To eliminate the temperature effect of Fiber Bragg Gratings(FBGs),a new thermal stress compensation mechanism and an online-forming technology are presented to design and manufacture a novel FBG strain sensor. The sensor can not o

An active optical experiment was carried out by a mirror with a diameter of 400 mm and a thickness of 12 mm. The support construction of the mirror included 12 active supports and 3 fixed supports,in which the active support was i

A kind of automatic and adjustable illumination system was designed to improve the poor precision in the measurement of strong ocular aberration of human by a narrow parallel beam illumination.By adding a position adjustable colli

The optical telescope of satellite optical communication terminal is composed of an objective and an eyepiece,and the axial center distance of the two lenses has an important influence on emitting and receiving performance of the

To determine the relationship between the size parameters and the exposure accuracy of a curtain-type shutter,the expression of exposure time is calculated,and the mathematical model of exposure accuracy is established according t

In order to enhance the UV-response of CCD & CMOS detectors, Zn2SiO4:Mn phosphor with the properties of small particle sizes,well-stabilizing and high-luminescence quantum efficiencies was chosen as a film material to be coated on

In order to improve the neutron chopper design,the structural models of a single-chop-disk and an opposite rotate double-chop-disk were established. According to corresponding physical parameters, the neutron pulses formed by the

A hybrid algorithm combining the characteristics of a conjugate gradient iteration method,a regularization equation and a Successive Over Relaxation (SOR) technique,namely,two-segment iterative method,is proposed to reverse effici

The light emitting and light receiving devices in laser range finders are low-power components characterized by temperature sensitivity. When a Pt resistance is set in a circuit for temperature measurements,the self-heating effect

The detecting image simulation for an orbiting camera has played an important role in the feasibility argumentation,the research of information processing method and the test of orbiting optical camera on the ground. In this paper

The thermal control system of electronic equipment of a space camera was designed and simulated for resolving the problem of its heat dissipation. The thermal design of electronic components,Printed Circuit Boards (PCBs) and their

In order to decrease the fuel consumption under a finite thrust,a method applying nonlinear programming is presented to solve the optimal control problem on the soft landing of a lunar probe. Based on Pontryagin maximum principle,

To obtain a higher resolution and a widen dynamic range,the relationship between the system resolution and its noise of a spectroscopic Surface Plasmon Resonance(SPR) analyzer was analyzed. For the purpose of improving the Signal

The important role of tail fin of a fish in swimming is to produce a thrust. In this paper,a three-dimensional test and analysis method for instantaneous 3D tail fin profile measurements based on the Fourier transform profilometry

To improve the heat dissipation efficiency and to enhance the lifetime and wavelength stability for diode lasers, a roof-like silicon microchannel heat sink characterized by a high integration level is developed. Taguchi robust de

The cathode current density and the fluid field relevant to the growth of electroforming layer is studied with numerical analysis to explore the inherent laws of micro-electroforming that is a key technology of UV-LIGA. By taking

A new control method of disturbance compensation based on acceleration signals is proposed to enhance the servo function of speed control system of a DC torque motor in a precise photoelectric stabilized-platform and to make the s

A new low-cost precise displacement platform without a guiding apparatus was developed to perfect its working performance and to improve the displacement straightness and position accuracy of the system. Based on the theories of p

For improving the dynamic roundness of the sphere hollow rotor in an electrostatic gyro,a rotor was designed to be a long sphere with long-polarized and short-equatorial diameters in a static state to compensate the roundness erro

A simple way to measure and correct the micro-displacement of a piezoceramic tube used in an Atom Force Microscope(AFM) is proposed. The X/Y micro-displacement is detected by an eddy current meter and it is amplified by 100 times

A novel biochemcal sensor based on a high-Field Asymmetric Ion Mobility Spectrometry(FAIMS) theory is fabricated and characterized,which is mainly composed of an ionization source,a drift tube and a detector. By taking a VUV lamp

In order to reduce the influence of scroll and pitch movements on the image quality of a TDICCD space camera,the requirements for the scopes of scroll angle and pitch angle and their control errors are put forward to obtain an ima

The update rate is a key characteristic of star sensors,and it has been considered as an important research direction in future.In this paper,a method for increasing the update rate of a star sensor is presented and the compositio

For the problem of a large amount and slow speed in the serial Particle Swarm Optimization(PSO) algorithm,a parallel PSO tracking algorithm based on Digital Signal Processing(DSP) parallel system is proposed. In the development of

Design of a high-speed Fast Fourier Transform(FFT) processor is one of key points in a real time signal processing system.In this paper,a high speed and a hybrid architecture FFT processor combining a parallel processing with a Si

In consideration of the measurement time-delay and plant model uncertainty from signal processing and transmissiances in an imaging tracker,a robust Internal Model Control (IMC) strategy is designed for the opto-electronic trackin

In order to locate and exclude the singularity induced by vibration and to evaluate the surface texture exactly,a wavelet singularity detection and filtering method is presented. Firstly,the wavelet singularity analysis is used to

Because ordinary image compression algorithms and other compression methods based on Digital Signal Processors(DSPs) or PC machines can not satisfy the demands of high speed and small volume image compression applications,a low co

In consideration of the requirements of quality inspection and reverse design for Computed Tomography(CT) products,a CT image edge degradation model was established and used in the image size measurement to improve the measurement

With the aim to improve the stability and reliability of image matching,the Scale Invariant Feature Transform algorithm(SIFT) is applied to image feature extraction and image matching. The SIFT can find out those feature vectors i

In order to satisfy the on-line inspection requirements of the surface mounted Integrated Circuit(IC) devices on Printed Circuit Boards (PCB),an inspection algorithm based on the edge integral projection and color statistical feat

The traditional histogram equalization is unable to preserve the input image brightness,when the contrast of an image is enhanced. Based on a Partially Overlapped Sub-block Histogram Equalization algorithm (POSHE),the recursive se

With linear YCBCR space and Reinhard’s statistical color transfer strategy,a color transfer method for image fusion,named YCBCR color transfer method,is proposed to produce a fused image with a natural daytime color appearance. Th

In order to achieve robust dim and small target detection in a infrared cloud clutter,a new approach based on fuzzy classification is proposed. Different kinds of class regions are extracted from the query image to get several cla

Aiming at the problem of real time and reliability of visual object tracking in a clutter background,an adaptive tracking algorithm by fusion of the color rectangle feature with the Edge Orientation Histogram is presented based on

For solving the mismatching problem in computer vision,a discontinuity preserving stereo matching algorithm using variable windows in an energy minimization framework was proposed. Firstly,a dissimilarity combing intensity and gra

A novel method combing an Improved Chain Code Based Edge Tracking (ICCBET) with Pyramid Hough Transform (PHT) is proposed to detect the airport runway in real time successfully ,for the traditional line detection method by using c

The track-before-detection (TBD) based on a Rao-Blackwellized Particle Filter(RBPF) is proposed for detecting and tracking a number of weak targets in an infrared image with low Signal to Noise Ratio (SNR). A system dynamic model