Vision systems for quality control in production lines is one of NOW’s specialities. NOW designs complete systems based on standard components, or – for machines in larger quantities – with inhouse developed electronics and algorithms for optimal cost efficiency.
NOW offers expert knowledge within vision. We deliver consultant services and develop vision components alternatively complete tailor-made vision systems.
NOW works with image analysis applications for industrial, medical and military use. The demands are often high on both real-time aspects and reliability.
A system usually consists of lighting, camera, mechanics, computer and software. NOW has the knowledge of lighting, optics, electronics, image analysis methods and system development, needed for a successful vision project.
To read more about some of our completed projects within vision, scroll down a bit.
Most of our vision system deliveries are based upon our propriatory platform Automatic Vision Test System (AVT), an easy-to-use general purpose vision software developed during 10+ years. AVT is utilized in many different applications, as quality control when producing automotive instrument clusters, clay roof tiles and steel rods.
GENERAL VISIONS PLATFORM AVT (AUTOMATIC VISION TEST)
Most of NOW’s vision systems are based on a general vision platform (AVT). AVT is an advanced graphical vision environment that is designed to perform a large amount of tasks in a flexible way. AVT offers a variety of vision tools and supports all Ethernet and Firewire cameras.
Read more about AVT
Mjukvara, Mekanik, Vision
Inspection of automatic lathing
In lathing defects may occur caused by a worn or damaged lathe steel. NOW has developed a vision system for automatic inspection of automatic lathing with high precision. Data is stored in a data base for traceability. The system can be built-in in the lathe, or mounted in a separate inspection cell.
Vision, Test & Stimuli, Mjukvara
Test of safety critical software
NOW’s vision platform AVT is used for recursive tests of safety critical software.
During the development of the software, new functions are added, and bugs are corrected. At every new release, all parts of the software must be retested to see that the functions haven’t been altered in a unwanted fashion. This is a time consuming work if a tester must watch a display to check the functions visually. NOW has developed functions to make this automatically with use of a vision system, which has resulted in lower costs, higher quality, and a more content personnel.
Optical Character Verification (OCV)
NOW has developed a vision system for Optical Character Verification (OCV) . The system is used in industries where product names and text/symbols must be clearly printed on each product. This system ensures that every product that leaves the production line meets the quality requirements applicable in their respective industry.
Mekanik, Vision, Mjukvara
Inspection of tinned cables
A vision system for inspection of tinned cables has been developed. The system looks for holes in the tinning. The cable is inspected in real time, when it passes four cameras, with the help of proprietary algorithms. The system includes a standard PC, four Firewire cameras with a 1024×768 resolution, optics and lighting.
Vision, Mjukvara, Mekanik
Inspection of production
A system has been developed for inspection of production of coaxial cables. The system continously inspects the quality of the wowen copper shield to see if there are to large openings in the braid. The system is a development of an earlier system, and comprises a standard PC, four Firewire cameras, 1024×768 pixels, lighting and optics.
Vision, Mekanik, Mjukvara, Elektronik
Quality control in 2D and 3D (TQC)
Vision system (Tile Quality Control, TQC) for difficult environments with Firewire cameras and audio analysis. The system is used for inspection/quality control in roof tile production, both in 2D and 3D. The size of the tiles is checked, and defects in the surface and edges are detected by cameras, where micrometre-thin cracks are revealed. Additionally noise analysis is used for detecting hidden cracks inside the tile.
The software is written in C++ using DirectShow and Microsoft Visual Studio.
The hardware consists of a PC with I/O-cards and external PLC and photoelectric sensors, and is built with Bosch Rexroth strut profiles around the conveyor belt.
The system is fully parameter-controlled and stores the statistics. The user can choose to save images and sound recordings for a follow-up. The system has a variety of custom variants delivered to the Swedish and Danish tileworks for different kinds of clay and concrete tiles.
Mjukvara, Mekanik, Vision
Inspection of bending
Within a very short time frame, NOW developed a vision system for inspection of bending. The system with two Firewire cameras, lighting, control electronics and PC software, automatically inspected the bending of an tinned component pin. If copper was visible, the component was not to be used. The system looked for the colour of copper, which was very effective. The customer could easily change parameters via the PC user interface, to change for example how much copper that was allowed. Statistics were saved in a database tool.
Vision application in a production line
A vision application to inspect a mechanical detail in a production line has been designed. The application looks for defects, where for example an edge may have been damaged.
Vision, Mjukvara, Elektronik
Vision systems for quality control of paper paths
NOW has developed a vision systems for quality control of paper paths in the paper industry. The system detects splicing, creases, cracks, holes, et cetera – everything that is needed to facilitate the production, make it more efficient, more profitable and ensure quality.
Mekanik, Vision, Mjukvara
Vision system for inspecting dashboards
NOW has developed a vision system for inspecting dashboards. The system is built using DirectShow and Microsoft Visual Studio .NET 2003. Cameras deliver images that are handled in real time. Possible parameters to inspect are: colour, intensity, shape, symbols, segment displays, LCD displays, indicator positions and indicator needle movement. The application encapsulates a scripting language that is easily configured through a graphichal interface. Optional controls/commands are carried out in sequence. The system communicates with the client’s control system via TCP/IP.
Measurement of a pendulum
A vision application for measurement of a pendulum. The pendulum is affected by swirls of molten steel which occur when draining the steel.
Industriell automation, Vision, Mjukvara
Vision system for plastic crates
A vision system for plastic crates, where the position of the handles is checked in production. The crates can’t be stacked if the handle is in the wrong position. An analogue camera, lighting and image processing algorithms were part of the commission.
Elektronik, Mjukvara, Mekanik, Vision
Checking of labels
A system for reading and checking of labels. A line-scan camera scans the label as it passes by, and a computer with a frame grabber board, a control board and image processing software interprets the image. The printing quality is checked, and the serial number is read and stored.
Elektronik, Mjukvara, Mekanik, Vision
Measuring cooling channels
NOW has developed vision functions for integration into the customer’s machine for measuring cooling channels etc. in tool steel. Angle and position were measured. The delivery included DLL files for integration into the customer’s application, lighting, optics, CCD-camera, camera casing, etc.
Measuring of reference marks
NOW has developed algorithms for extremely accurate (30 nm) measuring of reference marks in laser drawing machines. The reference marks have several specially designed appearances. NOW started from scanned images and optimized the image analysis algorithms to 1/20 pixel accuracy. The algorithms were implemented in C++, and executed under Unix, integrated in the client’s machine.
Elektronik, Vision, Mjukvara
CD inspection system
NOW has developed an CD inspection system, to be integrated in a machine for manufacturing CDs. NOW made a market research and selection of the fast CCD line scan camera which loads an image of the CD-writer when it spins one revolution. The image is sent to one of NOWs developed frame grabber boards, where some image processing is performed in hardware. Afterwards the image is processed with software vision algorithms, developed by NOW. After that the image is searched for surface defects, etc. Over 400 machines were manufactured using this equipment.
NOW has developed a very cost effective vision function for integration into the customer’s plate bending machine. The vision algorithms are based upon NOW’s vision library, and they find and align to reference marks. Each machine has three CMOS USB cameras.