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 ConstructionFinal Design
Project Budget and Bill of Materials
Test Plans and Problem TrackingOur current test plan can be viewed here
Our problem tracking can be viewed here
Test ResultsTesting 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.
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.
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.
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.
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.
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
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
specific angles.The results from the testing are
PCB Layout and CircuitryPCB layout
The resistance of each sensor, along with the optimal resistance and voltage range for the PCB board are located here