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公开(公告)号：US10732306B2
公开(公告)日：2020-08-04
申请号：US15700380
申请日：2017-09-11
Applicant: Nuctech Company Limited , Tsinghua University
Inventor： Yigang Yang , Yuanjing Li , Zhujun Fang , Yulan Li
Abstract: A slow neutron detection device is disclosed, comprising: a first slow neutron converter and a second slow neutron converter, and a readout electrode wire set and cathode wire sets arranged between the first slow neutron converter and the second slow neutron converter. By arranging a readout circuit between the two slow neutron converters, an electron drift distance is reduced by half without changing a dimension of the detection device, and an average over-threshold probability of a signal is increased.
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公开(公告)号：US10466372B2
公开(公告)日：2019-11-05
申请号：US14981953
申请日：2015-12-29
Applicant: TSINGHUA UNIVERSITY , NUCTECH COMPANY LIMITED
Inventor： Kejun Kang , Shuwei Li , Qingjun Zhang , Yuanjing Li , Yulan Li , Ziran Zhao , Yinong Liu , Yaohong Liu , Weibin Zhu , Xiaolin Zhao , Huishao He
IPC: G01T7/00 , G01T1/20 , H04N5/57 , G01T1/16 , H01L27/30 , H05G1/36 , G21K1/02 , G01T1/17 , G01V5/00 , H04N5/369 , G06T1/00
Abstract: The present invention discloses an X-ray beam intensity monitoring device and an X-ray inspection system. The X-ray beam intensity monitoring device comprises an intensity detecting module and a data processing module, wherein the intensity detecting module is adopted to be irradiated by the X-ray beam and send a detecting signal, the data processing module is coupled with the intensity detecting module to receive the detecting signal and output an X-ray beam intensity monitoring signal, wherein the X-ray beam intensity monitoring signal includes a dose monitoring signal for the X-ray beam and a brightness correction signal for correcting signal values of the X-ray beam. The X-ray beam intensity monitoring device can simultaneously perform dose monitoring and brightness monitoring, thereby improving the service efficiency of the X-ray beam intensity monitoring device. Moreover, the monitoring result of the X-ray beam intensity can be more accurate and reliable.
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公开(公告)号：US10302578B2
公开(公告)日：2019-05-28
申请号：US15494884
申请日：2017-04-24
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Liang Li , Zhiqiang Chen , Kejun Kang , Li Zhang , Ziran Zhao , Yuxiang Xing , Jianmin Li , Yulan Li , Tiao Zhao
IPC: G01N23/046 , G01N23/087
Abstract: Methods and system for decomposing a high-energy dual-energy X-ray CT material are disclosed. In the method, two types of effect such as Compton effect and electron pairing effect which dominates are reserved and the influence of the other effect such a photoelectric effect is removed so as to improve the accuracy of the material decomposition. The unique advantage of the present disclosure is to effectively remove the error of the calculated atomic number Z due to directly selecting two effects during processes of material decomposition in the conventional dual-energy CT method. This may greatly improve the accuracy of dual-energy CT identification of the material, and it is important to improve the conventional dual-use CT imaging system applications, such as clinical therapy, security inspection, industrial non-destructive testing, customs anti-smuggling and other fields.
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公开(公告)号：US10088595B2
公开(公告)日：2018-10-02
申请号：US14399566
申请日：2014-07-31
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Kejun Kang , Jianmin Li , Jingyu Gu , Yuanjing Li , Yulan Li , Yaohong Liu , Zhen Tan , Yucheng Wu , Weizhen Wang
Abstract: The present disclosure provides a system and method for inspecting an aircraft. An X-ray/Gamma ray radiation source and a detector are located at above and below a fuselage of an aircraft, respectively. The X-ray/Gamma ray radiation source emits a beam of radiation[ ], wherein the X-ray/Gamma ray radiation[ ] passes through the aircraft to be inspected. The detector receives and converts the beam of X-ray/Gamma ray radiation[ ] that has passed through the aircraft to an output signal, and the system generates a vertical transmission image in real time.
