Table of Content

15 August 2012, Volume 32 Issue 4

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Research on Error Measurement Method of the Replicate Light-tube

LI Yong-gang;SHANG Qiu-fang;ZHAO Gong-wei;ZHANG Zhong-wu;ZHOU Yu-tang

2012, 32(4):  1-5.  doi:10.12060/j.issn.1000-7202.2012.04.01

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The replicate light-tube is widely used in the optical angle measuring system，its manufacturing error directly influences the transfer accuracy. The expression formula between manufacturing error in different direction and the light transfer deflexion was derived, based on the theoretical analysis of optical transfer characteristic. Several measurement methods were provided for different using states.

Researches on Measurement Technology of Micro-and-deep Aperture

YUN Peng;ZHOU Cai-hong;LIANG Ya-jun;LIU Ke;WANG Xiao-ning

2012, 32(4):  6-9.  doi:10.12060/j.issn.1000-7202.2012.04.02

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The micro-and-deep aperture measurement method on length measuring machine using high accuracy inductance transducer and ruby probe is introduced. This method can measure the micro-and-deep aperture range from Φ1mm toΦ5mm and below 40mm height.When the confidence probability is 95%, the measurement uncertainty of this device is 0.6μm. The analysis result can meet these demands of measurement.

The Simulation Design of Virtual Experiment System Based on VP

WANG Dan-dan;CHEN Xiao-jun;ZHAO Wen;XU Bo

2012, 32(4):  10-13.  doi:10.12060/j.issn.1000-7202.2012.04.03

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The goal of virtual experiment system is to supply right simulation base and design gist for error analysis by virtual experiment, which reveals the process of erecting aircrafts. The model is fabricated which reveals the setting up process of aircraft launch. Based on the mathematic model, the whole erecting process was imitated by the simulation technology of three-dimensional vision technology. The development of vision system of virtual experiment is finished. The three-dimensional model which includes aircraft, camion, concourse in virtual experiment system and simulation flat are constructed.

Research and Application on PSD Used in Zero Tracking

SHANG Qiu-fang;LI Yong-gang;YANG Hui-yu; ZHANG Zhong-wu;WANG Zhen

2012, 32(4):  14-17.  doi:10.12060/j.issn.1000-7202.2012.04.04

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The working principle and characteristic of one dimension PSD are introduced, and a method that uses PSD as position sensor to achieve zero tracking is proposed. According to the method, a series of high speed, high accuracy signal processing circuit, software arithmetic and key technologies are expounded. Some difficult problems of remote vertical transfer in the azimuth angle measurement system are solved effectively, and a less than ±10″ measurement result of general angle transfer error is acquired.

The Design of Accessory Collimation Ocular and Projector

LI Pei-jian;WANG Zhen;ZHANG Zhong-wu

2012, 32(4):  18-20.  doi:10.12060/j.issn.1000-7202.2012.04.05

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One method is introduced to realize high accuracy auto collimation for mapping instruments via adding accessories without a refit. Collimating ocular is used for close quarters auto collimation, while projector is used for far-forth quarters auto collimation. Moreover, the design and analysis are referred to concretely, expanding the using range of mapping instruments in effect.

The Research on Temperature Compensation Technology of a Rubidium Atomic Clock

REN Liang;CUI Jing-zhong;LU Fang;TU Jian-hui;ZHANG Jin-hai

2012, 32(4):  21-24.  doi:10.12060/j.issn.1000-7202.2012.04.06

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A temperature compensating circuit of a rubidium atomic clock is designed based on DDS, AD9852. Temperature coefficient of the rubidium atomic clock can be improved effectively on the basis of non-deterioration of its short term stability.

The design of An Industrial Thermal Resistance Verification System

WANG Shu-jie;ZHANG Ping;JING Yun;SHEN Fei

2012, 32(4):  25-28.  doi:10.12060/j.issn.1000-7202.2012.04.07

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In order to realize automatic verification of industrial thermal resistance and improve test efficiency and accuracy of value transfer, an industrial thermal resistance automatic verification system is designed. According to the thermal resistance verification principle and idea of automatic verification, the system hardware structure and the operation steps of calibrating system are described. System uses the temperature measuring bridge and low potential scan switch, the automatic conversion of line connection method from two to three can be realized in industrial platinum resistance verification. As a development platform, VB is used to achieve automatic temperature control, data acquisition and output word statements in operating system software. The practical application shows that the system has the advantages of reasonable structure, convenient software operation, accurate and reliable value transfer.

