Table of Content

15 June 2014, Volume 34 Issue 3

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Review of Carrier-based Solution Algorithms for GPS Kinetic Point Navigation

LU Chen-xi；LI Hong-yu；LI Chuang；FENG Ke-ming

2014, 34(3):  1-7.  doi:10.12060/j.issn.1000-7202.2014.03.01

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Solution algorithms for GPS kinetic point navigation with carrier phase are analyzed and compared in this paper. The fundamental formulas and observation models are introduced firstly. Then the solution algorithms are illustrated and compared in detail, divided into two parts, cycle slip correction and solution filtering. The problems to be resolved and possible researching directions are concluded finally.

Design of Carrier Tracking Loop based on Kalman Filtering

WANG Yi-ge；SUN Wu；LI Jun；ZHAO Sai-guo

2014, 34(3):  8-12.  doi:10.12060/j.issn.1000-7202.2014.03.02

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To solve the difficult of carrier tracking under the circumstances of high dynamic and weak signals, a new structure of high dynamic tracking loop is proposed based on Kalman filtering. In this paper, details of the loop are presented and the functions of all the blocks in the loop as well as parameter transmission among the blocks are discussed. Finally, compared with the FLL assisted PLL tracking loop, the simulation results indicate that the designed loop greatly improve the capability of tracking under the circumstances of high dynamic.

Research on the Time Control Method based on the Damping Coefficient Control Algorithm

ZHAO Yun；ZHOU Ming-xiang；PAN Feng；ZHAO Jing-fei；XIAO Sheng-hong

2014, 34(3):  13-17.  doi:10.12060/j.issn.1000-7202.2014.03.03

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In the process of accurate synchronizing the local time with the reference time standard, there is always a trade-off between the synchronization accuracy and the frequency stability of the steered target. A time steer method based on the damping coefficient control algorithm is presented in this paper. Firstly, the history data is fitted by using Kalman filtering algorithm and the phase difference, frequency difference, frequency drift between steered target and the reference time standard can be obtained. Then, the time steer strategy is obtained by analyzing simulation model which is built on damping coefficient control algorithm. The simulation result shows that the time steer method based on the Damping Coefficient Control Algorithm can ensure frequency stability of the steered target under certain time deviation constraint.

Thermal Design and Simulation of Assembly of Rubidium Atomic Clock for Space

LIU Zhao-hua；YANG Tong-min；ZHAI Liang；SONG Zi-jing

2014, 34(3):  18-21.  doi:10.12060/j.issn.1000-7202.2014.03.04

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To ensure the working reliability, assembly of a rubidium atomic clock for space was thermal designed and simulated, considering the support structure and distribution of high-power components Through the design and simulation, the working temperature can be kept in the requested temperature range of the high-power components，as the heat flux is avoided to increase instantaneously.Therefore the  thermal reliability of the rubidium atomic clock is ensured.

The Application Study of Differential Scanning Calorimetry Technique in Rubidium Discharge Lamp

FENG Hao；CUI Jing-zhong

2014, 34(3):  22-25.  doi:10.12060/j.issn.1000-7202.2014.03.05

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The rubidium (Rb) spectral lamp is the critical component of Rb gas cell atomic frequency standard．As a measuring tool and research method the differential scanning calorimetry technique was indispensable in the manufacture of rubidium spectral lamp. Through fitting the rubidium consumption data obtained by Long-term tracing measurement, the consumption model of a rubidium spectral lamp used currently was established. The analysis result shows that the reactive loss of Rb consume about 37.5μg metal rubidium, The speed of rubidium consumption maintain constant at 0.23 microgram per square root of hour. The predicted total rubidium consumption in the ten years lifetime is about 106μg. The measurment result of melting point and purity of rubidium in lamp show that in the first two months, the melting point and purity change sharply with close relativity. After six months aging time, the melting point and purity of rubidium reach at 39.5℃ and 99.8% from initial 36℃ and 99.5% which is fit to the trend of rubidium consumption.

Electrical Parameter Verification System of Vacuumomter based on Virtual Instrument Technology

JIA Jun-wei；ZHANG Shu-feng；WANG Huan；LI Tong；TIAN Hu-lin

2014, 34(3):  26-30.  doi:10.12060/j.issn.1000-7202.2014.03.06

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The electrical parameter verification equipment of vacuumomter and the verification method are introduced. Based on the Labview software and “Verification regulation for electric parameters of vacuumometer”, to meet the demand of ordinary type service, an electric parameters of vacuumometer verification program is developed .This software can be applied to kinds of vertification of vacuumometer, provides modular structures which may automatically deal with the date of tested machines, and the original record and certificates can go into mass production automatically.

Research on 10-fold Multiplier with Low Phase Noise

YU Meng-guo

2014, 34(3):  31-33.  doi:10.12060/j.issn.1000-7202.2014.03.07

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A 10-fold frequency multiplier with Low phase noise has been designed and manufactured．It is the 5-fold multiplieris combined with the 2-fold multiplier，the outputpower is more than 10dBm at 1GHz when the input power is about 0dBm at 100MHz, the suppression of spurs is less than -55dB. The designideas，tuningmethods and measured results of this multiplier are presented in this paper.

The Framework and Implementation of Open Multi-parameter Calibration Platform

WANG Kai-rang；WANG Yong-jie；SU Dong-lin；SHAO Hua

2014, 34(3):  34-39.  doi:10.12060/j.issn.1000-7202.2014.03.08

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The topic states the conception of synthesis calibration based on advanced test bus, using the design of modular, standard, open, systemic framework, researching the technique of portable, open multi-parameter calibration platform, supporting metrology and calibration of the field test devices greatly.

