Sensors & Robotics
Sensors to measure key attributes required for quality control were designed, prototyped and field tested.
The University of Technology Sydney developed four sensors to provide key measurements for quality control of installed liners.
- Defect size measurement of CIPP and Spray Liners (robot mounted).
- Spray liner thickness measurement (robot mounted).
- CAC and Geopolymer thickness (handheld).
- CAC and Geopolymer pH measurement (handheld).
This video provides a brief overview of the sensors.
Project Deliverables
Defect Size Measurement
A sensor to measure defects in water liners (CIPP and spray liners) was developed using a combination of an infra-red laser ring projector, cameras, and an on-board computer. This sensor can measure folds, wrinkles, dimples, and bulges. It is mounted on a mini Pipe Inspection Robot. Accurately measuring the size of the imperfections in the liner is not possible using conventional CCTV and it is important to determine if the installed liner is acceptable for service, or if it should be replaced. Often a difficult decision for project managers. The development of this sensor includes a graphical user interface to allow interpretation of the scan and measurement of any user identified defects.
For pipes sized DN450 to DN600.
Spray Lining Thickness Measurement
A sensor to measure the thickness of spray liner applied using ultrasound. a key measurement identified for quality control (QC) was the thickness of application. Spray lining machines generally provide quality assurance (QA) data including the amount of resin used and rate of advance through the pipeline which can be used to provide an estimated thickness of application. Combining this QA data with QC testing will provide high confidence that the products have been correctly applied.
As spray liners are generally applied at a thickness of 3mm, sub-millimetre accuracy for measurements is required. The accuracy achieved by the equipment is: within 0.5 mm in the lab and the field trial results were within 1mm of the planned spray lining thickness.
For pipes sized DN450 to DN600.
CAC and Geopolymer Thickness Measurement
Application thickness is a key quality control check for CACs and geopolymers. UTS developed a sensor using ultrasound technology that can measure the thickness of the CAC or geopolymer application by detecting the interface between the liner and the host material. This allows spot measurements to be taken at any location, whereas using a cover meter requires the installation of a metallic bar prior to liner installation – limiting the ability to check the liner thickness to a small area.
This sensor is designed for initial non-destructive post-curing quality control. CACs in particular can gain thickness over time, so using this sensor years after application will not provide relevant data.
For pipes and maintenance structures sized for personnel entry.
Acid Permeation Sensor
CAC and geopolymer liners provide corrosion resistance for wastewater assets. Knowing when the acid has permeated the liner and started to attack the host structure was identified as a key measurement for long-term performance and asset management decision making. A very low impact measurement device was developed to measure the pH level at various depths on the liner to determine how far the acid has penetrated.
For pipes and maintenance structures sized for personnel entry.
Resources
Measuring CIPP and Spray Liner Imperfections Overview
Measuring CIPP and Spray Liner Imperfections Overview…
Measuring CIPP and Spray Liner Imperfections (Technical)
Some more technical details are provided in this fact sheet on measuring spray liner imperfections. Measuring CIPP and Spray Liner Imperfections Technical Documentation…
CAC and Geopolymer Thickness Sensor
CAC and Geopolymer Thickness Sensor…
Smart Linings – Project Fact Sheet
Smart Linings Project Fact Sheet…
Smart Linings Technical Workshop (2019)
Technical workshop were held in Melbourne, Sydnay, Brisbane, Perth and Adelaide in October and November 2019. The Adelaide workshop was recorded, links to each of…
Smart Linings – Sensors: GUI Demo for Defect Measurements
Smart Linings – Sensors: GUI Demo for Defect Measurements UTS takes us on a short tour of the user interface for the CIPP and Spray…
Smart Linings Sensors Poster (Ozwater21)
Download poster…
Smart Lining Literature Review – Sensors and Robotics
Download literature review…
Smart Linings Feasbility Study – Embedded Sensors
Download feasibility study…
Smart Linings Project: Media and Articles
Please see links below for articles related to the project: CRC unveils $3m water and sewerage pipes makeover research project (8 February 2018) – Australian…
Smart Linings Project – Summary Report
This report provides an overview of the deliverables from the CRC-P: Smart Linings for Pipe and Infratstructure Project and where to access them. Smart Linings…