公开(公告)号：US20220349713A1

公开(公告)日：2022-11-03

申请号：US17626299

申请日：2021-07-28

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Zhenguo JING ,  Wei PENG ,  Ang LI ,  Yueying LIU ,  Qiang LIU ,  Zhiyuan HUANG ,  Yang ZHANG

IPC: G01C19/72 ,  G01B9/0209

Abstract: A white light interferometric fiber-optic gyroscope based on a rhombic optical path difference bias structure includes a laser, a rhombic optical path difference bias structure, a fiber coil and a photodetector. The white light interferometric fiber-optic gyroscope adopts an all-fiber structure to simplify the complexity of a gyroscope system and reduce the overall cost. A white light interferometric demodulation algorithm is used to realize linear output of rotation rate signals.

公开(公告)号：US20220026297A1

公开(公告)日：2022-01-27

申请号：US17259847

申请日：2020-08-26

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Zhenguo JING ,  Wei PENG ,  Yueying LIU ,  Qiang LIU ,  Ang LI

IPC: G01L9/00 ,  G02B6/255

Abstract: A miniature diaphragm-based fiber-optic tip FP pressure sensor, and fabrication method and application thereof. A miniature diaphragm-based fiber-optic tip FP pressure sensor includes an optical fiber, a hollow-core optical fiber, and a pressure sensing diaphragm, wherein the optical fiber and the hollow-core optical fiber have the same diameter, the two are spliced by arc welding; and the pressure sensing diaphragm is bonded to the endface of the hollow-core optical fiber by hydroxide catalysis bonding. The FP pressure sensor can not only realize the all-silica structure of a sensor, but also make the joint of each component free of organic polymer, and has extremely high long-term stability and thermal stability. Meanwhile, by means of a fabrication method of the miniature diaphragm-based fiber-optic tip FP pressure sensor, the application range and service life of the sensor are increased, and fabrication costs are reduced.

公开(公告)号：US20220186677A1

公开(公告)日：2022-06-16

申请号：US17310358

申请日：2019-12-17

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Liyan FENG ,  Min PAN ,  Wenjing QU ,  Zhen GONG ,  Zhengran YU ,  Hongjie SUN ,  Zixin WANG ,  Qiang LIU

IPC: F02F1/20 ,  F01M11/02 ,  F02F1/22

Abstract: Provided is a method for preventing the accumulation of cylinder oil at scavenging ports of low-speed marine engines. An oil passage is provided on a cylinder wall inside a cylinder. The oil passage includes multiple oil storage grooves processed in a circumferential direction of the cylinder wall. The oil passage is formed by obliquely extending from the inner side of the cylinder wall to the outside of the cylinder in a radial direction of the cylinder. The scavenging ports are uniformly distributed in a circumferential direction of the cylinder wall, and each of the oil storage grooves is correspondingly processed at an upper portion of the scavenging port upper edge of the scavenging port. Each of the oil storage grooves has a shape matching the curved surface of the scavenging port upper edge.