2022-07
file: spotwave_instructions_manual.docx
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Feature
Description
ALIN
Burst signal peak amplitude in units of µV.
D
Burst signal duration: Time difference of the last crossing of the detection threshold and the
first crossing of the detection threshold
R
Burst signal risetime: Time difference between the time of occurrence of the peak amplitude
and the time of the first threshold crossing
E
Burst signal energy: Integral of the squared acoustic emission signal voltage within the
duration of the burst signal
CNTS
Burst signal counts: Number of positive threshold crossings in upward direction
RMS
Acoustic emission signal root mean square: Root mean square of the acoustic emission
signal within the period of 1 second. A hit’s RMS is taken from the actual status data set’s
RMS (identified as RMSS in VisualAE).
TS
Burst signal arrival time: Time of the first threshold crossing of a burst signal
TRAI
Transient recorder index: database key of transients in the transient data file used as
common key in the primary data file.
16.5.
Command Set
The spotWave is a USB CDC (Communications Device Class) device and can be controlled with serial
commands.
Windows uses the usbser.sys driver by default, which exposes a virtual COM port. If the Vallen AE Suite
Software is installed, a setup information file for the spotWave device (C:\Vallen\Drivers\spotWave\vspwv1.inf)
is installed to use the low-level and stable winusb.sys driver. The driver can be uninstalled manually to use the
default usbser.sys driver and the virtual COM port as an easy interface (see 16.5.5).
Every command has to be terminated with a newline character “\n” (ASCII value 10 or 0x0A).
Syntax conventions:
Convention Information
<>
Angle brackets indicate values entered by the programmer
|
“Or” indicates a choice of one element from a list
[]
Square brackets indicate that the enclosed items are optional
{}
When several items are enclosed by braces, one, and only one of these elements must be
selected
~
A tilde indicates a valid range of values
