Data acquisition system has which kinds of acquisition methods, what are the characteristics of each

1, device type:

This refers to the process of automatically collecting information from analog and digital units to be measured, such as sensors and other devices to be measured. Data acquisition system is a combination of computer-based measurement hardware and software products to achieve flexible, user-defined measurement system. For example, bar code machines, scanners, etc. are data acquisition tools (systems).

2, network class:

Used to batch capture the content of web pages, forums, etc., directly saved to the database or published to the network of an information technology tool. It can automatically collect the original web pages according to the rules set by the user, obtain the contents needed in the format web pages, and also process the data.

The data collection system includes the following functional modules: visualization of report definition, definition of audit relationship, approval and release of reports, data filling, data pre-processing, data review, comprehensive query statistics and so on.

Through networked and digitized information collection, it expands the coverage of data collection and improves the comprehensiveness, timeliness and accuracy of auditing work; and ultimately realizes the modernization of the management of related business work, standardization of procedures, scientific decision-making, and networking of services.

Expanded Information

Data Acquisition System Characteristics:

a. Strong data acquisition versatility. Not only can collect electrical quantities, can also collect non-electrical quantities. Electrical parameter acquisition with AC discrete sampling, non-electrical parameter acquisition using relay patrol, signal processing by the high-precision isolated operational amplifier AD202JY conditioning, good linearity and high precision.

b, the whole system adopts distributed structure, software and hardware are modular design. The data acquisition part adopts self-developed RS-485 network with optical isolation, which has high communication efficiency, good security and simple structure.

The background system can be composed of 485 network, Novell network and WindowsNT network and other distributed networks according to the size and requirements of the actual monitored system. As the software and hardware are distributed and modularized, it is easy to upgrade and maintain the system, and form different systems as needed.

c, data processing on the WindowsNT platform using Visual C + + + language programming, processing capacity, speed, friendly interface, can realize the network data **** enjoy.

d, the whole system is self-developed, in line with China's national conditions. Changes to the original system of the power plant is very small, the system cost is low, more suitable for small and medium-sized power plant technology transformation needs.

Baidu Encyclopedia-Data Acquisition System