1. BioProc2/3 Analog data processing Part Three
Impact, Work and Force Analysis Techniques

2. Gait & Biomechanics Laboratory, University of Ottawa
Introduction
Download bpwin2.zip or bpwin2.exe from CSB website
go to Software and then to BioProc2
installs all necessary device drivers
only needs to be done once
to get latest version use the Update from Internet item in the Help menu
Gait & Biomechanics Laboratory, University of Ottawa

3. Force transducer calibration
use Pearson Correlation from Correlation menu
(new) after correlation and regression coefficients are computed you are prompted to apply one of the regression equations to the original data
use Scaling menu from Analysis menu to scale data to any units
Gait & Biomechanics Laboratory, University of Ottawa

4. Force platform analyses
use submenu Analyze Force Plate Data from Analysis menu
two plates can be combined (Combine Two Plates)
impulse computed (from integration statistics)
changes in centres of gravity estimated (Centre of Gravity)
Gait & Biomechanics Laboratory, University of Ottawa

5. Centre of mass calculations
requires subject to have static initial conditions
can compute takeoff velocity, height after takeoff, lowest and highest positions during period of stance for all three directions, work done and jumping power
(new) high-pass filtering reduces drift
Gait & Biomechanics Laboratory, University of Ottawa

6. Gait & Biomechanics Laboratory, University of Ottawa
Angular Impulse
use Work or Angular Impulse Analysis from Integration Statics submenu of Analysis menu
requires data file that contains moments (from Vicon or Visual3D ASCII export)
moments must be in the first half of the data file, second half may contain powers
Gait & Biomechanics Laboratory, University of Ottawa

7. External, Internal and Total Work
use Work or Angular Impulse Analysis from Integration Statics submenu of Analysis menu
requires data file that contains moment powers (from Vicon or Visual3D ASCII export)
powers must be in first half or all of the data file
average work, sum of positive and negative work and external, internal and total mechanical work done are computed for each axis
sums for each axis and total for all axes are also computed
calculates percent contributions for each moment
Gait & Biomechanics Laboratory, University of Ottawa

8. Moment Power Analysis (Work Bursts)
use Moment Power Analysis from Integration Statics submenu of Analysis menu
requires data file that contains moment powers (from Vicon or Visual3D ASCII export)
computes work bursts and peak moments and powers whenever power changes from positive to negative or moment changes from positive to negative
set a threshold to eliminate small bursts of power
Gait & Biomechanics Laboratory, University of Ottawa

9. Impact (GSI and HIC) Analyses
use GSI and HIC (Impacts) from Integration Statics submenu of Analysis menu
needs one channel of acceleration data scaled to g’s or m/s2
second channel may contain triggering information (no longer used)
computes Gadd Severity Index for head impacts only (i.e., uses a2.5)
(new) average acceleration, A-3 and HIC, integral, delta g and time to peak acceleration
HIC is only done for the maximum allowable time interval
Gait & Biomechanics Laboratory, University of Ottawa