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    Motion Sensor

    $208.81
    The MDN-100 is a dual range ultrasonic distance sensor. The MDN-100 can be used to collect position, velocity, and acceleration data of moving objects. It has a standard camera mount so that a tripod can be used to position the sensor accurately.
    MFR Part #: MDN-100

    Specifications:

    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



    Calibration Instructions:
    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 “on” 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.

     

    Measurement Instructions:
    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 15° to 20° off the axis of the center line of the beam. The MDN-100 then “listens” 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.

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    Specifications:

    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



    Calibration Instructions:
    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 “on” 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.

     

    Measurement Instructions:
    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 15° to 20° off the axis of the center line of the beam. The MDN-100 then “listens” 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.