Patents by Inventor Chuanxiang Tang
Chuanxiang Tang 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: 9620325Abstract: CT Devices and methods thereof are disclosed. The CT device comprises an electron beam generation unit, a circular reflection target (9) and a circular detector array. The electron beam generation unit comprises an electron gun (7), a deflection scanning unit and a restrictor (16), wherein the electron gun (7) generates electron beams, the deflection scanning unit deflects the electron beams with a deflection direction varying as time so as to implement a circular scanning, and the restrictor (16) has a plurality of circularly distributed holes, and wherein when the electron beams scan along the circularly distributed holes, a plurality of electron beams that are distributed circularly are output. The circular reflection target (9) is disposed to be coaxial with the circularly distributed electron beams, wherein the circularly distributed electron beams bombard the circular reflection target (9) to generate X-rays that intersect the axis of the circularly distributed electron beams.Type: GrantFiled: October 31, 2013Date of Patent: April 11, 2017Assignees: Tsinghua University, Nuctech Company LimitedInventors: Kejun Kang, Chuanxiang Tang, Ziran Zhao, Zhe Zhang
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Patent number: 9615438Abstract: CT devices and methods thereof are disclosed. The CT device comprises a circular electron beam emission array including a plurality of electron beam emission units that are distributed uniformly along a circle, wherein each electron beam emission unit emits electron beams that are substantially parallel to an axis of the circular electron beam emission array in sequence under the control of a control signal; a circular reflection target which is disposed to be coaxial with the circular electron beam emission array, wherein the electron beams bombard the circular reflection target to generate X-rays that intersect the axis of the circular electron beam emission array; and a circular detector array which is disposed to be coaxial with the circular reflection target and configured to include a plurality of detection units which receive the X-rays after they have passed through an object to be detected.Type: GrantFiled: November 21, 2013Date of Patent: April 4, 2017Assignees: NUCTECH COMPANY LIMITED, TSINGHUA UNIVERSITYInventors: Kejun Kang, Chuanxiang Tang, Ziran Zhao, Zhe Zhang
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Patent number: 9585235Abstract: This invention relates to an apparatus producing distributed X-ray, and in particular to a cathode control multi-cathode distributed X-ray apparatus, which produces X-ray that changes focal position in a predetermined order by arranging multiple independent hot cathodes and controlling cathodes in an X-ray source device, and a CT device having said X-ray apparatus.Type: GrantFiled: June 29, 2016Date of Patent: February 28, 2017Assignees: NUCTECH COMPANY LIMITED, TSINGHUA UNIVERSITYInventors: Huaping Tang, Chuanxiang Tang, Huaibi Chen
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Patent number: 9508525Abstract: An apparatus and a method are for generating a flattening x-ray radiation field. The apparatus includes: plurality of electron accelerators for generating high-energy electron beam current; and a common target unit including a vacuum target chamber, a target and plurality of input connectors. The plurality of input connectors are connected to one side of the vacuum target chamber and the target is installed at the other side of the vacuum target chamber opposing the plurality of input connectors, the axes of which intersect in pairs at one point in an predetermined included angle. The plurality of electron accelerators are connected to the plurality of input connectors.Type: GrantFiled: September 23, 2014Date of Patent: November 29, 2016Assignees: NUCTECH COMPANY LIMITED, Tsinghua UniversityInventors: Kejun Kang, Chuanxiang Tang, Huaping Tang, Huaibi Chen, Wenhui Huang
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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
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Publication number: 20160316548Abstract: This invention relates to an apparatus producing distributed X-ray, and in particular to a cathode control multi-cathode distributed X-ray apparatus, which produces X-ray that changes focal position in a predetermined order by arranging multiple independent hot cathodes and controlling cathodes in an X-ray source device, and a CT device having said X-ray apparatus.Type: ApplicationFiled: June 29, 2016Publication date: October 27, 2016Inventors: Huaping TANG, Chuanxiang TANG, Huaibi CHEN
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Patent number: 9426877Abstract: A standing wave electron linear accelerating apparatus and a method thereof are disclosed. The apparatus comprises an electron gun configured to generate electron beams; a pulse power source configured to provide a primary pulse power signal; a power divider coupled downstream from the pulse power source and configured to divide the primary pulse power signal outputted from the pulse power source into a first pulse power signal and a second pulse power signal; a first accelerating tube configured to accelerating the electron beams with the first pulse power signal; a second accelerating tube configured to accelerate the electron beams with the second pulse power signal; a phase shifter configured to continuously adjust a phase difference between the first pulse power signal and the second pulse power signal so as to generate accelerated electron beams with continuously adjustable energy at output of the second accelerating tube.Type: GrantFiled: December 20, 2013Date of Patent: August 23, 2016Assignees: Tsinghua University, Nuctech Company LimitedInventors: Chuanxiang Tang, Zhe Zhang, Qingxiu Jin, Jiaru Shi, Huaibi Chen, Wenhui Huang, Shuxin Zheng, Yaohong Liu
