公开(公告)号：EP1324069B1

公开(公告)日：2009-09-02

申请号：EP01830801.5

申请日：2001-12-21

Applicant: STMicroelectronics S.r.l.

Inventor： Fortuna, Luigi ,  Rizzo, Alessandro ,  Frasca, Mattia ,  Branciforte, Marco ,  Bartolone, Marco

IPC: G01S15/10 ,  G01S7/523 ,  G01S7/537

CPC classification number: G01S7/523 ,  G01S7/537 ,  G01S15/102 ,  G01S15/931

公开(公告)号：EP1324069A1

公开(公告)日：2003-07-02

申请号：EP01830801.5

申请日：2001-12-21

Applicant: STMicroelectronics S.r.l.

Inventor： Fortuna, Luigi ,  Rizzo, Alessandro ,  Frasca, Mattia ,  Branciforti, Marco ,  Bartolone, Marco

IPC: G01S15/10 ,  G01S7/523 ,  G01S7/537

CPC classification number: G01S7/523 ,  G01S7/537 ,  G01S15/102 ,  G01S15/931

Abstract: A system for detecting distances, usable, for instance, in the vehicle sector or in robotics applications, comprises at least one transducer (16), such as a piezoelectric transducer, for generating a transmission signal to be sent in the direction of an obstacle (O) and for obtaining a receiving signal corresponding to an echo produced by the reflection of said transmission signal off the obstacle (O). The transducer (16) is driven by a chaos generator (10), such as a Chua's circuit (10). The system preferably comprises a correlator (18) for correlating the transmission signal (TX) and the receiving signal (RX) so that the distance between the obstacle and the transducer (16) is identified by the instant at which the aforesaid correlation assumes the maximum value. Preferably, the transmission signal (TX) is a square-wave signal selectively generated with one first frequency and one second frequency, the jumps between said two frequencies being determined by the instants of emission of the pulses (CPPM) generated by a pulse generator of an analog type (12) driven by the chaos generator (10).

Abstract translation: 用于检测距离的系统，例如可用于车辆部分或机器人应用中的系统包括至少一个换能器（例如压电换能器），用于产生沿障碍物的方向发送的发送信号（ O）并且用于获得对应于由所述发射信号从所述障碍物（O）的反射产生的回波的接收信号。 换能器（16）由混沌发生器（10）驱动，诸如蔡氏电路（10）。 系统优选地包括用于使发射信号（TX）和接收信号（RX）相关联的相关器（18），使得障碍物和换能器（16）之间的距离由上述相关性假设为最大值 值。 优选地，传输信号（TX）是以一个第一频率和一个第二频率选择性地产生的方波信号，所述两个频率之间的跳跃由由脉冲发生器产生的脉冲发生时间（CPPM）确定， 由混沌发生器（10）驱动的模拟类型（12）。