Project Files
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Sports Medicine Testing and Rehabilitation Systems
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Computer Sports Medicine takes used Cybex Humac, Norm and
Biodex Active Testing and Rehabilitation Systems and
retrofits them with new electronics and new software. These
systems present preprogrammed and custom isokinetic and
isometric resistance profiles to patients and provide
real-time quantitative data to rehabilitation professionals.
The equipment is large, heavy and expensive. Upgrading
existing systems saves rehab centers significantly over
buying new systems, and provides many new operational and
database features. |
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| Bolton
Engineering designed the original retrofit electronics
to work with Humac and Norm machines, and, several years
later, designed add-on boards to allow the same
electronics to operate with Biodex II and Biodex III
systems. The original system boards were built in the
late 1980’s and early 1990’s using discrete TTL and PAL
logic. Each system had as many as 5 boards with a system
total of more than 300 IC’s. Bolton Engineering studied
the original documentation and reversed engineered the
critical design sections. Most of the logic was placed
in a medium-size FPGA (Field Programmable Logic Array).
The final system fit on a single 6” x 10” circuit board
with fewer than 50 ICs.
The retrofit electronics communicates via USB to a
host PC running Windows. The system has two redundant
processors that continuously check and cross-check
each other. Redundant hardware interfaces are
implemented to monitor critical encoder channels.
Hardware safeties are designed to halt the system and
disable the motor servo amplifier under power supply and
processor fault conditions.
For additional information, see
www.csmisolutions.com.
Project Scope
Bolton Engineering wrote the specification, designed the
schematics and circuit board, developed a flexible FPGA-based
I/O system, fabricated and debugged the hardware, and
implemented the on-board control USB software and DSP
software. Bolton Engineering also developed Windows
driver software and created communication channel debug
and demonstration software.
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Consumer and Computer
