Patents by Inventor Changsheng YANG
Changsheng YANG 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: 12002242Abstract: The present invention discloses a CIELAB color space-based quantitative testing and analysis method for rice seed viability, and the method comprises removing husks on surfaces of rice seeds, soaking and imbibing the rice seeds without the husks removed, staining the rice seeds by using a TTC staining solution, and longitudinally cutting the rice seeds along embryos; converting the longitudinal section image of the rice seed from an RGB color space to a CIELAB color space, and calculating L value, a value and b value per unit area of the rice embryo as a staining intensity per unit area, and converting the staining intensity into a rice seed viability score according to a pre-established conversion model of the staining intensity and the rice seed viability score. According to the present invention, a reference result can be provided for the rapid, accurate and objective evaluation of the seed viability.Type: GrantFiled: January 25, 2024Date of Patent: June 4, 2024Assignee: Quality Standard and Testing Technology Research Institute, Yunnan Academy of Agricultural ScienceInventors: Yanfang Liu, Ruixi Han, Juxiang Qiao, Jiangchuan Fan, Changsheng Yin, Xiaohong Yang
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Patent number: 11916399Abstract: This application describes a coil. The coil includes an output terminal, an input terminal, and a wire-winding part that is connected between the output terminal and the input terminal. A slot is disposed on at least a part of the wire-winding part, and a depth of the slot in any direction of a cross section of the wire-winding part is less than or equal to a distance between two points that are the farthest away from each other on the cross section of the wire-winding part. The wire-winding part is a metal conductor made through spiral winding. The input terminal and the output terminal are configured to connect the wire-winding part to an external circuit.Type: GrantFiled: May 19, 2020Date of Patent: February 27, 2024Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Changsheng Pei, Yongfa Zhu, Heqian Yang, Jinsen Cai
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Patent number: 11862925Abstract: A tunable narrow-linewidth photo-generated microwave source based on polarization control includes a high-reflectivity fiber grating, a high-gain fiber, a low-reflectivity polarization-maintaining fiber grating, a stress adjusting device, a single-mode semiconductor pump laser, an optical wavelength division multiplexer, a polarization beam splitter, a polarization controller, an optical coupler, and a photoelectric detector. Birefringence distribution in the low-reflectivity polarization-maintaining fiber grating is controlled by adjusting a stress magnitude of the stress adjusting device to the low-reflectivity polarization fiber grating, thereby controlling a laser frequency working in different polarization modes in a resonant cavity, and a tunable narrow-linewidth photo-generated microwave source is generated by a beat-frequency technology using a dual-wavelength narrow-linewidth laser with variable frequency intervals.Type: GrantFiled: October 30, 2018Date of Patent: January 2, 2024Assignee: SOUTH CHINA UNIVERSITY OF TECHNOLOGYInventors: Shanhui Xu, Qilai Zhao, Zhitao Zhang, Changsheng Yang, Zhouming Feng, Zhongmin Yang
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Publication number: 20220216666Abstract: Disclosed is a multimode interference effect-based wide tunable single-frequency optical fiber laser device. The laser device comprises a high-reflectivity chirped optical fiber grating, a high-gain optical fiber, a low-reflectivity chirped optical fiber grating, a pump source, an optical circulator, an optical fiber etalon and an SMS optical fiber structure apparatus. The high-reflectivity chirped optical fiber grating, the high-gain optical fiber and the low-reflectivity chirped optical fiber grating are connected in sequence to form a short linear resonant cavity; the optical circulator, the optical fiber etalon and the SMS optical fiber structure apparatus form a ring cavity, a stress loader is fixed onto the SMS optical fiber structure apparatus, and a transmitting wavelength of the SMS optical fiber structure apparatus is changed and tunable filtering by the SMS optical fiber structure apparatus is realized by loading stress to the SMS optical fiber structure apparatus.Type: ApplicationFiled: October 28, 2019Publication date: July 7, 2022Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGYInventors: Changsheng YANG, Shanhui XU, Linhuan HUANG, Zhongmin YANG, Zhouming FENG
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Publication number: 20220131329Abstract: The invention discloses a multi-wavelength and single-frequency Q-switching optical fiber laser device. The laser device comprises a saturable absorber, a high gain optical fiber, a polarization-maintaining multi-wavelength narrow-band fiber Bragg grating, a resonant cavity temperature control module, a polarization-maintaining wavelength division multiplexer, a pump source and a polarization-maintaining light isolator. By taking a highly doped phosphate optical fiber as a laser gain medium, two ends of the optical fiber device are connected with the saturable absorber and the polarization-maintaining multi-wavelength narrow-band fiber Bragg grating respectively to form a short linear laser cavity.Type: ApplicationFiled: October 28, 2019Publication date: April 28, 2022Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGYInventors: Shanhui XU, Kunyi LI, Changsheng YANG, Qilai ZHAO, Zhouming FENG, Zhongmin YANG
