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徐春广

  • 职称:教授
  • 研究方向:感知与测控技术,先进传动与控制
  • 所属院系:机械与车辆学院  
  • 成果数量:363条,属于本单位的个人成果363条
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作者: Weibin Li1,*;Chunguang Xu2;Younho Cho3,* (1School of Aerospace Engineering, Xiamen University, Xiamen 361005, China2School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100041, China Email: nc.ude.tib@gcux3School of Mechanical Engineering, Pusan National University, Busan 609-735, Korea)

出处: Sensors (Basel) 2016 Vol.16No.2

关键词: Lamb waves;composite laminates;degradation progressive;moisture diffusion;thermal fatigue

摘要: Laminate composites which are widely used in the aeronautical industry, are usually subjected to frequency variation of environmental temperature and ...

发明人: 徐春广,王俊峰,李焕新,白晓光,田海兵,宋剑锋,吕卓,肖定国,潘勤学

申请人: 北京理工大学

申请号: 201610009044.X

申请日期: 2016.01.06

摘要: 本发明涉及一种扭转残余应力超声无损检测方法,超声纵波通过一次波形转换在轴的扭转面上形成临界折射纵波,测出临界折射纵波在轴中传播的时间,由声弹性理论便可计算出相应的扭转残余应力。而且通过改变超声纵波的频率还可以测出同一扭转面上不同深度下的扭转残余应力。该技术发明可以有效地解决不同角度扭转面上扭转残余应 ...

作者: Song, WT (Song Wentao)[ 1,2 ] ; Xu, CG (Xu Chunguang)[ 1 ] ; Pan, QX (Pan Qinxue)[ 1 ] ; Song, JF (Song Jianfeng)[ 1 ] ([ 1 ] Beijing Inst Technol, Sch Mech Engn, Beijing 100081, Peoples R China Beijing Institute of Technology [ 2 ] Shijiazhuang Tiedao Univ, Sch Mech Engn, Shijiazhuang 050043, Peoples R China Shijiazhuang Tiedao University)

出处: CHINESE JOURNAL OF MECHANICAL ENGINEERING 2016 Vol.29No.2 P365-371

关键词: ultrasonic; nondestructive testing; acoustoelasticity theory; residual stress field; stress gradient; ultrasonic characterization

摘要: To address the difficulty in testing and calibrating the stress gradient in the depth direction of mechanical components, a new technology of nondestr ...

作者: Sensitivity is an important parameter to describe the electro-acoustic energy conversion efficiency of ultrasonic transducer. In this paper;the definition of sensitivity and reciprocity of ultrasonic transducer is studied. The frequency response function of a transducer is the spectrum of its sensitivity;which reflects the response sensitivity of the transducer for input signals at different frequencies. Four common methods which are used to measure the disc-vibrator transducer sensitivity are discussed in current investigation. The reciprocitymethod and the pulse-echo method are based on the reciprocity of the transducer. In the laser vibrometer method measurement;the normal velocity on the transducer radiating surface is directly measured by a laser vibrometer. In the measurement process of the hydrophone method;a calibrated hydrophone is used to measure the transmitted field. The validity of these methods is checked by experimental test. All of the four methods described are sufficiently accurate for transducer sensitivity measurement;while each method has its advantages and limitations. In practical applications;the appropriate method to measure transducer sensitivity should be selected based on actual conditions. (1School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China; Key Laboratory of Fundamental Science for Advanced Machining, Beijing Institute of Technology, Beijing, China.2School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China; China Ship Development and Design Center, Wuhan, China.)

出处: Ultrasonics 2016 Vol.68 P150-154

关键词: Frequency response function;Reciprocity;Sensitivity;Ultrasonic transducer

摘要: Sensitivity is an important parameter to describe the electro-acoustic energy conversion efficiency of ultrasonic transducer. In this paper, the defin ...

作者: Yan, Hongjuan(1,2); Xu, Chunguang(2); Xiao, Dingguo(2); Cai, Haichao(2) ((1) College of Mechanical and Materials Engineering, North China University of Technology, Beijing; 100144, China; (2) School of Mechanical Engineering, Beijing Institute of Technology, Beijing; 100081, China)

出处: Jixie Gongcheng Xuebao/Journal of Mechanical Engineering 2016 Vol.52No.6 P22-29

关键词: Alloy steel - Aluminum - Aluminum alloys - Perturbation techniques - Ultrasonic applications - Yield stress

摘要: Assuming small strain condition, perturbation method is used to resolve one dimensional wave equation. The nonlinear wave rule is studied when ultraso ...

作者: Zongxing Lu;Chunguang Xu;Qinxue Pan;Dingguo Xiao;Fanwu Meng;Juan Hao (Beijing Institute of Technology;Beijing Institute of Technology;Beijing Institute of Technology;Beijing Institute of Technology;Beijing Institute of Technology,;Beijing Institute of Technology,)

出处: Industrial Robot: An International Journal 2016 Vol.43No.2

摘要: Purpose Nondestructive testing based on cooperative twin-robot technology is a significant issue for curved-surface inspection. To achieve this purpos ...

发明人: 徐春广,肖振,肖定国,刘方芳,孟凡武,印明哲

申请人: 北京理工大学

申请号: 201510040979.X

申请日期: 2015.01.27

摘要: 本发明提供一种单机械手超声无损检测装置及方法,能对具有复杂曲面特征的工件缺陷进行精确的自动化无损检测。其包括:工控机;机械手扫查机构,包括一个机械手和机械手控制器,机械手和机械手控制器连接和通讯,机械手控制器与工控机连接和通讯,机械手用于夹持被测件;水槽,其内部收容作为耦合剂的水;超声收发机构,包括 ...

发明人: 孟凡武,贺亚洲,徐春广,刘方芳,郝娟,刘帅

申请人: 北京理工大学

申请号: 201510197011.8

申请日期: 2015.04.23

摘要: 本发明公开了一种回转体零件廓形的特征点提取及自动分段方法,本发明利用传感器对回转体进行扫描,并等间隔均匀采样;利用采样数据,在2n+1曲率计算方法中对得到的回转体各个采样点的曲率进行计算,得到回转体各个采样点变形后的曲率,将近似变形后的曲率值大于设定阀值的点作为回转体的特征点,提取特征点并进行分段, ...

发明人: 徐春广,杨柳,朱延玲,杨超

申请人: 北京理工大学

申请号: 201510182438.0

申请日期: 2015.04.17

摘要: 本发明涉及一种适用于弱散射介质的超声慢度差层析算法,该方法使用有无被测物存在时声波路径上的慢度差值进行代数迭代,获取弱散射介质的重建图像。将环形阵列浸于耦合介质中,在不存在被测物的情况下,采用单个超声换能器发射脉冲声波,同时用发射换能器对侧的换能器接收声波,完成一次数据采集。之后顺次更换发射换能器并 ...

发明人: 孟凡武,印明哲,肖定国,刘方芳,徐春广

申请人: 北京理工大学

申请号: 201510254993.X

申请日期: 2015.05.19

摘要: 本发明公开了一种基于超声换能器标定的机械手定位方法、系统及标定工具,通过设计与机械手固连的标定工具,控制机械手的运动,使得超声换能器声波打在目标位置,从而对超声换能器进行定位,获得超声换能器相对于机械手基座的坐标,对超声换能器进行定位,提高了超声换能器定位的便捷性和精确度,同时很大程度上减少了人力的 ...

徐春广教授简介