Accelerometer servo-controlled single-axis

Figure 4-220 shows the schematic diagram of a servo-controlled single-axis accelerometer. The pendulum is a disk kept in position as in the case of the reverse pendulum. Extremely efficient accelerometers can be built according to this principle in a very limited space. The Sunstrand accelerometer is seen in Figure 4-221. 

Figure 4-220. Schematic diagram of a servo-controlled single-axis accelerometer.

Figure 4-221. Servo-controlled single-axis Sunstrand accelerometer (a) accelerometer photograph (b) exploded view of the accelerometer. (Courtesy Sunstrand [102].)...

If the acceleration is variable, as in sinusoidal movement, piezoelectric systems are ideal. In case of a constant acceleration, and hence a force that is also constant, strain gages may be employed. For petroleum applications in boreholes, however, it is better to use servo-controlled accelerometers. Reverse pendular accelerometers and single-axis accelerometers are available. 

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See also in sourсe #XX -- [ , ]

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