公开(公告)号：US20190188987A1

公开(公告)日：2019-06-20

申请号：US16221574

申请日：2018-12-16

Applicant: SHENZHEN UNIVERSITY

Inventor： Dong SU ,  Junjie HUANG ,  Zhongliang YU

IPC: G08B21/10 ,  G08B3/10

CPC classification number: G08B21/10 ,  G01V9/00 ,  G08B3/10

Abstract: A simple alarm for underground soil loss, includes an insulating installing box and an alarm loop, a rotating shaft is disposed in the insulating installing box; the rotating shaft is provided with a spring torque gauge; a bottom end of the rotating shaft is connected with a pozidriv cross recessed plate head; the spring torque gauge is connected with a first conductive metal sheet; the insulating installing box is connected with a second conductive metal sheet; the second conductive metal sheet is disposed on a motion track formed by that the first conductive metal sheet moves around the rotating shaft; the spring torque gauge, the first and second conductive metal sheets are positioned in the insulating installing box; the pozidriv cross recessed plate head is positioned outside the insulating installing box; and the first and second conductive metal sheets are arranged on the alarm loop.

公开(公告)号：US20180306653A1

公开(公告)日：2018-10-25

申请号：US15771386

申请日：2016-03-30

Applicant: SHENZHEN UNIVERSITY

Inventor： Dong SU ,  Yueqin JIANG ,  Xiaohua BAO ,  Zhongliang YU

IPC: G01L1/08 ,  G01N33/24 ,  G01L1/02

CPC classification number: G01L1/083 ,  G01L1/02 ,  G01L1/08 ,  G01N33/24

Abstract: A zero-strain soil pressure sensor includes a shell provided with a hydraulic oil cavity and a cavity located below the hydraulic oil cavity, a processor, an outer elastic film arranged at the upper end of the hydraulic oil cavity, an inner elastic film arranged between the hydraulic oil cavity and the cavity, an outer strain bridge circuit connected with the outer elastic film, an inner strain bridge circuit connected with the inner elastic film, a piston communicated with the hydraulic oil cavity, and a driving mechanism connected with the piston. The outer strain bridge circuit, the inner strain bridge circuit and the driving mechanism are electrically connected with the processor. The invention has the beneficial effect that the piston is driven by the driving mechanism to control the oil pressure in the hydraulic oil cavity, external soil pressure is balanced through the oil pressure to keep the outer elastic film in an non-deforming state all the time, and only the inner elastic film is deformed, so that the soil arch effect and soil displacement are avoided, and thus the liquid pressure measured by the inner elastic film is the soil pressure, and the measurement result is more accurate.

公开(公告)号：US20170328824A1

公开(公告)日：2017-11-16

申请号：US15529815

申请日：2016-03-30

Applicant: SHENZHEN UNIVERSITY

Inventor： Dong SU

IPC: G01N3/24

CPC classification number: G01N3/24 ,  G01L1/00

Abstract: The invention discloses a handheld constant-stiffness ring shear apparatus which comprises a base and an annular rigid frame arranged on the base in a sleeved mode, wherein an upper cover is buckled to the top of the rigid frame, a pressure transmission plate is fixed to the upper portion of the upper cover, a rotary shaft is perpendicularly arranged in the center of the base, the rotary shaft penetrates through the pressure transmission plate and is fixed to the pressure transmission plate, a spanner is fixed to the top end of the rotary shaft, and a digital display instrument is embedded in the spanner. The handheld constant-stiffness ring shear apparatus is convenient to carry, easy to operate, economical and practical and is used for measuring the volume change of a soil sample at a field location under the constant-stiffness condition in the shear force resisting and shearing process.

公开(公告)号：US20240295478A1

公开(公告)日：2024-09-05

申请号：US18663106

申请日：2024-05-14

Applicant: Shenzhen University

Inventor： Dong SU ,  Ruixiao ZHANG ,  Xiangsheng CHEN ,  Xingtao LIN ,  Wenlong HAN

IPC: G01N3/12 ,  G01N3/06

CPC classification number: G01N3/12 ,  G01N3/064

Abstract: The invention provides a high-water pressure trapdoor model test device and a use method thereof. The high-water pressure trapdoor model test device includes a PIV analysis unit, a liquid material, a solid material, pore water pressure gauges, first soil pressure sensors, second soil pressure sensors, third soil pressure sensors, a test box and a pressurizing unit. A box body of the test box is provided with an opening sealed by a base plate, a hole is formed in the base plate, a trapdoor is arranged at the hole, the third soil pressure sensors are arranged in the trapdoor, the first soil pressure sensors are arranged in the base plate, the solid material is placed on the base plate, the second soil pressure sensors and the pore water pressure gauges are arranged in the solid material, and the liquid material is placed on the solid material.