An ADC12500 multifunction fast recorder

A wideband two-channel waveform recorder module based on 12-bit analog-to-digital converters with a maximal sampling frequency of 500 MHz is described. The digital recorder unit is based on field programmable gate array (FPGA) elements, allowing one to change the functional area of its main assemblies with the aid of the program. The device is equipped with a buffer storage with a capacity of a 3M samples/channel and built-in Ethernet-10/100 communication channel, supporting procedures of the command and information exchange with the server and a procedure of the remote loading of a configuration file into the FPGA. The device is oriented at operation as part of multichannel measuring systems, ensuring the synchronous recording and preliminary processing of data in the real-time mode in neutron, spectroscopic, laser, and other diagnostics, used as part of the study in the field of plasma physics and controlled nuclear fusion. Examples of using the recorder in similar applications are given.     

A microspectrofluorometer with on line real time correction of spectra.

A microspectrofluorometer incorporating analogue computing segments and suitable for recording corrected spectra instantaneously on an X-Y recorder is described.     

Applications of digital image recorders in beam diagnostics systems

A digital luminescent screen glow recorder designed for using in plants of the Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, is described. General aspects of implementing the unit and possible versions and special features of designing these units on the basis of different elements are considered. The analysis of factors affecting the selection of types of the light-sensitive image recorder (elements, which directly determine optical characteristics of the recorder) is performed. The results of practical applications of this unit for measuring beam characteristics of the ЛИУ-2 induction accelerator designed at the Institute of Nuclear Physics are given.     

A simple method for obtaining and analysing the absorption spectra of microscopic specimens

A method is described for obtaining and analysing the absorption spectra of microscopic specimens, using readily available laboratory equipment. Spectra obtained from the primary image with a hand spectroscope are recorded photographically and the negative images subsequently analysed, in terms of optical density relative to a standard spectrum, using a gel scanner densitometer and chart recorder. The system has been used to recognize and characterize the haemoglobin of a symbiotic flatworm, absorption peaks being resolved to within 5.0 nm. Separation of the recording and analytical stages confers flexibility since records can be made, if desired, in the field or by co-workers elsewhere and analysed later in the base laboratory.     

A Modular Recording Titrimeter for Use with Luminescent Endpoint Detection

ABSTRACT

A recording titrimeter for use with luminescent endpoint detection is described. The titrimeter consists of a low-cost photomultiplier tube, regulated high voltage supply, electrometer, chart recorder, and peristaltic pump. A reaction cell based upon a 10 mm pathlength spectrophotometer cuvet and suitable for luminescence detection at high ambient light level is also described. The precision attainable with the titration system was determined with an acid-base titration using a modified reaction cell suitable for photometric titrations. A procedure suitable for determining Ca⁺² in the presence of at least five-fold Mg⁺² at the nanomole level is described, using the luminol-hydrogen peroxide reaction as the endpoint indicator. Ions which form stable complexes with the EGTA reagent and materials which significantly react with the Cu(II) back-titrant interfere with the determination.     

大容量固态记录器技术

数据记录器是数据处理系统和图像记录系统中的重要组成部分,固态记录器是最新型的大容量数据记录技术.综述了固态记录器的发展与应用情况,分析了固态记录器的固有特性以及大容量固态记录技术的发展方向,提出了研制大容量固态记录器所需解决的关键技术.     

跨平台操作系统数据记录模块技术研究

为了提高航空发动机实时记录数据的可靠性,提出了一款跨平台操作系统数据记录模块。该模块以Zynq7010芯片为核心,基于可移植操作系统接口标准,设计了统一的应用程序接口(API),兼容Linux和VxWorks 7.0操作系统。通过调用Linux的EXT4文件系统和VxWorks的TrueFFS文件系统驱动,结合用户数据报协议的网络通信方式,完成跨平台数据记录模块的存储操作。测试结果表明,该模块能以较快的速率实现两种操作系统下的数据记录过程,保障了航空发动机数据记录的准确性和可靠性。     

基于ARM的汽车行驶记录仪的研究

本文介绍了一种以32位微处理器S3C2410为核心及以Linux操作系统的新型汽车行驶记录仪,给出了该记录仪的主要功能,最后介绍了硬件结构及软件结构。实验表明该记录仪符合国家标准。     

Use of parallel channels in wideband signal recorders

A wideband signal recorder in which four parallel analog-digital channels are used for increasing the sampling frequency is described. The recorder consists of four analog subchannels, a synchronization unit, four analog-to-digital converters, a controller for a programmable logic array, and a USB interface. The following characteristics are attained: the frequency band is 200 MHz, the maximum sampling frequency is 1 GHz, the memory is 16 kbyte, the input-signal range is ±(0.5, 1, and 2) V, and the input is matched (50 Ω). Physically, the recorder is the external (to the USB bus) device of a computer.     

