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单片机嵌入式技术是一种非常经典的嵌入式微控制器,它必须满足对象系统的环境要求、满足对象要求的最小软硬件配置、满足对象系统的控制要求等条件,由硬件层、中间层、系统软件层和应用软件层四部分构成。单片机嵌入式技术具有非常广阔的应用前景,目前已经运用于工业控制、交通管理、信息家电等多个领域。本文阐述了单片机嵌入式技术的应用与发展,并对其发展前景进行分析。 相似文献
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随着煤矿电气自动化控制技术的快速发展,单片机由于其超强的编程能力与逻辑运算等功能,在煤矿电气系统的技术改造中发挥了无法替代的作用。该文通过目前煤矿电气自动化系统的设计要求,详细阐述了单片机在煤矿自动化控制技术中的应用过程,并同步对煤矿电气自动化系统中的其他控制模块进行了分析。 相似文献
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目的 采用单片机对X射线源进行控制,使其稳定地工作在要求的电压和电流下。方法 采用PID算法对X射线源进行控制。结果 该系统稳定可靠,精确度较高。结论 采用单片机对X射线控制,方法简单、价格便宜、易于实现,具有广阔的应用前景。 相似文献
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单片机是一种运用在电路中的芯片,这种芯片运用的是超大规模集成技术,将多种数据处理以及存储等装置集中在一块小小的芯片上,形成一个微型的计算机系统。在电机控制中,对电机进行启动程序、运转、加速、减速、停止运行的控制都离不开单片机的应用。本文基于单片机的特点,分析了单片机在电机控制中的软、硬件设计方向,旨在帮助提高电机控制的有效性。 相似文献
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hT89C51单片机的交通灯控制系统由hT89C51单片机、LED显示屏、交通灯显示等组成,在交通灯功能控制的情况下,需要系统具有通行时间的设置功能,可以有效控制倒计时和急车强行。通过我国科学技术的发展,AT89C51单片机已经成功应用到很多领域中,并通过系统的设计和完善,充分体现出了AT89C51单片机的优秀性能。本系统利用AT89C51单片机为控制芯片,对交通灯的控制采用仿真实验的方法进行检测,并对实验的结果进行分析,从而实现经济、智能、简单的设计要求。 相似文献
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AT89C51单片机的交通灯控制系统由AT89C51单片机、LED显示屏、交通灯显示等组成,在交通灯功能控制的情况下,需要系统具有通行时间的设置功能,可以有效控制倒计时和急车强行。通过我国科学技术的发展,AT89C51单片机已经成功应用到很多领域中,并通过系统的设计和完善,充分体现出了AT89C51单片机的优秀性能。本系统利用AT89C51单片机为控制芯片,对交通灯的控制采用仿真实验的方法进行检测,并对实验的结果进行分析,从而实现经济、智能、简单的设计要求。 相似文献
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CAN总线温度控制器是一个典型的检测、控制型应用系统,它要求系统完成从温度检测、信号处理、输入输出接口电路设计对温度进行控制。本文通过分析CAN总线温度控制器,温度传感器电路,A/D模数转换电路,D/A数模转换电路,并以8031单片机为核心,对整体电路进行设计。 相似文献
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介绍了单片机控制系统在以自动复叠为制冷系统的冷冻干燥系统的应用,冷冻干燥系统采用集冷阱和干燥室成为一个整体的台式机,而自动复叠制冷系统采用回热器作为缓冲容器,调节冷量的旁通阀采用电子膨胀阀;以干燥阶段的数学模型为基础,得到控制的函数关系式,作为控制的数学基础,控制系统是以单片机为核心进行硬件的配置和软件设计来处理经模数转换的变送器传出信号;在编写控制系统的软件时采用了模糊控制的思想,对输入的数据进行处理;系统采用的触摸屏集显示、输入为一体,作为人-机通话的窗口。 相似文献
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本文介绍用MCS-51单片机形成编程式CCD驱动器的方法,解决了驱动器的通用性问题。此单片机还可对CCD输出信号进行采集和处理,构成结构精巧的线度测量系统。 相似文献
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Chang SH Park SB Cho GH 《IEEE transactions on ultrasonics, ferroelectrics, and frequency control》1993,40(3):216-223
The quadrature sampling technique as a means of detecting the envelope of RF waveform in the baseband is well known. If this technique is applied to a focused ultrasound imaging system using an array transducer, whether it is a synthetic or nonsynthetic focusing system, unwanted phase terms appear in the expressions of the inphase and quadrature components of the baseband signal when an appropriate delay time is introduced to each channel signal for the purpose of focusing. The expressions of the inphase and quadrature components from the point of focusing are derived and analyzed in detail, and a scheme to eliminate the unwanted phase terms is proposed. The resulting phase-error-free quadrature sampling technique is applied to the synthetic focusing system; a system block diagram together with the simulation and experimental results are presented. 相似文献
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本文介绍的光纤压力传感器微机控制与数据处理系统是以8098单片机为核心,配上适量的外围电路所构成。该系统直接利用8098单片机芯片内的A/D模拟输入通道和脉宽调制(PWM)功能来进行数据采集和输出控制信号。该系统还方便地实现与微型打印机的联接,以便将采集的数据保存。整个系统结构简单,成本低,可靠性高,实时控制和测试功能较强,有良好的工业应用价值。 相似文献
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A self-focusing technique and its application to a linear array system are presented in this paper. By application of the technique the system is capable of both sonification and reception focusing. The array is first excited as an unfocused array. Next a cross-correlation technique is used to determine time delays of reception of the largest amplitude backscattered signals at the elements of the array. The original transducer signal is then reemitted with the appropriate time delays to achieve sonification focusing on the scatterer producing the largest signal. This process is repeated in an iterative mode to focus energy on the strongest scatterer. Once insonification focusing has been achieved the last time-delay calculations are used once more for reception focusing, i.e., to correct the signals received by the individual elements for differences in arrival times. A low cost linear array has been constructed to implement the self-focusing technique. Examples demonstrate the capability of the technique to focus on the largest hole of sets of three holes in an aluminum specimen. 相似文献
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Kareem A. Balakrishnan S.K. 《IEEE transactions on instrumentation and measurement》1988,37(4):519-524
The authors discuss the impact of digital signal processing on test instruments and describe the use of a single-chip digital signal processor called TriStar whose architecture has been tailored for the instrumentation environment. TriStar instructions and programming are described, and attention is given to typical applications of TriStar, including averaging, fast Fourier transform, and interpolations. The authors explain how the processor delivers high throughput for these applications 相似文献
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Song T.K. Greenleaf J.F. 《IEEE transactions on ultrasonics, ferroelectrics, and frequency control》1994,41(3):326-332
A dynamic focusing method which employs an analog FIFO (AFIFO) for signal sampling and storage is proposed. The delay control on the ultrasound pulse echo at each array element for focusing delay compensation is achieved by the nonuniform sampling process, as suggested previously in a full digital beamforming system called Pipelined Sampled-Delay Focusing (PSDF). In the new focusing method, an analog sampling device, AFIFO, is used to sample and store values of the pulse echo as it arrives from each imaging point at each array element. Due to the first-in first-out operation of each AFIFO, all the samples for each imaging point along the axis of the beam are arranged at the same output position required on each channel and will be output simultaneously by a uniform output clock. Except for the nonuniform sampling control, all processing in the new dynamic beamforming method is carried out exactly the same as in conventional analog imaging systems. The advantages of the new system are that the sampling rate and hardware complexity for dynamic focusing can be greatly reduced by employing nonuniform sampling and analog signal processing. The performance and validity of the new method are verified experimentally 相似文献