Patent Application
20110037765
This application claims priority under 35 U.S.C. ยง119 to German Patent Application No. 102009037578.3 filed in Germany on Aug. 14, 2009, the entire content of which is hereby incorporated by reference in its entirety.
The disclosure relates to a method and apparatus for displaying changes in parameter values on a display surface.
The known art includes multimeters with a graphic display such as have been presented with the product designations Fluke 287 and Fluke 289 on the URL http://www.elektroniknet.de/home/messentesten/produkte/uebersicht/I/datenlogger/p/d/daten-logger-mit-trendanzeige/ on Nov. 12, 2007. Here, a plurality of measured values of one and the same measurement variable are represented as a trend.
It is known that diagnostic predictions for preventive maintenance can be derived from the correlation between time profiles of a suitable selection of parameter values. The derivation of a correlated trend from a plurality of discrete time profiles by subjective comparison of discrete graphics can be susceptible to errors and gives rise to non-reproducible results.
The precise evaluation of the time profiles with statistical methods and subsequent graphic display require a large amount of expenditure on computing, which is not available, in particular in loop-fed automation equipment.
A method is disclosed for displaying changes in parameter values on a display surface, comprising: successively sampling two values for each of two parameters at a first earlier time and a more recent second time; displaying the two successively sampled values of each parameter value as oppositely directed vectors having a common origin on, and orthogonal to, a dividing line which divides the display; plotting the two more recent sampled values and the two earlier sampled values on opposite sides of the dividing line, and highlighting an area which is enclosed by the dividing line and connecting lines between the earlier sampled value of one parameter value and the respectively more recent sampled value of the other parameter value and a connecting line between the earlier sampled value of the other parameter value and the respectively more recent sample valued of the one parameter value.
An apparatus is disclosed for sampling parameter values of a processing system, comprising: a sampling device which successively samples two values for each of two parameter values at a first earlier time and a later second more recent time; a display for displaying the two successively sampled values of each parameter value as oppositely directed vectors having a common origin on, and orthogonal to, a dividing line which divides the display wherein the two more recent sampled values and the two earlier sampled values are plotted on opposite sides of the dividing line, and an area which is enclosed by the dividing line and a connecting line between the earlier sampled values of one parameter value and the respectively more recent sampled value of the other parameter value and a connecting line between the earlier sampled value of the other parameter value and the respectively more recent sample valued of the one parameter value.
The disclosure will be explained in more detail below with reference to exemplary embodiments. In the drawings:
The disclosure relates to a method for displaying changes in parameter values on a display, which can be executed with a low degree of expenditure on equipment and an apparatus for displaying changes in parameter values on a display.
On a given display, two successive sampled values of, in each case, two parameter values can be represented as oppositely directed vectors with a common origin on, and orthogonally to, a dividing line, which divides the display into two component areas. More recent sampled values and older (i.e., earlier) sampled values of each of plural parameters can each be plotted together on opposite sides of the dividing line on the same component area. That area which is enclosed by the dividing line and the connecting lines between the respectively older sampled value of a parameter value and the respectively more recent sampled value of the other parameter value can be represented in a highlighted form.
This resulting area can be triangular for all the parameter values which are different from zero, and the area points away from the dividing line in the form of an arrow. The tip of the arrow is formed by the point of intersection of the connecting lines between the respectively older sampled value of one parameter value and the respectively more recent sampled value of the other parameter value.
If the tip of the arrow is located in the component area of the more recent sampled values, the correlated trend of the two parameter values under consideration is rising. On the other hand, if the tip of the arrow is located in the component area of the older sampled values, the correlated trend of the two parameter values under consideration is falling. The area content of the enclosed area can be a measure of the weight of the trend.
In this context, a complex relationship of the correlated linking of two time profiles can be displayed with simple geometric means having low computing requirements.
According to an exemplary embodiment of the disclosure, each highlighted area is represented in a signal color.
In addition to the shape of the enclosed area, its color can also be highlighted. This increases the visual perceptibility of the correlated trend.
According to an exemplary embodiment of the disclosure, the highlighted areas can be represented in significantly different signal colors on each side of the dividing line.
This can increase the visual perceptibility of the trend direction of the correlated trend.
In
The position pickup 10 can be connected to the rotational axis of a potentiometer in the position controller 9 and has an eyelet into which a driver on the push rod 7 engages. According to an exemplary embodiment, the position controller 9 can include a processor (e.g., a computer processor) which is configured to execute computer-readable instructions recorded on a non-transitory computer-readable recording medium, such as a non-volatile memory including a ROM, a hard disk drive, an optical memory, flash memory, etc., to perform any of the features described herein.
The position controller 9 has a display device whose essentially rectangular display 20 is illustrated in
In a first exemplary embodiment of the disclosure, the dividing line 23 can be arranged centrally on the display 20 and divides the latter into two component areas 21 and 22 with equal areas.
In an exemplary embodiment, the position of the dividing line 23 on the display 20 can be dependent on the ratio of the parameter values to one another.
In an exemplary embodiment, the dividing line 23 can be arranged horizontally on the display 20.
On the display 20, two successive sampled values P11 and P12 of a first parameter value P1 and two successive sampled values P21 and P22 of a second parameter value P2 can be represented as oppositely directed vectors with a common origin on the dividing line 23. All the vectors can be arranged orthogonally with respect to the dividing line 23.
The more recent sampled values P12 and P22 are plotted together on the component area 22, and the older sampled values P11 and P21 are each plotted together on opposite component areas 21. That area which is enclosed by the dividing line 23 and the connecting lines 24 and 25 between the respectively older sampled value P11 and P21 of the parameter value P1 or P2 and the respectively more recent sampled value P12 and P22 of the other parameter value P2 or P1 can be represented as a highlighted trend area 26.
The trend area 26 can be triangular for all those sampled values P11 to P22 of the parameter values P1 and P2 which are different from zero and points away from the dividing line 23 in the form of an arrow, wherein the tip of the arrow can be formed by the point of intersection of the connecting lines 24 and 25.
In one an exemplary embodiment of the disclosure, the trend area 26 can be highlighted in color. Use of signal colors is desirable. In particular, the representation of the trend area 26 in significantly different signal colors facilitates the visual assessment of the correlated trend. In this context, the trend area 26 which forms in the region of the first component area 21 can be represented in the color red and the trend area 26 which forms in the region of the second component area 22 can be represented in the color green.
The tendential development of the static friction of the process valve 2 can easily be seen through the inventive correlation of the transmission coefficient KP of the proportional component of the controller for the opening direction of movement of the valve as first parameter values P1 with the transmission coefficient KP of the proportional component of the controller for the closing direction of movement of the valve as second parameter values P2. In this context it is possible to provide that the trend area 26 can be represented in the signal color red when the static friction is increasing and in the signal color green when the static friction is decreasing.
It will be appreciated by those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The presently disclosed embodiments are therefore considered in all respects to be illustrative and not restricted. The scope of the invention is indicated by the appended claims rather than the foregoing description and all changes that come within the meaning and range and equivalence thereof are intended to be embraced therein.
| Number | Date | Country | Kind |
|---|---|---|---|
| 102009037578.3 | Aug 2009 | DE | national |
