Ultra low temperature vibration sensor

A vibration sensor and ultra-low temperature technology, applied in the field of aerospace sensors, can solve problems such as no way to check, achieve a wide range of operating temperatures, improve strain capacity and transient temperature characteristics, and prevent product damage.

Active Publication Date: 2017-05-31
BEIJING RES INST OF TELEMETRY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, there is no related technology in China, and re

Method used

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] An ultra-low temperature vibration sensor belonging to the isolated base center compression piezoelectric accelerometer, such as figure 1 As shown, the sensor includes a sensitive component 1, an output assembly 2 and a housing 3;

[0030] The internal electrical connections of the sensors all adopt spot welding; the housing 3 is connected to the sensitive component 1 by laser welding; the output assembly 2 is connected to the housing 3 by laser welding. The sensor of the present invention is packaged by laser welding in an inert gas atmosphere environment, so that the inside of the sensor is filled with inert gas, so as to prevent water vapor condensation in an ultra-low temperature environment from reducing the insulation resistance of the sensor.

[0031] The sensitive component 1 adopts an isolation base center compression structure, and converts the mechan...

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Abstract

The invention discloses an ultra low temperature vibration sensor. External power supply is not needed in working, the sensor has no electronic components inside, the temperature range of use is wide, and the sensor is not limited by the electronic components. The operating temperature range of the ultra low temperature vibration sensor is -253 DEG C to 200 DEG C, the temperature error of measurement sensitivity is not larger than 10%, and the product performance index satisfies a vibration impact measurement requirement of a liquid hydrogen or liquid oxygen engine under a low temperature environment.

Description

technical field [0001] The invention relates to an ultra-low temperature vibration sensor, which belongs to the technical field of aerospace sensors. Background technique [0002] During the flight of the aircraft, the vibration of the structure is caused by the excitation of the engine, the separation of the stages, and the aerodynamic force. The strong and continuous vibration will have a great impact on the structure. In order to determine the vibration and shock environment of the aircraft, in order to provide the basis for the design of the aircraft structure and the conditions of the instrument and equipment test, the vibration parameters of the aircraft must be measured, and the measurement results are also an important basis for failure analysis. [0003] In the measurement of vibration and shock parameters of aircraft, the vibration measurement of the engine is a very important part. In order to ensure flight safety, not only the vibration of the engine should be m...

Claims

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Application Information

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IPC IPC(8): G01P15/09G01P1/00G01M15/02
CPCG01M15/02G01P1/00G01P15/09
Inventor 何勤彭泳卿张颖轩鲁敏
Owner BEIJING RES INST OF TELEMETRY
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