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1. 发明授权

US4678993A Distance measuring device operating with torsional ultrasonic waves detected without mode conversion 失效
标题翻译：使用扭转超声波操作的距离测量装置，无模式转换
公开(公告)号：US4678993A
公开(公告)日：1987-07-07
申请号：US673473
申请日：1984-11-20
申请人： Antonius Vinnemann , Veit Koninger
发明人： Antonius Vinnemann , Veit Koninger
IPC分类号： G01B17/00 , G01B17/02 , G01B7/14 , H03H9/00 , H04B11/00
CPC分类号： G01B17/02
摘要： The invention relates to an ultrasonic distance measuring device for linear distance measurement comprising a tube of magnetostrictive material, a magnet displaceable relative to the tube for generating torsional ultrasonic pulses as a function of electrical pulses produced by a pulse generator and travelling along the tube, these torsional ultrasonic pulses serving as position signals, and also comprising an ultrasonic receiver coupled to the tube for converting ultrasonic pulses generated in the tube into electrical signals and a measuring circuit for ascertaining the position of the movable magent as a function of the time interval between the signals obtained from the position signals and at least one respective reference signal generated by the presence of an electrical pulse. In accordance with the invention, the ultrasonic receiver for direct detection of torsional pulses is provided as a section of the tube which is circumferentially magnetized on the basis of remanence and a coil surrounding this section in axial direction.
摘要翻译：本发明涉及一种用于线性距离测量的超声波距离测量装置，包括一个磁致伸缩材料管，相对于管可移位的磁体，用于产生作为脉冲发生器产生的电脉冲并沿管行进的电脉冲的函数的扭转超声脉冲，扭转超声波脉冲用作位置信号，并且还包括耦合到管的超声波接收器，用于将在管中产生的超声波脉冲转换成电信号;以及测量电路，用于确定可动磁场的位置，作为时间间隔的函数从位置信号获得的信号和由存在电脉冲产生的至少一个相应参考信号。根据本发明，用于直接检测扭转脉冲的超声波接收器被设置为基于剩磁的周向磁化的管的一部分，以及围绕该部分的轴向的线圈。

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