Table of Content

25 August 2018, Volume 38 Issue 4

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Design and Implementation of Optoelectronic Electronic Level

WANG Kai-lei；LIU Sha；WANG Chun-xi；GAO Qiu-juan

2018, 38(4):  1-6.  doi:10.12060/j.issn.1000-7202.2018.04.01

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The design method of a photoelectric electronic level is introduced，using the CCD sensor sensitive iol surface to establish a horizontal datum, and through the computer system to realize the acquisition and processing of photoelectrical signals Through the analysis of the principle of photoelectric level measurement，the overall technical realization of photoelectric electronic level is expounded in detail. The hardware technology and the software technology are realized，and the principle prototype of the photoelectric electronic level is completed，the technology index is tested，the expected effect is achieved. This optoelectronic electronic level has the engineering application value.

Analysis of Position Precision Measurement Method for Large Cabin Threaded Hole

NI Ai-jing；GUO Qing；ZHAO Jie；YU Wang-zhu；CAI Zi-hui；YANG Chun

2018, 38(4):  7-11.  doi:10.12060/j.issn.1000-7202.2018.04.02

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Through threaded hole measurement test, the position deviation between unthreaded hole and threaded hole based on coordinate measuring machine(CMM) is obtained, the threaded hole position deviation between laser tracker measurement and CMM measurement is obtained too. Besides,the relation between position precision and axes perpendicularity relative to end face is analyzed, clearance value of thread fit is measured also. The results show that, the threaded hole position deviation between laser tracker measurement and CMM measurement is small,the maximum deviation between unthreaded hole and threaded hole based on measuring screw is 0.2mm, the nonperpendicularity of threaded hole is a factor which caused this deviation .The deviation has little effect on thread hole usage, because of the uncertainty and tolerance of thread fit.

Study on Azimuth Attitude of Stand-by Heat State Aircraft in Outdoor for Long Hours

LIU Kai；ZHAO Tiancheng；ZHANG Jie；ZHOU Jun；WANG Chuixi；SHA Chunzhe

2018, 38(4):  12-17.  doi:10.12060/j.issn.1000-7202.2018.04.03

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The azimuth attitude change of aircraft in outdoor caused by temperature in long hours of stand-by heat state is researched by using  high precision photoelectric autocollimator, and corrected by theodolite and pole instrument.Some temperature sensors are fixed on aircraft, and a new relationship between them is excogitated by data analysis in industrial computer，this conclusion can provide theory references for aircraft launch technology.

Research on Temperature Field Measurement Technology Based on Medium-wave Infrared Thermal Imaging

FU Qiang；HE Suo-chun；DONG Fei；ZHOU Yang；LIU Han

2018, 38(4):  18-22.  doi:10.12060/j.issn.1000-7202.2018.04.04

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With the development of infrared detector technology, temperature measurement technology based on medium-wave infrared thermal imaging has been more widely used. Based on the study of temperature measurement principle with medium-wave infrared imaging system, the blackbody radiation calibration method and the impact of environmental radiation and calibration data processing method for temperature measurement accuracy are discussed. Then a series of treatment methods to implement a kind of temperature field measurement solution based on medium-wave infrared imaging is put forward, which well compensated the effects of environmental radiation on the measurement results, meanwhile reduced the calibration data fitting errors. The accuracy of temperature measurement is well improved.

Study of the Laser Absorption Radiation Thermometry

WANG Kuo-chuan；ZHANG Jun-qi；ZHANG Qi

2018, 38(4):  23-27.  doi:10.12060/j.issn.1000-7202.2018.04.05

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The radiation temperature measurement technology is reviewed, the main problems encountered in the radiation temperature measurement are summarized, the development status of the laser absorption method is introduced, the theoretical model of the laser absorption method is derived, and the experimental equipment and the results of the temperature measurement set up in this unit are introduced.

Performance Study of Miniature Magnetic Sector Mass Spectrometer

DONG Meng；CHENG Yong-jun；SUN Wen-jun；GUO Mei-ru；LI Gang；LI Ya-li；HAN Xiao-dong

2018, 38(4):  28-31.  doi:10.12060/j.issn.1000-7202.2018.04.06

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A new Miniature Magnetic Sector Mass Spectrometer has been developed. The key performance indexes of the instrument were tested and compared including mass range, resolution, sensitivity and the minimum detectable partial pressure. The result shows that the mass spectrometer can record mass range from 1 to 143 amu. The instrument provides resolving power of about 1400 at full width half maximum (FWHM) and demonstrates an sensitivity of 4.2×10^-5 A/Pa for nitrogen. And the minimum detectable partial pressure is measured to be 9.5×10^-7 Pa. The results lay a solid foundation for the further performance improvement of magnetic sector mass spectrometer in the future.

