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Issue 11 ， 2018
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Minimally invasive continuous blood glucose monitor based on microfluidic and enzyme colorimetric technologies
Abstract：Continuous blood glucose detection is of great significance in the diagnosis and treatment of diabetes. In this study, an integrated, automated minimally invasive blood glucose continuous detection instrument was designed. Interstitial fluid (ISF) was transdermally extracted by a microfluidic chip, and the volume of the ISF was accurately measured by the single-chip computer. The glucose contained in the fluid was detected by enzyme colorimetry. Then, continuous blood glucose detection was achieved using th Keywords：continuous blood glucose monitoring;interstitial fluid;enzyme colorimetry;minimally invasive- 81
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Published：2020-07-05 -
Improved algorithm for interferometric measurement of low-frequency underwater acoustics
Abstract：A laser interferometry system was built to accurately realize the frequency identification of low-frequency underwater targets. An improved algorithm was proposed based on the Phase-Generated Carrier (PGC) demodulation technology using the arctangent demodulation algorithm. First, a set of interference experiment systems was built using discrete optical elements under an optical darkroom. Water surface waves were introduced into the reference optical path as a high-frequency carrier, and the interference si Keywords：laser interference;underwater acoustic source;frequency detection;phase-generated carrier- 62
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Published：2020-07-05 -
Measurement of velocity field distribution of complex particle flow by spatial filter
Abstract：The spatial-filtering velocimetry method has the advantages of having a simple structure, good stability, and strong applicability. However, the traditional linear-array Charged Coupled Device (CCD) spatial-filtering velocity measurement method requires that the direction of the CCD array be the same as the direction of motion of the object whose velocity is to be measured. Therefore, this method is not suitable for measuring complex flow fields. To solve this problem, this study proposes a spatial-filterin Keywords：optical measurement;spatial filtering;area CCD;particle flow;spectrum correction;image speed measurement- 99
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Published：2020-07-05 -
Fabrication and application of dual-wavelength infrared transmission-type interferometer
Abstract：A 635 nm and 10.5 μm dual-band coherent optical infrared transmission interferometer was designed. This integrated system employs a visible semiconductor laser at 635 nm and an infrared semiconductor laser at 10.5 μm as the interference light source. Through tests with this integrated system, a common optical path between the interference of the visible light band and the infrared light band could be determined. The common mode of the mechanical phase shift system and the visible light co-alignment were use Keywords：optical testing;interferometry;double diode laser wavelength;infrared interferometer;off-axis aspheric surface- 77
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Published：2020-07-05 -
Coarse co-phasing detection of segmented mirrors
Abstract：To realize a time-efficient and wider range of measurements of piston errors of segmented mirror, a method based on the coherence of the Fraunhofer diffraction pattern of two half circles in visible light was proposed to detect the piston errors of the segmented mirror. In this method, the noncoherent diffraction pattern of the two half circulars was used as a template, and the cross-correlation algorithm was used to calculate the cross-correlation coefficient between the template pattern and the actual dif Keywords：astronomical optics;telescope;active or adaptive optics;co-phasing detection- 106
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Published：2020-07-05 -
Optical design of three-mirror beam shaping scanner for optical coherence tomography
Abstract：A system of three mirrors was proposed for beam shaping. This assembly of mirrors can convert a Gaussian distribution spot into a uniform linear distributed toroidal surface with conic and high order terms. Standard surfaces were utilized to control the beam propagation direction and energy distribution. The default merit function and optical modeling were combined to incorporate operands to optimize the system's efficiency. Rectangular and line fields with uniform energy distribution in one direction were successfully demonstrated. This has direct application to illumination or scanning in optical coherence tomography. In the case of the latter, the line is linear within a specific scanning range of 10 mm×11 mm of the first mirror. It can be concluded that this system can facilitate a simpler CT setup and is effective over a wide range of wavelengths.Keywords：optical system design;optical coherence tomography;laser beam shaping;mirror system design- 89
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Published：2020-07-05 -
Optical system for passive laser fusion shock wave velocity measurement
Abstract：To meet the increasing demands of Inertial Confinement Fusion (ICF) shock velocity passive measurement, an optical collection system was designed. The 300-800 nm apochromatic optical system was designed using fluoride optical glasses, which have high transmission in the ultraviolet band. The imaging system has two lenses. The light beams between the two lenses were parallel, and the distance between the lenses could be varied to meet the size demands for different assembly positions. The machine visions on Keywords：optical system design;shock velocity;Doppler shift;streaked optical pyrometer- 112
