NEULOG MOTION LOGGER SENSOR GUIDE
NeuLog motion logger sensor
NUL-213
The NeuLog motion sensor can be used for any science experiment or
activity which requires accurate distance, velocity, or acceleration readings
such as in the fields of Physics, Mechanics, Physiology, Biology, etc.
The sensor comes pre-calibrated so you can start experimentation right out
of the box using this guide.
The motion sensor uses an ultrasonic transducer to both transmit an
ultrasonic wave, and to measure its echo return. Objects in the range of
0.15 to 6 meters can accurately be measured to give distance, velocity, and
acceleration readings using this method.
Hundreds of possible experiments that can be done with the NUL-213
sensors are: gravity experiments, ball drops, momentum, impulse,
conservation of energy, kinetic vs. potential energy, and many more.
The motion sensor can collect data using the following units of measure:
Meters (m): The SI distance unit
Meters/second (m/s): The SI velocity unit which measures the
distance traveled over time.
Meters/second
2
(m/s
2
): The SI acceleration unit which measures the
change in velocity over time.
For best results:
The NUL-213 motion sensor has a working range between 0.15m and 6.0
meters, results may be inconsistent outside of this range. Ultrasonic waves
that are emitted from the sensor and spread out in a cone pattern at about
15° around the point of reference.
If possible, attach the sensor to something stable to avoid movements
which can give skewed readings.
If you get poor readings, another object in the foreground or background
that is within the cone that may be reflecting the ultrasonic waves to add
noise to the experiment.
Use objects which are at least 10cm x 10cm when tracking specific
targets.
For smaller targets we recommend starting the object closer to the
sensor, for larger objects we recommend starting farther away.
When testing in areas with many hard surfaces; the waves may bounce
around and create extra noise for the detector. This can cause irregular
graphs. To reduce the noise level try covering some of the surrounding
surfaces with a soft material to dampen sound such as cloth or foam.
When using the motion sensor to detect an individual’s movements;
trying carrying the sensor instead of pointing the sensor at one self. For
example to measure a student’s velocities have them walk or run with
the sensor while pointing it at the wall.
