Patents by Inventor Lihan Liu
Lihan Liu 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: 11872060Abstract: A method for calculating physiological parameters includes: selecting a section of time domain signal corresponding to at least one signal of red light and infrared light obtained by sampling, and performing a conversion from time domain to frequency domain to obtain a corresponding frequency domain signal; selecting all rational frequency spectrum peak information, calculating energy information of selected reasonable frequency spectrum peaks, and forming a frequency spectrum peak energy ratio sequence; constructing a stability coefficient according to the frequency spectrum peak energy ratio sequence, and if the stability coefficient is low, constructing a compensation coefficient by using the frequency spectrum peak energy ratio sequence; and compensating for at least one of the time domain signal and the frequency domain signal by using the compensation coefficient, and calculating based on at least one of the compensated time domain signal and the frequency domain signal to obtain the physiological paramType: GrantFiled: October 19, 2021Date of Patent: January 16, 2024Assignee: Shenzhen Mindray Bio-Medical Electronics Co., Ltd.Inventors: Fei Han, Fei Ye, Zuming Yao, Fei Zhang, Xianliang He, Lihan Liu, Ming Li, Xingliang Jin
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Patent number: 11478198Abstract: Disclosed are methods, apparatuses, and systems for performing physiological parameter signal fusion. By respectively analyzing a plurality of input physiological parameter signals, and obtaining a feature of each physiological parameter signal; according to the feature of each physiological parameter signal, obtaining and outputting a fusion state of the plurality of the physiological parameter signals; if the fusion state is a fusion of the at least two physiological parameter signals with the first physiological parameter signal is dominant, highlighting the first physiological parameter signal; and if the fusion state is a fusion of the at least two physiological parameter signals with the second physiological parameter signal is dominant, highlighting the second physiological parameter signal.Type: GrantFiled: August 16, 2018Date of Patent: October 25, 2022Assignee: Shenzhen Mindray Bio-Medical Electronics Co., Ltd.Inventors: Zehui Sun, Bailei Sun, Chaocheng Xie, Jianwei Su, Sanchao Liu, Wenyu Ye, Lihan Liu, Ming Li
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Patent number: 11457873Abstract: One variation of a method for identifying homology of physiological signals comprises: receiving signal data of two different types of physiological signals; performing waveform matching on the signal data of the two different types of physiological signals to determine waveform matching information in the signal data of the two types of physiological signals; calculating an associative feature between the signal data of the two different types of physiological signals according to the waveform matching information; calculating a homology reference coefficient corresponding to the two different types of physiological signals according to the associative feature; and determining that the two different types of physiological signals are homologous when the homology reference coefficient is greater than a preset value.Type: GrantFiled: November 4, 2019Date of Patent: October 4, 2022Assignee: SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD.Inventors: Sanchao Liu, Jianwei Su, Zehui Sun, Bailei Sun, Wenyu Ye, Lihan Liu, Ming Li
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Publication number: 20220031252Abstract: A method for calculating physiological parameters includes: selecting a section of time domain signal corresponding to at least one signal of red light and infrared light obtained by sampling, and performing a conversion from time domain to frequency domain to obtain a corresponding frequency domain signal; selecting all rational frequency spectrum peak information, calculating energy information of selected reasonable frequency spectrum peaks, and forming a frequency spectrum peak energy ratio sequence; constructing a stability coefficient according to the frequency spectrum peak energy ratio sequence, and if the stability coefficient is low, constructing a compensation coefficient by using the frequency spectrum peak energy ratio sequence; and compensating for at least one of the time domain signal and the frequency domain signal by using the compensation coefficient, and calculating based on at least one of the compensated time domain signal and the frequency domain signal to obtain the physiological paramType: ApplicationFiled: October 19, 2021Publication date: February 3, 2022Inventors: Fei HAN, Fei YE, Zuming YAO, Fei ZHANG, Xianliang HE, Lihan LIU, Ming LI
