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ExpMethExam2
test material
25
Mechanical Engineering
Undergraduate 4
08/03/2014

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Cards

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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