Patents by Inventor Zhenfeng Wang

Zhenfeng Wang 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).

  • Patent number: 11634146
    Abstract: The present disclosure relates to a method and system for integrated path planning and path tracking control of an autonomous vehicle. The method includes: obtaining five input control variables and eleven system state variables of an autonomous vehicle at current time; constructing a vehicle path planning-tracking integrated state model according to the obtained variables at the current time; enveloping external contours of two autonomous vehicles using elliptical envelope curves to determine elliptical vehicle envelope curves of the two autonomous vehicles, respectively; determining time to collision (TTC) between the vehicles according to elliptical vehicle envelope curves and vehicle driving states; establishing an objective function of a model prediction controller (MPC) according to the model; and solving the objective function based on the TTC, and determining input control variables to the MPC at the next time. Autonomous vehicle collision avoidance can be achieved according to the present disclosure.
    Type: Grant
    Filed: May 28, 2021
    Date of Patent: April 25, 2023
    Inventors: Yechen Qin, Yiwei Huang, Ehsan Hashemi, Amir Khajepour, Zhenfeng Wang
  • Publication number: 20220410910
    Abstract: The present disclosure relates to a method and system for integrated path planning and path tracking control of an autonomous vehicle. The method includes: obtaining five input control variables and eleven system state variables of an autonomous vehicle at current time; constructing a vehicle path planning-tracking integrated state model according to the obtained variables at the current time; enveloping external contours of two autonomous vehicles using elliptical envelope curves to determine elliptical vehicle envelope curves of the two autonomous vehicles, respectively; determining time to collision (TTC) between the vehicles according to elliptical vehicle envelope curves and vehicle driving states; establishing an objective function of a model prediction controller (MPC) according to the model; and solving the objective function based on the TTC, and determining input control variables to the MPC at the next time. Autonomous vehicle collision avoidance can be achieved according to the present disclosure.
    Type: Application
    Filed: May 28, 2021
    Publication date: December 29, 2022
    Applicant: Beijing Institute Of Technology
    Inventors: Yechen Qin, Yiwei Huang, Ehsan Hashemi, Amir Khajepour, Zhenfeng Wang
  • Publication number: 20150137015
    Abstract: A connector for being inserted into a first channel of a microfluidic device. The connector includes a first end and a second end, when seen in the direction of a longitudinal central axis of said connector, wherein the second end is arranged in a second end portion of the connector; an inner hollow space; a outer circumferential wall extending around said longitudinal central axis, such that said outer circumferential wall extends around said inner hollow space.
    Type: Application
    Filed: July 12, 2012
    Publication date: May 21, 2015
    Applicant: Agency for Science, Technology and Research
    Inventors: Guek Geok Alicia Toh, Zhenfeng Wang
  • Publication number: 20140346378
    Abstract: An improved microfluidic system with an improved microfluidic valve module is disclosed. The microfluidic system includes a microfluidic chip and one or more valve modules. The microfluidic chip has microfluidic channels and one or more cavities formed in the chip, each of the one or more cavities designed to receive one of the one or more valve modules. Each of the one or more valve modules includes a first layer, a control layer and one or more second layers. The first layer includes a deformable material. The control layer has a microfluidic control chamber formed in a portion of it. The control layer is also located adjoining the first layer and the deformable material of the first layer forms a deformable surface of the control chamber. The one or more second layers include an input microfluidic channel and an output microfluidic channel.
    Type: Application
    Filed: December 21, 2011
    Publication date: November 27, 2014
    Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
    Inventors: Chin Hock Kua, Zhenfeng Wang, Wei Fan, Cong Zhi Leon Chan, Zhiping Wang
  • Publication number: 20130240073
    Abstract: In an embodiment, a microfluidic device for altering a fluid flow may be provided. The microfluidic device may include a chamber having a first chamber portion with an inlet configured to receive a fluid flow into the chamber; a second chamber portion with an outlet configured to permit an altered fluid flow out of the chamber, the second chamber portion defining a smaller chamber cross section compared to the first chamber portion; and at least one support structure with at least one support surface defining a division between the first chamber portion and the second chamber portion; and a diaphragm in the first chamber portion, the diaphragm displaceable between a position at the inlet and a position at the at least one support surface by the fluid flow. A microfluidic system including the microfluidic device may also be provided.
    Type: Application
    Filed: September 17, 2010
    Publication date: September 19, 2013
    Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
    Inventors: Huanming Xia, Zhiping Wang, Wei Fan, Zhenfeng Wang
  • Patent number: 8299937
    Abstract: A self-powered in-pipe fluid meter to be mounted inside of a pipe carrying a fluid therein. The fluid meter comprises at least one sensing unit capable of measuring one or more parameters of the fluid inside of the pipe; a telemetric data transmission unit capable of telemetrically transmitting data including a measured fluid parameter to a host terminal and/or another fluid meter; and at least one fluid-driven power source unit capable of generating power from the fluid flow within the pipe and supplying power to the sensing unit and/or the transmission unit.
    Type: Grant
    Filed: August 6, 2007
    Date of Patent: October 30, 2012
    Assignee: Agency for Science, Technology and Research
    Inventors: Zhenfeng Wang, Ser Youn Lim, Wei Fan, Danhong Zhang
  • Publication number: 20120048884
    Abstract: An apparatus for dispensing a liquid, the apparatus comprising a chamber for containing the liquid and a gas therein; an outlet in fluid connection with the chamber for releasing the liquid from the apparatus; a pressure-sensitive barrier in the fluid connection between the outlet and the chamber for preventing release of the liquid from the chamber and for allowing passage of the liquid therethrough only when there is at least a critical pressure difference between pressure of the gas in the chamber and atmospheric pressure; and a compressing element for compressing the gas to a raised pressure upon a one-time activation of the compressing element, wherein difference between the raised pressure and atmospheric pressure is at least the same as the critical pressure difference.
    Type: Application
    Filed: April 27, 2009
    Publication date: March 1, 2012
    Inventors: Zhenfeng Wang, Huan Ming Xia
  • Publication number: 20100314041
    Abstract: A method of making a substrate includes providing an upper insulative layer and a lower insulative layer, wherein the upper insulative layer includes an inlet opening, the lower insulative layer includes a channel, and the inlet opening is in fluid communication with the channel, flowing a non-solidified material through the inlet opening into the channel, and then solidifying the non-solidified material by applying energy to the non-solidified material, thereby forming embedded metallization in the channel. The substrate can be a microfluidic device, an electrical interconnect or other electronic devices.
    Type: Application
    Filed: February 16, 2009
    Publication date: December 16, 2010
    Applicant: Agency for Science, Technology and Research
    Inventors: Sum Huan Ng, Zhenfeng Wang
  • Publication number: 20100085211
    Abstract: A self-powered in-pipe fluid meter to be mounted inside of a pipe carrying a fluid therein. The fluid meter comprises at least one sensing unit capable of measuring one or more parameters of the fluid inside of the pipe; a telemetric data transmission unit capable of telemetrically transmitting data including a measured fluid parameter to a host terminal and/or another fluid meter; and at least one fluid-driven power source unit capable of generating power from the fluid flow within the pipe and supplying power to the sensing unit and/or the transmission unit.
    Type: Application
    Filed: August 6, 2007
    Publication date: April 8, 2010
    Applicant: Agency for Science, Technology and Research
    Inventors: Zhenfeng Wang, Ser Yong Lim, Wei Fan, Danhong Zhang
  • Patent number: D939601
    Type: Grant
    Filed: April 13, 2021
    Date of Patent: December 28, 2021
    Inventor: Zhenfeng Wang