共查询到20条相似文献，搜索用时 140 毫秒
1.
基于单片机的步进电机控制系统 总被引：5，自引：1，他引：4
陈石龙 《宁德师专学报(自然科学版)》2009,21(1):16-19
采用基于AT89C51单片机为核心,包括系统硬件设计和系统软件设计,来实现对步进电机的控制.系统为一自动控制系统,通过按键向单片机输送控制信号,控制步进电机的转速和正反转,以及控制悬挂物体在做自行运动.采用AT89C51单片机指令系统进行编程来实现软件部分.经测试,系统能实现上述功能. 相似文献
2.
设计了一种智能循迹小车,介绍了系统总体,STC12C5A60S2单片机为智能小车控制核心、电源模块、电机驱动电路、循迹传感器模块及相应软件设计方案。通过红外反射式传感器TCRT5000检测路面信息,单片机内部程序控制L298N全桥驱动芯片结合单片机输出的PWM信号控制小车左、右轮电机的运动速度,从而使小车能够沿着引导轨迹自动行驶,实现小车自动循迹的目的。试验结果表明,整个系统的电路结构简单,可靠性高,实现了预期的智能循迹小车功能。 相似文献
3.
为了满足实验实践教学改革的相关要求,设计了一种悬挂式定位实验系统。该系统基于开环控制元件步进电动机、STM32单片机、红外光电传感器以及uc GUI等技术,能够实现物体在指定的范围内完成指定运动,比如循迹运动、画圆运动、定点运动等。实验操作者通过在触摸屏上选择运动模式并输入坐标即可观察到实验现象。本设计完成了该系统的硬件设计和软件设计,并对相关功能进行了测试。该系统已应用于实验教学,学生反映良好,有效提高了学生实验的积极性和创新性。 相似文献
4.
针对智能小车自动循迹的要求,提出由车体模块、电源模块、单片机控制模块、电机驱动控制模块、电机模块、传感器模块等构成智能小车硬件系统,利用Keil u Vision2集成开发工具进行C51高级语言程序设计,开发出控制软件。利用红外传感器检测小车的循迹轨道,并以STC89C52RC单片机为控制芯片根据接收的轨迹信息发出相应的控制指令,通过L298N驱动控制模块来驱动小车以实现循迹的系统总体设计方案,并采用了"反转式转向模式"和"反转式刹车模式"。实验结果表明,该智能小车硬件系统各模块选择合理,控制软件高效可行,小车整体性能优良,成功实现了自动循迹的功能,且采用"反转式转向模式"和"反转式刹车模式"实现了极好的转向及刹车效果。 相似文献
5.
本文采用AT89S51单片机作为核心器件实现对物体运动轨迹的自动控制,通过控制步进电机实现对悬挂物位置的精确测量,并引入局部闭环反馈控制环节对误差进行修正．以达到对物体的控制和对坐标点的准确定位．采用单片机控制步进电机,以实现对电机的转速、转向、启停等多种工作状态进行快速而准确的控制．在实际生产中大大减少了生产所消耗的时间,增强了系统的通用性和灵活性、成本也大大降低．从而提高了工厂的生产效率． 相似文献
6.
《南阳师范学院学报》2020,(1):31-35
该设计以STC89C51单片机作控制核心,通过TB6612FNG电机驱动芯片控制电机,配合红外传感器、舵机、颜色识别等元件及供电装置构成智能物料搬运小车.可实现自主循迹且将不同颜色的物块运送到指定位置的目的. 相似文献
7.
《实验室研究与探索》2016,(8)
用MSP430单片机设计了一种智能循迹运料小车,介绍了运料方式和系统总体设计框架。小车装料并检测有料后,通过红外反射式传感器TCRT5000检测路面信息并反馈给单片机,单片机输出PWM信号并通过L298N全桥驱动芯片控制小车电机运转,从而控制小车的路径和速度。当到达终点后,停车等待卸料,检测卸料完成后,返回起点重新装料,从而实现小车循迹运料的目的。小车运行还可通过红外遥控人为控制。试验结果表明,整个系统的电路结构简单,可靠性高,运行灵活方便,实现了预期的智能小车循迹运料功能。 相似文献
8.
