Patents by Inventor Jianping Cheng
Jianping Cheng 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: 11881821Abstract: This disclosure relates to a signal generating circuit and an audio processing device. The circuit includes a switch module, a voltage producing module, and a signal generating module; the switch module is connected to the voltage producing module, including at least one control switch, and is used for receiving a frequency division signal. Based on the frequency division signal, the at least one control switch is turned on or turned off; the voltage producing module is separately connected to the switch module and the signal generating module and used for producing a first voltage and a second voltage. The at least one control switch controls the first voltage and the second voltage to change. The signal generating module is connected to the voltage producing module and used for generating a carrier signal with the same frequency as the frequency division signal according to the received first and second voltages.Type: GrantFiled: April 28, 2019Date of Patent: January 23, 2024Assignee: SPREADTRUM COMMUNICATIONS (SHENZHEN) CO., LTD.Inventors: Junliang Shi, Jianping Cheng, Mengzhang Li, Wenxian Lu
-
Publication number: 20230241800Abstract: An edge-casting process for sheet materials according to the present invention includes the following steps: S1. grooving, that is to choose a suitable sheet material, and leave a processing margin on the peripheral edge of the sheet, material, so as to make a first groove; S2. casting or covering, that is to cast a high solid content coating material into said first groove and solidify it; S3. making a second groove on the back of said first groove of the sheet material, and casting a high solid content coating material into said second groove and solidify it; and S4. milling and chamfering, that is to chamfer the sheet material according to a required processing margin, then perform an edge-casting process.Type: ApplicationFiled: June 15, 2021Publication date: August 3, 2023Inventor: Jianping CHENG
-
Patent number: 11619599Abstract: The present disclosure provides a substance identification device and a substance identification method. The substance identification device comprises: a classifier establishing unit configured to establish a classifier based on scattering density values reconstructed for a plurality of known sample materials, wherein the classifier comprises a plurality of feature regions corresponding to a plurality of characteristic parameters for the plurality of known sample materials, respectively; and an identification unit for a material to be tested, configured to match the characteristic parameter of the material to be tested with the classifier, and to identify a type of the material to be tested by obtaining a feature region corresponding to the characteristic parameter of the material to be tested.Type: GrantFiled: July 22, 2020Date of Patent: April 4, 2023Assignees: Tsinghua University, Nuctech Company LimitedInventors: Zhi Zeng, Xingyu Pan, Xuewu Wang, Junli Li, Ming Zeng, Jianmin Li, Ziran Zhao, Jianping Cheng, Hao Ma, Hui Zhang, Hao Yu, Bicheng Liu
-
Publication number: 20220200549Abstract: This disclosure relates to a signal generating circuit and an audio processing device. The circuit includes a switch module, a voltage producing module, and a signal generating module; the switch module is connected to the voltage producing module, including at least one control switch, and is used for receiving a frequency division signal. Based on the frequency division signal, the at least one control switch is turned on or turned off; the voltage producing module is separately connected to the switch module and the signal generating module and used for producing a first voltage and a second voltage. The at least one control switch controls the first voltage and the second voltage to change. The signal generating module is connected to the voltage producing module and used for generating a carrier signal with the same frequency as the frequency division signal according to the received first and second voltages.Type: ApplicationFiled: April 28, 2019Publication date: June 23, 2022Inventors: Junliang SHI, Jianping CHENG, Mengzhang LI, Wenxian LU
-
Publication number: 20210025836Abstract: The present disclosure provides a substance identification device and a substance identification method. The substance identification device comprises: a classifier establishing unit configured to establish a classifier based on scattering density values reconstructed for a plurality of known sample materials, wherein the classifier comprises a plurality of feature regions corresponding to a plurality of characteristic parameters for the plurality of known sample materials, respectively; and an identification unit for a material to be tested, configured to match the characteristic parameter of the material to be tested with the classifier, and to identify a type of the material to be tested by obtaining a feature region corresponding to the characteristic parameter of the material to be tested.Type: ApplicationFiled: July 22, 2020Publication date: January 28, 2021Inventors: Zhi ZENG, Xingyu PAN, Xuewu WANG, Junli LI, Ming ZENG, Jianmin LI, Ziran ZHAO, Jianping CHENG, Hao MA, Hui ZHANG, Hao YU, Bicheng LIU
-
