SU697802A1 - Transformer-type transducer - Google Patents

Description

i

The invention relates to a reference measurement technique and can be used, in particular, to measure small reinterlacing, gaps and temperature in the gap.

Known inductive or transformer displacement transducers, the principle of action of which is based on the excitation of eddy currents in a moving metal surface relative to the transducer, allow measuring only the gap or a small displacement 1. If necessary, the measurements in the gap also add thermal conversion. Sometimes it is difficult because of the smallness of the gap itself.

The closest technical solution to the invention is a transformer converter for measuring the temperature gap, comprising an excitation winding and a measuring winding, by connecting them respectively to a high-frequency power source and voltage recorder to measure the gap between the converter and the surface of the metal body, near which the converter is mounted 2 When the measuring winding is connected to the resistance meter (with the air winding turned off It can be controlled the temperature in the gap, however, the accuracy of temperature measurement by a known transducer is low. The accuracy of the gap measurement is also limited by the presence of a mutual inductance connection between the turns of the field winding and the measuring winding.

The aim of the invention is to increase the accuracy of the measurement of the gap and the temperature in the gap.

For this, the excitation winding and the measuring winding are made in the form of a flat bifillary helix with current leads from its center and ends.

Claims (3)

FIG. 1 schematically shows a converter; in fig. 2 - electrical circuit; in fig. 3 - output characteristic depending on temperature; in fig. 4 - output characteristic depending on the size of the gap. The transformer converter comprises an excitation winding 1 and a measuring winding 2, which are made in the form of a flat bifillary coil having a current collector 3 from the midpoint and a current collector 4 and 5 from its ends. The temperature dependence o6uierG of the resistance of the windings makes it possible to measure the temperature in the gap with this converter. The Converter operates as follows. The winding 1 with the collectors 4 and 3 is connected to a high frequency generator (not shown in the figures) and the winding 2 with the collectors 5 and 3 is connected to a voltage recorder (not shown in the figures). When moving the windings 1 and 2 perpendicular to the conductive surface 6, the magnetic flux and the voltage induced in the measuring winding 2 change. By changing the voltage on one winding, the gap value is judged. According to the change in the sum of the martial active resistances of the windings and 1 and 2, the temperature in the gap is judged. The value of this resistance is monitored by connecting an active resistance meter between windings 1 and 2 between the current leads 4 and 5. By making the converter windings in the form of a flat bifillary helix, the accuracy of measuring the gap and the temperature in the gap is improved. A transformer converter for measuring a temperature gap containing an excitation winding and a measuring winding, characterized by the fact that, in order to improve the measurement accuracy, the excitation winding and the measuring winding are made in the form of a flat bifillary coil with current leads from its center and ends. . Sources of information taken into account in the examination. Ageikin DI Sensors of control and regulation. M., “Mashinostroenie, 1965, p. 131 2. Mikhlin B. 3. High-frequency capacitive and inductive sensors, M.-L., Gosenergoizdat, I960, p. 20 - 28 (prototype). BUT (rig 2 S Fig.Z T / fo, xC6 FIG.