摘要:
A locating system is equipped with energy saving means which put mobile transmission devices 9 in an energy saving mode if the latter have not moved for a period of time and activate them again when they have. These energy saving means are formed, on the one hand, by RF signal receivers 17 which form part of the mobile devices 9 and, on the other hand, by RF signal transmitters 15 which form part of stationary devices 5. The RF signal receivers 17 are coupled to a processing unit 19 which activates the mobile devices 9 if it notices a change in the signal strength of the received RF signals.
摘要:
La présente invention concerne un système et un procédé d'aide à l'appontage d'un aéronef (100) sur une plate-forme (102), plus particulièrement sur une plate-forme mobile comportant une surface d'appontage, ledit aéronef comprenant un émetteur de signaux (100a), le système étant caractérisé en ce qu 'il comprend des moyens (603) de détermination des commandes de vol à exécuter par l'aéronef, lesdits moyens étant au moins alimentés par des moyens (601) de localisation de l'aéronef et par des moyens (602) de prédiction des mouvements de la plate-forme, les moyens de localisation comprenant au moins deux senseurs passifs espacés, fixés à proximité de la surface d'appontage et aptes à recevoir les signaux émis par l'aéronef. L'invention s'applique notamment à l'appontage d'appareils à voilures tournantes et d'aéronefs autonomes sur des navires.
摘要:
A driver assistance system comprises a plurality of distance sensors (1, 2, 3, 4, 5, 6, 7, 8, 9, 10), particularly ultrasound sensors, which are spatially distributed and communicate via a data bus (12) with each other. The sensors are of identical design and can initialize themselves by way of the method according to the invention without a control device and can synchronize the distance measurement among each other. The overall result of a measurement of the sensors is transmitted to an output unit (14) and displayed to the driver.
摘要:
Methods and systems for analyzing or mapping portions of the radio frequency spectrum are provided. In one embodiment of the invention, a communication method is provided, with a first step of the method including receiving an electromagnetic energy from a portion of a radio frequency spectrum. The received energy is then sampled in the time domain, and subsequently converted into the frequency domain. The sampled energy, that is now in the frequency domain is analyzed, and at least one communication parameter is selected based on the analysis of the sampled energy. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the subject matter of the disclosure contained herein. This Abstract is submitted with the explicit understanding that it will not be used to interpret or to limit the scope or the meaning of claims.
摘要:
A method and a system of triangulating an objet by means of at least two sensors. Each sensor is placed in a respective local reference system. Each of the at least two sensors at least provide a bearing to the object in their respective local reference system. According to the invention a triangulation reference system is created. The triangulation reference system is different to any one of the local reference systems and suitably such that at leasttwo local reference systems are rotated more in relation to each other than_eachone is in relation to the triangulation reference system. Sensor positions and bearings are transformed into the triangulation reference system where the triangulation is performed. Suitably the triangulated position is then transformed into a desired reference system.
摘要:
Methods to improve the performance of passive coherent location by non-reliance on a direct view of the signal source (10, 20, 30) are described. Passive Coherent Location, or PCL, has become a promising technology as more computer-processing power has become generally available. Basically, most PCL techniques rely on comparing signal sources with their reflections from an object (100) in order to determine the location of the object (100). However, this requires line of sight access from the receiver system (150) to the signal source (10, 20, 30) which may not always be practical and may limit the performance of the system overall. The techniques described herein do not require line of sight to the transmitter sources (10, 20, 30).