Patents by Inventor Pengfei Qi
Pengfei Qi 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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Publication number: 20240159904Abstract: The present invention discloses a light detection and ranging (LIDAR) system ranging method, including: circularly allocating, by a light routing device, each periodic signal of a transmit signal to each light channel in a chronological order, monitoring a beat signal or a returned light pulse signal in each light channel, and calculating a target distance according to a frequency of the beat signal or a return delay time of the light pulse signal. The present invention further discloses a LIDAR, including: a laser source, a light routing device, an optical scanning system, a light detector, and a data processing module. A quantity of detection points per second of each beam is increased to N times, where N is a quantity of channels of the light routing device, so as to improve the detection efficiency and reduce the requirement on transmit resources; and a scanning mode and an angular resolution can be dynamically controlled according to needs.Type: ApplicationFiled: December 27, 2022Publication date: May 16, 2024Inventors: Su Li, Fan Qi, Pengfei Cai, Yongpeng Zhao
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Publication number: 20240151831Abstract: The present invention provides a dual-polarized Lidar receiving end based on an optical chip, including a module for receiving reflected light, a module for receiving local oscillator light, a plurality of frequency mixers, a plurality of detectors and a plurality of variable optical attenuators. The Lidar receiving end according to the present invention can receive and process two optical signals in an orthogonal polarization state. Compared with the existing Lidar design solution, a system on chip based on the optical chip according to the present invention implements monolithic integration of massive devices, and has the advantages of high stability, small volume and low weight and costs, and the like. It is relatively easy to increase a quantity of channels at the receiving end designed according to the present invention.Type: ApplicationFiled: November 8, 2022Publication date: May 9, 2024Inventors: Fan Qi, Pengfei Cai
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Patent number: 11959383Abstract: A method for carrying out grouting between adjacent gateroads in internal-staggered split-level coal mining. A return air gateroad of a stoping face and an inlet air gateroad of a heading face are not on the same level. The return air gateroad of the stoping face is arranged along a roof of a coal seam. The inlet air gateroad of the heading face is arranged along a floor of the coal seam. There is a height difference between the return air gateroad and the inlet air gateroad in a vertical direction. During the construction process, the inlet air gateroad is excavated at a delay distance of 180-200 meters from the return air gateroad. The drilling and grouting are performed while excavating the roadway, where grouting holes are arranged in a single row. A device for implementing the method is also provided.Type: GrantFiled: May 24, 2022Date of Patent: April 16, 2024Assignee: Taiyuan University of TechnologyInventors: Guorui Feng, Yijiang Fan, Pengfei Wang, Chenliang Hao, Xiaoze Wen, Jun Guo, Jinwen Bai, Tingye Qi, Jianan Liu, Linjun Zhu, Changquan Wu
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Publication number: 20220368273Abstract: Disclosed is a BIPV module, comprising a stack of a front light-transmitting plate, a power generation layer set, a bus wiring layer and a rear light-transmitting plate, wherein one of the rear light-transmitting plate and the front light-transmitting plate is provided with a pattern layer coated with color glaze at a side thereof close to the other one of the front light-transmitting plate and the rear light-transmitting plate, the bus wiring layer is attached onto the power generation layer set to form a pin, and the power generation layer set and the bus wiring layer are encapsulated between the front and rear light-transmitting plates by an encapsulation adhesive.Type: ApplicationFiled: August 1, 2019Publication date: November 17, 2022Inventors: Xiaohui YU., Pengfei QI, Shiqiang CHEN, Gaiyu NIU, Huayi HU, Zhilin PAN
