从事新型传感器与视觉检测方法研究，研究兴趣涉及机器人、数控机床、汽车电子、轨道交通、机场安全、生物医疗等领域。先后主持国家级、省部级和企业联合项目40余项，获得部级科技进步二等奖2项，三等奖4项，发表学术论文150余篇（其中SCI收录30余篇），申请国家发明专利40余项（其中授权18项）。

一直从事新型传感器与光电测试领域的研究工作，取得了一系列国际领先的科研成果，得到国内外同行的认可。
（1）首创全新原理的“涡流栅”传感器：
在国际上首次提出基于横向电涡流效应的“涡流栅”绝对位移传感器新原理，突破了传统电涡流传感器的测量范围瓶颈问题，实现了超大量程范围绝对位移测量。基于这种新型传感器，研制成功国内第一款IP67防水型数显卡尺，这也是世界上第四种防水卡尺，年产值过亿，为民族品牌挣得一席之地，并助推合作企业桂林光路数测股份有限公司成功上市（这也成为我国数显量具领域唯一一家上市企业）。
（2）基于激光和视觉的高铁扣件高速探测方法与系统：
采用独特的“激光+视觉”方法，成功实现了400km/h高铁扣件的在轨探测，领先于国际上最高150km/h的记录。在863计划支持下，研制成功的高铁扣件探测系统已经应用于我国第一列高铁检测车上，顺利通过京沪高铁徐州段、京哈高铁长春段、京大高铁大连段的运行试验，满足了400km/h的高铁运行安全需求。目前该技术指标仍未世界第一。
（3）基于非线性光学矫正的高精度一体化激光位移传感器：
在国际上首次提出非线性光学矫正方法，成功应用于激光位移传感器。在上海市经信委的支持下研制成功一体化激光位移传感器，成为国内唯一一个具有自主知识产权的激光位移传感器。通过产学研合作开发，不久将批量生产面世，与国外品牌抗衡。

1. Suzhi Xiao, Wei Tao, Hui Zhao*. An improved phase to absolute depth transformation method and depth-of-field extension. Optik. Volume 127, Issue 2, Pages 511-516
2. Yubing Bi, Wei Tao, Yanli Hu, Yimei Mao, Hui Zhao*. Luminescent sensing of dissolved oxygen based on Ru(II) complex embedded in sol-gel matrix. Proc. SPIE. 9795,97952
3. Wei Tao, Kai Jiang, Hui Zhao*.Real time Measurement for Deformation of Large Expansion Frame Based on Retro-reflective Technique and Vision Method. Proc. SPIE. 9446,944650.
4. Suzhi Xiao, Wei Tao, Hao Yan, Hui Zhao*.A new geometrical model and mathematical method for three-dimensional surface reconstruction based on phase-shifting structured light technique. Proceedings of SPIE, 2014, ninth Asia-Pacific Remote Sensing Symposium.
5. Hu Yanli, Tao Wei, Bi Yubing, Zhao Hui*. A New Method of Real-time Detection of pH based on Polyaniline-coated Tapered Optical Fiber. INTERNATIONAL CONFERENCE ON OPTICS IN PRECISION ENGINEERING AND NANOTECHNOLOGY (ICOPEN2013), Proceedings of SPIE, Singapore, (WOS:000323566900096)
6. Zhou, Qian; Zhao, Siwei; Wei, Jiasi; Zhao Hui*. PARAMETER ESTIMATION OF PHOTOACOUSTIC SIGNAL FOR GLUCOSE SOLUTIONS USING LAPLACE WAVELET CORRELATION FILTERING AND LEAST SQUARE ESTIMATION. 2nd International Conference on Sensors, Measurement and Intelligent Materials (ICSMIM 2013), NOV 16-17, 2013. SENSORS, MEASUREMENT AND INTELLIGENT MATERIALS II, PTS 1 AND 2 : Applied Mechanics and Materials   VOL.475-476 pp.225-235 2014 (IDS BA4PV, WOS:000336106400045)
7. Liu Zemin, Tao Wei, Zhao Hui*, Cheng Jinke. The Phase Detection Method in Continuous Monitoring of pH during the process of cell culture, Proceedings of SPIE - The International Society for Optical Engineering, v 8759, Eighth International Symposium on Precision Engineering Measurements and Instrumentation, 2013. Proceedings of SPIE - The International Society for Optical Engineering, v 8759, 2013, Eighth International Symposium on Precision Engineering Measurements and Instrumentation.
