Biomedical Engineering Reference
In-Depth Information
Figure 5.12
Foot pressure measurement system introduced by Tekscan, Inc. It is a
shoe insole insert with an array of pressure sensors that vary their resistance with
applied pressure. See the text for detailed operation of sensor and computer display
system. (Reproduced with permission of Tekscan, Inc.)
points in various foot deformities and in diabetic feet (Pitie et al., 1999). The
results of surgery and shoe orthotics to relieve the pressure points are also
immediately available.
5.2.4 Synchronization of Force Plate and Kinematic Data
Because kinematic data are coming from a completely separate system, there
may be problems in time synchronization with the ground reaction data.
Most optoelectric systems have synchronizing pulses that must be recorded
simultaneously with the force records. Similarly, TV systems must generate
a pulse for each TV field that can be used to synchronize with the force
signals. The major imaging system that has problems is cine. Here, the movie
cameras must have a sync pulse generated every frame, and somehow the
number of the pulse must be made available to the person doing the film
digitization.
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