Patent ID: 9032777
Filing Date: 2015-05-19
Classification: G01D,G01L,G01P

Abstract:
1. A method for automatically calibrating a capacitive transducer to neutralize feed-through capacitance starting from an initial value for a neutralization capacitance, the method comprising: applying no electrostatic force to a proof mass of the capacitive transducer; recording a base output value of the capacitive transducer while no electrostatic force is applied to the proof mass; applying an electrostatic force F recording a first change in the output value of the capacitive transducer between the base output value and a first output value when the electrostatic force F applying an electrostatic force n*F recording a second change in the output value of the capacitive transducer between the first output value and a second output value when the electrostatic force n*F increasing, decreasing or maintaining the neutralization capacitance based on the recorded first and second changes in the output value of the capacitive transducer; and repeating the method until a final value for the neutralization capacitance is reached.