State Key Laboratory of Precision Measuring Technology and Instruments

Tianjin, China

State Key Laboratory of Precision Measuring Technology and Instruments

Tianjin, China

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Bian Y.,Tianjin Information Sensing and Intelligent Control Key Laboratory | Bian Y.,State Key Laboratory of Precision Measuring Technology and Instruments | Wang X.,Tianjin Information Sensing and Intelligent Control Key Laboratory | Zhao L.,Tianjin Information Sensing and Intelligent Control Key Laboratory | Cui S.,Tianjin Information Sensing and Intelligent Control Key Laboratory
Proceedings of 2016 IEEE Advanced Information Management, Communicates, Electronic and Automation Control Conference, IMCEC 2016 | Year: 2016

Brain-Computer Interfaces (BCIs) are a new way that can enable information exchange without any movement but just through the mind. This technology improves the communication and control capabilities of human beings with the outside world, which often uses to help disabled people. In recent years, BCIs begin to be explored to assist people in some extreme conditions such as in space to control space robot. However, it is still not very clear that how to operate space robots robustly and flexibly in complex conditions. Furthermore, in order to control space robots more effectively, the combination of multi bio-signals has been rarely reported up to now. This paper introduced a new biological sensing system of space robot based on brain-computer interactive control. We combined multi bio-signals which were electroencephalogram (EEG), electromyography (EMG) and voice to send the mission control command for the space robot. In the system, biological dry electrode sensors and a microprocessor module were utilized to collect or analyze these bio-signals. The simulating space experiments indicated the reliability, safety and low-power consumption of the space robot control system. Undoubtedly, to the aim of space robot controlling, this study explores a novel way for astronauts getting along with space robots in the outer space. © 2016 IEEE.


Pei B.,State Key Laboratory of Precision Measuring Technology and Instruments | Zhang F.,State Key Laboratory of Precision Measuring Technology and Instruments | Qu X.,State Key Laboratory of Precision Measuring Technology and Instruments | Zhang T.,State Key Laboratory of Precision Measuring Technology and Instruments | Wang J.,State Grid Corporation of China
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | Year: 2017

Echo receiving system is an important part in the optical system of frequency modulated continuous wave non-cooperative target ranging; and its receiving characteristics have certain influence on the ranging precision of the system. In order to conduct the design and analysis of the system, optical design software was used to conduct the modeling of the receiving system with Cassegrain telescope and multimode fiber as the main body, and the parameters of the Cassegrain telescope were determined through analyzing and optimizing the aberration and optical receiving efficiency. The Gaussian scattering model for the backscattering of the target was established; a complete receiving optical path was built to conduct the experiment; the received power of the system was analyzed quantitatively under different conditions, and the rules between receiving efficiency, focusing position and target distance, surface scattering were investigated. The research results show that for the sample blocks processed with the same method, the system receiving power is negatively correlated with the roughness and target distance, while the system focusing distance is positively correlated with the roughness and target distance. © 2017, Science Press. All right reserved.


Li D.,State Key Laboratory of Precision Measuring Technology and Instruments | Sun C.,Tianjin Key Laboratory of Biomedical Detecting Techniques and Instruments | Yu S.,State Key Laboratory of Precision Measuring Technology and Instruments | Yu H.,Tianjin Key Laboratory of Biomedical Detecting Techniques and Instruments | Xu K.,State Key Laboratory of Precision Measuring Technology and Instruments
Proceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS) | Year: 2015

An implantable U-shaped fiber ATR (attenuated total reflection) sensor enhanced by silver nanoparticles (AgNPs) on cylindrical surface was presented for continuous glucose monitoring. U-shaped structure was addressed to increase effective optical length at limited implantable space to enhance the sensitivity of fiber ATR sensor. A novel method to fabricate silver nanoparticles on cylindrical surface of U-shaped fiber ATR sensor based on chemical reduction of its silver halide material directly without any preliminary nanoparticles synthesis and the following covalent bond or self-assembly was proposed. The silver nanoparticles will further enhance infrared absorption signal of fiber ATR sensor. The experiment result shows that the sensitivity of enhanced fiber ATR sensor enhanced by the silver nanoparticles is about three times than the normal one. © 2015 IEEE.


Zhou Y.,State Key Laboratory of Precision Measuring Technology and Instruments | Wang X.,Tsinghua University
Gaojishu Tongxin/Chinese High Technology Letters | Year: 2012

A RuO 2 micro-supercapacitor with a side-by-side electrode configuration structure was designed and fabricated. It was composed of the micro-structure, the micro-electrode, and the functional RuO 2 film on the electrode. The micro-structure was made by the MEMS technology, while the micro-electrode was made by electroplating the functional RuO 2 film on the surface of the current collector. The electrochemical test results showed that the micro-supercapacitor had the specific capacity of 0.012F·cm -2 and the energy density of 0.006J·cm -2. The performance of the RuO 2-CNT (carbon nanotube) composite functional film was studied. The cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) curves showed that compared with the RuO 2 film, the RuO 2-CNT composite film greatly decreased the internal resistance, and improved the energy-storage density and the charge-CNT discharge quality of the micro-capacitor. Anyway, the micro-capacitor can satisfy the energy requirements of a lot of microsystems for its great stability and discharge power.


