System and method for detecting physical change without physical contact

摘要

A system and method for detecting and analyzing changes in the body are provided.The system includes an electric field generator, an external sensor device, an orthogonal demodulator, and a controller.The field generator is configured to generate an electric field associated with the body.The external sensor device is configured to transmit information to an electric field generator to detect physical changes in the body in an electric field causing frequency changes in the electric field.The quadrature demodulator is configured to receive an electric field from the field generator, detect the frequency change of the electric field, and generate a detection response.The controller coupled to the field generator is configured to output a frequency control signal to the field generator and to modify the frequency of the electric field by adjusting the frequency control signal.Diagram