Automatic patrol inspection and intelligent erosion defect detection method and apparatus for flood discharge tunnel

Patent metadata

Field	Value
Publication number	US-12429398-B2
Application number	US-202318329570-A
Country	US
Kind code	B2
Filing date	Jun 5, 2023
Priority date	Aug 26, 2022
Publication date	Sep 30, 2025
Grant date	Sep 30, 2025

Abstract

The present disclosure relates to an automatic patrol inspection and intelligent erosion defect detection method and apparatus for a flood discharge tunnel, and belongs to the technical field of patrol inspection and defect detection. The method includes: constructing a flood discharge tunnel erosion defect database; constructing a flood discharge tunnel erosion defect analysis and evaluation standard and early warning threshold; performing automatic patrol inspection; and performing image analysis processing and intelligent recognition model training. According to the present disclosure, a condition of the flood discharge tunnel can undergo automatic patrol inspection, an erosion impact degree can be rapidly recognized and determined, the downstream life safety are not in danger during flood discharge, and a patrol inspection efficiency and a detection efficiency can be noticeably improved.

First claim

What is claimed is:

1. An automatic patrol inspection and intelligent erosion defect detection apparatus for a flood discharge tunnel, comprising a patrol inspection device body ( 1 ), a top end of the patrol inspection device body ( 1 ) being provided with a protective housing ( 2 ), and an adjustment mechanism being arranged inside the protective housing ( 2 ); wherein
the adjustment mechanism comprises a connection supporting shaft block ( 3 ) arranged inside the protective housing ( 2 ), one side of the connection supporting shaft block ( 3 ) being connected to a transmission shaft rod ( 4 ), the other end of the transmission shaft rod ( 4 ) being provided with a servo driving electric motor ( 5 ) for driving, two symmetrically-arranged connection shaft ring rods ( 6 ) sleeving an outside of the transmission shaft rod ( 4 ), a portion, close to the other end, of the connection shaft ring rod ( 6 ) being internally provided with a fixing rod ( 7 ) in a penetrated manner, one side of the middle of the fixing rod ( 7 ) being connected to a connection sleeve ring block ( 8 ), one side of the connection sleeve ring block ( 8 ) being connected to a transmission platform ( 9 ), a first driving electric motor ( 10 ) being mounted on the transmission platform ( 9 ), an output end of the first driving electric motor ( 10 ) being connected to a driving rod ( 11 ), a top end of the driving rod ( 11 ) being provided with a holographic three-dimensional scanner ( 12 ), and a second driving electric motor ( 13 ) being arranged inside the holographic three-dimensional scanner ( 12 ).

2. The automatic patrol inspection and intelligent erosion defect detection apparatus for a flood discharge tunnel according to claim 1 , wherein an output end of the second driving electric motor ( 13 ) is connected to a rotary rod ( 14 ), a connection shaft block ( 15 ) sleeving an outside of the rotary rod ( 14 ), and one side of the connection shaft block ( 15 ) being fixedly connected to a measurement camera ( 16 ).

3. The automatic patrol inspection and intelligent erosion defect detection apparatus for a flood discharge tunnel according to claim 2 , wherein linkage switching mechanisms sleeve outsides of one ends of the rotary rods ( 14 ), the linkage switching mechanism comprising a driving sleeve ring rod ( 17 ) arranged outside one end of the rotary rod ( 14 ), an adjustment rotary rod ( 18 ) being movably connected into a portion, close to a top end, of the driving sleeve ring rod ( 17 ), a switching electric motor ( 19 ) being mounted at one end of the adjustment rotary rod ( 18 ), an output end of the switching electric motor ( 19 ) being fixedly connected to the adjustment rotary rod ( 18 ), an adjustment shaft ring block ( 20 ) being arranged outside the adjustment rotary rod ( 18 ) and positioned on one side of the top end of the driving sleeve ring rod ( 17 ), a first irradiation lamp ( 21 ) being mounted on one side of the adjustment shaft ring block ( 20 ), and a second irradiation lamp ( 22 ) being mounted on the other side of the adjustment shaft ring block ( 20 ).

4. The automatic patrol inspection and intelligent erosion defect detection apparatus for a flood discharge tunnel according to claim 3 , wherein a limiting screw block ( 23 ) is mounted on one side of the driving sleeve ring rod ( 17 ).

