Transcript Viking Pump Flow Manager

Viking Pump Flow
Manager - Phase 2
Senior Design
May 06-12
Flow Manager Overview
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Idea - to produce a specified the flow of a
viscous liquid using a positive displacement
pump without using mechanical means of
measurement.
Method - using inputs from sensors on the
pump setup, and characteristics about the liquid
itself as inputs to an algorithm, a specified
pump speed is defined to produce the specified
flow.
Disadvantages of the Current Pump
Controller
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User interface
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Lack of parts for the Flow Manager system
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Lacks the intuitiveness of common updated human interface
Input to and from the user is limited in scope.
is difficult to use
Some of the parts are custom to the device, this makes the
parts dependent on one manufacturer and increases cost of
the product
PC to Flow Manager interface
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This interface is limited in scope and ability, will not be
compatible with new Flow Manager
Main Project Goals
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Redesign the user interface so that it is easier to use and
understand
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Use eggs that can move between baskets
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Using a touch screen, custom menus may be made to fit special case
making the Flow Manager easier to use
Portable software is not confined to one specific hardware device. Making
the software portable will allow it to be used on other touch screens with
only minor modifications.
Use readily available components so that supply of parts is not limited by
one manufacture or company.
Update current features of the Flow Manager
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Update computer interface to more user-friendly, aesthetically pleasing
Possibly improve the control of the pump by using better software
techniques
Design Overview
Mechanical flow meter
for testing purposes
Software Design
•Data Hub – Responsible for interfacing
all modules of the software
•PC Comm – Provides software interface
between a PC and the Flow Manager
•Pulse Counter – Counts pulses
generated by the pump speed indicator
•Touch Screen GUI – Provides the user
with a friendly interface into the software
design
•Control Algorithm – Determines
appropriate adjustments to be made to
the operation of the pump
Data Hub to Pump
Data Hub to Control Algorithm
Data Hub to PC Comm
Data Hub to PC
Data Hub to Pulse Counter
Data Hub to Touchscreen GUI
Touch Screen GUI
Touch Screen GUI
PC GUI
PC GUI
Hardware Implementation
Circuit Design
Power Supply
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Supplies DC power
To touch screen
 To Circuit block
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Push Buttons/Relay
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Don’t allow DC to function unless switch is
close
Mounted and functioning correctly
Touch screen
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User interface & input /output signals
Input /output signals function well when
testing with an external power supply
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however difficulty exist with interfacing with the DC
drive
Functionality
Circuit Design
Circuit block
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Convert current input to voltages
Convert voltage outputs to currents
Built on breadboard; actual circuit need to be
made.
Circuit Schematics
Current to Voltage Circuit
Voltage to Current Circuit
DC Drive
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Controls speed through variable frequency AC
signal
Mounted in the box
Functions correctly when tested with external
power supply and circuit block
Problems exist when connecting to touch screen
through circuitry
Next Step
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Obtain several DACs to independently figure
out how and why the team’s design failed.
Understand how the current Flow Manager
interfaces with the DC Dive
Understand the circuitry of the DC Drive
Possible Solutions
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New QED Board ($250)
Solder new DAC ($12)
Use discrete outputs to control an external DAC
Use pulse width modulator on card
Questions?