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Publication number: 20210351558Abstract: A tunable narrow-linewidth photo-generated microwave source based on polarization control includes a high-reflectivity fiber grating, a high-gain fiber, a low-reflectivity polarization-maintaining fiber grating, a stress adjusting device, a single-mode semiconductor pump laser, an optical wavelength division multiplexer, a polarization beam splitter, a polarization controller, an optical coupler, and a photoelectric detector. Birefringence distribution in the low-reflectivity polarization-maintaining fiber grating is controlled by adjusting a stress magnitude of the stress adjusting device to the low-reflectivity polarization fiber grating, thereby controlling a laser frequency working in different polarization modes in a resonant cavity, and a tunable narrow-linewidth photo-generated microwave source is generated by a beat-frequency technology using a dual-wavelength narrow-linewidth laser with variable frequency intervals.Type: ApplicationFiled: October 30, 2018Publication date: November 11, 2021Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGYInventors: Shanhui XU, Qilai ZHAO, Zhitao ZHANG, Changsheng YANG, Zhouming FENG, Zhongmin YANG
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Patent number: 10901247Abstract: The present invention provides a repetition frequency-tunable optical frequency comb generated by basis of optical feedback. The optical frequency comb comprises a single-frequency laser resonant cavity, a wavelength division multiplexer, a single-mode semiconductor pump light source, an optical circulator, a first optical fiber coupler, a second optical fiber coupler, a photoelectric detector, a highly-stable signal source, an error signal processing system, a laser frequency modulation device and a tunable laser-delay module. The present invention performs delay-time processing to the single-frequency laser by the tunable laser-delay module, and achieves an optical feedback by the optical circulator for injecting to the resonant cavity, generating a series of tunable laser longitudinal modes with equal frequency space.Type: GrantFiled: January 1, 2018Date of Patent: January 26, 2021Assignee: South China University of TechnologyInventors: Shanhui Xu, Qilai Zhao, Zhongmin Yang, Zhouming Feng, Changsheng Yang
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Publication number: 20200337548Abstract: The invention discloses a leading-in device of a flexible ureteroscope and a using method thereof and a uretero-pyeloscope system. The leading-in device of the flexible ureteroscope includes a leading-in sheath component, the leading-in sheath component includes a leading-in sheath with elasticity, and the leading-in sheath is a strip-type tube body matched with the flexible ureteroscope. While the flexible ureteroscope is inserted and connected in the leading-in sheath, an outer end part of the flexible ureteroscope is aligned with an outer end part of the leading-in sheath or slightly protruded out of the outer end part of the leading-in sheath. The invention is capable of enabling the flexible ureteroscope to be accurately inserted into a renal pelvis, putting in place by one step, using conveniently, reducing injury of a patient, and reducing the cost of an operation.Type: ApplicationFiled: April 28, 2020Publication date: October 29, 2020Inventors: Min Lin, Changsheng Yang, Mu Wang
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Multi-wavelength narrow-linewidth single-frequency optical fiber laser source for laser radar system
Patent number: 10693274Abstract: A multi-wavelength single-frequency optical fiber laser source for a laser radar system includes a resonant cavity composed of a high-reflectivity chirped optical fiber grating, a high gain optical fiber and a low-reflectivity chirped optical fiber grating, a single-mode semiconductor pump laser served as a pump light source, an optical wavelength division multiplexer, an optical coupler, an optical isolator, an optical circulator, an optical filter module, and a semiconductor optical amplifier. The pump light source performs optical fiber core pumping with respect to the high gain optical fiber. A portion of the wide-spectrum laser is filtered by the optical filter module to obtain a wavelength corresponding to a specific central frequency. Multi-wavelength laser lasing with a narrow linewidth and single longitudinal mode is implemented by combining a short linear resonant cavity structure and the optical filter module.Type: GrantFiled: December 19, 2016Date of Patent: June 23, 2020Assignee: SOUTH CHINA UNIVERSITY OF TECHNOLOGYInventors: Shanhui Xu, Zhongmin Yang, Yuning Zhang, Zhouming Feng, Changsheng Yang -
Publication number: 20200146494Abstract: The present invention discloses a telescopic window curtain rod with a self-locking function, comprising an outer tube and an inner tube, wherein the inner tube may be sleeved in an inner cavity of the outer tube and may slide in the length direction of the outer tube; springs are clamped at one end of the inner tube and a part of the springs extends out the inner tube, an elastic sheet is tilted between the two springs, one end of the elastic sheet is fixed on the inner side surface of the inner tube and the other end thereof is slanted to the direction of an opening; the elastic sheet is provided with a shielding sheet at the distal end away from the end surface of the inner tube, and the elastic sheet is fixedly connected with the end surface of the spring on both sides.Type: ApplicationFiled: November 14, 2018Publication date: May 14, 2020Inventor: CHANGSHENG YANG
