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Instrumental Errors and Corrections Quiz

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Instrumental Errors and Corrections Quiz

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Questions and Answers

What is the main source of cyclic error in the EDM measurement system?

Crosstalk between the optical transmitter and receiver phase measurement system

The mathematical model involving the reference signal and the signal back

Electrical coupling between the reference signal and the measured signal (correct)

The length of the measurement unit

How does a measurement of more than 50m impact the cyclic error in the EDM system?

It reduces the error (correct)

It fluctuates the error

It increases the error

It has no impact on the error

What is the nature of the cyclic error along the length of the measurement unit?

It is often regarded as a sine curve (correct)

It is a parabolic curve

It is a cosine function

It is a linear function

What can be said about the contaminating signal y3 in relation to the transmitted signal y1?

It has the same phase and frequency as y1 but with a much smaller amplitude Signup and view all the answers

What happens when two waves of equal frequency are superimposed?

The resulting wave has the same frequency but different phase and amplitude Signup and view all the answers

What does the mathematical model involving the reference signal and the signal back help explain?

The effect of cyclic error Signup and view all the answers

What are the three main instrumental errors mentioned in the text?

Scale error, Cyclic error, Index error Signup and view all the answers

How is the scale of the measured distance obtained?

From the modulated frequency generated by the quartz oscillator Signup and view all the answers

What are the two components of time mentioned in relation to scale correction?

Long term and short term Signup and view all the answers

How is the long term component of time related to changes in the oscillator frequency?

It changes in accordance with changes in the oscillator frequency Signup and view all the answers

What can cause scale error apart from oscillators?

All of the above Signup and view all the answers

What type of error is caused by phase inhomogeneities due to inequalities in phase information?

Non-cyclic error Signup and view all the answers