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Since machine control generally relies on GPS, it starts with satellites in the outer atmosphere. These satellites triangulate with one another to generate a digital map of the construction site. They then send a signal down to the site itself.
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Job site productivity and efficiency go hand in hand. You’ll find that a machine control system helps you generate faster cycle times and increased output in various work processes and project types. You may also experience better performance from your equipment by optimizing utilization.
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Machine control systems can help you reduce workplace accidents that keep team members off the job, result in expensive workers’ compensation, decrease productivity and possibly lead to Occupational Safety and Health Administration violations.
As an overseer, you can use the system software to see the whole site at once and observe every place that is being altered in real time. Best of all, with the amount of time and money saved by the precision and accuracy of the system, it will quickly pay for itself.
Once the base station has modified the GPS signal, it sends the signal out to all active rovers, usually in the form of radio waves. This modified signal is called real time kinematic, or RTK. Two types of rovers are typically used — man rovers and machines. Both types have a receiver to pick up the GPS signal and an antenna to pick up the RTK. With that information, they generate a digital 3D map of the site, from which they can determine exactly where on the site they’re positioned. They can then know what they need to do in each given spot.
As a contractor, you understand the importance of getting everything right at the job site. Machine control technology provides the precise measurements you require to meet your high accuracy standards. With this tool, you’ll experience consistent results from one project to the next, allowing you to meet your performance objectives.
While satellites, base stations and cellular reference stations are external installations, the other major components are connected to rovers. The first two items on this list — man rovers and machines — are themselves types of rovers. The others are attachments that often appear on those rovers.
As a contractor, you know the difficulty of relying on eyesight to level your earthmoving project. For you to build a solid foundation, the ground beneath it has to be adequately compacted and leveled. But from the seat of a dozer or motor grader, it’s not easy to tell if the site is at the proper grade.
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That’s why the base station is necessary. It’s kept at a specific, fixed point on the site, often attached to the top of a pole inserted into the ground. It’s also programmed with the location of that specific point, allowing it to act as a reference point. When it receives the GPS signal, it compares the two locations — the place the satellites think it is versus where it knows it actually is. Then it adjusts for the difference. By lining the two up, it shifts all the information from the satellites over to the correct position.
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Of course, this arrangement can vary across different systems. A few different types of machine control systems are available. The standard type is the one described above, but two other prominent options exist as well — cellular systems and IMUs.
GPS is fine for locating things on a large scale. But in this context, the machines need to receive results down to the millimeter scale. From thousands of miles overhead, the satellites can’t measure with that degree of accuracy. The signal has to travel an incredible distance through the atmosphere just to reach the ground. At that point, the satellites can end up with a margin of error of as much as 30 feet. For leveling ground on a construction site, 30 feet is a huge amount.
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As a business owner or supervisor, you’ll be able to make fast, accurate data-driven decisions that enhance accuracy and gain a significant market and competitive advantage. You may also experience notable improvements in process optimization that enable your crews to complete more work in less time.
We’ve now covered all the elements of machine control systems, and how they work. But what is machine control used for in the actual construction process? What equipment is it most often paired with?
With access to relevant, real-time data, you’ll be able to make faster, more informed business decisions that give your company a competitive edge. You can also engage in proactive strategic planning instead of reacting to what the rest of the industry is doing.
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A second alternative system is that which uses inertial measurement units, or IMUs. IMUs don’t measure location, but they calculate position change at an incredibly fast and accurate rate. They’re connected to the rover itself, usually two per vehicle. As the rover moves, the IMUs can determine exactly how they’re moving. They then coordinate with the location being provided by the RTK to determine precisely where the blade of the machine is at any given moment.
While construction is an obvious choice for machine control systems, these solutions can meet the needs of businesses in other pivotal industries, as well, including:
So how do they do this? The key to machine control systems comes down to GPS and GNSS. The short version is that GPS and GNSS signals are received by the (or antennas) on the tractor and provide position and elevation references on the job site. That position is compared to a digital terrain model of the proposed plans and automatically guides the cutting edge to grade.
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Such stations are owned by private entities or the government, which may require special permission and possibly a fee for contractors to use them. The advantage of these systems, though, is that they don’t require a local base station. And since they use cellular modems instead of radio waves, the signal can be broadcast much farther without decreasing in quality.
But that system could only do so much. Since the laser was an ‘elevation only’ reference it could only adjust up or down based on where the laser was. The laser system has no ability to know the position or where it is on the job site. The contractor would also need to move the laser transmitter each time he moved past the 1500’ range of distance.
