# Shared Flashcard Set

## Details

ExpMethExam2
test material
25
Mechanical Engineering
08/03/2014

Term
 Flow Rate
Definition
 Velocity of rate of volume of a moving liquid
Term
 Steamline
Definition
 The path a particle of fluid takes over time
Term
 Types of Obstruction Meter
Definition
 Ventari, Nozzle and Orfice
Term
 Two types of sensors
Definition
 Obstruction and Pitot Tube
Term
 Analog Signals
Definition
 A data value can be determined at any time and at any resolution
Term
 Digital Signals
Definition
 Data which is sampled at discreet time intervals at values mapped to a discreet scale.
Term
 Reference Voltage
Definition
 The value between successive bit representations (Interval)
Term
 Operational Amplifications (OpAmp)
Definition
 Integrated circuit chip with signal conditioning capabilities
Term
 Gain
Definition
 The factor of amplification between input and output
Term
 Sampling Theory
Definition
 Gives us guidelines on how to time our samples to accurately describe our original signal
Term
 Sampling Rate
Definition
 The number of sample data points collected over a certain time interval
Term
 Dynamic Signals
Definition
 Signals which are constantly changing in time.
Term
 Theoretical Basis
Definition
 A signal is composed of many super imposed, periodic signals of different frequency
Term
 Aliasing
Definition
 Are false frequencies that appear in the output data, simply artifacts of the sampling process. [if not sampled right a 10 Hz frequency could appear like a 20 Hz frequency.]
Term
 How to avoid aliasing?
Definition
 We can avoid aliasing by setting our sample rate to twice the highest frequency of the system [also called Nyquist Frequency], we can also set up a low pass filter [anti aliasing filter] to clean up our data output.
Term
 Pass Band
Definition
 It is the range of frequency which make it through the filter.
Term
 Filters...
Definition
 Select which parts of the signal are allowed to pass
Term
 The Nyquist Frequency
Definition
 Is twice the sampling frequency
Term
 The Euler-Bernoulli equation...
Definition
 Gives the relationship between load and transverse deflection of a beam
Term
 Bernoulli equation...
Definition
 Gives a relationship between pressure difference and velocity
Term
 The Fourier transform...
Definition
 Converts a signal from a function of time to a function of frequency
Term
 The phase of a signal...
Definition
 Describes the amount of delay between the output and input
Term
 The Bode Diagram
Definition
 Gives the frequency response of a system, Includes both the gain and phase of a system and Can be generated by evaluating the transfer function of s=jw
Term
 Difference between analog and digital data collection: Value representation
Definition
 In analog technology the information is translated into electric pulses of varying amplitude. In digital technology, translation of information is translated into binary format (zero's and one's) where each pit is representative of two distinct amplitudes.
Term
 Difference between analog and digital data collection: Time representation
Definition
 An analog system the time (and or rate is constant) graphically it can represent with a horizontal line. The digital time is represented by a sloped line because there are "steps" where the signal read must be connected.
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