Data acquisition system of the OKA experiment

A data acquisition system of the OKA experiment on studying rare kaon decays on the U-70 accelerator is described. The basis of the blocked data acquisition system was the high-speed multichannel information system MISS with autonomous controllers that read out the front-end electronics in the sequential data reading mode and buffering data during the accelerator burst. Data stored in the buffer memory are read out and processed at the end of the accelerator burst. The DATE package builds subevents from event fragments and events from subevents via the event building network. The event building network with the star topology is made with 1GbE-interfaces and 24 × 1 Gb E-switch. The GlusterFS cluster file system underlies the distributed storage system.     

Scaling Modules for the IHEP Experimental Setups

Multichannel scaling modules, which have a high response speed and meet the specific requirements of experiments conducted with the IHEP physical setups, are described. The scaling modules are made to SUMMA, MISS, and Euromechanics standards and use high-speed microcircuits of the 1500 family and programmable logic integrated circuits from Altera.     

High-speed multichannel modules of time-to-digital converters with a picosecond time resolution for IHEP experimental setups

High-speed 64- and 128-channel modules of time-to-digital converters with a picosecond time resolution and programmable parameters are described. The modules are based on HPTDC1.3 integrated circuits and Altera FPGAs in the framework of the IHEP-standardized high-speed multichannel information system (MISS) and a new EuroMISS electronics system.     

A data acquisition and control system in the MISS electronics standard for the detector on drift tubes

A structure of the data acquisition and control system (DAQC) in the MISS electronics standard for a multichannel detector on drift tubes is described. Its special feature is the use of the specialized LE-83 controller for communications with the computer and LE-83T controller-timer, which fulfills off-line all functions of storing data in its inner memory buffers in real time without an obligatory external trigger launching signal. The rewriting of stored data from the buffer into the computer memory and their transmission via the local network occur periodically in program-specified time intervals. The received data are processed on-line to control the equipment, alert, if a fault is detected, and produce physical results directly to the operator, who interacts with the system through the graphic interface with a possibility of the setup configuration. The system is built as a set of interacting processes, which can operate both on one computer or be distributed on several computers (within the frameworks of the local network).     

SAR光学处理器中的电子控制与显示系统

本文讨论SAR光学处理器电子控制与显示系统.这套系统中含有将张力误差控制在±10g以内的胶片张力控制,它是带有AGC的位置控制系统.确保数据输片机和图像输片机跟踪精度优于0.5%的胶片速度控制,它是由一台精密脉冲信号发生器控制的两套具有复合控制功能的锁相速度控制系统.线阵CCD成像器件与图像存贮器的有效组合,使SAR光学处理器具有快速图像显示能力.采用声光调制器(AOM)的光强稳定系统,可将激光器输出强度稳定在±2%以内.还有位置伺服式电动调焦以及附加信息的译码显示与记录等.     

A data acquisition system of the “Hyperon-M” experiment on basis of the MISS electronics and controller with internal hardware buffering

The structure of the fast data acquisition system collecting data from multichannel particle detectors for experiments on an accelerator, which is based on MISS electronics, is described. A special feature of the architecture used is the ЛЭ-74 specialized controller that independently reads data from the detectors into the internal memory buffer on a real-time scale in the course of the beam spilling into the target. The stored information is rewritten from the internal buffer on the hard disk of the computer. The data are further transmitted via the local network in intervals between spills. This scheme allows one to avoid accessing slow peripherals in the course of the beam spill and, thus, to attain a speed that is only limited by the response speed of the used circuitry components. In tests conducted as part of the Hyperon-M experiment on the U-70 accelerator, an experimental data collection speed of up to 9 Mbyte/s was attained, which is comparable with the data transmission speed in existing local communication networks.     

Structure and software of the data acquisition network node in the SPASCHARM experiment

An intelligent crate controller controlled by the built-in ARM system has been developed for the new EuroMISS front-end electronics of the SPASCHARM experiment at the Institute for High Energy Physics (IHEP). The first version has a 250-Mbyte buffer memory and is capable of transmitting data to the network with a rate up to 70 Mbit/s. Building a computer into each crate with electronics has made it possible to produce distributed data acquisition and slow control systems of the setup. Principles of interaction of the crate controller, front-end electronics, and network data acquisition system are stated.     

New chatter-free sliding mode synchronization of steer-by-wire systems under chaotic conditions

Vehicle safety issues and its systems dependence on electronics are rapidly increasing. In intelligent vehicles, rigid components are replaced with controlled x-by-wire systems including configurable electronic elements. In the paper, through complete modeling of Steer-by-wire (SBW) nonlinear dynamics, the chaotic motion of the system is elucidated by a new yaw stability control method. The designed chatter free Sliding mode controller (SMC) is used to synchronize chaotic motion of the SBW system. Following stability and robustness analysis, computer simulations show that the proposed control system is quite significant for nonlinear systems like the SBW system. Besides, the robustness of the SMC against exogenous disturbance protects vehicle from undesired slide and spin motions.

     

Microprocessor-based pulse rate monitor

Modern biomedical instrumentation uses the technology that resulted from advances in electronics. Integrated circuit (IC) chips have replaced large systems of hard-wired electronic logic circuits and made them obsolete. Probably the most significant development in electronics is the IC chip called a microprocessor. Its capabilities make possible sophisticated instruments that can measure, compute, and display data for recurring physiological changes such as pulse rate. Because such instruments can function faster than the changes occur, information about the rate can be determined quickly, and remedial or corrective action can be implemented quickly in response to the data. This paper describes a pulse rate monitor that uses a microprocessor. It measures the occurrence rate of signals such as heart rate and respiration rate. It detects the signal rate, compares it with preset limits, and activates alarms as the limits are exceeded. The rate is measured and displayed at all times, until alarm conditions are detected. Then the display indicates the rate that caused the alarm condition. Upper and lower rate limits can be adjusted by the operator to suit the application.     

