Instruction Manual

MicroShockDetector plus
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The measuring points are continuously recorded with 500 Hz per channel and filtered to an upper
limit frequency of 25 Hz and a lower limit frequency of 1 Hz. The shock pulses are selected from
this curve. A shock impact starts exceeding the registration threshold on at least one measurement
channel and ends when the main thrust (channel with the absolute maximum of shock) changes sign
(zero crossing) or all 3 channels fall below the registration threshold again. Within a curve duration
of 4 s, several shock impacts can occur, for example, by vibration.
The impact with the largest amplitude is evaluated at the end of a curve period and compared with
the configured criteria. A shock curve is permanently stored if the registration thresholds met on at
least one measurement channel, shock strength and shock duration for this shock impact.
Figure 17: Evaluation of shock events
As a shock event is considered the largest single impact within the sampling time of 4 s, which
meets all the set conditions (amount of shock, shock strength, shock duration) (in this example Figure
17 Impact 1). In addition to the measurement of the 3 channels, a value for the space vector and
integrated value for the shock strength of this impact are calculated at each measurement point.
The shock strength is equivalent to the difference speed.
Space vector:  

󰇛

   󰇜
Shock strength:  

  


Impact 1
Impact 2
Figure 18: MicroShockDetector plus main axis for acceleration
y
z
x
Space vector
X axis
Y axis
Z axis