Biomedical Engineering Reference
In-Depth Information
Table 2.1
(
continued
)
Sensor type
Advantages
Disadvantages
Strain gauge (metal)
More robust than
semiconductor strain gauges
Temperature dependence
Small k-factor compared to
semiconductor strain gauges
Strain gauge (semiconductor)
Very linear response
Vulnerable to overload
Low hysteresis
Not formable
Low creep
Temperature dependence
Large k-factor
Piezoresistive (conductive
Formable
Creep
elastomers)
Good gripping surface
Memory
Hysteresis
Temperature dependence
Piezoresistive(carbon felt and
Formable
Noise at low loads
carbon fibers)
Withstand very high
temperatures
Not suitable for miniaturizing
Withstand high overloads
Piezoelectric
Wide dynamic range
Fragility of electrical
connections
Durability
Inherently dynamic
Good mechanical material
properties
Difficulty of separating
pyroelectric/piezoelectric
effects
Pyroelectric
Wide dynamic range
Inherently dynamic
Durability
Difficulty of separating
pyroelectric/piezoelectric
effects
Good mechanical material
properties
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