Patents by Inventor Guiyun TIAN
Guiyun TIAN has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11808632Abstract: A four-shaft panoramic scanning temperature measuring device with a circulating water-cooling device is provided, which not only improves the working reliability of the probe, but also increases the overall flexibility and scanning measurement efficiency. The circulating water-cooling device is self-cooled. Compared with the conventional single-circulation water-cooling way, the design of five cooling cavities can achieve higher circulating water-cooling efficiency. The four-shaft structure includes a shaft structure for translation, a shaft structure for rotation, a shaft structure for swinging, and a shaft structure with coaxial sight pipe and light pipe. The design of the four-shaft structure is able to panoramically scan the high-temperature components inside the turbine. The temperature measuring device integrates functions of cooling, swinging, translating and rotating together, which solves problems of large size and complex control of the conventional temperature measuring device.Type: GrantFiled: July 28, 2021Date of Patent: November 7, 2023Assignee: University of Electronic Science and Technology of ChinaInventors: Chao Wang, Jing Jiang, Yi Niu, Anmei Qiu, Zezhan Zhang, Peifeng Yu, Guiyun Tian, Shan Gao
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Patent number: 11680851Abstract: A device for measuring surface temperature of a turbine blade based on a rotatable prism includes a probe, a prism rotating apparatus and an optical focusing apparatus. The prism rotating apparatus and the optical focusing apparatus are located inside the probe. The probe includes a probe outer casing, a probe inner casing, a water-cooled casing pipe, a sapphire window piece, a quartz prism, a light pipe, a collimating lens, a focusing lens and an infrared array detector. The prism rotating apparatus includes a rotary motor, a worm, a gear and a prism rotary table, the rotary motor rotates to drive the prism rotary table to rotate. The optical focusing apparatus includes a telescopic motor, a coupler, a lead screw and a drive rod, the telescopic motor rotates to drive the lead screw, so as to further drive the drive rod to move along the slot.Type: GrantFiled: May 20, 2021Date of Patent: June 20, 2023Assignee: University of Electronic Science and Technology of ChinaInventors: Chao Wang, Jing Jiang, Anmei Qiu, Yekui Zhong, Yi Niu, Peifeng Yu, Zezhan Zhang, Ying Duan, Xueke Gou, Guiyun Tian
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Publication number: 20220412500Abstract: The invention discloses an NDT device for pipeline, belonging to the field of NDT, including a mobile carrier, which moves with fluid in pipeline or is moved by an actuator; a probe testing assembly, which includes a testing component installed on the mobile carrier and having a testing element in which testing probe is encapsulated; a data processing unit, a first signal conditioning unit and a second signal conditioning unit, wherein the testing probe includes an excitation coil, a receiving coil and a passive resonance coil between the excitation coil and the receiving coil. For the invention, no more magnetizing treatment device is needed for testing, so that the system volume is greatly reduced, thereby reducing the requirement of the testing system of the invention on the internal cleanliness of a pipeline, improving flexibility of equipment in the pipeline of the testing system, and greatly reducing the system cost.Type: ApplicationFiled: November 15, 2021Publication date: December 29, 2022Inventors: Bin GAO, Shiqiang JIANG, Liang SHEN, Guiyun TIAN, Fei LUO, Yong ZHANG, Yupei YANG
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Method for measuring equivalent circuit parameters and resonant frequency of piezoelectric resonator
Patent number: 11366152Abstract: A method for measuring equivalent circuit parameters and resonant frequency of a piezoelectric resonator, by which the phase-frequency curve of the piezoelectric resonator is measured, and the resonant frequency and the anti-resonant frequency are obtained. Then, the slopes of the phase-frequency curve at the resonant frequency and the anti-resonant frequency are respectively measured. The resonant angular frequency and the anti-resonant angular frequency are also calculated. Finally, the equivalent circuit parameters of the piezoelectric resonator are obtained by solving a system of nonlinear equations.Type: GrantFiled: October 29, 2019Date of Patent: June 21, 2022Assignee: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINAInventors: Dong Liu, Yan Yan, Xiaoting Xiao, Bin Gao, Guiyun Tian -
