The invention relates to a lighting device for a vehicle having a laser-based light source unit f... more The invention relates to a lighting device for a vehicle having a laser-based light source unit for emitting laser light at a predetermined angle and with an optical unit for generating a light distribution in which a sub-beam deflecting device is provided by which a main beam is routable in a main beam direction to produce the light distribution and by means of which a partial beam from a beam path of the main beam at an angle to the chief ray of a position of the partial beam detecting sensor can be fed to be deflected, so that depending on the detected position of the partial beam a change of the radiation angle of the main beam can be determined.
Die Erfindung betrifft ein Verfahren zum Bestimmen eines Volumens eines Nutzmediums in einem mit ... more Die Erfindung betrifft ein Verfahren zum Bestimmen eines Volumens eines Nutzmediums in einem mit dem Nutzmedium und mit einem Fullmedium befullten Vorratsbehalter umfassend die folgenden Schritte: ein Volumen des Fullmediums wird dynamisch variiert; eine infolge der Volumenanderung erzeugte Druckschwankung in dem Fullmedium wird erfasst; aus der Volumenanderung und der Druckschwankung wird ein Grundvolumen des Fullmediums bestimmt; und aus einem bekannten Behaltervolumen und dem Grundvolumen des Fullmediums wird das Volumen des Nutzmediums bestimmt.
The invention relates to a device for leak diagnosis of a tank system with a pump (5) for establi... more The invention relates to a device for leak diagnosis of a tank system with a pump (5) for establishing an overpressure in the tank system, wherein the pump (5) on the suction side by means of a suction line (3) to fresh air and pressure side by means of a pressure line (2) via a device for Intermediate storage of fuel vapors or of hydrocarbons is connected to a tank, a pressure sensor (6) which is arranged on the pressure line (2) between the pump (5) and the means for intermediate storage, a bypass line (4) between the pressure line (2) and the fresh air, wherein in the bypass line (4) a switchable valve (7) is arranged, and means for driving and evaluating. The device (1) should be cheap to manufacture and easy to operate. In particular, an associated pressure sensor should be usable in a standard design, so that costs can be saved for this purpose. For this purpose, it is proposed that a first check valve (8) be arranged in the pressure line (2) between the pressure sensor (6) an...
Electron spin resonance (ESR) of volume-limited samples or nanostructured materials can be made s... more Electron spin resonance (ESR) of volume-limited samples or nanostructured materials can be made significantly more efficient by using microresonators whose size matches that of the structures under investigation. We describe a series of planar microresonators that show large improvements over conventional ESR resonators in terms of microwave conversion efficiency (microwave field strength for a given input power) and sensitivity (minimum number of detectable spins). We explore the dependence of these parameters on the size of the resonator and find that both scale almost linearly with the inverse of the resonator size. Scaling down the loops of the planar microresonators from 500 down to 20 μm improves the microwave efficiency and the sensitivity of these structures by more than an order of magnitude and reduces the microwave power requirements by more than two orders of magnitude.
The invention relates to a lighting device for a vehicle having a laser-based light source unit f... more The invention relates to a lighting device for a vehicle having a laser-based light source unit for emitting laser light at a predetermined angle and with an optical unit for generating a light distribution in which a sub-beam deflecting device is provided by which a main beam is routable in a main beam direction to produce the light distribution and by means of which a partial beam from a beam path of the main beam at an angle to the chief ray of a position of the partial beam detecting sensor can be fed to be deflected, so that depending on the detected position of the partial beam a change of the radiation angle of the main beam can be determined.
Die Erfindung betrifft ein Verfahren zum Bestimmen eines Volumens eines Nutzmediums in einem mit ... more Die Erfindung betrifft ein Verfahren zum Bestimmen eines Volumens eines Nutzmediums in einem mit dem Nutzmedium und mit einem Fullmedium befullten Vorratsbehalter umfassend die folgenden Schritte: ein Volumen des Fullmediums wird dynamisch variiert; eine infolge der Volumenanderung erzeugte Druckschwankung in dem Fullmedium wird erfasst; aus der Volumenanderung und der Druckschwankung wird ein Grundvolumen des Fullmediums bestimmt; und aus einem bekannten Behaltervolumen und dem Grundvolumen des Fullmediums wird das Volumen des Nutzmediums bestimmt.
The invention relates to a device for leak diagnosis of a tank system with a pump (5) for establi... more The invention relates to a device for leak diagnosis of a tank system with a pump (5) for establishing an overpressure in the tank system, wherein the pump (5) on the suction side by means of a suction line (3) to fresh air and pressure side by means of a pressure line (2) via a device for Intermediate storage of fuel vapors or of hydrocarbons is connected to a tank, a pressure sensor (6) which is arranged on the pressure line (2) between the pump (5) and the means for intermediate storage, a bypass line (4) between the pressure line (2) and the fresh air, wherein in the bypass line (4) a switchable valve (7) is arranged, and means for driving and evaluating. The device (1) should be cheap to manufacture and easy to operate. In particular, an associated pressure sensor should be usable in a standard design, so that costs can be saved for this purpose. For this purpose, it is proposed that a first check valve (8) be arranged in the pressure line (2) between the pressure sensor (6) an...
Electron spin resonance (ESR) of volume-limited samples or nanostructured materials can be made s... more Electron spin resonance (ESR) of volume-limited samples or nanostructured materials can be made significantly more efficient by using microresonators whose size matches that of the structures under investigation. We describe a series of planar microresonators that show large improvements over conventional ESR resonators in terms of microwave conversion efficiency (microwave field strength for a given input power) and sensitivity (minimum number of detectable spins). We explore the dependence of these parameters on the size of the resonator and find that both scale almost linearly with the inverse of the resonator size. Scaling down the loops of the planar microresonators from 500 down to 20 μm improves the microwave efficiency and the sensitivity of these structures by more than an order of magnitude and reduces the microwave power requirements by more than two orders of magnitude.
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Papers by Ingo Niemeyer