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Vibration induction detection method and power frequency excitation detector

A detection method and detection instrument technology, which is applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve problems such as vibration stability and poor continuity, and achieve the effects of avoiding deviation, ensuring detection accuracy, and ensuring accuracy

Inactive Publication Date: 2018-02-16
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The vibration is generated by the electromagnet absorbing the armature, and the moment the armature contacts the electromagnet, an instantaneous impact is generated, so the stability and continuity of the vibration generated by this method are poor

Method used

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  • Vibration induction detection method and power frequency excitation detector
  • Vibration induction detection method and power frequency excitation detector
  • Vibration induction detection method and power frequency excitation detector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: The detection method of vibration induction provided in this embodiment is used for flaw detection of metal materials, including the following steps:

[0027] (1) Continuous vibration is generated through the stimulating circuit composed of 3 resistors, coil winding and iron core, and the generated vibration is directly applied to the surface of the metal material under test through the probe. The 3 resistors include a variable resistor and two fixed resistance;

[0028] (2) By adjusting the resistance value of the variable resistor to change the size of the current flowing in the coil winding, and then change the amplitude of the vibration generated by the stimulating circuit, adjust until the vibration induction signal appears on the metal material under test, that is, set the vibration threshold and pass the vibration induction The sensor acquires the vibration of the metal material under test. When the vibration reaches the threshold, the vibration sen...

Embodiment 2

[0033] Embodiment 2: The vibration induction detection method provided in this embodiment is used for the detection of body surface vibration tactile perception, including the following steps:

[0034] (1) Continuous vibration is generated through the stimulation circuit composed of 3 resistors, coil winding and iron core, and the generated vibration is directly applied to the body surface of the tester through the probe. The 3 resistors include a variable resistor and two fixed resistors. resistance;

[0035] (2) Change the size of the current flowing in the coil winding by adjusting the resistance value of the variable resistor, and then change the amplitude of the vibration generated by the stimulation circuit, and adjust it until the tester perceives the vibration;

[0036] (3) Measure and record the current values ​​flowing through the three resistors when the tester perceives the vibration and judge whether there are abnormal values. If there are abnormal values, remove ...

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Abstract

The invention provides a detection method of vibration induction, which generates continuous vibration through a stimulation circuit composed of resistance, coil winding and iron core and acts on the surface of the measured body, and then changes the vibration by adjusting the magnitude of the current flowing in the coil winding. Amplitude, record the current value of the resistance when the vibration induction signal occurs in the measured body; the present invention also provides a corresponding detector for the above method, including a host, a sliding rheostat and a stimulating probe unit, and the host includes AC / DC voltage conversion The module and the power supply circuit, the sliding rheostat is connected to the power supply circuit in a voltage-dividing connection mode, the stimulating probe unit includes an iron core, a coil winding electrically connected to the sliding rheostat, a connecting plate and a probe, the coil winding is wound on the iron core, and the iron core passes through the The connecting plate is connected with the probe; the present invention adopts a quantitative vibration induction detection method, obtains the vibration induction threshold through accurate detection, and then compares it with the standard value, thereby judging the detection index status of the measured object.

Description

technical field [0001] The invention relates to a detection method and a detector for vibration induction, belonging to the technical field of vibration detection. Background technique [0002] Vibration detection can be applied to material flaw detection and body surface vibration tactile perception detection, in which vibration generation and adjustment are two key issues in vibration detection. Existing vibration generating devices mostly use electromagnets as power components. After the electromagnets are energized, they generate magnetic force to absorb the armature. When the armature is absorbed, vibrations are generated. For example, the invention application "a digital vibration induction threshold detector based on embedded" (application number: CN201310129815), the vibration amplitude is adjusted by changing the AC voltage of the electromagnet; the utility model patent "a medical vibration generator" (application number: CN92242559), the vibration adjustment is con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/60
Inventor 郝国成康坊徐朝玉赵英俊白雨晓
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)