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Piston rod extension amount detection device and method

A detection device, piston rod technology, applied in the direction of measuring devices, electric devices, fluid pressure actuating devices, etc.

Pending Publication Date: 2022-07-22
JIANGSU XCMG CONSTR MASCH RES INST LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a device and method for measuring the extension of the piston rod, which solves the problems disclosed in the background technology

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  • Piston rod extension amount detection device and method
  • Piston rod extension amount detection device and method
  • Piston rod extension amount detection device and method

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Embodiment

[0081] The diameter of the inner hole of the cylinder 13 is 200mm, the length of the inner hole of the cylinder 13 is 5000mm, the diameter of the piston 12 is 198mm, the diameter of the piston rod 8 is 100mm, the diameter of the inner hole at the front end of the cylinder 13 is 103mm, and the piston 12 width 50mm, the inner hole width at the front end of the cylinder 12 is 50mm, the dielectric constant of hydraulic oil is 2.2, the dielectric constant of the phenolic cloth ring 11 is 8, and the dielectric constant of the insulating sealing sleeve 10 is 3. Take a hydraulic cylinder as an example, According to formula (8), the corresponding relationship between the protruding amount of the piston rod 8 and the capacitance between the cylinder probe 4 and the piston rod probe 6 is obtained as follows: Figure 4 shown.

[0082] The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from th...

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PUM

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Abstract

The invention discloses a piston rod extension amount detection device and method. The device comprises a power supply and signal transmission cable, a signal collector, a cylinder barrel measuring head cable, a cylinder barrel measuring head, a piston rod measuring head cable, a piston rod measuring head, a piston rod, a piston, a cylinder barrel, a power supply and an industrial equipment host. The piston and the inner wall of the cylinder barrel as well as the piston rod and the piston rod telescopic opening of the cylinder barrel are in insulating connection; the piston rod measuring head is connected with the signal collector through a piston rod measuring head cable and is in contact with the piston rod extending out of the cylinder barrel; the cylinder barrel measuring head is connected with the signal collector through a cylinder barrel measuring head cable, and the cylinder barrel measuring head is in contact with the cylinder barrel; the whole piston rod is divided into four capacitors, and before leaving a factory, dielectric constants of hydraulic oil, the phenolic aldehyde cloth clamping ring and the insulation seal are calibrated. In the using process, a capacitance formula can be used for solving a quadratic equation with one unknown, and the accurate extension length of the piston rod is obtained.

Description

technical field [0001] The invention belongs to the technical field of protruding amount detection, and particularly relates to a device and method for measuring the protruding amount of a piston rod. Background technique [0002] The detection of the extension of the hydraulic cylinder piston rod is the key technical basis for the intelligent control of industrial equipment such as construction machinery, machine tools, and marine machinery. In recent years, the detection of the extension of the hydraulic cylinder piston rod has received extensive attention. Foreign countries mainly use grating displacement sensor, binary bar code and other means to detect the extension of the piston rod, which has the problems of complex structure design, high manufacturing requirements and cost, and is not suitable for mass application. In China, external displacement sensors, magnetostrictive displacement sensors and other means are mainly used to detect the extension of the piston rod....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B19/00G01B7/02G06F17/11
CPCF15B19/00G01B7/026G06F17/11
Inventor 陈新春蹤雪梅何冰
Owner JIANGSU XCMG CONSTR MASCH RES INST LTD