Study of heavy Gas Flow Calibration Technology of  High Pressure Orifice Plate

WANG Hui-long；SUN Feng-ju；ZHANG Yu；WANG Xiao-san；JIAO Xin-xin

2018, 38(4):  32-35.  doi:10.12060/j.issn.1000-7202.2018.04.07

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A kind of large gas flow calibration facility of high pressure orifice plate has been developed to calibrate the flow coefficient of high pressure Orifice plates in pressurization system. It can calibrate the gas flow of 30 MPa and the most mass flow of 18000kg/h (N₂), the uncertainty is 0.5% (k=2).

Review of Indirect Micro Thrust Measurements and Analysis of Key Issues

WANG Da-peng；JIN Xing；ZHOU Wei-jing；LI Nan-lei；WANG Qin；WANG Jian-bo

2018, 38(4):  36-42.  doi:10.12060/j.issn.1000-7202.2018.04.08

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Indirect method is one of the important methods for thrust measurement of space borne micro-thrusters.The current indirect measurement structures were divided into three basic dynamic configurations, namely, pendulum type, elastic disk type and cantilever beam type. The present research situation of these three structures at home and abroad were summarized, and the measurement principle and measurement characteristics were compared and analyzed. It was pointed out that measurement theory model, high precision parameter calibration and displacement measurement are the key problems in measurement.The corresponding solutions to the key problems were briefly described. At last, it was pointed out that the proper way to study dynamic thrust measurement method and the relationship between the measured impact force of the jet plume with the actual thrust are the key problems that need to be solved further.

Research of Friction Torque Compensation of Turntable Based on Model Reference Fuzzy Adaptive Method

JIANG Yun-xiang；WANG Chun-xi；MA Ling；CA0 Xue-li；WANG Mao；ZHAO Jian

2018, 38(4):  43-48.  doi:10.12060/j.issn.1000-7202.2018.04.09

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In order to restrain the significant low-speed "crawling" phenomenon caused by friction torque disturbance of servo turntable, a method of friction compensation based on model reference fuzzy adaptiveness was proposed. Based on the mathematic model, the friction compensation method is proved by the Lyapunov stabilization control theory and the simulation test is carried out by MATLAB. The simulation results show that the friction compensation method can effectively restrain the adverse effect of friction interference and improve the smoothness of low speed tracking of turntable, thus greatly improving  the low-speed servo accuracy of the turntable.

A Method for Zero Point Identifying and Processing Based on Phase Difference in the Measurement of Shaft Torque

LIU Xiang；HUANG Wen-ping；NIU Hui-ping；CAI Ping

2018, 38(4):  49-54.  doi:10.12060/j.issn.1000-7202.2018.04.10

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An identifying and processing method of zero point based on phase difference in the measurement of shaft torque was proposed.In this method, standard sinusoidal signals were generated by two reflective laser probes and the color code.By simultaneous sampling and amplitude normalization, the instantaneous phase difference between two signals was obtained. Then the torque load of the shaft was measured based on phase difference, realizing the zero correction which is difficult under static conditions by using pulse signals. After analyzing the key technologies and parameters of the system, the proposed method in this paper was examined by simulation and experiment, respectively. Both simulated and experimental results show that zero position can be accurately determined by this method without rotating the shaft, which can greatly reduce application requirements in the field.

Research of a Dynamic Angular Measurement Based on IK220 Board Real-time Locking Stored

WANG Yu-feng；ZHANG Xin-lei；GAO Yang；ZHANG Gong

2018, 38(4):  55-59.  doi:10.12060/j.issn.1000-7202.2018.04.11

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The measurement principle of turntable and method of IK220 interface card have been introduced, a new method of dynamic angular measurement  has been proposed, in VC6.0 compiler software environment, dynamic measurement′s real-time test software of turntable has been designed and implemented. Experiments show that the dynamic measurement realtime test software of turntable of based on IK220 when the turntable velocity less higher, the actual test results of axis turntable rate has reached the design index of the system, used conveniently, stably and reliably.


Research on Test Method for Perovskite Solar Cell Based on Solar Simulator

YANG Ai-jun

2018, 38(4):  60-66.  doi:10.12060/j.issn.1000-7202.2018.04.12

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Based on test method by using perovskite solar simulator, the study results are emphasized in this article in terms of how to determine conversion efficiency of perovskite solar cell, including performance of solar simulator, irradiance of light source, spectral mismatch, temperature of DUT (device under test), effective conversion area and set-up of I-V curve measurement, all of which combination is expected to characterize perovskite solar cell. Last but not least the measurement uncertainty of the test method is evaluated. This test method could be a solid reference for the professional institutes or research teams who dedicates to study on perovskite solar cell.

Ionospheric Delay Continuous Monitoring Based on BDS GEO Satellites Dual Frequency Observations

ZHAO Kun-juan；YANG Xu-hai；YANG Hai-yan；YAN Wen-he；LI Wei-chao

2018, 38(4):  67-72.  doi:10.12060/j.issn.1000-7202.2018.04.13

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A method for using observation data of BDS GEO satellites calculate ionospheric delay is proposed. Because GEO satellites working with fixed Ionospheric Pierce Point and stationary to the ground, it cannot take into account the spatial variation when uninterrupted monitoring the ionosphere change. B1&B2 dual-frequency combination is optimal through analysis of different combinations of BDS three frequencies pseudo-range and carrier-phase observation.Compared to other ionospheric model, carrier-phase smoothed pseudo-range calculation TEC can get high precision continuous monitoring results.

