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    • 1. 发明申请
    • ULTRASONIC MEASURING SYSTEM HAVING A REDUCED MINIMUM RANGE AND METHOD FOR DETECTING AN OBSTACLE
    • 具有减少最小范围的超声波测量系统和用于检测障碍物的方法
    • US20140331772A1
    • 2014-11-13
    • US14117128
    • 2012-03-20
    • Albrecht KlotzDirk SchmidMichael SchumannMatthias Karl
    • Albrecht KlotzDirk SchmidMichael SchumannMatthias Karl
    • G01B17/00G01V1/00
    • G01B17/00G01S7/527G01S7/529G01S7/5345G01S15/931G01V1/00
    • An ultrasonic measuring system is described for detecting an obstacle using a resonant transducer element for transmitting an ultrasonic pulse and for generating a received signal which includes the ultrasonic echo pulse reflected from the obstacle, the transducer element generating a decay signal having its resonance frequency after transmitting an ultrasonic pulse. The ultrasonic measuring system includes an evaluation unit having a control unit which is designed to activate the transducer element for transmitting the ultrasonic pulse with the aid of a frequency-modulated transmitted signal generated by the control unit, the frequency modulation taking place with the aid of a modulation signal in such a way that the to signature of the ultrasonic pulse differs from that of the decay signal. The evaluation unit is designed to recognize the echo pulse based on an evaluation of a correlation signal which is generated with the aid of at least one correlation filter and which originates from the correlation of the signal generated by the resonant transducer element with the transmitted signal. Furthermore, a corresponding method is provided for detecting an obstacle with the aid of ultrasound, as well as a vehicle assistance system having the ultrasonic measuring system.
    • 描述了一种超声波测量系统,用于使用用于发送超声波脉冲的谐振换能器元件来检测障碍物,并且用于生成包括从障碍物反射的超声波回波脉冲的接收信号,所述换能器元件在发送之后产生其谐振频率的衰减信号 超声波脉冲。 所述超声波测量系统包括评估单元,所述评估单元具有控制单元,所述控制单元被设计成借助于由所述控制单元生成的经调频的发送信号来激活用于发送所述超声波脉冲的所述换能器元件,所述调频发生在借助于 调制信号使得超声脉冲的签名与衰减信号的签名不同。 评估单元被设计为基于通过至少一个相关滤波器产生的相关信号的评估来识别回波脉冲,并且其起源于由谐振换能器元件产生的信号与发射信号的相关性。 此外,提供了借助于超声检测障碍物的相应方法,以及具有超声波测量系统的车辆辅助系统。