Acceleration sensor low frequency calibration platform and usage method for the same

Abstract

The invention discloses an acceleration sensor low frequency calibration platform and a usage method for the same. The acceleration sensor low frequency calibration platform comprises a disc type precision centrifuge, a linear guide rail and a sliding table; the linear guide rail is fixedly installed on a rotation plate of the disc type precision centrifuge through a guide rail support and overlaps with a diameter direction of the rotation plate of the disc type precision centrifuge; and the sliding table is installed on the linear guide rail and can perform reciprocating sliding along the linear guide rail. The invention provides a low frequency calibration device combining the centrifuge and the sliding table. A reference acceleration load is provided to the siding table through the centrifuge and a distance between the sliding table and the rotation center of the centrifuge is regulated through sliding of the sliding table so as to realize the fact that an acceleration load changes according to a sine rule. Finally, on the premise that the travel of the sliding table is not increased, the acceleration sensor low frequency calibration platform and the usage method for the same can achieve extremely low frequency and a large acceleration load and greatly improve signal-to-noise ratio of an output signal of a calibrated sensor.

Description

technical field [0001] The invention relates to a calibration device, in particular to a low-frequency calibration platform for an acceleration sensor and a method for using the same. Background technique [0002] The low-frequency calibration equipment of the acceleration sensor mostly adopts two forms of specially developed low-frequency vibration table and low-frequency slide table, among which the low-frequency slide table is more used because of its larger stroke. The low-frequency sliding table drives the sliding table on the linear guide rail, that is, installs the standard sensor and the sensor to be calibrated on the sliding table, and then drives the sliding table to reciprocate left and right on the linear guide rail, thereby generating a sinusoidal motion over time. The changing acceleration load acts on the sensor on the sliding table, and then the sensor is calibrated. [0003] Whether it is a low-frequency vibrating table or a low-frequency sliding table, the...

AI Technical Summary

Problems solved by technology

It can be obtained by calculation, if you want to get 0.1g (0.98m / s) under the condition of 0.1Hz 2 ) acceleration load, the required vibration displacement amplitude is 2.48m, and the total length of the sliding table reaches 4.96m, and such a long stroke will make the distortion of the vibration waveform unable to meet the requirements

In fact, regardless of the low-frequency slide table or the low-frequency vibration table, such a long stroke is basically not achievable in actual engineering.

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