Structural Optimization and Dynamic Analysis of Single-direction Electro-permanent Magnetic Actuator

XU Bao-yu；LI Xiao-kun；HAO Xiao-ru；JIA Yan-yan；WANG Kun-long

2018, 38(4):  73-78.  doi:10.12060/j.issn.1000-7202.2018.04.14

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A new type of single-direction electro-permanent magnetic actuator was designed, with characteristics of low energy consumption, large electromagnetic attractive force, and fast response. The effects of actuator structure parameters such as the multiteeth structure, plane structure, and general structure of core, tilt angle of the core, and armature displacement on electromagnetic attractive force and response speed of actuator are studied by Finite Element Analysis (FEA). It was found that electromagnetic attractive force decreases with the increase of the armature displacement during the operation process of the actuator, the iron core with inclined angle structure can make the actuator to get the best performance, and the electromagnetic attractive force could get  maximum value 3071N when tilt angle of iron core is 50 °.

Comparative Research on Performance of Iron and Ironless Axial Flux Wind Generators

ZHU Jun；SONG Dan-dan；LI Shao-long；HAN Qiao-li；FENG Hai-chao；XU Xiao-zhuo

2018, 38(4):  79-85.  doi:10.12060/j.issn.1000-7202.2018.04.15

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Aiming at choosing the axial flux wind generators between iron and ironless which is more suitable for using in breeze areas, the efficiency and torque and power quality for the two kinds of generators were compared and analyzed at different speeds. The 3D finite element model of iron generator and ironless generator were established through determining the basic parameters of generator to compare their operation characteristics, and then the calculation results of 3D finite element were verified through the experimental platform.The results indicate that: under rated running state ,the efficiency of iron wind generator is 4.2% higher than ironless wind generator with the same amount of magnetic steel ,but there is cogging torque of core generator, so the running stability is poor.When the amount of magnetic steel and the number of armature winding turns are the same, the efficiency of ironless wind generator is 0.3% higher than iron wind generator with a smaller start torque.When the magnetic flux is the same, the efficiency of ironless wind generator is 5.7% higher than iron wind generator.Above all, ironless wind generator is more suitable in breeze areas for low speed operation.

Method Research of Analyzing Trace Gas Impurity Using Gas Chromatography

SHAN Jing；YIN Jie；WANG Wei-qing；TONG Wei；WU Peng

2018, 38(4):  86-89.  doi:10.12060/j.issn.1000-7202.2018.04.16

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To found a method of analyzing trace amount gas impurity in oxygen, the gas impurities of trace quantity in oxygen were analyzed using gas chromatography with the detector of ionizing hydrogen flames. The equipmental operation parameters of analyzing CO, CO₂ and C₂H₂ in oxygen were investigated, by which the method of analyzing trace amount gas impurity in oxygen was determined. The feasibility of the method was also verified in this way. The separation effect of trace impurity is excellent, whose contents are quantified with high precision using this method.

Research of Components in Rocket Kerosene by Comprehensive Two-Dimensional Gas Chromatography

REN Chun-bo；SHEN Zhao-xin；MA Chen-fei；WU Qing-yuan

2018, 38(4):  90-94.  doi:10.12060/j.issn.1000-7202.2018.04.17

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Two-dimensional gas chromatography combined with time of flight mass spectrometry and flame ionization detector were applied for quantitive and qualitative analysis of rocket kerosene. The relationships between group-type, carbon-number distribution and capability of rocket kerosene were investigated based on the experimental data. The results show that the rocket kerosene mainly comprises isoparaffins, cycloalkanes, bicyclic alkanes. Special composition made for high combustion value and excellent stability. This research results can be used for the analysis and optimization of rocket kerosene components.

Thinking on Promoting Advanced Space Metrological Guarantee System

LEI Lei；JIANG Xiao-yong；SONG Guo-jun

2018, 38(4):  95-97.  doi:10.12060/j.issn.1000-7202.2018.04.18

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The space metrological guarantee system of “four system one platform” has been  established to become an important technical foundation for the development and production of space weapon systems. The strategic development opportunities such as technological innovation and Civil-Military integration will be faced, and Space metrology will make full use of its own advantages and help escort the development of weapons and equipment and the development of national defense science and technology industry.

Research on the Metrological Guarantee Scheme of Equipment in the Development Stage

YANG Huan；YUAN Qian-chen；LIU Xiao-xu

2018, 38(4):  98-102.  doi:10.12060/j.issn.1000-7202.2018.04.19

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A submarine as an object, the method of formulating the metrological guarantee scheme in the stage of equipment development is studied, and the design basis and principle of the metrological guarantee scheme are elaborated. A specific design scheme, which is validated through the actual use of a model, is presented. The design is reasonable and feasible, the product works reliably, and all the performance indexes and quality characteristics meet the requirements.