What if it were possible to quickly and inexpensively manufacture a part simply by using a series of close-range digital images taken of the object?
Michael Immel, instructor in the Harold and Inge Marcus Department of Industrial and Manufacturing Engineering, originally started thinking about the technique, called photogrammetry, for a different purpose, but quickly realized its application in manufacturing.
In this technique, digital images of an object that have been taken at various angles are used to create a point cloud — or a large collection of points used to create 3D representation of existing structures — from which a computer-aided design (CAD) file can be generated.
The resulting CAD file and subsequent 3D model could then be used to rebuild the part, or 3D print it, to its original specifications without using traditional methods, which are both expensive and time-consuming.
“If we can take pictures of the parts and use commercial software to create the point cloud file from the images, we can come up with the dimensions within some reasonable amount of accuracy and apply it in industry,” Immel explained.
Immel received a seed grant from his department’s Entrepreneurship and Innovation Fund to explore whether photogrammetry can be a more efficient way of manufacturing low-tolerance parts — parts that have sufficient limits of variation and do not have to fit into assemblies — such as large pipes and manhole covers.
Over the summer, Immel and three engineering students — Andrew Bellows, a graduate student in mechanical engineering; Benjamin Sattler, an undergraduate mechanical engineering student and a Schreyer’s Scholar; and Xinyi Xiao, an industrial engineering graduate student — set out to test the accuracy of photogrammetry.
The group chose parts for which they already had a CAD file to compare with their photogrammetry-created point cloud files.
To get started, Bellows created a studio setup to take consistent and replicable photographs of the part. The environment included even lighting, to eliminate shadows, and a contrasting background to ensure the photo obtained enough data from the part. Additionally, Bellows took overlapping photos around the part at a specific angle and from different distances to be sure he had enough images to create the point clouds.
Bellows, Sattler and Xiao then each used a version of software used for photgrammetry — Photomodeler Scanner, AutoDesk ReMake and Mathworks MatLab — to create point cloud files, which were then compared to each other and to the original CAD and point cloud files.
“We looked at the variance between the original point cloud files and photogrammetry point clouds to see if there are discrepancies between them and to determine how accurate this technique would be if it were to be used in manufacturing,” said Immel. “Photogrammetry has proven to be an accurate approach for applications where tight tolerances are not necessary.”
In a traditional manufacturing process, large quantities of parts are made in quick succession and then go from the manufacturing line through an inspection process. A quality control engineer or specialist then measures the parts with handheld tools and check for any abnormalities, making sure all of the dimensions of the part are within tolerance so they operate as the part was originally designed.
“The ideal application of photogrammetry in the industry setting would be to have a vision system in a manufacturing plant that included cameras fixed on the machines making the parts, taking continuous photos,” explained Immel. “Live data could be sent back to an engineer or a quality control employee and they could compare the point cloud that has been derived from the digital images to the point cloud of the original file and determine if the part is within tolerance or not.”
Immel and his team have concluded that photogrammetry has the potential to make the quality control process quicker, less expensive and more efficient for manufacturers.
Saurabh Basu, an assistant professor of industrial engineering, recently joined Immel’s research group and is interested in looking at photogrammetry from an empirical research standpoint.
“Now that we have a process in place that works, we need to hone it. Dr. Basu will help us by providing us with the empirical data before we take the process to industry to test it out,” said Immel.
The Latest on: Photogrammetry
via Google News
The Latest on: Photogrammetry
- Heartbreaking: Hungry baby whale mistakes boat for its momon January 30, 2020 at 11:58 am
At first it was thrilling for the crew and passengers aboard a tour catamaran off Lahaina, Maui — a baby humpback whale had swum up to the boat and begun nuzzling against the stern. Then it became ...
- Photogrammetry Software Market Prevalent Opportunities up to 2025on January 29, 2020 at 12:30 pm
The Global Photogrammetry Software Market Report provides a complete analysis of the market. The Report focuses on manufacturers, suppliers, segmentation according to the application, major players, ...
- Custom Control Panels With Photogrammetryon January 28, 2020 at 4:00 pm
So he decided to give photogrammetry a try. For the uninitiated, this process involves taking as many high-resolution images as possible of a given object from multiple angles, and letting the ...
- Photogrammetry Software Market Analysis by Top Companies | Autodesk, Pix4D, Acute3D, Photometrix Photogrammetry Software,on January 28, 2020 at 3:00 am
New Jersey, United States, - The report on the Photogrammetry Software Market is a compilation of intelligent, broad research studies that will help players and stakeholders to make informed business ...
- The history of Barnard Castle as new photogrammetry project sets to show the church in a new lighton January 24, 2020 at 9:11 pm
The first workshop is photogrammetry. There are places for a dozen people to learn the skills of 3D photography and then begin to try those skills out by creating items to go in a new virtual ...
- Global Photogrammetry 3D Reconstruction Marketon January 23, 2020 at 6:32 am
Photogrammetry 3D Reconstruction market is a whole history evaluation of industry, which includes an assessment of the parental market. It is a professional and a particular report focusing on ...
- Vexcel Imaging to Acquire Image Resources from Veriskon January 23, 2020 at 1:17 am
Vexcel Imaging, a leading company in aerial imagery data, large-format aerial cameras, and photogrammetry software, has signed a definitive agreement to acquire the imagery sourcing group from ...
- Verisk’s Geomni business acquired by Vexcel Imagingon January 22, 2020 at 4:23 am
Vexcel Imaging, a Boulder, Colo.-based company that provides aerial imagery data, large-format aerial cameras and photogrammetry software, signed a definitive agreement Tuesday to acquire the ...
- Vexcel Imaging to Acquire Image Survey Expertise and Data Assets from Verisk to Support New Strategic Partnershipon January 21, 2020 at 5:15 pm
Vexcel Imaging, a leader in aerial imagery data, large-format aerial cameras, and photogrammetry software, today signed a definitive agreement to acquire the imagery sourcing group from Verisk’s ...
via Bing News