The application discloses a four-quadrant tracking and positioning sensor based on
eddy current differential nonlinear effect, which comprises an upper and lower
parallel detection coil array plate and a target conductor. The application passes the same
excitation signal into four plane coils on the detection
coil array plate, converts the two-dimensional micro displacement of the detection
coil array plate relative to the target conductor array plate into the
voltage signals of the four plane coils by using an
inductance measurement circuit, processes the four
voltage signals by using a
microprocessor system, obtains the differential
signal related to the displacement, and takes the differential
signal as the input
signal of an executing mechanism. Due to the sensitivity characteristics of high center and low edge, the application can be specialized in the
negative feedback regulation of a plane displacement mechanism, and can also adapt to harsh environments such as oil stains and dust. The application has the advantages of simple structure and good reliability, and is suitable for the
negative feedback position regulation scenes of detecting the plane two-dimensional displacement, such as a fast steering mirror, a
laser stabilizer, a solar panel attitude calibration and the like.