Li L.,Xi'an Jiaotong University | Yang S.,Xi'an Jiaotong University | Yang S.,Huazhong University of Science and Technology | Zhang X.,Xi'an Jiaotong University | And 7 more authors.
Microelectronic Engineering | Year: 2014

In this paper, a photodetector based on single cadmium sulfide (CdS) nanowire was fabricated using focused ion beam (FIB) technique. The nanowire manipulation, transferring and electrode fabrication process by the FIB and its influence on the photodetector performance were studied. CdS nanowire was synthesized by Vapor-Phase-Transport (VPT) method. CdS powder was thermally evaporated at 950 °C in the Argon (Ar) gas as the source material. High Resolution Transmission Electron Microscope (HRTEM) and X-ray Diffraction (XRD) experiment results showed that the nanowire presented wurtzite CdS structure and good crystal quality. The photoresponse time and recovery time of the photodetector were 150 ms and 53 ms, respectively. The photosensitivity was 2.83, and the low sensitivity was caused by the deposition of Ga on the surface of the nanowire and electrode gap during the FIB fabricating process. © 2014 Elsevier B.V. All rights reserved.


Zhao Q.,State Key Laboratory of Precision Measuring Technology and Instruments | Qiu Z.,Tianjin University | Fang F.,State Key Laboratory of Precision Measuring Technology and Instruments
Jingangshi yu Moliao Moju Gongcheng/Diamond and Abrasives Engineering | Year: 2010

An image processing system for the automatic lapping of diamond turning tools was researched. Diamond turning tools were installed initially using shape-based template matching method, and then the profile and position information of tools were measured online at sub-micro precision. The results shown that the developed image processing system can be successfully employed for the measurement of diamond tools with radius I mm, 0.5 mm and 0.2 mm, respectively. It can obtain the profile and position informations needed by automatic lapping online, and provide a guarantee for development of automatic grinding system in respects of accuracy and efficiency.


Zhang Y.,CAS Institute of Mechanics | Duan F.,State Key Laboratory of Precision Measuring Technology and Instruments | Li T.,CAS Institute of Mechanics | Li M.,State Key Laboratory of Precision Measuring Technology and Instruments | Ouyang T.,State Key Laboratory of Precision Measuring Technology and Instruments
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2010

Based on vibration measuring principle of blade tip-timing, fiber bundle sensor used as blade tip-timing is designed. "5+2" scheme of double-rate sampling is adopt to solve the under-sampled problem of asynchronous blade vibration. By using frequency identification, blade's real vibration information can be obtained. The method is applied on a model of aerial equipment to do simulation experiment whose result is similar to theoretical model, and the frequency measured is in accord with the result of strain gauge in general. Validity of measuring scheme is verified through the contrast result which also declares high practicable value of this identifying technique. © 2010 Copyright SPIE - The International Society for Optical Engineering.


Lin J.,State Key Laboratory of Precision Measuring Technology and Instruments | Zhu J.,State Key Laboratory of Precision Measuring Technology and Instruments | Guo Y.,State Key Laboratory of Precision Measuring Technology and Instruments | Guo T.,State Key Laboratory of Precision Measuring Technology and Instruments | Ye S.,State Key Laboratory of Precision Measuring Technology and Instruments
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | Year: 2012

Global measurement and precision control are the basis of precision measurement in large space, determine the applicability and performance of overall measurement. In order to improve overall spatial measurement accuracy, while solving the problem of orientation and scale, high-precision measuring control network must be laid in the global space. As an important representative of geometric measurement, three-dimensional coordinate is the most direct way and the strongest constraint in establishment of the measurement control network. In order to establish precise coordinate control network, laser tracker is used to measure three-dimensional coordinate of global points by multi-station, then orientations of all stations are figured out by singular value decomposition algorithm, and tracker angle measurement error is optimized by making the high-precision length measurement as a constraint to improve accuracy of the coordinate control network. This method is applied to shape measurement of aircraft wing surface, it can realize the combination of tracker global control and terminal photogrammetry, the result of comparing with distances between global control points in several stations is demonstrated that the control network can improve the field measuring accuracy and reliability. © 2012 Journal of Mechanical Engineering.


Li M.-L.,State Key Laboratory of Precision Measuring Technology and Instruments | Duan F.-J.,State Key Laboratory of Precision Measuring Technology and Instruments | Ouyang T.,State Key Laboratory of Precision Measuring Technology and Instruments | Kong X.-H.,State Key Laboratory of Precision Measuring Technology and Instruments | Ji M.-L.,State Key Laboratory of Precision Measuring Technology and Instruments
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2010

A new method for the frequency identification of rotating machinery blade vibration at even speed was presented. The vibration signal was obtained by the method of blade tip-timing, which is the sub- Nyquist sampling data with multiple harmonics. With the analysis of signal's mathematical model, the frequencies were identified based on ESPRIT through two blade tip-timing sensors which work as delay and non-delay signal channels. The theoretic foundation of ESPRIT and the process of frequencies estimation were introduced combining with computer simulations and practical experiments, which are used for testing and verifying the performance of the new method.


Li X.,State Key Laboratory of Precision Measuring Technology and Instruments | Chen H.,State Key Laboratory of Precision Measuring Technology and Instruments | Chen Q.,State Key Laboratory of Precision Measuring Technology and Instruments
2012 IEEE 5th International Conference on Advanced Computational Intelligence, ICACI 2012 | Year: 2012

Visual analysis of human movement is a hot topic in the field of computer vision. A novel algorithm- column integral, speed up the head location, and has the more precision than previous algorithm. A head turning detection algorithm has been presented, which based on the color information of each space branch area and template match, and it is simple and effective. The experiment result indicate that the proposed algorithm has a good real-time performance, the improved head positioning algorithm can reduce by 1.24 ms than the similar algorithm in once position, and accuracy of the head turning detection algorithm can reach 92%. © 2012 IEEE.

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