Output Range: 0V to 5V
Calibration: Required every use
Default scaling Value: Range 0.5-2.5m: 2mV/mm
Range 0.5-5m: 1 mV/mm
Update Rate (for Range 0.5-2.5m): 25 msec
Sensitivity (for Range 0.5-2.5m): 2mV/mm
Update Rate (for Range 0.5-5m): 100 msec
Sensitivity (for Range 0.5-5m): 1mV/mm
1. Install the IX-ELVIS board into the National Instrument ELVIS platform or the
IX-myDAQ board onto the NI myDAQ. If using ELVIS, connect the ELVIS power supply
to the ELVIS unit and connect it to the computer via a USB cable. Ensure both of
the power switches are in the â€œonâ€ position. For the myDAQ, connect it to
the computer using the USB cable.
2. Connect the MINI DIN7 connector of the MDN-100 to either CH1 or CH2 of either
the IX-ELVIS or IX-myDAQ board.
3. Open the recording software; select the channel that the MDN-100 is plugged
into and ensure the range is set to 0V to 5V.
4. Set the sensor 0.5m away from a flat wall press Set for SP2. Set the sensor
2.5m away from a flat wall press Set for SP1.
5. If the range is changed the unit will need to be re-calibrated.
1. Follow the calibration procedure above.
2. Set up the experiment and press record.
*Note: The signal may be inverted when using the myDAQ setup.
Students can study a variety of motions with the Motion Detector including:
- Walking toward and away from the Motion Detector
- Dynamics carts moving on track
- Objects in simple harmonic motion, such as a mass hanging on a spring
- Pendulum motions
- Objects dropped or tossed upward
- A bouncing object
The MDN-100 emits short bursts of ultrasonic sound waves from the ultrasonic
transducer. These waves fill a cone-shaped area about 15Â° to 20Â° off the axis
of the center line of the beam. The MDN-100 then â€œlistensâ€ for the echo of
these ultrasonic waves returning to it. The MDN-100 measures how long it takes
for the ultrasonic waves to make the trip from the MDN-100 to an object and
back. Using this time and the speed of sound in air, the distance to the nearest
object is determined.
Note that the MDN-100 will report the distance to the closest object that
produces a sufficiently strong echo. The MDN-100 can pick up objects such as
chairs and tables in the cone of ultrasound. The sensitivity of the echo
detection circuitry automatically increases, in steps, every few milliseconds as
the ultrasounds travels out and back. This is to allow for echoes being weaker
from distant objects.