Potting method of line displacement sensor of differential transformer for aerospace

A technology of linear displacement sensor and differential transformer, applied in the manufacture of inductors/transformers/magnets, instruments, coils, etc., can solve the problems of poor performance of anti-vibration, anti-shock and anti-acceleration indicators, so as to improve oil resistance and improve the overall quality, the effect of avoiding direct exposure

CN108054004AActive Publication Date: 2018-05-18陕西驰诺电子科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-05-18
Patent Text Reader

Abstract

The invention discloses a potting method of a line displacement sensor of a differential transformer for aerospace. The potting method comprises the steps of preparing epoxy resin glue, uniformly coating the epoxy resin glue on an outer surface of a wound coil framework, pushing the coil framework into a shell of the line displacement sensor according to segments, and fully coating the epoxy resinglue between a push part of the coil framework and the shell until the whole coil framework is completely pushed into the shell; and cleaning resided epoxy resin, vertically placing the cleaned sensor, allowing a lead end to face upwards, observing whether a pit occurs in a lead outlet, supplementing the glue until the pit occurs until no pit occurs in the lead outlet to obtain the potted line displacement sensor, and vertically placing the obtained sensor in a baking oven for baking to obtain the sensor of which potting is completed. By the potting method, the problems of poor vibration resistance, impact resistance and acceleration-resistant index performance of the line displacement sensor of an existing differential transformer are solved.
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Description

Technical field

[0001] The invention belongs to the technical field of linear displacement sensors and precision electronic components, and in particular relates to a potting method for a differential transformer linear displacement sensor used in aerospace.

Background technique

[0002] At present, the differential transformer linear displacement sensor is more and more used in the servo control system of aerospace, and the attitude of the aircraft is adjusted through the precise measurement of the sensor. Therefore, the service life and working reliability of the differential transformer linear displacement sensor seriously threaten the flight safety of the aircraft. Although some places use redundant differential transformer linear displacement sensors, this problem is alleviated to a certain extent threat, but it still has an important impact on flight safety.

[0003] Since there is a gap between the shell and the skeleton winding assembly of the differential trans...

Examples

Embodiment Construction

[0017] The present invention will be described in detail below.

[0018] A kind of potting method of the differential transformer line displacement sensor used in aerospace of the present invention, specifically comprises the following steps:

[0019] Step 1. Configure the epoxy resin glue for potting the linear displacement sensor.

[0020] Under the condition of ambient temperature of 23°C±5°C and humidity of 20%~70%, according to the weight ratio of 100g:3.5g, using an electronic scale with a precision of 0.1g, weigh the epoxy resin glue of model 2850FT and 9# Add the catalyst to the container, stir evenly, and let it stand for 2 hours. If the time is too long, the epoxy resin will be solidified, and if the time is too short, the reflection of the epoxy resin will not be complete, and the performance cannot be fully exerted. The surface is smooth, without bubbles or Porous epoxy glue.

[0021] The purpose of the 9# catalyst above is to make the epoxy resin glue cure bette...