Tsinghua University

Xiaojing Guo

Jian Zheng

Liqiang Wang

Jigang An

Zhentao Wang

Chunming Tan

Yibin Huang

Litao Li

Ximing Liu

Xincheng Xiang

Zhifang Wu

Guilai Xing

Yanmin Zhang

Peng Cong

Jianmin Tong

Weidong Qiu

Yuai Zhang

Jichen Miao

The present disclosure relates to a technical field of a security detection device, and particularly, to a security detection system, comprising one or more detection devices, wherein the detection device comprises a first ray emitter, a ray receiver, and a movable frame, wherein the first ray emitter comprises a first ray source for generating first detection rays and is provided at a bottom portion of the movable frame, so that the first detection rays can penetrate through a detected object from a bottom of the detected object; the ray receiver comprises a ray detector provided on the movable frame, for correspondingly receiving the first detection rays having penetrated through the detected object; and the movable frame is movable in a direction in which the first ray emitter and the ray receiver are capable of moving through a detection region for the detected object.

Security detection system

The invention relates to a device for detecting the thickness and crown of plates and strips, belonging to the field of nuclear technology applications. The device comprises a C-frame; two ray source mounted in an upper arm of the C-frame and distributed at an interval along the width direction of a steel plate/strip; two rows of gas-pressurized ionization chamber detector arrays mounted in a lower arm of the C-frame and distributed at an interval along the moving direction of the plate/strip; collimators mounted below the two ray source, the collimators enabling the rays of each ray source to only irradiate to a corresponding row of detectors; pre-amplifier modules connected with the detector arrays; a data collector connected with the pre-amplifier modules; a data processing and displaying computer connected with the data collector; and a cooling water and pressurized air service system and a control system for ensuring system operation and monitoring. The device of the invention is simple in structure and high in dynamic measurement accuracy, and the detectors have the advantages of small temperature drift, irradiation resistance, high spatial resolution, high cost performance and the like.

Thickness and convexity detection device for plate strip

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Beijing, China

Xiaojing Guo