Abstract
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> In orthopedic surgery, measuring the strain in an internal plate over time makes it possible to monitor the bone fracture healing process. Magnetoelastic sensing provides a wireless, highly sensitive, and low-cost technique for measuring strain. An amorphous ribbon is bonded to the implant plate and an emitter/receiver unit is placed outside the patient's body. Bonding the sensor to a plane surface decreases its output signal intensity due to an increase of the magnetic anisotropy. To overcome this problem, we demonstrate a sensor signal detection system, which increases the signal-to-noise ratio. This system is based on a pair of flat miniaturized coils that can be put on the patient's skin. This technology is then applied to measure strain in a plate that supports a fractured generic bone under static loading conditions. The sensor output responses are presented and the high accuracy values obtained are given. </para>
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