Nuctech Company Limited

Tsinghua University

Wenguo Liu

Zhiqiang Chen

Yuanjing Li

Wanlong Wu

Ziran Zhao

Yinong Liu

Bin Sang

Lei Zheng

Yingkang Jin

Xilei Luo

Zhimin Zheng

Shuo Cao

Fuhua Ding

Jieqing Yang

Li Ni Zhang

Yaohong Liu

Qingjun Zhang

Kejun Kang

Guang Yang

Shangmin Sun

Ming Ruan

Bin Hu

Le Tang

Yucheng Wu

Yanli Deng

Zongjun Shen

Xuming Ma

Liming Wang

Siyuan Liang

Xianli Ding

Chenguang Zhu

Yan You

Zhenbin Guo

Lingbo Qiao

Huan Xie

Liaohua Fu

The present disclosure provides an X-ray tube device and a spring pin for an X-ray tube device. In an embodiment, the X-ray tube device includes: an outer cylinder assembly having an anode end and a cathode end, an anode end cap assembly provided at the anode end of the outer cylinder assembly and including an X-ray tube, a cathode end cap assembly provided at the cathode end of the outer cylinder assembly and including a high voltage receptacle for an external power supply, and a spring pin connection assembly provided in the outer cylinder assembly and connecting a filament lead of the X-ray tube to the high voltage receptacle.

X-ray tube device and spring pin

An extensible millimeter wave security inspection system, a security inspection method for a human body using the extensible millimeter wave security inspection system and an extensible millimeter wave scanning unit are disclosed. The extensible millimeter wave security inspection system includes at least one security inspection passage, at least one scanning units are provided on at least one side of two sides of each security inspection passage, each scanning unit includes at least one millimeter wave transceiving module, the millimeter wave transceiving module includes an array of millimeter wave antennas configured to transmit and receive millimeter wave signals and a millimeter wave transceiver associated with the array of millimeter wave antennas, and the millimeter wave transceiving module is arranged to scan by millimeter wave a target to be inspected in the security inspection passage along a direction in which the security inspection passage extends.

Extensible millimeter wave security inspection system, scanning unit and security inspection method for human body

There is provided a wideband patch antenna and an antenna array. The antenna includes a dielectric substrate of a rectangle shape, a radiation patch formed on a top surface of the dielectric substrate, a coupling patch formed on the top surface of the dielectric substrate and extending from a side of the dielectric substrate to a position from the radiation patch by a distance, a metal support arranged on the lower surface of the dielectric substrate and extending from the edge of the lower surface of the dielectric substrate downward to the ground, a layer of air having a predetermined thickness being formed between the lower surface of the dielectric substrate and the ground. According to the embodiments, it is possible to improve the directivity of the wideband microstrip antenna while maintaining its small size.

Wideband microstrip antennas and antenna arrays

A circuit to generate a sweep frequency signal that includes a reference frequency source to generate a reference frequency signal, a first frequency combination circuit coupled to the reference frequency source, and operative to generate a sweep frequency signal in a first frequency band based on the reference frequency signal, a second frequency combination circuit coupled to the reference frequency source, and operative to generate a sweep frequency signal in a second frequency band different from the first frequency band based on the reference frequency signal, a multiple-level switch coupled to outputs of the first frequency combination circuit and the second frequency combination circuit, and a control circuit controlling the first and second frequency combination circuits and the multiple-level switch to output the sweep frequency signal in the first frequency band and the sweep frequency signal in the second frequency band at an output of the multiple-level switch alternately.

Circuits for generating sweep frequency signal

The present invention provides a human body security inspection method and system. The method comprises: retrieving in real-time scanning row or column image data of a personal to be inspected; transmitting in real-time the image data to an algorithm processing module and processing these image data by the module; automatically recognizing a suspicious matter by a suspicious matter automatic target recognition technique, after retrieving an image data of an entire scanning image of the personal; any of the following three inspection modes is selected, so as to perform a further processing on basis of the recognition result of the suspicious matter, (1) in a manner of automatic target recognition technique, (2) in a combination manner of the automatic target recognition technique and a privacy protection image; and (3) a combination manner of the automatic target recognition technique, a privacy protection image and human intervention.

Human body security inspection method and system

There is provided a waveguide horn array, a method for forming the waveguide horn array, and an antenna system. The array includes a rectangular metal plate which is processed to have a cross section comprised of a plurality of rectangular holes arranged in the length direction of the rectangular metal plate, the lower part of each hole being formed as a rectangular waveguide, and the upper part of each hole being formed as a horn; and a groove extending in the direction along which the plurality of holes are arranged and having a predetermined depth, which is formed at two sides of the holes on the top surface of the rectangular metal plate. According to the embodiments, it is possible to maintain the good properties of the antenna in terms of bandwidth and directivity, while enhancing the isolation between the transmitting antenna and the receiving antenna in the system.

Waveguide horn arrays, methods for forming the same and antenna systems

The present invention discloses an radiation imaging system, comprising: an accelerator for generating rays which penetrate through the objects to be inspected and an synchronous signal; a detector with a plurality of detecting modules, adapted for detecting rays; a signal processor for generating a selection signal according to the synchronous signal, so as to select a detecting module for detecting the rays; a data converter for converting the signal detected by said detecting module into digital data, and then buffering the digital data in said signal processor; and a communication controller connected to an image processor, adapted for transmitting the digital data buffered in said signal processor to said image processor. The system according to the present invention allows high-speed and stable data acquisition and data conversion and accurate and reliable data transmission, when the data amount is significant.

Radiation imaging system

Growing community of inventors

Beijing, China

Wenguo Liu