Advanced Materials Research Vols. 591-593

Abstract: Ship measurement and control device check equipment has realized the intelligent check of ship measurement and control device’s functional modules which have the function of parameter measuring, data acquisition, calculation, communication and power supply.It need to complete multiple parameters’data acquisition and operation above all, this paper introduces the process of data acquisition and operation of industrial control computer’s PCI cards by using VC program. The PCI cards include PCI-1713,PCI-1724,PCI-1758UDI,PCI-1758UDO,PCI-1612CU.It realizes the data acquisition and operation of industrial control computer’s analog input\output PCI cards,digital input\output PCI cards and communication PCI card. It completes the data acquisition function of check equipment. it satisfys the need of realtime and high accuracy of check equipment,it can used to other data acquisition systems.

Abstract: This article starts from energy saving and improving energy efficiency, analyzes the characteristics of the pump and collects the pipe network pressure periodically by the pressure sensor, and then we can get the differential pressure signal and send it into fuzzy controller after comparing the pipe network pressure with the set pressure. After a series of fuzzy arithmetic and solution of fuzzy arithmetic, the fuzzy controller sends a precise control into the PID regulator to control output frequency of the frequency converter, so as to achieve the purpose of pump speed controlling and energy-saving.

Abstract: The vehicle sensor information and road side sensor information will be collaborative used in traffic management and control. In order to improve the comprehensiveness and economy of the traffic and road conditions’ information collection, we focus on the intelligent roadside system in this paper. Firstly, we analyse the functions of the intelligent roadside system. Through the analysis of the detection range, detection accuracy, price and applicable conditions of similar sensor, we delineate the selection range of the intelligent roadside sensor. Then we determine the layout scheme of the testing equipment sensors for different functions according to different types of network structure. Finally, we apply similarity analysis to optimize the configuration density to reduce system cost by selecting the sensor layout-intensive sections.

Abstract: Embedded sensors are an emerging trend in mobile consumer devices. In this work a new algorithm is derived for the onboard calibration of three-axis magnetometers. The proposed calibration method is written in the sensor frame, and compensates for the combined effect of all linear time-invariant distortions, namely soft iron, hard iron, three-dimensional sensor non-orthogonally, scale factors, null-shift, arbitrary bias, among others. The new algorithm can be separated into two steps: In the first step, obtain the ellipsoid fitting parameters from comparing the difference between the measured value and the actual vector. In a second step, a calibration algorithm is adopted to compensate for magnetometers distortions. According to the model parameters the measured data is corrected to improve the precision of magnetometer. Simulation and experimental results with sensors data are presented and discussed, supporting the application of the algorithm to commercial and military platforms.

Abstract: The differential stress distribution of rectangular diaphragm with different sizes is simulated and analyzed using ANSYS. The results show that the maximal differential stress region on the rectangular diaphragm is located at the diaphragm center and the long side center, and also it gradually increases as the length-width ratio decrease. When the ratio is less than 1:2.2, the increase degree is not obvious and even falls slightly. According to this, the length-width ratio of the rectangular strain diaphragm was optimized as 1:2.2. Furthermore, the influence of stain diaphragm with different thicknesses and temperatures in differential stress distribution is discussed. It proves that the differential stress of the diaphragm is less affected by temperature, when the diaphragm thickness is properly chosen. The present results will provide the prerequisite for the design of miniature high-temperature pressure sensor in the future.

Abstract: Recent progress in structure-from-motion (SfM) has led to robust techniques that can operate in extremely general conditions. However, a limitation of SfM is that the scene can only be recovered up to a similarity transformation. We address the problem of automatically aligning 3D point clouds from SfM reconstructions to orthographic images. We extract feature lines from 3D point clouds, and project the feature lines onto the ground plane to create a 2D feature lines. So we reduce this alignment problem to a 2D line to 2D line alignment(match), and a novel technique for the automatic feature lines matching is presented in this paper.

Abstract: In this paper, a method of calculating the parameters of equivalent circuit model of linear induction motor(LIM) is proposed based on numerical analysis and finite element method(FEM). The method is proved accurately through the traditional removed and locked method. Material change of reaction plate’s effect on how equivalent circuit’s parameters change and the influence on control characteristics are analyzed through this method. A control algorithm to compensate the effect of material change is presented. The compensation is based on equivalent circuit parameters variation and indirect vector control. Simulation results have shown the algorithm had good performances

Abstract: Testing behavior recognition algorithm is a key technology of machine vision, tradition way to generate video test sequences has many defects, and a new way based on cloud model is putted forward. Moving object parameters such as moving types in image sequence were collected; these parameters were inputted into backward cloud generator. The quantitative representation of qualitative concept, expectation Ex,entropy En, super entropy He were gotten. These parameters were used to simulate the moving object behavior representation parameters. Ex, En, He were inputted into normal cloud generator, every moving object was designed as agent, agent can adjust behavior parameters by feeling environment and auto excitation. These behavior parameters were used to evaluate some classics algorithm. The experiment show that: the time cost of new way is 10% of tradition way, and two methods have same effect on testing algorithm recognition rate and algorithm recognition speed, and new way is superior to tradition way on testing algorithm robustness.

Abstract: The camera calibration is an essential part in the machine vision,the camera calibration is to establish the relationship between the camera image pixellocation and scene position,the approach is based on the camera model,solving the model parameters of the camera image coordinates and world coordinates from the known feature points. Using the camera calibration method based on quadratic curve,this article selects a template consists of two concentric circles and two concentric ovals.We shot 4 images in different directions,and use different combinations of three of the four images to calibrate camera.Thus we can calculatethe various parameters of the camera.

Abstract: This paper focuses on agile turn control for air-to-air missile flying in the horizontal plane. The attitude dynamics is discussed and variable structure control (VSC) method for attitude control is analyzed. After analysis of the dynamic function about velocity angle, a staged control method using VSC based on reaction jet control system (RCS) is proposed to achieve fast change of velocity direction and attitude in a short time. The simplex method is used for trajectory optimization. The simulation results show the feasibility of the staged control method which makes the missile turn faster than the situation of attitude control method. The new method demonstrates that RCS is able to control the missile to realize 180°change both for the velocity angle and attitude angle.