A General Multi-channel Data Acquisition System

Abstract

The invention discloses a general multi-channel data collection system. The general multi-channel data collection system comprises a collection card and a master control card. The collection card collects analog signals transmitted from a collection sensor, and the analog signals are collected and converted into digital signals. The master control card carries out denoising and filtering on data in the digital signals, so that real-time correction of the data is achieved, an upper computer is connected with the master control card, and configuration information is written from the master control card, so that control over the work of a whole system is achieved. An analog-digital conversion module of the collection card converts the analog signals into the digital signals, and a photoelectric isolation module of the collection card isolates the analog portion from the digital portion of the whole data collection system completely, so that the transmission of the analog signals is not interfered by noise of a digital circuit. The photoelectric isolation module is used for reducing the influence of the noise of the analog portion on the digital portion, a precision power module of the collection card reduces the influence of power supply noise, and a phase-locked loop of the collection card guarantees phase synchronization of clock signals among the collection cards.

Description

technical field

[0001] The invention belongs to the field of data acquisition, in particular to a general high-precision multi-channel data acquisition system. Background technique

[0002] With the rapid development of computer science and technology, digital technology is more and more widely used in scientific research, industrial production and various aspects of human daily life due to its convenience, flexibility, stability and reliability. As an essential part of digital technology, data acquisition technology has also been deeply researched and developed. People usually convert the analog signal sent by the sensor into a digital signal according to the sampling theorem, and then process these digital signals. Data acquisition can be said to be the core of digital signal processing, and the quality of data acquisition will directly affect future work. Data collection is widely used in various fields, and has penetrated into various fields such as industrial sites, g...

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