8. Lu, Chunfeng; Liu, Weiwen; Zhang, Yongjie; Zhao, Hui*. Experimental Estimating Deflection of a Simple Beam Bridge Model Using Grating Eddy Current Sensors. SENSORS, 2012, v12, n8, p: 9987-10000 (IDS: 998BL WOS:000308212100003)
9. Zhang, Yongjie; Liu, Weiwen; Yang, Jinfeng; Lv, Chunfeng; Zhao, Hui*. Design of Compensation Coils for EMI Suppression in Magnetostrictive Linear Position Sensors. SENSORS, 2012, v12, n5, p: 6395-6403 (IDS: 948YE WOS:000304539200069)
10. Weiwen Liu, Hui Zhao, Wei Tao, Chunfeng Lv. Research on combinatorial-code grating eddy-current absolute-position sensor. IEEE Transactions on Instrumentation and Measurement, v 61, n 4, p 1113-1124, 2012
11. Zhang, Haibo; Yang, Jinfeng; Zhao,Hui*; Liu, Manhua; Tao, Wei. Low-cost fastener inspection system on high-speed railway. Advanced Materials Research, v 346, p 738-742, 2012
12. Liu, Weiwen; Zhao, Hui; Tao, Wei; Lv, Chunfeng; Qi, Hongli. Analysis of technical requirements and the self-modification method for a combinatorial code grating eddy-current absolute-position sensor. Measurement Science and Technology, v 23, n 5, May 2012：1-7
13. Yang, Jinfeng; Liu, Manhua; Zhao, Hui*; Tao, Wei. An efficient image-based method for detection of fastener on railway. Advanced Materials Research, v 346, p 731-737, 2012
14. Yang, Jinfeng; Tao, Wei; Lü, Chunfeng; Zhang, Yongjie; Zhao, Hui*. High-speed fastener detection system based on machine vision. Sensors and Transducers, v 145, n 10, p 138-148, 2012
15. Zhang, YJ ; Liu, WW ; Zhang, HB ; Yang, JF ; Zhao, H* . Design and Analysis of a Differential Waveguide Structure to Improve Magnetostrictive Linear Position Sensors. SENSORS, 2011, 11(5), 5508-5519  (IDS: 768PO，IF: 1.774)
16. Jinfeng Yang, Wei Tao, Manhua Liu, Yongjie Zhang, Haibo Zhang and Hui Zhao*. An Efficient Direction Field-Based Method for the Detection of Fasteners on High-Speed Railways. Sensors, 11(8), 7364-7381 , 2011.
17. Haibo Zhang, Wei Tao, Hui Zhao*. Rotational Symmetric Triangulation Sensor Based on an Object Space Mirror. Optical Engineering，v50，n12, 2011. (WOS: 000298289500017)
18. Zhang Haibo, Tao Wei, Zhao Hui*. Vision method of inspecting missing fastening components in high-speed railway. Applied Optics, v 50, n 20, p 3658-3665, July 10, 2011(WOS:000293069000036)
19. Tao Wei, Zhao Hui, Liu Zemin, Cheng Jinke, Cai Rong. A Real-time Measurement System for Parameters of Live Biology Metabolism Process with Fiber Optics. Proceedings of SPIE, v7544, 2010. (WOS:000290255700173)
20. Wei Tao, Hui Zhao, Yi Shen, Weiying Ji. Dimension measurement of the inside shape of special oil pipe with three-dimensional eddoscope. 10th International Symposium on Measurement and Quality Control(ISMQC), Osaka, Japan, 2010.
21. Jinfeng YANG, Manhua LIU, Hui ZHAO*, Wei TAO. An Efficient Image-based Method for Detection of Fastener on Railway. International Conference on Test and Measurement (ICTM), Phuket, Thailand, 2010. (WOS:000309496200113)
22. Yongjie Zhang, Hui Zhao, Weiwen Liu, Wei Tao. Design and realization of differential magnetostrictive absolute position sensor with dual waveguides. 10th International Symposium on Measurement and Quality Control(ISMQC) 2010, 9 Osaka, Japan
23. Wang, Zhanbin; Zhao, Hui; Tao, Wei; Li, Jie. A new visual method for inner-diameter of pipe figure components. Russian Journal of Nondestructive Testing, v 45, n 3, p 214-222, March 2009(IDS: 464XI)
24. Qi Hongli, Zhao Hui, Liu Weiwen. Characteristics analysis and parameters optimization of the grating eddy current displacement sensor. Journal of Zhejiang University SCIENCE A, 2009, 10(7): 1029-1037 (IDS: 466OB)
25. Qi Hongli, Zhao Hui, Liu Weiwen. Parameters Optimization and Nonlinearity Analysis of the Grating Eddy Current Displacement Sensor Using Neural Network and Genetic Algorithm. Journal of Zhejiang University SCIENCE A., 2009, 10(8): 1205-1212 (IDS: 480II)
26. Liu Weiwen, Zhao Hui, Tao Wei, Qi Hongli. Error characteristic and its compensation method for GECS measurement system, Sensors and Actuators A, 2009 155(1): 195-202 (517GS)
27. Xiaodong Tang; Manhua Liu; Hui Zhao*; Wei Tao; Leaf Extraction from Complicated Background. Proceedings of the 2009 2nd International Congress on Image and Signal Processing, CISP'09.
28. Liu, Manhua; Yao, Jianchao; Zhao, Hui; Yap, Kim-Hui. Learning-based image ground segmentation using multiple cues. Proceedings of the 2009 2nd International Congress on Image and Signal Processing, CISP'09. (IDS: BQE82)
29. Zhang Haibo，Zhao Hui，Tao Wei. Laser triangulation displacement measurement method using prism-based optical structure. 2008 IEEE Conference on Robotics, Automation and Mechatronics. pp. 956-60.，2008
30. Wang, Zhanbin; Zhao, Hui; Tao, Wei; Zhang, Haibo. Cloud capturing system based on computer vision for inner-surface of pipe figure components. Proceedings - 1st International Congress on Image and Signal Processing, CISP 2008, v 2, p 334-338, 2008, Proceedings - 1st International Congress on Image and Signal Processing, CISP 2008
31. Qi Hongli, Zhao Hui, Liu Weiwen. Multi-parameters Optimization and Nonlinearity Analysis of the Grating Eddy Current Displacement Sensor. 2008 IEEE International Conference on Robotics, Automation and Mechatronics, RAM 2008, p 950-955, 2008, 2008 IEEE International Conference on Robotics, Automation and Mechatronics, RAM 2008 （IDS: BKS18）
32. Wang, Zhanbin; Zhao, Hui; Tao, Wei; Tang, Yan. A new structured-laser-based system for measuring the 3D inner-contour of pipe figure components. Russian Journal of Nondestructive Testing, v 43, n 6, p 414-422, June 2007