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Published：2020-07-05 -
Compressed sensing detection of optical spatial modulation signal in turbulent channel
Abstract：The maximum likelihood detection algorithm produces the best bit error performance in optical spatial modulation systems, but the complexity of the decoding process limits its application in practical settings. To address this deficiency, a transmission signal with sparse characteristics was generated by mapping an optical spatial modulation laser vector and a pulse position modulation vector together. A compressed sensing-based optical spatial modulation signal detection method was proposed based on the re Keywords：wireless optical communication;optical spatial modulation;Compressed sensing;signal detection algorithm- 116
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Published：2020-07-05
Modern Applied Optics
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Design and optimization of high-speed swing mirror with three reflectors on airborne whiskbroom scanning spectrometer
Abstract：Aiming at fulfilling the requirement of 25 Hz high scanning frequency of the airborne whiskbroom scanning spectrometer, a swing mirror with three reflectors is designed. Firstly, by revealing the relationship between the reflection area and the deviation of the rotation axis and comparing performance of several swing mirrors with the different numbers of reflectors. The arrangement of three reflectors around the rotation axis of swing mirror was adopted. Thus rotating at a speed of 600 r/min the mirror was Keywords：airborne whiskbroom scanning spectrometer;high rotational speed;uniform speed sweep;swing mirror with three reflectors- 103
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Published：2020-07-05 -
Measurement and identification of geometric errors for turntable-tilting head type five-axis machine tools
Abstract：In order to reduce the influence of the geometrical error of rotary axis on the accuracy of turntable-tilting head type five-axis machine tools, a Position-Independent Geometric Error(PIGE) measurement and identification method based on the measurement of the Double Ball Bar(DBB) is proposed. Firstly, based on multi-body system theory and homogeneous coordinate transformation method, the position-independent geometric error model of turntable-tilting head type five-axis machine tool position was established Keywords：five-axis machine tool;rotary axes;position-independent geometric error;error measurement;error identification- 137
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Published：2020-07-05 -
Structural stability optimization for vacuum chamber assembly in inertial confinement fusion facility
Abstract：Structural stability of vacuum chamber assembly significantly affects alignment precision of laser beam and target in Inertial Confinement Fusion(ICF) facility. Structural stability optimization for vacuum chamber assembly is processed in this paper. Dynamic performance of vacuum chamber assembly was first studied. Natural frequencies and vibration modes were analyzed. Then influences of supporting frusta structural parameters on natural frequencies were investigated. And the model of influence was established. Last, the optimization of the supporting frusta structural parameters was carried out and the first natural frequency was improved to 14.44 Hz that satisfied the stability requirement of the ICF facility.Keywords：ICF facility;vacuum chamber assembly;structural stability- 75
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Published：2020-07-05 -
Improvement of Monte Carlo method for robot workspace solution and volume calculation
Abstract：This study proposes an improved Monte Carlo method, considering that the traditional method lacks precision while calculating the workspace of a robot. The improved Monte Carlo method comprises two stages. In the first stage, a seed workspace is generated using the traditional Monte Carlo method. In the second stage, the seed workspace is expanded based on the normal distribution, and each region in the obtained workspace can be accurately described by setting an accuracy threshold in the process of expansi Keywords：robot;workspace;Monte Carlo method;normal distribution;voxel- 142
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Published：2020-07-05 -
Clearance measurement equipment for air bearing of dynamic pressure gyro motor
Abstract：The clearance size of the air bearing of the dynamic pressure gyro motor is an important index to determine the motor performance and running stability. To improve the precision, automation degree, and rapid batch measurement capacity of the clearance measurement for the dynamic pressure gyro motor, a measurement equipment was developed. In this work, the internal clearance was transformed into an external micro-displacement by applying external force to the rotor. The equipment, designed based on a modular Keywords：micro displacement measurement;dynamic pressure gyro motor;bearing clearance;automatic force application- 139
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Published：2020-07-05 -
Water-jet assisted laser precision processing of Si3N4 ceramics
