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Heating method for accelerometer

A technology of accelerometer and heating sheet, which is applied in speed/acceleration/shock measurement, navigation through speed/acceleration measurement, testing/calibration of speed/acceleration/shock measurement equipment, etc. It can solve the problem that the temperature of the accelerometer cannot be accurately controlled, etc. question

Active Publication Date: 2012-01-04
BEIJING MECHANICAL EQUIP INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of accelerometer heating method, solve the problem that the temperature of the accelerometer cannot be accurately controlled

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The specific steps of an accelerometer heating method are:

[0029] The first step is to build an accelerometer heating system

[0030] Accelerometer heating system, including: temperature sensor, A / D acquisition chip, microcontroller, integration circuit, transistor, relay, heater, heating module A, heating module B; temperature sensor output and A / D acquisition The chip analog signal input terminal wire is connected, the digital signal output terminal of the A / D acquisition chip is connected to the data interface wire of the microcontroller, the control terminal of the microcontroller is connected to the control terminal wire of the relay, and the relay output terminal is connected to the transistor base wire , The output terminal of the transistor is connected to the voltage terminal wire of the heating plate, and the heating plate is connected to the other control terminal wire of the microcontroller;

[0031] The function of the heating module A is to control the heating...

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Abstract

The invention discloses a heating method for an accelerometer. The accuracy of the accelerometer is influenced by a manufacturing process and self performances of internal structures and the like, and is related to environmental conditions. In the heating method, a mode combining two temperature control modes is adopted to quickly heat the accelerometer to a specified temperature, and ensures that the accelerometer works in a relatively constant temperature environment to resist influences caused by external temperature changes. In the method, the heating power of a heating plate and the heat capacity ratio of a carrier on which the accelerometer is are considered, and a heating module is switched at different times to ensure that the heating time is the shortest. By the method, the phenomenon of slow accelerometer heating and over-heating can be effectively controlled to achieve very good effects.

Description

Technical field [0001] The invention relates to a heating method, in particular to an accelerometer heating method. Background technique [0002] The accelerometer is one of the core sensitive components of the strapdown inertial navigation system, and its accuracy directly affects the attitude, speed and positioning accuracy of the navigation system. The accuracy of the accelerometer is not only affected by its own performance such as manufacturing process and internal structure, but also related to the environmental conditions. Among them, the influence of ambient temperature is particularly prominent. When the ambient temperature changes from -40°C to +60°C, the drift error will reach 2×10g-4 or even greater. A commonly used solution is to add a temperature control system to the accelerometer to make it work in a relatively constant temperature environment to resist the influence of external temperature changes. [0003] The accelerometer usually encounters slow heating or ove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P21/02G01C25/00G01C21/16
Inventor 葛晓飞李梅许诺
Owner BEIJING MECHANICAL EQUIP INST
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