3.2.4. Distance measurement

Try these first

1. 1.

   What does EDM stand for?

   Hint

   Think about what technology is used for measuring distances.

2. 2.

   What is the purpose of a reflecting prism in EDM?

   Hint

   It's what's hit by the signal from the EDM.

3. 3.

   What principle does EDM operate on?

   • A. Reflecting angles
   • B. Measuring time of flight of signals
   • C. Geometry

   Hint

   Think about how distance is calculated.

4. 4.

   True or False: The main application of EDM is in measuring short distances.

   • True
   • False

   Hint

   What does EDM allow for compared to manual measurement methods?

5. 5.

   An EDM measures a distance with an elapsed time of 0.002 seconds for a laser signal. How far is the object, assuming the speed of light is 300,000 km/s?

   Hint

   Use the distance formula provided during the lesson.

6. 6.

   If atmospheric conditions are causing an error of 10 mm over a distance of 1000 m, how would you calibrate your EDM to ensure accuracy?

   Hint

   Consider how calibration can correct systematic errors.