Table of Content

25 June 2019, Volume 39 Issue 3

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Research on In-situ Thickness Measurement of Atomic Layer #br# Deposition Nano-Passivation Layers

LI Jian-guo；HUI Long-fei；QIN Li-jun；GONG Ting；ZHANG Wang-le

2019, 39(3):  1-6.  doi:10.12060/j.issn.1000-7202.2019.03.01

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Atomic layer deposition of inorganic nano-film technology is widely used in military and civilian applications.In this paper,the in-situ quartz crystal microbalance measurement system was used to study the growth process of atomic layer deposition inorganic film,and the film thickness was measured by quartz crystal microbalance.By studying the atomic layer deposition reaction conditions,the in-situ measurement results of the inorganic film thickness of the atomic layer deposition are used instead of the optical measurement results of the film thickness.It can solve the problem that the thickness of the atomic layer deposited film in various complex chambers cannot be accurately measured.

Research on Acoustic Field Measurement Technology and Simulation of Transducers based on Laser Reflection Tomography

WANG Wei-yin；CHEN Yi；WANG Shi-quan；YANG Liu-qing

2019, 39(3):  7-12.  doi:10.12060/j.issn.1000-7202.2019.03.02

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The radiation acoustic field distribution of the transducer can reflect the acoustic performance of the transducer directly.It will affect the diagnosis and evaluation of the transducer if the radiation acoustic field of the transducer cannot be measured accurately.The theoretical formula for reconstructing the radiation acoustic field of the transducer by laser reflection tomography is deduced from the perspective of theoretical simulation.And the theoretical calculation of the laser reflection tomography is carried out by using the derived theoretical formula.The result shows that the laser reflection tomography can reconstruct the radiation acoustic field distribution of the transducer and the acoustic pressure in the acoustic field accurately,which provides a feasible method for the acoustic field reconstruction and acoustic pressure measurement of the transducer.

Research on Optoelectronic Technique for Transient Response Calibration of Sampling Oscilloscopes

LIU Shuang；CHEN Bei；XIE Wen；GONG Peng-wei；JIANG He；MA Hong-mei；YANG Chun-tao

2019, 39(3):  13-16.  doi:10.12060/j.issn.1000-7202.2019.03.03

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An optoelectronic technique for transient response calibration of sampling oscilloscopes is proposed.It is based on the femtosecond laser and photoconductive switch theory,and can realize the generation and detection of ultrafast voltage pulses,which serve as calibration signal for sampling oscilloscopes.After the processing such as time base correction,jitter correction and deconvolution,the transient response of sampling oscilloscopes can be calibrated.Furthermore,this technique could get the complete impulse response and step response of sampling oscilloscopes and would be of great significance.

Estimation on Quality Parameter of Micron-level Grids Pattern Standard Sample

XU Xiao-qing；LI Suo-yin；ZHAO Lin；ZHANG Xiao-dong

2019, 39(3):  17-21.  doi:10.12060/j.issn.1000-7202.2019.03.04

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The paper discussed the method of evaluating the quality parameters of micron-level grids pattern standard samples using CD-SEM as the core equipment.It gave an example to measure the quality parameters in different material and different height with nominal pitches of 3μm,and comparative analyzed the relative factors of the experimental data.Combined with the analysis,it provided a theoretical reference for producing high-quality micron-level grids pattern standard sample.The analysis results show that the method described in this paper is suitable for evaluating the quality parameters of micron-level grids pattern standard samples.

Structure Design and Performance Study of the Co-conical TEM Cell

HUANG Cheng-zu；QI Wan-quan；LIU Xing-xun；PENG Bo

2019, 39(3):  22-26.  doi:10.12060/j.issn.1000-7202.2019.03.05

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This paper develops a co-conical TEM cell to solve the problem about broadband frequency field strength calibration of the field probes.The system can achieve the frequency response and linearity response calibration of the field probes from 200MHz to 40GHz and from 1V/m to 200V/m.This technique lays a foundation for broadband frequency and large dynamic field strength calibration.The mainly research works of this paper are topdown structure design of the co-conical TEM cell and experimental verification of the electrical properties.