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Patent number: 9129807Abstract: A method for synthesis of silicon nanowires provides a growth reactor having a decomposition zone and a deposition zone. A precursor gas introduced into the decomposition zone is disassociated to form an activated species that reacts with catalyst materials located in the deposition zone to deposit nano-structured materials on a low melting point temperature substrate in the deposition zone. A decomposition temperature in the decomposition zone is greater than a melting point temperature of the low melting point temperature substrate. The silicon nanowire are grown directly on the low melting point temperature substrate in the deposition zone to prevent the higher temperatures in the decomposition zone from damaging the molecular structure and/or integrity of the lower melting point temperature substrate located in the deposition zone.Type: GrantFiled: November 15, 2013Date of Patent: September 8, 2015Assignee: Palo Alto Research Center IncorporatedInventors: Pengfei Qi, William S. Wong
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Patent number: 8956978Abstract: Nanotube devices and approaches therefore involve the formation and/or implementation of substantially semiconducting single-walled nanotubes. According to an example embodiment of the present invention, substantially semiconducting single-walled nanotubes couple circuit nodes in an electrical device. In some applications, semiconducting and metallic nanotubes having a diameter in a threshold range are exposed to an etch gas that selectively etches the metallic nanotubes, leaving substantially semiconducting nanotubes coupling the circuit nodes.Type: GrantFiled: July 30, 2007Date of Patent: February 17, 2015Assignee: The Board of Trustees of the Leland Stanford Junior UniverityInventors: Hongjie Dai, Guangyu Zhang, Pengfei Qi
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Publication number: 20140073117Abstract: A method for synthesis of silicon nanowires provides a growth reactor having a decomposition zone and a deposition zone. A precursor gas introduced into the decomposition zone is disassociated to form an activated species that reacts with catalyst materials located in the deposition zone to deposit nano-structured materials on a low melting point temperature substrate in the deposition zone. A decomposition temperature in the decomposition zone is greater than a melting point temperature of the low melting point temperature substrate. The silicon nanowire are grown directly on the low melting point temperature substrate in the deposition zone to prevent the higher temperatures in the decomposition zone from damaging the molecular structure and/or integrity of the lower melting point temperature substrate located in the deposition zone.Type: ApplicationFiled: November 15, 2013Publication date: March 13, 2014Applicant: PALO ALTO RESEARCH CENTER INCORPORATEDInventors: Pengfei QI, William S. WONG
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Patent number: 8603246Abstract: A method for synthesis of silicon nanowires provides a growth reactor having a decomposition zone and a deposition zone. A precursor gas introduced into the decomposition zone is disassociated to form an activated species that reacts with catalyst materials located in the deposition zone to deposit nano-structured materials on a low melting point temperature substrate in the deposition zone. A decomposition temperature in the decomposition zone is greater than a melting point temperature of the low melting point temperature substrate. The silicon nanowire are grown directly on the low melting point temperature substrate in the deposition zone to prevent the higher temperatures in the decomposition zone from damaging the molecular structure and/or integrity of the lower melting point temperature substrate located in the deposition zone.Type: GrantFiled: January 30, 2008Date of Patent: December 10, 2013Assignee: Palo Alto Research Center IncorporatedInventors: Pengfei Qi, William S Wong
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Publication number: 20130298830Abstract: A method for synthesis of silicon nanowires provides a growth reactor having a decomposition zone and a deposition zone. A precursor gas introduced into the decomposition zone is disassociated to form an activated species that reacts with catalyst materials located in the deposition zone to deposit nano-structured materials on a low melting point temperature substrate in the deposition zone. A decomposition temperature in the decomposition zone is greater than a melting point temperature of the low melting point temperature substrate. The silicon nanowire are grown directly on the low melting point temperature substrate in the deposition zone to prevent the higher temperatures in the decomposition zone from damaging the molecular structure and/or integrity of the lower melting point temperature substrate located in the deposition zone.Type: ApplicationFiled: January 30, 2008Publication date: November 14, 2013Applicant: PALO ALTO RESEARCH CENTER, INCORPORATEDInventors: Pengfei QI, William S. WONG
