Medicion Definiciones

Question 1

What is resolution in the context of linear measurement systems?

Answer 1

The smallest possible physical change a device can detect

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Resolution can be theoretical or practical; practical resolution may be affected by mechanical compliance, friction, and mechanical backlash.

Question 2

How does accuracy differ from resolution?

Answer 2

Accuracy measures the difference between the actual position and the measured position of a system

Achievable accuracy depends on factors such as mechanical tolerances, backlash, load weight, and programming algorithms.

Question 3

What is repeatability in linear measurement systems?

Answer 3

The range of actual positions taken while commanded to the same location under identical conditions

Sometimes referred to as ‘repeat accuracy’; can be unidirectional or bidirectional.

Question 4

Define low resolution in linear measurement.

Answer 4

A system that cannot detect small physical changes accurately

Low resolution limits the system’s ability to measure fine movements.

Question 5

Define high resolution in linear measurement.

Answer 5

A system capable of detecting very small physical changes

High resolution is necessary for precise applications.

Question 6

What does low accuracy and low repeatability indicate?

Answer 6

Inconsistent measurements and poor system performance

This combination signifies significant issues in both measurement and reproducibility.

Question 7

What does low accuracy and high repeatability indicate?

Answer 7

Consistent measurements that are not close to the true value

The system can repeatedly return to the same position but may be offset from the actual target.

Question 8

How is precision related to repeatability?

Answer 8

Precision is synonymous with repeatability

Both terms refer to the consistency of measurements under the same conditions.

Question 9

What is the challenge in specifying a motion or measurement feedback system?

Answer 9

Finding the right balance between all components to achieve desired performance at optimal cost

A highly accurate and repeatable device cannot compensate for poor mechanical compliance or ineffective programming.

Question 10

What characterizes high accuracy and high repeatability?

Answer 10

Measurements that are both consistent and close to the true value

This is the ideal performance for linear measurement systems.

Question 11

Fill in the blank: _______ is defined as the range of actual positions the system takes while being repeatedly commanded to the same location.

Answer 11

Repeatability