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Patent number: 9398677Abstract: This invention relates to an apparatus producing distributed X-ray, and in particular to a cathode control multi-cathode distributed X-ray apparatus, which produces X-ray that changes focal position in a predetermined order by arranging multiple independent hot cathodes and controlling cathodes in an X-ray source device, and a CT device having said X-ray apparatus.Type: GrantFiled: December 19, 2013Date of Patent: July 19, 2016Assignees: NUCTECH COMPANY LIMITED, TSINGHUA UNIVERSITYInventors: Huaping Tang, Chuanxiang Tang, Huaibi Chen
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Publication number: 20160170074Abstract: The present disclosure discloses an alignment system and an alignment method for a container or vehicle inspection system, and an inspection system. The inspection system comprises comprising an ray source, a collimator, a detector arm and a detector module mounted on a detector arm, the ray source, the collimator and the detector module are arranged to form an inspection passage, a ray beam emitted from the ray source passes through collimator and irradiates onto an inspected object, and an attenuated ray beam is collected by the detector module so as to complete inspection. The alignment system comprises a measuring module arranged to receive the ray beam emitted from the collimator and to measure the ray beam so as to determine positions and orientations of the ray source and the collimator. With the alignment method, alignment between a center point of the ray source, a central line of a detector tip and a central line of the collimator may be more accurately measured.Type: ApplicationFiled: December 11, 2015Publication date: June 16, 2016Inventors: Jianmin LI, Yulan LI, Yuanjing LI, Hao YU, Chunguang ZONG, Jingyu GU, Weifeng YU, Quanwei SONG, Weizhen WANG, Shangmin SUN, Yinong LIU, Junli LI, Chuanxiang TANG
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Publication number: 20160044771Abstract: An improved optical undulator for use in connection with free electron radiation sources is provided. A tilt is introduced between phase fronts of an optical pulse and the pulse front. Two such pulses in a counter-propagating geometry overlap to create a standing wave pattern. A line focus is used to increase the intensity of this standing wave pattern. An electron beam is aligned with the line focus. The relative angle between pulse front and phase fronts is adjusted such that there is a velocity match between the electron beam and the overlapping optical pulses along the line focus. This allows one to provide a long interaction length using short and intense optical pulses, thereby greatly increasing the radiation output from the electron beam as it passes through this optical undulator.Type: ApplicationFiled: March 14, 2014Publication date: February 11, 2016Inventors: Chao Chang, Chuanxiang Tang, Juhao Wu
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Publication number: 20150340192Abstract: CT Devices and methods thereof are disclosed. The CT device comprises an electron beam generation unit, a circular reflection target (9) and a circular detector array. The electron beam generation unit comprises an electron gun (7), a deflection scanning unit and a restrictor (16), wherein the electron gun (7) generates electron beams, the deflection scanning unit deflects the electron beams with a deflection direction varying as time so as to implement a circular scanning, and the restrictor (16) has a plurality of circularly distributed holes, and wherein when the electron beams scan along the circularly distributed holes, a plurality of electron beams that are distributed circularly are output. The circular reflection target (9) is disposed to be coaxial with the circularly distributed electron beams, wherein the circularly distributed electron beams bombard the circular reflection target (9) to generate X-rays that intersect the axis of the circularly distributed electron beams.Type: ApplicationFiled: October 31, 2013Publication date: November 26, 2015Inventors: Kejun Kang, Chuanxiang Tang, Ziran Zhao, Zhe Zhang
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Publication number: 20150342013Abstract: CT devices and methods thereof are disclosed. The CT device comprises a circular electron beam emission array including a plurality of electron beam emission units that are distributed uniformly along a circle, wherein each electron beam emission unit emits electron beams that are substantially parallel to an axis of the circular electron beam emission array in sequence under the control of a control signal; a circular reflection target which is disposed to be coaxial with the circular electron beam emission array, wherein the electron beams bombard the circular reflection target to generate X-rays that intersect the axis of the circular electron beam emission array; and a circular detector array which is disposed to be coaxial with the circular reflection target and configured to include a plurality of detection units which receive the X-rays after they have passed through an object to be detected.Type: ApplicationFiled: November 21, 2013Publication date: November 26, 2015Inventors: Kejun Kang, Chuanxiang Tang, Ziran Zhao, Zhe Zhang
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Publication number: 20150342014Abstract: CT devices and methods thereof are disclosed. The CT device comprises a circular electron gun array including a plurality of electron guns, each of the electron guns is configured to emit electron beams along the radial direction of the circular electron gun array in sequence according to a predetermine pulse sequence; an acceleration cavity disposed inside of a circle on which the circular electron gun array is positioned, including a plurality of nested concentric coaxial cavities that operate in ? mode for accelerating electron beams emitted from the respective electron guns of the circular electron gun array; a circular transmission target disposed inside of a circle on which the acceleration cavity is positioned and being bombarded by the accelerated electron beams to generate X-rays; and a circular detector configured to receive the X-rays after they have passed through an object to be detected.Type: ApplicationFiled: October 31, 2013Publication date: November 26, 2015Inventors: Kejun Kang, Chuanxiang Tang, Ziran Zhao, Zhe Zhang