Abstract：Solution-assisted laser processing was proposed to solve the problem of surface quality in engineering ceramics during laser processing. First, the energy transfer of the laser through a water layer, heat transfer of the laser acting on an underwater solid matter, and action mechanism of the auxiliary laser processing of the hydrostatic water and water jet were analyzed after referring to relevant research at home and abroad. A complex beam-processing system of the parabola jet and ultrasonic-vibration-assi Keywords：water jet assisted laser processing;surface quality;experimental research;Si3N4- 184
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Published：2020-07-05 -
Ultrasonic detection of rich-resin in low-porosity CFRP
Abstract：To satisfy the demand of rich-resin defect detection in the so-called low-porosity carbon fiber reinforced composite (CFRP) with porosity close to zero, an ultrasonic testing methodology was proposed in this article. The denoising methods, attenuation suppression method, and 3D imaging technology for rich-resin identification are investigated, and low-porosity CFRP rich-resin detection software was developed. The rich resin was detected in four steps. First, the resonant frequency was estimated, and the hig Keywords：low-porosity Carbon Fiber Reinforced Plastic (CFRP);rich-resin;variational mode decomposition;multi-threshold Otsu method;multi-view imaging;software development- 107
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Published：2020-07-05 -
Dynamic hysteresis modeling and LQG optimal controller design of piezoelectric actuators
Abstract：To improve the dynamic performance of a piezoelectric fast steering mirror in the space-telescope image-stabilization system, the dynamic hysteresis compensation and control of a piezoelectric actuator are investigated. According to the inversion complexity of the PI model based on the generalized Play operator and the asymmetry of hysteresis curves, a PI inverse model based on the generalized Stop operator is constructed to compensate the hysteresis nonlinearity. The Hammerstein model is applied to model t Keywords：piezoelectric actuator;dynamic hysteresis;hammerstein model;generalized stop operator;LQG optimal control- 88
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Published：2020-07-05 -
Multi-objective optimization on mechatronic system of a light and small pan-tilt system for unmanned aerial vehicle application
Abstract：The light and small pan-tilt system of a multi-rotor unmanned aerial vehicle is a complicated electromechanical servo system that requires a number of desirable properties such as light weight and rapid response to be realized. We focus on the inherent limitations of the traditional methods in the electromechanical servo-system design to present a multi-objective optimization method for a mechatronic system based on the bandwidth. For the structure system, seven-dimensional parameters were selected using se Keywords：light and small pan-tilt;electromechanical multi-objective optimization;approximate model;bandwidth- 93
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Published：2020-07-05 -
Gravity compensation optimization algorithm for large aperture spatial optical telescope
Abstract：Following the increase in the aperture of space optical telescopes, the inconsistency in space and ground mechanical environment results in serious degradation of the system image quality in orbit. Gravity needs to be compensated during the alignment and test procedure of a space telescope. However, quantitative analysis and optimization methods for unloading the point coordinate have not been completely developed. First, the deformation mechanism of a large-aperture telescope under 1g gravity was studied. Keywords：large-aperture spatial optical telescope;alignment and teasting;0 g gravity simulation;unloading point coordinates- 112
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Published：2020-07-05
Micro/Nano Technology and Fine Mechanics
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Template matching with multi-scale saliency
Abstract：Traditional template matching methods suffer from heavy occlusion, intense background change and non-rigid deformation. A multi-scale saliency template matching method is proposed in this article in order to deal with such conditions. The method extracted saliency and multi-scale features in parallel. On the one hand, the template and the target images were first divided into grids of different scales using spatial pyramid model. Deformable Diversity Similarity (DDIS) was calculated under such different gri Keywords：template matching;deformable diversity similarity;salient object segmentation;spatial pyramid model- 111
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Published：2020-07-05 -
Early warning of illegal video chats based on camera source identification
Abstract：Majority of the techniques currently employed for detecting illegal videos were primarily based on video content analysis, which in turn was computationally intensive and cannot be applied for real-time detection of large video traffic flow. To address the said issue, the novel approach of real-time video source identification was proposed in this paper for preventing the transmission of illegal videos. In contrast to conventional approached based on content analysis, the proposed approach blocked the trans Keywords：camera source identification;photo response non-uniformity;ensemble learning;live video streaming- 73
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Published：2020-07-05 -
Night-vision image coloration fusion in oRGB color space
