Logger Pro Video Analysis: Integrating Technology into Science and Math Curricula

Monday, January 4, 2016

Kathy Goepfert: Physics Teacher ORHSkjgoepfert@ortn.edu

What is Video Analysis?

• By plotting dots to mark position on each frame of a video, we can measure the displacement, velocity, and acceleration of any object captured by video using graphical analysis tools.

• The standard frame rate for video is 30 frames per second. That means that 1/30 s, or 0.033 s elapse between frames.

Computer Log On

• User Name: hslc221lab

• Password: leave blank

Step 1: Open Logger Pro

• There will be a folder on the desktop titled “Science.” Open this folder to find the icon for Logger Pro 3.6.0

OR• You can always open it from the Start button.

Look for “Vernier Software”

Step 2: Copy the videos to the desktop

• Open File Explorer, then select network location N drive, then select Myschool folder, and then finally the KJGoepfert folder.

• In the January 4th inservice folder you will find a dunebuggy video. Copy and paste the video onto the desktop

Step 3: Insert the movie into LoggerPro

• Go back to the LoggerPro software and find the “Insert” menu.

• Click to view selections.

• Choose “Movie” and select the video clip from the desktop.

Step 3: Insert the movie into LoggerPro

Step 4: Enable Data Analysis

• Click on the button in the bottom right corner with the three balls and the triangle. If you hover over it, it will say “Enable/Disable Analysis.”

• When you click, a panel of buttons will pop up along the right side of the video.

Begin dataBegin dataanalysisanalysis

Step 5: Set the scale

• Click on the left side of the meter stick and drag to the right side of stick. Set this distance as 1 meter.

Set Scale

Step 6: Set the Origin

• This is the point you want to follow throughout the analysis.

• I am choosing the front tire of the dune buggy and clicking on it.

Set Origin

Step 7: Begin plotting points

• Click on the same spot you placed your origin for each frame.

• You need to collect 30 points. (That’s 1 second of footage)

Add Point

Step 8: Analyze data on graph

• Click on curve fit and select the Video Analysis X (we are looking at the change in horizontal velocity) (red dots)

Curve Fit

Step 9: Fit the Data

• Select the correct general equation for your data (either linear, quadratic, or inverse).

• Click “try fit” and see if the trend line goes with your data, then click “ok”.

Step 10: Interpret the Results

• This gives you the slope, y-intercept, and equation for your line.

• If you choose the correct trend line, your RMSE should be much less than 1 and your correlation should be very close to 1.

Logger Pro for your school

• The cost of a site license for Logger Pro 3 is $249.

• You may also have students download the Logger Pro 3 demo from the Vernier website. This demo is good for 30 days.

INDEPENDENT PRACTICE: ACCELERATED MOTION VIDEO ANALYSIS

Video Analysis

• Perform video analysis on 2 other videos:– Balldrop– Balloon1

• Repeat steps from dunebuggy with these two new videos, but this time we are looking at the vertical change in velocity.