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.
Abstract:
The invention relates to a device for evaluating and/or influencing a motion variable and/or motion behavior of a vehicle. The device has the following means: operating means (10) which can be used by the driver to generate preset variables (VG) in order to influence at least one motion variable of the vehicle; assessment means (42, 44, 46, 48) which assess the behavior of a motion variable of the vehicle relative to a preset value and/or which are used to assess the motion behavior of a vehicle relative to a predefined motion behavior of the vehicle depending on motion variables of the vehicle and/or variables representing the surroundings of the vehicle. Said assessment means (42, 44, 46, 48) can be operated in at least two different operating states. In the first operating state, the driver is only provided with information (OHAx) on the behavior of the motion variable of the vehicle and/or on the motion behavior of the vehicle depending on the results of the assessment that was carried out. In a second operating state, output signals (AGSx) pertaining to driver-independent influencing of a motion variable of the vehicle and/or the motion behavior of the vehicle are detected depending on the results of the assessment that was carried out. The device also has influencing means (40), which can be used by the driver in order to switch the assessment means (42, 44, 46, 48) between the at least two operating states. Processing means (12, 14, 16, 18, 20, 22) are further provided, said processing means being used to generate control signals (ASSx) for controlling the actuators (26, 28, 30) that are arranged in the vehicle, using as starting points the preset variables (VG) generated by the driver and/or the output signals (AGSx) provided that the assessment means (42, 44, 46, 48) are operating in the second operating state. The motion variable and/or motion behavior of the vehicle are influenced by controlling the actuators (26, 28, 30).
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:
PROBLEM TO BE SOLVED: To surely generate a yaw moment necessary for preventing lane deviation. SOLUTION: When a selection flag F LSD is 1, this lane deviation preventing device applies a target yaw moment to a vehicle according to the driving force difference of right and left driving wheels for preventing deviation (steps S14 to S16), and when the selection flag F LSD is 2, the lane deviation preventing device applies a braking force to the driving force difference of the right and left driving wheels and a preliminarily selected braking wheel (a step S8), and applies the target yaw moment to the vehicle according to the braking force difference of the right and left wheels for preventing deviation (steps S17 to S19), and when the selection flag F LSD is 0, the lane deviation preventing device applies the target yaw moment to the vehicle according to the braking force difference of the right and left wheels for preventing deviation (steps S20 and S21). COPYRIGHT: (C)2006,JPO&NCIPI
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.
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.