Han Zhao

Title: Han Zhao: Innovator in Acoustic Measurement Technologies

Introduction

Han Zhao is a prominent inventor based in Hangzhou, China. He has made significant contributions to the field of underwater acoustic measurement, holding a total of 2 patents. His work focuses on developing advanced calibration devices and methods that enhance the accuracy of hydrophone sensitivity measurements.

Latest Patents

Han Zhao's latest patents include a "Transducer transfer impedance calibration device based on spatial frequency domain smoothing technology." This innovative device comprises a signal transmitter, a power amplifier, a transducer pair, a measurement amplifier, a signal collector, a measurement processor, and a current sampler. It extracts acoustic channel information through sound field spatial information or measurement methods to design a spatial domain smoothing filter. The device processes the transmitted current signal and the received signal using spatial frequency domain smoothing technology to obtain the transfer impedance of the transducer pair.

Another notable patent is the "Method of free-field broadband calibration of hydrophone sensitivity based on pink noise." This method is crucial for free-field underwater acoustic measurement and is primarily used for broadband measurements of hydrophone sensitivity. The method involves transmitting a broadband pink noise signal and performing synchronous processing and FFT on the transmitted current signal and the received voltage signal. By analyzing the direct wave and the reflected wave in the water tank, the transfer function is averaged to eliminate the influence of reverberation, resulting in an accurate broadband transfer function.

Career Highlights

Han Zhao has worked at Zhejiang University, where he has contributed to various research projects and innovations in acoustic measurement technologies. His expertise in this field has positioned him as a key figure in advancing underwater acoustic measurement techniques.

Collaborations

Throughout his career, Han Zhao has collaborated with notable colleagues, including Yi Chen and Liuqing Yang. These collaborations have further enriched his research and development efforts in the field of acoustic measurement.

Conclusion

Han Zhao's innovative work in acoustic measurement technologies has led to significant advancements in the field. His patents reflect his commitment to improving the accuracy and efficiency of hydrophone sensitivity measurements. His contributions continue to influence the industry and inspire future innovations.