Influence of Rotation of Steady Speed Table on Orientation Stability of Servo Table in Linear Accelerating table

GAO Yang;TANG Sheng-quan;ZHANG Xin-lei;WU Hua-yang

2012, 32(4):  29-32.  doi:10.12060/j.issn.1000-7202.2012.04.08

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The phenomenon that servo table positioning interfered by steady speed table rotating was analysis among linear accelerating table on testing accuracy of accelerometer. The weight of equipment is brought forward to be within the allowable range,  as far as possible to make the centroid of equipment close to the servo table rotary center, and use other loads to balance it if required. It has reduced disturbance torque caused by rotation of steady speed table and improved the stability of the test axis positioning, and ensured positioning accuracy to fulfil the test.

The Analysis and Design of High-accuracy Stable Platform

SU Fen-ping1；LI Dong-jie1；XIU Hong-ming1；GUO Hai-feng1

2012, 32(4):  33-37.  doi:10.12060/j.issn.1000-7202.2012.04.09

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According to the demand of high accuracy stabilized platform of shipborne, combining two-stage stabilized platform scheme was designed. Coarse stage stabilized platform is an intestinally stabilized platform including a two-degree-of-freedom gyro and two accelerometres. For the connatural precision of the gyro, a basal steady state was obtained by the coarse stage stabilized platform which ensured seeing the target. In order to reach the highaccuracy target tracking, and avoiding the shake of the sight axis, and result in the blurry image, the accurate stage stabilized platform was designed. Combing twostage stabilized platform is analyzed and designed. The structural design and ANSYS analyses were introduced and analyzed particularly.

Fast and Automatic Data Deal Technology in Space Simulation Test of Orbit/pose-control Engine

ZHANG Wei；CHEN Feng；MA Jun-qiang；LIU Shuai

2012, 32(4):  38-42.  doi:10.12060/j.issn.1000-7202.2012.04.10

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Space simulation test data of orbit/pose-control engine should be provided immediately while there were no references of related reports of fast and automatic data deal technology. Characteristics of space simulation test、principle and data file format of Pacific6000 were illustrated. On basis of analyzing current method, fast algorithm was proposed by bring in the experience of network script langue design idea, and then the automatic technology was stirred up. Related software was developed and had a fine result in real tests. This idea will have an important reference to deal with similar calculation and huge data operation.

Research on High Sound Intensity Lever Calibration Method of the Sound Intensity Probe

YANG Xiao-wei；YAN lei；ZHU Gang；LIU Xin

2012, 32(4):  43-45.  doi:10.12060/j.issn.1000-7202.2012.04.11

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Calibration methods of the sound intensity probe, their present and history are described. A focus description of the high sound intensity level calibration method and example are given, the method which makes high sound pressure source combine with phase difference control is present, it could generate up to 140dB sound intensity level.

Small Size and Low Power Dissipation Microwave Frequency Multiplier

SHI Xue-ming；GU Si-hong；CHEN Jie-hua

2012, 32(4):  46-50.  doi:10.12060/j.issn.1000-7202.2012.04.12

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In order to meet the requirement of the miniature Coherent Population Trapping (CPT) atomic frequency standard, we have studied a small-size and low power consumption microwave circuit. By means of ADS simulation, we have designed and realized small size and lower dissipation microwave circuit with a step recovery diode as the nonlinear device, and the microstrip guiding microwave. The size of the circuit is 20mm×10mm and power consumption is less than 10mW. The measured results show that when the power of input 569.5MHz signal is 6dBm, the circuit generates the wanted 3417MHz microwave signal with -9dBm output power, the output microwave satisfies the requirement of the designed CPT atomic frequency standard.

