Radial magnetic field-based online abrasive grain monitoring sensor and monitoring method

A technology for monitoring sensors and radial magnetic fields, applied in instruments, material magnetic variables, analyzing materials, etc., can solve problems such as interference, fluctuation of monitoring results, inability to meet early fault prediction, etc., to reduce magnetic resistance, increase magnetic flux, The effect of increasing sensitivity

Inactive Publication Date: 2012-01-04
BEIHANG UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Firstly, the accuracy needs to be improved, which cannot meet all the needs of early fault prediction; secondly, the fluctuation of monitoring results is relatively large, and the interference is serious

Method used

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  • Radial magnetic field-based online abrasive grain monitoring sensor and monitoring method
  • Radial magnetic field-based online abrasive grain monitoring sensor and monitoring method
  • Radial magnetic field-based online abrasive grain monitoring sensor and monitoring method

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Embodiment Construction

[0031] The online wear particle monitoring sensor and its monitoring method of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] like figure 1 As shown, a traditional electromagnetic sensor is detecting abrasive particles. The coil 6 is directly wound on the oil pipe to form a magnetic field excitation source, and an axial magnetic field is applied to the oil pipe 5 . When the abrasive grains enter the sensor, the inductance of the coil 6 changes, and by detecting the inductance change, the material and size of the abrasive grains can be detected to a certain extent.

[0033] like figure 2 As shown, the online wear particle monitoring sensor of the present invention mainly includes a magnetic field excitation source 1 , an iron core 2 , a detection coil 3 and an amplifying circuit 4 . The magnetic field excitation source 1 generates a stable magnetic potential, and a stable magnetic field is obtained through the ir...

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Abstract

The invention discloses a radial magnetic field-based online abrasive grain monitoring sensor and monitoring method. The sensor comprises a magnetic field excitation source, an iron core, a detecting coil and an amplifying circuit, wherein a stable static magnetic field generated by the magnetic field excitation source forms a stable radial magnetic field by iron core optimization for being used for an oil pipe; and when an abrasive grain in the oil pipe generates inducing voltage by the detecting coil, the amplifying circuit carries out noise reducing and amplification processing output on the inducing voltage. The monitoring method comprises the following steps of: obtaining the induced voltage by the sensor; after processing the induced voltage by the amplifying circuit, obtaining an effective voltage signal; and confirming the motion speed, materials and size information of the abrasive grain by analyzing the waveform of the effective voltage signal. The invention uses the stable radial magnetic field as the monitoring magnetic field, optimizes the distribution of the magnetic field by an iron core, can effectively improve the sensitivity and precision of the sensor, is suitable for of the online abrasive grain monitoring of a hydraulic system and can provide service for the demand of state monitoring, fault diagnosis and service life prediction of the hydraulic system.

Description

technical field [0001] The invention belongs to the technical field of state monitoring, fault diagnosis and life prediction of a hydraulic system, and in particular relates to an online wear particle monitoring sensor based on a radial magnetic field and a monitoring method thereof. Background technique [0002] With the wide application of hydraulic systems, people have higher and higher requirements for the reliability of hydraulic systems. Therefore, the state monitoring, fault diagnosis and life prediction technology of hydraulic systems have become one of the hot spots in the industry. [0003] As an important part of the hydraulic system, hydraulic oil plays an important role in transmitting force and movement, lubrication and cooling, which makes the pollutants in the hydraulic oil imply a lot of information about the operating state of the system. For example, under normal circumstances, the wear of mechanical parts can be divided into three stages: the running-in s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/00G01N27/72
Inventor 洪葳王少萍韩磊
Owner BEIHANG UNIV
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