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Patent number: 8059975Abstract: A system of diagnosing a printer or photocopying system using a flexible diagnostic sheet is described. In the system, a thin diagnostic sheet including a plurality of sensors formed on the sheet is run through the paper path of the printing system. The printing system subjects the diagnostic sheet to the printing process, including the deposition of fuser oil and toner on the sheet. Sensors on the sheet record various parameters, including but not limited to the amount of fuser oil deposited and the charge on various toner particles. The information is transmitted to service personnel or the printer end user to enable timely repair of the printer.Type: GrantFiled: December 18, 2008Date of Patent: November 15, 2011Assignee: Palo Alto Research Center IncorporatedInventors: Michael L Chabinyc, Tse Nga Ng, William S Wong, Ashish Pattekar, John E Northrup, Pengfei Qi
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Patent number: 8000613Abstract: A system, including an improved sensor, for determining toner particle uniformity is described. The sensor measures toner particle charge, typically be having the charge on the toner particle control a current flow through the channel of a thin film transistor. By measuring the charge on many toner particles, the system determines whether sufficient toner degradation has occurred that the toner should be replaced. The sensor is particularly suitable for being formed on a thin diagnostic sheet that is input through the paper path of a printing system.Type: GrantFiled: December 18, 2008Date of Patent: August 16, 2011Assignee: Palo Alto Research Center IncorporatedInventors: William S Wong, Michael L Chabinyc, Sanjiv Sambandan, Pengfei Qi
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Publication number: 20110167526Abstract: A stress-engineered microspring is formed generally in the plane of a substrate. A nanowire (or equivalently, a nanotube) is formed at the tip thereof, also in the plane of the substrate. Once formed, the length of the nanowire may be defined, for example photolithographically. A sacrificial layer underlying the microspring may then be removed, allowing the engineered stresses in the microspring to cause the structure to bend out of plane, elevating the nanowire off the substrate and out of plane. Use of the nanowire as a contact is thereby provided. The nanowire may be clamped at the tip of the microspring for added robustness. The nanowire may be coated during the formation process to provide additional functionality of the final device.Type: ApplicationFiled: March 10, 2011Publication date: July 7, 2011Applicant: PALO ALTO RESEARCH CENTER INCORPORATEDInventors: Eugene Chow, Pengfei Qi
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Publication number: 20110163061Abstract: A stress-engineered microspring is formed generally in the plane of a substrate. A nanowire (or equivalently, a nanotube) is formed at the tip thereof, also in the plane of the substrate. Once formed, the length of the nanowire may be defined, for example photolithographically. A sacrificial layer underlying the microspring may then be removed, allowing the engineered stresses in the microspring to cause the structure to bend out of plane, elevating the nanowire off the substrate and out of plane. Use of the nanowire as a contact is thereby provided. The nanowire may be clamped at the tip of the microspring for added robustness. The nanowire may be coated during the formation process to provide additional functionality of the final device.Type: ApplicationFiled: March 10, 2011Publication date: July 7, 2011Applicant: PALO ALTO RESEARCH CENTER INCORPORATEDInventors: Eugene Chow, Pengfei Qi
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Publication number: 20110089402Abstract: One aspect of the invention involves an article of manufacture that includes a dielectric layer with an array of pores, and an array of nanowires at least partially contained within the array of pores. A respective nanowire in the array of nanowires is formed within a respective pore in the array of pores. Nanowires in the array of nanowires include a core semiconducting region with a first type of, a shell semiconducting region with a second type of doping, and a junction region between the core semiconducting region and the shell semiconducting. Additionally, the article of manufacture includes a first conducting layer electrically coupled to a plurality of shell semiconducting regions for a plurality of nanowires in the array of nanowires, as well as a second conducting layer electrically coupled to a plurality of core semiconducting regions for a plurality of nanowires in the array of nanowires.Type: ApplicationFiled: April 9, 2010Publication date: April 21, 2011Inventor: Pengfei Qi
