Patents Assigned to HARBIN INSTITUTE OF TECHNOLOGY (WEIHAI)
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Publication number: 20240118387Abstract: A method and application of flash imaging lidar to measure the attenuation coefficient of water bodies are provided. In this novel method, the real time remote measurements are achieved on the attenuation coefficient of fresh water using flash imaging lidar based on the adjacent frame difference (AFD) method and water body backscattering model. The method solves the problems of low accuracy and high error of data obtained from real-time remote sensing measurement of attenuation coefficients of water bodies in the prior art; the slow speed of measurement data obtained when measuring water bodies, and the poor feasibility and reliability effect of the remotely measured attenuation coefficients of water bodies obtained. The experimental and theoretical analyses fully illustrate the feasibility of real-time remote sensing measurement of the attenuation coefficient of water bodies using the AFD method, which has a strong practical value.Type: ApplicationFiled: July 7, 2023Publication date: April 11, 2024Applicant: Harbin Institute of Technology (Weihai)Inventors: Zhaoshuo TIAN, Gang YANG, Zongjie BI, Zihao CUI, Ling WANG, Ke YANG, Liankun LIU
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Patent number: 11913863Abstract: The present invention relates to a microplastic detection device and method based on a pyrolysis-mass spectrometry technology. The microplastic detection device based on a pyrolysis-mass spectrometry technology provided by the present invention is substantially a sealed gas path device system formed connected via pipelines. The device includes a working gas source, a pyrolysis device, a filter and a mass spectrometer which are connected in sequence. After a microplastic sample is placed into the pyrolysis device, the microplastic sample is decomposed in the pyrolysis device, and pyrolysis products from the microplastic sample driven by a carrier gas of the working gas source enter the mass spectrometer for detection and analysis after being filtered by the filter. Furthermore, the present invention provides a microplastic detection method based on a pyrolysis-mass spectrometry. The present invention is widely applied to the field of a microplastic detection technology.Type: GrantFiled: July 26, 2021Date of Patent: February 27, 2024Assignee: HARBIN INSTITUTE OF TECHNOLOGY, WEIHAIInventors: Jie Jiang, Xiangnan Zhang, Na Li, Hengnan Zhang, Jing Gao
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Patent number: 11854307Abstract: In the multi-target detection and tracking method, lidar (2D laser scanner) scans point cloud data of surroundings and transfers the collected data to the edge server. Then, the edge server uploads the data to the cloud. After obtaining the lidar data, point clouds of footsteps are extracted through dynamic point extraction, point clustering, and random forest model, respectively. Footsteps are matched to form human tracking trajectory by using trajectory matching. After the tracking process, the walking information is published to the users, in a visual form. Meanwhile, the gait parameters are saved into files, including walking speed and step length, when human is detected. Comparing to the visual sensor based human tracking methods, the present invention employs lidar to avoid the interference of ambient light, which leads to easier implementation and larger universality, especially for multi-target scenarios.Type: GrantFiled: November 2, 2021Date of Patent: December 26, 2023Assignee: HARBIN INSTITUTE OF TECHNOLOGY, WEIHAIInventors: Xin Hu, Deqiong Ding, Zhengzuo Li, Zhiyuan Zhou, Dianhui Chu
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Patent number: 11498110Abstract: A fine blanking device and method for forming a friction plate with friction material layers. The fine blanking device includes an upper die, a lower die, a guide mechanism, a punch and a counter punch. Upper and lower blank holders are respectively provided at outer circumferences of the punch and the counter punch. The upper and lower blank holders are respectively provided with a buffer mechanism. Friction material powders are sintered on both sides of the base sheet. The friction material layers are trimmed and planished by hot pressing. The base sheet with the friction material layers is fixed by the upper blank holder and the lower blank holder. A tooth profile with an absolute shear fractural surface is formed. The fixing indentation of the V-shaped structure of the friction material layers is cut off for obtaining a finished friction plate product with the friction material layers.Type: GrantFiled: August 9, 2020Date of Patent: November 15, 2022Assignees: Southwest Technology and Engineering Research Institute, Harbin Institute of Technology at WeihaiInventors: Qiang Chen, Gang Chen, Xusheng Chang, Hongming Zhang, Dayu Shu, Hong Zhan, Lin Xiang, Yunliang Xiang, Yan Tang
