicating the current position in the display target time zone is moved and displayed every time a predetermined time elapses, and every time the current position line moves. Since the oldest display data is erased from the screen and the latest display candidate data is displayed on the screen, for example, when one day from 0:00 to 24:00 is set as the display target time zone, Measurement data for the current day (measurement data for the current time or near the current time) and measurement data for the previous day (measurement data for the current time one cycle before or near the current time one cycle ago) Data) is displayed, and the measurement data of the current day and the measurement data of the previous day can be compared with high visibility.
Further, since most of the measurement data is fixedly displayed on the screen, the processing for drawing the graph can be reduced. Also, the display target time zone is a fixed time zone from 0 o'clock to 24 o'clock, and the time position on the time axis does not change, so the time of day and changes in measurement data can be confirmed without checking the time scale. Can be grasped.

  Further, according to the present invention, by displaying at least one of the first auxiliary line perpendicular to the second axis and indicating the upper limit for the measurement data and the second auxiliary line indicating the lower limit, for example, the current position line is displayed. When there is a large divergence between the measurement data of the current day and the measurement data of the previous day that are displayed close to each other at the boundary, it is possible to easily confirm normality / abnormality with respect to those measurement data.

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram of an integrated calorimeter showing an embodiment of a trend graph display device according to the present invention.
The integrated calorimeter 1 includes a process signal input unit 2, a sampling unit 3, a CPU 4, a RAM 5, a ROM 6, a display unit 7, and interfaces 8 and 9. The display unit 7 is a liquid crystal and its display space is small.

  The process signal input unit 2 includes an analog interface circuit that captures an analog signal, a digital interface circuit that captures a digital signal, and the like. The process signal input unit 2 captures a process signal indicating the amount of heat supplied from a heat source used for air conditioning service. This is supplied to the sampling unit 3.

  The sampling unit 3 samples a process signal sent via the process signal input unit 2 at a preset sampling cycle, and sends this to the CPU 4 as a process value (sampling data) in a digital signal format.

  The CPU 4 takes in the process value from the sampling unit 3 via the interface 8 and operates according to the program stored in the ROM 6 while accessing the RAM 5. The ROM 6 stores a trend graph display program that graphs and displays measurement data (in this example, an integrated heat amount per hour) as a program unique to the present embodiment.

[Embodiment 1]
Hereinafter, processing operations executed by the CPU 4 according to the trend graph display program stored in the ROM 6 will be described with reference to the display examples shown in FIGS.
The CPU 4 takes in the process value from the sampling unit 3 via the interface 8 and stores this process value in the RAM 5 as an instantaneous value of the amount of heat supplied. Then, the instantaneous value of the supplied heat amount is integrated every hour, and the integrated integrated heat amount per hour is stored in the RAM 5 as measurement data, and is displayed in a graph on the display unit 7.

[Day 1]
FIG. 2A is a display example of measurement data on the display unit 7 after one hour has elapsed since the start of measurement at 0:00. In this case, the CPU 4 sets one day from 0 o'clock to 24 o'clock as the display target time zone, the time axis indicating this display target time zone (the fixed axis at 0-24 o'clock) as the first axis (horizontal axis), The second axis (vertical axis) orthogonal to the first axis is the data axis indicating the data value, and the display unit 7 displays the accumulated heat amount from 0 o'clock to 1 o'clock with the time axis and the data axis as the base axis at 1 o'clock. Plotted as measurement data and connected with measurement data at 0 o'clock (in this example, zero) by a broken line. Further, the CPU 4 displays a current position line L1 indicating the current position in the display target time zone, orthogonal to the time axis. In this case, the current position line L1 is displayed at the 1 o'clock position on the time axis.

  FIG. 2B is a display example of measurement data on the display unit 7 after two hours have elapsed since the start of measurement at 0:00. In this case, the CPU 4 moves the current position line L1 that has been displayed at the 1 o'clock position to the 2 o'clock position, and plots the integrated heat amount from 1 o'clock to 2 o'clock as measurement data at 2 o'clock. The measurement data at 1 o'clock is connected by a broken line.

  Hereinafter, similarly, every time 1 hour elapses, the CPU 4 moves the current position line L1 to the next time position, plots the measurement data, and connects them with a broken line. FIG. 2C shows a display example of measurement data on the display unit 7 after 24 hours have elapsed since the start of measurement at 0:00.

[Day 2]
Next, when the current time is 1 o'clock on the next day (second day), the CPU 4 moves the current position line L1 to the 1 o'clock position in the display target time zone (see FIG. 3A) and displays the oldest display. The data (display data D0old at 0 o'clock on the previous day (see FIG. 2C)) is deleted from the screen, and the latest display candidate data (in this example, measurement data D1new at 1 o'clock on the current day) is displayed on the current position line L1. ) Is displayed. Note that the display data D0new (D24old) at 0:00 on the current day is displayed after the oldest display data erased from the screen (display data D0old at 0:00 on the previous day). Further, the display data D1old at 1 o'clock on the previous day displayed at that position until then is shifted to the right, and a blank portion h1 is provided between the current position line L1 and left as measurement data one cycle before.

