Self-inductance based single-pole coil control rod position measuring sensor

Abstract

The disclosed single-coil measurement sensor for position of control rod based on self-induction principle in reactor measuring and controlling technique comprises a measurement mandrel space arranged with the magnetic inductive material and non-inductive material, a group of independent self-inductive measuring coils, a generating and amplifying circuit for pumping signal for coils, and the measurement circuit for inductive voltage in coil. This invention has small volume and stable running with convenient maintenance to provide security guarantee for reactor.

Description

technical field [0001] The invention belongs to the technical field of reactor measurement and control, and relates to a sensor for measuring the rod position of a reactor control rod, in particular to a sensor for measuring the rod position of a reactor control rod based on an inductive principle. Background technique [0002] Control rods and their driving mechanisms are important devices to ensure the safe operation of reactors. Under normal working conditions, by adjusting the position of the control rods, the normal start-up and shutdown of the reactor can be realized, so that the reactor can operate at a given power level or the reactor power can be adjusted; core reactivity, thereby enabling emergency shutdown. The rod position measurement system is one of the most important systems in the device, and its reliability and safety are related to the normal operation and safety of the entire reactor. [0003] At present, the reactor control rod position measurement sens...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the existing inductive rod position measurement sensor has a large volume and the damage of the primary excitation coil will lead to the overall failure of the sensor, the present invention provides a single-stage coil control rod rod position measurement sensor based on the principle of self-inductance. Measuring self-inductance The principle of self-inductance voltage change of the measuring coil works. The excitation coil and the measuring coil are combined into one, which specifically includes a measuring mandrel composed of magnetically permeable materials and non-magnetically permeable materials arranged at intervals, and a set of self-inductive coils for position measurement. Inductive measuring coils, generation circuits and amplifying circuits for generating excitation signals for the respective inductive measuring coils, and self-inductance voltage measuring circuits for measuring the self-inductance voltage of the self-inductive measuring coils; Internal movement; the respective sensing coils are independent, and there is no signal connection or function between them, and they correspond to independent excitation signal generation circuits, excitation signal amplification circuits and self-inductance voltage measurement circuits.

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