公开(公告)号：EP3796049A1

公开(公告)日：2021-03-24

申请号：EP20187211.6

申请日：2020-07-22

申请人： Tsinghua University ,  Nuctech Company Limited

发明人： ZENG, Zhi ,  PAN, Xingyu ,  WANG, Xuewu ,  LI, Jungli ,  ZENG, Ming ,  LI, Jianmin ,  ZHAO, Ziran ,  CHENG, Jianping ,  MA, Hao ,  ZHANG, Hui ,  YU, Hao ,  LIU, Bicheng

IPC分类号： G01V5/00 ,  G01N23/20

摘要： The present disclosure provides a substance identification device and a substance identification method. The substance identification device comprises: a classifier establishing unit (10) configured to establish a classifier based on scattering density values reconstructed for a plurality of known sample materials, wherein the classifier comprises a plurality of feature regions corresponding to a plurality of characteristic parameters for the plurality of known sample materials, respectively; and an identification unit (20) for a material to be tested, configured to match the characteristic parameter of the material to be tested with the classifier, and to identify a type of the material to be tested by obtaining a feature region corresponding to the characteristic parameter of the material to be tested.

公开(公告)号：EP3605806A1

公开(公告)日：2020-02-05

申请号：EP17933001.4

申请日：2017-12-04

申请人： Tsinghua University

发明人： YE, Peiqing ,  ZHANG, Luhong ,  ZHANG, Hui

IPC分类号： H02K11/22

摘要： Disclosed is a dual-sensing feedback and transmission system for a linear motor, belonging to the technical field of medical equipment and motors. The system includes a linear motor, a transmission mechanism, and a dual-sensing displacement detection mechanism. One end of the transmission mechanism is fixedly connected to a mover (7) of the linear motor, and the other end thereof is located outside a stator (6) of the linear motor and fixedly connected to a leaf (1) of a multi-leaf collimator directly or by means of a connecting block (2). The dual-sensing displacement detection mechanism is a dual-sensing linear displacement sensor, and includes two sets of reading devices (5) for reading displacement information, and a matching reference ruler (4). The reading devices (5) are fixed to an end or exterior of a casing of the stator (6) of the linear motor close to the leaf (1) of the multi-leaf collimator. The reference ruler (4) is fixed onto a connecting rod (3). The technical solution is used to drive the leaf (1) of the multi-leaf collimator in radiotherapy equipment and feed position information of the leaf (1) of the multi-leaf collimator. Thus, the integration of structural functions of mechanical transmission and position detection can be realized, and the narrow installation space requirements and the dual-sensing requirements of Class III medical instruments can be satisfied.