Current sampling device, system and method
A technology of current sampling and current collector, which is applied in the direction of measuring current/voltage, measuring device, measuring resistance/reactance/impedance, etc., and can solve the problem that the current cannot be sampled
Inactive Publication Date: 2020-10-02
GUANGDONG GREATER BAY AREA INST OF INTEGRATED CIRCUIT & SYST
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[0003] Based on this, it is necessary to provide a current sampling device, system and current sampling method for the problem that the current in the light load working circuit cannot be sampled
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[0047] In order to make the purpose, technical solution and advantages of the present application clearer, a current sampling device, system and current sampling method of the present application will be further described in detail through the following embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.
[0048] The serial numbers assigned to components in this document, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "connection" mentioned in this application all include direct and indirect connection (connection) unless otherwise specified. In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", ...
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The invention relates to a current sampling device, system and method. The current sampling device comprises a current acquisition device, a voltage acquisition device and a processing device, the current acquisition device comprises a plurality of current collectors connected in series in sequence, and the current acquisition device is connected in series in a working line. When the current in the working line is too small, the partial voltage of the current acquisition device is increased through internal resistance of the plurality of current collectors, then the working voltage at two endsof the current acquisition device is detected through the voltage acquisition device, and finally, the current of the working line can be calculated only by calculating the ratio of the working voltage to the total internal resistance of the plurality of current collectors through the processing device. According to the current sampling device provided by the embodiment of the invention, the technical problem that the current in the light-load working line cannot be sampled in the prior art is solved, and the technical effect of conveniently and effectively collecting the current in the light-load working line is achieved.
Description
technical field [0001] The present application relates to the technical field of electrical equipment, in particular to a current sampling device, system and current sampling method. Background technique [0002] Current sampling is a commonly used technical method in circuits and electrical equipment. At present, in the power grid system, the current sampling in the circuit is mainly carried out by measuring devices such as ammeters, such as using a single resistor in series, Hall sensors and other methods. . Although the existing current sampling methods can meet the current sampling requirements in a large numerical range, the current in the light-load working circuit is often very weak. When the current is small enough, it is no longer in the collection range of the current collection equipment, so it cannot The current in the working line is collected, so the current in the light-load working line cannot be sampled. Contents of the invention [0003] Based on this, ...
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IPC IPC(8): G01R19/00G01R27/02
CPCG01R19/00G01R27/02
Inventor 王文洲王云任广辉张瑞强於挺
Owner GUANGDONG GREATER BAY AREA INST OF INTEGRATED CIRCUIT & SYST