Biaxial capacitance strain transducer - has pair of transducers each with driven capacitance plates and sensing capacitance plate

摘要

The biaxial capacitance strain transducer is in the form of a laminated structure defining two capacitance strain transducers in orthogonal orientation. Each capacitance strain transducer comprises driven capacitance plates which are excited by an oscillator and a sensing capacitance plate in spaced parallel relation to the driven capacitance plates. A shutter mechanism in the form of a pair of apertured plates is provided between the driven plates and the sensing plates. The ends of the apertured plates extend out of the laminated structure and are attached to the surface where strain is to be measured.