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Absolute type stroke detecting method and apparatus combing with ceramic cylinder rod to use

A technology of stroke detection and piston rod, which is applied in the field of absolute stroke detection method and its device, can solve the problem of undetectable displacement and achieve the effect of relative position stability

Inactive Publication Date: 2008-10-08
JIANGSU WUJIN HYDRAULIC HOIST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the principle used is still two signals with a phase difference of 90 degrees to measure the displacement and direction of movement, so this technology cannot detect the displacement generated during the power-off and power-on period of the system

Method used

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  • Absolute type stroke detecting method and apparatus combing with ceramic cylinder rod to use
  • Absolute type stroke detecting method and apparatus combing with ceramic cylinder rod to use
  • Absolute type stroke detecting method and apparatus combing with ceramic cylinder rod to use

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Embodiment Construction

[0026] Such as figure 1 , 2, 3 and 4 show an absolute stroke detection device used in combination with a ceramic piston rod, including a detection section on the piston rod 1 and a sensor 2 for reading coded information on the detection section. The detection section is divided into a plurality of continuous sections along the axial direction, and a set of marks is set in each section. This set of marks can be recognized by the sensor 2 and converted into a set of unique codes. This set of marks includes zone marks 3 and The area code mark 4, the area mark 3 and its corresponding group of area code marks 4 can be recognized by the sensor 2 and converted into the area code and a group of unique area code codes representing the section where the current area mark 3 is located, and the adjacent area code marks 4 Separated by zone markers 3, the zone markers 3 of each section are uniformly standardized and arranged equidistantly. The detection section on the piston rod 1 is comp...

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Abstract

The invention relates to an absolute stroke detecting technology, in particular to an absolute stroke detecting method used combining with a ceramic piston rod and a device thereof. The detecting section of the piston rod is divided into a plurality of continuous segments along an axial direction and a group of marks are arranged within each segment. The group of marks can be identified and converted into a group of unique codes by a sensor which is used for reading the codes of varied marks of current positions, then decoding and identification is carried out to the codes read by the sensor to know the segment where the sensor is located and the offset of the position of a corresponding segment where the sensor is located and then the current absolute position of the sensor can be obtained by combining the segment where the sensor is located with the offset of the position of the corresponding segment where the sensor is located. The sensor is an initiative magnetic detecting type and the marks on the piston rod represent to be a series of well-regulated grooves and bulge loops. The absolute stroke detecting technology guarantees that no impact is caused to the read of the position of the piston rod during power-off period and no accumulated error exists.

Description

technical field [0001] The invention relates to an absolute stroke detection technology, in particular to an absolute stroke detection method and its device used in combination with a ceramic piston rod. Background technique [0002] The working environment of the hydraulic hoist is complex and changeable, so the anti-corrosion and wear-resistant performance of the piston rod is highly required, so the necessary anti-corrosion and wear-resistant treatment must be carried out on the surface to ensure the performance. The traditional process is to electroplate chromium on the surface of the piston rod, and the hexavalent chromium ion in the electroplating chromium has been proved to be a carcinogen. And it has been proved by practice that the electroplated piston rod will inevitably be rusted after being put into operation for many years. Therefore, electrochrome plating is not a method that can fundamentally solve the corrosion resistance of the piston rod. Spraying ceramics...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B15/28G01D5/14G01B7/00
Inventor 沈建明高吉元吴国栋汤云徐志峰姚加明朱琴玉
Owner JIANGSU WUJIN HYDRAULIC HOIST
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