Table of Content

15 October 2015, Volume 35 Issue 5

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Application of Relative Measurement Uncertainty in Microwave Power Measurement

ZHANG Wei-wei；YANG Xu-jun；CHEN Yun-mei

2015, 35(5):  1-5.  doi:10.12060/j.issn.1000-7202.2015.05.01

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The relative measurement uncertainty in microwave power measurement is discussed in this paper. The mathematics model and step on the uncertainty analysis and evaluation are described based on two examples of microwave power measurement. The expression regulation and application of relative measurement uncertainty are recommended.

Research on Automatic Metrology System for Microwave Landing System Simulator of Aircraft

LEE Qiong-wei；LI Xiao-hui；AN Shao-long；DONG Zhi-ming；WANG Yue-chao

2015, 35(5):  6-10.  doi:10.12060/j.issn.1000-7202.2015.05.02

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The authors start with the brief demonstration of MLS stimulator and its metrology specifications. Then, they present the research achievements on automatic metrology system for MLS simulator, including the construction and key technology of the hardware subsystem, the core process and architecture of the software subsystem. They lastly use the automatic metrology system for some MLS simulators verification/calibration. The application shows that the findings have surmounted technical difficulties of MLS simulator metrology support and ensured the parameters accuracy and consistency of MLS  airborne equipment, which make sense for improving flight safety.

Study on the Calibration Technology of On-wafer S-parameter Measurement System

WU Ai-hua；SUN Jing；LIU Chen；LIANG Fa-guo；ZHENG Yan-qiu

2015, 35(5):  11-16.  doi:10.12060/j.issn.1000-7202.2015.05.03

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On-wafer S-parameter measurement system has been widely applied in bare chip measurement in the semiconductor industry, but the current situation of the ineffective traceability of domestic on-wafer S-parameter measurement system has influenced the R&D process of high-end bare chip products. To develop the calibration capacity of this measurement, this paper developed strip on-wafer calibration standard, on-wafer transmit calibration standard and on-wafer verification standard, built high accuracy on-wafer S-parameter transmit standard calibration system, traced on-wafer S-parameter to  geometric basis through HFSS simulation method, and then finally built the calibration capacity with on-wafer S-parameter transmit parameter , laid the technical foundation for completing the on-wafer S-parameter measurement system finally.|

A Method of Noise FM Jamming based on DDS

QUAN Lian-ji；GAO Xi-quan

2015, 35(5):  17-20.  doi:10.12060/j.issn.1000-7202.2015.05.04

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Noise FM jamming which has wide jamming band and large noise power is widely used in processing backup jamming to radar, fuze and communication. The paper adopt DDS combines with characteristic of FPGA chip to generate noise FM jamming. The method has large improvement in precision, structure and speed, and has broad application and prospect.

Application of Wireless Receiver′s EMC Fast Testing Technique in Complicated Electromagnetic Environment

XING Kui；XUE Meng-lin；WANG Ya-wei

2015, 35(5):  21-26.  doi:10.12060/j.issn.1000-7202.2015.05.05

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icated RF electromagnetic environment (EME). In consideration of the limits of the testing methods for receiver′s nonlinear characteristic given by GJB 151B, this paper presents a fast interference response testing technique based on the automated double frequency system. Experimental testing and analysis of receiver is performed here as an application example, which includes the detection and recognition of all the nonlinear interference response under scanning frequency （4~6）GHz. Testing results are pretty valuable for the estimation of the actual environment adaptation of the receiver and system in severe EME.

Design of IF Receiver in Noise Standard

TAN Fan；CHEN Jin-long

2015, 35(5):  27-31.  doi:10.12060/j.issn.1000-7202.2015.05.06

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A design of high sensitive IF receiver in the noise standard is introduced. The receiver is an alternative of Agilent 8970 on noise power measurement. As well as the theory of IF receiver, the experiment results were proposed in this article.

Measurement Method of Multi-channel Phase Consistency based on Carrier Phase

YUAN Guo-jing；SHAO Jun；ZHAO Wen-wen

2015, 35(5):  32-35.  doi:10.12060/j.issn.1000-7202.2015.05.07

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For satellite navigation systems，the multi-channel parallel navigation signals will be synthesized by the navigation antenna beam forming system needs to have strict phase consistency. This paper presents a multi-channel pseudo range measurement method to measure the relative delay of multi-channel navigation signals based on carrier phase. By the joint calculation method of carrier phase and pseudo code phase, the extremely distance accuracy of 1ps is achieved. And then, the strict phase consistency without difference of the carrier cycles is realized.

Research on the Simulation Model to Analysis and Experimental of the Hydrogen Maser Frequency Standard based on Matlab

ZHENG He-fei；FENG Ke-ming；LI Jing

2015, 35(5):  36-40.  doi:10.12060/j.issn.1000-7202.2015.05.08

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Considering the features of Hydrogen maser Frequency Standard (HFS), simulation models was built up, including the hydrogen physics package and servo loop. Then those models were linked from beginning to end and the whole closed. The loop simulation model of HFS was gotten. The HFS system output response was analyzed and validated under the condition of open loop and closed loop.

De-noising Method for PPP Time Comparison Data based on EMD

LEI Yu； ZHAO Dan-ning

2015, 35(5):  41-44.  doi:10.12060/j.issn.1000-7202.2015.05.09

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Time comparison realized by precise point positioning (PPP) can be easily influenced by random noise. Therefore, it is essential to separate noise from signals in time series. In this paper, an empirical mode decomposition (EMD) based de-nosing method for time comparison data firstly is presented. Furthermore, the proposed method is compared with the Vondrak filter. It is shown that the developed method is comparable with the Vondrak filter, and can improve the stability of time transfer noticeably.

A New Method of Amplitude Measurement of High Frequency Sinusoidal Signal based on Time Comb Technology

ZHENG Sheng-feng；CHEN Xue-lei；WANG Ben-yi

2015, 35(5):  45-49.  doi:10.12060/j.issn.1000-7202.2015.05.10

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A new method for amplitude measurement based on time comb technology is introduced in this paper. The principle of time comb is given, and its characteristic is analyzed .The principle is used in data acquisition of high frequency. Equivalent sampling technology is abstained，avoiding high sampling frequency and combined with autocorrelation and multilayer autocorrelation technology，Then amplitude is detected when the Nyquist sampling theorem is not satisfied. Simulation results shows that the high resolution for high frequency signals especially in low signalnoise ratio condition.

A Fast Adaptive Control Method for Air Enclosure

SONG Jia-yun；PAN Pan；LI Bin；WANG Shu-qiang；LIU Bi-ye

2015, 35(5):  50-53.  doi:10.12060/j.issn.1000-7202.2015.05.11

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An improved adaptive method was introduced in this paper. With this method, a novel portable precision air enclosure which was able to choose different control strategies according to the temperature difference between inside and outside the enclosure could be designed. In this system, the higher application requirements that the temperature inside the portable air enclosure is more precise accurate to 20mK can be made with the use of dualmode operating.

A High Accurate Calibration Method for High Value DC Resistor 1MΩ~100GΩ

WANG Yi-bang；ZHENG Shi-qi；LIANG Fa-guo；QIAO Yu-e；LIU Xia-mei

2015, 35(5):  54-56.  doi:10.12060/j.issn.1000-7202.2015.05.12

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High resistance meter and digital source-meter have a wide application in semiconductor industry. But commercial high value resistance whose accuracy is (±1.0×10^-3~±1.0×10^-2) cannot meet the need of traceability of resistance parameter for high resistance meter and digital source-meter. The paper demonstrates a high accurate calibration method for commercial high value dc resistor, realized by a comparator bridge composed of two multifunctional calibrated voltage source and a zero-current-meter. A calibrated system is set based on the method, and the measurement uncertainty is 3.0×10^-5~8.0×10^-4, whose accuracy can meet the calibration need of most of high resistance measurement instrument.