Patent number: 10620336Abstract: The present disclosure relates to a method, a device and a system for inspecting a moving object based on cosmic rays, pertaining to the field of radiation imaging and safety inspection techniques. The method includes: detecting whether a speed of the inspected moving object is within a preset range; recording a motion trajectory of the moving object with a monitoring device; acquiring information about charged particles in the cosmic rays with a position sensitive detector, the information about charged particles including track information of the charged particles; determining the moving object by matching positions of the motion trajectory and the track information; reconstructing the track of the charged particles according to the information about the charged particles; and recognizing the material inside the moving object based on the track reconstruction.Type: GrantFiled: January 20, 2017Date of Patent: April 14, 2020Assignees: TSINGHUA UNIVERSITY, NUCTECH COMPANY LIMITEDInventors: Kejun Kang, Jianping Cheng, Zhiqiang Chen, Ziran Zhao, Junli Li, Xuewu Wang, Zhi Zeng, Qingjun Zhang, Jianping Gu, Xi Yi, Bicheng Liu, Guangming Xu, Yongqiang Wang
-
Publication number: 20180156741Abstract: Inspection devices and inspection methods are disclosed. The inspection method includes: performing X-ray scanning on an object being inspected so as to generate an image of the object being inspected; dividing the image of the object being inspected to determine at least one region of interest; detecting interaction between a cosmic ray and the region of interest to obtain a detection value; calculating a scattering characteristic value and/or an absorption characteristic value of the cosmic ray in the region of interest based on size information of the region of interest and the detection value; and discriminating a material attribute of the region of interest by means of the scattering characteristic value and/or the absorption characteristic value. With the above technical solutions, inspection accuracy and inspection efficiency may be improved.Type: ApplicationFiled: September 27, 2017Publication date: June 7, 2018Inventors: Kejun Kang, Jianping Cheng, Zhiqiang Chen, Ziran Zhao, Junli Li, Xuewu Wang, Zhi Zeng, Ming Zeng, Yi Wang, Qingjun Zhang, Jianping Gu, Xi Yi, Bicheng Liu, Guangming Xu, Yongqiang Wang
-
Publication number: 20170329039Abstract: The present disclosure relates to a method, a device and a system for inspecting a moving object based on cosmic rays, pertaining to the field of radiation imaging and safety inspection techniques. The method includes: detecting whether a speed of the inspected moving object is within a preset range; recording a motion trajectory of the moving object with a monitoring device; acquiring information about charged particles in the cosmic rays with a position sensitive detector, the information about charged particles including track information of the charged particles; determining the moving object by matching positions of the motion trajectory and the track information; reconstructing the track of the charged particles according to the information about the charged particles; and recognizing the material inside the moving object based on the track reconstruction.Type: ApplicationFiled: January 20, 2017Publication date: November 16, 2017Inventors: Kejun KANG, Jianping CHENG, Zhiqiang CHEN, Ziran ZHAO, Junli LI, Xuewu WANG, Zhi ZENG, Qingjun ZHANG, Jianping GU, Xi YI, Bicheng LIU, Guangming XU, Yongqiang WANG
-
Patent number: 9491842Abstract: The present disclosure discloses a method for controlling a standing wave accelerator and a system thereof. The method comprises: generating, by an electron gun, an electron beam; injecting the electron beam into an accelerating tube; and controlling a microwave power source to generate and input microwave with different frequencies into the accelerating tube, so that the accelerating tube switches between different resonant modes at a predetermined frequency to generate electron beams with corresponding energy. According to the above solution, it only needs to change the output frequency of the microwave power source in the process of adjusting energy, without making any change to the accelerating structure per se. Therefore, the method is easy to operate. In addition, the structure of the accelerating tube in the above system is simple, without adding a particular regulation apparatus.Type: GrantFiled: September 16, 2014Date of Patent: November 8, 2016Assignees: Nuctech Company Limited, Tsinghua UniversityInventors: Huaibi Chen, Jianping Cheng, Shuxin Zheng, Jiaru Shi, Chuanxiang Tang, Qingxiu Jin, Wenhui Huang, Yuzheng Lin, Dechun Tong, Shi Wang
-
Publication number: 20150084549Abstract: The present disclosure discloses a method for controlling a standing wave accelerator and a system thereof. The method comprises: generating, by an electron gun, an electron beam; injecting the electron beam into an accelerating tube; and controlling a microwave power source to generate and input microwave with different frequencies into the accelerating tube, so that the accelerating tube switches between different resonant modes at a predetermined frequency to generate electron beams with corresponding energy. According to the above solution, it only needs to change the output frequency of the microwave power source in the process of adjusting energy, without making any change to the accelerating structure per se. Therefore, the method is easy to operate. In addition, the structure of the accelerating tube in the above system is simple, without adding a particular regulation apparatus.Type: ApplicationFiled: September 16, 2014Publication date: March 26, 2015Inventors: Huaibi CHEN, Jianping CHENG, Shuxin ZHENG, Jiaru SHI, Chuanxiang TANG, Qingxiu JIN, Wenhui HUANG, Yuzheng LIN, Dechun TONG, Shi WANG
