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Electrostatic induction based metal surface contact damage on-line monitoring system and monitoring method

A metal surface, electrostatic induction technology, applied in the direction of measuring devices, material analysis through electromagnetic means, instruments, etc., to achieve the effect of compact hardware structure and prevent damage

Inactive Publication Date: 2012-06-27
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] None of the above detection methods is omnipotent, and there are not many methods that can realize online monitoring

Method used

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  • Electrostatic induction based metal surface contact damage on-line monitoring system and monitoring method
  • Electrostatic induction based metal surface contact damage on-line monitoring system and monitoring method
  • Electrostatic induction based metal surface contact damage on-line monitoring system and monitoring method

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Experimental program
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Embodiment Construction

[0043] The specific implementation of the system is introduced as follows in conjunction with the accompanying drawings:

[0044] 1. The composition of the system is as figure 1 As shown, it consists of electrostatic sensor (including: electrostatic induction head 2, shielding cover 8, insulating part 10, charge amplification circuit 9), signal acquisition and analysis system (including: computer and signal processing program 5, signal conditioning acquisition hardware 6), and sensor The installation frame 7 and other auxiliary parts are composed, and the signal acquisition card in the acquisition hardware adopts NI company WLS9234 digital acquisition card, and the computer adopts a general-purpose PC based on the windows platform.

[0045] The sensor is the core device of the system. The structure of the sensor is as follows: figure 2It is composed of an electrostatic induction head 2, a shielding cover 8, an insulating part 10, and a charge amplification circuit...

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Abstract

The invention discloses an electrostatic induction based metal surface contact damage on-line monitoring system and a monitoring method. The system provided by the invention contains an electrostatic transducer, a signal acquisition and processing analysis system and an auxiliary part, wherein the electrostatic transducer is composed of an electrostatic induction head, a shielding cover, an insulation part and a charge amplifying circuit; the signal acquisition and processing analysis system is composed of a computer, a signal processing program and a signal conditioning acquisition hardware; and the auxiliary part contains a sensor mounting rack. The system can be utilized to monitor metal surface contact damage on line, determine whether there is contact damage on the metal surface and determine the degree of the damage. The monitoring system and the method belong to the field of direct monitoring of damaged surface and can replace commonly-used monitoring systems and methods by secondary influence parameters such as vibration signal monitoring, temperature monitoring and the like.

Description

technical field [0001] The on-line monitoring system and monitoring method for metal surface contact damage based on electrostatic induction of the present invention relate to comprehensive detection of metal surface contact damage and belong to the field of sensor measuring instruments. Background technique [0002] There are dozens of existing methods for detecting or monitoring contact damage on metal surfaces, and the most commonly used methods include: radiographic testing, ultrasonic testing, eddy current testing, and acoustic emission. [0003] Radiographic inspection is to use the transmission properties of various rays to materials and the different degrees of absorption and attenuation of rays by different materials, and to evaluate the quality, size and characteristics of the inspected parts according to the obtained images. The disadvantage is that the detection sensitivity to plane defects is relatively low. Low cost, high detection cost; ultrasonic testing has ...

Claims

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Application Information

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IPC IPC(8): G01N27/61
Inventor 左洪福徐一鸣陆晓华陈志雄
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS