Test method and device for accelerometer resolution

Abstract

The invention relates to a test method of the resolution of an accelerometer and a device. A slave centrifugal machine in double centrifugal machines is arranged on a rotation bench face of a main centrifugal machine. The accelerometer is arranged on a rotation bench face of the slave centrifugal machine. A sensitive shaft of the accelerometer has a sensitive shaft angle. When the main centrifugal machine is rotating, centrifugal accelerated speed generated on the slave centrifugal machine has a component. The accelerometer outputs corresponding data under the function of the component. According to a biological geometrical relation between the accelerometer and the double centrifugal machines, the sensitive shaft angle is changed by rotating the slave centrifugal machine, so a difference value of different output value of the accelerometer can be obtained. By changing a target centrifugal accelerated speed value generated on the slave centrifugal machine by the main centrifugal machine, the difference value of different output data of the accelerometer is obtained under different sensitive shaft angles. According to the ratio of a secondary difference value of the pervious and latter difference values to an ideal output value of the accelerometer under a target accelerated speed increment value, whether the resolution of the accelerometer reaches the standard is judged.

Description

technical field [0001] The invention relates to the technical field of accelerometer testing, in particular to a method and device for testing the resolution of an accelerometer. Background technique [0002] Accelerometers are widely used in vibration detection, motion recognition, status recording, and automotive airbags. In the development, production and use of the accelerometer, the performance of the accelerometer needs to be calibrated. [0003] The performance indicators of the accelerometer within ±1g can be tested by using the gravity field 1g rollover test, but the measurement range is limited within ±1g. Since the magnitude and direction of the gravitational acceleration can be accurately known, the resolution of the accelerometer is usually tested by a 1g tumbling test in the gravitational field. [0004] However, for accelerometers with a measuring range of more than 1g, the test calibration of its resolution needs to be completed with other equipment, such a...

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Problems solved by technology

[0005] Based on this, it is necessary to provide a test method and device for accelerometer resolution in view of the relatively high hardware cost required for the test and calibration of accelerometer-related static performance indicators with a range greater than 1g.

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