02/25/00
Microsense II Model 5300 Gaging System - 45
Microsense
TM
II Model 5210
Velocity and Acceleration Module
Velocity and Acceleration Functions
Velocity if the first derivative of displacement. So, as expected, the
5210 module uses a differentiator circuit to produce its velocity signal.
Any circuit that calculates the first derivative has a gain that increases
linearly with frequency. Therefore, the bandwidth of such a stage must
be limited for two reasons. First, infinite bandwidth requires infinite
gain, and second, infinite gain would produce infinite noise. As a
practical matter, it is important to limit the bandwidth of any such circuit
to keep noise within reasonable bounds.
Acceleration is the second derivative of displacement. By cascading
two differentiator circuits, the Model 5210 calculates acceleration. The
gain of any circuit that calculates the second derivative increases with
the square of the frequency. Therefore, it is even more important to
limit bandwidth.
Velocity & Acceleration Outputs
The velocity output is scaled at 1000 times the full-scale displacement
range per second. For example, a gage with a full-scale range of
±100
µ
m would have a velocity output of ±100 mm/second full scale.
The acceleration output is scaled at 1,000,000 times the full-scale
displacement range per second squared. For example, a gage with a
full-scale range of ±100
µ
m would have a velocity output of ±100
m/sec
2
full scale.
Model 5210 Front Panel
5210
5210
ACCELERATION
VELOCITY
DISPLACEMENT
OVERRANGE
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