Abstract:
A vehicular run controller performs vehicular run control on the basis of vehicular velocity and the vehicular running environment (e.g. distance from a preceding vehicle). The controller has at least two control modes, i.e. a control wait mode and a vehicular run mode. The controller falls in the state of vehicular run control when a start of vehicular run control is set through a setter, falls in a halt state of vehicular run control when release of vehicular run control is set through the setter, carries out a mode transition from one control mode to another control mode when the mode transition through an instructor according to a driver's will and when a predetermined condition is established during vehicular run control irrespective of the driver's will, and informs the driver through an informing device (such as an alarm unit) of the occurrence of a mode transition. Preferably, the driver is only informed of a mode transition in circumstances in which the driver would not otherwise appreciate that a mode transition had occurred.
Abstract:
A radar detection process includes computing a derivative of an FFT output signal to detect an object within a specified detection zone. In one embodiment, a zero crossing in the second derivative of the FFT output signal indicates the presence of an object. The range of the object is determined as a function of the frequency at which the zero crossing occurs. Also described is a detection table containing indicators of the presence or absence of an object within a respective radar beam and processing cycle. At least two such indicators are combined in order to detect the presence of an object within the detection zone and with changing range gates in each of the antenna beams the coverage of the detection zone can be varied.
Abstract:
A near object detection (NOD) system includes a plurality of sensors, each of the sensors for providing detection coverage in a predetermined coverage zone. Each of the sensors includes a transmit antenna for transmitting a first RF signal, a receive antenna for receiving a second RF signal and a means for sharing the target data between each of the plurality of sensors in the NOD system.
Abstract:
A near object detection (NOD) system includes a plurality of sensors, each of the sensors for providing detection coverage in a predetermined coverage zone and each of the sensors including a transmit antenna for transmitting a first RF signal, a receive antenna for receiving a second RF signal and means for sharing information between each of the plurality of sensors in the NOD system.
Abstract:
A video amplifier for a radar receiver includes a temperature compensating attenuator. The attenuator includes a temperature sensitive device, such as a thermistor, arranged in a voltage divider network and is coupled in cascade between two filter stages. Each of the filter stages has a bandpass characteristic in order to filter low-frequency leakage signals and provide sensitivity control based on frequency and thus range, while also filtering high frequency signals to reduce aliasing.
Abstract:
Die erfindungsgemässe Vorrichtung betrifft eine Vorrichtung zur Bewertung und/oder Beeinflussung einer Fahrzeugbewegungsgrösse und/oder des Fahrzeugbewegungsverhaltens. Hierzuweist die Vorrichtung folgende Mittel auf: Bedienungsmittel (10) mit denen der Fahrer Vorgabegrössen (VG) zur Beeinflussung wenigstens einer Fahrzeugbewegungsgrösse erzeugen kann. Bewertungsmittel (42, 44, 46, 48), mit denen das Verhalten einer Fahrzeugbewegungsgröss bzgl. eines vorgegebenen Wertes bewertet wird, und/oder mit denen in Abhängigkeit von Fahrzeugbewegungsgrössen und/oder von Grössen, die die Fahrzeugumgebung repräsentieren, das Fahrzeugbewegungsverhalten bzgl. eines vordefinierten Fahrzeugbewegungsverhaltens bewertet wird. Diese Bewertungsmittel (42, 44, 46, 48) sind in mindestens zwei unterschiedlichen Betriebszuständen betreibbar, wobei in einem ersten Betriebszustand dem Fahrer in Abhängigkeit des Ergebnis der durchgeführten Bewertung lediglich eine Information (OHAx) über das Verhalten der Fahrzeugbewegungsgrîsse und/íber das Fahrzeugbewegungsverhalten bereitgestellt wird, und in einem zweiten Betriebszustand in Abhängigkeit des Ergebnis der durchgeführten Bewertung Ausgabesignale (AGSx) zur fahrerunabhängigen Beeinflussung einer Fahrzeugbewegungsgrösse und/oder des Fahrzeugbewegungsverhaltens ermittelt werden. Ferner weist die Vorrichtung Beeinflussungsmittel (40) auf, mittels derer der Fahrer die Bewertungsmittel (42, 44, 46, 48) zwischen den wenigstens zwei Betriebszuständen umschalten kann. Auch sind Verarbeitungsmittel /12, 14, 16, 18, 20, 22) vorgesehen, mit denen ausgehend von den vom Fahrer erzeugten Vorgabegrössen (VG) und/oder, sofern die Bewertungsmittel (42, 44, 46, 48) im zweiten Betriebszustand betrieben werden, der Ausgabesignale (AGSx) Ansteuersignale (ASSx) zur Ansteuerung von im Fahrzeug angeordneten Aktuatoren (26, 28, 30) erzeugt werden. Durch die Ansteuerung der Aktuatoren (26, 28, 30) wird die Fahrzeugbewegungsgrösse und/oder das Fahrzeugbewegungsverhalten beeinflusst.
Abstract:
A multiple beam array antenna system comprises a plurality of radiating elements provided from stripline-fed open-ended waveguide coupled to a Butler matrix beam forming network. The Butler matrix beam forming network is coupled to a switched beam combining circuit. The antenna can be fabricated as a single Low Temperature Co-fired Ceramic (LTCC) circuit.
Abstract:
In accordance with the present invention, an adaptive cruise control system includes a radio frequency (RF) transmit receive (TR) sensor module (or more simply "sensor") disposed such that a detection zone is deployed in front of a vehicle. The sensor includes a sensor antenna system which comprises a transmit antenna for emitting or transmitting an RF signal and a receive antenna for receiving portions of the transmitted RF signal which are intercepted by one or more objects within a field of view of the transmit antenna and reflected back toward the receive antenna.
Abstract:
A radar detection process includes computing a derivative of an FFT output signal to detect an object within a specified detection zone. In one embodiment, a zero crossing in the second derivative of the FFT output signal indicates the presence of an object. The range of the object is determined as a function of the frequency at which the zero crossing occurs. Also described is a detection table containing indicators of the presence or absence of an object within a respective radar beam and processing cycle. At least two such indicators are combined in order to detect the presence of an object within the detection zone and with changing range gates in each of the antenna beams the coverage of the detection zone can be varied.
Abstract:
A radar system includes a transmit antenna for transmitting a first RF signal, a receive antenna for receiving a second RF signal, and a receiver circuit coupled to the receive antenna for processing the second RF signal and comprising a video amplifier having a temperature compensating attenuator. A radar receiver includes an RF amplifier, a down-converter and a video amplifier comprising a temperature compensating attenuator. The RF amplifier has an input terminal adapted to receive an RF signal and an output terminal at which an amplified RF signal is provided. The down-converter has an input terminal coupled to the output terminal of the RF amplifier and an output terminal at which a lower frequency signal is provided. The video amplifier has an input terminal coupled to the output terminal of the down-converter and an output terminal at which a filtered signal is provided.