acoustic sensor Articles
-
Wastewater force main management – internal corrosion survey using inline methods
In our first post about Wastewater Force Main Management, we looked at how preliminary analysis helps operators develop a plan for managing their system. After completing this process, operators can begin putting the plan into action with preliminary surveys on specific force mains. For those at WEFTEC, you can visit Pure Technologies at Booth #1382 to find out more information on successful ...
-
The Use of Untethered Acoustic Ball Technology To Locate Leaks in Pressurized Water Mains - Case Study
A CAUTIONARY CASE STUDY: MINNEAPOLIS, MINNESOTA, USA Investor-owned & municipal utilities may experience catastrophic damage if it relies on Untethered Acoustic Ball technology to locate leaks. As shown below, the inspection of a 10,000-feet (3km) of 36-inch (913mm) diameter Prestressed Concrete Cylinder Pipe (PCCP), gave a clean-bill-of-health with ‘NO LEAKS’ using a leading ...
-
Wastewater Force Main Management – Internal Corrosion Survey using inline methods
In our first post about Wastewater Force Main Management, we looked at how preliminary analysis helps operators develop a plan for managing their system. After completing this process, operators can begin putting the plan into action with preliminary surveys on specific force mains. For those at WEFTEC, you can visit Pure Technologies at Booth #1382 to find out more information on successful ...
-
For Malaysia Water Operator, NRW Leak Detection Program Recognized As Major Success
At Singapore International Water Week 2016, one of Pure's licencees presented a poster on two acoustic-based technologies (tethered Sahara® and free-swimming SmartBall®) used to locate 674 leaks on large-diameter trunk mains operated by this Malaysia water operator. Conducted over four months, the in-line inspection and resulting repairs has saved total of 46.7 million liters of water ...
-
Sensitivity of response of LISST-ABS and OBS to size distribution changes
This Note shows how the calibration of the LISST-ABS acoustic backscatter sensor and of optical backscatter sensor (OBS) changes when water contains a broad distribution of particle sizes, and why LISST-ABS is inherently superior. Particle size distributions in water are usually not very narrow, i.e. particles of more than a single size exist in suspension. It is common practice to consider ...
-
Case study - Fred Hartman Bridge - Harris County, Texas
Service: SoundPrint - Bridges Client: Texas Department of Transportation (TxDOT) Project Date: 2002 Type of Bridge: Fan arranged cable-stayed bridge Length: 4.185 kilometres (2.60 mi) The Fred Hartman Bridge was opened to traffic in 1995 and is one of the largest cable stayed bridges in the United States. The cable stayed bridge portion of the bridge is 754 m. long, consisting of steel ...
-
BBC: Tracking Down Three Billion Litres of Lost Water
“The other technology helping to make water pipes smart is narrowband internet of things (NB-IoT) communications – a means of transmitting signals from thousands of remote sensors that uses just a small slice of bandwidth to do so. It means that pipe sensors can send far more frequent updates to a central server without draining their batteries, which are meant to last for years. ...
By Gutermann AG
-
Flow Profiling on Demand – Illuminating the reservoir with Silixa’s intelligent Distributed Acoustic Sensor (iDAS) and ULTIMA Distributed Temperature Sensor (DTS)
As energy demands increase rapidly, the goal of energy companies is to maximize ultimate recovery in an economically sound manner. One critical capability is the accurate measurement and monitoring of production from individual layers / perforated intervals in a multi-zone completion. This data allows operators to optimize zonal production, improve recovery, increase production per well and ...
By Silixa Ltd
-
Acoustic emission source localisation on bone using multiple regression
A regression source location algorithm is developed to locate microcracks in bovine bone samples. Bone samples measuring 60 mm long, 22 mm wide and 5.5 mm thick were harvested from bovine femora. Artificial acoustic emission sources were created on the bone samples. The known location of these acoustic emission sources and the recorded arrival times at four acoustic emission sensors were used to ...
-
Rapid detection of sewer defects and blockages using acoustic-based instrumentation
Sewer flooding incidents in the UK are being increasingly associated with the presence of blockages. Blockages are difficult to deal with as although there are locations where they are more likely to occur, they do occur intermittently. In order to manage sewer blockage pro-actively sewer managers need to be able to identify the location of blockages promptly. Traditional closed-circuit ...
