Bridges

We propose to inspect bridges by drone, especially for sections that are difficult to access. The captured photos can be used to recreate a 3D model of the bridge section by photogrammetry. This type of deliverable allows a coherent and structured storage of this large quantity of photos, as well as comparative monitoring over time. We are familiar with the OHS requirements of industrial sites and we make sure to perform flights in full compliance and using the most efficient technologies available on the market.

 

Advantages :

• Less expensive and faster than inspections using rope access or using a crane
• Lots of quality photos for tracking over time
• Deliverable of a 3D model that allows storing and viewing photos intuitively

 

To consider :

• Usually allow two days between request and execution for the preparation of mission plans
• Weather conditions can delay the work (rain, snow, winds)

 

Conformity :

• Transport Canada drone operator license
• Pilots certified by Transport Canada

The ultrasonic phased-array technique allows multiple angles to be used simultaneously, creating a two-dimensional pie shape view. This greater coverage of the pin and the different angles used allow optimal detection, as well as a good interpretation of the type of reflector.

 

Advantages :

• Fast scan with excellent probability of detection
• Precise positioning of reflectors

 

To note :

• Requires application of couplant to inspection surfaces
• Sensitive to irregularities at the contact surface
• Technique sensitive to very small defects; on the other hand, a crack must be of a certain depth to be characterized as such

 

Certifications:

• ASNT, SNT-TC-1A, UT and PAUT, Levels 2 and 3
• CGSB, UT, Level 2
• API, QUPA
• ASNT, UT, Level 3

Lidar-type 3D scanners have the ability to accurately model components within a large range. This technique can therefore be used to measure or follow the evolution of deformations, to model a component to be replaced or simply to obtain a 3D model of the bridge as it is.

 

Advantages :

• Very simple and fast scanning
• Accurate modeling of components (millimeter)
• Very large capture range

 

To note :

• Requires point cloud post-processing
• Delivrables available in several 2D or 3D formats

Magnetic particles non-destructive testing method is very efficient and simple to perform. It detects defects emerging at the surface in ferromagnetic materials. A magnetic yoke is generally used to create the magnetic field.

Different Techniques:

• Dry powder (yellow or red)
• Black particles on a white background ("black & white")
• Fluorescent particles (in dark environment)

Advantages :

• Fast and effective
• Excellent probability of detection
• Applicable on various geometries
• The dry powder technique is applicable at high temperature

To note :

• Applicable only to ferromagnetic materials
• Detection of surface defects, or very close to the surface, only
• Requires a clean surface (no grease)

Technician Certifications:

• ASNT, SNT-TC-1A, Magnetic Particles, Level 2
• CGSB, Magnetic Particles, Level 2

The ultrasonic phased-array technique allows multiple angles to be used simultaneously, creating a two-dimensional view in a pie shape. This greater coverage of the wall or weld section allows rapid detection of cracks on the opposite surface, as well as a good interpretation of the type of defect.

Advantages :

• Fast scans with excellent probability of detection
• Characterization and precise positioning of defects
• Volumetric inspection, not just on the surface
• As effective for inspecting "T" joints as butt joints
• Applicable on hot surfaces (variable maximum temperature)

To note :

• Requires application of couplant to inspection surfaces
• Sensitive to irregularities at the contact surface
• Technique sensitive to very small defects, on the other hand, a crack must be of a certain depth to be characterized as such (from 1 to 3 mm depending on the application)

Certifications:

• ASNT, SNT-TC-1A, Ultrasonic testing and PAUT, level 2 and 3
• CGSB, Ultrasonic Testing, level 2
• API, QUPA
• ASNT, Ultrasonic Testing, level 3

We master 3D scanning technologies which allow us to obtain accurate profiles of loss of thickness or deformation. The use of self-adhesive targets on the inspected surface allows very precise scanning of the surface profile, even on site.

Applications:

• Characterization of areas of corrosion or deformation
• Extensive damage impact assessment using finite element analysis
• Monitoring of damage development over time

To note :

• The surface must be dry and not very reflective.
• The technique models any material on the surface, so also paint, deposits or corrosion. It is necessary to clean the surfaces of interest for more precision.
• The result obtained is the profile of the modeled surface, and not directly the wall thickness, it is necessary to supplement with ultrasonic testing to judge the remaining thicknesses.
• The technique requires some clearance (min 12 ") from the surface of interest.

We generally use "phased-array" ultrasonic testing for the detection of loss of thickness over large surfaces or complex shapes.

This technique provides fast coverage and excellent interpretation of surface profiles.

Advantages :

• Precise thickness data
• Rapid coverage of large areas
• Excellent interpretation of the type of dammage
• Possible to inspect through a uniform and well-adhered paint
• Applicable on hot surfaces (variable maximum temperature)

To consider :

• Need to apply couplant to the contact surface
• It may be difficult or impossible to take measurements from a heavily corroded contact surface
• Measurements may become more difficult to take when the remaining thickness is less than 1 to 3mm (depending on the application)