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Table of Content

    15 August 2015, Volume 35 Issue 4
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    An Automatic Control System of Fixed Multi-tooth Dividing Table Calibration Device
    SHANG Qiu-fang；LI Yong-gang；ZHOU Yu-tang；WANG Zhen
    2015, 35(4):  1-4.  doi:10.12060/j.issn.1000-7202.2015.04.01
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    An automatic control system of fixed multi-tooth dividing table calibration device was introduced. The software and hardware designing of the system is developed, the base motion as mesh-apart, rotation and mesh of multi-tooth dividing table could automatically accomplished with no person operation, and the measurement value of autocollimator could be acquired in real time, so that to make use convenient and enhanced work efficiency. In addition, the protect function against breaking tooth and high speed turning was designed in the system. The multi-tooth dividing table and autocollimator could be placed in single organic glass cover. So the effect of physical hand temperature, air temperature and airflow was decreased, and the instability of displayed value of autocollimator was reduced. The measurement repetitiveness could be enhanced by every accurate position motion of the automatic control system.
    Study for Multi-spectral Axes Parallelism Calibration of Photoelectric Tracking and Aiming System
    LIU Ya-chen；ZHANG Xin-lei；GAO Yang；LU Hai；ZHAO Jian
    2015, 35(4):  5-8.  doi:10.12060/j.issn.1000-7202.2015.04.02
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    A multi-spectral axes parallelism calibration method of photoelectric tracking and aiming system is proposed, which has combined the advantages of the large-aperture collimator and the small-aperture collimator. This method can also be adapted to the parallelism calibration of multi-spectral or different distribution spectral axes. Based on this calibration method, the multi-spectral axes parallelism calibration device is developed and tested to verify the feasibility.
    Research of Measuring Method for Missile Invaded Angle
    ZHANG Yuan；ZHANG Xiao-hui；WANG Zhi-qian；QIAO Yan-feng
    2015, 35(4):  9-13.  doi:10.12060/j.issn.1000-7202.2015.04.03
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    In order to measure invaded angle of the missile to attack the target, it is presented to use two High-speed camera, near distance gazed fixedly intersection measuring locations for characteristic points of missile middle axes, combining to plane equation is founded by precise measuring characteristic points of target attacked planes before test, invaded angle is calculated. The measuring accuracy could be acquired less than 1°in invaded angle by simulating result proving in these methods, if measure angle precision is less than 13.4″ in High-speed camera. The method is carried out easily in technique, gives a reference to measure invaded angle for missile test attacking land targets.
    Accuracy Test of Domestic Industrial Photogrammetric Camera
    XUAN Ya-bing；WANG Wei-feng；GAO Ya-wei；LV Chuan-jing
    2015, 35(4):  14-18.  doi:10.12060/j.issn.1000-7202.2015.04.04
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    Industrial camera is the basis of the industrial photogrammetry system , its imaging quality has a direct impact on measurement accuracy. At present, the domestic professional photogrammetry camera develops slowly, and its quality is uneven. So finding suitable testing method to measure and avaluate the precision of domestic professional photogrammetry camera is imperative. A case study of CIM-1camera, from the respect such as coordinates repeatability, the standard length, the precision of domestic industrial photogrammetry camera is analyzed and studied. By comparing with the current international recognition of INCA camera has carried on the contrast experiment, and analyzed the result of the experiment. Some valuable results have been found in those test. In this way, it may give some useful suggests for working out the Verification Regulation of our country in industrial photogrammetry system.
    Establishment and Realization of the Optical Coordinate Measuring Machine
    BI Chao；LV Lai-peng；FANG Jian-guo；LIU Yong；YANG Xi
    2015, 35(4):  19-23.  doi:10.12060/j.issn.1000-7202.2015.04.05
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    For the purpose of measuring middle and small workpieces with complex surfaces in a rapid, precise and efficient manner, a non-contact optical coordinate measuring machine based on the laser displacement sensor and coordinate measuring machine is established, which combines the advantages of CMM and optical sensor together to deal with the measurement of sculptured surfaces. Through calibration, the unit vector of the measuring beam of the sensor can be derived, which can be used to transform the one-dimensional length of the laser beam to the three-dimensional coordinates of the laser point on the surface. And then the coordinates of measuring points can be converted to the same coordinate system of the CMM to complete the construction of the data clouds. Finally, a metallic sphere whose diameter is 50mm is measured by the system at 10 different orientations. Through the least squares fit of the data cloud, the measuring errors are all smaller than 0.05mm, which manifests the validity of the system set up.
