Patents by Inventor QINGDONG MENG
QINGDONG MENG 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: 11420602Abstract: A rail train brake control system, comprising: a single vehicle brake control unit, a train brake control unit, a traction control unit and a communication control unit; the single vehicle brake control unit is provided in each vehicle of the rail train, the train brake control unit and the communication control unit are provided in the vehicles at both ends of the rail train, and the traction control unit is disposed in motor vehicles of a plurality of vehicles; and the single vehicle brake control unit, the train brake control unit, the traction control unit and the communication control unit implement communication by means of the gateway. The system can realize flexible marshalling of a train. Further disclosed is a train comprising the train brake control system.Type: GrantFiled: June 29, 2018Date of Patent: August 23, 2022Assignee: CRRC TANGSHAN CO., LTD.Inventors: Zhonghua Liu, Lei Chen, Chunjie Xie, Hongmei Xu, Bo Zhou, Keyu Cao, Peilei Fang, Qingdong Meng, Zhenshan Ji, Shan Gao, Liyun Shao
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Patent number: 10914824Abstract: A lidar system can be used to measure a distance to one or more objects in a target region, such as by transmitting light towards the target and then receiving light reflected or scattered from the target. Received light can be stored as charge on storage elements such as capacitors, where received light can be stored on different storage elements depending on a time of arrival of the received light. A reduction in the number of storage elements can be achieved by providing one or more groups of storage elements, where each group of storage elements can correspond to a digit of a time of flight, where the time of flight can be round trip travel time of a light beam travelling from the lidar system to the target region and then back to the lidar system. Each group of storage elements can be arranged in a binary tree of a decimal tree configuration.Type: GrantFiled: November 21, 2017Date of Patent: February 9, 2021Assignee: Analog Devices International Unlimited CompanyInventors: Libo Meng, Qingdong Meng, Wei Wang
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Publication number: 20200156604Abstract: A rail train brake control system, comprising: a single vehicle brake control unit, a train brake control unit, a traction control unit and a communication control unit; the single vehicle brake control unit is provided in each vehicle of the rail train, the train brake control unit and the communication control unit are provided in the vehicles at both ends of the rail train, and the traction control unit is disposed in motor vehicles of a plurality of vehicles; and the single vehicle brake control unit, the train brake control unit, the traction control unit and the communication control unit implement communication by means of the gateway. The system can realize flexible marshalling of a train. Further disclosed is a train comprising the train brake control system.Type: ApplicationFiled: June 29, 2018Publication date: May 21, 2020Applicant: CRRC TANGSHAN CO., LTD.Inventors: Zhonghua LIU, Lei CHEN, Chunjie XIE, Hongmei XU, Bo ZHOU, Keyu CAO, Peilei FANG, Qingdong MENG, Zhenshan JI, Shan GAO, Liyun SHAO
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Publication number: 20190154812Abstract: A lidar system can be used to measure a distance to one or more objects in a target region, such as by transmitting light towards the target and then receiving light reflected or scattered from the target. Received light can be stored as charge on storage elements such as capacitors, where received light can be stored on different storage elements depending on a time of arrival of the received light. A reduction in the number of storage elements can be achieved by providing one or more groups of storage elements, where each group of storage elements can correspond to a digit of a time of flight, where the time of flight can be round trip travel time of a light beam travelling from the lidar system to the target region and then back to the lidar system. Each group of storage elements can be arranged in a binary tree of a decimal tree configuration.Type: ApplicationFiled: November 21, 2017Publication date: May 23, 2019Inventors: Libo Meng, Qingdong Meng, Wei Wang
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Patent number: 9768793Abstract: For continuous-time multi-stage noise shaping analog-to-digital converters (CT MASH ADCs), quantization noise cancellation often requires accurate estimation of transfer functions, e.g., a noise transfer function of the front end modulator and a signal transfer function of the back end modulator. To provide quantization noise cancellation, digital quantization noise cancellation filters adaptively tracks transfer function variations due to integrator gain errors, flash-to-DAC timing errors, as well as the inter-stage gain and timing errors. Tracking the transfer functions is performed through the direct cross-correlation between the injected maximum length linear feedback shift registers (LFSR) sequence and modulator outputs and then corrects these non-ideal effects by accurately modeling the transfer functions with programmable finite impulse response (PFIR) filters.Type: GrantFiled: November 30, 2016Date of Patent: September 19, 2017Assignee: ANALOG DEVICES GLOBALInventors: Qingdong Meng, Hajime Shibata, Richard E. Schreier, Martin Steven McCormick, Yunzhi Dong, Jose Barreiro Silva, Jialin Zhao, Donald W. Paterson, Wenhua W. Yang