-
Patent number: 8989344Abstract: A system and a method for measuring an ash content and a calorific value of a coal are provided. The system comprises: an X ray device, disposed over the coal and configured to emit an X ray to the coal; at least one X ray measuring device, disposed over the coal and configured to measure an energy spectrum of an X ray reflected by the coal; a distance sensor, disposed over the coal and configured to measure a distance between the coal and the at least one X ray measuring device; and a computing device, configured to receive the energy spectrum and the distance from the at least one X ray measuring device and the distance sensor and to compute the ash content and the calorific value of the coal according to the energy spectrum and the distance.Type: GrantFiled: December 20, 2012Date of Patent: March 24, 2015Assignee: Tsinghua UniversityInventors: Hongchang Yi, Qian Lin, Jianping Cheng
-
Patent number: 8913707Abstract: A photoneutron conversion target for generating photoneutrons by directing an x-ray beam at the photoneutron conversion target includes an elongated body having a first end and a second end. When the photoneutron conversion target is in use, the x-ray beam enters the body and propagates in a direction from the first end to the second end. The body of the photoneutron conversion target is shaped such that propagation of the x-ray beam is substantially proportionate to an intensity distribution of the x-ray beam, so that the greater an intensity of x-rays of the x-ray beam, the greater the propagation distance of the x-rays within the body of the photoneutron conversion target. The photoneutron conversion target according to the invention can make full use of the x-ray beam so as to increase a yield of photoneutrons.Type: GrantFiled: June 19, 2008Date of Patent: December 16, 2014Assignees: Tsinghua University, Nuctech Company LimitedInventors: Kejun Kang, Haifeng Hu, Yigang Yang, Zhiqiang Chen, Qitian Miao, Jianping Cheng, Yuanjing Li, Yinong Liu, Hua Peng, Tiezhu Li, Ziran Zhao, Yaohong Liu, Wanlong Wu
-
Patent number: 8396189Abstract: A photoneutron-x ray source includes a photoneutron conversion target, which outputs both photoneutrons and x-rays simultaneously. The photoneutron-x ray source includes an x-ray generator for generating an x-ray main beam that is applied to the photoneutron conversion target. The photoneutron conversion target generates photoneutrons upon the application of the x-ray main beam to the photoneutron conversion target. The photoneutron conversion target has a body that defines a passageway extending through the body and that is structured such that a first x-ray beam of the x-ray main beam can pass through the passageway without any reaction with the body, while a second x-ray beam of the x-ray main beam can enter the body and react with the body to emit the photoneutrons.Type: GrantFiled: June 19, 2008Date of Patent: March 12, 2013Assignees: Tsinghua University, Nuctech Company LimitedInventors: Kejun Kang, Haifeng Hu, Yigang Yang, Zhiqiang Chen, Qitian Miao, Jianping Cheng, Yuanjing Li, Yinong Liu, Hua Peng, Tiezhu Li, Ziran Zhao, Yaohong Liu, Wanlong Wu
-
Patent number: 8374310Abstract: A method and a system for contraband detection in an object using photoneutrons and x-rays includes an x-ray generator that generates an x-ray main beam including a first x-ray beam and a second x-ray beam, the first x-ray beam being directed to pass through the object. A photoneutron conversion target is arranged to receive the second x-ray beam so as to generate photoneutrons, the photoneutrons being directed to enter the object and react with the object to emit characteristic ?-rays. An x-ray detecting arrangement is arranged to receive the first x-ray beam that has passed through the object in order to perform x-ray imaging detection of the detected object. A ?-ray detecting arrangement is arranged to receive the characteristic ?-rays in order to perform neutron detection of the object based on the characteristic ?-rays. The x-ray imaging detection and the neutron detection are simultaneously performed.Type: GrantFiled: June 19, 2008Date of Patent: February 12, 2013Assignees: Tsinghua University, Nuctech Company LimitedInventors: Kejun Kang, Haifeng Hu, Yigang Yang, Zhiqiang Chen, Qitian Miao, Jianping Cheng, Yuanjing Li, Yinong Liu, Hua Peng, Tiezhu Li, Ziran Zhao, Yaohong Liu, Wanlong Wu
-
Patent number: 8217815Abstract: A Sigma-Delta modulator with a shared operational amplifier (op-amp) includes an integrated circuit, having two integrators sharing the op-amp, capable of integrating two input signals of the two integrators; a plurality of quantizers, coupled to the integrating circuit, for comparing outputting signals of the integrators with a predetermined signal and then generating digital outputting signals; a plurality of DACs, respectively coupled to the quantizers, for converting the digital outputting signals to analog feedback signals to the integrators; and a clock generator, for providing clock signals to the integrating circuit and the quantizers. Accordingly, layout area and power consumption of the modulator are reduced due to the shared op-amp.Type: GrantFiled: August 24, 2010Date of Patent: July 10, 2012Assignee: MStar Semiconductor, Inc.Inventors: Jianqiu Chen, Sterling Smith, Jianping Cheng
