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1.
介绍了基于MC9S12XS128单片机控制的智能车系统,该系统以CCD摄像头传感器作为路径识别装置,通过图像识别提取道路黑线信息,计算出反应道路形状的舵机控制量,对舵机进行控制。对智能车寻线舵机控制系统的软件设计思路和控制算法思想等进行了详细的论述。测试结果表明智能车能准确稳定地跟踪引导黑线行驶,该算法能够很好地对智能车进行控制。  相似文献   

2.
高精度、高速度、大前瞻的路径采集系统能为智能车提高更精准、更及时和更丰富的赛道信息,是智能车获取更大速度的关键。针对激光传感器的路径采集模块,设计了一种路径识别算法,经过实验,该算法可以使智能车准确、及时地获取赛道信息,提升了智能车的速度和稳定性。  相似文献   

3.
李东新  魏旋 《信息技术》2012,(6):188-190
以单片机为主控芯片的智能导航车系统,采用单片机MC9S12DG128B作为核心,小型直流电机作为驱动元件。通过增量式旋转编码器测速,构成带速度反馈的伺服控制系统。利用增量式PID算法进行速度调节,使用舵机控制智能车的转向,系统以CCD摄像头作为路径识别装置,通过图像识别提取路径信息。并且提出引入动态阈值的计算方法,经过测试证明:系统能很好地完成路径识别,具有良好的抗干扰性。  相似文献   

4.
基于MC9S12DG128单片机的智能寻迹车设计   总被引:2,自引:0,他引:2  
设计了一种基于飞思卡尔MC9S12DG128单片机控制的智能寻迹车系统.该系统以MC9S12DG128为控制核心,采用CCD图像传感器检测路面信息,利用加速度传感器检测加速度,红外传感器检测速度,采用PID算法控制智能车直流驱动电机和模糊控制算法控制舵机转向,从而实现智能车快速稳定地寻黑线行驶.  相似文献   

5.
在智能车系统的设计中,路径识别的准确性直接影响到智能车能否正确地行驶。以摄像头作为路径识别的传感器能够有效地提高智能车的前瞻性,但原始图像的数据量相对单片机来说是比较庞大的。本文采用了硬件分频的方法对图像数据进行了有效的压缩,并对图像对进行二值化和去除噪声的预处理。大量的实验结果表明,该方案能够实现路径识别的正确性与快速性。  相似文献   

6.
路径识别系统是智能车的“眼睛”。是智能车获取环境信息,实现自动控制的基础。针对路径识别系统高精度、高速度的要求,分别设计了智能车光电传感器路径识别系统和摄像头传感器路径识别系统,并对两类路径识别系统在硬件设计和软件算法上针对各个性能指标进行了比较。  相似文献   

7.
基于CMOS摄像头的智能车路径跟踪系统设计   总被引:1,自引:1,他引:0  
李国柱 《现代电子技术》2011,34(18):12-14,17
设计了一种能自动识别和跟踪路径的智能车系统。用以MC9S12XS128作为核心控制器,利用COMS图像传感器OV6620作为路径信息采集装置,通过对采集图像进行二值化处理、去噪操作、边缘检测和断点修补后提取出路径中心信息。利用最小二乘法对路径中心信息进行直线拟合,根据拟合直线的参数计算舵机控制量。对舵机采用PD控制算法,根据舵机转向角设定小车的速度,并对小车实行转角和速度的实时控制。实验证明,该智能车系统能够沿着黑色赛道快速稳定地自动行驶,实现了路径识别与跟踪。  相似文献   

8.
基于红外激光管的智能车设计   总被引:1,自引:0,他引:1  
介绍了一种基于红外激光管的快速路径识别智能车系统.该智能车使用红外激光管作为路径检测装置,PD算法控制舵机转向,增量式PID算法控制直流电机驱动智能车前进,同时采用模糊控制算法进行变速,通过加长舵机转臂加速舵机响应,解决了系统的滞后问题,使小车能按照任意给定的黑色引导线平稳地寻迹.  相似文献   

9.
设计了一种基于飞思卡尔MC9S12DG128单片机控制的智能寻迹车系统。该系统以MC9S12DG128为控制核心,采用CCD图像传感器检测路面信息,利用加速度传感器检测加速度,红外传感器检测速度.采用PID算法控制智能车直流驱动电机和模糊控制算法控制舵机转向,从而实现智能车快速稳定地寻黑线行驶。  相似文献   

10.
在输入信号及硬件有限的条件下,运用一种有效寻迹、转向与速度控制算法,对于提高智能车的运动性能,有着重要的作用.为提高智能车的性能,对控制算法进行了研究.针对传统的路径离散识别算法只能获得少而离散化路径信息的问题,提出了采用连续化路径识别算法对路径信息采集;针对制约智能车快速寻迹的转向及速度问题,提出了采用优化的PID控制算法对智能车的舵机和电机进行控制.实验结果表明,与传统方法相比,采用连续的信号、基于反馈控制的PID控制算法,智能车的快速性、灵敏性、稳定性明显改善,从而验证了算法的可行性.  相似文献   

11.
DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.  相似文献   

12.
This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel's.  相似文献   

13.
The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.  相似文献   

14.
Today, micro-system technology and the development of new MEMS (Micro-Electro-Mechanical Systems) are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.  相似文献   

15.
The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.  相似文献   

16.
From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.  相似文献   

17.
Waveguide multilayer optical card (WMOC) is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling & processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic (VB) language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.  相似文献   

18.
It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output(MIMO) communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.  相似文献   

19.
The effect of laser microbeam trapping the bioparticles has been appfied widely in the biology .However the micromechanism of the acting that realizes the laser-microbeam trapping bioparticles is still lacking. In this paper ,the act microchenism of the gradiant force of laser microbeam for the bioparticles is analysed by means of quantum theory ,The result accords with our experiment.  相似文献   

20.
A shape measurement based on ESPI by using carrier is presented. When the tested object is tilted with a small angle, the carrier pattern containing altitude information is formed on the object surface. By using the carrier pattern captured by a CCD camera, the phase of the object can be derived by Fourier transform and the shape measurement is realized. The principle of the method is introduced and proved by an experiment.  相似文献   

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