  Next, when the current time is 2 o'clock, the CPU 4 moves the current position line L1 to the 2 o'clock position in the display target time zone (see FIG. 3B), and the oldest display data (on the day of 1 o'clock). Display data D1old) is erased from the screen, and the latest display candidate data (in this example, measurement data D2new at 2 o'clock on the current day) is displayed on the current position line L1. It should be noted that the display data D2old at 2 o'clock the previous day displayed at that position is shifted to the right and a blank portion h1 is provided between the current position line L1 and left as measurement data one cycle before.

  Similarly, the CPU 4 moves the current position line L1 to the next time position every time one hour elapses, erases the oldest display data from the screen, and displays the latest on the current position line L1. The display candidate data is displayed, and the operation of shifting the display data that has been displayed at that position so far to the right as the measurement data one cycle before is repeated. FIG. 3C shows a display example of measurement data on the display unit 7 after 12 hours on the second day have elapsed.

As can be seen from the above description, according to the present embodiment, measurement data for the current day (measurement data for the current time and measurement data near the current time) and measurement data for the previous day (1 Measurement data of the current time before the cycle and measurement data near the current time of the previous cycle) are displayed, so that the measurement data of the current day and the measurement data of the previous day can be compared with high visibility.
Further, according to the present embodiment, the oldest display data is erased on the screen, the latest display candidate data is displayed on the current position line L1, and the display data that has been displayed at that position until now is displayed on the right. Since it is only shifted to the side and most of the measurement data is fixedly displayed, the processing for drawing the graph can be reduced.

  In addition, according to the present embodiment, the display target time zone is a fixed time zone from 0 o'clock to 24 o'clock, and the time position on the time axis does not change, so even if the time scale is not confirmed, 1 It becomes possible to grasp the time of day and changes in measurement data. That is, the heat consumption usually changes in the same pattern every day, and the administrator can easily determine the normal pattern and the pattern in which an abnormality has occurred by looking at the trend data on a fixed time axis of the day.

  Further, according to the present embodiment, since the measurement data of one cycle before is displayed with the blank portion h1 provided between the current position line L1, the measurement on the day displayed with the current position line L1 as a boundary. The data and the previous day's measurement data can be easily distinguished, and the visibility is further improved.

  In addition, as shown in FIG. 4, the 1st auxiliary line H1 which shows the upper limit with respect to measurement data orthogonally to a data axis (2nd axis) is displayed, or the 2nd auxiliary line H2 which shows a minimum is displayed. May be. In this way, when there is a large divergence between the measurement data of the current day displayed close to the current position line L1 and the measurement data of the previous day, normal / abnormality is determined with respect to those measurement data. It can be easily confirmed.

  In the above-described embodiment, the measurement data is the accumulated heat amount per hour, but may be the accumulated flow amount per hour, or the instantaneous heat amount, instantaneous flow rate, outgoing water temperature, return water temperature, etc. These data may be used as measurement data, and can be applied to other data displays in the same manner.

  In the above-described embodiment, only the integrated heat quantity is displayed as a graph as measurement data. However, a plurality of measurement data may be displayed as a graph on the same screen. FIG. 5 shows an example in which the instantaneous heat quantity ENG and the instantaneous flow rate FLW are displayed as graphs on the same screen as measurement data. FIG. 6 shows an example in which the incoming water temperature TS and the return water temperature TR are displayed as graphs on the same screen as measurement data. When displaying the instantaneous flow rate or the instantaneous heat amount, for example, the current position line L1 is moved every 30 minutes, and the measurement data is plotted.

  When displaying a plurality of measurement data in a graph, the change in the data can be grasped even on a display device with a low resolution by individually setting a range for each measurement data. By changing the range of the past data by changing the range, the past data can be analyzed accurately.

  In the above-described embodiment, the display target time zone is one day from 0 o'clock to 24 o'clock, but the time zone in which a similar tendency appears in the measurement data (time zone in which similar events are repeated periodically) It is sufficient that one hour from 0 to 60 minutes is set as the display target time zone, or one week may be set as the display target time zone. Moreover, although it is a long time slot | zone, it is good also considering a year as a display object time slot | zone.

In the above-described embodiment, the measurement data of one cycle before remaining as display data is displayed with the blank portion h1 provided between the current position line L1, but the blank portion h1 is not necessarily provided. Also good.
In the above-described embodiment, the time position from 0 to 24:00 is displayed on the time axis. However, since the time position on the time axis does not change, the display of the time position from 0 to 24:00 is omitted. Good.

  In the above-described embodiment, the cumulative calorimeter has been described as an example, but it is needless to say that the present invention is not limited to the cumulative calorimeter. The present invention is effective for realizing display of a trend graph on a small display screen, and is effective when applied to an apparatus with a small display space such as an integrating flow meter. Of course, the present invention can also be applied to a large screen display device.

