There are certain trigonometric function relations between the needed signals and the output signals,which are measured by the unit of the high accuracy gyroscope and the three-axis accelerometers,so as to survey the attitude parameters of downhole.

The exceeding water gesture analysis was made by the trained NN when single factor changed.

An airflow level posture sensor for restraining acceleration interference is described.

The structure and signal processing that make use of the natural convection gas in a hermetic chamber pendulum characteristic to sense level posture were researched.

Research of Switch-Type Omnibearing Horizontal Attitude Sensor;

With the method of FEA (finite element analysis), the distributions of temperature field and flow field in sense organ at different arrangements of hot-resistances and different tilting states, were obtained by building the three-dimensional model of micromachined airflow omnibearing level posture sensor\'s sense organ.