Research on Calibration of Multi-Harmonic Tuner

HUO Ye；WU Ai-hua；LIANG Fa-guo；LUAN Peng；WANG Yi-bang；LIU Chen

2019, 39(3):  27-32.  doi:10.12060/j.issn.1000-7202.2019.03.06

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As an important device in load pull measurement system,the application of Multi-Harmonic Tuner is more and more extensive,however,the calibration of the instrument has not been reported.This paper designed a calibration scheme based on the Multi-Harmonic Tuner,three definitions of vector repeatability were emphatically analyzed,the most reasonable calibration scheme was defined.The feasibility of the calibration scheme was verified by comparing with the factory test data.

Evaluation of Measurement Uncertainty of AC Resistance Calibration #br# Device based on Single Quadrature Bridge

LI Ya-lu；ZHANG Guo-qiang；HU Zhi-yuan

2019, 39(3):  33-39.  doi:10.12060/j.issn.1000-7202.2019.03.07

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Based on the principle of single quadrature bridge,the digital quadrature bridge source is used as the output of the two-way quadrature voltage signal,for build the AC resistance calibration device.Via the equilibrium equation of the single quadrature bridge,the theoretical resistance of the pending AC resistance as a contract true value is calculated.In this paper,the measurement uncertainty of the AC resistance calibration device was evaluated based on a test point with a frequency of 1.591 55kHz,an amplitude effective value of 1V,a standard capacitor of 100nF and an AC resistance of 1kΩ.A mathematical model of the AC resistance based on the principle of single quadrature bridge is established,the source of measurement uncertainty is analyzed,and calculate the components of the standard uncertainty of the AC resistance.Finally,according to the measurement uncertainty propagation formula,the synthetic standard uncertainty is obtained,and the calibration result of the whole AC resistance calibration device is obtained by expanding the uncertainty.

Power Field Calibration Device for Laser Target Simulator

WU Hong-xia；DU Ji-dong；ZHANG Yu-guo；YANG Hai-long

2019, 39(3):  40-43.  doi:10.12060/j.issn.1000-7202.2019.03.08

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Laser detection equipment is widely used in precision pointing,acquisition and tracking systems.Many simulation tests are needed before it is put into use.Laser target simulator is a important simulation equipment used in laser detection equipment simulation test,but it has the characteristics of large size and difficult to carry.In this paper,a field power calibration device for laser target simulator is designed,which is composed of optical aperture,focusing optical system ,energy detection unit ,time domain detection unit,two-dimensional displacement mechanism,miniature turntable and control software.The calibration device can accurately and quickly calibrate the power stability and uniformity of the laser target simulator with 1.064μm and a peak power range of 10^-5 W～10^-1W.The uncertainty of power stability and uniformity measurement is less than 8%.Thus provides measurement guarantee for laser target simulator.

Designing of (70~100)MeV Quasi Mono-energetic Neutron Reference Fields

LI Wei；LI Li-hua；JIAO Ting-yu；XIA Li；LI Chun-juan；SHI Bin；LI Xiao-bo；LIU Yi-na；LIU Yun-tao

2019, 39(3):  44-50.  doi:10.12060/j.issn.1000-7202.2019.03.09

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144keV~15MeV mono-energetic reference fields based on tandem accelerator have been established in China.The calibration of neutron detector and traceability of neutron fluence and dosimetry have been realized below 20MeV.But there are no quasi mono-energetic reference fields above 20MeV in China.With the developments of neutron detector for space radiation and the developments of high energy proton accelerators,the needs for neutron reference fields above 20MeV are more and more intense.Being established of quasi mono-energetic neutron reference fields above 20MeV is very important for resolving defense industry needs and pushing development of neutron metrology.

Research on the Application of Artificial Intelligence to Dynamic #br# Calibration Technology with Vector Thrust

HUANG Xiang-hua；IANG Feng；YANG Shui-wang；SONG Zhi-qiang；LU Ning；LI Qi-ming

2019, 39(3):  51-57.  doi:10.12060/j.issn.1000-7202.2019.03.10

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Based on the calibration requirement of vector thrust field dynamic for aerospace engineering,a calibr-ation system for calibrating vector thrust test cell is introduced,using pendulum bob as the power source.In case of limited calibration points,artificial intelligence RBF neural network is applied in the calibration work to calibrate and compensate the dynamic characteristics of vector thrust.The verification result shows that the calibration systems dynamic property is excellent good.It can meet the calibration need of vector thrust，and provides a basis for the further accurate measurement of vector thrust.

