What is the Vibration Resistance of Quartz Accelerometer?

The quartz flexible accelerometer is an important measurement component in the strapdown inertial navigation system. The real-time velocity of the carrier can be obtained by connecting the three points in the coordinate system of the moving carrier, and the current position of the carrier can be obtained by the quadratic integration of the accelerometer. If there is an error in the output value of the accelerometer, the error will be amplified with the integration of time, so the accuracy of the accelerometer will directly affect the accuracy of the entire inertial system. The characteristic of strapdown inertial navigation is that the measurement device is installed on the main body of navigation information such as missiles, ships and aircraft, so in practical application, the accelerometer may be in the vibration, shock, temperature change and other harsh environmental conditions for a long time, which has a great impact on its measurement accuracy, stability and life. The inertial navigation has strict requirements on the performance of the quartz flexible accelerometer. If it has high accuracy and good stability, it can extend the working cycle of the whole system and improve the working efficiency.

The pendulum plate of quartz flexible accelerometer is formed by quartz material after laser cutting, acid etching and other special processing, and the thermal expansion coefficient is very small, which is 1/10~1/20 of ordinary glass, but quartz glass is a brittle material, and the thickness of the flexible beam is 0.03mm, which is easy to break. In actual work, the accelerometer may often be in a harsh environment such as vibration, shock, and temperature upheaval, which has a great test for its accuracy and stability. In addition, the uneven thickness of the flexible beam edge will also reduce the reliability of the pendulum. Therefore, to study the impact resistance of quartz flexible accelerometer is to study the impact resistance of pendulum components. The designed quartz accelerometer ER-QA-02A has the characteristics of vibration resistance, and maintains 100 (3~7 days)μg in the bias repeatability, the scale factor stability is less than 100 (3~7 days)ppm, and the operating temperature can reach -45~+150℃.

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Email : info@ericcointernational.com

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