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Heating method for accelerometer

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

Active Publication Date: 2012-11-14
BEIJING MECHANICAL EQUIP INST
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  • Summary
  • Abstract
  • Description
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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 concrete steps of a kind of accelerometer heating method are:

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

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

[0031] The function of the heating module A i...

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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 heatcapacity 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 the performance of the 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 common 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] During the heating process of the accelerometer, it usually e...

Claims

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Application Information

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Patent Type & Authority Patents(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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