instrumentation final project
Post on 12-Apr-2017
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Characterizing Angular Position in Parallel to Linear Actuation
Dennis Sohn and Elizabeth Lee
ObjectiveTo characterize motor step position with angular position of the
medical capsule robot
Utilize LabVIEW to acquire data from an accelerometer, which will be attached to the base bellow attachment piece of probe
Utilize LabVIEW to linearly control gear shaft, which will vary actuation levels of the probe
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EquipmentLaptop with LabVIEW installed
National Instruments USB 6221 DAQ Board
ADXL330 3-axis MEMS Accelerometer
Protek 32023L Power Supply
Actuation Motor
Medical Probe
Big Easy Driver: stepper motor driver board
Casing
3.5 V Transistor
Bread Board
Fig. 1 Big Easy Driver
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Experimental SetupMain LabVIEW program with two subVIs
First subVI acquire data from accelerometer
Second subVI controls actuation motor
Gear shaft is attached to syringe to transfer rotational motion from motor to linear translational motion to control air pressure via syringe
Accelerometer is attached at base bellow connection piece and acquire data at various actuation processes
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Design
Fig. 2 (a)Medical capsule (above) and (b)setup (right) 5
Design Diagram
Fig. 3 Design setup of medical capsule
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Video of design setup
VR View of Medical Capsule Setuphttps://photosynth.net/preview/view/9953a19e-5735-4058-9885-b438dbc70043?startat=0
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LabVIEW Block Diagram of Main VI
Fig. 4 Block diagram of main VI 8
LabVIEW Front Panel of Main VI
Fig. 5 Front Panel of Main VI 9
LabVIEW Block Diagram of Motor Stepper
Fig. 6 Block Diagram of Motor Stepper 10
LabVIEW Front Panel of Motor Stepper
Fig. 7 Front Panel of Motor Stepper 11
LabVIEW Block Diagram of Accelerometer
Fig. 8 Block Diagram of Accelerometer 12
LabVIEW Front Panel of Accelerometer
Fig. 9 Front Panel of Accelerometer
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Equations for Finding AnglesTilt Angle (Eq. 1):
Panoramic Angle (Eq. 2):
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Graph: Tilt Angle by Motor 1
Fig. 10 Tilt angle of Motor 1, https://youtu.be/grpivihrwbU
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Graph: Tilt Angle by Motor 2
Fig. 11 Tilt angle of Motor 2
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Graph: Tilt Angle by Motor 3
Fig. 12 Tilt angle of Motor 3
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Graph: 360 Degrees Rotation of Capsule
Fig. 13 Full rotation of capsule
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Videos of 360 deg. rotation
19Bottom-view and side-view of medical capsule
ConclusionsStated Objective: to characterize motor step position with angular
position of the medical capsule robotSuccessfully obtained tilt and panoramic angles and control medical capsule in all
positions
Challenges Faced:Calibration of syringes
Inconsistent power supply led to constant calibration of accelerometer
Future Development:To avoid algorithms, input joystick/hand-held controller
Platform to add universal instruments (ie, camera, biopsy mechanisms)
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Summary and Real Life Application:
Potential universal medical applications
Low cost alternative
Reach and screen patients in low socioeconomic population
Detect early signs of illnesses
SAVE LIVES AND DO GOOD!!!
Closing Thoughts
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Who Wants To Try It Out?
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