公开(公告)号：US4245261A

公开(公告)日：1981-01-13

申请号：US852136

申请日：1977-11-16

申请人： Jack W. Shilling ,  Jeffrey A. Dierker ,  Chester A. Mitchell

发明人： Jack W. Shilling ,  Jeffrey A. Dierker ,  Chester A. Mitchell

IPC分类号： G01D5/245 ,  G01D5/12 ,  G01D5/249 ,  H03M1/00 ,  G11B5/86 ,  G11B5/78

CPC分类号： G01D5/2497 ,  G01D5/12 ,  H03M1/26

摘要： A digital displacement transducer to provide a digital output linear related to the displacement of a reference surface of an object. An eight track tape unit is coded with information related to displacements of 1/256 of an inch and applied to the reference surface. Means are then provided to assume the coded information of the tape unit; the means are of lesser coercivity than the tape unit. The information means is pulsed so that the information contained is the same, and a read out head is provided to read out which information was shifted, and thereby indicate the position of the reference surface of the object. A method is also provided to encode the information in the information means, switch the information therein, and obtain a read out.

摘要翻译： 数字位移传感器，用于提供与物体的参考表面的位移有关的数字输出。 八轨道磁带单元用与1/256英寸的位移相关的信息编码并施加到参考表面。 然后提供装置以呈现带单元的编码信息; 该装置的矫顽力比带单元小。 信息装置被脉冲，使得包含的信息相同，并且提供读出头以读出哪个信息被移位，从而指示对象的参考表面的位置。 还提供了一种对信息装置中的信息进行编码的方法，在其中切换信息并获得读出。

公开(公告)号：USD254536S

公开(公告)日：1980-03-25

申请号：US852177

申请日：1977-11-16

申请人： Wesley B. Davis ,  Jeffrey A. Dierker

设计人： Wesley B. Davis ,  Jeffrey A. Dierker

公开(公告)号：US4059798A

公开(公告)日：1977-11-22

申请号：US664716

申请日：1976-03-08

申请人： Jeffrey A. Dierker ,  Prentice G. Moore

发明人： Jeffrey A. Dierker ,  Prentice G. Moore

IPC分类号： G01R1/22 ,  G01R1/20 ,  G01R15/20 ,  G01R33/025 ,  G01R33/12 ,  G01R33/00

CPC分类号： G01R1/22 ,  G01R15/202 ,  G01R33/025

摘要： Magnetic cores of clamp-on type current measuring devices having a Hall-effect device for measurement of D.C. currents are provided with stabilizing coils which are periodically energized to substantially eliminate the characteristic hysteresis effect of the core material. A magnetic core of the type which is split to permit opening and subsequent clamping onto a conductor, has one section thereof provided with an air gap in which the Hall-effect device is positioned. A stabilizing coil is positioned on one section of the magnetic core and the coil and is periodically energized with a damped oscillatory current. This damped oscillatory current is at least applied immediately prior to the taking of any current measurement and is preferably applied periodically to maintain the stability of the magnetic core.

摘要翻译： 具有用于测量直流电流的霍尔效应装置的钳位型电流测量装置的磁芯设置有周期性通电的稳定线圈，以基本上消除芯材料的特征滞后效应。 被分割以允许打开和随后夹紧在导体上的类型的磁芯具有一个部分，其设置有气隙，霍尔效应装置定位在该气隙中。 稳定线圈定位在磁芯和线圈的一个部分上，并且用阻尼振荡电流周期性地通电。 该阻尼振荡电流至少在采取任何电流测量之前立即应用，并且优选周期性地施加以保持磁芯的稳定性。