Abstract：A novel image coloration fusion method in oRGB color space is presented for the enhancement of thermal infrared and visible night-vision images. We chose to construct a pseudo-color image and to execute color transfer in the same oRGB color space because this new space is reasonably simple, has intuitive axes, and is well-suited for computational applications. In order to preserve detail information from the source images in the final coloration image, the luminance component of the pseudo-color image is as Keywords：coloration fusion;color transfer;infrared image;oRGB- 139
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Published：2020-07-05 -
Time series prediction method based on Pearson correlation BP neural network
Abstract：In order to realize the over fitting problem existing in Back Propagation (BP) neural networks, a neural prediction model based on Pearson correlation was designed. It replaces the error function in a BP neural network based on error back propagation with the Pearson correlation function. By means of gradient ascent, the adjustment of connection weights and biases in training process is derived. Meanwhile, momentum is added to this adjustment to improve the convergence speed of the network. The Pearson corr Keywords：Pearson correlation;BP neural network;time series prediction- 106
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Published：2020-07-05 -
Single image super-resolution reconstruction algorithm based on image self-similarity and multi-task Gaussian process regression
Abstract：In the domain of single image super-resolution, algorithms based on Gaussian process regression neither exploit the association relationships among similar patches, nor do they discriminate between these patches with similar properties to augment the volume of the training set, which leads to obvious noise and artifacts in reconstructed high-resolution images. To overcome this problem, a new super-resolution algorithm based on multi-task Gaussian process regression is proposed. This algorithm introduces the Keywords：single image super-resolution;multi-task learning;Gaussian process regression;image self-similarity;optimal estimation- 114
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Published：2020-07-05 -
Using PHOG fusion features and multi-class Adaboost classifier for human behavior recognition
Abstract：In order to solve the problem that energy image species (EIS) are susceptible to human movement time and position shift, i.e., it is difficult to describe the details of human behaviors, in this paper a method of human behavior recognition was present based on pyramid gradient histogram (PHOG) fusion features and a multi-class Adaboost classifier. This method first calculated the average motion energy image (AMEI) and the enhanced motion energy image (EMEI) of an object's silhouette images after human body Keywords：human behavior recognition;Average Motion Energy Image (AMEI);Enhanced Motion Energy Image (EMEI);Pyramid Histogram of Oriented Gradients (PHOG);Look-Up-Table type Real Adaboost (LUT-Real Adaboost)- 78
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Published：2020-07-05 -
Automatic enhancement of remote sensing images based on adaptive quantum genetic algorithm
Abstract：Considering the problem that traditional image enhancement methods based on a normalized incomplete beta function (NIBF) have difficultly obtaining optimal parameters automatically and that enhancement effects are limited by the dynamic range of the image, a method of NIBF remote sensing image automatic enhancement based on an adaptive quantum genetic algorithm was proposed. First, from the image color depth, the maximum and minimum spectral measurement levels were introduced into the image to be enhanced t Keywords：image enhancement;Normalized Incomplete Beta Function (NIBF);adaptive quantum genetic algorithm;parameter selection- 89
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Published：2020-07-05 -
Real-time coaxial color fusion system
Abstract：Natural color fusion of long-wave infrared and visible images is helpful to observers for quick perception of the environment and discovery of targets. The coaxial optical structure enjoys the unique advantages in terms of improving the quality of the fused image and simplifying the registration algorithm. According to the requirements in battlefield detection, surveillance, and so on, a real-time coaxial color fusion system based on TMS320DM642 DSP and ATmega32 MCU was designed in the present work. In the Keywords：coaxial system;color fusion;CbCr look-up table;FOV matching;optical axis calibration- 112
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Published：2020-07-05 -
Three-dimensional model restoration with shape-constrained sample filling
Abstract：To solve the problems of irregular hole shape and low accuracy of surface registration in an incomplete 3D model-repair process, a model-repair method was proposed to effectively maintain the natural hole boundary and restore the model surface details. First, we traced all points with unequal numbers of one-neighborhood edges and one-neighborhood triangles to detect the hole boundaries of the model. A method based on 2D mesh numbers was proposed to determine the matching candidate set for the incomplete mod Keywords：model restoration;model contour;model similarity;shape constrained;non-rigid transformation- 114
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Published：2020-07-05
Information Sciences
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