ITPEC FE Morning October 2018 Question 23
ITPEC FE Morning October 2018 — Question 23 of 80
Strain Gage (Sensor for Shape Change Detection) — identify the sensor used to monitor structural deformation in infrastructure.
A strain gage (тензодатчик) detects changes in shape (deformation) of structures like bridges and elevated highways.
Sensor types:
- Strain gage — measures mechanical deformation (strain) via resistance change
- Gyro — measures angular velocity / orientation (navigation, drones)
- Hall element — measures magnetic fields (position sensing, current detection)
- Thermistor — measures temperature via resistance change
Why not others:
- (a) Gyro — detects rotation, not shape change
- (b) Hall element — detects magnetic fields, not deformation
- (d) Thermistor — detects temperature, not structural strain
Key rule: "Changes in shape" = deformation = strain → strain gage.
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