Design of Digitial Inductive Sensor based on ARM

HUANG Jian

2015, 35(5):  57-60.  doi:10.12060/j.issn.1000-7202.2015.05.13

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In order to overcome the shortcomings of the traditional inductor detection methods, a new digital inductor detection method proposed, based on the principle of eddy current using advanced digital inductive transformer as sensor,through Printed Circuit Board(PCB) inductor to detect metal is detected.Transfered the detection results data to digital, used an Serial Peripheral Interface (SPI) connecting to an Advanced RISC Machines ortex-M4 in order to implement high-speed,high-sensitivity metal detection.The test results show that the device overcame the shortcomings of the traditional inductor detection which had poor performances of anti-interference, analogy interface,less accurate etc. It fulfilled high-speed, high reliable data transmission, at the same time it made measurement accuracy up to sub-micron precision. Inductive sensing equipment had many applications such as precise measurement of distance,angle,motion displacement and compression.

Research on the Calibration Method of the Three Phase Power Meter of the Transformer

XUE Yan；LIU Yu-bo

2015, 35(5):  61-63.  doi:10.12060/j.issn.1000-7202.2015.05.14

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As the pointer type three-phase power meter with one side and two side ratio, the nominal of three phase power is usually obtained by calculation. Aging voltage and aging current. In the simple case, the power value is the product of voltage and current in a specific power factor, which may lead to a large error. And even a false judgement of the calibration results. In this paper, we will give a description of the calibration method of the three phase power meter which is connected to the transformer, and theoretical analysis.

A Data Transmission and Management Scheme of Inter-Satellite Network on 1553B Bus

LIU Qi-ming；FENG Xu-zhe

2015, 35(5):  64-69.  doi:10.12060/j.issn.1000-7202.2015.05.15

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The normal operation of the satellite requires the data transmission and management of inter-satellite network with reliability, timeliness, security, therefore transport tasks can be completed within the time prescribed. Hence an appropriate data transmission and management scheme should be designed to meet those requirements.1553B busbased data transmission has many advantages such as high transmission speed, good reliability and strong timeliness, thus 1553B bus is chosen as the data bus of the inter-satellite network. What’s more, a suitable data transmission and management scheme is proposed. This scheme reasonably designs the data structures, data types, network type, data transmission mechanism, data transmission process and data transmission time sequence. Finally, the data transmission and management scheme is tested on testing platform, test result shows that this scheme has high transmission speed, low error rate, good real-time performance and it meets the requirements.

Research on Comprehensive Geometry Parameters Calibration for RCS Measurement System

XU Yong；SUN An-bin；CAO Tie-ze；HE Xiao-mei；LI Zhi-ping

2015, 35(5):  70-74.  doi:10.12060/j.issn.1000-7202.2015.05.16

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In this paper, it is described the research work of the geometric parameters calibration technology for RCS test system, including form parameters of radar reflector, the spatial position of equipments, the geometric parameters of scale object, and so on. A comprehensive calibration device for parameters of RCS test system is developed and applied. The value traceability system of the geometric parameters in RCS test system is initially established. It is laid a solid technical foundation for calibration of domestic RCS test system.

Research on the Measurement and Security Mode of Special Equipment

DU Fu-peng；SHI Yong-bin

2015, 35(5):  75-78.  doi:10.12060/j.issn.1000-7202.2015.05.17

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Combined with the current equipment measurement support status, the research on equipment metrology support mode and the equipment of metrology support is necessary. It is important to grasp the credibility of the equipment measurement data accuracy and technical indicators of working conditions. From the equipment development, production, use and maintenance, it elucidates the necessary of the measurement. Starting from the timeliness, it puts forward the combination of compulsory verification and metrology of testing system. From the point of view of the reliability, the laboratory metrological verification and onsite metrological verification are combined to metrology scheme. It is researched on metrological verification data and system test data sharing data aspect. The study is important of the accumulation and analysis on data.