Quiz 1. Measurement Principles

Question 1

Devices that can be used to make measurements of _________ and record or transmit physiological data given in quantitative (or sometimes qualitative) results

Answer 1

biological systems

Question 2

give an example of a physical way for measurement

Answer 2

(Defined or calculated)

Fluid Levels, working temperatures, heat loss, power, work.

Question 3

give an example of a biological way for measurement

Answer 3

{Less defined, Stochastic, Bias}

Stimuli and response, physiological (temperature, heat loss..), biochemical reactions, nutrition..

Question 4

give an example of a biomedical way for measurement

Answer 4

Heart Rate, Muscle Strength, Blood Pressure & Oxygen, Lung Volume, Motion, Imaging

Question 5

give an example of a enviornmental way for measurement

Answer 5

Temperature, relative humidity, air quality and composition, soil water potential.

Question 6

what are some areas of bioengineering that use bioinstruments

Answer 6

• bioelectronics-EMG, EKG
• biomechanics
• bioOptics and biomarkers

Question 7

what does a transducer do?

Answer 7

converts a signal from one form of energy to another

Question 8

what does a sensor do?

Answer 8

detects a parameter in one form and reports it in another form of energy in as a predictable value, often an electrical signal

Question 9

Name 4 things a sensor can detect changes in

Answer 9

• voltage or current
• changes in resistance
• changes in capacitance
• changes in inductance

Question 10

give general definitions for the following:

measurand:
sensor:
transducer:
signal conditioning:
analysis display
auxiliary:

Answer 10

• Measurand:
 Physical quantity measured by the instrument

• Sensor:
 A device that converts measurand to electrical signal

• Transducer:
 A device that converts one form of energy to another

• Signal Conditioning:
 Amplification, filtering, etc

• Analysis and Display:
 Digitizing, analysis of electric signals. Output Result

• Auxiliary:
 Calibration

Question 11

2 types of sensor mechanics

Answer 11

direct=measured value is proportional to an electrical signal

indirect=derive the final measurement by solving the mathematical governing equations for the system and sensor

Question 12

2 types of signal conversion

Answer 12

single, mutliple

Question 13

3 types of signal measurement

Answer 13

-static, dynamic, pulse

Question 14

define static signals

Answer 14

change very little with time. can be approximated as a zero order system

Question 15

define dynamic signals

Answer 15

result in a significant change with time

first order- thermal systems

second order- mechanical systems

Question 16

resolution

Answer 16

the smallest incremental quantity that can be measured with certainty

Question 17

reproducibility

Answer 17

the ability of an instrument to give the same output for equal inputs applied over some period of time

Question 18

REVIEW GRAPHS

REVIEW MATH EQUATIONS/FORMULAS

Answer 18

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