[Embodiment 2]
In the above-described embodiment, the blank portion h1 is provided between the current position line L1 and the measurement data of the previous cycle is displayed. However, the measurement data of the previous cycle is not displayed. Also good. For example, as shown in FIGS. 7A and 7B, when the current time is 3 o'clock, the current position line L1 is moved to the 3 o'clock position in the display target time zone, and the previous day is displayed as the oldest display data. The display data D3old at 3 o'clock may be erased from the screen, and the latest display candidate data (in this example, measurement data D3new at 3 o'clock on the current day) may be displayed on the current position line L1.

[Embodiment 3]
Further, as shown in FIGS. 8A and 8B, measurement data is not displayed on the current position line L1, for example, when the current time is 3 o'clock, the current position line L1 is displayed in the display target time zone. The 3 o'clock display data D3old of the previous day is erased from the screen as the oldest display data, and the latest display candidate data is displayed at the 2 o'clock position where the current position line L1 has existed. The measurement data D2new at 2 o'clock on a certain day may be displayed.

  FIG. 9 shows a modification of the third embodiment. In FIG. 8, the measurement data is plotted on the screen and connected by a broken line. However, the data may be plotted stepwise as shown in FIG. In FIG. 9, the current position line L1 is moved every 30 minutes, and the data plot area width is 2 dots. By doing so, it is not necessary to connect the plotted data with a broken line, and the processing is simplified.

  FIG. 9A is a display example when the current time is 23:30, the current position line L1 is moved from the previous 23:00 position to the 23:30 position, and the previous day 23:30. Display data (oldest display data) Dold is erased from the screen, and the measurement data (latest display candidate data) Dnew of the current day at 23:00 is displayed at the position where the current position line L1 has existed until then. .

  FIG. 9B is a display example when the current time is 00:00 (24:00), and the current position line L1 is moved from the previous 23:30 position to the 00:00 position. The display data (oldest display data) Dold of the previous day at 00:00 is erased from the screen, and the latest measurement data of 23:30 (the latest display candidate data Dnew) at the position where the current position line L1 has existed until then. Is displayed.

  FIG. 9C shows a display example when the current time is 00:30. The current position line L1 is moved from the previous 00:00:00 position to 00:30, and the previous day 00:30. Display data (oldest display data) Dold is erased from the screen, and the measurement data (latest display candidate data) Dnew of the current day is displayed at the position where the current position line L1 has existed until then. .

It is a block block diagram of the integrating | accumulating calorimeter which shows one embodiment of the trend graph display apparatus which concerns on this invention. It is a figure which shows the example of a display (1st day) for demonstrating the processing operation of CPU in this integrated calorimeter. It is a figure which shows the example of a display (2nd day (Embodiment 1)) for demonstrating the processing operation of CPU in this integrated calorimeter. It is a figure which shows the example which displayed the 1st auxiliary | assistant which shows the upper limit with respect to measurement data orthogonally to a data axis, and the 2nd auxiliary line which shows a minimum. It is a figure which shows the example which displayed the instantaneous heat amount and the instantaneous flow rate on the same screen as measurement data. It is a figure which shows the example which carried out the graph display on the same screen as measured water and return water temperature. It is a figure explaining the other example of a display (Embodiment 2) in this integrated calorimeter. It is a figure explaining the other example of a display (Embodiment 3) in this integrated calorimeter. FIG. 10 is a diagram for explaining a modification of the third embodiment. It is a figure explaining the display method 1 generally considered as a display method of the trend graph in the display part of a small space. It is a figure explaining the display method 2 generally considered as a display method of the trend graph in the display part of a small space.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Integrated calorimeter, 2 ... Process signal input part, 3 ... Sampling part, 4 ... CPU, 5 ... RAM, 6 ... ROM, 7 ... Display part, 9, 10 ... Interface, L1 ... Current position line, h1 ... Blank Part, H1, H2 ... auxiliary lines.

Claims (3)

A time zone that is periodically repeated is set as a display target time zone, a time axis indicating the display target time zone is a first axis, and a second axis perpendicular to the first axis is measured at predetermined time intervals. In the trend graph display device which displays the measurement data of the display target time zone in a graph with the first axis and the second axis as a base axis, and a data axis indicating a data value,
Orthogonal to the first axis, a current position display means for moving and displaying a current position line indicating a current position in the display target time zone every time a predetermined time elapses;
A trend graph display device comprising: means for deleting the oldest display data from the screen each time the current position line moves and displaying the latest display candidate data on the screen. In the trend graph display device according to claim 1,
A trend graph display device comprising: means for displaying at least one of a first auxiliary line indicating an upper limit and a second auxiliary line indicating an upper limit for the measurement data orthogonal to the second axis. In the trend graph display device according to claim 1 or 2,
The trend graph display device, wherein the display target time zone is a 24-hour time zone starting from a predetermined time.

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