In close cooperation with the Fraunhofer Institute for Process Engineering and Packaging IVV, Hohe Tanne GmbH and Matrix Vision GmbH, iiM AG has developed lighting for the intelligent tank cleaning system Adaptive Jet Cleaner AJCsens. The compact, mobile jet cleaner with image processing system enables the detection and targeted cleaning of even hard-to-reach internal geometries, such as baffles, agitator blades or sensor connections. The contamination status of the tank is recorded in real time. This means that cleaning success can be checked and documented for the first time. Up to 60% of resources (water, chemicals, time) are saved by adapting the cleaning program to specific locations and products.
The contamination is detected on the basis of fluorescence, which is stimulated by ultraviolet light from a spotlight. The light emitted by the dirt particles has less energy than the previously absorbed light – a high light yield is therefore required for a high-contrast camera image. This is achieved by using a high power UV LED of the latest generation and integrated power electronics. Optics in front of the LED also focus the light on a defined area. Because the lower the degree of soiling, the brighter and more selective the lighting must be.
On the one hand, however, the high output means that the dirt’s fluorescence is outshined by the light from the lighting itself. The light from the illumination can only be eliminated from the camera image by separating the excitation and transmission wavelengths using coordinated lens and illumination filters. As a result, the fluorescent dirt particles appear brightly lit against a dark background in the camera image.
On the other hand, heat management is becoming increasingly important for a stable process at higher outputs. The lighting is integrated directly into the housing of the AJCsens, which requires a particularly compact design and makes heat convection difficult. Due to the special housing and the use of highly conductive materials, the generated heat is largely dissipated via the integrated air cooling system.
Despite the tight installation space, all power electronics are integrated in the lighting housing. This is part of the intelligent process control, so that the lighting can be pulsed synchronously with the camera. Switching the lighting on and off regularly instead of running it continuously not only has a positive effect on heat management, but also extends the life of the system.
A reliable OEM solution was developed together with the project partners, taking into account the tight installation space, the difficult heat convection and the high optical requirements of the fluorescence application. Thanks to the many years of expertise in the machine vision market, iiM AG has already been able to successfully solve numerous customer applications – either by developing specific lighting concepts or by adapting existing LUMIMAX® Lighting, for example according to the requirements for hygienic design for direct contact with food.
At this year’s VISION, as one of the fair’s highlights, at the iiM AG stand, you can control a model of AJCsen live and receive detailed advice on customer-specific lighting solutions. iiM AG invites you to visit their stand 10D51. More information about LUMIMAX® The product range can also be found at: www.lumimax.de