A three-dimensional attitude measurement device for air-floating ball bearings

Abstract

The invention discloses an air floating ball bearing three-dimensional attitude measurement device. An equatorial plane adaptor is connected with the upper mounting end face of an air floating ball, a ring surface on the lower portion of the equatorial plane adaptor and an equatorial plane of the air floating ball are coplanar, an outer ring is mounted on an air floating ball socket and a base, an inner ring is mounted on the outer ring, an inner ring driving motor is connected with the outer ring and the inner ring, the inner ring is driven to rotate relative to the outer ring by feedback deflection of a rolling gap sensor, an outer ring driving motor is connected with the outer ring, the air floating ball socket and the base, the outer ring is driven to rotate relative to the air floating ball socket and the base by feedback deflection of a pitching gap sensor, the air floating ball socket and the base are fixedly mounted relative to the ground, the pitching gap sensor and the rolling gap sensor are mounted at positions of a rolling shaft and a pitching shaft of the inner ring respectively, a rotation angle sensor is mounted between the inner ring and the equatorial plane adaptor, an inner ring angle sensor is mounted between the inner ring and the outer ring, and an outer ring angle sensor is mounted among the outer ring, the air floating ball socket and the base.

Description

technical field [0001] The invention relates to a three-dimensional attitude measuring device for an air-floating ball bearing, belonging to the technical field of bearing attitude measuring devices. Background technique [0002] Precise measurement, high-precision attitude control, zero-gravity environment simulation, etc. require that there is no friction between two bodies that rotate relatively, or the friction force is as small as possible. The air suspension ball bearing realizes their non-contact and low friction relative rotation by spraying high-pressure gas from the throttle nozzle between the air suspension ball and the ball socket. Due to the characteristics of high stiffness and zero friction, air suspension ball bearings have been widely used in the fields of space zero-gravity environment simulation, precision assembly, and high-precision attitude control. [0003] Air suspension ball bearings mainly include air floating balls and ball sockets, both of which ...

AI Technical Summary

Problems solved by technology

However, the disadvantages of this measurement method are: 1. High cost, 2. The addition of the air-floating ball changes its quality characteristics, 3. The three-dimensional attitude of the air-floating ball bearing needs to be obtained through complex calculations, and the accuracy is limited

Another implementation method is to use indoor GPS, vision and other means to measure. Although this method can directly obtain the three-axis movement attitude of the air-floating ball bearing relative to the ground coordinate system, it is necessary to install targets and other equipment on the air-floating ball. At the same time, it needs It is used in conjunction with the indoor GPS or visual camera of the plant, and needs to be re-calibrated after each movement, which is not only complicated to use, high in cost, but also loses its independence

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