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Patent number: 9148944Abstract: The present disclosure discloses an electron linear accelerator system. In the present disclosure, a fast-switching dual-path microwave system is proposed, wherein, one path can be directly connected to an accelerating tube, and the other path can be input into the accelerating tube after a magnitude of the microwave power is changed by devices such as an attenuator, a power divider, a pulse compressor or even an amplifier etc., so as to achieve fast switch of the power input into the accelerator and adjust the energy output by the accelerator.Type: GrantFiled: September 16, 2014Date of Patent: September 29, 2015Assignees: Nuctech Company Limited, Tsinghua UniversityInventors: Chuanxiang Tang, Jiaru Shi, Qingxiu Jin, Huaibi Chen, Wenhui Huang
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Publication number: 20150187535Abstract: The present invention provides an X-ray generating apparatus and an X-ray fluoroscopy imaging system comprising the same. The X-ray generating apparatus comprises: an electron accelerator including an electron acceleration unit, an electron emission unit, and a target; a shielding and collimating device, including a shielding structure and a collimator arranged in the shielding structure, wherein the target is surrounded by the shielding structure, the collimator is arranged in a direction passing through the target point and forming an angle from 30 degrees to 150 degrees with the electron beam shooting the target.Type: ApplicationFiled: December 23, 2014Publication date: July 2, 2015Inventors: Huaping TANG, Chuanxiang TANG, Huaibi CHEN
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Publication number: 20150185166Abstract: The X-ray fluoroscopic imaging system of the present invention comprises: an inspection passage; an electron accelerator; a shielding collimator apparatus comprising a shielding structure, and a first collimator for extracting a low energy planar sector X-ray beam and a second collimator for extracting a high energy planar sector X-ray beam which are disposed within the shielding structure; a low energy detector array for receiving the X-ray beam from the first collimator; and a high energy detector array for receiving the X-ray beam from the second collimator. The first collimator, the low energy detector array and the target point bombarded by the electron beam are located in a first plane; and the second collimator, the high energy detector array and the target point bombarded by the electron beam are located in a second plane.Type: ApplicationFiled: December 23, 2014Publication date: July 2, 2015Inventors: Huaping TANG, Zhiqiang CHEN, Chuanxiang TANG, Huaibi CHEN, Yuanjing LI, Ziran ZHAO, Yaohong LIU, Shangmin SUN, Xinshui YAN, Zhanfeng QIN
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Publication number: 20150185356Abstract: The present invention may perform fluoroscopic imaging simultaneously on the subjects in at least two channels using only one electron accelerator, at least two sets of X-ray beams and at least two sets of detector systems, through the design of the electron accelerator, the shielding and collimating device, the at least two detector arrays and various mechanical composite structures. The X-ray fluoroscopic imaging system according to the present invention may be designed in specific forms of a stationary type, an assembled type, a track mobile type or vehicular mobile type, etc., and has advantages such as simple structure, low cost, strong function, good image quality and the like.Type: ApplicationFiled: December 23, 2014Publication date: July 2, 2015Inventors: Huaping TANG, Zhiqiang CHEN, Chuanxiang TANG, Huaibi CHEN, Yuanjing LI, Ziran ZHAO, Yaohong LIU, Shangmin SUN, Xinshui YAN, Zhanfeng QIN
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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
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Publication number: 20150084550Abstract: The present disclosure discloses an electron linear accelerator system. In the present disclosure, a fast-switching dual-path microwave system is proposed, wherein, one path can be directly connected to an accelerating tube, and the other path can be input into the accelerating tube after a magnitude of the microwave power is changed by devices such as an attenuator, a power divider, a pulse compressor or even an amplifier etc., so as to achieve fast switch of the power input into the accelerator and adjust the energy output by the accelerator.Type: ApplicationFiled: September 16, 2014Publication date: March 26, 2015Inventors: Chuanxiang TANG, Jiaru SHI, Qingxiu JIN, Huaibi CHEN, Wenhui HUANG
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Publication number: 20150085989Abstract: An apparatus and a method are for generating a flattening x-ray radiation field. The apparatus includes: plurality of electron accelerators for generating high-energy electron beam current; and a common target unit including a vacuum target chamber, a target and plurality of input connectors. The plurality of input connectors are connected to one side of the vacuum target chamber and the target is installed at the other side of the vacuum target chamber opposing the plurality of input connectors, the axes of which intersect in pairs at one point in an predetermined included angle. The plurality of electron accelerators are connected to the plurality of input connectors.Type: ApplicationFiled: September 23, 2014Publication date: March 26, 2015Inventors: Kejun Kang, Chuanxiang Tang, Huaping Tang, Huaibi Chen, Wenhui Huang