Research on Superlinearity Characteristics of the Thermoluminescence of Quartz

WAN Jun-sheng；ZHANG Ji-hong；MA Yan；ZHONG Yun-hong

2014, 34(3):  40-44.  doi:10.12060/j.issn.1000-7202.2014.03.09

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The physical model of 110℃  thermoluminescence of quartz was theoretically constructed in the present work. The superlinearity of the thermoluminescence of quartz was explored. The rsults show that the superlinearity index of quartz thermoluminescence changes with irradiation dose. The maximal superlinearity index can be larger than 4 and the minimal index can only close to zero. When the predose is very large or annealing temperature is very high, T₂traps are almost all occupied, there are no more competition traps, the superlinearity of quartz thermoluminescence disappears.

Measurement of Neutron Energy Spectra and Ambient Dose Equivalent Rates at Workplaces of a Nuclear Power Plant

CHEN Jun；LI Chun-juan；WEI Ke-xin；XU Chang-chun

2014, 34(3):  45-50.  doi:10.12060/j.issn.1000-7202.2014.03.10

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Neutron ambient dose equivalent is one of the main objects for radiation protection survey in nuclear power plant. Estimation of neutron ambient dose equivalent strongly depends on the knowledge of the neutron distribution along with their energies. The neutron spectra and ambient dose equivalent rates, at five sites inside the containment of heavy water reactor at TQNPC, had been measured using a selfmade multisphere spectrometer. The multisphere spectrometer consists of a ³He proportional counter and nine polythene spheres with different diameters from 2.5 inch to 12 inch. Response functions of the spectrometer were calculated with the MCNP code, and were calibrated and verified by a standard ²⁵²Cf neutron source. The neutron ambient dose equivalent rates and their energy distributions at the sites were also derived from the measured neutron spectra, and the results were compared with that measured by neutron ambient dose equivalent rate meter and CR-39 trace etching detectors. The measured results can provide the relevant reference data for neutron dose survey in nuclear power plant.

Development of Metalloid Impurity Elements Reference Materials in Uranium Concentrate

CAO Shu-qin；XIE Shu-jun；GONG Ming-ming；YANG li-qiong；LI Hong

2014, 34(3):  51-53.  doi:10.12060/j.issn.1000-7202.2014.03.11

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Two levels metalloid impurity elements reference material in uranium concentrate were developed. The reference materials can be used for the trace measuring value and its transfer of metalloid impurity elements，manufacturing environment of reference materials was in accordance with the technical specification of national class A standard substance.

Research on Scattering Effects of High γ-ray Reference Radiation Field

MIAO Liang-liang；YU Xiao-ren；SONG Xiao-jing；MA Yan

2014, 34(3):  54-59.  doi:10.12060/j.issn.1000-7202.2014.03.12

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The scattering characteristics of high γ-ray reference radiation field is stimulated by the Monte Carlo code MCNP to confirm the dose rate and the energy spectrum distribution of the experimental space. Careful analysis of the scattering of shielding wall and in-beam scatterer from multiple perspectives provides reference for the experimental application and shield design of Co-60 radiation field of  Calibration laboratory.

Image based Technology on Automatic Targets Directing by Theodolite

ZHAO Wei-lin；CHEN Ji-hua；LI Yong

2014, 34(3):  60-64.  doi:10.12060/j.issn.1000-7202.2014.03.13

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Due to high accuracy of electronic theodolite, multi-theodolites based industrial measurement systems are widely used for geometric detection of large-scale industrial products. However, theodolites can’t direct and recognize targets automatically, it exists the defects of inefficiency, Low accuracy etc. Automatic targets directing and recognizing(ATD&R) will be a new direction for the next generation theodolites. A novel technology is presented here to settle for targets approximate positioning. A camera is mounted on the theodolite, then they are calibrated for the mutual coordinate systems parameter, before measurement, targets image captured, when the image coordinates of the targets are known by image characteristic recognizing technology, direction data of all the targets can be calculated. Theoretical derivation and experiments show that the presented method is effective to get the targets’ approximate position.

Research on Automatic Detection Equipment Design Method of Weapon Equipment based on Computer control

CONG Shu-quan；JIANG Zhi-hua；CHEN Jian-tao

2014, 34(3):  65-68.  doi:10.12060/j.issn.1000-7202.2014.03.14

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Detection technology is the basic of weapon equipment design,research,use and protection. This article analyses the structure,composition and function of automatic detection equipment of weapon equipment,and takes the UAV equipment automatic detection for example,discuss the design method and measure of  the UAV automatic detection equipment based on computer control and PXI bus.

Metrology and Measurement for Military and Marketing

ZHANG Xiao-lei

2014, 34(3):  69-72.  doi:10.12060/j.issn.1000-7202.2014.03.15

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With the rapid development of metrology and measurement for military, measurement is not only national statutory, but also with social competition in the market. Therefore, marketing has been one of the most important subjects that can raise a corporation of metrology and measurement for military to a more important rank. It is an important issue that how to make a strategic planning with a feature of metrology and measurement for military combined with such an actual condition nowadays. This text analyzes the environment of the corporation of metrology and measurement for military and makes the relevant strategic planning of marketing according to the environment nowadays.

Study on the Enhancement of Metrological Guarantee for Weapon Research and Production

HUANG Jin；WANG De-bing

2014, 34(3):  73-78.  doi:10.12060/j.issn.1000-7202.2014.03.16

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The paper briefly introduces the new trends of correlated armament development, and analyzes the gap between status quo of metrological guarantee work of correlated civilian enterprises and metrological guarantee requirements of armament development. It proposes a model of cooperation among specialized management department in charge of defense metrology, metrology engineer system of new armament development and correlated civilian enterprises. Detailed suggestions are provided to enhance the metrological guarantee work level of correlated civilian enterprises and to overcome the weakness of metrological guarantee work in armament development.