Table of Content

05 August 2020, Volume 40 Issue 4

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Review on the System Architecture of New Generation Wireless Sensor Network for Rocket

LUO Yu-bin, LI Hong, ZHOU Guang-ming, LU Juan

2020, 40(4):  1-6.  doi:10.12060/j.issn.1000-7202.2020.04.01

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Wireless sensor network technology is one of the key technologies in the new generation rocket measurement system. Based on a brief introduction of the existing wireless wireless sensor network applications, the technical characteristics of each existing system are analyzed and summarized, and EPSEN, the system architecture of new generation wireless sensor network for rocket, is proposed. In this architecture the design of communication protocol is explained in detail. The EPSEN architecture provides a reference for the improvement of existing on-board wireless sensor network systems and the development of future products, which can help the formation of industry standards.

Caliration of Fix-length Corner-cube Prism Length Standard

GUO Li-zhen, XIAO Xiao-ping, WANG Guang-ming, LIU Ke, WANG Xiao-guang, ZHU Hao

2020, 40(4):  13-17.  doi:10.12060/j.issn.1000-7202.2020.04.03

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Aiming at the calibration problem of the fixed-length standard composed of two pyramid prisms, a calibration method for the fixed-angle pyramid prism length standard is proposed. A method of direct aiming and quick adjustment of the optical apex of the pyramid prism is adopted to realize the quick aiming and positioning of the optical apex of the pyramid prism. With the three-way laser interference precision length measuring device, a calibration device for the length standard of the pyramid prism is built, and the aiming and calibration accuracy of the pyramid prism length standard is improved.

Research on the 10kN·m Torque Standard Equipment with Temperature Control System

Mei Hongwei , Yang Jin , Ni Jinquan, Li Tao

2020, 40(4):  18-25.  doi:10.12060/j.issn.1000-7202.2020.04.04

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The structure, function and design principle of the torque standard with temperature control system is introduced. Electrical performance of torque standard device with temperature control system is studied. The calibration of torque sensor under the actual changing temperature is realized, the problem of the static constant temperature calibration torque sensor used in the field variable temperature environment is solved, reliable standard device and quantity transfer means for the field quantity transfer of the torque is provided.

Measure Uncertainty Evaluation of One Rotation Torque Calibration Apparatus

CHEN Ming-lian, LI Jiang, NI Jin-quan, NI Xi-dong, LI Tao

2020, 40(4):  26-30.  doi:10.12060/j.issn.1000-7202.2020.04.05

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According to the torque calibration problem of rotational equipments, the rotational torque calibration apparatus including its configuration and control principle are studied. The detailed factors that affect the measurement uncertainty of rotational torque are analyzed based on the rotational torque measurement model. The uncertainty components are evaluated by various methods, which provide the fundamental to establish the rotational torque calibration specification for peer reference.

Evaluation of Measurement Uncertainty for the Surface Microphone Calibration System for Free Field

LiuXin, YangXiaowei, LuShuting, ZhuGang, BaiTian, WangHuilong

2020, 40(4):  31-34.  doi:10.12060/j.issn.1000-7202.2020.04.06

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A measurement method of the surface microphone for free field is described. The mathematic model of the surface microphone calibration system and evaluation of measurement uncertainty are analyzed. A real example for evaluation uncertainty is showed. The uncertainty of the calibration system is verified. The results are showed that the measurement uncertainty of the calibration system is reasonable and reliable.

Development of GCPW Calibration Standards Based 16-term Error Model method

ZHOU Rui, WANG Yi-bang, LIU Chen, LUAN Peng

2020, 40(4):  35-40.  doi:10.12060/j.issn.1000-7202.2020.04.07

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On-wafer-level 16-term error model calibration standards used for characterization of W-band circuits based on grounded coplanar waveguide (GCPW). These transistors were fabricated on thin gallium arsenide (GaAs) substrate with metal ground on the back, and via holes were utilized to ensure single mode propagation (i.e., eliminating the parallel-plate mode or surface mode). For accurate definition of the calibration standards, multiline thru-reflect-line (TRL) assistant standards were also fabricated on the same wafer and measured. Passive device was measured subject to both 16-term and commercial LRRM calibrations. Measurement results demonstrate that 16-term calibration standards are capable of determining the cross-talk more accurately. This cluster of work reveals that the proposed GCPW GaAs calibration substrate could be a feasible alternative to conventional CPW impedance standard substrates, for on-wafer measurements at W-band and above.

Research on Measurement Method and Device Development of Nozzle Angle Deviation based on Optical Autocollimation Principle

CHEN-Ping, LIU Wen-yi, SONG Qi-yu, ZHANG Li-na, JIANG Yun-xiang

2020, 40(4):  41-45.  doi:10.12060/j.issn.1000-7202.2020.04.08

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A method for measuring nozzle angle deviation based on the principle of optical autocollimation is proposed. The virtual nozzle axis is equivalently replaced by the normal of the target shaft end reflector, the engine nozzle reference hole axis space attitude had been rapidly achieved and accurately deviated. the quality consistency and reliability of parts, components assemblies could been Real-time guaranted. An automatic measuring deviation of multi nozzle is developed and verified by experiments, the results show that the measurement accuracy of the device is close to that of the CMM, which meets the analysis of measurement error and meets the requirements of application.

Research of the Temperature Compensation of Pressure Sensor based on MAX1452

LIU Yi, WU Jia-ling, WANG Guang-ming, WU Dong-jian

2020, 40(4):  46-53.  doi:10.12060/j.issn.1000-7202.2020.04.09

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A pressure transmitting and temperature drift compensation system is designed based on MAX1452.By establishing a mathematical model,the causes of temperature drift and the compensation mechanism are analyzed.The corresponding circuit and software system are designed.The correctness of the mathematical model and compensation mechanism is verified through experiments.The results show that the total error over the full temperature range after sensor compensation is increased by an order of magnitude.

