A probe space attitude measurement method guided by ultrasonic positioning

Abstract

The invention discloses a measuring head space posture measuring method guided by ultrasonic positioning. The method is characterized in that an ultrasonic positioning guidance measuring head is provided. The ultrasonic positioning guidance measuring head comprises a flat plate, the front face and the back face of the flat plate are respectively and fixedly provided with a set of ultrasonic transmission sensors, each set of ultrasonic transmission sensors comprises four ultrasonic transmission sensors, the bottom side of the flat plate is connected with a probe, an electromagnetic transmission antenna is installed on the top side of the flat plate, the four ultrasonic transmission sensors in each set are excited by four ultrasonic frequencies of different values, and normal directions of vibration faces of the four ultrasonic transmission sensors in each set are pointed to the same direction of the outer side face of the flat plate. According to the method, direct measuring on six-degree-of-freedom postures of measuring head space is achieved, measuring error, caused by linearity of a large-stroke guide rail of a large-size measuring machine, stress deformation in a measuring head elastic supporting body, imbalance force of the elastic supporting system and the like, is removed, and the precision and reliability of large-size measuring are improved.

Description

technical field [0001] The invention relates to the technical field of space coordinate measurement, in particular to a method for measuring the space attitude of a measuring head guided by ultrasonic positioning. Background technique [0002] Large-scale measurement and key technologies are an important indicator to measure a country's level of scientific and technological development and to measure a country's comprehensive strength. At present, the large-scale measurement system is composed of two coordinate systems, one is composed of the coordinate system of the large-travel space coordinate axis, and the other is composed of the coordinate axis of the probe. The coordinate value of the space coordinate measurement point is determined by the The measured value is confirmed. [0003] Large-travel spatial coordinate measurement is realized by moving the probe on the guide rail. Due to the influence of the straightness error of the guide rail during the movement of t...

AI Technical Summary

Problems solved by technology

Due to the influence of the straightness error of the guide rail during the movement of the probe, the axis directions of the three coordinate axes of the two coordinate systems cannot always maintain a parallel position. In the large-travel space coordinate system of the probe, not only the axis direction At the same time, there are also measurement errors caused by the rotation angle yaw and pitch angle yaw.

In addition, the probe will also produce measurement errors in the axis direction and various deflection errors in the probe coordinate system under the action of the internal stress of the elastic support body and the unbalanced force of the elastic support system.

Images