The Body Guardian

In this unit, students will investigate the effects of an impact force on the human body system, and design a method of protection from harmful contact. Students will apply knowledge of  human tissues and genetic disorders, impact forces and materials analysis to design a protective gear system that can withstand the effects of  multiple impact forces and serve to protect the underlying tissues.  Following an investigation of hemophilia and sex-linked traits, students will design and analyze their gear using an Arduino interface, accelerometers and a pendulum force apparatus.  Students will use a ballistics gelatin to simulate the presence of human flesh, as it will serve as the target of an applied force (by the pendulum). Data will be analyzed using linear regression lines and comparisons will be made regarding the effectiveness of the protective gear.  Students will collect and measure the acceleration of the ballistics gel and relate it to the initial force of impact on the guard.  Following analysis and redesign, student teams will compose a proposal to the Hemophilia Foundation containing information that might sway the Foundation to invest in their design for use with patients.

Engineering Design Challenge:  Student teams will be presented with the scenario that the National Hemophilia Foundation is soliciting proposals for a protective gear system for patients with hemophilia to use during daily routine and exercise activity.  Student design teams are asked to develop a system that will protect human tissue from harmful contusions that can be serious for a patient with hemophilia.

Below are links to the ZIP files needed for the Arduino Environment code as well as teh C++ libraries.




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