Interacoustics Nydiag 200, Руководство по эксплуатации, Страница: 28 / 35

Rotary Chair Nydiag 200 Page 21

Overview:

Comments:
1.
A velocity of 90°/s means that the chair will do 1/4 or 0,25 full rotations per second
–
or take 4
seconds to do a full 360° cycle.
2. An acceleration value of 10°/s² indicates an acceleration time of 9 seconds before the set
velocity of 90°/s is reached

Testing the Set Velocity Function:

Velocity °/s
–
constant velocity

Acceleration °/s²
–
linear increase in velocity up to constant velocity
1.
A stopwatch is used to measure the velocity. Enter the value „90‟ in the
Velocity v: box
and press “Start”. Allow the chair to accelerate to the set velocity and with the stopwatch,
measure how long it takes for the chair to make a 360° cycle. At a constant speed of 90°/s
it will take 4 seconds to do a full 360° cycle.
2. Check that acceleration is fast with high values and moderate with low values
Maximum acceleration is 100°/S² and must never exceed this value.
6.4 Sinusoidal test function (smooth pursuit, SHAT)

In the
Sinusoidal
mode the system performs the movement which is used in the Smooth Pursuit
test and in the SHAT test. The Smooth Pursuit test requires sinusoidal or triangular movements at
a pre-defined frequency and amplitude.

Purpose of
Sinusoidal
: The chair will rotate in pendular movements to the left and to the right or
vice versa. Either with constant amplitude or with diminishing amplitude.

Stimulus: Acceleration up to peak velocity, followed by deceleration of similar proportions.

Relevant VNG test protocol: Data from
Sinusoidal
can be recorded and analyzed in the
SinusPendular test

VNG Toolbar icon:
