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1. 发明授权

US09843313B2 Apparatus and method for voltage alternating pulse output 有权
公开(公告)号：US09843313B2
公开(公告)日：2017-12-12
申请号：US14116074
申请日：2012-12-28
申请人： Nuctech Company Limited , Tsinghua University
发明人： Yaohong Liu , Chuanxiang Tang , Xinshui Yan , Wei Jia , Jianjun Gao , Jinsheng Liu , Wei Yin , Xiying Liu , Hao Shi
IPC分类号： H03K3/57 , H03K3/64 , H02M1/088 , H02M3/07
CPC分类号： H03K3/57 , H02M1/088 , H02M2003/077 , H03K3/64
摘要： The present invention provides a high voltage pulse modulating power source based on alternate group triggering, which comprises: a DC stabilized voltage source for supplying power to the high voltage pulse modulating power source; a plurality of solid-state switches; a plurality of triggers corresponding to said plurality of solid-state switches, wherein each trigger provides a trigger signal to its corresponding solid-state switch to turn on said corresponding solid-state switch, wherein said plurality of triggers are divided into at least two groups of triggers; a time sequence control module, which, at time t1, controls said plurality of triggers to generate trigger signals so as to turn on said plurality of solid-state switches simultaneously, and at time t2, controls one group of said at least two groups of triggers to generate trigger signals to turn on solid-state switches corresponding to this group of triggers, wherein time t1 and time t2 appear alternately.

2. 发明申请

US20170299762A1 SCAN METHOD, SCAN SYSTEM AND RADIATION SCAN CONTROLLER 审中-公开
公开(公告)号：US20170299762A1
公开(公告)日：2017-10-19
申请号：US15289206
申请日：2016-10-10
申请人： NUCTECH COMPANY LIMITED , Tsinghua University
发明人： Kejun Kang , Yaohong Liu , Ziran Zhao , Wei Jia , Jianping Gu , Chuanxiang Tang , Huaibi Chen , Jianjun Gao , Wei Yin , Xiying Liu
IPC分类号： G01V5/00 , G01N23/04
CPC分类号： G01V5/0016 , G01N23/04 , G01T1/29
摘要： This invention provides a scan method, scan system and radiation scan controller, and relates to the field of radiation. Wherein, the scan method of this invention comprises: obtaining detection data of an object to be inspected under radiation scanning using a detector; adjusting an accelerator output beam dose rate and/or an output electron beam energy level of a radiation emission device according to the detection data. With this method, working conditions of the accelerator of the radiation emission device may be adjusted according to the detection data detected by the detector, so that for a region having a larger mass thickness, a higher output beam dose rate or a higher electron beam output energy level is adopted to guarantee satisfied imaging technical indexes, for a region having a smaller mass thickness, a lower output beam dose rate or a lower electron beam output energy level is adopted to reduce the environmental dose level while guaranteeing satisfied imaging technical indexes.

3. 发明申请

US20140077619A1 APPARATUS AND METHOD FOR VOLTAGE ALTERNATING PULSE OUTPUT 有权
标题翻译：电压交替脉冲输出的装置和方法
公开(公告)号：US20140077619A1
公开(公告)日：2014-03-20
申请号：US14116074
申请日：2012-12-28
申请人： Tsinghua University , Nuctech Company Limited
发明人： Yaohong Liu , Chuanxiang Tang , Xinshui Yan , Wei Jia , Jianjun Gao , Jinsheng Liu , Wei Yin , Xiying Liu , Hao Shi
IPC分类号： H03K3/57
CPC分类号： H03K3/57 , H02M1/088 , H02M2003/077 , H03K3/64
摘要： The present invention provides a high voltage pulse modulating power source based on alternate group triggering, which comprises: a DC stabilized voltage source for supplying power to the high voltage pulse modulating power source; a plurality of solid-state switches; a plurality of triggers corresponding to said plurality of solid-state switches, wherein each trigger provides a trigger signal to its corresponding solid-state switch to turn on said corresponding solid-state switch, wherein said plurality of triggers are divided into at least two groups of triggers; a time sequence control module, which, at time t1, controls said plurality of triggers to generate trigger signals so as to turn on said plurality of solid-state switches simultaneously, and at time t2, controls one group of said at least two groups of triggers to generate trigger signals to turn on solid-state switches corresponding to this group of triggers, wherein time t1 and time t2 appear alternately.
摘要翻译：本发明提供一种基于交替组触发的高电压脉冲调制电源，包括：用于向高电压脉冲调制电源供电的直流稳压电压源; 多个固态开关; 与所述多个固态开关相对应的多个触发器，其中每个触发器向其对应的固态开关提供触发信号以打开所述对应的固态开关，其中所述多个触发器被分成至少两个组的触发器时间控制模块，其在时间t1控制所述多个触发器以产生触发信号，以同时接通所述多个固态开关，并且在时间t2，控制一组所述至少两组触发器产生触发信号以打开与该组触发相对应的固态开关，其中时间t1和时间t2交替出现。

4. 发明授权

US11026319B2 Multi-output high-voltage power supply and distributed ray source with multi-output high-voltage power supply 有权
公开(公告)号：US11026319B2
公开(公告)日：2021-06-01
申请号：US16727639
申请日：2019-12-26
申请人： Tsinghua University , NUCTECH COMPANY LIMITED , NuRay Technology Co., Ltd
发明人： Yuanjing Li , Yaohong Liu , Huaping Tang , Jinsheng Liu , Xiying Liu , Zhanfeng Qin , Wei Jia , Jinsong Pan
IPC分类号： H05G1/32 , H02M3/28 , H02M7/10 , H05G1/20 , H05G2/00
摘要： Embodiments of the present disclosure disclose a multi-output high-voltage power supply including a channel selection circuit (103) including a plurality of switches; and a high-voltage power supply module (101) connected to the channel selection circuit (103), wherein the high-voltage power supply module (101) includes a fine adjusting power supply component (110) and a plurality of coarse adjusting power supply components (120-1 to 120-N) connected in series, wherein one high-voltage output terminal of the high-voltage power supply module (101) is connected to a common terminal of the channel selection circuit (103), and the other high-voltage output terminal of the high-voltage power supply module (101) is grounded through a current sampling resistor.

5. 发明授权

US10495776B2 Scan method, scan system and radiation scan controller 有权
公开(公告)号：US10495776B2
公开(公告)日：2019-12-03
申请号：US15289206
申请日：2016-10-10
申请人： NUCTECH COMPANY LIMITED , Tsinghua University
发明人： Kejun Kang , Yaohong Liu , Ziran Zhao , Wei Jia , Jianping Gu , Chuanxiang Tang , Huaibi Chen , Jianjun Gao , Wei Yin , Xiying Liu
IPC分类号： G01V5/00 , G01T1/29 , G01N23/04
CPC分类号： G01V5/0016 , G01N23/04 , G01T1/29
摘要： This invention provides a scan method, scan system and radiation scan controller, and relates to the field of radiation. Wherein, the scan method of this invention comprises: obtaining detection data of an object to be inspected under radiation scanning using a detector; adjusting an accelerator output beam dose rate and/or an output electron beam energy level of a radiation emission device according to the detection data. With this method, working conditions of the accelerator of the radiation emission device may be adjusted according to the detection data detected by the detector, so that for a region having a larger mass thickness, a higher output beam dose rate or a higher electron beam output energy level is adopted to guarantee satisfied imaging technical indexes, for a region having a smaller mass thickness, a lower output beam dose rate or a lower electron beam output energy level is adopted to reduce the environmental dose level while guaranteeing satisfied imaging technical indexes.

6. 发明授权

US10578765B2 Scan method, scan system and radiation scan controller 有权
公开(公告)号：US10578765B2
公开(公告)日：2020-03-03
申请号：US16253221
申请日：2019-01-22
申请人： NUCTECH COMPANY LIMITED , TSINGHUA UNIVERSITY
发明人： Kejun Kang , Yaohong Liu , Ziran Zhao , Wei Jia , Jianping Gu , Chuanxiang Tang , Huaibi Chen , Jianjun Gao , Wei Yin , Xiying Liu
IPC分类号： G01V5/00 , G01T1/29 , G01N23/04
摘要： This invention provides a scan method, scan system and radiation scan controller, and relates to the field of radiation. The scanning method includes obtaining detection data of an object to be inspected under radiation scanning using a detector, adjusting an accelerator output beam dose rate and/or an output electron beam energy level of a radiation emission device according to the detection data. With this method, working conditions of the accelerator of the radiation emission device may be adjusted according to the detection data detected by the detector, so that for a region having a larger mass thickness, a higher output beam dose rate or a higher electron beam output energy level is adopted to guarantee satisfied imaging technical indexes, for a region having a smaller mass thickness, a lower output beam dose rate or a lower electron beam output energy level is adopted to reduce the environmental dose level while guaranteeing satisfied imaging technical indexes.

