P14546: Virtual Reality Data Glove
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Build, Test, Document

Table of Contents

This page contains information pertaining to the construction and testing of group P14546's project. Information regarding project construction, test plans, and test results are shown below.

Project Construction

Final Design
Full Glove Assembly

Full Glove Assembly

Full Assembly

Full Assembly

Glove

Glove

PCB and Mircocontroller

PCB and Mircocontroller

CAD Drawings

Full CAD Assembly

Full CAD Assembly

Armband Assembly

Armband Assembly

Hand Assembly

Hand Assembly

Finger Assembly

Finger Assembly

Project Budget and Bill of Materials

Project Budget as of MSD I

Project Budget as of MSD I

MSD II end result Bill of materials with cost estimate

MSD II end result Bill of materials with cost estimate

End Cost to Fabricate Glove

End Cost to Fabricate Glove

Test Plans and Problem Tracking

Our current test plan can be viewed here

Our problem tracking can be viewed here

Test Results

Testing 1:
The team performed a test to evaluate the effectiveness of the flexpoint sensors. This involved bending the sensors around a fixed radius to get a smooth curve. This was done to mimic a finger bend and to find a consistent trend with the voltage data.
Testing 2:
The next step was to try the flex sensors with the sensor on the hand to see if it simulated the results from the fixed radius.
Testing 3:
Two types of flex sensors were used for testing, spectra symbol and flexpoint. This was done to prove which sensor produced the best results. The results are shown below. It was found that Flexpoint produced a more consistent voltage readout than spectra symbol.
Fixed Radius

Fixed Radius

Testing Setup

Testing Setup

Glove Testing

Glove Testing

Testing Issues

Testing Issues

All sensors results

All sensors results

All Sensor Results

All Sensor Results

Testing Results

Testing Results

10-7-14 Testing of Overlapping Sensors

Sensors overlap, which may cause errors in the data. This testing was used to evaluate the problem, and to help us figure out if we needed to redesign the knuckle assemblies. To obtain a baseline, 1 sensor was used as intended, with only 2 knuckle pieces in place. The voltage was measured as the finger bent. The 4 knuckle pieces were then attached to 1 finger. The sensors were slid through 3 knuckle pieces each, and the voltage was measured as the finger bent.

Testing Results

Testing Results

Sensor Connection

Sensor Connection

OP-AMP Circuit

OP-AMP Circuit

Testing Configuration

Testing Configuration

Top Testing Configuration

Top Testing Configuration

Top Glove Sensor Mount

Top Glove Sensor Mount

Results: Sensors are not affected by the overlap. We have decided to redesign the middle knuckle pieces to allow for a smoother bend and simpler design.

11-5-14: Grasp Testing

Several objects were grasped to test accuracy and repeatability of design. The objects used included PVC piping of various diameters (3.5, 4.75, 6, and 8.75 cm) and various different balls (whiffle ball, baseball, racquet ball, and ping pong ball). For the test, the hand was placed flat on the desk for 2 seconds, grasped the object and held for 2 seconds, and then released and the hand was placed flat on the table. This was repeated 5 times for each object.

Electrical Circuit

Electrical Circuit

Test Setup

Test Setup

Test Setup

Test Setup

Sample Data

Sample Data

12-8-14 Testing: Repeatability Testing

Similar to the testing conducted on 11-5-14, the same objects were grabbed and released for 2 seconds. After all the raw data was recorded, it was input to excel in order to analyze fully. Before beginning the testing, a brief calibration routine run in order to correlate the volatages to specific angles.The results from the testing are shown here

Objects Grasped

Objects Grasped

Calibration Curves

Calibration Curves

Calibration Equations

Calibration Equations

Curve for Pinky Second Knuckle

Curve for Pinky Second Knuckle

Maximum Angle of Bend

Maximum Angle of Bend

PCB Layout and Circuitry

PCB layout
Flexpoint Interface PCB Board

Flexpoint Interface PCB Board

Flexpoint Interface PCB Board

Flexpoint Interface PCB Board

Breakaway PCB Board

Breakaway PCB Board

Breakaway PCB Board

Breakaway PCB Board

Circuit layout

Voltage Design #1

Voltage Design #1

The resistance of each sensor, along with the optimal resistance and voltage range for the PCB board are located here


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