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	1. Piezoelectric platform control method based on micro visual sensing
	Wang Yuliang,Cui Xiaomeng
	Electrics, Communication and Autocontrol Technology 03 March 2017
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	Abstract:In field of precise positioning of piezoelectric platform, the accuracy is affected by hysteresis and creep characteristics of piezoelectric actuators, mechanical system error and other factors. To compensate these errors, a control method based on visual sensing was proposed in this paper. Visual sensing has the advantages of high precision, non-contact and intuitive. The application of visual servo in piezoelectric control can eliminate all these error factors. Most of the existing micro displacement control systems based on visual sensing are one or two-dimensional motion control system, and have the disadvantages of slow image processing speed, low positioning accuracy and short stroke. Therefore, a measurement and motion control system based on micro visual sensing was designed by our research group for a three dimensional piezoelectric platform. A high speed camera was used to aquire the defocused image of the microspheres under the microscope at 1000 fps. The position of the platform can be obtained in real time by image processing. Transfer it to the motion control system, the output was calculated through the incremental PID algorithm. Then an accurate, fast and stable closed loop control of the piezoelectric platform was realized. The experimental results showed that the positioning accuracy reach to 15nm in the 100um stroke.
	TO cite this article:Wang Yuliang,Cui Xiaomeng. Piezoelectric platform control method based on micro visual sensing[OL].[ 3 March 2017] http://en.paper.edu.cn/en_releasepaper/content/4720571


	2. A Design and Implementation of 500GSPS Random Equivalent Sampling
	QIU Duyu,TIAN Shulin,TAN Feng,ZENG Hao,HUANG Wuhuang
	Electrics, Communication and Autocontrol Technology 23 July 2015
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	Abstract:With the increase in horizontal scanning speed, the time observing window narrows down, so the high random equivalent sampling rate is needed. There are two key points that determine equivalent sampling rate, namely real-time sampling rate of analog-digital converter and high resolution of time interval measurement. In this paper, a method of multichannel random equivalent sampling based on time-interleaved ADC structure is proposed. the crucial time-interval measurement circuit based on time to Amplitude was introduced and explored. Besides, a high-speed trigger channel is needed for high speed data acquire, the relationship of trigger signal and data synchronized clock was discussed, and the circuit of trigger channel was gave. The experimental data show that 500GSPS random equivalent sampling rate was obtain. The method given in the article can also be extended into wide ranges of high speed data acquisition system such as Time domain reflectometer, and jitter analyzer etc.
	TO cite this article:QIU Duyu,TIAN Shulin,TAN Feng, et al. A Design and Implementation of 500GSPS Random Equivalent Sampling[OL].[23 July 2015] http://en.paper.edu.cn/en_releasepaper/content/4651009


	3. Research on the Intelligent Control Algorithm of PTZ System Driven by Two-DOF Ultrasonic Motor
	Leng Xuefei,Wu Songsen,Jin Jiamei,Wang Bihui,Mao Xingyun
	Electrics, Communication and Autocontrol Technology 16 October 2014
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	Abstract:It is difficult for the traditional pan-tilt-zoom(PTZ) system driven by electromagnetic motor to meet the growing demand for video monitoring system. The key bottleneck problem is high positioning accuracy、high dynamic performance and miniaturization of PTZ system. This paper presents a PTZ system driven by new single stator two degree-of-freedom obelisk-shaped ultrasonic motor, and make research on its intelligent control algorithm. First, analysis of the structure and driving mechanism of the PTZ system mentioned above are conducted using both the method of simulation and experiment. Then this paper combines the fuzzy PID control algorithm and the variable gain cross coupling control strategy to improve the control performance. The results of simulation show that this algorithm proposed in this paper has faster response and higher precision and also has a good robustness to prevent the effect of interference.
	TO cite this article:Leng Xuefei,Wu Songsen,Jin Jiamei, et al. Research on the Intelligent Control Algorithm of PTZ System Driven by Two-DOF Ultrasonic Motor[OL].[16 October 2014] http://en.paper.edu.cn/en_releasepaper/content/4613976


