数字仪器

In order to measure the passive network's conduction automatically, a network conduction instrumentation based on FPGA technology was designed and implemented according to the design principle of Virtual Instrument. System adopted FPGA technology building a digital flat-top to imitatively produce the high quality sine signal. Under the control of C8051MCU, measurement, calculation and display of the port network's conduction were automatic implementation. Furthermore, the system has the function of frequency step measurement.

摘 要：为了实现对无源端口网络的导纳进行自动测量，根据虚拟仪器设计思想，设计实现了基于FPGA的网络导纳测量仪，系统以FPGA作为数字平台模拟产生优质的正弦信号，在单片机C8051的控制和处理下，自动实现端口网络导纳值的测量、计算、显示，同时具有频率步进测量功能。

As an ammeter, the electrometer is capable of measuring extremely low currents, limited only by theoretical limits or by the instrument's input offset current. It also has a much lower voltage burden than conventional DMMs.

做为安培计，静电计能够测量仅由理论极限值或仪器的输入偏置电流所限制的微弱电流，而且其输入端压降比普通的数字多用表要低的多。

As with the accuracy specification, this value is given as a percentage of reading plus a number of counts of the least significant digit (or as a ppm of reading plus ppm of range) for digital instruments.

和准确度技术指标一样，对数字显示仪器来说，温度系数表达为读数的百分数加上最低有效位的字数（或者读数的ppm+量程的ppm）。

He is the current technique-assistance expert in Innovation and Practice Base for Graduates in the Graduate Institute of Chongqing University, director of Chongqing University-American Texas Instrument Digital Signal Processing Lab and Chongqing University-American Micro-chip Company PIC Chip Micro-computer Lab.

现为重庆大学研究生院研究生创新实践基地技术支持专家，重庆大学-美国德州仪器数字信号处理方案实验室和重庆大学-美国微芯公司PIC单片机实验室的实验室主任。

It had been connected to a digital multimeter successfully, and can be used to connect any instrument equipped IEEE-488 interface.

该接口实现了与数字万用表的连接，可以与任何具有IEEE488接口的仪器相连接。

Norma mode lets you set run condition using the numerical keyboard and parameter entry keys: ROTOR, SPEED, TIME, TEMP, ACCEL/DECEL, Or you can recall a program you've previously stored in memory. Then press START the instrument is auto-program controlled.

您设定好运转参数，按相关参数键、数字键，如转子号、转速、时间、温度、加/减速速率，或直接调用已存储的程序号，按启动键后仪器自动进入程序控制。

At any time during you can tell at a glance exactly what your GL-25LM is doing, rotor speed, centrifuge force, temperature, remaining run time, number of program, accel/decal rates are continuously displayed on the digital display paned. And you can check your set run conditions, That can be shown on the liquid crystal display.

任何时候您从数字显示板上能准确地了解仪器运行当前的转速、离心力、温度、剩余时间、程序号和加/减速速率，同时在液晶显示器上您能查看预选的运行参数。

It also needs to save, analyze and redisplay these signals. But traditional measuring instruments can't satisfy these requirements already. Digital oscilloscopes have little storage, few channels and weak analytical ability.

然而，采用传统的测量仪器已经不能满足要求，如果采用数字存贮示波器记录数据，也存在着存储深度不够、采样路数太少和分析处理功能较弱等问题。

Main business: Sales Main Products: Temperature instrumentation, pressure instrumentation, flow meters, material / liquid level instruments, metering equipment, control systems thermocouples, thermal resistors, wire compensation, pressure gauge, transmitter, pressure transmitter, Smart Transmitter, Level Transmitter, Flow Meter, Orifice flowmeters, electromagnetic flowmeter, vortex flowmeter, Verabar, metal tube rotameter, gas flowmeter, no NG Paperless Recorder, indicating regulator, regulator, hand fuck, and Flow Totalizer, level transmitter, pressure calibrator, process calibrator, digital pressure gauge, check simulation device, auto-calibration system.

主要业务∶销售主营产品：温度仪表，压力仪表，流量仪表，物/液位仪表，计量仪器，控制系统热电偶，热电阻，补偿导线，压力表，变送器，压力变送器，智能变送器，液位变送器，流量计，孔板流量计，电磁流量计，涡街流量计，威力巴流量计，金属管浮子流量计，气体流量计，无仪纸记录仪，显示调节仪，调节器，手操器，流量积算仪，液位变送器，压力校验仪，过程校验仪，数字压力计，校验仿真仪，自动校验系统。

Special appreciations are presented to Dalsa, Sick China, LUSTER Light Tech Co. Ltd, Oriental Technology Ltd, JAI, Pepperl+Fuchs, OPT Automation, Toshiba Teli Corporation, ADLINK Technology Co.,Ltd, Princeton Instruments, TVI VISION, CCS INC, e2v and STEMMER IMAGING.

加拿大DALSA公司、德国施克传感器、北京凌云光视数字图像技术有限公司、东冠科技有限公司、JAI公司、上海倍加福工业自动化贸易有限公司、东莞市奥普特自动化科技有限公司、东芝泰力株式会社、凌华科技有限公司、普林斯顿仪器、瑞士TVI VISION公司、CCS株式会社、e2v公司和STEMMER IMAGING分别对各自的机器视觉技术、产品和系统作了详尽的介绍。

At the rear was an innovative combination transaxle with the gearbox, clutch, differential, and inboard-mounted drum brakes.

在后面是与变速箱，离合器，差的创新结合变速，和内侧安装鼓式制动器。

For more people can apprecaite and have the master work, there is reproduction painting appears in the market, the large various selection of paint,the high saturation of color plus the plentiful sfumato, to make the reproduction perfect copy and detail as original painting, so as to meet the requirment of amateurs who love art paintings,they do not need to pay high price to get classical paintings.

颜料色域广，色彩饱和度高，色彩层次丰富，图像色彩还原真实，能完美的复制原作，满足艺术爱好者欣赏，艺术爱好者们不用支付昂贵的价格就能拥有经典油画。