计算机控制系统与所控制的生产过程密切相关，根据生产过程的复杂程度和工艺要求的不同，

系统设计者可采用不同的控制方案。现从控制目的、系统构成的角度介绍几种不同类型的计算

机控制系统。

 2.1.2.1

数据采集系统(DAS)

数据采集系统(Data Acquisition System，DAS)是计算机应用于生产

过程控制最早、也是最基本的一种类型，计算机控制系统与所控制的生产过程密切相关，根据生产过程的复杂程度和工艺要求的不同，系统设计者可采用不同的控制方案。现从控制目的、系统构成的角度介绍几种不同类型的计算机控制系统。

 2.1.2.1

数据采集系统(DAS)

数据采集系统(Data Acquisition System，DAS)是计算机应用于生产过程控制最早、也是最基本的一种类型，直接数字控制(Direct Digital Control，DDC)系统是用一台计算机不仅完成对多个被控参数的数据采集，而且能按一定的控制规律进行实时决策，并通过过程输出通道发出控制信号，现对生产过程的闭环控制，所示。为了操作方便，DDC系统还配置一个包括给定、显示、报警等功能的操作控制台。

 

AGILENT G1361-60000 EMPV ELECTRO MAGNETIC PROPORTIONAL

JOKAB SAFETY NORTH AMERICA FR4-35-1500 LIGHT CURTAIN RE

IEC CENTRA-7R REFRIGERATED CENTRIFUGE

FISHER SCIENTIFIC 15-460-S15 ISOTEMP 115 5L/10L DUAL CH

CHEMGLASS MK-0508-052MS 19 LITER JACKETED BOTTLE

SORVALL INSTRUMENTS SS-34 CENTRIFUGE ROTOR

FRANKLIN ELETRIC/ALCATEL VACUUM PUMP

LEITZ VARIO ORTHOMAT CAMERA MICROPHOTOGRAPH?Y SYSTEM

HYPERVAC 100 / MARATHON MOTOR 5VJ56C17F516A P

YASKAWA SGMG-13A2AB AC SERVO MOTOR & UTOPH-81AWF ENC.

Ultrasonic Processor Vibra Cell, Model VC130PB 130W, 12

WORTHINGTON 4X3X6" 175 PSIG PUMP

MILLIPORE STERITEST COMPACT

DANFOSS MANEUROP MTZ144HV4VE REPLACEMENT HERMETIC COMPR

FISHER SCIENTIFIC ISOTEMP UC25CWFMS 24.5 CU-FT LAB FREE

WORCESTER WESTLOCK ACCUTRAK 2" THROTTLE CONTROL VALVE

BECKMAN 41000 RPM CLASS CDFG 6 POSITION CENTRIFUGE ROTO

BECKMAN COULTER GH-3.7 3750 RPM 4 PLACE SWING BUCKET CE

BECKMAN NVT 65.2 65,000 RPM NEAR VERTICAL TITANIUM CENT

PRECISION VAC.PUMP DDC310/FRANKLIN ELEC. 3/4 HP MOTOR

KOMPSPIN KA-1850 18,000 RPM CENTRIFUGE ROTOR

IEC 8947 4 PLACE 250ML SWINGING BUCKET CENTRIFUGE ROTOR

JOKAB SAFETY NORTH AMERICA FT4-35-1500 LIGHT CURTAIN TR

THK KR4610BE+440L LINEAR MOTION GUIDE ACTUATOR

Hermle Z 233 MK-2 Labnet Refrigerated Microcentrifuge?.

SORVALL SH-MT 20000 RPM MAX SUPERSPEED CENTRIFUGE ROTOR

DU PONT INSTRUMENT SORVALL GSA 13000 REV/MIN MAX CENTRI

1 1/2" YARWAY SOCKET WELD VALVE P/N 6981

DEZURIK 10" KNIFE GATE VALVE 9004807 FIG 829 STEEL 316

MILLIPORE AMICON CAT. NO. 5111 M2000 2 LITER HIGH OUTPU

PRECISION SCIENTIFIC VACUUM PUMP MODEL 10985

STAUBLI SP1 D 211-399-02 ROBOTIC CONTROL TEACH PENDANT

LEROY SOMER CENTRIFUGAL PUMP 1730 R.P.M., 3 PHASE, 3 H.

NATIONAL LABNET CO. 311D INCUBATOR

FISHER SCIENTIFIC ISOTEMP #425F FREEZER

RELIANCE M3-5 ELECTRIC 2360 RPM INVERTER MOTOR

BALDOR MINTDRIVE II MDH2A02TB-RB23 AC MOTOR DRIVE

JOKAB SAFETY NORTH AMERICA FR4-35-1500 LIGHT CURTAIN RE

VALLEY CRAFT#A48320 0100 PORTABLE HYDRAULIC BARREL DRUM

TOLAN PRESSURE VESSEL

MED ASSOCIATES DILUTION OLFACTOMETER PHM 275

STERLING ELECTRIC MOTOR & ALFALAVAL CENTRIFUGAL PUMP

EPPENDORF CELLTRAM OIL 5176 MANUAL HYDRAULIC MICRO INJE

PHARMACIA BIOTECH PC 3.2/10 17-0774-01 LIQUID CHROMATOG

GASTECH MOD# 3890T CFC DETECTOR & TRANSMITTER **