FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWAND Patent applications |
Patent application number | Title | Published |
20120253697 | MODEL-BASED METHOD FOR MONITORING THE CONDITION OF ROTOR BLADES - The invention relates to a method for monitoring the condition of rotor blades for wind turbines. It is therefore the object of the invention to increase the accuracy of the monitoring of the condition of rotor blades of wind turbines and to allow a localization of faults or defects and their exact description. In the method in accordance with the invention, eigenvibrations of a rotor blade occurring globally at the rotor blade and locally guided elastic waves are permanently detected with time and spatial resolution using a sensor network and actuator network attached to the rotor blade or using a network arrangement of ultrasound transducers. In addition, elastic waves which are guided periodically at predefinable time intervals and which are respectively emitted by an actuator or ultrasound transducer and detected by sensors or ultrasound transducers are in so doing inspected for variations of the emitted waves. | 10-04-2012 |
20110247751 | METHOD AND DEVICE FOR PRODUCING COMPOSITE MATERIAL COMPONENTS AND CONTACT PRESSURE UNIT - In the case of a process for producing composite material components, thermoplastic prepreg tapes ( | 10-13-2011 |
20110181469 | METHOD AND APPARATUS FOR DETERMINING THE CHANGING POSITION OF A MOBILE TRANSMITTER - A method and a device for determining the changing position of a mobile transmitter in a three-dimensional space is proposed in which transmitted signals are issued at a pre-determined frequency from a mobile transmitter, wherein a plurality of receivers receive said transmitted signals. An evaluation device evaluates the received signals for generating correlation curves between the transmitted and the received signals. From the curves of magnitude versus time, TOA values are determined, and from curves in the complex plane, phase values are determined using the time information from the TOA values. The position of the mobile transmitter is calculated as a function of TOA values and of phase or phase difference values. | 07-28-2011 |
20110179875 | METHOD FOR EVALUATING RECEIVED SIGNALS ACQUIRED DURING A NON-DESTRUCTIVE ULTRASONIC WAVE TEST, AND DEVICE FOR NON-DESTRUCTIVE ULTRASONIC WAVE TESTING OF A TEST BODY - A method and device are disclosed for evaluating received signals acquired during non-destructive ultrasonic testing of a test body, wherein ultrasound waves are generated inside the test body with an electromagnetic ultrasonic transducer acting as an ultrasound transmitter and ultrasound waves which propagate within the test body are converted into received signals with an electromagnetic ultrasonic transducer acting as an ultrasound receiver. The received signals are evaluated for the purpose of examining the test body. | 07-28-2011 |
20100320638 | DEVICE AND METHOD FOR PRODUCING CRYSTALLINE BODIES BY DIRECTIONAL SOLIDIFICATION - The invention relates to a device and a method for producing crystalline bodies by directional solidification. The device comprises a melting furnace ( | 12-23-2010 |
20100296151 | MICROSYSTEM AND METHOD FOR THE PRODUCTION OF A MICROSYSTEM - The invention relates to a microsystem having at least one micromirror ( | 11-25-2010 |
20100184457 | DEVICE FOR DETERMINING A DEVICE POSITION - A device for determining a device position, which includes a receiver for receiving signals of a plurality of transmitters and a determiner for determining reception powers of the signals of the plurality of transmitters. The device further includes a provider for providing transmitter positions of the transmitters on the basis of the signals of the plurality of transmitters. The device further includes a determiner for determining a first position of the device on the basis of the transmitter positions, wherein the determiner for determining the first position is further formed to determine transmitter directions on the basis of the first position and the transmitter positions, and to determine a second position of the device on the basis of the transmitter directions, the transmitter positions and the reception powers. | 07-22-2010 |
20100176102 | METHOD FOR MACHINING MATERIAL USING LASER RADIATION AND APPARATUS FOR CARRYING OUT THE METHOD - A method and device for machining material uses laser radiation, in which the unfocused laser radiation is focused through a focusing optics to a smaller beam cross section. The optical axis of the focused laser radiation, referred to as beam axis, is directed at the material surface. The beam waist, which results from the focusing operation, of the focused laser radiation is held in the region of the interface, which forms of laser radiation and material. The laser radiation is partially absorbed on the interface such that due to induced material removal or induced material displacement the interface and thus also the laser radiation penetrate into the material. The spacing of the beam waist from the upper or lower side of the interface in the axial direction corresponds at most to triple the value of the penetration depth of the interface into the material. The focusing operation is effected such that components of the laser radiation are made divergent not just in the propagation direction downstream of the beam waist but also in the beam waist and/or also in the propagation direction upstream of the beam waist and are thus directed away from the beam axis. These components and angles of divergence are larger than those of the effects of imaging errors, which are inadvertently produced using standard optics and are tolerated. | 07-15-2010 |
20100006426 | METHOD FOR DEPOSITING AN OXIDE LAYER ON ABSORBERS OF SOLAR CELLS - A method for depositing at least one stable, transparent and conductive layer system on chalcopyrite solar cell absorbers. The at least one stable, transparent and conductive layer system may be formed via ionizing PVD (physical vapor deposition) technology by using either high power pulsed magnetron sputtering (HPPMS) or high power impulse magnetron sputtering (HIPIMS). | 01-14-2010 |
20090213785 | System and Method for the Monitoring of Grouped Objects - A system and a method for monitoring grouped objects with a gateway and a plurality of radio nodes attachable to the objects. Each radio node has a computing unit, a short-range communications unit and an energy supply unit. One of the radio nodes or the gateway has a localization unit. Optionally, one of the radio nodes also has a long-range communications unit. The computing unit contains a control program for the processing of predetermined tasks in radio nodes, which is designed for the control of bi-directional communications between the radio nodes via the short-range communications unit for the formation of an ad hoc network. The control program undertakes the control of a tuning process between the radio nodes and selects one of the radio nodes for the processing of one of the predetermined tasks, the selected node at that instant being best suited for the task according to predetermined criteria. | 08-27-2009 |
20080314840 | Method For Separating Suspended Solid Materials From Aqueous Systems With Colloidal Flocculants - The invention relates to a method for separating suspended solid materials from aqueous systems, in which the latter is mixed with a flocculant made of polymer colloidal particles with cationic surface charge and subsequently the flocculated material is separated from the aqueous system. | 12-25-2008 |
20080311697 | Method For Simultaneous Recrystallization and Doping of Semiconductor Layers and Semiconductor Layer Systems Produced According to This Method - The invention relates to a method for simultaneous recrystallisation and doping of semiconductor layers, in particular for the production of crystalline silicon thin layer solar cells. In this method, in a first step a substrate base layer | 12-18-2008 |
20080221485 | Device and Method for Determining at Least One Characteristic Point of Joint to be Orthopedically Measured - The invention relates to a device for determining at least one characteristic point of a joint which joins together two limbs and is to be measured orthopedically, said device comprising a first coupling element which may be positioned on a first limb adjoining the joint, a second coupling element which may be moved relative to the first coupling element and may be positioned on a second limb adjoining the joint, and a measuring device for determining the position of the first coupling element relative to the second coupling element. This device provides that the measuring device has at least one reference point rigidly connected to one of the first and second coupling elements, and also has a reference point detection device rigidly connected to the respective other of the first and second coupling elements, the reference point detection device detecting a plurality of positions of the reference point relative to the reference point detection device during a movement of the first and second limbs with respect to one another and determining therefrom the at least one characteristic point. | 09-11-2008 |