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    • 3. 发明公开
    • VERFAHREN ZUM DETEKTIEREN VON ZIELECHOS IN EINEM EMPFANGSSIGNAL EINES ULTRASCHALLSENSORS EINES KRAFTFAHRZEUGS, ULTRASCHALLSENSOREINRICHTUNG UND KRAFTFAHRZEUG
    • 为了检测目标呼应了一个方法来接收信号的超声传感器的机动车辆,换能器装置和机动车辆
    • EP3084470A1
    • 2016-10-26
    • EP14802859.0
    • 2014-11-21
    • Valeo Schalter und Sensoren GmbH
    • HALLEK, MichaelJUNG, Thomas
    • G01S15/93G01S7/02G01S7/527G01S15/10G01S15/32G01S15/87
    • G01S15/931G01S7/023G01S7/527G01S15/104G01S15/325G01S15/876G01S2015/932
    • The invention relates to a method for detecting target echoes (11) in a received signal (ES) of an ultrasonic sensor of a motor vehicle, having the steps of providing a reference signal (RS) for decoding the received signal (ES), a correlation input signal (RS) being provided for a plurality of specified frequency shift values by shifting the frequency of the reference signal (RS) by the respective frequency shift value; separately correlating the received signal (ES) to each of the correlation input signals (RS) and thereby providing respective correlation output signals (KS1 to KS7) as the result of each correlation; and providing a composite signal (SS) as the sum of the correlation output signals (KS1 to KS7), wherein one of the correlation output signals (KS1 to KS7) is selected using the composite signal (SS), and the detection of the target echoes (11) is carried out by analyzing the selected correlation output signal (KS1 to KS7).
    • 本发明涉及一种用于通过对所述接收信号(ES)进行解码提供参考信号(RS),相对于worin到一个检测在接收信号中的机动车辆的超声波传感器的(ES)的目标回波(11) 在一个相关的输入信号(RS)是通过在由respectivement频移值其频率方面的参考信号(RS)移位提供每种情况下规定的频率移位值的多重性; 与每个相关的输入信号(RS)和由此提供respectivement相关输出信号(KS1到KS7),作为相关respectivement的结果的单独相关联的接收信号(ES); 和由作为相关输出信号(KS1到KS7)的总和信号(SS)的相关输出信号中的一个(KS1至KS7)的基础上worin的总和提供的和信号(SS)被选择并检测 目标回波(11)由所述选择的相关输出信号(KS1到KS7)评估开展。
    • 6. 发明公开
    • VERFAHREN ZUM BETRIEB EINES ULTRASCHALLWANDLERS
    • EP2880463A1
    • 2015-06-10
    • EP13742005.5
    • 2013-07-22
    • Robert Bosch GmbH
    • KIRCHNER, Tobias
    • G01S15/32G01S7/524
    • G01S7/524
    • The invention relates to a method for operating an ultrasonic converter (20) in which ultrasonic signals are emitted by the ultrasonic converter (20), and reflected ultrasonic echoes are received again by the ultrasonic converter (20), wherein the ultrasonic converter (20) is coupled in parallel to an oscillatory circuit (18), comprising the following steps: (a) exciting the oscillatory circuit (18) with a signal generator (12) which is connected in series to the oscillatory circuit (18), wherein the ultrasonic converter (20) is excited by means of the oscillatory circuit (18) and emits an ultrasonic signal, (b) damping the oscillation of the ultrasonic converter (20), (c) receiving the ultrasonic echo, wherein in order to damp the oscillation of the ultrasonic converter (20) according to step (b) the excitation of the oscillatory circuit (18) is ended with the signal generator (12), the signal generator is disconnected from the oscillatory circuit (20) for a defined time period t
      0 , and after the expiry of the time period t
      0 it is coupled to the oscillatory circuit (18) again, wherein the phase of the oscillation in the oscillatory circuit (20) is shifted with respect to the oscillation of the ultrasonic converter (20), and the phase-shifted oscillation of the oscillatory circuit (18) damps the oscillation of the ultrasonic converter (20). Furthermore, the invention relates to a device for operating an ultrasonic converter (20).
