Visual utilizes this unique inspection instrument
to fill a void left by conventional video inspection.
In the past, pipelines and ducts filled with murky
water have been left un-inspected due to the high
cost and potential down time involved with the process.
As pipelines around the world are deteriorating,
it has become a necessity to inspect these subsurface
time bombs. With sonar pipeline profiling, this
task has become amazingly fast and affordable, while
achieving outstanding results. We have integrated
this instrument with R&R Visual’s proprietary
software, allowing three-dimensional modeling of
subsurface pipelines, shafts, and ducts, as well
as real time measurement or defects, pipe size,
The equipment comprises an underwater scanning transducer
(which may be skid, raft, or robotic tractor mounted),
an sonar processor unit and a high-resolution color
monitor. The sonar processor unit and monitor are
small and rugged for the most demanding project
sites The underwater scanning unit is housed in
a stainless steel pressure vessel which is rated
at 1000m working depth.
As the scanner is moved through the pipe an indication
of the distance traveled is shown on the screen
allowing for accurate determination of the location
of defects in the pipe. Internal sensors monitor
and display Pitch and Roll indicators in analogue
and digital form on the screen to show the orientation
of the transducer unit.
resolution and update speed of the Pipe Profiling
Sonar is second to none in the field of mechanically
scanned sonars. The 2MHz acoustic signal is amplified
and logarithmically compressed prior to being
digitized by a Flash A/D converter. The angular
resolution of the system is 0.9°, which gives
400 sectors per revolution. For each sector the
data is oversampled and peak detected to arrive
at 250 range cells. The digitally generated graphics
display uses 256 colors to represent the signal
amplitude. At the minimum full-scale range of
125mm this gives a range resolution of 0.5mm and
at 3m range the resolution is 12mm.
acoustic beam width of 1.1° ensures that the
finest detail from the internal surface of the
pipe is recorded. Pitch and Roll sensors inside
the scanner record the attitude of the sonar to
a resolution of 0.1°. The sonar has been engineered
for extended operations in hostile environments.
The system has many applications other than inside
pipes where short-range high precision measurements
are required with a rapid screen update rate.
Combination Sonar / CCTV
Sonar and CCTV are both useful tools in the underground inspection world, but when combined together, they can provide incomparable deliverables.
The sonar images will be superimposed onto the CCTV image when both inspections are completed together. Generally CCTV combined with sonar is used for internal condition assessment where depth of flow of sewage varies from 25% to 75% of overall sewer diameter for sewers greater than 24-inches in diameter. Where the sewer is less than 24-inches in diameter and depth of flow of sewage exceeds 25% and is less than 75% of overall sewer diameter the operator on site will make the decision to continue the inspection or utilize one inspection method.
R&R Visual, Inc. is considered one of the leading innovators in the sonar/CCTV inspection field. Our technicians have each logged many miles of inspection, and our unique reporting options insure that you will receive useful, accurate sonar data.
Pipe Inspection System (PDF Document)
Sample Pipe Inspection Report (PDF Document)
& Transport Methods
Pipeline PowerPoint Presentation