    Research on Anti-cheating Methods and Monitoring System of Electronic Scales
    CHI Hui
    2015, 35(4):  24-26.  doi:10.12060/j.issn.1000-7202.2015.04.06
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    At present,  there is serious cheating in China′s electronic scales,  and there exists great difficulty on supervision of electronic scales. Although many anti-cheating methods have been studied, but with little success. An overall solution of the electronic scale anti-cheating is proposed from the overall architecture to regulating process design and other aspects. Electronic scales′ life-cycle management is achieved by the method of hardware and software together.The several key issues to be resolved are advanced in order to further study for the researchers.
    Research of Silicon Piezoresistive Pressure/Differential Pressure Sensor Without Medium
    WANG Zhen；LI Wen-zhang；WANG Yan-kui；ZHU Ting-wei；LIU Shu-xuan
    2015, 35(4):  27-33.  doi:10.12060/j.issn.1000-7202.2015.04.07
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    At present, silicon piezoresistive pressure/differential pressure sensor is widely used in servo system. But because the package structure of sensor internal pressure sensitive core is thin-film isolated, the tightness of silicone oil is the weakness of servo system with sensor for long-term pressure-bearing storage. According to the requirement of the servo system of pressure/differential pressure sensor, several piezoresistive pressure/differential pressure sensors without medium are developed, interior of sensor the silicone oil medium to transfer the pressure is avoid, and the reliability of sensor is ensured. Through research of sensor structure, and its performance test and contrast, a new choose for servo system with sensor is provided.
    Application of Variable PID Law in Electric Gear Fuel Pump
    WANG Li-guo；ZHENG Tie-jun；DENG Luo-quan；LIU Zhuo-wei；CHENG Li
    2015, 35(4):  34-39.  doi:10.12060/j.issn.1000-7202.2015.04.08
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    To control the flow accurately of electric gear fuel pump,the model of flow of electric gear fuel pump is established.The digital PID law is built,and the variable PID law based on digital PID law with principle of parameters switching is built to fulfill different requirements of flow in aeroengine.The experimental results show that the accurate control of electric gear fuel is achieved by variable PID law,which means PID law can be applied to the closedloop control system of flow in electric gear fuel pump.
    Research on Wireless Sensor Network for the Launch Vehicle Measurement System
    LU Juan；WANG Ying；LIU Bing-tai；ZHANG Yuan
    2015, 35(4):  44-47.  doi:10.12060/j.issn.1000-7202.2015.04.10
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    Wireless sensor network technology is an important and prospective development direction for electronic measurement and data acquisition.  Wireless sensor network technology is briefly introduced, and then the technical difficulties are analyzed and concluded when applying this technology for launch vehicle measurement system. Two key points, environmental suitability and communication protocol, are especially and fully discussed and the corresponding theoretical models are built. This work may provide basis for constructing a reliable and efficient wireless data acquisition way in the domain of launch vehicle measurement system.
    Design for Rudder Circuit of UAV Based on the Hysteresis Motors
    CHEN Feng
    2015, 35(4):  48-53.  doi:10.12060/j.issn.1000-7202.2015.04.11
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    Rudder circuit is an important part of flight control system of UAV(unmanned aerial vehicle).Flight control system could control the angle motion of UAV via the rudder circuit,in order to achieve its stable flight.Based on a model of hysteresis motors and "Taguchi" three design methods, the effect on the rudder circuit by feedback of position and velocity is analyzed, its value range is determined, a certain type of UAV rudder circuit is designed.The test results of simulation experiment show that the design is feasible.
    Study on Test Methods of RNSS/INS Deeply Coupled Integrated High Dynamic Navigation Receiver
    WANG Tian；ZHANG Shu-feng；ZHANG Ming-zhi；PENG Ming；CHEN Qiang；ZHANG Yu
    2015, 35(4):  54-57.  doi:10.12060/j.issn.1000-7202.2015.04.12
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    The satellite navigation and inertial navigation of using deeply coupled are the world′s most advanced navigation form. With more and more wide application in defense, its performance in high dynamic state needs to be verified. There is a lack of study on test of deeply coupled receiver under high dynamic state at the moment. The composition of test systems based on satellite signal simulator and the test high dynamic authentication are described. The deeply coupled function of navigation receiver is verified through testing location velocity and tracking sensitivity under high dynamic authentication and its analyzing their messurement results, a preliminary study on the navigation receiver test methods based on satellite signal simulator is presented.