The Application of IGS Ionosphere Product in TWSTFT

WU Wen-jun；LI Zhi-gang；LI Xiao-hui；YANG Xu-hai；KONG Yao；LEI Hui

2012, 32(4):  51-54.  doi:10.12060/j.issn.1000-7202.2012.04.13

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The ionosphere errors are corrected in Two-way satellite time and frequency transfer(TWSTFT) using the ionosphere data provided by IGS. The ionosphere total electron content(TEC) is released by IGS at fixed time and geographic grid. The TEC of pierce point at requisite time is calculated by spatial four grids interpolation algorithms and temporal two linear interpolation algorithms. Then it is used to TWSTFT corrected after some processing. The results show that the ionosphere effect on C-band is about (0～0.5)ns range. It is must be considered for time comparison at sub-nanosecond level. The ionosphere product provided by IGS is suit TWSTFT ionosphere correction. It has the advantages of simple method, low cost and high accuracy.

Design of the Redundant Parallel Switching Power Supply Based on Microcontroller

LI Ran；MIN Zijian；LI Yonggang；YUAN Huimei；LI Yan-jie

2012, 32(4):  55-59.  doi:10.12060/j.issn.1000-7202.2012.04.14

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At present, The power supply with redundant parallel structure has become a effective method to increase its capacity，reliability and reduce cost. The paper discussed principles and traits of commonly-used redundancy structure and parallel current sharing, and introduced a design of redundancy parallel current sharing structure that output voltage can be adjusted based on integrated buck chip LM2576 and microcontroller MSP430.

A Novel Location Technology Based on SIFT Features Matching

CHEN Xiao-jun；WANG Dan-dan；HU Tao；ZHAO Wen

2012, 32(4):  60-64.  doi:10.12060/j.issn.1000-7202.2012.04.15

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In target positioning system, which is based on the matching of local characteristic points, the proportion of false matching points directly impacts positioning accuracy. In traditional SIFT method, in order to guarantee there are enough matching points during the matching process, usually a minor statistic field is selected. But this results in false matching because it loses relevance of surrounding fields. In order to improve the accuracy of positioning, presents an improved SIFT characteristic descriptor, which introduces PCA statistic characteristics into traditional SIFT local descriptors. In this way, a higher correct matching ratio is obtained. Traditional filtering algorithm of SIFT false matching (e.g.: NN method) loses too much correct matching while filtering out the false ones. To further reduce the false matches, proposes a second filtering which is based on the NN method, using the matching points’ coordinate information. Experiments show that this positioning method’s accuracy is better than traditional ones.

Development Trend and Status of the Servo Feedback Displacement Sensor

CUI Yu-jiang；WANG Wei；YANG Ming；GAN Lin；WANG Yan-kui

2012, 32(4):  65-68.  doi:10.12060/j.issn.1000-7202.2012.04.16

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Feedback displacement sensor is an important part of Servo system, and playing important role in aerospace products. Function principle, characteristic and application of feedback displacement sensor are introduced in present Servo system, the performance of other displacement sensor is analyzed, then the feasibility of applying in aerospace Servo system is discussed. Also,  the development trend of Servo feedback displacement sensor is prospected.

Research of ESD Shield Package Measurement

FENG Wen-wu；LIU Min；LI Shu-ming；TANG Hao-jun

2012, 32(4):  69-71.  doi:10.12060/j.issn.1000-7202.2012.04.17

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The test methods of the surface resistance  and the electrostatic inductive peak voltage of anti-electrostatic shielding bags are introduced. The characteristics of these methods are summarized. Inductive energy method from America standard is fully analysed. The advantages of anti-electrostatic shielding bag inductive energy test method are listed which using HBM model and current probe and a digital storage oscilloscope capable of a 200MHz single short bandwidth and minimum sampling rate of 500M samples per second to reduce the test errors.

The Research of Common Test System for the Aerial Target Based on Virtual Instrument

DING Li-jun；CONG Shu-quan

2012, 32(4):  72-75.  doi:10.12060/j.issn.1000-7202.2012.04.18

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To counter status quo and problems on test equipment of the aerial target, a new type of common test system of aerial target based on virtual instrument is put forward, its general construction and main functions as well as characteristics are studied, the architecture and development of the system software are discussed.

Design of the Guard Alarm Broadcasting System Based on RS-485

WANG Bing；JIN Shuo；ZHANG Peng-cheng

2012, 32(4):  76-82.  doi:10.12060/j.issn.1000-7202.2012.04.19

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The guard alarm broadcasting system is introduced. The system’s structure, principle and implementation are described. The system uses RS-485 bus technology to create a master-slave alarm broadcasting networks, four-color alarm linkage. The system has the advantages of wiring simple, strong anti-interference ability to meet the actual needs of guard duty.