Isolated power grid voltage sampling device with temperature compensation and sampling method

Abstract

The invention provides an isolated power grid voltage sampling device with temperature compensation and a sampling method, and the device comprises a voltage dividing unit which is used for receivinga voltage of an input power grid and dividing the voltage of the input power grid; a temperature compensation unit which is connected with the voltage dividing unit and is used for carrying out temperature compensation on the divided voltage signal; an isolation unit which is connected with the temperature compensation unit and is used for electrically isolating the voltage signal subjected to temperature compensation through a nonlinear optocoupler; and a signal processing unit which is connected with the isolation unit and is used for amplifying and filtering the isolated voltage signal so as to realize sampling of a power supply network. The sampling of the power grid voltage is achieved based on the nonlinear optocoupler and the mode of compensating the temperature drift of the nonlinear optocoupler, the precision requirement of voltage sampling is met, and the cost is reduced.

Description

technical field [0001] The invention belongs to the field of grid voltage acquisition, and relates to a sampling method for isolated grid voltage, in particular to an isolated grid voltage sampling device and sampling method with temperature compensation. Background technique [0002] With the development of electronic technology, the sampling of electrical parameters has been widely used in scientific research and engineering practice, and higher requirements are put forward for the accuracy and stability of sampling. The sampling of circuit voltage plays an important role in the sampling of electrical parameters, and the circuit voltage is also one of the important data for monitoring the operation of the circuit. At the same time, analog electronic technology plays a pivotal role in the field of science and technology. Communication engineering, space science, etc. all require analog circuit design, and the anti-interference performance of analog circuits is higher than t...

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Problems solved by technology

[0006] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide an isolated power grid voltage sampling device and sampling method with temperature compensation, which is used to solve the problem that the prior art cannot provide a low-cost and meet the actual application requirements. The problem with the voltage sampling method of the

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