Real-time Measurement Method of Vibration Displacement of Object in Inertial Space

Abstract

The invention discloses a real-time measurement method for the vibration displacement of an object in an inertial space. A smooth rod and a slider are arranged on the object to be measured, the smooth rod is fixed on the object, and the slider is slidably sleeved on the object. On the smooth rod, by applying an external force to the slider, the external force, self-weight and frictional resistance of the slider along the direction of the smooth rod are in a force balance state, and the slider maintains an absolute position The substantially constant suspension is set on the smooth rod; when the object vibrates, the real-time measurement of the vibration displacement of the object in the inertial space is realized by measuring the relative displacement between the smooth rod and the slider . The real-time measurement method of the vibration displacement of the object in the inertial space of the present invention cleverly reflects the vibration displacement of the object through the relative displacement of the smooth bar and the slider, has the advantages of simple and reliable structure, high measurement accuracy, and can quickly and directly reflect the vibration displacement data The advantages.

Description

technical field [0001] The invention relates to the technical field of object vibration displacement measurement in inertial space, in particular to a real-time measurement method for object vibration displacement in inertial space. Background technique [0002] At present, there are two main methods for measuring the displacement of objects vibrating in inertial space in the prior art: 1. Secondary integration based on the acceleration sensor whose initial condition is zero: S=at 2 / 2(S: Displacement, a: Acceleration, t: Time) to get the displacement; 2. Multi-sensor fusion technology, such as multiple sensors to measure together or use the installation position of the sensor to establish a corresponding relationship for measurement. [0003] However, the applicant found that the first method based on the second integration of the acceleration sensor to obtain the displacement has drift caused by noise, which can only work for a short time, but cannot run continuously for a...

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Problems solved by technology

[0003] However, the applicant found that the first method based on the second integration of the acceleration sensor to obtain the displacement has drift caused by noise, which can only work for a short time, but cannot run continuously for a long time, and the filtering method will introduce problems such as phase deviation. ; The disadvantage of the second multi-sensor fusion technology is that the multi-sensor cost is high, and it still cannot effectively remove the drift

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