公开(公告)号：US10955574B2

公开(公告)日：2021-03-23

申请号：US16015235

申请日：2018-06-22

Applicant: Sichuan University

Inventor： Jianfeng Liu ,  Lu Wang ,  Huining Xu ,  Jianliang Pei ,  Jun Zheng ,  Wenxi Fu ,  Xiaozhang Lei ,  Jianhui Deng

IPC: G01V1/16 ,  G01V1/18 ,  G01N29/14 ,  G01N29/22

Abstract: The invention discloses a rock damage acoustic monitoring system including an acoustic emission sensor installed in a borehole of a monitored rock mass and a ground workstation. The acoustic emission sensor is composed of an acoustic emission probe and a probe installation mechanism for installing the acoustic emission probe and a transmission mechanism for transmitting the probe installation mechanism. The probe installation mechanism includes a shell, a probe sleeve installed in the shell, an end cap fixed on the upper end surface of the probe sleeve, and a piston hydro-cylinder arranged between the top of the inner wall of the shell and the end cap. The present invention realizes the control of the moving direction of the shell and the probe sleeve by the piston hydro-cylinder component and the hydraulic pump.

公开(公告)号：US11630034B2

公开(公告)日：2023-04-18

申请号：US17866441

申请日：2022-07-15

Applicant: Sichuan University

Inventor： Jianbo Wu ,  Ziheng Huang ,  Zhaoyuan Xu ,  Qiao Qiu ,  Jun Zheng ,  Jinhang Li ,  Zhiyuan Shi

IPC: G01M99/00 ,  G05B19/04 ,  G05B19/418 ,  G05B23/02 ,  G06F18/25 ,  G06F18/214

Abstract: A method for diagnosing and predicting operation conditions of large-scale equipment based on feature fusion and conversion, including: collecting a vibration signal of each operating condition of the equipment, and establishing an original vibration acceleration data set of the vibration signal; performing noise reduction on the original vibration acceleration data set, and calculating a time domain parameter; performing EMD on a de-noised vibration acceleration and calculating a frequency domain parameter; constructing a training sample data set through the time domain parameter and the frequency domain parameter; establishing a GBDT model, and inputting the training sample data set into the GBDT model; extracting a leaf node number set from a trained GBDT model; performing one-hot encoding on the leaf node number set to obtain a sparse matrix; and inputting the sparse matrix into a factorization machine to obtain a prediction result.

公开(公告)号：US11415557B2

公开(公告)日：2022-08-16

申请号：US16699123

申请日：2019-11-29

Applicant: Sichuan University ,  Chengdu University

Inventor： Jianfeng Liu ,  Yan Wan ,  Jun Zheng ,  Lu Wang ,  Dongjie Xue ,  Chunping Wang ,  Qiangxing Zhang

IPC: G01N29/14 ,  G01N29/22

Abstract: A tempo-spatial evolution test system for rock breaking in deep and complex environment includes an acoustic emission sensor assembly and an acoustic emission amplifier assembly that are arranged on a rock mechanics test system. A triaxial cavity coupling bracket is arranged on an outer wall of the triaxial cavity and between two sets of acoustic emission sensor assemblies. The triaxial cavity coupling bracket includes a plate-shaped bracket, two sickle-shaped brackets, and at least three bracket bolts, which can be tightly wrapped on the outer wall of the triaxial cavity. A lateral side of the plate-shaped bracket vertically fixes two guide columns. The acoustic emission amplifier assembly is arranged between the two guide columns and is located above the plate-shaped bracket, and the acoustic emission amplifier assembly is connected to the acoustic emission sensor assembly through a signal line.

公开(公告)号：US10823706B2

公开(公告)日：2020-11-03

申请号：US16015218

申请日：2018-06-22

Applicant: Sichuan University

Inventor： Jianfeng Liu ,  Lu Wang ,  Chunping Wang ,  Jianliang Pei ,  Huining Xu ,  Jun Zheng

IPC: G01N29/14 ,  G01V1/42 ,  E21B49/00 ,  E21B47/14 ,  G01N29/24 ,  G01V1/52 ,  G01N29/28 ,  E21C39/00 ,  E21B47/01 ,  E21B33/13 ,  E21B47/12 ,  E21B47/00

Abstract: The present invention discloses an acoustic emission monitoring and transmission system for engineering rock mass including an acoustic emission sensor and a ground workstation. The acoustic emission sensor is installed in a borehole of the monitored rock mass and transmits a received monitoring signal to the ground workstation through a cable. The acoustic emission sensor includes an acoustic emission probe, a probe installation mechanism and a transmission mechanism which transmits the probe installation mechanism with the acoustic emission probe to a setting position inside the borehole. The probe installation mechanism includes a shell connecting to the transmission mechanism and a probe sleeve for accommodating the acoustic emission probe.