    • 本发明涉及一种操作超声波变换器(20)的方法,超声波转换器(20)发射超声波信号,超声波转换器(20)再次接收反射超声波回波,其中超声波转换器(20) 与振荡电路(18)并联耦合,包括以下步骤:(a)用与振荡电路(18)串联连接的信号发生器(12)激励振荡电路(18),其中超声波 转换器(20)通过振荡电路(18)激发并发射超声波信号,(b)阻尼超声波转换器(20)的振荡,(c)接收超声回波,其中为了抑制振荡 根据步骤(b)的超声波转换器(20)的振荡电路(18)的激励由信号发生器(12)结束,信号发生器与振荡电路(20)断开一定的时间段t0 ,a 在时间段t0期满后,再次耦合到振荡电路(18),其中振荡电路(20)中的振荡相位相对于超声波转换器(20)的振荡移位,以及 振荡电路(18)的相移振荡抑制超声波转换器(20)的振荡。 此外,本发明涉及一种用于操作超声波转换器(20)的装置。
    • 9. 发明公开
    • Distance measuring systems, altimeters and aircraft
    • Systeme zur Entfernungsmessung,Höhenmesserund Luftfahrzeuge
    • EP0969292A2
    • 2000-01-05
    • EP99305076.4
    • 1999-06-28
    • Subacoustech Limited
    • Nedwell, Jeremy Ross
    • G01S15/32G01S15/88G01S7/521
    • G01S15/104G01S15/06
    • A distance measuring system is described which may be used as an altimeter for a helicopter or for a load carried by its winch. The system comprises: a transmitting transducer (18) for converting a first modulated electrical signal into a corresponding acoustic signal to be directed towards and reflected by a surface (20); a receiving transducer (22) for converting the received reflected acoustic signal into a corresponding second electrical signal; and a correlation processor (17) for receiving the second electrical signal, or the first and second electrical signals, and correlating the modulations thereof to produce an indication of a time delay thereof from which the distance(≈2d) travelled by the acoustic signal can be determined.
      The frequency of the acoustic signal is preferably chosen so that it is not at or near the fundamental resonant frequency of either transducer and so that it satisfies at least one of the following conditions: at or near a higher-order resonant frequency of one or both of the transducers; at a frequency at which a frequency-dependent directivity index of the transducers is relatively high; at a frequency at which the ambient acoustic noise level is relatively low; and at a frequency at which the acoustic reflection loss at the surface is relatively low. The transducers are preferably mounted adjacent each other, with an acoustically absorbent material (32) between them, and by respective mounting systems (42,44) to a common member (36), with each mounting system providing acoustic damping and isolation between its transducer and the common member. The correlation processor is preferably arranged so that it does not attempt to correlate the electrical signals in respect of a time delay which is less than or generally equal to the time taken for the acoustic signal to travel directly between the transducers. The first electrical signal is preferably modulated by an M-sequence. An altitude-related aspect of the helicopter may be controlled in dependence upon the indicated time delay.
    • 描述了一种距离测量系统,其可以用作直升机的高度计或其绞盘承载的负载。 该系统包括:发射换能器(18),用于将第一调制电信号转换成相对应的声信号以被指向并由表面(20)反射; 接收换能器(22),用于将所接收的反射声信号转换成对应的第二电信号; 以及相关处理器(17),用于接收第二电信号或第一和第二电信号,并使其调制相关,以产生其时间延迟的指示,由声信号行进的距离(APPROX 2d) 确定。 声信号的频率优选地被选择为使得它不在任何一个换能器的基本共振频率处或其附近,并且使得其满足以下条件中的至少一个:在一个或两个的一个或两个的高次谐振频率处或附近 的传感器; 在换能器的频率相关指向性指数相对较高的频率处; 在环境噪声水平相对较低的频率下; 并且在表面处的声反射损失相对较低的频率处。 传感器优选地彼此相邻地安装,在它们之间具有吸声材料(32),并且通过相应的安装系统(42,44)安装到公共构件(36),每个安装系统在其换能器之间提供声学阻尼和隔离 和普通会员。 相关处理器优选地被布置成使得它不试图关于小于或大体上等于声信号直接在换能器之间行进的时间的时间延迟的电信号。 第一电信号优选由M序列调制。 可以根据指示的时间延迟来控制直升机的高度相关方面。