In control, with advanced technology
First publishedin World Highways
Doosan's teleoperation system has now been unveiled
Machine control technology continues to advance, with new systems offering contractors major gains in working efficiency
The latest developments in machine control technology once again push the bar in terms of advancements. The latest systems allow contractors to work even more effectively and efficiently than before.
Doosan has unveiled one of the first uses globally of 5G technology to remotely control construction and quarrying machines. The firm has coined the term ‘TeleOperation’ to describe the remote operation of construction equipment, demonstrating the control of a DX380LC-5 excavator over 8,500km away.
TeleOperation has been co-developed with LG U+, the South Korean telecommunications and data services company. Doosan claims that its TeleOperation trial is the first to remotely control a machine across such a large distance between locations using 5G telecommunications technology.
For TeleOperation to function properly, it is essential to provide the operator with live and reliable video streaming with minimal time lag. With its ultra-reliability and low latency (signal delay), the new 5G network overcomes these issues in the Doosan system, providing 10 times faster bandwidth and 10 times lower latency than the 4G network.
Special features incorporated include a low latency video transmission module with fast video transfer (with encoding and decoding). LG U+ has also introduced new modules providing low latency image processing to further minimise the time delay.
The firm has used a standard machine for the trials and it is possible to carry out both normal operation and TeleOperation with the same machine. The firm claims that its advanced technology gives the operator real-time control of the remote excavator and with high accuracy.
Leica Geosystems, part of the Hexagon group, is extending the use of its MC1 software to excavators, whose activities can now be tracked in real time. It has also issued an upgraded Leica ConX web interface.
The new excavator control package from Leica Geosystems offers high accuracy
Released two years ago, ConX is a cloud solution that creates a connected system across construction sites, linking operators, foremen and managers on a single digital platform. They can share and visualise positioning, reference model and constructed data, while other machine control solutions connected to the interface can remotely receive and share information.
In the upgraded version of ConX, a new 3D visualisation of the worksite is created from data aggregation. This enables contours of the site to be shown so that, for example, an indication of the volume of earth to be moved is available immediately.
“I can estimate how much time I need to complete the task. I don’t need to get information from the field on a daily or weekly basis, which has been traditional,” said Sten Kristensen, machine control division product management director. “The beauty about this [system] is that the information could come from 10 excavators, 10 dozers or 10 dump trucks. They all report back.”
The latest version of the MC1 software, meanwhile, enables tool recognition for excavators, allowing the automatic detection of any construction tool connected to the excavator. This significantly decreases the chance of using improper buckets that could cause over-digging, increasing efficiency and productivity for operators, according to the company.
The MC1 software has previously been applied to a variety of plant such as asphalt pavers and compactors. “Now, as a project manager, I can see what that [individual] excavator is doing in real time,” said Kristensen.
Meanwhile, Topcon Positioning has developed a new automated version of its 3D modular solution for excavation that is based around the latest technology. The new X-53x automatic package utilises the same proven components of the original system but now features an additional automated control.
Andy McCann, machine control business development manager at Topcon Positioning explained that the new package adds automatic features, rather than the light bar indicator use previously. This further reduces the risk over-cutting, with an ensuing requirement for reinstatement, and ensures that machines work accurately to grade. There is a physical restraint from excess cuts and he said, “We added a valve block to the machine to stop it from over-digging. Now it will lock out and not dig below grade.”
Topcon Positioning is offering its upgraded X-53x excavator control package
This system also uses updated technology to provide more accurate readings for geolocation. He continued, “We have two GPS antenna on the back to locate the machine and sensors pick up pitch and roll of the boom and dipper.”
And the system also provides an audible warning to the operator of any danger zones to avoid, such as overhead power cables. This can be pre-preogrammed so that if a machine is working close to live traffic for example, it will prevent it from slewing into the path of oncoming vehicles. A further benefit of the system is that it helps to reduce operator fatigue when a machine is being used for digging to grade in flat, stepped or sloped applications.
Murray Lodge, senior VP, Construction said, “With the automatic excavation system, the risk of over-digging is minimised, while productivity is maximised saving time and reducing costs.”
The automatic excavation system also features a new calibration method that uses a total station which communicates wirelessly with the system, rather than typing in values manually. This is quicker and reduces the risk of errors. A further benefit of this technology is that it can be used as a retrofit. The firm says that its earlier 2D package can now be upgraded to 3D status, also incorporating the new fully automatic excavation package.
The company says that this new system is being released alongside a new version of the Topcon Haul Truck application, which uses an Android or iOS app that can be installed on a smartphone or tablet. It is designed to provide a complete cloud-based, real-time haul management and reporting infrastructure.
“The new Haul Truck app is integrated in the Topcon site management platform and provides a complete load tracking and reporting system as well as real-time truck reporting during haul operations. The app pairs nicely with the new X-53x automatic for a more safe and integrated excavation and loading ecosystem,” said Lodge.
From Trimble comes a number of new systems. The company is expanding the capabilities of its Earthworks package and the new Grade Control Platform version 1.9 can offer fully automatic guidance for excavator tiltrotator attachments. In addition the package allows Trimble Universal Total Stations to be used with graders. Using the system allows automatic support for tiltrotators while the package is said to be easy to use and learn, even for operators who have never used a tiltrotator.
The Earthworks semi-automatic boom and bucket control can now be used with tilt automatics on units from Engcon, Rototilt, and Steelwrist. The combined depth and tilt autos allow an operator to easily complex attachments to stay on grade when using a tiltrotator. Trimble Earthworks controls the boom and bucket of the excavator as well as the tilt angle of the attachment. The operator controls the stick of the excavator and rotation of the tiltrotator.
The Earthworks GO! machine control package is available from Trimble for compact machines
Meanwhile, the added capability for Universal Total Station (UTS) allows contractors using graders to achieve for fine working. Martin Wegener, worldwide product implementation manager at Trimble said, “Before, the system used dual antennas and now with the UTS it allows millimetre accuracy. You can work where the satellite signal is blocked, under bridges and in tunnels and so on.”
Wegener added, “Any of the machines supported by Trimble Earthworks get this capability also.”
This allows for more accurate grading with fewer passes, so that contractors can work to grade in a shorter time period, minimising costs and maximising productivity.
And Trimble is also adding additional upgrades to its new Earthworks GO! package, which is designed for use on compact machines. The package offers 2D grade control and can be used with grading attachments on compact machines. The company claims that the package means that contractors can boost grading accuracy when using skid steer loaders or compact loaders fitted with grading attachments. The system can connect wirelessly to a smartphone, offering contractors a sophisticated earthmoving tool. It can be used on machines from most major manufacturers and is now available for ATI Level Best PD Series box blades.
The package is designed for use by contractors in applications such as general construction, site preparation and utility work. It applications include uses for grading flat and simple slopes.
Laser guidance allows users to grade or cut profiles quickly and accurately and the firm claims that the package is easy to learn and use. Productivity can be increased by up to 20% and the package includes software that provides tools showing how best to install, commission and utilise the system. The package allows users to save a machine profile in the system, so that settings can be retained. This means that the package can be switched from one machine to another, without having to replicate set-up procedures each time.
Trimble has also added to the agreements it has with machine manufacturers. Users of Volvo CE excavators can now opt for an integrated Trimble Earthworks Grade Control Platform for 2D grade control. And users of Liebherr’s new PR736 Generation 8 bulldozers can be shipped from the factory with a Trimble Ready factory option for the Earthworks Grade Control Platform.