Design of a Kind of Medium Power Microwave Calibration Device based on the Principle of Calorimetry

HAO Zhi-kun, WEN Shi-ren, WU Chun-chan, ZHANG Zheng-long, YANG Jing

2020, 40(4):  54-57.  doi:10.12060/j.issn.1000-7202.2020.04.10

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A kind of medium power microwave calibration device based on the principle of calorimetry is designed for space remote sensing and telemetry . The medium power microwave measurement device is tested and verified. The data of test result is analysed, the calibration device is conformed the design requirement.

Research and Implementation of DC-DC Converter Control Technology

ZHANG Ting, LIU Ya-qiang, WANG Zu-liang

2020, 40(4):  58-63.  doi:10.12060/j.issn.1000-7202.2020.04.11

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The input voltage will be disturbed when the DC-DC converter works at rated load.Similarly,the load resistance will be changed suddenly when it works at the rated input voltage.In order to achieve wide voltage input and ensure high input voltage regulation and load regulation of the converter,an automatic switching and control strategy are designed.According to the working characteristics of buck boost DC-DC converter,the time points of switch on and switch off are calculated,so that the switch action can be accurately controlled.Based on parallel operation and combinational logic,[JP3]the model is built in MATLAB and verified by both simulation and experiment.The results show that the influence of output load current mutation and input voltage disturbance on the converter performance can be effectively overcome by the proposed control method.

Research on the Measurement Technology of Large-scale Ship Tank Capacity based on Laser Scanning Technology

JIN Rong-pin, HU Min-jie, LI Zhi-yue, SU Xue-long

2020, 40(4):  64-68.  doi:10.12060/j.issn.1000-7202.2020.04.12

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Proposing a method of using three-dimensional laser scanning technology to collect and acquire three-dimensional point cloud data of ship tank,to register and repair the point cloud data,to complete meticulous model of internal construction of ship tank,to reconstruct three-dimensional model of large-scale ship tank quickly and accurately,to realize fast calculation of large-scale ship tank capacity.By using 3D laser scanning technology to measure the capacity of 158000 tons of large tanker cargo tanks,and compared with the traditional capacity measurement method,the disadvantages of single point data collection mode are solved,achieved the effect of rapid and accurate measurement of large-scale ship tank capacity.

Temperature Characteristic Test and Modeling of Quartz Flexible Accelerometer

LIU Chen, XU Zi-bin, LIU Yu-feng

2020, 40(4):  69-74.  doi:10.12060/j.issn.1000-7202.2020.04.13

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In order to research the characteristics and laws of the quartz flexible accelerometer under different temperature conditions,the temperature characteristic test methods of two main parameters of the accelerometer K₀ and K₁ are studied.The dynamic and static temperature curves are established relating to the temperature changing rate and holding time.Two samples are tested under different temperature conditions.The performance of accelerometer could be judged by the obtained parameters of temperature characteristic,which is modeled by the least square method.Finally,the temperature characteristic model is applied to compensate the system accuracy successfully.

Study of Measurement for Response Time of Heat Flux Sensor

2020, 40(4):  75-77.  doi:10.12060/j.issn.1000-7202.2020.04.14

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Response time of heat flux sensor is an important parameter in the fields of aviation,aerospace,energy sources and national economy.The development in response time of heat flux calibration during recent years has been reviewed.A new system of measurement for response time of heat flux sensor is described.The measurement example a of the system are given.The experimental results show that the designed measurement system can achieve the preset target,which can measure the response time of heat flux sensor.

Research on Weight Loading and Unloading Control Method of Deadweight Force Standard Machine based on Combination of Displacement and Force Value

LI Shi-xin, WANG Peng, ZHENG Hui, WEI Shu-long, LI Hai-gen, LIANG Wei

2020, 40(4):  78-82.  doi:10.12060/j.issn.1000-7202.2020.04.15

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Weight loading and unloading control method of deadweight force standard machine based on the combination of displacement and force value was introduced.By monitoring the movement of weight and the force value of the reference force sensor superposition system,the speed of the loading and unloading mechanism was adjusted in real time to realize the smooth loading and unloading of the force sensor.Through this method,the problem of large swing in the process of loading was effectively solved,which affected the accuracy of force value generated.At the same time,the phenomenon of force value overshoot was eliminated and the output deviation of force sensor caused by reverse stroke effect was avoided.

Automatic Verification System of Tention Meter based on Image Intelligent Recognition Technology

WANG Yi, XU Wei-dong

2020, 40(4):  83-87.  doi:10.12060/j.issn.1000-7202.2020.04.16

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The standard force value sensor,screw lift and pylon structure were used to replace the weight hanging method to form the tension meter automatic verification system.The stepping motor was used to drive the screw lift screw to solve the automatic force loading problem of the loading mechanism.The system automatically collected the standard sensor output force value data.The camera device was used to capture the moving position picture of the dynamometer cursor in real time and uploaded it to the computer.The digital information of the vernier displacement was obtained and converted into the dynamometer reading information by using Hopfield neural network intelligent recognition software for identification processing.The level of verification automation and work efficiency were improved by this dynamometer automatic verification system.

Analysis of Metrological Management of Special Test Equipment for Aerospace

ZHOU Ying, LV Xiao-li, GAO Ke

2020, 40(4):  88-92.  doi:10.12060/j.issn.1000-7202.2020.04.17

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Based on the characteristics and measurement management status of aerospace special test equipment, the current special test equipment measurement management mode is analyzed. Both the development of ideas and suggestions for the management of future special test equipment are provided, and reliable measurement assurance for aerospace products is provided.