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National Verification Regulations and Calibration Specifications of Measuring Instruments of P.R.China in 2009
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《China Standardization》 2009年第4期69-69,共1页
关键词 JJG National Verification Regulations and calibration Specifications of measuring Instruments of P.R.China in 2009
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National Verification Regulations and Calibration Specifications of Measuring Instruments of P.R.China in 2010(2010 No.131)
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《China Standardization》 2011年第1期80-80,共1页
General Administration of Quality Supervision,Inspection and Quarantine of P.R.China has approved the following 8 national measuring verification regulations in 2010 and publicize now.
关键词 National Verification Regulations and calibration Specifications of measuring Instruments of P.R.China in 2010 No.131
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National Verification Regulations and Calibration Specifications of Measuring Instruments of P.R.China in 2008 2008 NO.35
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《China Standardization》 2008年第6期63-63,共1页
General Administration of Quality Supervision,Inspection and Quarantine of P.R.China has approved the following 11 national measuring verification regulations in 2008 and publicize now.
关键词 National Verification Regulations and calibration Specifications of measuring Instruments of P.R.China in 2008 2008 NO.35 JJG NO
全文增补中
National Verification Regulations and Calibration Specifications of Measuring Instruments of P.R.China in 2008
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《China Standardization》 2008年第4期53-54,共2页
General Administration of Quality Supervision,Inspection and Quarantine of P.R.China hasapproved the following 24 national measuring verification regulations in 2008 and publicize now.
关键词 JJG National Verification Regulations and calibration Specifications of measuring Instruments of P.R.China in 2008
全文增补中
National Verification Regulations and Calibration Specifications of Measuring Instruments of P.R.China in 2008 2008 No.22
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《China Standardization》 2008年第3期54-54,共1页
General Administration of Quality Supervision,Inspection and Quarantine of P.R.China has approved the following 10 national measuring verification regulations in 2008 and publicize now.
关键词 JJG National Verification Regulations and calibration Specifications of measuring Instruments of P.R.China in 2008 2008 No.22
全文增补中
CALIBRATION OF A 6-DOF SPACE ROBOT USING GENETIC ALGORITHM 被引量:16
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作者 LIU Yu JIANG Yanshu +1 位作者 LIANG Bin XU Wenfu 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2008年第6期6-13,共8页
The kinematic error model of a 6-DOF space robot is deduced, and the cost function of kinematic parameter identification is built. With the aid of the genetic algorithm (GA) that has the powerful global adaptive pro... The kinematic error model of a 6-DOF space robot is deduced, and the cost function of kinematic parameter identification is built. With the aid of the genetic algorithm (GA) that has the powerful global adaptive probabilistic search ability, 24 parameters of the robot are identified through simulation, which makes the pose (position and orientation) accuracy of the robot a great improvement. In the process of the calibration, stochastic measurement noises are considered. Lastly, generalization of the identified kinematic parameters in the whole workspace of the robot is discussed. The simulation results show that calibrating the robot with GA is very stable and not sensitive to measurement noise. Moreover, even if the robot's kinematic parameters are relative, GA still has strong search ability to find the optimum solution. 展开更多
关键词 Robot calibration Position and orientation accuracy Measurement noises Genetic algorithm
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Error analysis and calibration for underwater sound intensity measuring system 被引量:6
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作者 HE Zuoyong HE Yuanan SHANG Dejiang (Institute of Underwater Acoustics, Harbin Engineering University Harbin 150001) 《Chinese Journal of Acoustics》 2000年第3期193-206,共14页
Based on measuring the cross-spectrum density of sound pressure between two hydrophones, the facility for underwater sound intensity measurement is investigated and designed. According to the principle of two-hydroph... Based on measuring the cross-spectrum density of sound pressure between two hydrophones, the facility for underwater sound intensity measurement is investigated and designed. According to the principle of two-hydrophone method for intensity measurement, the error analysis is carried out. Given the method of sound intensity measurement calibration for this underwater sound intensity measurement facility, the uncertainty of intensity measurement by this facility is evaluated. It is shown that the analysis and evaluation are agreeable to the experimental results. 展开更多
关键词 In Error analysis and calibration for underwater sound intensity measuring system
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Train probe for beam diagnostics of the SC200 superconducting cyclotron
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作者 Le-Xing Hu Kai-Zhong Ding +2 位作者 Yun-Tao Song Yu-Cheng Wu Kai Yao 《Nuclear Science and Techniques》 SCIE CAS CSCD 2020年第10期95-104,共10页
The SC200 proton therapy system commissioned by the Hefei CAS Ion Medical and Technical Devices Co.,Ltd.(HFCIM;Hefei,China)and the Joint Institute for Nuclear Research(JINR;Dubna,Russia)has made significant progress.A... The SC200 proton therapy system commissioned by the Hefei CAS Ion Medical and Technical Devices Co.,Ltd.(HFCIM;Hefei,China)and the Joint Institute for Nuclear Research(JINR;Dubna,Russia)has made significant progress.A main radial beam diagnostic system(MRBDS)equipped with a new type of train probe was developed to satisfy the requirements of beam diagnosis.In this paper,the detailed design of the mechanical structure and electronics system of the MRBDS is presented.The electronics system,which includes hardware and software components,was tested and calibrated.The results show that measurement errors can be significantly reduced by the designed calibration procedures.The repeatability of the mechanical structure was also verified,and the experimental results indicate that the unidirectional repeatability of the positioning is better than 0.3 mm.Finally,the MRBDS was used to measure the phase lag of the particles in the beam,and the results showed a high degree of agreement with theoretical calculations,which proved the applicability and high efficiency of the MRBDS. 展开更多
关键词 Train probe Beam diagnostic CYCLOTRON Measurement and calibration Commissioning
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A New Monocular Vision Measurement Method to Estimate 3D Positions of Objects on Floor 被引量:1
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作者 Ling-Yi Xu Zhi-Qiang Cao +1 位作者 Peng Zhao Chao Zhou 《International Journal of Automation and computing》 EI CSCD 2017年第2期159-168,共10页
A new visual measurement method is proposed to estimate three-dimensional (3D) position of the object on the floor based on a single camera. The camera fixed on a robot is in an inclined position with respect to the... A new visual measurement method is proposed to estimate three-dimensional (3D) position of the object on the floor based on a single camera. The camera fixed on a robot is in an inclined position with respect to the floor. A measurement model with the camera's extrinsic parameters such as the height and pitch angle is described. Single image of a chessboard pattern placed on the floor is enough to calibrate the camera's extrinsic parameters after the camera's intrinsic parameters are calibrated. Then the position of object on the floor can be computed with the measurement model. Furthermore, the height of object can be calculated with the paired-points in the vertical line sharing the same position on the floor. Compared to the conventional method used to estimate the positions on the plane, this method can obtain the 3D positions. The indoor experiment testifies the accuracy and validity of the proposed method. 展开更多
关键词 Visual measurement calibration localization position estimation monocular vision.
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