Drop Impact Of A Typical
Portable Electronic Device
Author(s)
C. Y. Zhou, T. X. Yu & R. S. W. Lee
Abstract
Drop impact reliability is an important concern for the design and use of portable
electronic products. When the product is accidentally dropped on the ground,
impact forces are transmitted from the product case to the printed circuit board
(PCB) and other components within the case. These forces may cause severe
functional damage in the form of component failure and/or interconnection
breakage. This paper reports our investigation on the dynamic behaviours of a
typical portable electronic device under drop impact loading. Firstly, an idealized
system which contains an outer case and a PCB attached with a package was
adopted as specimen. With an innovative design, the actual impact force pulses
were measured by employing a Hopkinson bar in the dynamic test rig. Dynamic
strains of the PCB were simultaneously recorded to explore the correlation
between the strains and the impact pulse. Particular attention has been paid to the
dependence of the shock response of the PCB on the impact velocity, impact
force pulse, as well as the impact orientation. Analysis is carried out to explain
the experimental results. A deep understanding of the shock response of typical
electronic product systems will help to guide the design of rugged and highly
impact-resistant devices
Keywords: portable electronic products, drop test, impact.
1 Introduction
Benefit from the advancements of new technologies, electronic components have
become smaller, thinner and lighter. Today, portable electronics, such as cellular
phones, PDAs (personal digital assistants), digital cameras etc., have a
Keywords
portable electronic products, drop test, impact.
Related Book
Other papers in this volume
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