High voltage alternating signal acquisition system

Abstract

The present invention discloses a high voltage alternating signal acquisition system which is composed of a voltage division circuit, a high speed signal acquisition circuit, an isolating circuit, a data processing circuit of a single-chip microcomputer and a serial data bus. The data processing circuit of the single-chip microcomputer solves high-voltage variable frequency signals acquired by the high speed signal acquisition circuit through a data fitting algorithm and the weighted handling, and transmits the solved result to outer side through the serial data bus, thereby realizing the real-time acquisition and transmission of the high voltage variable frequency signals. Compared with the prior art, the high voltage alternating signal acquisition system realizes the real-time acquisition and transmission of the alternating signals with wide voltage and wide range, simplifies the product hardware design, improves the product reliability and has the advantages of high acquisition precision, strong environment adaptability, good anti-jamming capability, reasonable structure, high automation degree, stable performance and the like.

Description

technical field [0001] The invention relates to a signal acquisition system, in particular to a high-voltage alternating signal acquisition system. Background technique [0002] The existing high-voltage alternating signal acquisition system includes a step-down circuit, a rectification circuit, a DC signal conditioning circuit and a functional block diagram of an AD acquisition circuit. Step-down circuit: convert the high-voltage signal into a low-voltage signal that the input end of the AD acquisition circuit can withstand; rectifier circuit: organize the alternating signal into a DC signal; DC signal conditioning circuit: filter the DC signal after AC-DC conversion, etc. Conditioning; AD acquisition circuit: convert analog signal into digital signal output. There is following shortcoming in aforementioned prior art: [0003] 1. The acquisition accuracy is low, and the devices in the rectifier circuit are greatly affected by temperature; [0004] 2. When the high-voltag...

AI Technical Summary

Problems solved by technology

[0003] 1. The acquisition accuracy is low, and the devices in the rectifier circuit are greatly affected by temperature;

[0004] 2. The high-voltage signal acquisition module will generate a very high high-voltage surge during the power-on period of the acquisition terminal voltage

It is extremely difficult to suppress this high-voltage surge, and it is extremely easy to cause irreversible damage to the AD acquisition circuit;

[0005] 3. The products using the existing technology can only complete the acquisition of high-voltage signals of one frequency. When it is necessary to collect voltage signals of multiple frequencies at the same time, it needs multiple types of acquisition circuits to achieve it, which makes the application of the product have great potential. limitation;

[0006] 4. Realized by software algorithm, the speed is limited, it is not easy to filter out external interference, and the adaptability is poor

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