Turntable angle measurement device

Abstract

The invention discloses a turntable angle measurement device. The device comprises a grating encoder, a reading head, a subdivision machine and an IK121 counting card. The encoder uses a Renishaw photoelectric incremental RESM angular encoder and a corresponding reading head as an angle feedback component and selects a Heidenhain IK121 counting card as a main subdivision processing unit. When a turntable axis rotates, the encoder generates an angular encoding signal, which is sent to the subdivision machine for processing such as subdivision and the like; an output simulation sine signal enters the IK121 counting plate for processing; finally, a high-multiple subdivided encoder signal is output and sent to a turntable axis control board card. The turntable angle measurement device in the invention reduces installation errors of the angle measurement device, improves the subdivision multiple of the angular encoding signal and further improves measurement repeatability and measurement resolution of the angle measurement device.

Description

technical field [0001] The invention relates to inertia testing equipment, in particular to an angle measuring device of a turntable equipment. Background technique [0002] For most conventional electric turntables, the angle measuring device with the grating encoder as the main feedback component is the main choice. Since the grating encoder and the reading head are fixed to the shaft end of the turntable with screws, there are inevitably installation errors. , and is limited by the device accuracy of the grating encoder itself, resulting in poor position repeatability and measurement resolution of the turntable. Therefore, improving the resolution of the angle measuring device has always been the goal pursued by the industry. [0003] At present, in conventional grating encoders, the encoder ring is installed on the shaft end, and a corresponding reading head is installed next to the encoder. When the turntable shaft rotates, the light-emitting tube and the grating gene...

AI Technical Summary

Problems solved by technology

This structure has only one reading head. If there is an error in the installation of the encoder, which causes the gap between the encoder and the reading head to change, it will easily cause the inaccurate reading position of the reading head and affect the position repeatability. The encoder signal is only subdivided by a low-multiplier subdivider, so its angular position resolution cannot meet the requirements of a high-precision turntable

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