探究计算机控制技术在汽车电子系统中的应用

在当前社会当中,汽车正在经历智能化的发展。计算机技术和电子产业的兴起为汽车电子控制系统提供了技术上的保障,同时也进一步拓宽了汽车的发展领域。计算机控制技术具有精准、高效的特点,可以使汽车电子系统变得更为智能化,在其中更好地体现人性化的关怀,在确保安全和稳定的基础上增强舒适性与节能性。无论是在安全控制系统还是在电子监控系统当中,计算机控制技术都可以发挥作用,它使汽车成为了一个多功能的设备,能紧密地与世界联系在一起。     

复杂电子装备制造数据建模与集成应用研究

目前,对复杂电子装备制造过程中多层级、多节点、信息庞杂的制造物料清单(Manufacturing Bill of Material,MBOM)和实装物料清单(Built Bill of Material,BBOM)的数据建模及其在系统集成中的应用尚无深入研究.文中深入研究了复杂电子装备的MBOM、BBOM模型及映射过程...     

持续扩展的汽车电子系统

本文介绍了国外汽车电子系统的部分最新技术成果,重点是汽车电子网络技术和网络系统的特点及其应用。还介绍了提高汽车操纵性、安全性的线传控制(X-by-wire)技术。最后简要介绍了汽车电源管理系统的发展趋势和新的解决方案。     

Programmable robotized 'transfer-and-jet' printing for large, 3D curved electronics on complex surfaces

Large, 3D curved electronics are a trend of the microelectronic industry due to their unique ability to conformally coexist with complex surfaces while retaining the electronic functions of 2D planar integrated circuit technologies. However, these curved electronics present great challenges to the fabrication processes. Here, we propose a reconfigurable, mask-free, conformal fabrication strategy with a robot-like system, called robotized'transfer-and-jet' printing, to assemble diverse electronic devices on complex surfaces. This novel method is a ground-breaking advance with the unique capability to integrate rigid chips, flexible electronics, and conformal circuits on complex surfaces. Critically, each process, including transfer printing, inkjet printing, and plasma treating, are mask-free, digitalized, and programmable. The robotization techniques, including measurement, surface reconstruction and localization, and path programming, break through the fundamental constraints of 2D planar microfabrication in the context of geometric shape and size. The transfer printing begins with the laser lift-off of rigid chips or flexible electronics from donor substrates, which are then transferred onto a curved surface via a dexterous robotic palm. Then the robotic electrohydrodynamic printing directly writes submicrometer structures on the curved surface. Their permutation and combination allow versatile conformal microfabrication. Finally, robotized hybrid printing is utilized to successfully fabricate a conformal heater and antenna on a spherical surface and a flexible smart sensing skin on a winged model, where the curved circuit, flexible capacitive and piezoelectric sensor arrays, and rigid digital–analog conversion chips are assembled. Robotized hybrid printing is an innovative printing technology, enabling additive, noncontact and digital microfabrication for 3D curved electronics.     

基于神经模糊技术的电液伺服控制

研究了基于神经模糊混合技术的电液伺服系统控制问题。综合神经网络与模糊逻辑技术的优势,构造了一种神经模糊控制器,它具备知识自动获取、并行分布存储及快速模糊推理决策的能力,给出了一种在线学习算法。用于一类典型的电液伺服系统的控制,获得了满意的效果。神经模糊混合技术对于电液伺服控制的发展与要求（如更复杂系统及其高性能控制）具有重要价值。     

Vision placement [vision systems]

The growing trend for miniaturisation has challenged the abilities of electronics manufacturers to accurately place sensitive, high-performance components without damage. Somewhat surprisingly it is conventional vision systems technology that has emerged as the answer to these anxieties. With the trend for products that are 'small and beautiful' gathering pace, the problem of accurately positioning increasingly high performance components is one that urgently needs to be resolved. Sophisticated components with relatively low yields, such as those used by the micro electromechanical systems (MEMS) and electronic fabrication industries, are just too expensive to manufacture to lose to poor assembly. Manufacturing industry has developed high performance vision systems to ensure right-first-time placement of traditional expensive components such as those made from composite metals or machined on multi-axis machinery.     

A multi-agent RFID-enabled distributed control system for a flexible manufacturing shop

Flexible manufacturing systems are complex, stochastic environments requiring the development of innovative, intelligent control architectures that support flexibility, agility, and reconfigurability. Distributed manufacturing control system addresses this challenge by introducing an adaptive production control approach supported by the presence of autonomous control units that are cooperating with each other. Most of the currently distributed control systems still suffer from lack of flexibility and agility when the product verity is high and is not reconfigured in case of ad hoc events. To overcome this limitation, a drawback of an excessive dependence on up-to-date information about the products and other elements that move within the system is essential. Radio frequency identification (RFID) is a new emerging technology which uses radio frequency waves to transfer data between a reader and movable item for identification, tracking, and categorization purpose. This paper discusses the architecture devised to deploy RFID-enabled distributed control and monitoring system by means of a set of agents that are responsible for the realization of different control and monitoring tasks and for cooperating to enhance agility, flexibility, and reconfigurability of manufacturing system.     

一种视频流数据的处理与自动负载方法

近年来,大数据技术的发展使得实时视频流处理成为可能.实时视频流数据属于典型的大数据,从这些非结构化的数据中提取有价值的信息非常困难,因此需要利用大数据与视频流处理技术,通过实时处理模组从中提取有用的信息.由于视频流的大数据特性,传统的数据存储方法成本较高,需要配合云存储技术来实现视频流的高效处理与运算.云存储服务提供了...