9.
本文设计的自动循迹小车利用各种传感器原件,如红外传感器、循迹模块、超声波模块、温度传感器等对外部信息进行采集后传递给单片机.单片机再解析反馈的内容并下达指令给电机.在火焰检测传感器检测到火源时下达指令让风扇转动实现灭火,从而驱动电机控制小车按照事先预定的轨道行驶,在行驶过程中还可实现循迹、避障、遥控等功能.系统经过软硬件设计实现了预期的功能,具有无须人为干预、效率高、针对性强等优点. 相似文献
10.
11.
针对普通轮式机器人在运动和控制等方面的限制,设计并实现了轮式滑动转向移动机器人,该机器人具有结构简化、运动灵活、可靠性高、可控性好等特点.基于EKF实现单目视觉和IMU数据融合,运用SURF实现被跟踪对象特征的检测与匹配,结合垂直线等环境特征获取Range/Depth信息以及被跟踪对象及道路转弯信息.实验表明:该系统及相关算法有较强的实时性和鲁棒性. 相似文献
12.
随着移动物体定位技术的快速发展,运动物体的定位是目前最热门的研究课题之一。对物体进行定位、跟踪、识别和监测,获得物体位置参数(如地理坐标、速度、加速度及运动物体的轨迹等),进一步对参数进行分析与处理,实现对运动物体行为的解读,从而实现更高一级的数据融合。 相似文献
13.
Diana S.Y. Tham Alison Rees J. Gavin Bremner Alan Slater Scott P. Johnson 《Child development》2021,92(1):324-334
Infants' oculomotor tracking develops rapidly but is poorer when there are horizontal and vertical movement components. Additionally, persistence of objects moving through occlusion emerges at 4 months but initially is absent for objects moving obliquely. In two experiments, we recorded eye movements of thirty-two 4-month-old and thirty-two 6-month-old infants (mainly Caucasian-White) tracking horizontal, vertical, and oblique trajectories. Infants tracked oblique trajectories less accurately, but 6-month olds tracked more accurately such that they tracked oblique trajectories as accurately as 4-month olds tracked horizontal and vertical trajectories. Similar results emerged when the object was temporarily occluded. Thus, 4-month olds’ tracking of oblique trajectories may be insufficient to support object persistence, whereas 6-month olds may track sufficiently accurately to perceive object persistence for all trajectory orientations. 相似文献
14.
研制了一种光电经纬仪的跟踪测量系统 .该系统可以在可见和红外波段对飞行目标进行跟踪测量 ,还可对测量结果实时输出 .利用误差跟踪控制和共轴跟踪控制技术的多模控制方式 ,可以提高系统自动跟踪的稳定性、跟踪精度和各工作方式间的平滑切换 ,使整个系统的综合性能得到完善 .仪器的速度、加速度分别超过 6 0deg/s、90deg/s2 .该跟踪控制测量系统目前已成功应用于光电经纬仪中 相似文献
15.
《The Journal of educational research》2012,105(2):64-70
AbstractThe role of sensory feedback factors in determining learning and memory was investigated in terms of the effects of four different modes of movement control of sensory input on memory of stimulus patterns-i.e., (1) visual tracking of the pattern without manual control, (2) parallel pursuit tracking of the pattern with a hand-con- trolled visual cursor, (3) opposed pursuit tracking of the stimulus pattern with a hand-controlled visual cursor, and (4) compensatory negative feedback tracking in which the subject observed only the error of tracking the stimulus pattern. Results indicated that mode of sensory feedback control of sensed input of stimulus patterns during learning determined immediate memory, and that memory was superior for modes of feedback control in which the pattern of stimulation and of movement could be compared. The main conclusion was that the processes of active and passive learning and their role in determining learning and memory are specifiable and predictable as variable forms of movement-controlled sensory feedback. 相似文献
16.