5. The automatic patrol inspection and intelligent erosion defect detection apparatus for a flood discharge tunnel according to claim 1 , wherein four supporting frames ( 24 ) are symmetrically arranged outside the patrol inspection device body ( 1 ), a portion, close to an end portion, of the supporting frame ( 24 ) being provided with a lifting electric motor ( 25 ), an output end of the lifting electric motor ( 25 ) being connected to a driving blade ( 26 ), and a level sensor ( 46 ) being mounted on one side of the driving blade ( 26 ); and a wireless transmitter ( 27 ) is arranged inside the patrol inspection device body ( 1 ), and a cambered support ( 29 ) is arranged below the two adjacent supporting frames ( 24 ), a buffer base ( 30 ) being arranged below the cambered support ( 29 ), and a bottom end of the buffer base ( 30 ) being connected to a bulged support ( 31 ).

6. The automatic patrol inspection and intelligent erosion defect detection apparatus for a flood discharge tunnel according to claim 5 , wherein an output end of the wireless transmitter ( 27 ) is connected to a wireless receiver ( 40 ), a processing device ( 41 ) being mounted at a bottom end of the wireless receiver ( 40 ), an acousto-optic alarm ( 42 ) being mounted on one side of the wireless receiver ( 40 ), a display screen ( 45 ) being embedded in one side of the processing device ( 41 ), an image memory ( 43 ) being arranged below the display screen ( 45 ), and an image processor ( 44 ) being arranged on one side of the image memory ( 43 ).

7. The automatic patrol inspection and intelligent erosion defect detection apparatus for a flood discharge tunnel according to claim 1 , wherein a first battery ( 28 ) is arranged below the patrol inspection device body ( 1 ), two leveling guide plates ( 32 ) being symmetrically arranged below the first battery ( 28 ), one opposite sides of the two leveling guide plates ( 32 ) being provided with guide grooves ( 33 ), a crossed guide block ( 34 ) being slidably arranged inside the guide groove ( 33 ), one end of the crossed guide block ( 34 ) being connected to a pushing supporting rod ( 35 ), an electric cylinder ( 36 ) being mounted at one end of the pushing supporting rod ( 35 ), a second battery ( 37 ) being arranged between the two crossed guide blocks ( 34 ), a bottom end of the second battery ( 37 ) being connected to a supporting plate ( 38 ), and one end of the second battery ( 37 ) being provided with a connection port ( 39 ).

8. An automatic patrol inspection and intelligent erosion defect detection method for a flood discharge tunnel, employing the automatic patrol inspection and intelligent erosion defect detection apparatus for a flood discharge tunnel according to claim 1 and comprising:
step 1, constructing a flood discharge tunnel erosion defect database by acquiring global flood discharge tunnel operation condition data comprising a type, position, scale, and impact of erosion generated during operation of massive global flood discharge tunnels; and then dividing flood discharge tunnel erosion defect data in the flood discharge tunnel erosion defect database into three grades, wherein a defect in grade 1 has no impact on safety of flood discharge; a defect in grade 2 has a smaller impact and is to be focused and further observed; and a defect in grade 3 has a greater impact, is to be fixed with repair measures, and indicates an early warning prompt;
step 2, constructing a flood discharge tunnel erosion defect analysis and evaluation standard and early warning threshold: constructing a defect type evaluation standard according to impact degrees, on the safety of flood discharge, of scouring, abrasion, and cavitation types: classifying no erosion on a surface of the tunnel as grade 1, an erosion depth less than 3 mm as grade 2, and an erosion depth greater than or equal to 3 mm as grade 3;
step 3, performing automatic patrol inspection through the automatic patrol inspection and intelligent erosion defect detection apparatus for a flood discharge tunnel: performing patrol inspection on an entire tunnel through laser scanning along a patrol inspection route set before take-off, performing a lighting operation, and uploading an acquired image wirelessly; and
step 4, performing image analysis processing and intelligent recognition model training: constructing an image database, processing each to-be-train image in two ways, wherein in one aspect, the image is stored

Assignees

• Huaneng Lancang River Hydropower Inc
• Univ Tianjin

Inventors

• Pang Bohui
• Xiao Haibin
• Cao Xuexing
• Chen Hao
• Meng Mai
• Chen Haodong

Classifications

• G06T2207/30184

  Infrastructure · CPC title

• G06T2207/30108

  Industrial image inspection · CPC title

• G06T2207/20084

  Artificial neural networks [ANN] · CPC title

• G06T2207/20081

  Training; Learning · CPC title

• G06T7/0004

  Industrial image inspection · CPC title