Multi-channel-isolated data acquisition system

Abstract

The invention belongs to the data acquisition technological field and discloses a multi-channel-isolated data acquisition system. The system comprises a signal conditioning circuit, an analog-to-digital conversion circuit, a power source circuit and a bus interface circuit; acquired signals are inputted through the bus interface circuit, and sequentially enter the signal conditioning circuit and the analog-to-digital conversion circuit so as to be processed by the signal conditioning circuit and the analog-to-digital conversion circuit; output signals are outputted through the bus interface circuit; the signal conditioning circuit is used for attenuating, isolating, and strobing the acquired signals under the control of channel selection signals; the analog-to-digital conversion circuit isused for performing analog signal-to-digital signal conversion on signals outputted by the signal conditioning circuit; the bus interface circuit is used for implementing the input and output of theacquired signals; and the power source circuit is used for providing required voltage signals for the signal conditioning circuit and the analog-to-digital conversion circuit. According to the multi-channel-isolated data acquisition system of the invention, the signals of various channels can be isolated from each other by means of strobing isolation and signal input and output isolation, and therefore, mutual interference between the channels and the interference of a host computer circuit connected with the channels can be eliminated.

Description

technical field [0001] The invention belongs to the technical field of data acquisition, and more specifically relates to a multi-channel isolated data acquisition system. Background technique [0002] As a bridge between analog signals and digital signals, analog data acquisition modules play a very important role in electronic systems, and are also in great demand in the field of defense industry, such as electronic countermeasure equipment, military communication equipment, etc. With the continuous improvement of data acquisition technology, the update cycle of acquisition equipment is getting shorter and shorter. High integration, large storage capacity, high real-time performance and fast speed have become the general characteristics of data acquisition modules. Most of the existing industrial-grade data acquisition modules, the signals are not isolated. In a certain type of test system, it is necessary to collect analog quantities such as system voltage. Due to the har...

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a multi-channel isolated data acquisition system, the purpose of which is to solve the problem of signal and noise crosstalk caused by non-isolation between acquisition channels in the existing multi-channel acquisition system technical problem

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