Smart material is the focusing point of the future of material sciences, the foundation of technology and engineering of next century. The rare earth giant magnetostrictive material is one of the smart materials, the external pressure exerted induces a magnetic field, which can be picked up by surrounding coils to incert into electric signals. Or it can change its shape under the influence of the magnetic field that is generated by the electric signals in the surrounding coils. In other words, the smart material can produce a sensor-actuator intelligent system.

    Compared with other sensor devices, the giant magnetostrictive system is obviously advantagous, and most important of all, it's smart. Firstly, it's piezomagnetic with a maximum compressive stress of more than 700MPa, that is to say, it can be applied to withstand heavy load. Secondly, because of the superior performance of the smart material, it can produce large motion, high power output, high rate of energy transformation, short responses time under the influence of magnetic field, the sensor actuator intelligent system responses rapidly and exactly. Moreover, the simplified one-body entity (sensing-actuating) plays an important role in the development of modern industry, Undoubtedly, along with the development of automation, the giant magnetostrictive sensor-actuator intelligent system will be applied to as many fields as imaginable in the near future.

    Market Analysis
    Pressure sensor has already occupied large part of the market ,but the intelligent giant magnetostrictive sensor and sensor-actuator intelligent system is not only adapt to the traditional market, but also will bring out new markets. Up to now, there are already some products are of the smart material in the market, for example, the active noise control and vibration damping system, hyperstatic platform, self-adapting resistance reduction system of plane, etc. It's estimated that the plane market only will be cover гд10 billion annually all over the world, in other words, the profit is significantly high.