Flexible board wiring coil and LVDT linear displacement sensor

Abstract

The invention discloses an LVDT linear displacement sensor with flexible board wiring. The LVDT linear displacement sensor comprises a coil arranged on a flexible board, sleeves are arranged inside and outside the coil; two ends of the sleeve are blocked by end covers; a plurality of spiral layers are laid on the flexible board; each spiral layer is provided with a plurality of spiral lines whichare not connected with one another; the flexible board is curled so that in the same spiral layer, the tail end of the previous spiral is connected with the head end of the next spiral, and among different spiral layers, the spiral at the tail end of the previous spiral layer is connected with the spiral line at the head end of the next spiral layer. The manufacturing process is simple, the lengthand the precision of the coil are not affected by the stroke and the precision of the winding machine, and the performance is more stable.

Description

technical field [0001] The invention relates to the technical field of sensor manufacturing, and more specifically relates to a coil of flexible board wiring and an LVDT linear displacement sensor. Background technique [0002] LVDT (Linear.Variable.Differential.Transformer) is the abbreviation of linear variable differential transformer. It is composed of a primary coil, two secondary coils, iron core, coil skeleton, shell and other components. When the iron core is from the middle to both sides When moving, the difference between the output voltages of the two secondary coils has a linear relationship with the movement of the iron core. [0003] The coil of the existing LVDT sensor is made by a winding machine, therefore, the winding accuracy and length of the coil are deeply limited by the accuracy and stroke of the winding machine. On the one hand, the winding accuracy is easily affected by the flatness of the enameled wire that has been wound, and the flatness of the w...

AI Technical Summary

Problems solved by technology

[0003] The coil of the existing LVDT sensor is made by a winding machine, therefore, the winding accuracy and length of the coil will be deeply limited by the accuracy and stroke of the winding machine

On the one hand, the winding accuracy is easily affected by the flatness of the enameled wire that has been wound, and the flatness of the winding is caused by the cumulative error of the wire diameter of the winding. Therefore, with the accuracy of the existing winding machine, the winding In the case of a large number, the accumulation of errors is high, and the flatness of the winding surface is reduced, resulting in a decrease in winding accuracy.

On the other hand, the stroke of the winding machine directly affects the length of the winding. If it is necessary to increase the length of the winding, it is necessary to use a winding machine with a longer stroke, and the equipment cost will increase.

[0004] To sum up, in the actual production process, the precision and stroke of the winding machine greatly limit the precision and length of the LVDT type sensor coil, reducing product performance and production efficiency, which is not conducive to technology development and market sales

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