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公开(公告)号：US20180164449A1
公开(公告)日：2018-06-14
申请号：US15719571
申请日：2017-09-29
Applicant: Nuctech Company Limited , Tsinghua University
Inventor： Yuanjing Li , Ziran Zhao , Jianmin Li , Yulan Li , Weibin Zhu , Xiang Zou , Qingjun Zhang , Chunguang Zong , Xiaolin Zhao , Shuwei Li , Junxiao Wang
IPC: G01T1/24
Abstract: This disclosure provides a radiation detection apparatus and a method, a data processing method and a processor, which relates to the field of radiation detection technology. Wherein, the radiation detection apparatus of this disclosure comprises: a radiation detector which generates an electrical signal by interacting with X-rays; an Analog-to-Digital Converter (ADC) which is coupled to the radiation detector and transmits the electrical signal to a waveform data; and a data processor which receives the waveform data from the ADC, determines the number of single photon signals according to the waveform data, and determines whether an integral signal and/or a count signal of the waveform data will be used for imaging according to the number of the single photon signals.
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Patent Agency Ranking
公开(公告)号：US20180022301A1
公开(公告)日：2018-01-25
申请号：US15609013
申请日：2017-05-31
Applicant: NUCTECH COMPANY LIMITED , Tsinghua University
Inventor： Jianmin Li , Hao Yu , Zhiqiang Chen , Yuanjing Li , Yulan Li , Li Zhang , Jingyu Gu , Dongyu Wang
IPC: B60R16/033 , H01M10/052 , H01M10/42 , H02J7/00
CPC classification number: B60R16/033 , H01M10/052 , H01M10/4207 , H02J3/14 , H02J7/0021 , Y02B70/3225 , Y04S20/222
Abstract: The present disclosure discloses an in-vehicle detection system and power supply system and power supply controller, which relates to the power supply control field. The power supply system comprises a low-power generator; a battery pack for supplying power to the in-vehicle detection system; a charger electrically connected to the low-power generator and the battery pack, respectively; and a power supply controller electrically connected to the battery pack and the low-power generator, respectively. The present disclosure uses a low-power generator and a battery pack to substitute a high-power generator, which can reduce the requirement on a peak power of the generator by the in-vehicle detection system, and improve the efficiency of the power supply. In addition, since a low-power generator and a lithium battery pack are used to substitute the high-power generator, it is favorable to the lightweight design of the in-vehicle detection system, and meanwhile reduces noises and vibration, and is favorable to improving the user experience and performance metrics.
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公开(公告)号：US09835739B2
公开(公告)日：2017-12-05
申请号：US14800635
申请日：2015-07-15
Applicant: TSINGHUA UNIVERSITY , NUCTECH COMPANY LIMITED
Inventor： Lan Zhang , Yulan Li , Yuanjing Li , Jianqiang Fu , Yingshuai Du , Wei Zhang , Xuming Ma , Jun Li
Abstract: The present invention provides a method and apparatus for processing signals of a semiconductor detector, including: acquiring a relationship of a time difference between anode and cathode signals of the semiconductor detector with an anode signal amplitude; obtaining an optimal data screening interval according to the relationship of the time difference between anode and cathode signals of the semiconductor detector with the anode signal amplitude, wherein the optimal data screening interval is an interval where the time difference between the anode and cathode signals is greater than 50 ns; and screening and processing the collected data according to the optimal data screening interval when the semiconductor detector collects data. The present invention better overcomes the inherent crystal defects of the detector, reduces the effect of background noise, increases the energy resolution of the cadmium zinc telluride detector under room temperature, and improves the peak-to-compton ratio.
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公开(公告)号：US09448188B2
公开(公告)日：2016-09-20
申请号：US14412516
申请日：2013-07-02
Applicant: Nuctech Company Limited , Tsinghua University
Inventor： Jianmin Li , Yinong Liu , Yulan Li , Chunguang Zong , Hui Gong , Qingping Huang , Weifeng Yu
CPC classification number: G01N23/10 , G01N23/04 , G01N2223/301 , G01N2223/308 , G01V5/0016 , G01V5/0066
Abstract: The present invention discloses a vehicular radiation inspection system comprising a mobile vehicle body, a detection arm, a radiation source and a detector. The vehicular radiation inspection system further comprises a following mechanism separated from the detection arm. The following mechanism contains radiation protection material, and the following mechanism follows the detection arm to move in a non-contact manner during inspection of the inspected object, so as to prevent radiation leakage. In the present invention, it does not need to infuse radiation protection material having a high density, such as lead, into the detection arm. Therefore, it can effectively decrease the weight of the detection arm, and it does not need to provide a balance counterweight on the mobile vehicle body on which the detection arm is carried, thereby effectively solving the problem that the vehicular radiation inspection system has an excessively large mass. Meanwhile, in the present invention, the moving process of the following mechanism is accurately controlled, so as to prevent the following mechanism from hitting the detection arm.
