Eddy current displacement sensor and its probe and coil

Abstract

The invention provides an eddy current displacement sensor, a probe and a coil. The probe comprises a winding bracket and a coil, and is characterized in that the winding bracket is in the shape of a rotary body as a whole and provided with a first end and a second end along the axis direction, wherein a matching portion is formed at the position close to the first end; and the coil is arranged on the winding bracket; the coil is in the shape of an annular rotary body as a whole, the middle part of the coil is provided with a through hole used for being matched with the matching portion, and the inner surface of the coil located at the position of the through hole forms a variable inner diameter section along the axis direction. The eddy current displacement sensor, the probe and the coil provided by the invention can meet installation and detection requirements simultaneously.

Description

technical field [0001] The invention relates to the field of sensors, in particular to an eddy current displacement sensor, a probe and a coil thereof. Background technique [0002] The eddy current displacement sensor can measure the distance between the measured metal conductor and the probe surface without contact, high linearity and high resolution. It is a non-contact linearization measurement tool. The eddy current displacement sensor is often used in the state analysis of high-speed rotating machinery and reciprocating motion machinery, vibration research, analysis and measurement, it can obtain non-contact high-precision vibration and displacement signals, and can continuously and accurately collect various vibration states of the rotor. Parameters such as radial vibration, amplitude, and axial position of the shaft. Eddy current sensors are widely used in online monitoring and fault diagnosis of large rotating machinery due to their long-term reliability, wide meas...

AI Technical Summary

Problems solved by technology

When the object to be detected has very limited space for installing the probe due to its own structural limitations, it is necessary to select an eddy current displacement sensor with a smaller probe size as much as possible to realize the installation of the probe; at the same time, due to the size of the probe When it is small, the size of its coil is also small, and the corresponding linear measurement range is also small, which may not meet the detection requirements.

That is to say, for the occasions where the installation space is narrow, the current eddy current displacement sensor has the problem of being unsuitable when the measurement range is required to be high.

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