A system and method for gap detection based on collision vibration

A detection system and gap technology, applied in the direction of measuring devices, reducing greenhouse gases, instruments, etc., can solve the problems of reducing the life of mechanical systems, failing to detect, increasing operating noise, etc., and achieve the effect of improving accuracy and efficiency

Active Publication Date: 2022-07-12
LANZHOU JIAOTONG UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to factors such as design, manufacturing or assembly errors, there will be gaps between the parts in the mechanical system. In addition, after the long-term operation of the mechanical system, due to factors such as vibration, temperature difference or component fatigue, there will also be gaps between the parts of the mechanical system. Gap, the gap will cause adverse effects on the operation of the mechanical system, causing harmful vibration of the mechanical system, increasing operating noise, reducing mechanical operating efficiency, and reducing the life of the mechanical system, etc.
[0003] The traditional gap detection method is mainly manual measurement, using probe method, caliper method, capacitance method, eddy current method or laser, etc. The above-mentioned measurement methods have the following defects: ① The traditional method is mainly to detect a certain point, which cannot realize the mechanical system All-round detection; ②It cannot be detected during the operation of the mechanical system

Method used

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  • A system and method for gap detection based on collision vibration

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Effect test

Embodiment 1

[0027] like figure 1 As shown, in order to realize the all-round detection of the mechanical system 1 and determine that there is a gap in the mechanical system 1, a gap detection system based on collision vibration includes a test bench 2 and a mechanical system 1, as well as a vibration exciter 4, a frequency sweep signal generator device 3, speed sensor 7, data processing system and signal processing system 5, the frequency sweep signal generator 3 is electrically connected with the exciter 4, the speed sensor 7, the data processing system and the signal processing system 5 are electrically connected in turn, The vibration exciter 4 is fixedly arranged on the test bench 2, and the vibration exciter 4 includes the main body of the exciter 4 and the exciter top rod (402); the exciter top rod (402) has a gap between the mechanical system One side (102) is connected, and the speed sensor 7 is connected to the other side (103) of the mechanical system gap.

[0028] The mechanic...

Embodiment 2

[0031] A method for detecting thread loosening clearance of a mechanical system based on collision and vibration, the specific detection steps are:

[0032] 1) Start the frequency sweep signal generator 3, and the frequency sweep signal generator 3 transmits the frequency sweep signal whose excitation frequency is 0-300 Hz to the exciter 4; The given excitation frequency makes the ejector output simple harmonic excitation of the corresponding frequency;

[0033] 2) The sensor connected with the top wooden board transmits the detected speed data to the data processing system, and the data processing system records the data;

[0034] 3) The signal processing system 5 processes the data in the data processing system, and displays the situation that the speed of the detected top wood board varies with time under various frequencies given by the frequency sweep signal;

[0035] 4) If the velocity of the top plank changes with time at any excitation frequency, it is always a single...

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Abstract

The invention discloses a system and method for gap detection based on collision and vibration, belonging to the field of component gap detection in mechanical systems, including a test bench and a mechanical system, as well as a vibration exciter, a sweep frequency signal generator, a speed sensor, and a data processing device. system and signal processing system, the frequency sweep signal generator is electrically connected with the vibration exciter, the speed sensor, the data processing system and the signal processing system are electrically connected in sequence, the vibration exciter is fixedly arranged on the test bench, the The exciter includes a main body of an exciter and a top rod of the exciter; the top rod of the exciter is connected to one side of the gap of the mechanical system, and the speed sensor is connected to the other side of the gap of the mechanical system. Based on the collision vibration theory, the invention can realize all-round detection of the mechanical system by using a vibration exciter, a frequency sweep signal generator, a speed sensor, a data processing system and a signal processing system, so as to determine whether there is a gap in the mechanical system.

Description

technical field [0001] The invention belongs to the field of clearance detection of components in mechanical systems, and in particular relates to a clearance detection system and method based on collision vibration. Background technique [0002] Due to factors such as design, manufacturing or assembly errors, there will be gaps between components in the mechanical system. In addition, after a long-term operation of the mechanical system, due to factors such as vibration, temperature difference or component fatigue, there will also be gaps between the components of the mechanical system. Clearance and clearance will cause adverse effects on the operation of the mechanical system, causing harmful vibrations in the mechanical system, increasing operating noise, reducing the efficiency of mechanical operation, and shortening the life of the mechanical system. [0003] The traditional gap detection method is mainly manual measurement, using the probe method, the caliper method, ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G01B21/16
CPCG01B21/16Y02E30/30
Inventor孟建军董世昌宋浩胥如迅李德仓潘彦龙
OwnerLANZHOU JIAOTONG UNIV