System with dual coil assemblies for online monitoring chippings in lubricating oil

Abstract

The invention discloses a system with dual coil assemblies for online monitoring chippings in lubricating oil. The system comprises a power module, a sensor module, a signal demodulation module and anupper computer, and is characterized in that the power module is provided with a first positive voltage output end, a negative voltage output end, a second positive voltage output end and a third positive voltage output end, the sensor module comprises a sensor driving module used for producing sensor excitation signals, a first excitation module, a first sensing module, a second excitation module and a second sensing module, and the signal demodulation module comprises a first differential amplification module, a first phase-sensitive demodulation module, a first lowpass filtering module, afirst super servo amplifier module, a second differential amplification module, a second phase-sensitive demodulation module, a second lowpass filtering module, a second super servo amplifier module,an AD sampling module and a DSP control module. The system has the advantages that the signal demodulation module has totally two paths, the detection missing rate is effectively lowered, the reliability of the detection result is improved, and the detection efficiency and detection precision are high.

Description

technical field [0001] The invention relates to an on-line monitoring system, in particular to an on-line monitoring system for lubricating oil debris of a double coil group. Background technique [0002] When the engine is in use, due to the wear and tear of various parts during operation, it not only reduces the service life of the engine, but also increases the maintenance cost of the engine; at present, by detecting and analyzing the particles in the oil in the engine and hydraulic system , can detect the wear and tear of the equipment in time, so as to find the faulty equipment in time. [0003] Most of the existing detection methods use regular collection of oil and send it to the designated detection site for offline detection, which cannot detect faults in time; there are also metal scanners for online monitoring of large metal abrasive particles developed abroad. The cost of this equipment is relatively high, and due to This technology originated from aircraft and ...

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Problems solved by technology

[0003] Most of the existing detection methods use regular collection of oil and send it to the designated detection site for off-line detection, which cannot detect faults in time; there are also metal scanners developed abroad for online monitoring of large metal abrasive particles. This technology originated from aircraft and bus engines, and involves the core technology of the national aviation industry, which restricts the application of foreign technologies in China. However, the domestic research on the online detection technology of metal scraps in oil has only been carried out in the past five years. In principle experiment stage

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