    Identification of Reliability Life Distribution with Multi-class Fuzzy Support Vector Machine
    JING Tao；CAO Ke-qiang；HU Liang-mou；GAO Bin
    2015, 35(4):  58-63.  doi:10.12060/j.issn.1000-7202.2015.04.13
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     In the field of product reliability study, identifying the reliability life distribution of a product accurately and efficiently is a key to the result of reliability modeling. The traditional Support Vector Machine (SVM) has some defects, such as unclassifiable region in multiclass classification. Aiming at those defects, a method of identifying the reliability life distribution with Multi-class Fuzzy Support Vector Machine(M-FSVM) is proposed, establishing four common models of reliability life distribution including exponential distribution, normal distribution, lognormal distribution and Weibull distribution, and is confirmed by simulation. The results show that, this method can overcome the shortcomings of traditional SVM, identify common life distribution intelligently with high recognition rate, and is convenient for the engineering application.
    Design of the Strain gage measurement instrument Automatic Calibration System
    YAN Hong-yan
    2015, 35(4):  64-68.  doi:10.12060/j.issn.1000-7202.2015.04.14
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    There are many channels and parameters in helicopter static test and fatigue test, using the traditional manual calibration creates heavy workload and low efficiency as well as overtime calibration cycle. Utilizing the communication interface of standard equipment and based on the VEE Pro software exploit platform, a platform of the automatic calibration was designed for the test load control and data acquisition system. The platform contains three main modules: Equipment Information Collection Module; Servo Control Channel Calibration Modules; Data Acquisition Channel Calibration Module and Printout Module. Practices showed that the platform is reliable, effective and accurate. The platform played an important role in all kinds of helicopter experiments, and it can be applied widely.
    A IRIG-B Time Encoding Technology Based on FPGA and Its Implementation
    LIU Hui；LUO Chang-chun；ZHONG Ming-hao
    2015, 35(4):  69-74.  doi:10.12060/j.issn.1000-7202.2015.04.15
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    In order to solve the complicated problems in circuit design of universal IRIGB time coding technology nowadays,IRIG-B time coding techniques are further researched and a new single-chip solution based on FPGA(Field Programmable Gate Array) is developed. Furthermore, coding algorithm with combination of VHDL hadware and C-language software is designed,which makes the IRIG-B time code realized and can be applied.The coding technology offers many advantages such as simple algorithm,high accuracy,good portability,which has good application prospects and better economic benefits.
    Telemetry Intermediate Device Fault Diagnosis Method for Analogue  Converter
    FENG Xin；SUN Yu-feng；QIAN Shi；KONG Yan-fang；GAO Yang
    2015, 35(4):  75-79.  doi:10.12060/j.issn.1000-7202.2015.04.16
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    The preliminary fault analysis, operation principle, removing process and common method of troubles, arised in the initial debuging stage of the analogue converter of telemetry intermediate equipment are introduced. The analogue converter can work as signal conditioning and interface when the electric parameters of tested object meet the requirement of telemetry transmission equipment by appropriate transformation and matching. It′s accuracy,reliability and safety will have a direct influence on overall performance of the system, whether it can function properly or not, will directly affect the result of test data.This study can provide reference for analogue converter debuggers and technologists.
    Quality Management and Practice of Calibration /Testing Laborary Based on Quantitative Control
    LI Yu-hua；LIANG Ya-jun；LI Ting-yuan
    2015, 35(4):  80-84.  doi:10.12060/j.issn.1000-7202.2015.04.17
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    The idea of quantitative control about the quality management is carried out in the Calibration /Testing laboratory, and the preliminary practices of the quantitative control method in key control projects are introduced. The quality work of the Calibration /Testing lab is effectively promoted by the quantitative control in areas of the quality of the measurement certification, the construction of quality system, special treatment of common problems, quality activities and the quality of training, etc.
    Investigation of the Problems in the Using of JJG52-2013
    LI Hai-ming；SHA Feng
    2015, 35(4):  85-88.  doi:10.12060/j.issn.1000-7202.2015.04.18
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    Pressure gauges are used for measuring the pressure of liquids, gases and steam, and the verification work becomes responsible because of the extensive application responsibility. With the further development of the pressure gauge verification, there exist some unreasonable places in the original verification regulation JJG49-1999, so the JJG52-1999 and the JJG573-2003 had been combined by the General Administration of Quality Supervision Inspection and Quarantine of the PRC, and the new verification regulation JJG52-2013 was promulgated in June 24 2013.It is used to guide to calibrate the elastic element type pressure gauge, pressure vacuum gauge and vacuum gauge. We contrast the old to the new verification regulation, and the problems in the using of JJG52-2013 are investigated. Some opinions and suggestions on the basis of actual application are also put forward.
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