Saab Automobile AB

About: Saab Automobile AB is a based out in . It is known for research contribution in the topics: Radar & Signal. The organization has 760 authors who have published 890 publications receiving 11811 citations.

Highly Accurate Attitude Estimation via Horizon Detection

Abstract: Attitude pitch and roll angle estimation from visual information is necessary for GPS-free navigation of airborne vehicles. We propose a highly accurate method to estimate the attitude by horizon detection in fisheye images. A Canny edge detector and a probabilistic Hough voting scheme are used to compute an approximate attitude and the corresponding horizon line in the image. Horizon edge pixels are extracted in a band close to the approximate horizon line. The attitude estimates are refined through registration of the extracted edge pixels with the geometrical horizon from a digital elevation map DEM, in our case the SRTM3 database, extracted at a given approximate position. The proposed method has been evaluated using 1629 images from a flight trial with flight altitudes up to 600i¾?m in an area with ground elevations ranging from sea level up to 500i¾?m. Compared with the ground truth from a filtered inertial measurement unit IMU/GPS solution, the standard deviation for the pitch and roll angle errors obtained with 30 Mpixel images are 0.04i¾? and 0.05i¾?, respectively, with mean errors smaller than 0.02i¾?. To achieve the high-accuracy attitude estimates, the ray refraction in the earth's atmosphere has been taken into account. The attitude errors obtained on real images are less or equal to those achieved on synthetic images for previous methods with DEM refinement, and the errors are about one order of magnitude smaller than for any previous vision-based method without DEM refinement.

Method, system and emulsifier substance for treatment of materials containing harmful substances

Abstract: The invention concerns a method for treatment of solid and fluid materials contaminated by at least predominantly lipophilic harmful substances, in particular hydrocarbons and the like, especially for oil-infested grounds and waters, as well as suitable systems and emulsifier substances for carrying out the method. The contaminated materials, for microdispersed emulsifying of the harmful substances, is intimately mixed with at least one emulsifying substance as well as possibly with water. Subsequently, the emulsion is separated from the material while adding water, and preferentially biologically decomposed.

Process for the indication of abnormalities in vehicles driven by internal combustion engines

Abstract: The invention relates to a process for indicating abnormal conditions in a motor vehicle by inducing misfires through the absence of fuel supply. The fuel supply is interrupted cylinder by cylinder in such a manner that the supply is interrupted during a proportion of the total number of injection cycles of the respective cylinders during a first fuel supply sequence, after which the next cylinder interrupts the fuel supply for a proportion of the total number of injection cycles of that cylinder during a subsequent fuel supply sequence. The interruptions of the fuel supply take place preferably as a predetermined number of injection cycles during a fuel supply sequence, and when each injection supply sequence is of equal length or includes a certain number of injection cycles. This can give rise to a distinct signal quality from the engine, in the form of irregular, uncomfortable engine running, whilst each individual cylinder is subjected to the least possible disturbance, apart from an ideal operating condition. High cylinder temperature can be maintained for complete combustion and a low proportion of uncombusted fuel reaches the catalytic converter, which reduces the emissions from the engine.

Combined vertical farm, biofuel, biomass, and electric power generation process and facility

Abstract: Methods and associated apparatus for automatically growing agricultural crops vertically and/or in a continuous fashion throughout each year (Vertical Farm) in combination with contiguous and co-located production of biofuel, food, biomass for the purpose of carbon sequestering (carbon credits), and biomass electric power generation. A process that incorporates vast arrays of continuous-loop conveyors, towering upon vertical framework, which allow potted perennial plants to be transported throughout all stages of maturity in a manner which substantially multiplies yield per acre, allows production to proceed in both natural and artificial light, allows production and harvesting to be automated, and allows production to proceed in conditions which are highly favorable to plants but unfavorable to humans. The entire apparatus can be constructed of lightweight, cost-effective materials which afford mass-production and mass- array into vast automatic growing operations.

Estimation of Real-Time Software Code Size using COSMIC FSM

Abstract: For distributed networks which will be mass produced, such as computer systems in modern vehicles, it is crucial to find cost efficient hardware. A distributed network in a vehicle consists of several ECUs (Electronic Control Unit). In this paper we consider the amount of memory needed for these ECUs. They should contain enough memory to survive several software generations, without inducing unnecessary cost of too much memory. Our earlier work shows that UML Component Diagrams can be used to collect enough information for estimating memory size using a Functional Size Measurement method. This paper replicates our earlier experiment with more software components of a different type. We compare the results from the two experiments.