Kaman KD-2300 - Manual (Page 10)

KD-2300 Instruction Manual Part I: What is the KD-2300?
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Part I: What is the KD-2300?
System Technology
Kaman Precision Products’s KD-2300 family of displacement measuring
systems uses inductive technology to determine the position of a target
relative to the system sensor.
An AC current flows through the sensor coil, generating an
electromagnetic field that radiates out from the sensor. As the
conductive target enters this field, the sensor induces a current flow; it
produces a secondary opposing field, reducing the intensity of the
original. This opposing electromagnetic field results in an impedance
variation in the sensor coil.
The sensor coil makes up one leg of a balanced bridge network. As the
target changes position within the sensor field, the bridge network
senses impedance changes in the sensor coil and passes the information
on to signal conditioning electronics for conversion to an analog
voltage. This voltage is directly proportional to target displacement.
SYNC HRONOUS
D EMODU LATOR L OG AMP
CONVERTER
OUTPU T
AMP.
TARGET
REF COIL
ACTIVE COIL
CABLE CAPACITANCE
COARSE LINEARITY
ZERO ADJUST
ANALOG
VOLTAGE OUT
GAIN
ADJUST
FINE
LINEARITY