SU536447A1 - Precision Induction Meter - Google Patents

Description

(54) PRECISION INDUCTION METER

3

interconnected in parallel. The sensors themselves are connected in series. A selective amplifier 5 and a switching generator 6 are connected to the automatic switch at the switch; they are connected via a phase-sensitive rectifier 7 to an electromagnet of five measuring devices | M 9.

The current from the alternating current source / flows through the sensors 2 and 3. When one of the sensors of the measured magnetic field 1 is applied to them, a differential voltage arises on them, which by means of the automatic switch 4 is fed to the input of the selective amplifier 5, oscillation frequency of the generator 6. The received signals arrive at a phase sensing rectifier 7.

One of the sensors, in this case, the sensor 3, is affected by the magnetic field of the electromagnet 8. In turn, the signals received from the sensors and processed further by an electrical circuit consisting of a1 automatic switch, selective amplifier, switching generator and phase-shifting generator , affect the operation of the electromagnet 8. The end result is observed from 1 to 1 by the measuring device 9. The current in the winding of the electromagnet, recorded by this, m device, uniquely determines the measurement p emuyu nnduktsiyu alternating magnetic field.

Thus, the magnetic induction created by the electromagnet, acting on the sensor, placed in its zero, automatically brings the whole circuit into a state of equilibrium.

Accurately; the amount of measured data is so high, and the sensitivity of the described gauge is so much higher than the sensitivity

a known gauge, which allows, when selecting the appropriate measuring instrument, to conduct measurements of magnetic fields occurring during the movement of a magnetic device with a signalogram too low on it, or similar zeros having fluctuations.

FOR LA LA invention

A precision I1 induction meter containing two sensors | Ka magnetic field, connected in series, a power source and an automatic switch connected to both sensors in parallel, connected in series with an automatic switch; a selective amplifier, a phase-sensitive amplifier, and a switching generator, connected between the automatic switch and the phase-sensing rectifier, characterized in that, in order to increase the efficiency their accuracy

an electromagnet, one output of which is connected to the phase-sensitive rectifier directly, and the other through a measuring device, while one of the sensors is placed in the zero of the electromagnet.

Sources of information taken into account in the examination:

1. Works of metrolopic institutes of the USSR, no. 133 (193), 1971, A. Andrievsky, et al. “A New Method for Measuring the Induction of Variable Magnetic Fields (Prototype).”

2. Avt. swith USSR № 421948, M. CL. G 01 R 25/00 and G 11B 5/00, 7.02.72.

3. US patent number 3409884, cl. 340-174. 1, 5.11.68.