Patent ID: 11933820
Assignee: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 9:
10. A detection apparatus comprising:
a processor; and
a memory coupled to the processor and having processor-executable instructions stored thereon which when executed by the processor cause the detection apparatus to:
obtain P pieces of amplification information, wherein the P pieces of amplification information are respectively amplification factors of P amplification apparatuses, P is a positive integer greater than or equal to 2, the detection apparatus is mounted in a target device, a current detection system is mounted in the target device, and the P amplification apparatuses are a group of amplification apparatuses in the current detection system;
determine a target port from P ports based on the P pieces of amplification information and reference information, wherein the P ports one-to-one correspond to the P amplification apparatuses, and the port is configured to output an output signal of the corresponding amplification apparatus;
determine a detection result corresponding to the target device based on a signal output through the target port; and
wherein the current detection system comprises:
a printed circuit board, wherein N Rogowski coils are mounted on the printed circuit board;
N groups of amplification apparatuses, wherein each of the N groups of amplification apparatuses comprises at least one amplification apparatus, and N is a positive integer greater than or equal to 1;
wherein the nth Rogowski coil in the N Rogowski coils is capable of being mounted concentric with the nth current-carrying conductor in N current-carrying conductors, and the nth current-carrying conductor is perpendicular to a plane of the nth Rogowski coil, n=1, N;
wherein an output end of the nth Rogowski coil is connected to an input end of a first amplification apparatus in the nth group of amplification apparatuses in the N groups of amplification apparatuses;
wherein the first amplification apparatus comprises an amplifier circuit and an active inductance circuit, and an output end of the amplifier circuit is connected to an input end of the active inductance circuit;
wherein the amplifier circuit is configured to:
amplify an obtained input signal, and output a first output signal, the first output signal comprises a first direct current signal and an amplified input signal, the first direct current signal is a direct current signal generated by the amplifier circuit, the input signal comprises an alternating current signal, and the amplified input signal comprises an amplified alternating current signal; and
the active inductance circuit is configured to: obtain the first output signal, perform direct current component suppression processing on the first output signal, and output a second output signal, wherein the second output signal comprises a second direct current signal and an amplified alternating current signal, the second direct current signal is a direct current signal generated by the active inductance current, and the second direct current signal is weaker than the first direct current signal.