7. 发明授权

US10340783B2 Apparatus and method for controlling pulse output 有权
公开(公告)号：US10340783B2
公开(公告)日：2019-07-02
申请号：US14008921
申请日：2012-12-28
申请人： Nuctech Company Limited , Tsinghua University
发明人： Yaohong Liu , Chuanxiang Tang , Xinshui Yan , Wei Jia , Jianjun Gao , Jinsheng Liu , Wei Yin , Xiying Liu , Hao Shi
IPC分类号： H02M1/08 , H03K7/08 , H03K3/57
摘要： The present invention provides a pulse modulating power source, which comprises: a plurality of discharging modules connected in series during discharging; a plurality of triggers corresponding to said plurality of discharging modules, wherein each trigger provides a trigger signal to the corresponding discharging module to turn it on; a control logic module for controlling the trigger signals so as to turn on said plurality of discharging modules successively with a time delay; an output terminal for outputting a voltage.

8. 发明授权

US10694616B2 Filament power supply for electron accelerator and electron accelerator 有权
公开(公告)号：US10694616B2
公开(公告)日：2020-06-23
申请号：US16667849
申请日：2019-10-29
申请人： NUCTECH COMPANY LIMITED
发明人： Jinsheng Liu , Yaohong Liu , Wei Jia , Xinshui Yan , Wei Li
IPC分类号： H01J7/44 , H05H7/02 , H02H9/02 , H03K7/08 , H01J37/248
摘要： The present disclosure provides a filament power supply for an electron accelerator and an electron accelerator. The filament power supply includes: a rectifier circuit configured to convert a power frequency AC voltage signal into a DC voltage signal; an inverter circuit configured to convert the DC voltage signal into an AC voltage signal; a sampling circuit configured to sample the AC voltage signal to obtain a current sampling signal or a voltage sampling signal; a pulse width modulation control chip configured to adjust a pulse width modulation signal until a voltage of the current sampling signal is equal to that of a reference current signal, or a voltage of the voltage sampling signal is equal to that of a reference voltage signal; a modulation circuit configured to modulate the power frequency AC voltage signal to obtain a modulation signal and output the pulse width modulation signal and the modulation signal.

9. 发明授权

US11737202B2 Method, apparatus and system for controlling standing wave linear accelerator 有权
公开(公告)号：US11737202B2
公开(公告)日：2023-08-22
申请号：US17247800
申请日：2020-12-23
申请人： NUCTECH COMPANY LIMITED
发明人： Yaohong Liu , Jinsheng Liu , Wei Jia , Wei Yin , Feng Gao , Xiying Liu , Haokun Wang
IPC分类号： H05H9/04 , H05H7/02
CPC分类号： H05H9/04 , H05H7/02 , H05H2007/027
摘要： Embodiments of the disclosed technology provide an apparatus for controlling a standing wave linear accelerator. An example standing wave linear accelerator includes an accelerating tube, a motor, and a microwave power source connected between the accelerating tube and the motor. An example apparatus includes a main processor configured to receive an envelope signal of a reflected wave signal output by the accelerating tube, determine whether an amplitude of the envelope signal is greater than an envelope threshold, and if it is determined that the amplitude of the envelope signal is less than the envelope threshold, determine whether to change a rotation direction of the motor by comparing the amplitude of the envelope signal with an envelope reference signal stored in a memory. The memory is connected to the main processor and is configured to store the envelope threshold and the envelope reference signal.

10. 发明申请

US20190089344A1 PROTECTION CIRCUIT, OSCILLATION COMPENSATION CIRCUIT AND POWER SUPPLY CIRCUIT IN SOLID STATE PULSE MODULATOR 审中-公开
公开(公告)号：US20190089344A1
公开(公告)日：2019-03-21
申请号：US16110355
申请日：2018-08-23
申请人： Nuctech Company Limited
发明人： Yaohong Liu , Ziran Zhao , Jinsheng Liu , Wei Jia , Wei Li , Xinshui Yan
IPC分类号： H03K17/0812 , H03K17/567
摘要： The disclosed technology relates to a gate protection circuit for an Insulated Gate Bipolar Transistor (IGBT), the IGBT being used as a switch device in a solid state pulse modulator based on the MARX generator principle, the gate protection circuit including: a voltage regulator configured to supply a stable voltage to an emitter of the IGBT with respect to the ground for a gate of the IGBT.

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