Abstract translation: 本发明公开了一种包括移动车身，检测臂，辐射源和检测器的车辆辐射检查系统。 车辆辐射检查系统还包括与检测臂分离的跟随机构。 以下机构包含辐射防护材料，并且在检查被检查物体的检查期间，跟随检测臂的机构以非接触的方式移动，以防止辐射泄漏。 在本发明中，不需要将诸如铅的高密度的辐射防护材料注入到检测臂中。 因此，能够有效地降低检测臂的重量，并且不需要在携带检测臂的移动体上提供平衡配重，从而有效地解决了车辆用辐射检查系统过度的问题 大量。 同时，在本发明中，精确地控制以下机构的移动过程，以防止以下机构撞击检测臂。
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公开(公告)号：US09261610B2
公开(公告)日：2016-02-16
申请号：US14574848
申请日：2014-12-18
Applicant: Nuctech Company Limited
Inventor： Qingjun Zhang , Yuanjing Li , Zhiqiang Chen , Yulan Li , Qiufeng Ma , Ziran Zhao , Yinong Liu , Jianping Chang
Abstract: The present disclosure provides a High-Purity Germanium (HPGe) detector, comprising: a HPGe single crystal having an intrinsic region exposed surface; a first electrode and a second electrode connected to a first contact electrode and a second contact electrode of the HPGe single crystal respectively; and a conductive guard ring arranged in the intrinsic region exposed surface around the first electrode to separate the intrinsic region exposed surface into an inner region and an outer region. A leakage current derived from the intrinsic region exposed surface of the HPGe detector can be separated from the current of the HPGe detector by the conductive guard ring provided in the surface, thereby suppressing the interference of the surface leakage current.
Abstract translation: 本公开提供了一种高纯锗（HPGe）检测器，包括：具有固有区域暴露表面的HPGe单晶; 分别连接到HPGe单晶的第一接触电极和第二接触电极的第一电极和第二电极; 以及布置在第一电极周围的本征区域暴露表面中的导电保护环，以将本征区域暴露表面分离成内部区域和外部区域。 从HPGe检测器的本征区域暴露表面导出的泄漏电流可以通过设置在表面中的导电保护环与HPGe检测器的电流分离，从而抑制表面泄漏电流的干扰。
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公开(公告)号：US20140319635A1
公开(公告)日：2014-10-30
申请号：US14152332
申请日：2014-01-10
Applicant: TSINGHUA UNIVERSITY , NUCTECH COMPANY LIMITED
Inventor： Yuanjing Li , Lan Zhang , Yulan Li , Yinong Liu , Jianqiang Fu , Hao Jiang , Zhi Deng , Tao Xue , Wei Zhang , Jun Li
Abstract: The invention provides a semiconductor detector, and the semiconductor detector comprises a semiconductor crystal, a cathode, an anode and at least one ladder electrode; the semiconductor crystal comprises a top surface, a bottom surface and at least one side; the cathode, the anode and the ladder electrode are conductive thin films deposited on a surface of the semiconductor crystal; the cathode is disposed on the bottom surface of the semiconductor crystal, the anode is disposed on the top surface of the semiconductor crystal, the ladder electrode is disposed on the at least one side of the semiconductor crystal; and the ladder electrode comprises a plurality of sub-electrodes. As compared to the prior art, the semiconductor detector can improve the energy resolution.
Abstract translation: 本发明提供一种半导体检测器，该半导体检测器包括半导体晶体，阴极，阳极和至少一个梯形电极; 半导体晶体包括顶表面，底表面和至少一个侧面; 阴极，阳极和梯形电极是沉积在半导体晶体表面上的导电薄膜; 阴极设置在半导体晶体的底表面上，阳极设置在半导体晶体的顶表面上，梯形电极设置在半导体晶体的至少一个侧面上; 并且梯形电极包括多个子电极。 与现有技术相比，半导体检测器可以提高能量分辨率。
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