Lesson 1 - Force, Stress, and Strain

Topics:

Units of force; Static forces; Elasticity; Strain gauges; Gauge factor; Gauge configurations; Other force-measuring devices

Learning Objectives:
– Define force, stress, strain, and deformation in terms of the English and SI units used for their measurement.
– Describe the relationship between stress and strain (Hooke's law).
– Describe the operation and construction of various kinds of strain gauges.
– Identify the electrical circuits used with strain gauges.
– Describe the piezoelectric effect and the capacitance mat and discuss typical applications.

Lesson 2 - Weight and Mass Measurement

Topics:

Weight vs. mass; Acceleration; Spring scales; Balances; Load cell scales; Hydraulic, LVDT, and pneumatic load cells; Batch scales

Learning Objectives:
– Define and compare weight and mass, including SI and English units.
– Explain the relationship between a mass and the acceleration of that mass.
– Discuss Newton's first law of motion.
– Describe spring scales, equal-arm balances, and unequal-arm balances.
– Discuss the operating principles governing load cells.
– Describe the operation and application of industrial batch scales.

Lesson 3 - Weighing Materials in Motion

Topics:

In-transit weights; Belt-scale systems; Roller scales; Nuclear scale operation; Radiation detectors; Weigh feeders

Learning Objectives:
– Name the parts of a belt scale and explain how a typical belt scale operates.
– Discuss the use of roller scales.
– Describe the scale comparison, calibration chain, and electronic integrator methods of calibrating in-transit scales.
– Explain how radiation detectors work and describe the operation of a nuclear scale.
– Describe how continuous weigh feeders operate and discuss typical applications.

Lesson 4 - Position Measurements

Topics:

Micrometers; Dial indicators; Potentiometers; Tracer systems; Variable-reluctance transducer; Proximity detection; Air gauging; Moving-coil transducer; LVDT gauge; Inspection gauging

Learning Objectives:
– Describe how micrometers and dial indicators are used to gauge an object and to make a position measurement.
– Explain how precision potentiometers, tracer systems, variable-reluctance transducers, and proximity detectors measure linear position.
– Describe how air gauging is used to measure inside and outside diameters.
– Discuss the operation and uses of LVDT gauge heads.
– Explain how typical rotary potentiometers, synchros, and code disks converters operate.
– Discuss applications for extensometers and full-field devices.

Lesson 5 - Acceleration, Vibration, and Shock

Topics:

Speed vs. velocity; Radar devices; Machine tool control; Linear and angular acceleration; Accelerometers; Vibration; Balancing machinery

Learning Objectives:
– Compare speed and velocity and calculate speed from distance and time.
– Explain how the accelerometer works.
– Contrast direct and indirect speed measurement and give examples of each.
– Discuss the operation of LVDT, potentiometric, and piezoelectric accelerometers.
– Describe the undesirable effects of vibration and discuss ways of preventing them.