×

Transducer which determines a position of an object by modifying differential pulses

  • US 5,070,737 A
  • Filed: 02/26/1990
  • Issued: 12/10/1991
  • Est. Priority Date: 02/10/1989
  • Status: Expired due to Fees
First Claim
Patent Images

1. A transducer comprisinga magnetostrictive member comprising at least one elongated strip or wire which, in operation, acts as an acoustic delay line and is sensitive to changes in magnetic flux,two parallel conductors,means for generating current pulses in the conductors, the conductors being positioned sufficiently close to the magnetostrictive member to cause an acoustic pulse to be launched in the magnetostrictive member each time one of the said current pulses is generated,modifier means for varying the amplitudes of the acoustic pulses in dependence upon conditions at the modifier means, anddetector means for deriving electrical output signals having values dependent on the amplitudes of the acoustic pulses,the two conductors being located on either side of the elongated strip or wire parallel to one another and at a substantial angle to the strip or wire in positions where each conductor, when carrying current pulses, has an equal but opposite magnetic effect on the delay line at a datum position of the modifier means.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×