SU953604A1 - Small size three-component ferroprobe - Google Patents

Description

one

The invention relates to a measurement technique and can be used to simultaneously measure the three orthogonal components of the induction vector of a weak inhomogeneous magnetic field.

The small-sized three-component ferrozond containing a cube case, on each face of which a ring core with a toroidal excitation winding is symmetrically mounted relative to the center, is known. The excitation windings are connected in series, and three measuring windings are placed orthogonal to each other along the edges of the fij

A disadvantage of this device is the low measurement accuracy caused by interference noise in each measuring winding from the six excitation windings of the ring cores.

The closest to the invention in its technical essence is a compact three-component ferrosonde containing a cylindrical body, on which, at an angle of k5 to the generator surface, two intersecting elliptical turns of the magnetic core are fastened. The housing with the magnetic circuit is provided with a toroidal excitation winding and is covered by three orthogonal measuring windings, one of which lies in the plane of the points of intersection of the turns of the magnetic circuit 2.

However, the known ferrosonde does not provide a sufficiently high accuracy of measuring weak magnetic fields due to the significant magnetic noise of the core, due to the heterogeneity of magnetization of the elliptical turns of the magnetic core by the toroidal excitation winding. The goal of the invention is to increase the point. The goal is achieved by the fact that in a compact three-component ferrosonde containing a core body, a magnetic circuit of two closed intersecting permalloy tape windings located on the surface of the core body, an excitation winding and three orthogonal measuring windings, the core body is made in the form of a ball with a hole through which the field winding is uniformly applied on the surface of the ball, and the axis of the windings of the magnetic circuit are mutually perpendicular and lie in one planes with the axis of the hole crossing the axis of the windings at an angle k in the center of the ball. The drawing shows the proposed small three-component ferrosonde. The ferrosonde contains the body 1 of the serdecian in the form of a ball, on the surface of which at an angle of 90 to each other is laid) the turns of two windings 2 and 3 of the magnetic conduit made of permalloy tape. An excitation winding 5 is uniformly applied on the surface of the ball through the hole. Three orthogonal measuring windings 6-8 Oh cover the body 1 of the core. Ferrosonde works as follows. The ferrosonde is placed in a better measured field, and an alternating current Xg is supplied to the excitation winding 5, which periodically magnetizes the windings 2 and 3 of the magnetic core to saturation modulating its magnetic permeability. In the measuring windings 6-8, the emf e, G f and em are induced: the doubled frequency of the field 4 of the excitation is proportional to the orthogonal components X, Y and Z of the vector of the measured magnetic induction. These signals are amplified, detected and measured. The magnetic circuit (windings 2 and 3) on the housing 1 is magnetized by the excitation winding 5 uniformly due to its annular shape, which leads to a decrease of about. four times the magnetic noise of the proposed device as compared with the known (with elliptical turns of the magnetic circuit. Due to this, the accuracy of measurements of weak magnetic fields is four times higher. Inventive form Small-sized three-component ferrosonde, comprising a core body, the magnetic circuit of two closed permalloyed windings of tape on the surface. a core core, an excitation winding and three orthogonal measuring windings, characterized in that, in order to improve the accuracy Measurements, the core body is made in the form of a ball with a hole through which the field winding is uniformly applied on the surface of the ball, the axes of the windings of the magnetic circuit are mutually perpendicular and lie in the same plane with the axis of the hole intersecting the axes of the windings at an angle of 5 ° in the center of the ball. , taken into account during the examination 1. Authors certificate of the USSR (Commonwealth of Independent States) No. 650032, class G 01 R 33/02, 19792. Author's certificate of the USSR No. 36559, class 001 R 33/02, 1973.

Claims (1)

Claim A small three-component fluxgate containing a core body, a magnetic core from two closed intersecting permalloy windings. tapes located on the surface. core body, field winding and three orthogonal measuring windings, characterized in that, in order to increase the accuracy of measurements ₍ core, the core body is made in the form of a ball with a hole through which the field coil is uniformly applied on the surface of the ball, and the axis of the magnetic coil windings are mutually perpendicular and lie in the same plane 'with the axis of the hole intersecting the axis of the windings at an angle of 45 ° in the center of the ball.