Transcript Mini Baja Car Data Aquasistion System

Mini Baja Car Data Acquisition
System
Kendrick Burnett
Cody Notaro
Project Objectives
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Retrieve data on engine, clutch temperature
and input shaft of transmission and input
data into excel so that the information can be
analyzed and used to determine the optimal
clutch setup.
Retrieve data from displacement sensors to
determine the reactions of the shocks to
different terrains and events. Data will then
be used to determine the shock valving
necessary.
Displacement Sensor
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Displacement sensors
will be mounted in line
with the shocks so that
they may measure the
travel during a normal
run of the car.
The Shock is the same
on all four corners.
Thermal and Hall Effect
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The thermal sensor
will be mounted on
the clutch cover so
that we may
monitor the
temperature of the
clutches.
The hall effect
sensor will be
mounted on the
transmission cover
so we may monitor
the input shaft RPM.
Engine RPM
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The Engine RPM
sensor will wrap
around the spark
plug wire to monitor
the RPM during a
test run.
Sensor Location
Specifications
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4 Displacement Sensors
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1 Rotational Sensor
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200 – 4200 RPM
+/- 50 RPM
1 Engine RPM Sensor
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0 – 6.5 inches front
0 – 7 inches rear
+/- ¼ inch
1200 – 3600 RPM
+/- 50 RPM
1 Temperature Sensor
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10 – 80 C
+/- 5 C
Analytical Component
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Rotational Sensor
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200 – 4200 RPM
13.3 – 280 Hz w/ 4 Bolts
Analytical Component
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Engine RPM Circuit
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1200 – 3600 RPM
20 – 60 Hz
Analytical Component
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Temperature Circuit
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10 – 80 C (1k – 20k ohms)
1 – 4.167V ( 10 – 80 C)
~ .27 C/bit
R1 = 4K Resistor
Vout = Vcc*Rvar/(R1 + Rvar)
Analytical Component
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Software Algorithm
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Data will be saved
to a memory unit
available for the
HC12
Data will be
transmitted to a pc
program where the
data will be
interpreted and
exported to an
excel document
User Interface
Division Of Work
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Kendrick:
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Testing
Everything Else
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Cody:
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Mounting
Fabrication
Testing
Work Completed
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Obtained Sensors
Sensor Analysis
Limited Testing of parts
Circuit Design
Work To Be Completed
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HC12 Software
PC Software
Circuit Implementation
Testing
Installation on Baja car
More Testing
Test Plan
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Test each Sensor for Accuracy
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Temperature Sensor – Temperature
Chamber
Input Shaft Rotational Sensor – Test
Fixture
Engine RPM – On car testing
Displacement Sensors – Test
Measurements
Power Consumption
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Power Consumption
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~300 mW HC12
~3 mW Temperature Sensor
~5 mW Displacement Sensor
~1 mW 555 timer
Total Power Consumption ~310 mW
System Cost
Qty.
Retail
Total
Actual
Displacement
Sensors
4
$395
$1580
$355
Thermal Sensor
1
$15
$15
Donated
Hall Effect
1
$55
$55
Donated
Extra Memory
1
$60
$60
$60
HC12
1
$150
$150
Free
Misc.
-
$50
$50
$50
$1810
$465
Total
Safety Concerns
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Baja Car driving could be dangerous
Nothing Connected to the data
acquisition should be dangerous
Questions
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?