AC-DC voltage acquisition circuit of data acquisition recorder

Abstract

The invention discloses an AC-DC voltage acquisition circuit of a data acquisition recorder, and belongs to the technical field of a circuit structure of electronic hardware equipment. The AC-DC voltage acquisition circuit of the data acquisition recorder comprises a circuit protection structure, a signal processing structure and a reference voltage structure, wherein the circuit protection structure, the signal processing structure and the reference voltage structure are connected in parallel and are connected with ground, the circuit protection structure comprises an input voltage protectionmodule, a first voltage attenuator, an overvoltage protection module and a second voltage attenuator, the signal processing structure comprises a common-mode noise suppression module, an isolation amplifier, a differential-to-single end module, a buffer amplifier and an analogue-digital converter, and the reference voltage structure is a band gap diode. Compared with an acquisition circuit of anexisting wave recorder, the AC-DC voltage acquisition circuit of the data acquisition recorder has the advantages that the circuit is relatively simple in structure and low in material cost, has multi-stage protection and isolation function and is suitable for rapid deployment of production line, and the signal data acquisition safety of the data acquisition recorder is greatly improved.

Description

technical field [0001] The invention relates to the technical field of electronic equipment hardware, in particular to a structure of an AC and DC voltage acquisition circuit. Background technique [0002] The oscilloscope is a device used to record electrical quantities or convert different electrical quantities before recording. It can record data of different electrical quantities in real time and draw curves in real time. In addition, the curves can be played back as needed. and analyse. The signal acquisition circuit of the existing wave recorder often has a complex control circuit, which makes the parameter setting of the wave recorder very complicated during the use process, which requires a high level of knowledge of the personnel, and the setting process takes time It is relatively long, which is not conducive to the rapid deployment and use of equipment on the production line. Moreover, the manufacturing cost of the existing oscilloscope is relatively high, and t...

AI Technical Summary

Problems solved by technology

The signal acquisition circuit of the existing wave recorder often has a complex control circuit, which makes the parameter setting of the wave recorder very complicated during the use process, which requires a high level of knowledge of the personnel, and the setting process takes time Relatively long, not conducive to rapid deployment and use of equipment on the production line

Moreover, the manufacturing cost of existing oscilloscopes is relatively high, the circuit structure for collecting AC and DC voltages is relatively complex, and maintenance is difficult

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