Verification of Hydrophone Calibration using Optical Method and #br# Reciprocal Method in the Frequency Range 100kHz to 1MHz

WANG Shi-quan

2019, 39(3):  58-62.  doi:10.12060/j.issn.1000-7202.2019.03.11

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It is an absolute calibration method to calibrate the sensitivity of a hydrophone using the optical method.The paper described the calibration principle and the system constitution of the underwater pressure calibration facility using the laser vibrometry.The experiments were performed for the TC4034 and BK8103 hydrophone calibration in the frequency range 100kHz to 1MHz.The measurement uncertainty of the facility was evaluated.The calibration results using the optical method were compared with the results which used three-transducers reciprocal method.It showed that the results were in good agreements generally.The maximum discrepancy between the two methods was less than the combined measurement uncertainty of the two calibration facilities.The possible reasons which caused the discrepancies were discussed.

Wall Penetration Loss Correction based on Indoor Wireless Propagation Model

ZHAO Ya-nan；YAN Tian-feng；WU Zhong-dong；GAO Rui

2019, 39(3):  63-67.  doi:10.12060/j.issn.1000-7202.2019.03.12

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K-M(Keenan-Motley)model adds the loss of the single wall to calculate the total loss of indoor wireless signal penetrating multiple walls,which exists errors .To solve this problem,a variety of indoor scenes are selected for CW (Continuous Wave)tests,and the influence factors and changing rules of wireless signal through the wall loss are analyzed.An indoor wireless model through the wall loss correction method based on artificial neural network is proposed.The test data are trained and then the prediction model is established.The experimental results show that the predicted model conforms to the model correction criterion and has good prediction accuracy in the actual indoor scenarios.

Analysis and Solution of Electromagnetic Emission Interference for a #br# Certain Type of Control Equipment

HOU Yan-chun；ZHANG Qian；SHI Yan-chao；YANG Xue；CHEN Si-yang

2019, 39(3):  68-72.  doi:10.12060/j.issn.1000-7202.2019.03.13

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The problem that the amounts of electromagnetic emission exceed the limit line demand on standard is discussed in this paper.The causes of the conducted emission and radiated emission are introduced firstly,then how to find out the source of interference and the methods of EMC harden are explained.Applying above analysis and modified method to a certain type of control equipment,the source of interference could be gotten.According to the characteristics of the source,the methods of adding cable shield and filter on the port of power have been used.And the test result indicates the feasibility and validity of the method.The amounts of electromagnetic emission could be reduced effectively.At the same time,the method could be useful for electrical equipment design on EMC and passing the electromagnetic emission measurement.

Research on Information Security Performance Measurement System

DONG Yi-bing；ZHANG Lin-shan

2019, 39(3):  73-78.  doi:10.12060/j.issn.1000-7202.2019.03.14

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Performance management refers to the continuous cycle of performance planning,performance counseling and communication,performance appraisal,application of performance results and improvement of performance objectives,in which managers and employees at all levels participate to achieve organizational goals.The purpose of performance management is to continuously improve the performance of individuals,departments and organizations.While a good performance management system can stimulate the enthusiasm and creativity of employees and managers,spontaneously improve the process to accomplish organizational goals,and improve the efficiency and effectiveness of achieving goals;a poor performance management system to a certain organization may bring huge negative impact.Information security management is an important part of organizational management.Based on information security performance management,this paper focuses on the development of information security performance plan by combining the relevant international and domestic standards,and analyses the design method of information security performance measurement system and shares the design ideas.

An Image Processing Algorithm about Aperture Synthesis Microwave Radiometer

CHEN Hai-jian；DING Xiao-yong；WANG Rui

2019, 39(3):  79-84.  doi:10.12060/j.issn.1000-7202.2019.03.15

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Aperture synthesis image is a base theory of interferometer.Base on interferometer measurements result,using inverse Fourier transform get the bright temperature distribution of scene.Using wavelet enhancement denoising algorithm and process the image in time domain and frequency domain.Enhance demand information and suppress unnecessary information,attaches a specific window function to filter clutter,improve clarity and smoothness about the microwave radiometer.Using blind uncoiling lorantzian super resolution algorithm to improve imaging resolution,well done the contradiction of antenna port face and resolution.