-
Types of Rain and Snow Sensors
Rain and snow sensors are an essential tool used in many industries, from agriculture to transportation. These sensors are designed to measure the amount of precipitation that falls in a given area, allowing individuals and organizations to make informed decisions about how to respond to weather conditions. Types of Rain and Snow Sensors There are several different types of rain and snow ...
-
Metropolitana milanese reduces water loss on critical steel pipeline
Assessing the condition of buried water infrastructure can yield a variety of outcomes that are difficult to predict. Sometimes, they even seem random. The common belief that the age of a pipe determines its condition is rarely correct – in many cases, a newer main can be in worse condition than one twice or three times as old. Instead, operational, environmental and installation factors ...
-
Development of a novel odor measurement system using gas chromatography
This paper describes a novel odor measurement system for creating arrays of virtual chemical sensors with nonoverlapping responses using ultrahigh-speed gas chromatography with a surface acoustic wave sensor (GC/SAW). This GC/SAW system provides high-resolution twodimensional olfactory images for easy recognition of many complex odors. Separation and quantification of the individual chemicals ...
-
Rockfall precursor detection based on rock fracturing monitoring by means of optical fibre sensors
The monitoring of the acoustic emissions (AEs) due to rock fracturing allows the detection of the rockfall precursor signals, leading to a strong improvement of the real time assessment of the induced risk. A network of piezoelectric sensors (PZTs) provides reliable AE data, as testified by a series of applications in non–destructive testing, but PZTs are strongly affected by lightings and ...
-
USGS Open File report: Field Evaluation of the Sequoia Scientific LISST-ABS Acoustic Backscatter Sediment Sensor
The USGS has evaluated Sequoia’s LISST-ABS at 10 streamflow-gaging stations, collecting LISST-ABS and suspended sediment concentration (SSC) data between January 2016 and February 2018. The evaluation also compared the LISST-ABS to standard turbidity sensors normally used by the USGS. The results are presented in this report: Manaster, A.E., Straub, T.D., Wood, M.S., Bell, J.M., Dombroski, ...
-
Technology transfer is more important than innovation
Innovation, we are told, is the key to a successful manufacturing economy. Invent and patent something and you will make money on every one made - if it is mass produced you get an on-going income. Tony Ingham of Sensor Technology Ltd looks at his experience over two decades and tries to draw some general principles that may help Britain in its new ambition to rebuild the manufacturing base. We ...
-
How the LISST-ABS works
INTRODUCTION: Sequoia’s Acoustic Backscatter Sensor, LISST-ABS is designed to measure suspended sediment concentration at a point. Unlike ADCP’s which may record similar backscatter strength at multiple points along the acoustic beams (‘ranges’), the LISST-ABS only reports backscatter signal strength at a single point about 5 cm from the transducer. The instrument ...
-
Hole Dug, Leak Found - City Of Ottawa Entrusts Smartball Platform To Look For Leaks In Tranmsission Main
When your inspection task is to survey a critical pipeline for leaks, nothing is more satisfying than trusting your technology to predict the leak location and then standing by as the client excavates the area to find a flow of water within one meter of exactly where you said it would be. The above-described "leak-where-predicted" recently happened with the City of Ottawa, when Pure Technologies ...
-
Case study - Birmingham water works board identifies 26 leaks using advanced inline leak detection
Service: SmartBall Leak Detection Client: Birmingham Water Works Board Project Date: January 2012 - ongoing Location: Birmingham, Ala Type of Pipeline: Water Transmission Main Diameter: 42-inch (1050mm) Pipe Material: Reinforced Concrete Pipe In early 2012, the Birmingham Water Works Board (BWWB) ran a successful leak detection program on 7.7 miles (12 km) of 42-inch (1050-mm) Reinforced ...
-
Tackling Non-Revenue Water by Identifying Small Leaks
Small leaks sink big ships – the same can be said for large-diameter pipes in utility networks. While large leaks or ruptures are seen as newsworthy stories accompanied by images of water flowing down the streets; smaller leaks can often be more devastating. Left undetected, they can add up over time, contributing significantly to Non-Revenue Water, and eventually, they too can lead to ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you