Name:Chris Arndt (Red Cohort?)
I think that the signal strength of the cliff sensors will vary with color such that the lighter colors will have a higher reading than darker ones. This is because the lighter the color, the closer it is to white, which is the color that reflects the most light. However, no matter what color, they will all be high enough to trigger the cliff sensor so that the robot knows there is something under it.
Purpose/Description of Experiment:
1. I will start the Create and enter the command "128 131 142 29" into the Realterm "Send" box. This command will give me a reading of the signal strength of the left cliff sensor.
2. I will then read the signal strength 3 times for each color and take the average of the three in order to ensure accuracy.
3. After taking these measurements, I will enter the command "128 131 142 9" into the Realterm "Send" box. This command will give me an on/off reading as to whether or not there is something under the robot or not (0 meaning there is ground under it, 1 meaning there is no ground).
| Color of Paper
| Cliff or No Cliff
| Signal Strength (Crazy Numbers/Decimal)
|
| Black
| Cliff
| 5 72/1352
|
| Red
| Cliff
| 5 240/1520
|
| Orange
| Cliff
| 7 0/1792
|
| White
| Cliff
| 7 12/1804
|
| Yellow
| Cliff
| 7 58/1850
|
| Green
| Cliff
| 7 148/1940
|
| Blue
| Cliff
| 7 164/1956
|
Results/Conclusions:
The robot read higher signal strenghths not for lighter colors, but for higher energy colors (violet being high-energy, red being low-energy). With the exception of white, the colors followed the pattern of the visible light spectrum (ROYGB). The higher-energy colors with shorter wave-lengths resulted in stronger signals. The lower-energy colors resulted in weaker signals.
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