| 摘要 |
A differential transformer is used as a feedback sensor for generating an error signal sensed at the face of an element of a sonar transducing array. This error signal is used to correct the excitation signal to the transducer to correct both phase and amplitude errors in the vibration of the radiating surface of the transducer. In this way, the transmitting beam pattern for the sonar array is improved. The differential transformer is capable of sensing the mechanical motion of the transducer radiating surface without being affected by a strong electric or magnetic field. By using a separate differential transformer sensor and processing circuit for each transducer in the array, electrical cross-talk between the individual elements of the array is eliminated.
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