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These systems enable you to work faster and complete your projects on schedule, which in turn allows you to take on more jobs and increase revenue. Also, by reducing human errors, you’ll have fewer manual adjustments that consume valuable time, significantly increasing your efficiency and productivity.
Is your company looking to operate leaner and save money by conserving valuable resources? Machine control helps you minimize material waste, which can significantly boost your company’s bottom line. Your construction or contracting firm will also become a better steward of the environment, which is important for improving public relations and optimizing customer acquisition and retention.
For machine control systems to be so precise, they have to follow a very specific process. This process largely involves tracing and modifying from several satellites to the receivers on the jobsite.
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Using machine control systems means you can increase your speed, performance and productivity while maintaining high quality. You’ll experience enhanced surface finishes and increased grading accuracy, leading to better overall project results. You can achieve this outcome via stronger adherence to all design specifications and tolerances.
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In the process outlined above, several different components work together to aid in the precision of the construction process. These components often take the form of technological devices, which send signals back and forth to one another to work the magic of machine control.
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Over the years, this problem has led to the development of machine control systems. By relying on the Global Positioning System (GPS) and Global Navigation Satellite System (GNSS) to provide position and elevation reference construction sites, today’s contractor can grade accurately and position with confidence.
Quite a few processes occur on construction sites before the building even starts. Excavating, compacting, dozing and scraping are just some of the things construction workers do before beginning to build. None of these jobs are simple under normal conditions, but they don’t have to be complicated. Here’s how machine control can be applied to several of them.
As a farmer, precision is crucial in every aspect of your operations, from planting to fertilizing and harvesting. Machine control can add value to various agriculture tasks, including:
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One alternative system relies on cellular signals instead of radio. These systems don’t use base stations. Instead, they connect to cellular reference stations somewhere outside the construction site.
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Do you typically have multiple equipment operators at your job sites? Attempting to achieve consistent outcomes with all team members can be challenging — but it’s crucial for optimizing results. You’ll discover that machine control systems make it easy and practical to standardize operating procedures, making them more predictable.
The most forward-thinking construction entities rely on targeted, relevant data for the successful planning and execution of every project step. Some of the most valuable benefits of machine control are accurate and comprehensive data collection capabilities, including real-time monitoring and reporting, right at your fingertips.
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One of the easiest ways to divide the list of machine control system components is by where they’re located — on the rover, or off of it. The overall system requires equipment of both types for it to function. Here are the main components located outside of the rover.
In the midst of the process explanation, though, it can be easy for specific terms to get lost or mixed up. For the sake of clarity and simplicity, here’s an overview of each of the individual components involved in most machine control systems.
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Time is money in the construction business — the faster your company can complete its projects, the more revenue it can generate via an increased workload. The increased speed provided by machine control is typically noticeable, measurable and impactful. You may also experience reduced downtime by optimizing your equipment and resources.
At the site, the contractor sets up a base station. Base stations receive and correct the GPS signal. This correction is necessary because the satellite signal isn’t accurate enough for precision earthwork.
With soaring diesel and gasoline prices, companies must find ways to cut back on consumption to reduce costs and maximize profits. Advanced machine control technology solutions help your equipment operate more efficiently and cost-effectively. This automation can also reduce rework, which is another advantage that allows you to avoid unanticipated and expensive project delays.
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The predecessor to this system was laser-based. A rotating laser transmitter was mounted above the machines on a tall tripod. The rotating plane of light could cover over 1500 feet of the jobsite accurately. The machines would have laser receivers attached to the top of a mast referencing the cutting edge of the blade. The laser signal striking the receiver would actuate the cutting edge up or down and then maintain when it reached the proper grade. This system was used in both construction and agriculture since the late 1960’s.
No matter what the focus of your latest construction project is, you can benefit from machine control. It can refine your leveling and hone your digging, and it can do it all while giving you feedback on where each rover is on the site at any given moment.
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Machine control systems are an incredible development for the construction industry. But what is meant by machine control? Essentially, it means that the machines used in construction are more precisely controlled to work efficiently in their environment. Take leveling, for instance — a machine control system enables grading tractors to compare a digital grading map to the position of the blade and cut it to the proper elevation and position on the job site.
This technology helps your crews achieve these crucial objectives by improving visibility and awareness, enabling team members to anticipate and avoid potentially dangerous situations before they occur. For instance, job sites can be hectic locations with multiple machines moving about, and the systems’ proximity sensors are vital to helping operators steer clear of collisions.
From an operational perspective, you’re probably seeking ways to minimize labor costs, which can represent one of the largest expenses in a construction project. State-of-the-art machine control technology can reduce your reliance on human labor for many job site tasks, contributing to increased profitability.