METHOD FOR IMPROVEMENT OF OPERATION STABILITY OF REGISTRATION SENSOR OF WHEEL PASSAGE TO AMBIENT TEMPERATURE EFFECT AND TRACTION CURRENT RUSHES AND CORRESPONDING REGISTRATION SENSOR OF WHEEL PASSAGE Russian patent published in 2018 - IPC B61L1/16 

FIELD: electricity.

SUBSTANCE: sensor of wheel passage uses a circuit for registering the parameters of inductance coil, a temperature sensor and a table, the data from which change the parameters of registration circuit depending on the temperature sensor data so that changing the coil parameters from the temperature effect would not affect the result of registering the wheel pass. The registration circuit uses an autonomous master oscillator and an oscillating circuit, which includes an inductance coil. The values of frequency and amplitude of the curcuit drive current are controlled using said table, which contains current frequency and amplitude control codes that are individual for each sensor instance and which are selected in accordance with the value supplied from the temperature sensor. Wherein as the sensitive element of the temperature sensor, the resistance of the inductance coil to the direct current is used.

EFFECT: increase the stability of sensor operation when exposed to thrust current and when exposed to ambient temperature over the entire operating temperature range.

6 cl, 1 dwg