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Publication number: 20220309835Abstract: In the multi-target detection and tracking method, lidar (2D laser scanner) scans point cloud data of surroundings and transfers the collected data to the edge server. Then, the edge server uploads the data to the cloud. After obtaining the lidar data, point clouds of footsteps are extracted through dynamic point extraction, point clustering, and random forest model, respectively. Footsteps are matched to form human tracking trajectory by using trajectory matching. After the tracking process, the walking information is published to the users, in a visual form. Meanwhile, the gait parameters are saved into files, including walking speed and step length, when human is detected. Comparing to the visual sensor based human tracking methods, the present invention employs lidar to avoid the interference of ambient light, which leads to easier implementation and larger universality, especially for multi-target scenarios.Type: ApplicationFiled: November 2, 2021Publication date: September 29, 2022Applicant: Harbin Institute of Technology, WeihaiInventors: Xin HU, Deqiong DING, Zhengzuo LI, Zhiyuan ZHOU, Dianhui CHU
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Patent number: 11229940Abstract: A method for manufacturing a hollow camshaft is provided, and more particularly, a method for manufacturing a combined hollow camshaft by an axial-compression upsetting-deformation technique. The present method solves a problem that the current camshaft manufactured in an internal high-pressure expansion manner in the prior art has the insufficient locking force to cause the loosening of a cam. The method is as follows: a camshaft is formed by combining two independent units, namely a cam and a shaft tube. Non-circular countersinks are distributed on two sides of the cam. Thrust steps are formed on the shaft tube correspondingly. The cam is placed between the two thrust steps of the shaft tube. The locking force is applied to the cam by utilizing the thrust steps on the two sides of the cam based on thermal expansion and contraction. Simultaneously, the thrust steps lock the cam with the countersinks.Type: GrantFiled: June 3, 2020Date of Patent: January 25, 2022Assignees: HARBIN INSTITUTE OF TECHNOLOGY, WEIHAIInventors: Guannan Chu, Lei Sun
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Patent number: 9808850Abstract: A process for forming a hollow member with A complicated cross-section wherein a section of a tube blank first undergoes a bending deformation due to its internal pressure and bend moment generated by the upsetting of an upper die, and is then compressed to be molded under the support of the internal pressure. The process of the invention does not require the reshaping step at an increased pressure. The process can make a hollow member with a complicated cross-section formed under a low pressure, and solves a technical bottleneck relating to a conventional process for forming this kind of members that is subject to an ultrahigh pressure generator.Type: GrantFiled: November 1, 2016Date of Patent: November 7, 2017Assignee: HARBIN INSTITUTE OF TECHNOLOGY (WEIHAI)Inventors: Guannan Chu, Yanli Lin, Shijian Yuan
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Publication number: 20170173655Abstract: A process for forming a hollow member with A complicated cross-section wherein a section of a tube blank first undergoes a bending deformation due to its internal pressure and bend moment generated by the upsetting of an upper die, and is then compressed to be molded under the support of the internal pressure. The process of the invention does not require the reshaping step at an increased pressure. The process can make a hollow member with a complicated cross-section formed under a low pressure, and solves a technical bottleneck relating to a conventional process for forming this kind of members that is subject to an ultrahigh pressure generator.Type: ApplicationFiled: November 1, 2016Publication date: June 22, 2017Applicant: HARBIN INSTITUTE OF TECHNOLOGY (WEIHAI)Inventors: Guannan CHU, Yanli LIN, Shijian YUAN