基于ARM 的汽车行驶状态记录仪设计

介绍了一种以ARM处理器为核，心，Linux为操作系统的汽车行驶状态记录仪，给出了该记录仪具备的基本功能，最后分析了系统的软硬件设计。     

An Electronic Peak Selector for Mass Spectrometric Data Acquisition

ABSTRACT

An electronic device for selection of 10 mass peaks from a quadrupole-mass spectrometer and for recording them on a single-pen recorder Is described.     

一种带指针指示的数字式显示记录仪

介绍一种集模拟显示仪表和数字显示记录仪表优点的新型带指针指示的数字式显示记录仪。它既能够精确测量、显示、记录被测量的大小，又可以直观的反映出被测量的变化趋势。该显示记录仪主体为一个由数字控制器与交流伺服电机构成的闭环系统。描述了该系统的双单片机结构，并重点分析了闭环回路的组成及系统特性；给出了系统中采用的电机驱动电路及用光电码盘进行位置反馈的方法；介绍了命名系统具有良好静动态特性的积分逼近型控制算法。     

微型变频实时采集记录仪

为了满足实时采集并存储大量动态参数的要求,介绍了基于MSP430单片机和闪存的数据采集系统在微型变频实时采集记录仪中的设计方法和解决方案。设计实现的微型变频实时采集记录仪具有微体积、低噪声、低功耗、抗干扰、智能记录及大容量存储的特点,有效地解决了动态参数测试中测试空间狭小,需要长时间实时记录数据的难题。     

Measuring the Amplitude Characteristic of an Image Recorder Based on a CCD Matrix

A method for studying the amplitude characteristic of an image recorder designed on the basis of a charge-coupled device (CCD) matrix is described. The recorder input signal is an intensity of distribution a monochromatic light formed upon Fraunhofer diffraction of the light by two identical slits. The developed optical system and the method used to process the digitized signal wake it possible to measure the recorder amplitude characteristic over the entire surface of the CCD matrix, as well as set an acceptable level of the mean intensity of the recorded optical radiation.     

一种实用的电源监测仪设计

针对工频电源稳定性对用电设备的影响,设计一种能实时记录工频电源电压和电流的仪器,提供和时间同步的记录信息,记录设定时间段的电压和电流数据,使数据可通过常用存储设备读出,由终端软件绘制出电压变化曲线,为用电设备故障分析以及事故处理提供依据.     

数字式多通道语音通信记录的一种新方法

传统的多通道通信记录设备是由模拟磁带机或数字磁带机构成，设备庞大复杂，价格高昂。随着语音压缩技术迅猛发展，码激励线性预测语音编码（CELP）、多带激励语音编码（MBE），都能在低比特率下，获得和市内电话长途电话大致相同的话音质量。因此，以PC机和海量存储器（硬盘）为核心，以软件为主体的全数字式多通道语音通信记录设备应运而生。叙述了方案的构成，实现该方案的关键技术和开发的实验样机的初步结果。     

基于嵌入式系统的电力故障录波器

介绍了一种基于嵌入式系统的电力故障录波器的设计方案.系统采用模块化设计,包括数据采集单元和人机接口单元,采用双微处理器协同工作方式.数据采集单元采用了硬件同步采样,对数据采集精度有一定的提高;DSP芯片TMS320F2812和A/D芯片ADS8364保证了故障录波的高速、高效和高可靠性.人机接口部分包括S3C44B0X芯片、以太网接口、LCD接口、USB接口等,并以以太网接口为例进行了详细的介绍.该系统解决方案对交流电参量检测装置的设计具有一定的参考价值.     

Measuring the flight of an arrow using the Acoustic Doppler Shift

Measuring the velocity of an arrow in flight is a task of interest to archers, but can be difficult without specialized equipment. We show how accurate velocity measurements can be made by recording the sound made by the arrow as it travels over one or more microphones. Useful recordings can be made with a data acquisition system or with the sound recorder built into most PC operating systems. Estimates of the drag coefficient of different arrows can be made using several microphones to record each shot.     

Modular design of a long-term portable recorder for physiological signals

A portable biomedical signal recorder is valuable for the detection of acute symptoms. By the use of an ambulatory recorder, investigators and clinicians have more opportunity to analyze paroxysmal or sudden symptoms from the long-duration recorded signals. We propose a modular recorder that contains a motherboard, modules, and an isolated RS-232 interface. The modules have been modified to measure electrogastrogram (EGG), electrocardiogram (ECG), and electroencephalogram (EEG) signals. The compact motherboard includes a microcontroller with a built-in A/D converter, secure digital (SD) memory card, and the driven-right-leg (DRL) circuit. The power consumption of the proposed recorder is less than 2 mA (6 mW). It can continuously record a lead-II ECG signal with a 10-bit resolution for 3.9 days. As a result, the design is suitable for the purpose of long-term portable recording.     

Streak camera-TV system with improved S/N ratio incorporating a digital video recorder directly interfaced to a computer

By incorporating a digital video recorder, a streak camera system previously developed for recording time-resolved transient absorption and emission spectra was greatly improved with respect to reproducibility and accuracy. The requirements for on-line computer time were also reduced.