Title :
Time frequency analysis of dynamic syringe friction - the benefits of an O-ring plunger seal design
Author_Institution :
Product Innovation Adv. Dev., Medrad Inc., Indianola, PA, USA
Abstract :
Syringe friction is of interest to control and system engineers designing automated pharmaceutical injection systems. The dynamic friction properties of a 4 lobe, O-ring plunger seal syringe design are examined with the Short Time Fourier Transform (STFT). The results are contrasted to the friction properties of a syringe design with a rubber cover plunger seal. Analysis indicates the magnitude of O-ring seal plunger friction is less than the rubber cover design´s. Furthermore, the stick-slip effect of the O-ring design is much less than the rubber cover design. It is shown that the STFT is a useful analysis technique for studying tribological properties of a medical device.
Keywords :
Fourier transforms; drug delivery systems; friction; rubber; time-frequency analysis; O-ring plunger seal design; automated pharmaceutical injection systems; dynamic syringe friction; medical device; rubber cover design; rubber cover plunger seal; stick-slip effect; tribological properties; Automatic control; Control systems; Design engineering; Friction; Pharmaceuticals; Rubber; Seals; Structural rings; Systems engineering and theory; Time frequency analysis;
Conference_Titel :
Bioengineering Conference, 2003 IEEE 29th Annual, Proceedings of
Print_ISBN :
0-7803-7767-2
DOI :
10.1109/NEBC.2003.1216118
