Model No. PS-2138
Sensor Setup
5
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Knee
Place the large strap around the thigh just above the knee. Place
a small strap around the upper part of the calf (combine both
small straps end-to-end if necessary).
Bend the knee at a right angle. Align the probe’s hinge with the
knee. Attach one arm of the probe to the thigh parallel to the
femur.
Extend the knee and attach the other probe arm parallel to the
tibia.
Flex and extend the knee to check for proper alignment. Have
the subject stand on both feet and make sure that the probe does
not shift significantly.
Hip
Place the large strap around the waist. Combine both small
straps end-to-end (if necessary) and place them around the
upper thigh.
Have the subject stand and place his or her foot on a chair so
that the thigh is horizontal. Align the probe’s hinge with the
hip joint. Attach one arm of the probe to the thigh parallel to
the tibia.
Have the subject stand on both feet; attach the other probe arm
vertically to the waist strap.
Move the hip joint through its full range of forward and
backward rotation to check for proper alignment.
Sensor Setup
Connect one or two Goniometer Probes to the Angle Sensor. Connect the
Angle Sensor to a PASPORT interface. The interface will collect data for
angle, angular velocity, and angular acceleration from each probe. You can
select units of degrees or radians in the software.
The default sampling rate of the sensor is 20 Hz. In most cases this is
sufficient, but for faster movements you may wish to increase the rate to 50
or 100 Hz.
Optional Data Smoothing
The sensor calculates the angular velocity and angular acceleration from
the measured angle data. The angular velocity is the change in angle
between consecutive samples divided by the time between samples.
