Linear long-distance absolute value position optical encoder

Abstract

The invention discloses a linear long-distance absolute value position optical encoder, belongs to the technical field of displacement sensors and aims to overcome the limitation of a rotary encoder in short-distance transportation precise positioning detection. The linear long-distance absolute value position optical encoder comprises a yardstick, a reading head and a signal processing circuit. The reading head moves forth and back in a straight line in the length direction of the yardstick and scans the yardstick. The yardstick is provided with an address code grating and a clock period grating. According to the invention, the reading head and yardstick separated structure is adopted, the yardstick is installed and fixed to a suitable position, parallel to an operation rail, of the ground, and the yardstick is provided with the corresponding address code grating; in addition, the reading head scans the yardstick in movement, a signal processing circuit determines scanned address codes fixed on the yardstick in real time and determines the practical position of the reading head relative to the yardstick.

Description

technical field [0001] The invention belongs to the technical field of displacement sensors, and more specifically, belongs to a linear long-distance absolute value position optical encoder. Background technique [0002] Equipment or vehicles that move on rails from tens of meters to hundreds of meters in the prior art, such as ladle transport vehicles used in iron and steel plant workshops, hot coke transport vehicles used in coke plant workshops, or special rail transport vehicles for launch vehicles The ladle transport vehicle used in the workshop of the iron and steel plant needs to accurately move to the corresponding position to transfer the molten steel in the ladle for the next process. The hot coke transport vehicle used in the coke plant workshop needs to accurately move to the corresponding position to unload Heat coke is removed for dry or wet quenching process, and the special rail transport vehicle of the launch vehicle needs precise control during the process ...

AI Technical Summary

Problems solved by technology

[0004] Due to factors such as the accuracy of the rotary encoder itself, the structural error of the equipment or the vehicle's own transmission system, and the joint influence of many other factors in the on-site environment, the position results of the equipment or vehicle relative to the track detected by the rotary encoder are not accurate. Not very accurate; with the increase in the use time of these devices or vehicles, the internal accumulated deviation will have a great impact on the detection results, and the uncertainty of the detection results is very large

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