Broadband differential current proportional error measuring device and method and self-calibration method
A technology of error measurement and current ratio, applied in measurement devices, measurement of electrical variables, measurement of current/voltage, etc., can solve problems such as current inconsistency, capacitive leakage, etc., to achieve reasonable self-calibration process, accurate measurement results, and novel structure Effect
Active Publication Date: 2017-08-04
JILIN UNIV +1
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Problems solved by technology
For this series connection method, the low-end potential is in a "floating" state, which is easy to cause the influence of capacitive leakage, so that the current flowing through the compared impedance is inconsistent, especially when the frequency is high
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[0031] The present invention will be described in detail below in conjunction with the drawings and embodiments:
[0032] Such as Figure 1 to Figure 4 As shown, the broadband difference current ratio error measurement device of the present invention includes an iron core magnetic ring, which can use a high-precision iron core magnetic ring, which has reliable stability and consistency under broadband conditions The advantages. The iron core magnetic ring is provided with a primary winding, an insulating layer and a secondary winding N in sequence from the inside to the outside 0 , The primary winding is wound with a twisted pair with an outer insulating layer to form the first sub-primary winding N wound by the first wire 1 And the second sub-primary winding N wound by the second wire 2 . The two ends of the first wire and the two ends of the second wire in the twisted pair are respectively connected to the primary winding terminal; A 1 And B 1 Are the first sub-primary winding...
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The invention discloses a wide-band differential current proportional error measuring device and method and a self-checking method. The wide-band differential current proportional error measuring device includes an iron core magnetic ring, and the iron core magnetic ring is sequentially arranged with The primary winding, the insulation layer and the secondary winding, the primary winding is wound with a twisted pair to form the first sub-primary winding wound by the first wire and the second sub-primary winding wound by the second wire; the secondary winding adopts The enameled wire is wound, and the parallel circuit composed of the sampling resistor and the AC voltmeter forms a series circuit with the enameled wire through the secondary winding terminal. The invention can measure and calibrate broadband AC current and AC impedance, determine the proportional relationship between two currents, has the advantages of high measurement accuracy, stable and reliable use, and is suitable for accurate measurement of multi-channel current proportional errors.
Description
Technical field [0001] The invention relates to the measurement field of a broadband alternating current proportional relationship in the field of electromagnetic measurement, in particular to a broadband difference current proportional error measurement device and method, and a self-checking method. Background technique [0002] In the measurement process of broadband AC current and AC impedance, the AC impedances that are compared with each other are generally connected in series. For this type of series connection, the low-end potential is in a "floating" state, which is likely to cause capacitive leakage, which makes the current flowing through the impedance to be compared inconsistent, especially at higher frequencies. In order to solve the above problems, a reactance shunt can be used to generate two common ground current outputs, and the compared AC impedances are connected in parallel, so that the low end of the compared AC impedance is common ground, thereby eliminating ...
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IPC IPC(8): G01R19/10G01R27/02G01R35/00
Inventor 刘文芳林君靳振宇潘仙林邵峰张保健
Owner JILIN UNIV