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Fig. 13.3 Mechanical

accelerometer

b.

Solid-State Accelerometers are intended to positioning of robot or platform.

It is a self-contained system, small in size and low cost. These are divided into

several sub-groups, and they are vibratory, silicon, surface vocal wave and quartz

devices. Surface Acoustic Wave (SAW) accelerometer is one of the examples

of solid state accelerometers. It consists of resonators on a cantilever beam,

resonates at a specific frequency as shown in Fig. 13.4. The beam at one end

is attached with mass, it moves freely, and other end is stiffly attached to the

case. The beam bends, when the force is applied to the mass. The frequency of

resonators changes accordingly which is proportional to the acceleration.

Fig. 13.4 Solid-state accelerometer