National Instruments BridgeVIEW 用户手册
Chapter 14
Arrays, Clusters, and Graphs
14-22
© National Instruments Corporation
Wait Until Next ms Multiple function (Functions»Time & Dialog)—
In this exercise, this function ensures the For Loop executes every
0.25 seconds (250 ms).
In this exercise, this function ensures the For Loop executes every
0.25 seconds (250 ms).
Numeric constant (Functions»Numeric)—You also can pop up on the
Wait Until Next ms Multiple function and select Create Constant to
automatically create and wire the numeric constant.
Wait Until Next ms Multiple function and select Create Constant to
automatically create and wire the numeric constant.
Array Max & Min function (Functions»Array)—In this activity, this
function returns the maximum and minimum temperature measured
during the acquisition.
function returns the maximum and minimum temperature measured
during the acquisition.
Mean VI (Functions»Analysis»Probability and Statistics or
Functions»Base Analysis for LabVIEW Base Package
users)—Returns the average of the temperature measurements.
Functions»Base Analysis for LabVIEW Base Package
users)—Returns the average of the temperature measurements.
Bundle function (Functions»Cluster)—Assembles the plot
components into a cluster. The components include the initial X value
(0), the delta X value (0.25), and the Y array (temperature data). Use
the Positioning tool to resize the function by dragging one of the
corners.
components into a cluster. The components include the initial X value
(0), the delta X value (0.25), and the Y array (temperature data). Use
the Positioning tool to resize the function by dragging one of the
corners.
The For Loop executes 40 times. The Wait Until Next ms Multiple
function causes each iteration to take place every 250 ms. The VI
stores the temperature measurements in an array created at the For
Loop border (auto-indexing). After the For Loop completes execution,
the array is passed on to the subVIs and
function causes each iteration to take place every 250 ms. The VI
stores the temperature measurements in an array created at the For
Loop border (auto-indexing). After the For Loop completes execution,
the array is passed on to the subVIs and
Temp Graph
.
The Array Max&Min function returns the maximum and minimum
temperature. The Mean VI returns the average of the temperature
measurements.
temperature. The Mean VI returns the average of the temperature
measurements.
Your completed VI bundles the data array with an initial X value of 0
and a delta X value of 0.25. The VI requires a delta X value of 0.25 so
that the VI plots the temperature array points every 0.25 seconds on the
waveform graph.
and a delta X value of 0.25. The VI requires a delta X value of 0.25 so
that the VI plots the temperature array points every 0.25 seconds on the
waveform graph.
3.
Return to the front panel and run the VI.
4.
Save the VI as
Temperature Analysis.vi
in the
BridgeVIEW\
Activity
directory.
End of Activity 14-4.