초록 ▼

A Wiegand wire module is excited by a non-uniform field, which may vary in time either symmetrically or asymmetrically, to provide a switch in state of the Wiegand wire thereby inducing a pulse in the pickup coil of the module. The non-uniform field has a maximum value in an axial direction at a cen

A Wiegand wire module is excited by a non-uniform field, which may vary in time either symmetrically or asymmetrically, to provide a switch in state of the Wiegand wire thereby inducing a pulse in the pickup coil of the module. The non-uniform field has a maximum value in an axial direction at a center portion of the wire and a minimum value in an axial direction at end portions of the wire. As the amplitude of the field is varied to switch the wire, the end portions of the wire remain in a field having a low axial magnitude. The result is an output pulse substantially greater than obtained through symmetric exitation using a uniform field.

대표청구항 ▼

A pulser for use in the generation of a pulse in response to a changing magnetic field comprising: a Wiegand wire, means to establish a magnetic field external of said wire, means to couple said field to a central portion of said Wiegand wire, means to vary the magnitude of the field coupled to the

A pulser for use in the generation of a pulse in response to a changing magnetic field comprising: a Wiegand wire, means to establish a magnetic field external of said wire, means to couple said field to a central portion of said Wiegand wire, means to vary the magnitude of the field coupled to the said central portion of said Wiegand wire sufficiently to cause a change of state of said wire as said magnitude of said field is varied, the configuration of said external field being such that the ends of said Wiegand wire are subjected to an external field of relatively minimal absolute magnitude in an axial direction when said wire switches state under the influence of said external field.