Voltage and current isolation sampling circuit

By designing current and voltage isolation sampling circuits and using current isolation sampling chips and voltage isolation sampling chips, high-precision current and voltage isolation acquisition is achieved, which solves the problems of poor sampling accuracy and cumbersome circuits in the existing technology and simplifies the circuit structure.

CN223377387UActive Publication Date: 2025-09-23SHAANXI ZHONGKE TIANDI AVIATION MODULE
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Patent Information

Application Number
CN202422498795.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-15
Publication Date
2025-09-23
Estimated Expiration
2034-10-15

AI Technical Summary

Technical Problem

In the existing technology, the voltage and current sampling accuracy is poor, the circuit is complicated and isolated collection cannot be achieved.

Method used

A voltage and current isolation sampling circuit is designed. A current isolation sampling chip and a voltage isolation sampling chip are used. By connecting them in series in the circuit to be sampled and connecting them to the signal acquisition port of the central processing unit, isolated current and voltage acquisition can be achieved.

Benefits of technology

It achieves high-precision current and voltage isolation acquisition, simplifies the circuit structure, and prevents noise interference. It is suitable for most isolated power supply circuits that need to acquire current and voltage.

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Abstract

The utility model discloses a voltage and current isolation sampling circuit, which comprises a current isolation sampling circuit and a voltage isolation sampling circuit, and is characterized in that a current sampling end of the current isolation sampling circuit is connected in series in a circuit bus to be sampled; a current sampling output end of the current isolation sampling circuit is connected with a signal acquisition port of the central processing unit; the voltage sampling end of the voltage isolation sampling circuit is connected with voltage needing to be sampled in a circuit to be sampled, and the voltage sampling signal output end of the voltage isolation sampling circuit is connected with the signal acquisition port of the central processing unit. According to the utility model, the current isolation sampling end and the output sampling signal end are respectively connected with current in a sampled circuit and a signal acquisition port of the central processor, and parameters of circuit components are reasonably set, so that isolated acquisition of current and voltage and high integration precision are realized.
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