-
Publication number: 20110063155Abstract: A Sigma-Delta modulator with a shared operational amplifier (op-amp) includes an integrated circuit, having two integrators sharing the op-amp, capable of integrating two input signals of the two integrators; a plurality of quantizers, coupled to the integrating circuit, for comparing outputting signals of the integrators with a predetermined signal and then generating digital outputting signals; a plurality of DACs, respectively coupled to the quantizers, for converting the digital outputting signals to analog feedback signals to the integrators; and a clock generator, for providing clock signals to the integrating circuit and the quantizers. Accordingly, layout area and power consumption of the modulator are reduced due to the shared op-amp.Type: ApplicationFiled: August 24, 2010Publication date: March 17, 2011Applicant: MSTAR SEMICONDUCTOR, INC.Inventors: Jianqiu Chen, Sterling Smith, Jianping Cheng
-
Patent number: 7881424Abstract: A method for calibrating a dual-energy CT system and an image reconstruction method are disclosed to calculate images of atomic number and density of a scanned object as well as its attenuation coefficient images at any energy level. The present invention removes the effect from a cupping artifact due to X-ray beam hardening. The method for calibrating a dual-energy CT system is provided comprising steps of selecting at least two different materials, detecting penetrative rays from dual-energy rays penetrating said at least two different materials under different combinations of thickness to acquire projection values, and creating a lookup table in a form of correspondence between said different combinations of thickness and said projection values.Type: GrantFiled: March 11, 2008Date of Patent: February 1, 2011Assignees: Tsinghua University, Nuctech Company LimitedInventors: Li Zhang, Zhiqiang Chen, Gnowei Zhang, Jianping Cheng, Yuanjing Li, Yinong Liu, Yuxiang Xing, Ziran Zhao, Yongshun Xiao
-
Publication number: 20100266103Abstract: A photoneutron-x ray source includes a photoneutron conversion target, which outputs both photoneutrons and x-rays simultaneously. The photoneutron-x ray source includes an x-ray generator for generating an x-ray main beam that is applied to the photoneutron conversion target. The photoneutron conversion target generates photoneutrons upon the application of the x-ray main beam to the photoneutron conversion target. The photoneutron conversion target has a body that defines a passageway extending through the body and that is structured such that a first x-ray beam of the x-ray main beam can pass through the passageway without any reaction with the body, while a second x-ray beam of the x-ray main beam can enter the body and react with the body to emit the photoneutrons.Type: ApplicationFiled: June 19, 2008Publication date: October 21, 2010Inventors: Kejun Kang, Haifeng Hu, Yigang Yang, Zhiqiang Chen, Qitian Miao, Jianping Cheng, Yuanjing Li, Yinong Liu, Hua Peng, Tiezhu Li, Ziran Zhao, Yaohong Liu, Wanlong Wu
-
Publication number: 20100243874Abstract: A photoneutron conversion target for generating photoneutrons by directing an x-ray beam at the photoneutron conversion target includes an elongated body having a first end and a second end. When the photoneutron conversion target is in use, the x-ray beam enters the body and propagates in a direction from the first end to the second end. The body of the photoneutron conversion target is shaped such that propagation of the x-ray beam is substantially proportionate to an intensity distribution of the x-ray beam, so that the greater an intensity of x-rays of the x-ray beam, the greater the propagation distance of the x-rays within the body of the photoneutron conversion target. The photoneutron conversion target according to the invention can make full use of the x-ray beam so as to increase a yield of photoneutrons.Type: ApplicationFiled: June 19, 2008Publication date: September 30, 2010Inventors: Kejun Kang, Haifeng Hu, Yigang Yang, Zhiqiang Chen, Qitian Miao, Jianping Cheng, Yuanjing Li, Yinong Liu, Hua Peng, Tiezhu Li, Ziran Zhao, Yaohong Liu, Wanlong Wu
-
Publication number: 20100246763Abstract: A method and a system for contraband detection in an object using photoneutrons and x-rays includes an x-ray generator that generates an x-ray main beam including a first x-ray beam and a second x-ray beam, the first x-ray beam being directed to pass through the object. A photoneutron conversion target is arranged to receive the second x-ray beam so as to generate photoneutrons, the photoneutrons being directed to enter the object and react with the object to emit characteristic ?-rays. An x-ray detecting arrangement is arranged to receive the first x-ray beam that has passed through the object in order to perform x-ray imaging detection of the detected object. A ?-ray detecting arrangement is arranged to receive the characteristic ?-rays in order to perform neutron detection of the object based on the characteristic ?-rays. The x-ray imaging detection and the neutron detection are simultaneously performed.Type: ApplicationFiled: June 19, 2008Publication date: September 30, 2010Inventors: Kejun Kang, Haifeng Hu, Yigang Yang, Zhiqiang Chen, Qitian Miao, Jianping Cheng, Yuanjing Li