Publication number: 20220099496Abstract: A four-shaft panoramic scanning temperature measuring device with a circulating water-cooling device is provided, which not only improves the working reliability of the probe, but also increases the overall flexibility and scanning measurement efficiency. The circulating water-cooling device is self-cooled. Compared with the conventional single-circulation water-cooling way, the design of five cooling cavities can achieve higher circulating water-cooling efficiency. The four-shaft structure includes a shaft structure for translation, a shaft structure for rotation, a shaft structure for swinging, and a shaft structure with coaxial sight pipe and light pipe. The design of the four-shaft structure is able to panoramically scan the high-temperature components inside the turbine. The temperature measuring device integrates functions of cooling, swinging, translating and rotating together, which solves problems of large size and complex control of the conventional temperature measuring device.Type: ApplicationFiled: July 28, 2021Publication date: March 31, 2022Inventors: Chao Wang, Jing Jiang, Yi Niu, Anmei Qiu, Zezhan Zhang, Peifeng Yu, Guiyun Tian, Shan Gao
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Publication number: 20210270674Abstract: A device for measuring surface temperature of a turbine blade based on a rotatable prism includes a probe, a prism rotating apparatus and an optical focusing apparatus. The prism rotating apparatus and the optical focusing apparatus are located inside the probe. The probe includes a probe outer casing, a probe inner casing, a water-cooled casing pipe, a sapphire window piece, a quartz prism, a light pipe, a collimating lens, a focusing lens and an infrared array detector. The prism rotating apparatus includes a rotary motor, a worm, a gear and a prism rotary table, the rotary motor rotates to drive the prism rotary table to rotate. The optical focusing apparatus includes a telescopic motor, a coupler, a lead screw and a drive rod, the telescopic motor rotates to drive the lead screw, so as to further drive the drive rod to move along the slot.Type: ApplicationFiled: May 20, 2021Publication date: September 2, 2021Inventors: Chao Wang, Jing Jiang, Anmei Qiu, Yekui Zhong, Yi Niu, Peifeng Yu, Zezhan Zhang, Ying Duan, Xueke Gou, Guiyun Tian
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METHOD FOR MEASURING EQUIVALENT CIRCUIT PARAMETERS AND RESONANT FREQUENCY OF PIEZOELECTRIC RESONATOR
Publication number: 20200158769Abstract: A method for measuring equivalent circuit parameters and resonant frequency of a piezoelectric resonator, by which the phase-frequency curve of the piezoelectric resonator is measured, and the resonant frequency and the anti-resonant frequency are obtained. Then, the slopes of the phase-frequency curve at the resonant frequency and the anti-resonant frequency are respectively measured. The resonant angular frequency and the anti-resonant angular frequency are also calculated. Finally, the equivalent circuit parameters of the piezoelectric resonator are obtained by solving a system of nonlinear equations.Type: ApplicationFiled: October 29, 2019Publication date: May 21, 2020Applicant: University of Electronic Science and Technology of ChinaInventors: Dong LIU, Yan YAN, Xiaoting XIAO, Bin GAO, Guiyun TIAN -
Patent number: 10229486Abstract: A method automatically separates out the defect image from a thermogram sequence based on the physical characteristics of the defect of a conductive material in electromagnetic field. Defect area radiates more heat than other area, when it is mapped to the histogram of the image to be separated, the defect area is located in the top-end of histogram, and the proportion of defect area is smaller to the background or other area. The method equally divides the histogram of the image to be separated into multi groups, and calculates the first derivative ki of total pixel number Si of group i, finds the maximum absolute value of ki, i.e. |ki|max, where i is expressed as imax; if imax is the last group, Wn is regarded as threshold T, otherwise, Wimax+1 is selected as threshold T. The pixels that less than threshold T are removed to obtain the defect image in ECPT.Type: GrantFiled: May 30, 2017Date of Patent: March 12, 2019Assignee: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINAInventors: Bin Gao, Xiaoqing Li, Guiyun Tian
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Publication number: 20180068432Abstract: A method automatically separates out the defect image from a thermogram sequence based on the physical characteristics of the defect of a conductive material in electromagnetic field. Defect area radiates more heat than other area, when it is mapped to the histogram of the image to be separated, the defect area is located in the top-end of histogram, and the proportion of defect area is smaller to the background or other area. The method equally divides the histogram of the image to be separated into multi groups, and calculates the first derivative ki of total pixel number Si of group i, finds the maximum absolute value of ki, i.e. |ki|max, where i is expressed as imax; if imax is the last group, Wn is regarded as threshold T, otherwise, Wimax+1 is selected as threshold T. The pixels that less than threshold T are removed to obtain the defect image in ECPT.Type: ApplicationFiled: May 30, 2017Publication date: March 8, 2018Applicant: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINAInventors: Bin GAO, Xiaoqing LI, Guiyun TIAN