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Publication number: 20190310498Abstract: The present invention provides a repetition frequency-tunable optical frequency comb generated by basis of optical feedback. The optical frequency comb comprises a single-frequency laser resonant cavity, a wavelength division multiplexer, a single-mode semiconductor pump light source, an optical circulator, a first optical fiber coupler, a second optical fiber coupler, a photoelectric detector, a highly-stable signal source, an error signal processing system, a laser frequency modulation device and a tunable laser-delay module. The present invention performs delay-time processing to the single-frequency laser by the tunable laser-delay module, and achieves an optical feedback by the optical circulator for injecting to the resonant cavity, generating a series of tunable laser longitudinal modes with equal frequency space.Type: ApplicationFiled: January 1, 2018Publication date: October 10, 2019Inventors: Shanhui Xu, Qilai Zhao, Zhongmin Yang, Zhouming Feng, Changsheng Yang
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MULTI-WAVELENGTH NARROW-LINEWIDTH SINGLE-FREQUENCY OPTICAL FIBER LASER SOURCE FOR LASER RADAR SYSTEM
Publication number: 20190252845Abstract: A multi-wavelength single-frequency optical fiber laser source for a laser radar system includes a resonant cavity composed of a high-reflectivity chirped optical fiber grating, a high gain optical fiber and a low-reflectivity chirped optical fiber grating, a single-mode semiconductor pump laser served as a pump light source, an optical wavelength division multiplexer, an optical coupler, an optical isolator, an optical circulator, an optical filter module, and a semiconductor optical amplifier. The pump light source performs optical fiber core pumping with respect to the high gain optical fiber. A portion of the wide-spectrum laser is filtered by the optical filter module to obtain a wavelength corresponding to a specific central frequency. Multi-wavelength laser lasing with a narrow linewidth and single longitudinal mode is implemented by combining a short linear resonant cavity structure and the optical filter module.Type: ApplicationFiled: December 19, 2016Publication date: August 15, 2019Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGYInventors: Shanhui XU, Zhongmin YANG, Yuning ZHANG, Zhouming FENG, Changsheng YANG -
Patent number: 10003167Abstract: A width-tunable single-frequency fiber laser light source for coherent optical orthogonal frequency division multiplexing system including a chirped fiber grating with high reflectivity, a high gain optical fiber, a chirped fiber grating with low reflectivity, a single-mode semiconductor pump laser, an optical wavelength division multiplexer, an optical coupler, an optical circulator, and a tunable optical filter module is provided. The chirped fiber grating with low reflectivity and the chirped fiber grating with high reflectivity together serve as a front cavity mirror and a back cavity mirror of a resonant cavity to realize laser oscillation. After a laser with broad spectrum output from the optical wavelength division multiplexer is split by the optical coupler, a part of the laser passes through the optical circulator to enter the tunable optical filter module.Type: GrantFiled: December 31, 2015Date of Patent: June 19, 2018Assignee: SOUTH CHINA UNIVERSITY OF TECHNOLOGYInventors: Shanhui Xu, Zhongmin Yang, Yuanfei Zhang, Zhouming Feng, Changsheng Yang
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Patent number: 9996679Abstract: In some embodiments, a method includes sending an authentication request to a client device to obtain a utilization code in response to a request from the client device to access data. The utilization code is uniquely associated with the client device. The method includes obtaining an authentication response including the utilization code from the client device and authenticating the client device if the utilization code matches a utilization identifier stored in a database. The method includes generating an encryption key using a seed based at least in part on the utilization code and encrypting the data with the encryption key to generate encrypted data and sending, when the utilization code matches the utilization identifier stored in the database, the encrypted data to the client device without requiring a user of the client device to login.Type: GrantFiled: May 3, 2017Date of Patent: June 12, 2018Assignee: Pegasus Media Security, LLCInventors: Paul Kline, David Weinstein, Allan Weinstein, Changsheng Yang