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Patent number: 7927905Abstract: A stress-engineered microspring is formed generally in the plane of a substrate. A nanowire (or equivalently, a nanotube) is formed at the tip thereof, also in the plane of the substrate. Once formed, the length of the nanowire may be defined, for example photolithographically. A sacrificial layer underlying the microspring may then be removed, allowing the engineered stresses in the microspring to cause the structure to bend out of plane, elevating the nanowire off the substrate and out of plane. Use of the nanowire as a contact is thereby provided. The nanowire may be clamped at the tip of the microspring for added robustness. The nanowire may be coated during the formation process to provide additional functionality of the final device.Type: GrantFiled: December 21, 2007Date of Patent: April 19, 2011Assignee: Palo Alto Research Center IncorporatedInventors: Eugene Michael Chow, Pengfei Qi
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Publication number: 20100158544Abstract: A system of diagnosing a printer or photocopying system using a flexible diagnostic sheet is described. In the system, a thin diagnostic sheet including a plurality of sensors formed on the sheet is run through the paper path of the printing system. The printing system subjects the diagnostic sheet to the printing process, including the deposition of fuser oil and toner on the sheet. Sensors on the sheet record various parameters, including but not limited to the amount of fuser oil deposited and the charge on various toner particles. The information is transmitted to service personnel or the printer end user to enable timely repair of the printer.Type: ApplicationFiled: December 18, 2008Publication date: June 24, 2010Applicant: Palo Alto Research Center IncorporatedInventors: Michael L. Chabinyc, Tse Nga Ng, William S. Wong, Ashish Pattekar, John E. Northrup, Pengfei Qi
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Publication number: 20100158548Abstract: A system, including an improved sensor, for determining toner particle uniformity is described. The sensor measures toner particle charge, typically be having the charge on the toner particle control a current flow through the channel of a thin film transistor. By measuring the charge on many toner particles, the system determines whether sufficient toner degradation has occurred that the toner should be replaced. The sensor is particularly suitable for being formed on a thin diagnostic sheet that is input through the paper path of a printing system.Type: ApplicationFiled: December 18, 2008Publication date: June 24, 2010Applicant: Palo Alto Research Center IncorporatedInventors: William S. Wong, Michael L. Chabinyc, Sanjiv Sambandan, Pengfei Qi
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Publication number: 20090200539Abstract: Composite nanorod-based structures for generating electricity are disclosed. One embodiment is an article of manufacture that includes a first layer with an array of nanowires and a dielectric material. The nanowires include: a core semiconducting region with a first type of doping; a shell semiconducting region with a second type of doping; and a junction region between the core semiconducting region and the shell semiconducting region. The first type of doping is different from the second type of doping. The shell region length is less than the core region length. The shell semiconducting region surrounds a portion of the core semiconducting region over a length of the core semiconducting region corresponding to the junction region length. A second layer comprising a conducting material contacts the top surface of the first layer. A third layer comprising a conducting material contacts the bottom surface of the first layer.Type: ApplicationFiled: February 9, 2009Publication date: August 13, 2009Inventor: Pengfei Qi
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Publication number: 20090159996Abstract: A stress-engineered microspring is formed generally in the plane of a substrate. A nanowire (or equivalently, a nanotube) is formed at the tip thereof, also in the plane of the substrate. Once formed, the length of the nanowire may be defined, for example photolithographically. A sacrificial layer underlying the microspring may then be removed, allowing the engineered stresses in the microspring to cause the structure to bend out of plane, elevating the nanowire off the substrate and out of plane. Use of the nanowire as a contact is thereby provided. The nanowire may be clamped at the tip of the microspring for added robustness. The nanowire may be coated during the formation process to provide additional functionality of the final device.Type: ApplicationFiled: December 21, 2007Publication date: June 25, 2009Applicant: PALO ALTO RESEARCH CENTER INCORPORATEDInventors: Eugene Chow, Pengfei Qi