ENVIRONMENT MONITORING DEVICE IN A MOTOR VEHICLE AND METHOD FOR MONITORING THE ENVIRONMENT USING A CORRELATION

摘要

The present invention relates to an environmental monitoring device (30) in a vehicle (47), said environmental monitoring device comprising a signal generating device (34) for generating a transmission signal, a conversion device for converting the electrical vibration into acoustic vibration and / And an evaluation device for evaluating an electrical received signal to determine the distance between the at least one ultrasonic transducer 1 and the objects 39 in the environment 31 of the vehicle 47, The ultrasound transducer 1 emits an ultrasound transmission signal into the environment corresponding to the electrical transmission signal and the evaluation device is connected to the at least one ultrasonic transducer 1 and the ultrasound transducer 1, Connected to or connected to at least one other ultrasonic transducer 1, an electrical received signal may be received, wherein the electrical received signal is transmitted from the reflected ultrasonic transmit signal to the at least one ultrasonic transducer 1, Since at least one ultrasound transducer 1 and optionally at least one other ultrasound transducer 1 are arranged in the vehicle, the at least one ultrasound transducer 1 is derived from at least one other ultrasound transducer 1, The physically formed closed surface of the vehicle component, in particular the wall 2 of the bumper 3, between the transducer 1 and, optionally, at least one other ultrasonic transducer 1 and the environment of the vehicle 47 to be monitored, Wherein at least one of the at least one ultrasonic transducer 1 or at least one other ultrasonic transducer 1 is materially associated with the wall and the evaluating device 48 comprises a correlating unit 44), and the correlation unit is configured to form a cross-correlation between the received signal and the transmitted signal and also to determine the distance from the objects 39 in the environment 31 by the calculated correlation signal in correlation The present invention also relates to a method for environmental monitoring using cross-correlation.;