数据采集系统(中英)

技术的发展，

这一过程在电子设备的帮助下得到了简化，

而且更加精确、可靠，用途也更加广泛。

这些设备从 简

单的记录器到复杂的计算机系统，

范围广泛。

数据采集

产品是系统的核心，它将温度、流量、液位 或压力传感

器等各种产品联系在一起。

下面是一些常用的数据采集

术语：

Data acquisition systems, as the name implies, are products and/or processes used

to collect information to document or analyze some phenomenon. In the simplest

form, a technician logging the temperature of an oven on a piece of paper is

performing data acquisition. As technology has progressed, this type of process has

been simplified and made more accurate, versatile, and reliable through electronic

equipment. Equipment ranges from simple recorders to sophisticated computer

systems. Data acquisition products serve as a focal point in a system, tying together

a wide variety of products, such as sensors that indicate temperature, flow, level, or

pressure. Some common data acquistion terms are shown below:

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模数转换器

(ADC)

用于将模拟信号转换为等价数字信号的电子设备。

统的核心。

数模转换器

(D/A)

在许多数据采集设备中用于产生模拟输出信号的电子元件。

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数字量输入

/

输出

(DIO)

指一种类型的数据采集信号。

数字量

I/O

是包含两种状态的离散信号。

这两种 状

态可以是开

/

关、高

/

低、

1/0

等。数字量

I/O

又称为二进制

I/O

。

差分输入

指信号连接到数据采集设备的一种方式。

对于每个通道，

差分输入都有一个唯一的

高信号连接和一个 唯一的低信号连接。

数据采集设备分单端输入和差分输入两种 类

型，许多设备同时支持这两种配置。

通用接口总线

(GPIB)

与

HPIB

（惠普）同义，是通过计算机控制电子仪器时所使用的标准总线。

在

ANSI/IEEE

标准中又称

IEEE 488

。

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Analog-to- digital converter (ADC)

An electronic device that converts analog signals to an equivalent digital

form. The analog-to-digital converter is the heart of most data acquisition

systems.

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Digital-to-Analog Converter (D/A)

An electronic component found in many data acquistion devices that produce

an analog output signal.

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Digital Input/Output (DIO)

Refers to a type of data acquistion signal. Digital I/O are discrete signals

which are either one of two states. These states may be on/off, high/low, 1/0,

etc. Digital I/O are also referred to as binary I/O.

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Differential Input

Refers to the way a signal is wired to a data acquisition device. Differential

inputs have a unique high and unique low connection for each channel. Data

acquisition devices have either single- ended or differential inputs, many

devices support both configurations.

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General Purpose Interface Bus (GPIB)

Synonymous with HPIB (for Hewlett-Packard), the standard bus used for

controlling electronic instruments with a computer. Also called IEEE 488 in

reference to defining ANSI/IEEE standards.

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分辨率

数据采集系统可检测到的最小信号增量。

分辨率可以按位、

比例或满量程百分比来

表示。