Grooved ceramic piston rod absolute position displacement measurement system and measurement method

Abstract

The invention discloses a grooved ceramic piston rod absolute position displacement measurement system and measurement method. The method comprises the steps that an upper groove group and a lower groove group are separately arranged on a piston rod, and the upper groove group and the lower groove group are different in structure; and an absolute position of the piston rod is obtained by correspondingly measuring the upper groove group and the lower groove group through a corresponding upper magnetic Hall sensor and lower magnetic Hall sensor. Through the above mode, according to the grooved ceramic piston rod absolute position displacement measurement system and measurement method, through the design of the two groups of grooves, the position cannot be lost after power failure, and when one sensor is damaged, a user can have sufficient time to replace the damaged sensor or know the current position without replacing the damaged sensor.

Description

technical field [0001] The invention relates to the field of oil cylinder stroke detection, in particular to a measurement system and method for measuring the absolute position and displacement of a ceramic piston rod with grooves. Background technique [0002] At present, the grooved ceramic piston rod mainly uses a single magnetic Hall sensor to detect the number of maser signals sent when the piston rod extends and retracts the cylinder, and converts the relative moving distance and relative position of the piston rod. In an emergency, after the equipment is powered off for a long time and then restarted, or the piston rod of the cylinder moves during the long-term power failure, the detection system will lose its current position after the power supply is restored again. Some manufacturers have increased the backup power supply to extend the data storage time for several days. However, it still cannot solve the position loss caused by movement during power failure. [...

AI Technical Summary

Problems solved by technology

Helical grooves with different pitches + phase array sensor technology, due to the overly complex phase array sensor integration technology, resulting in high hardware costs, high maintenance costs, and no reasonable emergency alternatives if the phase array sensor group fails, the practicability is poor

The grooves used in the above two schemes mostly adopt the straight groove thread method. When the straight groove thread groove is spraying ceramics, the coating and the groove cannot be balanced due to the spraying angle, and there is a spraying dead angle, so Poor bond strength between coating and piston rod substrate

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