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Patent number: 11154250Abstract: A method for calculating physiological parameters includes: selecting a section of time domain signal corresponding to at least one signal of red light and infrared light obtained by sampling, and performing a conversion from time domain to frequency domain to obtain a corresponding frequency domain signal; selecting all rational frequency spectrum peak information, calculating energy information of selected reasonable frequency spectrum peaks, and forming a frequency spectrum peak energy ratio sequence; constructing a stability coefficient according to the frequency spectrum peak energy ratio sequence, and if the stability coefficient is low, constructing a compensation coefficient by using the frequency spectrum peak energy ratio sequence; and compensating for at least one of the time domain signal and the frequency domain signal by using the compensation coefficient, and calculating based on at least one of the compensated time domain signal and the frequency domain signal to obtain the physiological paramType: GrantFiled: November 28, 2018Date of Patent: October 26, 2021Assignee: Shenzhen Mindray Bio-Medical Electronics Co., Ltd.Inventors: Fei Han, Fei Ye, Zuming Yao, Fei Zhang, Xianliang He, Lihan Liu, Ming Li
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Publication number: 20200060625Abstract: One variation of a method for identifying homology of physiological signals comprises: receiving signal data of two different types of physiological signals; performing waveform matching on the signal data of the two different types of physiological signals to determine waveform matching information in the signal data of the two types of physiological signals; calculating an associative feature between the signal data of the two different types of physiological signals according to the waveform matching information; calculating a homology reference coefficient corresponding to the two different types of physiological signals according to the associative feature; and determining that the two different types of physiological signals are homologous when the homology reference coefficient is greater than a preset value.Type: ApplicationFiled: November 4, 2019Publication date: February 27, 2020Inventors: Sanchao LIU, Jianwei SU, Zehui SUN, Bailei SUN, Wenyu YE, Lihan LIU, Ming LI
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Publication number: 20190000397Abstract: Disclosed are methods, apparatuses, and systems for performing physiological parameter signal fusion. By respectively analyzing a plurality of input physiological parameter signals, and obtaining a feature of each physiological parameter signal; according to the feature of each physiological parameter signal, obtaining and outputting a fusion state of the plurality of the physiological parameter signals; if the fusion state is a fusion of the at least two physiological parameter signals with the first physiological parameter signal is dominant, highlighting the first physiological parameter signal; and if the fusion state is a fusion of the at least two physiological parameter signals with the second physiological parameter signal is dominant, highlighting the second physiological parameter signal.Type: ApplicationFiled: August 16, 2018Publication date: January 3, 2019Inventors: Zehui Sun, Bailei Sun, Chaocheng Xie, Jianwei Su, Sanchao Liu, Wenyu Ye, Lihan Liu, Ming Li
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Patent number: 9636042Abstract: This disclosure relates to methods and apparatus for detecting respiratory rate. The method for detecting respiratory rate may include: sampling respiratory waveform data in a time sequence; detecting respiratory cycles from the sampled respiratory waveform data; calculating variation degree for the sampled respiratory waveform data; calculating base length base on the variation degree; calculating smoothed length base on the base length; calculating real-time degree for each respiratory cycle base on the variation degree, sequence number of each respiratory cycle, and the smoothed length; and calculating respiratory rate base on the smoothed length and the real-time degree.Type: GrantFiled: May 19, 2014Date of Patent: May 2, 2017Assignee: SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD.Inventors: Zuming Yao, Lihan Liu, Yun Deng, Jilun Ye
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Publication number: 20140257125Abstract: This disclosure relates to methods and apparatus for detecting respiratory rate. The method for detecting respiratory rate may include: sampling respiratory waveform data in a time sequence; detecting respiratory cycles from the sampled respiratory waveform data; calculating variation degree for the sampled respiratory waveform data; calculating base length base on the variation degree; calculating smoothed length base on the base length; calculating real-time degree for each respiratory cycle base on the variation degree, sequence number of each respiratory cycle, and the smoothed length; and calculating respiratory rate base on the smoothed length and the real-time degree.Type: ApplicationFiled: May 19, 2014Publication date: September 11, 2014Inventors: Zuming Yao, Lihan Liu, Yun Deng, Jilun Ye