Subsurface imaging system and method for inspecting the condition of a structure

Patent metadata

Field	Value
Publication number	US-9851440-B1
Application number	US-201615170430-A
Country	US
Kind code	B1
Filing date	Jun 1, 2016
Priority date	Jul 27, 2015
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

In a method and system for inspecting the condition of a structure, the structure is scanned with a three-dimensional (3D) scanner. The 3D scanner includes a sensing system having one of a radar sensing device or an ultrasonic detection device. The sensing system detects 3D information about a subsurface of the structure, and the 3D scanner generates 3D data points based on the information detected by one or more of the radar sensing device and the ultrasonic detection device. A 3D model is constructed from the 3D data and is then analyzed to determine the condition of the subsurface of the structure.

First claim

We claim:

1. A method of inspecting a structure, the method comprising:
deploying one or more three-dimensional (3D) scanners to scan a structure, wherein the one or more 3D scanners are communicatively coupled to a memory;
detecting 3D information about a subsurface of the structure by implementing a sensing device including one or more of a radar sensing device or an ultrasonic detection device coupled to the one or more 3D scanners, wherein implementing the sensing device includes:
transmitting, via at least one transmitter, pulses to at least one point of a plurality of points of the subsurface of the structure;
receiving, via at least one receiver, one or more reflected signals from at least one point of a plurality of points of the subsurface of the structure; and
determining, via one or more processors, a distance from one of the radar sensing device or the ultrasonic detection device to at least one point of the plurality of points of the subsurface of the structure based on the at least one received reflected signal;
generating, at the one or more 3D scanners, a plurality of 3D data points, wherein at least one point of the plurality of 3D data points corresponds to at least one point of a plurality of points in the subsurface of the structure detected by the radar sensor device or the ultrasonic detection device during the scan of the structure; and
causing a processor communicatively connected to the memory to generate an estimation of the condition of the subsurface of the structure based on the plurality of 3D data points,
wherein receiving, via the at least one receiver, one or more reflected signals from at least one point of a plurality of points of the subsurface of the structure includes: receiving one or more waves, via at least one receiver, reflected off of at least part of the subsurface of the structure, and
identifying, via one or more processors, at least one reflection that corresponds to at least one layer of the subsurface of the structure, the at least one layer including one of a shingle layer, a tar layer, a fiberglass mesh layer or a lower layer disposed beneath the fiberglass mesh layer of a roof of the structure.

2. The method of claim 1 , further comprising causing a processor communicatively coupled to the memory to construct a 3D model from the generated plurality of 3D data points and analyze the 3D model to identify one or more features associated with the structure.

3. The method of claim 1 , wherein the sensing device comprises the radar sensing device, and deploying one or more 3D scanners includes positioning the radar sensing device coupled to the one or more 3D scanners at an elevation higher than at least part of a surface of the structure.

4. The method of claim 1 , wherein receiving, via the at least one receiver, one or more reflected signals from at least one point of a plurality of points of the subsurface of the structure includes: receiving one or more waves, via at least one receiver, reflected off of at least part of the subsurface of the structure.

5. The method of claim 4 , wherein generating, at one or more 3D scanners, the plurality of 3D points comprises:
identifying a first reflection of the one or more waves off of at least part of the subsurface or surface of the structure at the radar sensing device or the ultrasonic detection device at a first time;
identifying a second reflection of the one or more waves off of at least part of the subsurface or surface of the structure at one or more of the radar sensing device or the ultrasonic detection device at a second time different from the first time; and
identifying a third reflection of the one or more waves off of at least part of the subsurface of surface of the structure at one or more of the radar sensing device or the ultrasonic device at a third time different from the first and second times.

6. The method of claim 5 , further including recording at least the first, second, and third times, via one or more processors, of the first, second, and third reflections of the one or more waves off of at least one point of a plurality of points of the subsurface or surface of the structure.

7. The method of claim 1 , further comprising calculating, via one or more processors, a number of layers in the subsurface of the structure by adding up a number of reflections received by the at least one receiver that corresponds to one or more separate layers of the subsurface.

8. The method of claim 4 , further comprising calculating, via one or more processors, a thickness of at least one layer of the subsurface by converting a time between at least two separate reflections into distances traveled by the waves, the distance corresponding to at least one layer of the structure.

9. The method of claim 1 , wherein
detecting 3D information about a subsurface of the structure by implementing the ultrasonic detection device coupled to the one or more 3D scanners across a surface of the structure further includes applying a sound conducting material to the plurality of points on a surface of the structure; and
positioning at least one transducer of at least one ultrasonic detection device onto a portion of the substrate applied to the surface of the structure, such that the at least one transducer physically contacts the sound conducting material that is in contact with the surface of the structure before transmitting pulses to at least one point of the plurality of points of the subsurface of the structure.

10. The method of claim 9 , further comprising collecting remaining sound conducting material disposed on the surface of the structure via one or more of a suction device or vacuum coupled to the 3D scanner.

11. The method of claim 1 , further comprising identifying, via one or more processors, a first plurality of points within a shingle layer of the subsurface, a second plurality of points within a tar layer of the subsurface, and a third plurality of points within a fiberglass layer of the subsurface.

12. A property inspection system for inspecting the condition of a physical structure, the property inspection system comprising:
one or more three-dimensional (3D) scanners adapted to scan a surface of the roof;
a sensing device including one or more of a radar sensing device or an ultrasonic detection device coupled to the one or more 3D scanners, each of the radar sensing device and the ultrasonic detection device having at least one transmitter, at least one receiver, and at least one processor, each sensing device adapted to detect 3D information about a subsurface of the structure by: (1) transmitting, via the at least one transmitter, pulses to at least one point of a plurality of points of the subsurface of the structure; (2) receiving, via at least one receiver, one or more reflected pulses from at least one point of a plurality of points of the subsurface of the structure, including receiving one or more waves, reflected off of at least part of the subsurface of the structure, and identifying, via one or more processors, at least one reflection that corresponds to at least one layer of the subsurface of the structure, the at least one layer including one of a shingle layer, a tar layer, a fiberglass mesh layer or a lower layer disposed beneath the fiberglass mesh layer of the roof of the structure; and (3) determining, via at least one processor, a distance from one or more of the devices to at least one point of the plurality of points of the subsurface of the structure based on the at least one received reflected pulse;
at least one processor adapted to generate 3D data points corresponding to the 3D information detected by the radar sensing device or the ultrasonic

Assignees

• State Farm Mutual Automobile Insurance Co

Inventors

• Boyer Patrick H
• Tofte Nathan L
• Jordan Ii Jackie O

Classifications

• G01S15/89

  for mapping or imaging · CPC title

• G01S7/411

  Identification of targets based on measurements of radar reflectivity (G01S7/415 takes precedence) · CPC title

• G01S13/89 Primary

  for mapping or imaging · CPC title

• G01S7/539

  using analysis of echo signal for target characterisation; Target signature; Target cross-section · CPC title

• G01N29/44

  Processing the detected response signal {, e.g. electronic circuits specially adapted therefor (digital signal processing per se G06F17/00)} · CPC title