Differential transformer type line displacement sensor and manufacture and use methods thereof

Abstract

The invention relates to a differential transformer type line displacement sensor which comprises an armature, a framework, a primary winding, a secondary winding I and a secondary winding II, wherein a compensation winding I and a compensation winding II are arranged between the secondary winding I and the secondary winding II; phases of the secondary winding I and the secondary winding II are opposite, phases of the compensation winding I and the secondary winding I are same, phases of the compensation winding II and the secondary winding II are same, the tail end of the secondary winding I is connected with the tail end of the compensation winding II, the starting end of the secondary winding II is connected with the tail end of the compensation winding I, and the starting end of the compensation winding I is connected with the starting end of the compensation winding II to be used as a public end. A manufacture method comprises the steps of processing the framework and the armature, winding, regulating and fixing. Voltages of starting ends of the secondary winding I and the secondary winding II are Va and Vb, whether the sum of Va+Vb is within a specified range is judged through calculation, and whether random failures occurs is judged. The differential transformer type line displacement sensor is miniaturized, and has basically same mechanical stroke and linear range; and by using the method, correctness of output signals are effectively judged.

Description

technical field [0001] The invention relates to the field of displacement sensors, in particular to a differential transformer type linear displacement sensor and a manufacturing and using method thereof. Background technique [0002] Differential transformer type linear displacement sensor such as figure 1 As shown, it mainly includes an armature 1 arranged in the center, a skeleton 3 , a primary winding 4 , a secondary winding 5 , a secondary winding 2 6 and a casing 2 . The coupling between primary winding 4 and secondary winding one 5 and secondary winding two 6 can change with the movement of armature 1, that is, the mutual inductance between windings changes with the measured displacement. The number of primary winding 4 turns is Wi; the number of secondary winding one 5 turns is Wa; the number of secondary winding two 6 turns is Wb. [0003] When the armature 1 moves to the side of the secondary winding 6, the mutual inductance W b increase, W b The winding genera...

AI Technical Summary

Problems solved by technology

That is, if the linear range of the linear displacement is 10cm, the mechanical stroke must not be less than 20cm. In this way, the miniaturization of the differential transformer linear displacement sensor cannot be realized.

[0019] 2) The output signal cannot be detected

The displacement calculated in this way is that the armature moved 85mm to the left, which has a large error with the actual stroke.

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