Anomaly detection method and apparatus for multi-type data

    公开(公告)号:US11423260B1

    公开(公告)日:2022-08-23

    申请号:US17589888

    申请日:2022-01-31

    Abstract: The present disclosure provides an anomaly detection method and apparatus for multi-type data. According to the anomaly detection method for multi-type data, an adversarial learning network is trained, so that a generator in the adversarial learning network fits a distribution of a normal training sample and learns a potential mode of the normal training sample, to obtain an updated adversarial learning network, an anomaly evaluation function in the updated adversarial learning network is constructed according to a reconstruction error generated during training, and the updated adversarial learning network is constructed into an anomaly detection model, to perform anomaly detection on inputted detection data by the anomaly detection model, to obtain an anomaly detection result. A mode classifier is introduced to effectively resolve difficult anomaly detection when a distribution of detected data is similar to that of normal data, further improving the accuracy of anomaly detection.

    Heterodyne laser interferometer based on integrated dual polarization beam-splitting assembly and measurement method thereof

    公开(公告)号:US12287198B1

    公开(公告)日:2025-04-29

    申请号:US18595318

    申请日:2024-03-04

    Abstract: A heterodyne laser interferometer and a measurement method based on an integrated dual polarization beam-splitting assembly is provided. Technical points: The first polarization beam splitter and the second polarization beam splitter of the integrated dual polarization beam-splitting assembly are arranged in parallel. The first polarization beam splitter is attached with a first polarizer, a third polarizer, and a first quarter-wave plate; The second polarization beam splitter is attached with a second polarizer, a fourth polarizer, and a second quarter-wave plate; The output optical path of the first quarter-wave plate and the second quarter-wave plate is equipped with target mirrors, while the output optical path of the third quarter-wave plate and the fourth quarter-wave plate is equipped with photodetectors. The assembly and adjustment of the present invention is more flexible and reduce the processing difficulty and processing error.

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