Low-cost temperature control system for micromechanical inertial measurement combination

Abstract

The invention provides a low-cost temperature control system for a micromechanical inertial measurement combination and relates to the field of micromechanical inertial measurement. The temperature control system comprises a temperature control and insulation module, a signal collection, processing and communication module and a temperature control module, wherein an analog-to-digital conversion circuit converts a signal of a micromechanical inertial measurement sensor accelerometer, a gyro signal and a temperature signal into digital values by directly taking a micromechanical inertial measurement sensor as a temperature control object; temperature compensation is carried out through a signal collection, processing and communication circuit by virtue of a microcontroller, and meanwhile, temperature information is sent to a temperature control circuit; and the temperature control circuit collects the temperature of a controlled object and multi-circuit control compensation physical quantity of the system, carries out algorithm solution and drives a heating piece by virtue of PWM control power to heat a heat preservation cavity. According to the low-cost temperature control system provided by the invention, the accuracy of the micromechanical inertial measurement combination is remarkably improved. The low-cost temperature control system has the characteristics of low cost, high control accuracy and strong environmental adaptability.

Description

technical field [0001] The invention relates to the field of micro-mechanical inertial measurement, in particular to a low-cost micro-mechanical inertial measurement combined temperature control system. Background technique [0002] With the continuous development of inertial technology, the requirements for the combined precision of inertial measurement are getting higher and higher, and the system for reducing various errors of inertial system has also been researched and applied. Micromechanical (MEMS) inertial measurement devices have been widely used in inertial measurement combinations due to their advantages of long life, low cost, small size, high reliability, short preparation time and low power consumption. However, the precision of micromechanical inertial sensors is lower than that of mechanical, optical fiber and other inertial measurement sensors, and environmental temperature changes have a greater impact on the accuracy of micromechanical inertial sensors. In...

AI Technical Summary

Problems solved by technology

However, the precision of micromechanical inertial sensors is lower than that of mechanical, optical fiber and other inertial measurement sensors, and environmental temperature changes have a greater impact on the accuracy of micromechanical inertial sensors. In order to reduce the influence of temperature on the precision of micromechanical inertial sensors, a temperature control is designed. System, in the combination of the overall scheme, the same temperature can be used for temperature control and temperature compensation of the micro-mechanical inertial sensor, and the isolation of the micro-mechanical inertial signal acquisition and processing circuit and the temperature control circuit is guaranteed, which can effectively improve the low-cost micro-mechanical Accuracy of Inertial Measurement Units

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