Saab AB

About: Saab AB is a company organization based out in Thun, Switzerland. It is known for research contribution in the topics: Antenna (radio) & Signal. The organization has 862 authors who have published 928 publications receiving 8807 citations. The organization is also known as: Saab AB & Svenska Aeroplan AB.

Microwave Heating as a Method to Improve Sanitation of Sewage Sludge in Wastewater Plants

Abstract: For long-term sustainable agriculture, it is critical that we recycle nutrition to the soil that it came from. One important source is sewage sludge, but it must be sanitized from undesired pathogens before it may be spread on arable land. One common method today is deposition in about six months or more. Not only is such a long deposition-time costly due to the required storage-space, in the future usage of the method is likely to be more restricted from a regulatory perspective. To heat up sewage-sludge is a known method to speed up the sanitation process. However, achieving an even guaranteed temperature is not easy with porous sewage sludge. This is mainly due to the limited heat conductivity of the sludge. Microwaves at a frequency of 2.45 GHz have a penetration depth of a few centimeters and therefore has an advantage compared to other heating methods which only heats the surface. In the proposed system, the sewage sludge is continuously processed through a series of microwave cavities. The pathogen removal effectiveness was studied for different exposure settings, e.g., conveyor speed and applied microwave power in each cavity.

Method for handling different versions of an application, and an automation system

Abstract: The invention relates to a method in an automated system for handling at least two versions of an application. The system comprises a controller 8 for automation of a process by means of the application stored thereon in bidirectional connection with a communication server 2. The communication server 2 is in turn in bidirectional connection with at least two clients. By means of the method an improved communication between a communication server and several clients are provided. Graphics and images can be displayed without reconfiguration when a new version of an application is used. The invention also relates to such system.

Optical fibre sensor system for detecting temperature changes in an aircraft

Abstract: The present disclosure relates to an optical fibre sensor system (10) arranged to detect a temperature change in a zone (2, 3, 4) in an aircraft (1) having at least one zone (2, 3, 4). The optical fibre sensor system (10) comprises at least one optical fibre (11, 21, 31, 41) comprising a plurality of Fibre Bragg Gratings (20, 30, 40) for detecting a temperature change. Each of the Fibre Bragg Gratings (20, 30, 40) is reflecting radiation within a predetermined wavelength range. A radiation source unit (13) is arranged to emit radiation into the at least one optical fibre (11, 21, 31, 41). A radiation detector unit (14) is arranged to receive radiation from the at least one optical fibre (11, 21, 31, 41). A processing unit (15) is configured to identify a spectral response (22, 32, 42) of the received radiation and to determine a temperature change from the spectral response (22, 32, 42) of the received radiation in a predetermined wavelength range. Each of the at least one zone (2, 3, 4) solely has Fibre Bragg Gratings (20, 30, 40) which are reflecting radiation within the same predetermined wavelength range. The disclosure further relates to method for detecting a temperature change in a zone in an aircraft having at least one zone, by means of the optical fibre sensor system. Yet further the disclosure relates to an aircraft (1) comprising the optical fibre sensor system(10).

Helmet restraint system

Abstract: A helmet restraint system for restraining the forward and downward movement of a helmet having an unfavorable center of gravity. A buckle strap having a first end and a second end is configured to be movably disposed in a wearer's garment. The buckle strap is preloaded between its first end, which is attached to the adjustment mechanism, and its second end, which is attached to an emergency release, and is extended in a loop coming out from first and second openings respectively in the collar of the garment for connection with a snap hook on the helmet.