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Publication number: 20180097332Abstract: A width-tunable single-frequency fiber laser light source for coherent optical orthogonal frequency division multiplexing system including a chirped fiber grating with high reflectivity, a high gain optical fiber, a chirped fiber grating with low reflectivity, a single-mode semiconductor pump laser, an optical wavelength division multiplexer, an optical coupler, an optical circulator, and a tunable optical filter module is provided. The chirped fiber grating with low reflectivity and the chirped fiber grating with high reflectivity together serve as a front cavity mirror and a back cavity mirror of a resonant cavity to realize laser oscillation. After a laser with broad spectrum output from the optical wavelength division multiplexer is split by the optical coupler, a part of the laser passes through the optical circulator to enter the tunable optical filter module.Type: ApplicationFiled: December 31, 2015Publication date: April 5, 2018Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGYInventors: Shanhui XU, Zhongmin YANG, Yuanfei ZHANG, Zhouming FENG, Changsheng YANG
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Publication number: 20170323087Abstract: In some embodiments, a method includes sending an authentication request to a client device to obtain a utilization code in response to a request from the client device to access data. The utilization code is uniquely associated with the client device. The method includes obtaining an authentication response including the utilization code from the client device and authenticating the client device if the utilization code matches a utilization identifier stored in a database. The method includes generating an encryption key using a seed based at least in part on the utilization code and encrypting the data with the encryption key to generate encrypted data and sending, when the utilization code matches the utilization identifier stored in the database, the encrypted data to the client device without requiring a user of the client device to login.Type: ApplicationFiled: May 3, 2017Publication date: November 9, 2017Applicant: Pegasus Media Security, LLCInventors: Paul KLINE, David WEINSTEIN, Allan WEINSTEIN, Changsheng YANG
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Patent number: 9787050Abstract: A tunable narrow-linewidth single-frequency linear-polarization laser device comprising a heat sink, a pumping source packaged on the heat sink, a first and second collimating lenses, a laser back cavity mirror, a thermal optical tunable filter, a rare-earth-ion heavily-doped multicomponent glass optical fiber, a super-structure polarization-maintaining fiber grating, a polarization-maintaining optical isolator, a polarization-maintaining optical fiber, and a thermoelectric refrigerating machine.Type: GrantFiled: December 4, 2014Date of Patent: October 10, 2017Assignee: South China University of TechnologyInventors: Shanhui Xu, Changsheng Yang, Zhongmin Yang, Zhouming Feng, Qinyuan Zhang, Zhonghong Jiang
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Patent number: 9519758Abstract: A method detects unauthorized access of data, and includes receiving data from a content provider by a content reproducing device; storing the received data in a memory storage device of the content reproducing device; obtaining an address range of a buffer of the content reproducing device; intercepting system application programming interface calls related to memory access of the address range of the buffer; comparing the intercepted system application programming interface calls to an expected sequence of memory access calls; and determining that a particular memory access call is unauthorized when the particular memory access call accesses the address range of the buffer while not belonging to the expected sequence of memory access calls.Type: GrantFiled: February 4, 2014Date of Patent: December 13, 2016Assignee: Pegasus Media Security, LLCInventors: Paul A. Kline, Allan M. Weinstein, David J. Weinstein, Changsheng Yang
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Publication number: 20160261085Abstract: A tunable narrow-linewidth single-frequency linear-polarization laser device comprising a heat sink, a pumping source packaged on the heat sink, a first and second collimating lenses, a laser back cavity mirror, a thermal optical tunable filter, a rare-earth-ion heavily-doped multicomponent glass optical fiber, a super-structure polarization-maintaining fiber grating, a polarization-maintaining optical isolator, a polarization-maintaining optical fiber, and a thermoelectric refrigerating machine.Type: ApplicationFiled: December 4, 2014Publication date: September 8, 2016Applicant: South China University of TechnologyInventors: Shanhui Xu, Changsheng Yang, Zhongmin Yang, Zhouming Feng, Qinyuan Zhang, Zhonghong Jiang
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Publication number: 20150220707Abstract: A method detects unauthorized access of data, and includes receiving data from a content provider by a content reproducing device; storing the received data in a memory storage device of the content reproducing device; obtaining an address range of a buffer of the content reproducing device; intercepting system application programming interface calls related to memory access of the address range of the buffer; comparing the intercepted system application programming interface calls to an expected sequence of memory access calls; and determining that a particular memory access call is unauthorized when the particular memory access call accesses the address range of the buffer while not belonging to the expected sequence of memory access calls.Type: ApplicationFiled: February 4, 2014Publication date: August 6, 2015Applicant: Pegasus Media Security, LLCInventors: Paul A. KLINE, Allan M. WEINSTEIN, David J. WEINSTEIN, Changsheng YANG