	4. A Multisensor Fusion Architecture for Two Phase Flow Process Parameters Measurement
	TAN Chao,DONG Feng
	Electrics, Communication and Autocontrol Technology 12 August 2013
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	Abstract:Measuring the process parameters of two-phase flow has remained a widely discussed topic within the field of two-phase flow and measuring techniques, since to achieve this goal, a thorough understanding of flow mechanics and measuring techniques is necessary. However, the currently existing flow meters still could not meet the requirement from both the industrial and academic research, because most of the problems encountered in multiphase flow measurements arise from an increasing number of the characteristic flow parameters as compared with those in single-phase flows. This paper introduces a multi-sensor architecture of measuring process parameters of two-phase flow in a horizontal pipeline. Multi-sensor fusion techniques combine data and related information from spatially and temporally distributed sensors to achieve more complete, specific and reliable inferences than that could be achieved by using a single, independent sensor. The integration or fusion of data from each individual sensor eliminates possible redundancy and contradictions and consequently improves accuracy and reduces uncertainty of the measurement. The proposed architecture consists of a cone meter, a dual-plane Electrical Resistance Tomography (ERT) system, a set of parallel conductance ring sensors and pressure and temperature gauges. The function structure of sensor fusion is presented with data fusion algorithm. A case study on gas-water two phase flow is then presented with an improved results by using this architecture.
	TO cite this article:TAN Chao,DONG Feng. A Multisensor Fusion Architecture for Two Phase Flow Process Parameters Measurement[OL].[12 August 2013] http://en.paper.edu.cn/en_releasepaper/content/4555116


	5. EIT based on virtual instrument
	WANG Wenlong,MA Fuchang,ZHANG Jianguo,MA Jun
	Electrics, Communication and Autocontrol Technology 03 November 2011
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	Abstract:Design of a electrical impedance tomography system based on virtual instrument, the author firstly introduced the virtual instrument into the electrical impedance imaging from the perspective of hardware and software. The system use DAQ of NI to simplify the hardware structure and improve the stability. Software of system combines the advantages of LABVIEW and MATLAB, and verify some algorithms. Using NI virtual instrument, the system has strong expansion and do good basis for enhancing the performance of electrical impedance imaging system
	TO cite this article:WANG Wenlong,MA Fuchang,ZHANG Jianguo, et al. EIT based on virtual instrument[OL].[ 3 November 2011] http://en.paper.edu.cn/en_releasepaper/content/4448463


	6. Measuring Principle and Structure of New Thrust Flow Transducer
	ZHANG Xiaoyan,QIN Jianmin
	Electrics, Communication and Autocontrol Technology 12 May 2011
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	Abstract:The structure of new thrust flow transducer detecting velocity from the perspective of mechanics is proposed in this paper. Based on the above idea, the author designs the experimental device of new thrust flow transducer. In the process of detecting velocity, the traction cable's pull force which is given by the floating ball in the fluid can be measured by the experimental apparatus. Then the force situations of rigid floating ball are used to calculate fluid thrust on the floating ball. Finally, velocity can be gotten by empirical formula between fluid velocity and fluid thrust on the floating ball. Experimental device of new thrust flow transducer is simple and low cost. It can not only be used for automatic measuring in velocity of rivers in non-freezing conditions, but also be used for automatic measuring in velocity of water under ice sheet of rivers in freezing conditions.
	TO cite this article:ZHANG Xiaoyan,QIN Jianmin. Measuring Principle and Structure of New Thrust Flow Transducer[OL].[12 May 2011] http://en.paper.edu.cn/en_releasepaper/content/4424359


	7. Research on the feasibility of localizing in-vivo micro-devices with electromagnetic methods
	Guo Xudong,Yan Guozheng,Jiang Pingping
	Electrics, Communication and Autocontrol Technology 20 March 2008
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	Abstract:In order to measure the location of medical micro-devices in the gastrointestinal tract, electromagnetic methods were developed considering the magnetic permeability of human bodies. Two varieties of electromagnetic localization methods have been implemented: one used direct current to generate the electromagnetic field, and the other uses alternating current. The two varieties of the localization principle were analyzed and relevant experiments were made. The experiments show that the alternating electromagnetic method acquires higher accuracy, higher stability and wider measurement range.
	TO cite this article:Guo Xudong,Yan Guozheng,Jiang Pingping. Research on the feasibility of localizing in-vivo micro-devices with electromagnetic methods[OL].[20 March 2008] http://en.paper.edu.cn/en_releasepaper/content/19505

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