Electrostatic sensing experimental system and particle frictional charge measuring method

An experimental system and electrostatic sensor technology, applied in measurement devices, measurement of electrical variables, measurement of current/voltage, etc., can solve the problems of inaccurate results and difficulty in ensuring the reliability of the monitoring system, and achieve accurate measurement results, simple structure, Easy-to-use effects

Active Publication Date: 2014-05-07
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

The interaction mechanism between the charged abrasive particles and the oil medium is still not well explained, which also leads to inaccurate results when the electrostatic sensor measures the static electricity carried by the abrasive particles in the oil, which leads to the entire monitoring The reliability of the system is difficult to guarantee
In applications such as aircraft, naval engines, transmission systems, etc., this flaw can have extremely serious consequences

Method used

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  • Electrostatic sensing experimental system and particle frictional charge measuring method
  • Electrostatic sensing experimental system and particle frictional charge measuring method
  • Electrostatic sensing experimental system and particle frictional charge measuring method

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Embodiment Construction

[0030] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0031] In the present invention, the frictional contact between particles and solid materials in the air carries a certain amount of charge through experiments to simulate the charge of abrasive particles in the process of friction and wear. The theoretical voltage amplitude is obtained by measuring the charge, and then the charge The electric particle is injected into the liquid medium, and the pulse amplitude is detected when the particle passes through the electrostatic sensor. The relationship between the initial theoretical voltage value of the particle and the actual voltage value measured after the particle interacts with the liquid medium will reflect the interaction between the particle and the liquid medium mechanism. At the same time, uncharged particles can be directly injected into the liquid medium, and the pulse amplitude is also detected...

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Abstract

The invention discloses an electrostatic sensing experimental system, which comprises a charged particle generating device and a charged particle static voltage measuring device. The charged particle generating device comprises a frictional contact tube made of insulating material and a contact tube cover. The charged particle static voltage measuring device comprises a Faraday cup and an induced voltage measuring unit, wherein the induced voltage measuring unit is electrically connected with an inner cup of the Faraday cup and insulated to an outer cup of the Faraday cup. The Faraday cup is provided with a coaxial through hole in the vertical direction. The experimental system further comprises a charged particle injection experimental apparatus. The invention further discloses a particle frictional charge measuring method, an induced voltage measuring method for charged particles in liquid medium, and an electrostatic sensor calibrating method. The electrostatic sensing experimental system is simple in structure and convenient in operation, can be used for various experiments according to actual situation, and has certain electromagnetic interference resistance, accuracy in measuring result and high sensitivity.

Description

technical field [0001] The invention relates to an electrostatic sensing experiment system and a method for measuring particle frictional charge, belonging to the technical field of electrostatic measurement. Background technique [0002] Static electricity is often considered to be the cause of failure. For example, from the traditional point of view, it is one of the main causes of fires, explosions and other accidents in petroleum, chemical, crushing and processing industries. Since the 1950s, it has been developed based on the principle of electrostatic induction for the measurement of particle flow parameters (such as flow velocity, flow rate and concentration) in gas-solid two-phase. Recently, electrostatic induction technology has been developed for condition monitoring, which has been used as an important online monitoring method for the monitoring of wear particles produced by friction and wear of parts. For example, a Chinese invention patent "On-line Monitoring M...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R29/24G01R19/00
Inventor 左洪福陈志雄詹志娟张营杨珺
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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