Temperature control device and temperature control method thereof for high-precision quartz accelerometers

Abstract

The invention discloses a temperature control device and a temperature control method thereof for high-precision quartz accelerometers. The temperature control device comprises the quartz accelerometers, a body, heating sheets, a thermally-insulated cover, cushion blocks and temperature sensors, wherein the body adopts a solid cubic structure, and three quartz accelerometers which are mutually orthogonal are mounted on the body separately; a meter case of each quartz accelerometer is adhered with one heating sheet for heating, the meter case of each quartz accelerometer is adhered with one temperature sensor, and one temperature sensor is adhered to the interior of each quartz accelerometer; the thermally-insulated cover sleeve the quartz accelerometers, the body and the heating sheets, and is used for isolating heat exchange with the external environment; and the body is fixedly connected to an inertial measurement device, and isolates heat exchange with the external environment by means of the cushion blocks. Through adopting the temperature control method of case-level temperature control and core-level temperature compensation, the contradiction between rapidity of temperaturerise of the accelerometers and influence of high current on accelerometer precision is eliminated, and the defects of the traditional temperature control and temperature compensation method are offset.

Description

technical field [0001] The invention relates to a temperature control device and a temperature control method of a high-precision quartz accelerometer, which is especially suitable for space navigation and guidance, and belongs to the technical field of inertial measurement. Background technique [0002] Quartz pendulum accelerometer (hereinafter referred to as accelerometer) has many advantages such as high precision, low cost, and small size. As one of the most important devices in inertial measurement and navigation systems, its measurement accuracy directly affects the accuracy of inertial navigation systems. Factors such as ambient temperature, vibration, magnetic field, and air pressure will all affect the accuracy of the accelerometer, and the impact of ambient temperature is particularly important. Therefore, the influence of ambient temperature needs to be considered when designing the inertial navigation system. [0003] At present, the domestic measures to improv...

AI Technical Summary

Problems solved by technology

[0005] First, the design of the temperature field characteristics of the accelerometer is not reasonable enough, resulting in low output accuracy of the accelerometer, and it takes a long time to achieve stable performance after startup

[0006] Second, the internal temperature fluctuation range of the accelerometer is too large, and the output of the accelerometer is prone to fluctuate with the temperature and temperature gradient, and the accuracy cannot be improved through temperature control

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