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Installation method of embedded miniature stress sensor for solid rocket motor

A technology of stress sensors and solid rockets, which is applied in the direction of rocket engine devices, machines/engines, mechanical equipment, etc., and can solve problems such as danger and the impact of engine structural integrity

Active Publication Date: 2017-01-11
XIAN AEROSPACE PROPULSION TESTING TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is mainly due to the particularity of the solid rocket motor, which is equipped with high-energy propellant grains. If the sensor is not installed properly, it may have a certain impact on the integrity of the engine structure, and even cause danger.

Method used

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  • Installation method of embedded miniature stress sensor for solid rocket motor
  • Installation method of embedded miniature stress sensor for solid rocket motor

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Embodiment Construction

[0018] Describe the present invention below in conjunction with specific embodiment:

[0019] Such as figure 1 As shown, the external dimension of the miniature stress sensor is that the diameter is less than 8mm and the thickness is less than 3mm. The purpose of this embodiment is to propose an installation method to be applied to the installation process of the embedded miniature stress sensor inside the solid rocket motor, and reduce the sensor's The impact of embedding on the structure and performance of the engine ensures that the sensor can work normally after being embedded in the engine.

[0020] The specific steps are:

[0021] Step 1: Since multiple sensors need to be embedded in each solid rocket motor, the micro stress sensors are numbered according to the installation positions of the micro stress sensors in the engine, and the zero point of each micro stress sensor is detected. The method of detecting the zero point of the sensor: by loading a 5V DC intrinsical...

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Abstract

The invention provides a mounting method of an embedded miniature stress sensor for a solid rocket engine. The mounting method comprises the following steps: mounting the miniature stress sensor on a heat insulating layer at the inner part of the engine, so that the outer casing and a propellant grain of the engine are not damaged, and influence on the structural integrity of the engine is reduced to the lowest level; and besides, segregating the embedded miniature stress sensor from the propellant grain of the engine through spraying a lining layer, and the situation that the electrical property of the sensor is unstable because of the chemical corrosion of a propellant in a long-term storing process is avoided.

Description

technical field [0001] The invention relates to an installation method of a miniature stress sensor, in particular to an installation method of an embedded miniature stress sensor for a solid rocket motor. Background technique [0002] Stress is an important parameter to characterize the evolution of damage state of solid rocket motor structure. With the deepening of solid rocket motor research, a method is needed to realize real-time monitoring of the changes in the internal and interface stress of the motor grain, realize engine health prediction / diagnosis, and provide a new and effective technical means for engine life estimation to improve Engine life estimation level and accuracy. [0003] At present, there are miniature stress sensors capable of embedding in China, but there is no installation method and operation steps for installing such sensors inside the solid rocket motor. This is mainly due to the particularity of the solid rocket motor, which is equipped with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02K9/96
Inventor 邓海涛段晶张锐
Owner XIAN AEROSPACE PROPULSION TESTING TECH RES INST