INTRODUCTIONObjecttrackingisachallengingandimpor tanttaskincomputervision .Someofthemorepopularapplicationsincludevideosurveillanceinstrument,roboticcontrol,andautonomousve hicularnavigation .Trackingalgorithmsfindhowanimageregionmovesfromoneframetothenext.Thisimpliestheexistenceofanerrorfunc tiontobeminimized ,suchasthesumofsquareddifferences (SSD)betweenthetwoimagere gions.Thiserrorfunctionistheresultofmakingthe“constantbrightnessassumption” .Yet,quiteoftenweareinterestedintrackinga… 相似文献
17.
在复杂地物类型背景条件下,多目标跟踪算法通常表现出目标识别与跟踪能力较差问题,特别在被其它地物遮挡后目标跟踪丢失更严重。提出一种改进的基于多源特征提取与特征融合的多目标跟踪算法。为提高目标在复杂背景下的空间分辨力,充分利用对异类物体判别能力较强的高层特征和针对同类不同物体判别能力较强的浅层特征,提高复杂背景下地物目标的识别能力。同时,为了解决物体被遮挡后导致跟踪算法丢失目标问题,利用滤波器获得追踪目标的空间尺度大小,提高跟踪算法的准确性与可靠性。实验表明,多目标跟踪算法识别目标的准确性可达87.5%,误差在[±2.31%]左右,具有良好的尺度估计效果。 相似文献
18.
This novel method of Pedestrian Tracking using Support Vector (PTSV) proposed for a video surveillance instrument combines the Support Vector Machine (SVM) classifier into an optic-flow based tracker. The traditional method using optical flow tracks objects by minimizing an intensity difference function between successive frames, while PTSV tracks objects by maximizing the SVM classification score. As the SVM classifier for object and non-object is pre-trained, there is need only to classify an image block as object or non-object without having to compare the pixel region of the tracked object in the previous frame. To account for large motions between successive frames we build pyramids from the support vectors and use a coarse-to-fine scan in the classification stage. To accelerate the training of SVM, a Sequential Minimal Optimization Method (SMO) is adopted. The results of using a kernel-PTSV for pedestrian tracking from real time video are shown at the end. Comparative experimental results showed that PTSV improves the reliability of tracking compared to that of traditional tracking method using optical flow. 相似文献
19.
This study explored the comprehension and production of sentences derived by syntactic movement, in orally trained school-age Hebrew-speaking children with moderate to profound hearing impairment, aged 7;8-9;9 years. Experiments 1 and 2 tested the comprehension of relative clauses and topicalization sentences (with word orders of OVS [object, verb, subject] and OSV [object, subject, verb]) using a sentence-picture matching task. Experiments 3 and 4 tested the production of relative clauses using two elicitation tasks. Experiment 5 tested the comprehension of relative clauses with and without resumptive pronouns. As a group, the children with hearing loss failed to understand object relatives and OVS topicalization sentences. In the production tasks they either avoided producing a sentence with syntactic movement, by using a relative clauses with a resumptive pronoun instead of a gap or by producing a sentence without a relative clause, or produced ungrammatical sentences. They understood correctly object relatives with resumptive pronouns, which are not derived by movement. Both comprehension and production of the hearing-impaired group was significantly different from that of the hearing control group. Individual performance was strongly correlated with the age of intervention: only children who received hearing aids before the age of 8 months performed well in the comprehension tasks. Type of hearing aid, duration of use of a cochlear implant, and degree of hearing loss did not correlate with syntactic comprehension. 相似文献
20.
针对目标跟踪中因严重遮挡、变形、快速运动等因素导致的跟踪失败问题,提出一种基于相关滤波的重检测跟踪算法。首先使用相关滤波算法Staple对目标进行位置估计,然后构造一个检测滤波器对Staple算法跟踪结果进行置信度检测,将检测分数作为跟踪结果的置信度评估结果。若检测分数小于给定阈值,则激活在线SVM分类器对跟踪结果进行重检测。同时用检测滤波器对SVM分类结果进行检测,若检测分数大于Staple跟踪算法检测分数,则采用SVM的跟踪结果。在基准数据集OTB-2013上的实验结果表明,该算法精度达到80.2%,成功率达到60.6%,整体性能优于其它6种对比算法。 相似文献