发明授权
- 专利标题: Magnetomechanical transducers utilizing resonant frequency shifts to measure displacement of an object
- 专利标题(中): 利用谐振频率偏移来测量物体的位移的磁力机械传感器
-
申请号: US548815申请日: 1983-11-04
-
公开(公告)号: US4710709A公开(公告)日: 1987-12-01
- 发明人: Philip M. Anderson, III , Jeffrey C. Urbanski
- 申请人: Philip M. Anderson, III , Jeffrey C. Urbanski
- 申请人地址: NJ Morris Township, Morris County
- 专利权人: Allied Corporation
- 当前专利权人: Allied Corporation
- 当前专利权人地址: NJ Morris Township, Morris County
- 主分类号: G01D5/14
- IPC分类号: G01D5/14 ; G01D5/243 ; G01L9/00 ; G01P3/481 ; G01B7/14 ; G01R33/00
摘要:
A target adapted for use in a magnetomechanical transducer system is activated by an ac magnetic field and a variable dc bias field to produce a resonant frequency which corresponds to the effective strength of the dc bias field. The target includes an elongated ductile strip of magnetostrictive ferromagnetic material enclosed in a nonmagnetic container in a manner to allow the strip to vibrate freely. The strip has a magnetomechanical coupling factor, k.sub.1 greater than O, where k=(1-fr.sup.2 /fa.sup.2)1/2, fr and fa being the resonant and antiresonant frequencies, respectfully. The system is economical to construct and affords accurate and efficient measurement of displacements and angles at locations proximate to or remote from the signal source (target).
公开/授权文献
- US5747722A Detonators having multiple-line input leads 公开/授权日:1998-05-05