Research on Simulation Technology of Intermittent Illumination #br# Radar Signal based on MATLAB

REN Li-li；XU Hai-yan

2019, 39(3):  85-89.  doi:10.12060/j.issn.1000-7202.2019.03.16

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Aiming at the problem of modulation that there is no actual radar in the process of analyzing the signal quality of the intermittent irradiation radar,this paper puts forward a method of simulating radar waveform with arbitrary waveform generator and microwave signal source according to the principle of generating complex intermittent irradiation radar signal.Based on software radio technology,it gives a concrete implementation plan of simulating complex baseband modulated signal with MATLAB software and importing it into arbitrary waveform generator.By adopting the signal simulation method designed by the scheme,the generated signal covers rich contents such as modulation subcarrier parameters,pulse synchronization signals,coding information and so on.It can solve the problem of acquiring complex intermittent illumination radar signals in a laboratory environment.The experimental results show the simulation signal scheme has the characteristics of good universality and is easy to implement,which can provide methods for complex modulation signals generating in the same signal system,and reduce the test cost.

Research on Dynamic Positioning Accuracy Test Method of Satellite #br# Navigation Terminal Equipment under Real Satellite Signal

LI Zhen；CHEN Xue-jun；JIAO Yue；SUN Hong-jun；ZHAO Hang

2019, 39(3):  90-96.  doi:10.12060/j.issn.1000-7202.2019.03.17

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Test technology of global satellite navigation terminals is divided into indoor simulation test and actual signal test.Signal of the indoor simulation test is quite different from environment where devices are deployed,and cannot fully reflect practical performance.Cost of actual signal test is high and the test cannot be repeated.A novel test method of satellite navigation terminal,which can complete the practical performance test of the navigation terminal products effectively by collecting the actual signal and replaying it in the same environment,is delivered in this work.Based on the GNSS signal record and playback equipment,a dynamic running vehicle testing system is set up,consisting of a test car,a RTK base station,a RTK mobile station receiver,an inertial navigation unit,and a navigation antenna.The proposed system collects actual signal and replays it in the microwave dark room,to test positioning rate accuracy and location data availability index of receivers.The reference for product stereotype and performance comparison is then provided.

Efficiency Calibration and Key Radionuclides Determination for #br# On-line Fuel-rod Failure Monitor of LaBr₃(Ce)

GUO Xiao-qing；CHEN Xi-lin；QIN Guo-xiu；XIA Wen；DIAO Li-jun

2019, 39(3):  97-104.  doi:10.12060/j.issn.1000-7202.2019.03.18

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The method of common fuel failure on-line monitoring is greatly influenced by external factors,but the online quantitative analysis with specific activity of key fission product nuclide in γ energy spectrum is a reliable fuel failure method.In this paper,for LaBr₃ (Ce) of a new type monitor,a fuel failure simulation experiment was designed,and the escape fission products was analyzed using HPGe and LaBr₃ Ce) detectors respectively.Through the nuclide analysis results at different cooling time,it was determined the¹³⁵Xe,⁸⁸Kr,¹³⁸Xe,⁸⁸Rb,¹³⁸Cs and so on can be used as the key nuclides for γ energy spectrum method of LaBr₃ (Ce).At the same time,four groups of radioactive standard solutions including ⁶⁰Co,¹³⁷Cs,¹³³Ba,²⁴¹Am,¹⁵²Eu,¹⁰⁹Cd,⁸⁸Y,⁵⁷Co and ²⁴Na were prepared,the energy range was 250keV to 2400keV,The efficiency of LaBr₃ (Ce) online monitor was calibrated on the established solution circulation calibration device.Finally,in an abnormal situation of reactor,The results of the calibrated LaBr₃ (Ce) are in agreement with the results of sampling analysis of the HPGe spectrometer.It indicated that the efficiency calibration result is accurate and the calibration method is reliable.