Biomedical Engineering Reference
In-Depth Information
2.3 What to Look for in a Sensor?
• Dynamic range
- Minimum and maximum range of the measured physical quantity
- Minimum and maximum range for electric output
• Input/output relation
• Sensitivity/Resolution
- Smallest change to be detected
• Power requirements
- Passive/active
- Power consumption/requirements
• Band width and frequency response
• Calibration process
2.3.1 Measurand Categories
1. Mechanical quantities related to solid bodies
• Position
• Navigation
• Speed and RPM
• Acceleration/vibration
• Tilt
• Distance
• Caliper dimension
• Roughness
• Thickness
• Force
• Torque
2. Mechanical quantities related to fluids (gases, liquids, and powders)
• Pressure
• Differential pressure
• Flow
• Level
3. Thermal quantities
• Temperature
• Infrared signal
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