Linear variable differential transformer type sensor and winding method

Abstract

The invention belongs to the field of linear variable differential transformer type sensors, and relates to a linear variable differential transformer type sensor and a winding method. The sensor is characterized in that along the axial direction of a coil spool (3), the coil density of a secondary coil A is gradually increased, the coil density of a secondary coil B is reduced, the secondary coil A and the secondary coil B are arranged around the whole coil spool (3), the coil total numbers of the secondary coil A and the secondary coil B are basically the same in any segment of the coil spool (3), and discrete coils are employed so that manual winding is facilitated. According to the linear variable differential transformer type sensor coil winding method, the measuring range ratio is high, the usage efficiency of the coil spool of the sensor is improved, constant sum-value voltage is output, and online monitoring of the sensor is facilitated.

Description

technical field [0001] The invention belongs to the field of linear variable differential transformer sensors and relates to a winding method for linear variable differential transformer sensors. Background technique [0002] As a position detection component, the linear variable differential transformer sensor is widely used in aviation and aerospace fields. The common stepped coil, the primary coil of the sensor is wound on the coil frame, and the two sets of secondary coils are symmetrically wound on the left and right ends of the coil frame; under the alternating voltage, the internal magnetic field of the coil frame is approximately evenly distributed at any time; The induced voltage difference generated by the two sets of secondary coils when the iron core moves is used as the output. Since the iron core cannot cross the midpoint of the sensor, the effective stroke of the sensor does not exceed twice the length of the iron core; at the same time, because the turns of ...

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Problems solved by technology

Since the iron core cannot cross the midpoint of the sensor, the effective stroke of the sensor does not exceed twice the length of the iron core; at the same time, because the number of turns of the two sets of secondary coils of the sensor changes along the axis of the sensor, the sum of the turns covered when the iron core moves produces Changes, resulting in the small middle of the sensor and the value voltage, and large at both ends, which is not conducive to the online monitoring of the sensor

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