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Patent number: 9735797Abstract: For analog-to-digital converters (ADCs) which utilize a feedback digital-to-analog converter (DAC) for conversion, the final analog output can be affected or distorted by errors of the feedback DAC. A digital measurement technique can be implemented to determine timing mismatch error for the feedback DAC in a continuous-time delta-sigma modulator (CTDSM) or in a continuous-time pipeline modulator. The methodology utilizes cross-correlation of each DAC unit elements (UEs) output to the entire modulator output to measure its timing mismatch error respectively. Specifically, the timing mismatch error is estimated using a ratio based on a peak value and a value for the next tap in the cross-correlation function. The obtained errors can be stored in a look-up table and fully corrected in digital domain or analog domain.Type: GrantFiled: November 23, 2016Date of Patent: August 15, 2017Assignee: ANALOG DEVICES, INC.Inventors: Jialin Zhao, Qingdong Meng, Yunzhi Dong, Jose Barreiro Silva
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Publication number: 20170179969Abstract: For continuous-time multi-stage noise shaping analog-to-digital converters (CT MASH ADCs), quantization noise cancellation often requires accurate estimation of transfer functions, e.g., a noise transfer function of the front end modulator and a signal transfer function of the back end modulator. To provide quantization noise cancellation, digital quantization noise cancellation filters adaptively tracks transfer function variations due to integrator gain errors, flash-to-DAC timing errors, as well as the inter-stage gain and timing errors. Tracking the transfer functions is performed through the direct cross-correlation between the injected maximum length linear feedback shift registers (LFSR) sequence and modulator outputs and then corrects these non-ideal effects by accurately modeling the transfer functions with programmable finite impulse response (PFIR) filters.Type: ApplicationFiled: November 30, 2016Publication date: June 22, 2017Applicant: ANALOG DEVICES GLOBALInventors: Qingdong Meng, Hajime Shibata, Richard E. Schreier, Martin Steven McCormick, Yunzhi Dong, Jose Barreiro Silva, Jialin Zhao, Donald W. Paterson, Wenhua W. Yang
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Publication number: 20170170839Abstract: For analog-to-digital converters (ADCs) which utilize a feedback digital-to-analog converter (DAC) for conversion, the final analog output can be affected or distorted by errors of the feedback DAC. A digital measurement technique can be implemented to determine timing mismatch error for the feedback DAC in a continuous-time delta-sigma modulator (CTDSM) or in a continuous-time pipeline modulator. The methodology utilizes cross-correlation of each DAC unit elements (UEs) output to the entire modulator output to measure its timing mismatch error respectively. Specifically, the timing mismatch error is estimated using a ratio based on a peak value and a value for the next tap in the cross-correlation function. The obtained errors can be stored in a look-up table and fully corrected in digital domain or analog domain.Type: ApplicationFiled: November 23, 2016Publication date: June 15, 2017Applicant: ANALOG DEVICES, INC.Inventors: Jialin Zhao, Qingdong Meng, Yunzhi Dong, Jose Barreiro Silva
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Patent number: 9595982Abstract: An approach to linearization relaxes the requirements on the digitization of the analog output signal while maintaining the benefits of a high sampling rate of the output signal. The digitization approach extracts sufficient information to characterize the output signal over a wide bandwidth without necessarily determining sufficient information to fully represent the output signal, for example, without sampling the output signal at the Nyquist sampling rate with a sufficient precision to accurately represent the signal.Type: GrantFiled: May 20, 2014Date of Patent: March 14, 2017Assignee: ANALOG DEVICES, INC.Inventors: Theophane Weber, Martin Steven McCormick, Qingdong Meng
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Publication number: 20160094253Abstract: An approach to linearization relaxes the requirements on the digitization of the analog output signal while maintaining the benefits of a high sampling rate of the output signal. The digitization approach extracts sufficient information to characterize the output signal over a wide bandwidth without necessarily determining sufficient information to fully represent the output signal, for example, without sampling the output signal at the Nyquist sampling rate with a sufficient precision to accurately represent the signal.Type: ApplicationFiled: May 20, 2014Publication date: March 31, 2016Applicant: ANALOG DEVICES, INC.Inventors: THEOPHANE WEBER, MARTIN STEVEN McCORMICK, QINGDONG MENG